Mechanical properties of concrete. Models and numerical simulations for.
Mechanical properties of concrete The process of batching, mixing, transporting, placing, compacting, and finishing of concrete in a plastic state seriously affects the properties of the hardened Mechanical Properties of Concrete and Steel Reinforced Concrete (RC, also called RCC for Reinforced Cement Concrete) is a widely used construction material in many parts the world. Haber, and Benjamin A. In addition, while one-part and two-part geopolymers exhibit similar properties, their differences in mechanical The objective of the present study is to examine the effects of different types and content of steel fibers on the workability, mechanical properties, and ductility enhancement of lightweight aggregate concrete (LWAC). This paper provides an experimental study to measure the mechanical properties of seashells concrete, such as compressive strength, tensile strength, flexural strength and modulus of elasticity. Yu et al. M. In this paper, a novel bond stress-slip model It is well known that the mechanical properties of a material are related to lateral confinement. In Described in this paper are the test results of mechanical properties of several kinds of concrete mixes at very low temperatures and an investigation into the mechanism of change in their properties, for the purpose of obtaining design data for concrete structures exposed to very low temperatures, such as liquefied natural gas storage tanks Addition of steel fibres to concrete is known to have a significant positive influence on the mechanical properties of concrete. For this purpose, this study investigated CO 2 mineralisation by recycled concrete is a novel approach of carbon capture and utilisation to improve the sustainability of concrete products, which has attracted increasing attention in recent years. The mechanical properties including compressive strength, flexural strength, flexural strength to compressive strength ratio, fracture energy were explored. In 2006, Yakovlev et al. High temperature exposure produces changes in the transport and mechanical properties of concrete, but the effect of cement type has not been widely studied in the literature. The result of better mechanical properties shows when the fiber is five centimetre long Download Citation | On Jan 1, 2024, Jie Yan and others published Mechanical Properties and Microstructure of Carbon Fiber-Reinforced Nano-Metakaolin Recycled Concrete | Find, read and cite all the The study and utilization of fully recycled aggregate concrete (FRAC), in which coarse and fine aggregates are completely replaced by recycled aggregates, are of great significance in improving the recycling rate of construction waste, reducing the carbon emission of construction materials, and alleviating the ecological degradation problems currently faced. Enormous research was conducted on the curing Scientists are searching for an alternate appliance to tackle concrete difficulties by diffusing fibers in concrete manufacturing for various uses, which would allow them to use less cement [15]. 74:5. A laboratory test was carried out in the study to analyze the impact of fiber reinforced concrete (FRC) on plain cement concrete (PCC) and roller compacted concrete (RCC), The fire behavior of a structural masonry building has a positive relationship with the behavior of its constituent materials under high temperatures. Jones, I. Therefore, rubber concrete (RC) can effectively solve this problem. Zhang, W. That is, with a constant water (ice)–cement ratio, the mechanical properties of concrete are positively correlated with the ice content, but exhibit a nonlinear correlation. It maintains surface humidity to prevent rapid evaporation of internal moisture, promoting adequate hydration, and also reduces volume shrinkage caused by water loss. An optimum mixture of steel and micro PP fibres added to Though the available literature shows considerable amount of studies that investigate the possibility of incorporating different types of fibre such as steel fibre, glass fibre and natural fibre in concrete to improve the mechanical properties of concrete, a very limited number of studies have been conducted on using carbon fibre in concrete due to the common view Globally, concrete is the most widely used construction material. This paper presents a comprehensive review on carbonation mechanisms related to CO 2 mineralisation and hydration, microstructure and multiscale This research aims to reuse glass and plastic wastes by combining them in concrete to protect the environment and obtain green concrete with acceptable properties. A laboratory test was carried out in The influence of recycled waste plastics on the fresh properties of concrete is discussed first, followed by its influence on the mechanical and durability properties of concrete. 11 studied the mechanical properties of different phases of concrete and determined its properties by examining concrete with atomic precision and simulating it with nanometer Several investigators have studied the properties of recycled aggregate concrete confined by steel tubes. Table 2 summarizes the efforts of various authors and the major conclusions drawn based upon these studies. , 2008). Ward. Three different curing regimes were applied, namely, continuous normal water curing (NW), initial water curing for 28 days before exposure to an open air environment (OA), and properties of seashell ashes and the mechanical properties of fresh and hardened concrete such as workability, compressive stren gth, tensile strength, fl exural strength and modulus of Incorporating fibers is an effective way to improve the tensile and flexural properties of the concrete matrix [2][3][4][5]. Luo, L. In this paper, concrete is described as a three Additionally, from determination of mechanical properties, relationships between mechanical properties of RAC were established. 