TY - JOUR
T1 - Investigation of thermal performance of concrete incorporating different types of recycled coarse aggregates
AU - Kazmi, Syed Minhaj Saleem
AU - Munir, Muhammad Junaid
AU - Wu, Yu Fei
AU - Lin, Xiaoshan
AU - Ahmad, Muhammad Riaz
N1 - Funding Information:
The technical and financial support provided by Shenzhen University, RMIT University, and Shanghai Jiao Tong University during this work is highly acknowledged. This study was supported by the Victoria-Jiangsu Program for Technology and Innovation R&D by the Department of Economic Development, Jobs, Transport and Resources, the state of Victoria, Australia, and the Australian Research Council discovery grant DP200100631. Furthermore, the authors also acknowledge the support of Master students (Yanxiang Ta, Guantao Hu, Yanchao Yue, Zheng Shuyue, Xiaojuan Fuji, Qianli Zhong, Wenlong He, Yuhao Ren, Heng Gao, Bin Xi, and others) and laboratory staff of Shenzhen University.
Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2021/2/8
Y1 - 2021/2/8
N2 - To adopt sustainability in the construction industry, various nations around the globe are focusing on the utilization of recycled aggregate concrete (RAC). The thermal performance of RAC incorporating different types of recycled coarse aggregates (RCA) is unexplored in the current literature. In this study, the thermal performance of RAC incorporating RCA treated through different techniques including accelerated carbonation, soaking in lime with accelerated carbonation, soaking in acetic acid, soaking in acetic acid with rubbing, and soaking in acetic acid with accelerated carbonation is explored. Furthermore, dry density, compressive strength, water absorption, the volume of permeable pores, porosity, and pore size distribution of all the concrete specimens are also investigated. The thermal conductivity of RAC specimens is observed 27% lower than natural aggregate concrete (NAC) specimens. An increase in thermal conductivity is observed for RAC specimens incorporating treated RCA than RAC specimens with untreated RCA. However, the thermal conductivity values of RAC specimens with treated RCA are still observed lower than NAC specimens. A relationship is also developed by regression analysis of the test database to predict the thermal conductivity of RAC. The proposed relation can effectively predict the thermal conductivity of RAC incorporating untreated and treated RCA leading towards the development of guidelines for sustainable construction.
AB - To adopt sustainability in the construction industry, various nations around the globe are focusing on the utilization of recycled aggregate concrete (RAC). The thermal performance of RAC incorporating different types of recycled coarse aggregates (RCA) is unexplored in the current literature. In this study, the thermal performance of RAC incorporating RCA treated through different techniques including accelerated carbonation, soaking in lime with accelerated carbonation, soaking in acetic acid, soaking in acetic acid with rubbing, and soaking in acetic acid with accelerated carbonation is explored. Furthermore, dry density, compressive strength, water absorption, the volume of permeable pores, porosity, and pore size distribution of all the concrete specimens are also investigated. The thermal conductivity of RAC specimens is observed 27% lower than natural aggregate concrete (NAC) specimens. An increase in thermal conductivity is observed for RAC specimens incorporating treated RCA than RAC specimens with untreated RCA. However, the thermal conductivity values of RAC specimens with treated RCA are still observed lower than NAC specimens. A relationship is also developed by regression analysis of the test database to predict the thermal conductivity of RAC. The proposed relation can effectively predict the thermal conductivity of RAC incorporating untreated and treated RCA leading towards the development of guidelines for sustainable construction.
KW - Dry density
KW - Recycled aggregate concrete
KW - Recycled coarse aggregates
KW - Thermal performance
KW - Treated recycled coarse aggregates
UR - http://www.scopus.com/inward/record.url?scp=85095590341&partnerID=8YFLogxK
U2 - 10.1016/j.conbuildmat.2020.121433
DO - 10.1016/j.conbuildmat.2020.121433
M3 - Journal article
AN - SCOPUS:85095590341
SN - 0950-0618
VL - 270
JO - Construction and Building Materials
JF - Construction and Building Materials
M1 - 121433
ER -