TY - JOUR
T1 - Evaluating the effects of recycled concrete aggregate size and concentration on properties of high-strength sustainable concrete
AU - Sobuz, Md Habibur Rahman
AU - Datta, Shuvo Dip
AU - Akid, Abu Sayed Mohammad
AU - Tam, Vivian W.Y.
AU - Islam, Shoaib
AU - Rana, Md Jewel
AU - Aslani, Farhad
AU - Yalçınkaya, Çağlar
AU - Sutan, Norsuzailina Mohamed
N1 - Funding Information:
The authors wish to thank the Structural and Material Engineering Laboratory technicians in the Department of Building Engineering and Construction Management at Khulna University of Engineering and Technology, Khulna – 9203, Bangladesh, for overall support in specimen preparation and fabrication and testing period. This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.
Publisher Copyright:
© 2022 The Authors
PY - 2024/6/8
Y1 - 2024/6/8
N2 - This paper studies the fresh and mechanical properties of high-strength concrete (HSC) by incorporating recycled concrete aggregates (RCA) of varying sizes and concentrations. The recycled aggregate concrete (RAC) was prepared by partially replacing RCA with natural coarse aggregate (NCA) at 0%, 15%, 30%, and 45%, with aggregate sizes ranging from 5 to 12 and 12–20-mm. Fresh concrete properties, such as slump, Kelly ball, compacting factor, K-slump, and fresh density, were tested to determine the influence of RCA size and concentration. In addition, the mechanical properties were studied through the execution of compressive, split-tensile, and stress-strain tests. The test results revealed that increasing the RCA concentration declines the fresh and hardened properties of HSC. In the fresh concrete experimentation, the 12–20 mm aggregate size RAC mixes exhibited greater workability than the 5–12 mm aggregate mixes. On the contrary, 5–12 mm aggregate mixes RAC had higher compressive and split-tensile strength and a higher modulus of elasticity than 12–20 mm aggregate mixes concrete. When it comes to sustainability, the study found that the smaller size range of RAC produces inferior embodied CO2 (eCO2) and provides a cost-effective and sustainable solution for the construction industry.
AB - This paper studies the fresh and mechanical properties of high-strength concrete (HSC) by incorporating recycled concrete aggregates (RCA) of varying sizes and concentrations. The recycled aggregate concrete (RAC) was prepared by partially replacing RCA with natural coarse aggregate (NCA) at 0%, 15%, 30%, and 45%, with aggregate sizes ranging from 5 to 12 and 12–20-mm. Fresh concrete properties, such as slump, Kelly ball, compacting factor, K-slump, and fresh density, were tested to determine the influence of RCA size and concentration. In addition, the mechanical properties were studied through the execution of compressive, split-tensile, and stress-strain tests. The test results revealed that increasing the RCA concentration declines the fresh and hardened properties of HSC. In the fresh concrete experimentation, the 12–20 mm aggregate size RAC mixes exhibited greater workability than the 5–12 mm aggregate mixes. On the contrary, 5–12 mm aggregate mixes RAC had higher compressive and split-tensile strength and a higher modulus of elasticity than 12–20 mm aggregate mixes concrete. When it comes to sustainability, the study found that the smaller size range of RAC produces inferior embodied CO2 (eCO2) and provides a cost-effective and sustainable solution for the construction industry.
KW - Fresh properties
KW - High strength concrete
KW - Mechanical properties
KW - Recycled aggregate concrete
KW - Recycled concrete aggregate
KW - Sustainability
UR - http://www.scopus.com/inward/record.url?scp=85132243264&partnerID=8YFLogxK
U2 - 10.1016/j.jksues.2022.04.004
DO - 10.1016/j.jksues.2022.04.004
M3 - Article
AN - SCOPUS:85132243264
SN - 1018-3639
VL - 36
SP - 216
EP - 227
JO - Journal of King Saud University - Engineering Sciences
JF - Journal of King Saud University - Engineering Sciences
IS - 3
ER -
