TY - JOUR
T1 - Artificial alkali-activated aggregates developed from wastes and by-products
T2 - A state-of-the-art review
AU - Qian, Lan Ping
AU - Xu, Ling Yu
AU - Alrefaei, Yazan
AU - Wang, Tiao
AU - Ishida, Tetsuya
AU - Dai, Jian Guo
N1 - Funding Information:
The authors would like to acknowledge the financial support received from NSFC/RGC Joint Research Scheme (N_PolyU542/20), The Hong Kong Polytechnic University through the Research Institute for Sustainable Urban Development (No.1-BBWE), Kijima International Joint Research Fund (2021), and the Hong Kong Polytechnic University Ph.D. studentship awarded to the first and second authors.
Publisher Copyright:
© 2021
PY - 2022/2
Y1 - 2022/2
N2 - Natural resources depletion is gradually becoming a critical burden on the environmental and ecological balance, pushing the development of artificial aggregates forward. In order to curb the shortage issues of natural aggregates and minimize the destruction of land topography, alkali-activated aggregates (AAA) have gradually become a hot topic in recent years as a new application of alkali-activated materials (AAM) with the benefits of utilizing industrial by-products and waste materials. This article provides an overall review of the manufacturing process and engineering properties of two types of artificial aggregates, cold-bonded AAA (CB-AAA) and sintered AAA (ST-AAA). Their applications in concrete, besides the mechanical evaluation, durability performance, and leaching behavior, are summarized based on the existing research outcomes. Finally, the future perspectives and challenges of artificial aggregates development are also proposed.
AB - Natural resources depletion is gradually becoming a critical burden on the environmental and ecological balance, pushing the development of artificial aggregates forward. In order to curb the shortage issues of natural aggregates and minimize the destruction of land topography, alkali-activated aggregates (AAA) have gradually become a hot topic in recent years as a new application of alkali-activated materials (AAM) with the benefits of utilizing industrial by-products and waste materials. This article provides an overall review of the manufacturing process and engineering properties of two types of artificial aggregates, cold-bonded AAA (CB-AAA) and sintered AAA (ST-AAA). Their applications in concrete, besides the mechanical evaluation, durability performance, and leaching behavior, are summarized based on the existing research outcomes. Finally, the future perspectives and challenges of artificial aggregates development are also proposed.
KW - Alkali-activated aggregates (AAA)
KW - Alkali-activated materials (AAM)
KW - Durability
KW - Geopolymer
KW - Mechanical properties
KW - Waste
UR - http://www.scopus.com/inward/record.url?scp=85120954528&partnerID=8YFLogxK
U2 - 10.1016/j.resconrec.2021.105971
DO - 10.1016/j.resconrec.2021.105971
M3 - Review article
AN - SCOPUS:85120954528
SN - 0921-3449
VL - 177
JO - Resources, Conservation and Recycling
JF - Resources, Conservation and Recycling
M1 - 105971
ER -