Modulus of elasticity of recycled aggregate concrete

Abstract

Various empirical equations have previously been suggested for estimating the modulus of elasticity of concrete from its compressive strength. In addition, a considerable number of practical and universal equations have been proposed for predicting the modulus of elasticity when the product includes coarse aggregates and various types of mineral additions. However, such equations are not applicable to the whole data for recycled aggregate concrete because its mechanical properties depend greatly on both the type of aggregates recycled and the ratio of the mix proportions within such concrete. In this study, more than 1300 experimental data obtained from studies performed between 1980 and 2012 in Japan and Korea were used to statistically analyse the relationship between compressive strength and modulus of elasticity. 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.

Recycled concrete with coarse recycled aggregate. An overview and analysis

“…Different authors (31,32) analysed the relationship between the cube compressive strength (f cu ) 0 10 20 30 40 50 60 70 80 90 …”

Experimental Study on Deformation Performance of Basalt Fiber - Reinforced Recycled Aggregate Concrete

“…The results show that the compressive and splitting tensile strength of RAC depends on the mix proportions [18]. Noguchi et al used statistical data from 1,300 tests conducted in Japan and South Korea from 1980 to 2012 to analyze the relationship between compressive strength and elastic modulus [19]. In the triaxial static compression performance of RAC, Chen et al found that the aging time and the lateral constraint have great influence on the peak strain and the elastic modulus of the RAC [20].…”

Elastic modulus of concrete made with recycled aggregates

“…From the 43 publications of a review nature, two groups were created based on the origin of the information & group 1: established organisations, codes and proposed specifications (as listed in Table 1) & group 2: individual researchers (Agrela et al, 2013;Ajdukiewicz, 2005;Balazs et al, 2008;Behera et al, 2014;de Brito and Alves, 2010;de Brito and Robles, 2010;Dhir et al, 2011;Franklin and Gumede, 2014;Kukadia et al, 2014;Li, 2008aLi, , 2008bMarinkovic et al, 2012;McNeil and Kang, 2013;Nixon, 1978;Park et al, 2015;Poon et al, 2003;Ramachandran, 1981;Rao et al, 2007;Safiuddin et al 2013;Safiuddin et al, 2011;Xiao et al, 2006aXiao et al, , 2012aXiao et al, , 2012b.…”