46 %, 49. [15] evaluated the use of C&D waste in the construction industry. “Mechanical properties of concrete incorporating high volumes of fly ash from sources in the U. However, their low tensile-compressive ratio and poor toughness can easily lead to cracking in concrete structures when subjected to external forces, and in severe cases, this may even result in structural failure and collapse [1, 2]. In The mechanical properties of reinforced concrete (RC) structures are closely related to the bond stress-slip relationship of rebar-concrete interface. S. Author(s): Parviz Soroushian, Ataullah Khan, and Jer-Wen Hsu. Generally speaking, the mechanical properties of concrete is closely related to its porosity. However, the research on the material properties of steel fiber-reinforced geopolymer concrete (SFGPC) after high temperature exposure is still very limited. The civil engineering structures are encountered by impact loads during their life span of structures which is very significant from strength criterion Keywords: design equations; expanded granules; lightweight aggregate concrete; mechanical properties. Google Scholar. Therefore, the application of SCA to the surface modification of PVC Concrete materials are widely used in the field of construction due to their excellent compressive strength. Wang [45] modified ABS/PC plastics with SCA and incorporated them into concrete to improve the mechanical properties of the concrete. In spite of concrete mixture proportions, test modalities, such as specimen size, stressed/unstressed conditions and hot/residual states, also influence the mechanical properties of concrete at high temperature (details are in Section 4). Appears on pages(s): 535-540 High-strength self-compacting concrete (HSSCC) is formulated to have high compressive strengths, typically exceeding 60 MPa. Constr. The heating equipment was an electrically heated furnace, which had a capacity of 18 cylinders or 3 cubes. The entire scopus database was examined for co To investigate the mechanical properties of concrete after high temperature exposure, 200 °C, 400 °C, 600 °C and 800 °C were selected as the heating target temperature according to our prior researches and other relevant papers [5], [12], [13], [14]. The mix design ratio of plain concrete (PC) is 1:0. A total of fifteen mixtures of normal- and high-strength pervious concretes with steel fiber or glass The present study aims to investigate the mechanical properties of concrete using potable water, river water, deep well water, and rainwater for mixing and curing concrete. Materials and Method The Ordinary Portland cement type I was used as a main binder. ACI 318-19 and CSA A23. The mechanical properties of the RAC were enhanced by both single and hybrid additions of CFs and NS, and the hybrid addition had a better 3D concrete printing (3DCP) technology is under development for two decades and continues to thrive [1, 2]. The optimum value is obtained at a 10% replacement ratio; after that, increasing the replacement ratio of GP The properties of concrete in two states, the plastic and the hardened state, are vital for an engineer. The tensile test showed that the composite has a less brittle character than To evaluate the mechanical properties of concrete made with ceramic material, concrete test specimens were made in various moulds appropriate for the test plan. However, it has low tensile strength and low energy absorption [14]. (1988). 2472-2482. The This paper examines the mechanical and durability properties of concrete incorporated with treated recycled concrete aggregate (RCA) under different curing conditions. Compared with aggregate, the mechanical properties of mortar are relatively low [50, 61]. 53 %, and 54. Thirteen LWAC mixtures were prepared using different types of steel fibers including conventional hooked-end macro steel fibers (SF(H)), straight This shows that with an increase in ice content, the mechanical properties of concrete gradually improve, but the increase decreases. [51] first used CNT for cementitious materials. DOI: 10. 3%, respectively. The use of basalt fiber-reinforced polymer (BFRP) bars as a The mechanical properties UCS and STS are highly sensitive to the curing age with relative importance of 36. Volume: 89. 5%, 1% and 1. Coconut fiber improves the flexural toughness in the concrete. , 2022; Zdeb, 2019). There have been a lot of studies reported on characterization of mechanical properties of polymer concrete since early 1970s. Test results Table 12 compares the mechanical properties of concrete with steel fibers between the current study and previous research. The mechanical properties of concrete are determined by components in its mixture. 14 and 15 show the velocity of the ultrasound waves for all lengths, for all proportions, and at ages 28 and 56 days. These properties have increased value as temperature decreases. Thus, use of GFNS and This review investigates the mechanical properties of concrete incorporating four types of waste plastics—High-Density Polyethylene (HDPE), Low-Density Polyethylene (LDPE), Polyvinyl Chloride Properties of concrete are influenced by many factors mainly due to mix proportion of cement, sand, aggregates and water. , 90(6), 535–544. J. 5 kg/cm 3) are determined for application at the Nazixia Hydropower Station. 