Assessment of Reinforced Recycling Aggregate Concrete Beams Under Torsional Moment

Abstract

The recycling of aggregate concrete (RAC) is the ideal solution for reducing the natural resources. The experimental works have been carried out to investigate the torsional moment behavior and the strength of RAC beams in comparison with those beams consisting of natural aggregate concrete (NAC). Nine beams were casted with different compression strengths of concrete (25, 45, and 70 MPa), and coarse RAC of three different percentages within the full bloc of coarse aggregate in concrete mixes (0, 50, and 100%), with the same reinforcement ratio. The properties of the concrete comprised of recycled and natural aggregates were investigated. The results showed, that the difference in the torque of first crack is less than 12.5% for RAC and NAC beams, while the difference in ultimate torque is less than 7.7% for RAC and NAC. Also, it can be conclude that, the torsional moment performance of RAC beams is acceptable as compared to the conduct of NAC beams and the use of RAC is practically possible

Effect of Replacement Ratio on Torsional Behaviour of Recycled Aggregate Concrete Beams

“…The modulus of elasticity of RAC experiences strain when compressed and resulting in an inferior modulus of elasticity i.e. 6.79 % for B-R100 than B-R00, same observations were found in literature [4,16].…”

“…Because RAC has an inferior elastic modulus than NAC and the twist angle of beams at every loading state increases as the ratio of RCA was increased. Similar torsional behaviour was mentioned `in the experimental work [4,5]. Table 5 summarized data when RCA grows, the cracking torque to ultimate torque capacity decreases.…”

“…13.93 %, as shown in Table 3. In the majority of circumstances, it was expected that the mechanical qualities of RAC would be inferior to those of conventional concrete as found in the literature [4,5]. RAC with 100 % RCA had low mechanical properties because the aggregate-cement paste bond broke down.…”

“…*Corresponding Author Institutional Email: nsmasne@gmail.com (N. Masne) In seismic torsion, RAC beams fail similar to regular concrete beams [2,3]. According to Sarsam et al [4], the application of RCA in RAC is nearly conceivable in torsionally loaded structural elements. The analytical (ATENA-3D) and experimental study showed that altering RCA does not degrade pure torsional behaviour of RAC solid beams and the utilization of RAC in structural applications has become an essential aspect [5,6].…”

“…The research work related to reducing carbon emissions mention that, the globe moves toward sustainable sources and the research toward innovation with new technologies should be transparent and acceptable at large scale [22,23]. Except the investigation by Sarsam et al [4], and Masne et al [6] no test data on the torsional behaviour of RAC beams is available in literature. The current study was conducted to bridge this gap.…”