Artificial alkali-activated aggregates developed from wastes and by-products: A state-of-the-art review

Lan-Ping Qian; Ling-Yu Xu; Yazan Alrefaei; Tiao Wang; Tetsuya Ishida; Jian-Guo Dai

doi:10.1016/j.resconrec.2021.105971

Artificial alkali-activated aggregates developed from wastes and by-products: A state-of-the-art review

Lan-Ping Qian
, Ling-Yu Xu
, Yazan Alrefaei^*
, Tiao Wang
, Tetsuya Ishida
, Jian-Guo Dai^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

138 Citations (Scopus)

Abstract

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. © 2021 Elsevier B.V.

Original language	English
Article number	105971
Journal	Resources, Conservation and Recycling
Volume	177
Online published	22 Oct 2021
DOIs	https://doi.org/10.1016/j.resconrec.2021.105971
Publication status	Published - Feb 2022
Externally published	Yes

Funding

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.

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 9 Industry, Innovation, and Infrastructure

Research Keywords

Alkali-activated aggregates (AAA)
Alkali-activated materials (AAM)
Durability
Geopolymer
Mechanical properties
Waste

RGC Funding Information

RGC-funded

Policy Impact

Cited in Policy Documents

Access Output

10.1016/j.resconrec.2021.105971

Other Access Options

Check CityUHK Library

Permanent Link

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Cite this

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title = "Artificial alkali-activated aggregates developed from wastes and by-products: A state-of-the-art review",

abstract = "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. {\textcopyright} 2021 Elsevier B.V.",

keywords = "Alkali-activated aggregates (AAA), Alkali-activated materials (AAM), Durability, Geopolymer, Mechanical properties, Waste",

author = "Lan-Ping Qian and Ling-Yu Xu and Yazan Alrefaei and Tiao Wang and Tetsuya Ishida and Jian-Guo Dai",

year = "2022",

month = feb,

doi = "10.1016/j.resconrec.2021.105971",

language = "English",

volume = "177",

journal = "Resources, Conservation and Recycling",

issn = "0921-3449",

publisher = "Elsevier B.V.",

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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

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. © 2021 Elsevier B.V.

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. © 2021 Elsevier B.V.

KW - Alkali-activated aggregates (AAA)

KW - Alkali-activated materials (AAM)

KW - Durability

KW - Geopolymer

KW - Mechanical properties

KW - Waste

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U2 - 10.1016/j.resconrec.2021.105971

DO - 10.1016/j.resconrec.2021.105971

M3 - RGC 21 - Publication in refereed journal

AN - SCOPUS:85120954528

SN - 0921-3449

VL - 177

JO - Resources, Conservation and Recycling

JF - Resources, Conservation and Recycling

M1 - 105971

ER -

Artificial alkali-activated aggregates developed from wastes and by-products: A state-of-the-art review

Abstract

Funding

UN SDGs

Research Keywords

RGC Funding Information

Policy Impact

Access Output

Other Access Options

Permanent Link

Other Files and Links

Fingerprint

NSFC: Research and Development on Waste Ash/Slag-based Artificial Aggregates for Applications in Concrete

Cite this

Artificial alkali-activated aggregates developed from wastes and by-products: A state-of-the-art review

Abstract

Funding

UN SDGs

Research Keywords

RGC Funding Information

Policy Impact

Access Output

Other Access Options

Permanent Link

Other Files and Links

Fingerprint

Projects

NSFC: Research and Development on Waste Ash/Slag-based Artificial Aggregates for Applications in Concrete

Cite this