2 Meth odo log y and ex per ime ntat ion. This work proposes to examine the standard for the determination of the The use of SCA modification can effectively improve the bonding effect between plastic and cement to increase the strength of concrete. Google Scholar This study aimed to improve the mechanical properties and microstructure of recycled aggregate concrete (RAC) by incorporating carbon fibers (CFs) and nano-SiO2 (NS) to promote the optimal utilization of RAC. 1. Ultra-high-performance fiber reinforced concrete review: constituents, properties, and applications The Influence of Hybrid Fiber Ratio on the Mechanical Properties of Concrete. Dynamic properties of carbon-nanofiber-reinforced concrete. Freeze/thaw protection of concrete with optimum rubber crumb content[J] Tavakoli et al. Extensive databases used for evaluating the mechanical The mechanical properties were tested for studying their impact on concrete. 5. Therefore, this study draws on the research results of Huang et al. A. Key characteristics include compressive strength, which measures the material's The mechanical properties of concrete under different water saturation and low temperature conditions are investigated from the uniaxial compression and splitting tensile strength tests. 2. Therefore, the The impact of incorporating different fibers and SCMs into concrete to enhance its mechanical and durability properties has been extensively studied. Consequently, the existing concrete constitutive models may not fully or accurately represent the mechanical properties and detailed behavior of concrete in various internal regions of the specimen. Richardson, K. Ratio of these materials control the various concrete properties which are discussed below. Mohammadian and Haghi [18] explained that increasing the amount of fibres in the matrix The study and utilization of fully recycled aggregate concrete (FRAC), in which coarse and fine aggregates are completely replaced by recycled aggregates, are of great significance in improving the recycling rate of construction waste, reducing the carbon emission of construction materials, and alleviating the ecological degradation problems currently faced. 14359/51712265. A total of 15 batches of concrete were prepared and tested for compressive strength, splitting tensile strength, axial compressive strength, elastic modulus The mechanical properties may vary depends on the fiber length, ratio of fiber. William Publication: Materials Journal Volume: 94 Issue: 6 Appears on pages(s): 457-471 Keywords: concretes; cylinders; deformation; loads (forces); specimens; strength; tests; DOI: 10. It is unavoidable that there is a reduction for compressive strength of concrete when it is exposed to high temperature (see Fig. 9, 1. ” Many changes in concrete mechanical properties are observed in comparison to plain concrete by incorporating waste steel scrap from the experimental studies. Both mechanical and electrical properties of this conductive concrete are examined and compared with corresponding measured properties of plain concrete and composites incorporating pure nano-graphite (NG). Concrete is widely used in various structures that are exposed to continuous variations in temperature and moisture content. 1, and SF in fresh concrete and in hardened concrete are shown in Fig. Mechanical properties of the concrete used for the beams were also studied. Author links open overlay panel Chaocan Zheng, Cong Lou, Geng Du, It has been suggested that, although the mechanical properties of recycled aggregate concrete are generally inferior to those of conventional concrete, Ultrasound velocity test on compressive concrete specimens. Mater. Micro polypropylene (PP) fibres are added to concrete to improve its performance under thermal loads such as in case of fire by preventing the phenomena of explosive spalling. FRFC was reinforced with the natural fiber henequen (untreated or alkaline-treated) at volume fractions of 0. This paper presents the results of an experimental study on the mechanical properties of high‐strength concrete in the temperature range between + 20 ° C and -70 ° C (+ 68 ° F and -94 ° F) without considering the effect of freezing cycles. Experimentally measured values of the static elastic modulus, Poisson’s ratio, compressive strength, and flexural strength of GPC specimens made from 25 fly ash (FA) stockpiles from different sources were recorded and analyzed. Assessing the residual mechanical strength of the structural masonry components is essential, following the exposure to high temperatures. Bhavana, CH. It is well known that concrete is a multi-phase heterogeneous brittle material. 6, 0. 1 kg. One such investigation by Nili and Afroughsabet [32] focused on silica fume fiber-reinforced concrete. 4. [50] can well simulate the dynamic mechanical properties of concrete under impact. Although the PET fibers and fine aggregates measured less than 4. However, long steel fibre has more influence on Fiber-reinforced concrete (FRC) is extensively used in diverse structural engineering applications, and its mechanical properties are crucial for designing and evaluating its performance. (Citation 2021) conducted a study to investigate the physical and mechanical properties of concrete that incorporated shredded PET waste as a partial replacement for fine aggregates, ranging from 5% to 20% by volume. For compressive and tensile strength properties, some authors (Etxeberria et al. The influence mechanism of CTWP on the mechanical properties of UHPC was analyzed by pozzolanic activity, CH content, hydration degree, interfacial transition zone (ITZ) and pore structure. Due to the ready availability of its constituent materials, the strength and economy it provides the mechanical properties of concrete along th e first 28 days of maturity. Al-Mansob b , Azmi Ibrahim c , Jing Lin Ng a , Hok Chai Yam d De Brito et al. Google Scholar Adding a certain amount of steel fibers can overcome the brittleness defects in geopolymer concrete and improve the mechanical properties, which has a broader application prospect. In terms of printing technology, various technical routes have been proposed such as spray-based 3D concrete printing [3, 4] and extrusion-based 3D concrete printing [5, 6]. However, this technique still contains several factors that influence the buildability and mechanical properties of the printed concrete. These equations typically are for the elastic modulus and modulus of rupture. 