TY - GEN
T1 - Low Carbon Recycled Aggregate Concrete
T2 - 8th Zero Energy Mass Custom Home International Conference 2021
AU - Mouna, Yara
AU - Batikha, Mustafa
AU - Suryanto, Benny
N1 - Funding Information:
The authors wish to acknowledge the support of Bee'ah company in Sharjah and Geoscience laboratory in Dubai. The first author also acknowledges the financial support (fee-waiver) provided by Heriot-Watt University.
Publisher Copyright:
© 2021 by the authors. Submitted for possible open access publication under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
PY - 2021
Y1 - 2021
N2 - Recycled coarse aggregate from construction demolition waste offers a promising and sustainable solution to overcome challenges facing the construction industry, in relation to the increasing landfill areas, decreasing natural aggregate reserves, and increasing environmental impact of concrete production. Previous studies have shown that recycled aggregate concretes (RAC) are, however, more susceptible to deterioration. This paper presents an experimental investigation to improve the performance of concretes manufactured with locally produced recycled coarse aggregate in the UAE. More specifically, it aims to investigate the potential of incorporating ground granulated blast-furnace slag (GGBS) and silica fume (SF) in RACs, and their influence on key engineering properties of concrete. It is shown that partial replacement of Portland cement with GGBS and SF is effective to reduce the resistance of RAC to chloride ion penetration (hence durability), and lower the drying shrinkage and CO2 emissions, with minimal influence on the long-term mechanical properties. A reduction of approximately 40% in CO2 emissions was found in a concrete mix with combined replacement of recycled and waste materials.
AB - Recycled coarse aggregate from construction demolition waste offers a promising and sustainable solution to overcome challenges facing the construction industry, in relation to the increasing landfill areas, decreasing natural aggregate reserves, and increasing environmental impact of concrete production. Previous studies have shown that recycled aggregate concretes (RAC) are, however, more susceptible to deterioration. This paper presents an experimental investigation to improve the performance of concretes manufactured with locally produced recycled coarse aggregate in the UAE. More specifically, it aims to investigate the potential of incorporating ground granulated blast-furnace slag (GGBS) and silica fume (SF) in RACs, and their influence on key engineering properties of concrete. It is shown that partial replacement of Portland cement with GGBS and SF is effective to reduce the resistance of RAC to chloride ion penetration (hence durability), and lower the drying shrinkage and CO2 emissions, with minimal influence on the long-term mechanical properties. A reduction of approximately 40% in CO2 emissions was found in a concrete mix with combined replacement of recycled and waste materials.
KW - CO2 emission
KW - Durability
KW - GGBS
KW - Recycled coarse aggregate
KW - Silica fume
UR - http://www.scopus.com/inward/record.url?scp=85125815699&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85125815699
T3 - ZEMCH International Conference
SP - 1063
EP - 1074
BT - 8th Zero Energy Mass Custom Home International Conference 2021
A2 - Tabet Aoul, Kheira Anissa
A2 - Shafiq, Mohammed Tariq
A2 - Attoye, Daniel Efurosibina
PB - ZEMCH Network
Y2 - 26 October 2021 through 28 October 2021
ER -
