TY - JOUR
T1 - Utilization of CO2 cured CSW-MSWIBA cold bonded aggregate into lightweight concrete products for masonry units
AU - Yaphary, Yohannes L.
AU - Lu, Jian Xin
AU - Zhao, Bin
AU - Cheng, Hiu Wun
AU - Shen, Peiliang
AU - Xuan, Dongxing
AU - Poon, Chi Sun
N1 - Funding Information:
The authors wish to thank the Innovation and Technology Support Programme (ITS-002-17FP), the Hong Kong Research Grants Council (PolyU 15223517) and the Hong Kong Polytechnic University for funding support. Dr. Yohannes Lim Yaphary would express a special acknowledgment to Ms. Dorothy Chan and Mr. C.S. Liu for their sincere instrumental support.
Publisher Copyright:
© 2021 Elsevier Ltd
Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2021/3/22
Y1 - 2021/3/22
N2 - Cold bonded aggregate (CBA) produced principally with concrete slurry waste (CSW) and municipal solid waste incinerator bottom ash (MSWIBA) was used to produce lightweight concretes products – precast masonry units (LWCMU). The properties of the concrete products prepared with the 100% coarse CBA and different fractions of mixed fine CBA and hollow glass granulates (HGG) were compared to produce CBA-LWCMU. The tested properties included dry bulk density, compressive strength, absorption, drying shrinkage and thermal conductivity. It is found that CBA-LWCMU can meet the requirement of non-loadbearing and loadbearing LWCMU as per ASTM C129 and C90, respectively. The advantages of using CBA-LWCMU (i.e., as compared to LWCMU made with sintered expanded clay aggregate) include lower cost and thermal conductivity. The thermal conductivity of CBA-LWCMU can lead to better thermal insulation and passive fire protection of masonry. Furthermore, it was discovered from thermogravimetric analysis (TGA) and mercury intrusion porosimetry (MIP) tests that heated HGG (i.e., as compared to CBA) has better thermal stability and its apparent density was increased after being heated. These advantageous characteristics of HGG can lead to the improved fire resistance of CBA-LWCMU exposed to the elevated temperature.
AB - Cold bonded aggregate (CBA) produced principally with concrete slurry waste (CSW) and municipal solid waste incinerator bottom ash (MSWIBA) was used to produce lightweight concretes products – precast masonry units (LWCMU). The properties of the concrete products prepared with the 100% coarse CBA and different fractions of mixed fine CBA and hollow glass granulates (HGG) were compared to produce CBA-LWCMU. The tested properties included dry bulk density, compressive strength, absorption, drying shrinkage and thermal conductivity. It is found that CBA-LWCMU can meet the requirement of non-loadbearing and loadbearing LWCMU as per ASTM C129 and C90, respectively. The advantages of using CBA-LWCMU (i.e., as compared to LWCMU made with sintered expanded clay aggregate) include lower cost and thermal conductivity. The thermal conductivity of CBA-LWCMU can lead to better thermal insulation and passive fire protection of masonry. Furthermore, it was discovered from thermogravimetric analysis (TGA) and mercury intrusion porosimetry (MIP) tests that heated HGG (i.e., as compared to CBA) has better thermal stability and its apparent density was increased after being heated. These advantageous characteristics of HGG can lead to the improved fire resistance of CBA-LWCMU exposed to the elevated temperature.
KW - Cold bonded aggregate
KW - Lightweight concrete masonry unit
KW - Municipal solid waste incinerator bottom ash
KW - Thermal conductivity
UR - http://www.scopus.com/inward/record.url?scp=85099199768&partnerID=8YFLogxK
U2 - 10.1016/j.conbuildmat.2020.122203
DO - 10.1016/j.conbuildmat.2020.122203
M3 - Journal article
AN - SCOPUS:85099199768
SN - 0950-0618
VL - 276
JO - Construction and Building Materials
JF - Construction and Building Materials
M1 - 122203
ER -