3-14 codes provides simple formulas to calculate the mechanical properties of consolidated concrete. [52] investigated the possibility of strengthening Portland cement foam concrete with CNTs Mechanical properties of concrete containing a high volume of tire–rubber particles[J] Waste management, 28 (12) (2008), pp. Polypropylene fiber reinforcement was also used as On the mechanical properties of concrete containing waste PET particles. Find out how these properties are influenced by the mix proportion of To participate in the vast uses of concrete an engineer must know its properties. , 47 (2013), pp. FRFC was reinforced with the As construction projects in cold regions continue to increase, it has become necessary to understand the performance of concrete at low temperatures. Waste brick powder is used as a cement replacement in three different levels: 5%, 10%, and 15%, and it is tested in concretes with no recycled aggregates Recently, 3D concrete printing has progressed rapidly in the construction industry. 47:2. It is found that the mechanical properties are similar to that of ordinary concrete confined by steel tubes; however its modulus and strength are lower than those of ordinary concrete confined by steel tubes [25]. [13] studied the mechanical properties of polypropylene hybrid fiber reinforced concrete (FRC) and found that its splitting tensile strength, compressive strength and flexural properties were better than those of single FRC. L. 1,2 The production of HSSCC requires different materials and mix proportions compared to normal vibrating concrete (NVC), and therefore, a comprehensive understanding of its mechanical properties is essential. Authors: Kishoare Tamanna. In this work, the mechanical properties of cellulose fiber (CF)-reinforced concrete (CFRC) with four fiber contents (0. Issue: 6. Considering this precedent, the effects of using both residuals in medium strength concretes are analyzed. E. This development is motivated by its physical and mechanical properties which contribute to traditional concrete elements and structures various economical benefits such as structure subtlety, part or full elimination of conventional reinforcement, enhanced impact The mechanical properties of concrete increased with the increase of GP and BP ratios. , and Carrasquillo, R. [18] also investigated the long-term mechanical properties of pervious concrete through fly ash and silica fume and found that the compressive strength at 28, 56, and 120 days was increased by 11. In Fig. Although CNT has been around for more than 30 years, it was not until 2003 that Campillo et al. The inclusion of two or more types of steel fibre in the concrete effectively enhances the properties of the concrete as reported in previous studies. The physical morphology of the SF is shown in Fig. El-Helou, Zachary B. Coventry, G. Test results indicated a reduction in compressive strength, splitting tensile strength, and elastic modulus due to the Brick and concrete are the main materials contributing to demolition and construction waste. 2016: SF/FA ratio: A higher GGBFS/FA (up to 20%) enhances mechanical properties and reduced slump of AACs [116] Pavithra et al. However, the effect of RA quality on the properties of RAC has not been reviewed in much detail. Figs. The compressive strength of the concrete mixture containing 2% fibers was This paper presents a unified calculation method and its application in determining the uniaxial mechanical properties of concrete with concrete strengths ranging from 10 to 140 MPa. This study explores the influence of pre-washed basalt aggreg ates, The objective of this study is to determine the mechanical properties of concrete and compare it with M70 grade of conventional concrete with analytical study. Concrete is composed of approximately 70%–80% aggregates, by volume. For an ideal homogeneous Temperatures elevated above 300 °C (572 °F) degrade the mechanical properties of concrete, including compressive strength, fracture strength, tensile strength, and elastic modulus, with respect to deleterious effect on its structural changes. 68, fineness modulus On the mechanical properties of concrete containing waste PET particles. 18 (a and b), the intensity of CO 2-equivalent emissions per unit volume is determined by the concrete mechanical properties (fc and STS) for each mix. The experimental results indicated that the Information on the mechanical properties of high-strength lightweight concrete up to 100 MPa with a corresponding density of 1865 kg/m 3 is presented. In this paper, 60 cylindrical high-performance concrete (HPC) specimens with different concrete strength grades were cast and subjected to a conventional triaxial experiment to study the mechanical properties of the material. Date: 3/1/2019. 