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Oct 15, 2016 The determination of the parameters of concrete i.e., elasticity modulus and tensile strength is a crucial task in material engineering. For this purpose, structural codes propose some empirical formulas to estimate the parameters of materials and are useful for designers rather than the experimental process. However, the estimated results usually vary for different standards.
Discover MoreFor concrete with cylinder compressive strengths between 25 and 30 MPa, the modulus of elasticity of recycled aggregate concrete was only 3 lower than that of normal aggregate concrete. The trends in the development of compressive and shear strength and the strain at peak stress in RA concrete were similar to those in natural aggregate concrete.
Discover MoreOther mechanical properties such as modulus of elasticity, modulus of rupture, and splitting tensile strength and long termdurability test results from the study can be obtained from the open access article. References 1 Ghosn S., Hamad B. 2020 Durability Evaluation of Hemp Fibers and Recycled Aggregates Concrete.
Discover MoreThe RAC incorporates recycled coarse aggregate RCA originated from crushing construction and demolition waste. The investigated parameters were RCA and MK contents. Tests of workability and mechanical properties such as compressive strength, splitting tensile strength, flexural strength, and modulus of elasticity were conducted to evaluate ...
Discover MoreSeeking aggregates for concrete and to dispose of the waste from various commodities is the present concern. Today sustainability has got top priority in construction industry. In the present study the recycled plastics were used to prepare the coarse aggregates thereby providing a sustainable option to deal with the plastic waste 10.
Discover MoreMar 29, 2013 Improvement of tensile strength with the addition of RCA would usually be associated with an improved elasticity however, because the recycled aggregates are more prone to deformation than raw aggregates, the weakness of the aggregate reduces the Youngs modulus for concrete when RCA is used Exteberria et al. 2007. Generally, Young ...
Discover MoreRecycled aggregates and recycled aggregate concrete second state-of-the-art report developments 19451985. Materials and structures, 1986. Bear Bluos. Download PDF. Download Full PDF Package. This paper. A short summary of this paper. 37 Full PDFs related to this paper. READ PAPER.
Discover MoreThe main factor affecting the RCA concrete modulus of elasticity is the modulus of elasticity for the aggregate itself. Improvement of tensile strength with the addition of RCA would usually be associated with an improved elasticity however, because the recycled aggregates are more prone to deformation than raw aggregates, the ...
Discover More1.2.2 Recycled Aggregates ... made from natural aggregate at equal water to cement ratio RCA concrete has similar flexural strength but lower elastic modulus than control. RCA also resulted in higher drying shrinkage and creep but comparable expansion to control. The adherence of mortar to the surface of RCA was the main cause of higher water ...
Discover MoreNov 16, 2014 PROPERTIES OF RECYCLED CONCRETE Less Specific gravity. High Water absorption. Less Bulk density. Relatively less Compressive strength. Less Modulus of elasticity of 15 from natural aggregate. Flexural strength 0.95 7.2MPa. Splitting tensile strength 0.3 3.1MPa. 6.
Discover MoreFirstly, the book presents key findings on the micro- and meso-structure of recycled aggregate concrete RAC, while the second part focuses on the mechanical properties of RAC the strength, elastic modulus, Poissons ratio, stress-strain curve, etc.
Discover MoreAug 26, 2014 Recycled aggregate concretes had lower elastic modulus, splitting and flexural tensile strength than normal aggregate one. The strainstress curves under uniaxial compression show that the post-cracking branch is more spread out compared to NAC. In addition, the peak-strain increases by increasing the replacement ratio.
Discover MoreThe use of recycled aggregate, in general terms, causes a reduction in concrete strength Poon, Shui, Lam, Fok, amp Kou, 2004 and elastic modulus, larger creep, and shrinkage deformations Domingo-Cabo et al., 2009, as well as higher permeability of the concrete G mez-Sober n, 2002. In sum, concrete produced with RCA is generally of lower quality than natural concrete.
Discover MoreFeb 20, 2020 With different aggregate treatment methods, both the dynamic elastic modulus and the compressive strength of the recycled concrete had similar trends. 3 Compared with N-RC, the chloride ion migration coefficient of C-RC, CH-RC, W-RC, and RW-RC decreased by 3.115.3, 9.426.0, 15.532.5 and 24.437.7, respectively.
Discover MoreAug 23, 2019 The compressive strength of recycled aggregate concrete was found to range between 18 and 65 MPa, and therefore a prediction equation is proposed for recycled aggregate concrete that considers the ratio and types of recycled coarse aggregates used.
Discover MoreA global literature search, in the English medium, on the modulus of elasticity of concrete made with recycled aggregates revealed coarse recycled concrete aggregate RCA to be most widely ...
Discover MoreJun 11, 2015 Modulus of elasticity of recycled aggregate concrete Open PDF. Magazine of Concrete Research. ISSN 0024-9831 E-ISSN 1751-763X. Volume 67 Issue 11, June 2015, pp. 585-591. Themed issue on recycled secondary aggregates Prev Next Modulus of elasticity of recycled aggregate
Discover MoreJun 11, 2015 The compressive strength of recycled aggregate concrete was found to range between 18 and 65 MPa, and therefore a prediction equation is proposed for recycled aggregate concrete that considers the ratio and types of recycled coarse aggregates used.
Discover MoreThe compressive strength of recycled aggregate concrete was found to range between 18 and 65 MPa, and therefore a prediction equation is proposed for recycled aggregate concrete that considers the...
Discover MoreDec 01, 2017 The effects of SF on the compressive strength, tensile strength and elastic modulus of recycled aggregate concrete containing slag at early ages 3 and 7 days as well as at long-term 28, 56 and 91 days are shown in Fig. 4, Fig. 5, Fig. 6, respectively.In the same figures the above mechanical properties of concrete containing 50 RCA as partial replacement of natural coarse aggregates and ...
Discover MoreModulus of elasticity MOE is one of the main factors that affect the deformation characteristics and serviceability of concrete in the hardened state. The use of recycled concrete aggregate RCA in concrete production can lead to a significant reduction in the MOE. An artificial neural network ANN was employed to quantify the
Discover MoreSep 30, 2015 In general, when compared at the same w c, concrete with recycled aggregate will develop compressive strength that can be up to 25 lower than the strength of concrete with natural aggregate. With regard to modulus of elasticity, the reduction can be up to 45 14, 15.
Discover Morethe modulus of elasticity, as well as the proposal of a simple approach to predict the perfor-mance of RAC, and thus facilitate its use in construction applications. 3 Recycled aggregates from construction and demolition wastes suitable for the pro-duction of structural concrete
Discover MoreThe effects of recycled aggregate on the modulus of elastically of concrete using statistical analysis of data available in the literature was investigated by 10, the following observations are ...
Discover MoreThis paper reports the influence of the percentage of recycled aggregate RCA from construction and demolition waste CampDW together with the percentage of binder L, curing time t and temperature T of the samples on the stiffness of a hot asphalt mixture. The study was carried out using the response surface methodology RSM. The resilient modulus was chosen to estimate the stiffness of ...
Discover MoreThe noticeable finding in this research, which used the Marshall Mix design method, was the fact that it is possible to use recycled concrete materials in HMA.Other research work done on RCA has shown that except for air voids, all the volumetric properties of an RCA-based HMA, the resilient modulus, and creep values were lower for the RCA HMA ...
Discover MoreThe most common recycled construction materials used as unbound base course in pavement construction are recycled concrete aggregate RCA and recycled asphalt pavement RAP. This study investigated the mechanical properties of RCA and RAP as unbound base, including the relationships between resilient modulus Mr and composition e.g ...
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