2016: l/b ratio: Mixing design method N. Research on Mechanical Properties of High Performance Concrete. Mechanical properties of concrete containing recycle concrete aggregates and multi-walled carbon nanotubes under static and dynamic stresses Author links open overlay panel Hamzeh Marwan Allujami a , Muyideen Abdulkareem a , Taha M. It is well known that concrete is a porous inhomogeneous material. The composition of concrete plays an important role in controlling its overall performance. Therefore, it is mandatory to investigate the effect of aggregates on the performance of concrete. The mechanical characterization of plain foamed concrete (PFC) and fiber-reinforced foamed concrete (FRFC) with a density of 700 kg/m3 was performed with compression and tension tests. Nowadays, there is a popular solution to replace the cement with supplementary cementitious materials (SCMs) using pozzolanic properties to invent a new type of environmental-friendly green concrete [7]. Strength of concrete are of the following types: Two types of test specimens Mechanical properties of self-compacting steel-fiber-reinforced concrete. Finally, the third class of substitution (i. Laboratory studies were conducted on concrete compressive and splitting tensile strength, modulus of elasticity, and Poisson's ratio and on the local bond strength between concrete and steel under both monotonic and cyclic loadings in the temperature range of 20 °C and -70 ° C. Three different curing regimes were applied, namely, continuous normal water curing (NW), initial water curing for 28 days before exposure to an open air environment (OA), and In this study, the effect of waste glass on the mechanical properties of concrete was examined by conducting a series of compressive strength, splitting tensile strength and flexural strength tests. density, carbonation depth, and chloride ion penetration), mechanical properties (i. Yabin He, Lei Yu, Sheng Chen, Chuankai Yan, Zhansheng Lin An increase in curing time or temperature of enhances mechanical properties of AACs; There is strong correlations between f c and durability properties of AACs [115] Okoye et al. Characterization of Mechanical Properties of Polymer Concrete. 1. Given that the production of high quality RA requires Extensive research conducted on the physical and mechanical properties and durability of concrete containing RCA has consistently found that its density and workability are lower than found in concrete using conventional aggregate (Yang and Kim, 2005, Yang et al. Therefore, to be able to utilize waste-based aggregate concretes The mechanical properties of concrete change significantly in low and ultra-low-temperature environments compared to room temperature [19,20,21,22,23]. Test results indicated that the positive correlation of conventional concrete between the axial compressive strength, elastic modulus, splitting tensile strength, and cubic compressive strength was applicable to F-S concrete irresponsible of the For the other reviewed mechanical properties, the differences between AAC and OPCC largely depend on the proportions of raw materials in the concrete; specifically, the slag to fly ash ratio may be a very influential factor. Compared to the extrusion-based 3D concrete printing, spray-based printed The inclusion of fibers in concrete slabs improves the concrete’s mechanical properties. The mechanical and physical properties of concrete are more complex than most materials as they are impacted by the environmental conditions when it is poured and cured [15]. Concrete is the most widely used construction material. From the results, it was The addition of macro fibers to concrete pavements has been used to improve the cracking of concrete pavement, reduce slab thickness and contribute to increasing the joint spacing. Five different types of lightweight aggregates were investigated, and the strength of the aggregate appears to be the primary factor controlling the strength of the high-strength lightweight Title: Mechanical Properties of Concrete in Uniaxial Compression Author(s): Y. Test results Mechanical properties of recycled concrete with demolished waste concrete aggregate and clay brick aggregate. Yan, Y. Properties of Concrete Different properties of concrete: Grades (M20, M25, M30 etc. Numerous scientific papers were analyzed and carefully examined from the period of 1998 to 2023, which forms the bibliometric core of this study. The mechanical properties of fly-ash-based geopolymer concrete (GPC) were studied. View PDF View article View in Scopus Google Scholar [63] R. Wu [26] performed axial compression tests on . View PDF View article View in Scopus Google Scholar [16] A. This study aims to comprehensively review the addition of SF as an SCM replacement, with a specific focus on the mechanical properties of concrete. Abstract: The objective of the present study is to provide a databank and comprehensible design equations of the mechanical properties of concrete prepared using different expanded lightweight aggregates. According to this aim, waste glass powder (WGP) was first used as a partial replacement for cement and six different ratios of WGP were utilized in concrete The addition of macro fibers to concrete pavements has been used to improve the cracking of concrete pavement, reduce slab thickness and contribute to increasing the joint spacing. Build. The compressive and tensile National Standard for test method of mechanical properties on ordinary concrete (GB/T 50081-2002) stipulates that the cube strength (unit: N/mm 2) of concrete is the compressive strength measured according to the standard test method on standard specimens (150 mm cubes), which have been cured after casting for 28 days in a chamber set at 20 °C Overall, the mechanical properties of concrete using 30% GFNS as SCM together with 50% FNS as fine aggregate were similar to those of control concrete after 56 days of age. 09 Hence, the working properties, mechanical properties, and durability of the concrete can be improved effectively, ensuring that coal gangue concrete meets engineering design requirements. freezing-thawing resistance Currently, it is widely accepted that sulfate erosion of concrete can be classified into two types: physical corrosion and chemical corrosion [4, 5]. This paper aims to study the compressive strength and tensile bond strength of concrete made with full natural aggregate (NA) substitute by RCA Pervious concrete (also called porous concrete) is one of the most promising sustainable and green building materials today. Wang et al. Therefore its resistance of moisture flow of concrete decreases and the number of unhydrated c Concrete’s mechanical properties, including compressive strength, tensile strength, flexural strength, shear strength, durability, elasticity, and creep, collectively determine its Learn about the 10 properties of concrete, such as compressive strength, tensile strength, creep, shrinkage, modular ratio, Poisson's ratio, durability and unit weight. One advantage of concrete is that it contains a number of constituents, so substituting some substances with other admixtures can lead to Nazeer et al. The self-healing concrete specimens were prepared to study the effects of different dosages of SHA on the resulting concrete mechanical properties under different dosages of SHA by the optimal mixing method and particle size of the SHA. A test program was carried out to develop information about the mechanical properties of high-performance concrete. Therefore, this study investigated the effects of the nozzle speed, the interlayer interval time, the rotations per minute (RPMs) of the screw in the 3D However, very little is known regarding its mechanical properties at low temperature. A 15% of waste glass powder was used as a partial substitute for cement, and (10 and 20%) of crushed waste plastic was used as a partial substitute for fine aggregates. Carrasquillo, P. Here in this article, we have provided a glimpse of the properties of concrete. Clearly, establishing relationships of mechanical properties of RAC is a crucial issue for designing and analyzing concrete structures [27]. An experimental program aimed at obtaining material properties and main characteristics of concrete with different contents of steel scrap was performed. 1302-1308. Interlayer bonding strength, a critical factor affecting overall performance, is influenced by printing Experimental investigation on the mechanical properties of concrete utilizing pre-coated Brick-Concrete recycled coarse aggregates. 75 mm in size, they exhibited a wide range of Lai et al. Mixing and curing water was collected from four different water sources. To address this issue, 2. Models and numerical simulations for The most fundamental properties of concrete exposed to elevated temperatures are its mechanical properties. In this paper Reducing the fingerprint of infrastructure has become and is likely to continue to be at the forefront of stakeholders’ interests, including engineers and researchers. The The difference in mechanical properties between F-S concrete and conventional concrete was analyzed. Specifically, these properties of RAC include fresh concrete workability, physical and chemical properties (i. Title: Mechanical Properties of Concrete Materials Reinforced With Polypropylene or Polyethylene Fibers. It necessary that future buildings produce minimal environmental impact during construction and remain durable for as long as practicably possible. [16] reported that the hybridization between long and short steel fibres results in good workability and improves mechanical properties. The incorporation of fibre is an acceptable solution to reduce these limitations. 5%. Technica, Bucauresti, 1971. Lee and K. 14359/329 Date: 11/1/1997 Abstract: Pre- and post-peak response phenomena are Ultra-high-performance concrete (UHPC) is a new class of concrete developed in France in the 1990s with superior characteristics including high workability, high compressive strength, increased By conducting a thorough comparative analysis of the mechanical properties of ordinary river sand concrete and mixed sand concrete, it has been determined that a 50 % aeolian sand content in the mixed sand is the threshold at which the performance of the mixed sand concrete undergoes a significant shift. It can be observed that the CO2-eq intensity This paper examines the mechanical and durability properties of concrete incorporated with treated recycled concrete aggregate (RCA) under different curing conditions. A discussion on short-term mechanical properties of concrete which includes, compressive strength, stress-strain behavior, elastic modulus, Poisson’s ratio, tensile strength and modulus of rupture, is presented here. The global warming potential (GWP) CO 2-eq intensity is defined as a suitable option to evaluate the various effects of the concrete used. ), resulting in the formation of expansive substances that lead to concrete cracking and The disposal method and treatment of waste tyre rubber pose major environmental problems in the new era. 1). This study examined high-strength pervious concrete and ordinary-strength pervious concrete reinforced with steel fiber or glass fiber. Because the mechanical properties of fiber concrete are largely This specificity significantly affects the mechanical properties of concrete on the initiation and propagation of the crack in the least resistant zones in concrete. ” ACI Mater. Motivation of the research. Five dosage gradients were used to study the corresponding effects of SHA dosage on the concrete compressive Desirable mechanical and durability properties of HVFA concrete has been achieved by careful selection of the mix proportions and the utilization of super-plasticizers [13]. The stress-strain behavior for both confined and unconfined concretes were modelled based on constitutive model by Title: Mechanical Properties and Microstructure of Carbon Fiber- Reinforced Nano-Metakaolin Recycled Concrete Author(s): J. The effect of Concrete properties are essential to understanding its durability, strength, and versatility in construction. Both the elastic strain and peak strain at failure increase with the decrease of temperature in the compressive strength tests. H. Various kinds of rocks with higher elasticity and strength can be selected as the aggregate [19, 20], and they usually serve as the skeleton in concretes. 2, and 1. e Among all the types of fibers used to enhance concrete properties, SF is the most widely employed due to its exceptional crack resistance, which significantly improves the mechanical properties and durability of concrete. The experimental results showed that the cement-aggregate interface is the weakest zone in concrete. June 2020; ACI Materials Journal 117(3):169-180; DOI:10. Experimental research was conducted to investigate the replacement ratio and water absorption of fine recycled aggregate (FRA) on the fresh and hardened properties of recycled aggregate concrete (RAC). CNTs have excellent mechanical properties, thermal and electrical conductivity [49], [50]. The reason is that these properties affect concrete’s behavior This paper presents a critical review on the thermal and mechanical properties of concrete and its constituents exposed to a range of elevated temperatures. The compressive, flexural, splitting tensile, and shear strengths of FRCs are among the most important attributes, which have been discussed more extensively than other Mechanical Properties of Rubberized Concrete Containing Recycled Concrete Aggregate. Summarizes results of an experimental investigation of the mechanical properties of high-strength lightweight concrete subject to short-term loads. The equations and formulations that are used for normal strength concrete (NSC) cannot always be extended to include HSC, and FRC is a building material whose utilization in the concrete industry has been rapidly increasing. The performance of recycled aggregate concrete(RAC) was modified largely based on the aggregate type and quality. To facilitate the application of the tree-based models in predicting mechanical properties of manufactured-sand concrete, a graphical user interface has been designed in this study. High-performance concretes with 56-day compr drying; flexural strength; high-performance concrete; high-strength concrete; mechanical properties; modulus of elasticity; Poisson’s ratio; silica fume; size effect; tensile A variety of solid wastes were mixed, and batches of concrete with high mechanical properties and durability were prepared by adjusting the type and amount of cementitious materials used. Chemical corrosion refers to the chemical reaction between sulfate ions and cement hydration products (such as CH, C–S–H, C-A-H, etc. 8% and 40. Natural as well as synthetic fibers are increasingly being used in a variety of industrial applications, including a self-weight decrease in automotive and aerospace, due to their The physical properties of concrete components, including mortar, aggregate, and the ITZ, are listed in Table 2. The identified water sources are easily accessible in the study area. Staple fibers have good fineness and dispersion, whereas monofilament fibers have a high elastic modulus and Title: Mechanical Behavior and Design Properties of Ultra-High- Performance Concrete (Open Source) Author(s): Rafic G. This interactive tool on our website calculates the mechanical properties of consolidated concrete. The The mechanical properties of 3D-printed concrete exhibit significant anisotropy, with the highest strength observed in the printing direction (X-direction) and relatively lower strength perpendicular to the printing direction (Z-direction). The compressive strength, tensile strength, flexural strength, modulus of elasticity, strain at maximum strength, and compressive stress–strain curves of RC are studied. Hsie et al. This paper studied the mechanical properties of textile reinforced concrete (TRC) under chloride wet-dry and freeze-thaw cycles, considering the number of cycles, the coupling effect of bending sustained load and corrosion environment, and adding short-cut fibers into fine grained concrete. Current experimental results have shown that the mechanical and durability properties of concrete are altered due to the inclusion of plastic. All materials used in the mixing of the different concrete series were measured by mass to the nearest 0. Fine aggregate with specific gravity of 2. 14359/51722409. The use of Table 1 shows the mechanical properties of the concrete used in all the models. This article reviews the performance of RC in six aspects, namely working performance, bulk density, water absorption, mechanical properties, durability performance and thermal properties. , 2007, The aim of this paper is to explore the effect of rubber types and rubber content on mechanical properties of concrete. With elevated temperature, concrete will lose its hydration product because of water evaporation. Their findings revealed that the inclusion of fiber and silica fume resulted in improved long The physical properties of these RAs with diverse intrinsic strength and water absorption could affect the interfacial transition zone (ITZ) and mechanical properties of a new concrete differently. Author links open overlay panel Ke Xu a, Peng Deng a b, Pin Huang a c, Alin Xiao d, This study investigates the fundamental mechanical properties, three-point bending properties of notched beams, and uniaxial Concrete is a material with high compressive strength, but predisposed to shrinkage cracking, rapid cracks propagation, and brittle failures. An effective method of enhancing the mechanical properties of concrete is by adding a small fraction of short fibres to it [15–17]. Feng, H. Similar content being viewed by others. 55 % compared to the control group, respectively (comparative results for PC-M3 and PC-M9 groups). Shahidan et al. The dynamic parameters of the rate-dependent constitutive relation of elastic concrete were determined by measuring the velocity histories of spherical waves. However, high cost and energy consumption related to man-made fibres have placed natural fibres as an attractive sustainable alternative, especially Many researchers have worked to improve the mechanical properties of concrete since it is considered to be one of the most cost-efficient construction materials that can be used in various circumstances. Two types of FRA, originating from construction and demolition wastes of concrete structures, were used in this study – FRAL with a lower water This paper presents a comprehensive review of the changes in mechanical properties of concrete at low and ultra-low temperatures and further elucidates the evolution of its compressive strength The present study applies an iron-particle contained composite nano-graphite by-product (ING) to investigate a new type of conductive concrete. Graybeal Publication: Materials Journal Volume: 119 Issue: 1 Appears on pages(s): 181-194 Keywords: compression properties; mechanical models; structural design parameters; tension Concrete curing is one of the critical factors affecting the mechanical and durability properties of concrete (Hamada et al. compressive, flexural, and splitting tensile strength as well as elastic modulus), and long-term performance (i. Environmental-friendly green concrete could be defined as a partial replacement of cement with natural or recyclable materials to reduce environmental damage [8]. Meanwhile, a dynamic constitutive model for concrete considering high-temperature influencing factors is established. Therefore, studying the mechanical properties of HSC under high-velocity impact holds significant reference value for the rational design of protective engineering. Jassam a , Ramez A. Materials and methods. Publication: Materials Journal. Hence, there is wide interest in further increasing the replacement percentage of fly ash. Rambabu (2017) “Study of Mechanical Properties of Lightweight Aggregate Concrete by Using Pumice Stone, Ceramic Tiles and CLC Lightweight Bricks”, International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 04 Issue: 06. Concretes having compressive strengths to 8600 psi (59 MPa) and densities from 90 to 103 pcf (1440 to 1650 kg/m) were tested. Conducting uniaxial compressive tests on non-standard prismatic concrete specimens under low-temperature conditions and analyzing the test results allows for a comprehensive understanding of the However, very little is known regarding its mechanical properties at low temperature. As high-temperature performance is a fundamental property of concrete, the performances of AAC exposed to elevated The deterioration and enhancement mechanisms of the mechanical properties of concrete under high temperature and strain rates were studied by combining the results with static and dynamic mechanical properties analyses. Weng, B Current concrete constitutive models predominantly rely on macroscopic stress-strain relationships derived from overall specimen-level test data. This is attributed to the fact that the pore water inside the concrete freezes at low temperatures, and the degree of freezing is affected by the room temperature, in addition to the free water content and pore This improvement in mechanical properties of concrete is mainly due to both the small size of PET particles and low w / c ratio (that led to a decrease in the amount of bleeding water located around the PET particles), as a result, produced a better bond between cement paste and PET aggregates. [21] emphasized the importance of knowing the properties of aggregates, pointing out that it is unable to accurately estimate the compressive strength of concrete if the properties are ignored. Adding modified materials to coal gangue concrete is a viable future development direction. presented a new method to study the dynamic mechanical properties of concrete under low pressure and a high strain rate via the inversion of spherical wave propagation. , 2022; J. Facaroau, Incercarea Nedistructiva a Betonului ,Ed. “Evaluation of the use of current concrete practice in the production of high-strength concrete. ) Compressive strength; Characteristic Strength However, the use of the developed models for natural aggregate concrete to relate the mechanical properties of waste-based aggregate concrete can be problematic, because the use of waste aggregates affects the concrete mechanical properties due to a variety of factors [80], [81]. Dawood et al. e. By analyzing a large collection of test results of the uniaxial mechanical properties of normal-strength, high-strength and super high-strength concrete in China and performing a Although significant research has been conducted on the dynamic mechanical properties of geopolymer-based concrete or composite using the two-part approach, the construction issues remain unavoidable for practical application. lzrhs nzsk tuctr xtxj utl dfgfqnv mdtl echp nnijxr crnzy