Use of CO2 curing to enhance the properties of cold bonded lightweight aggregates (CBLAs) produced with concrete slurry waste (CSW) and fine incineration bottom ash (IBA)

Pei Tang; Dongxing Xuan; Hiu Wun Cheng; Chi Sun Poon; Daniel C.W. Tsang

doi:10.1016/j.jhazmat.2019.120951

Use of CO₂ curing to enhance the properties of cold bonded lightweight aggregates (CBLAs) produced with concrete slurry waste (CSW) and fine incineration bottom ash (IBA)

Pei Tang, Dongxing Xuan, Hiu Wun Cheng, Chi Sun Poon, Daniel C.W. Tsang

Research output: Journal article publication › Journal article › Academic research › peer-review

105 Citations (Scopus)

Abstract

In this study, concrete slurry waste (CSW) obtained from ready-mixed concrete plants was recycled as a fresh cementitious binder and used together with municipal solid waste incineration (MSWI) fine bottom ash (IBA) from waste-to-energy plants to produce cold bonded lightweight aggregates (CBLAs) by using a pelletizing technique. The influence of different curing methods on the properties of the produced CBLAs were experimentally investigated, including moist curing, steam curing, and accelerated CO₂ curing at 0.1 bar and flow-through CO₂ curing under ambient pressure. The results showed that CBLAs obtained by steam curing at 60 °C had the highest pellet strength, and the CO₂ cured samples had the lowest water absorption values. CO₂ curing with a pressure of 0.1 bar promoted a better pellet strength. The CO₂ curing method can sequestrate 3.5–4.1% (by mass of pellets) of CO₂, which can serve as a sustainable CO₂ sequestration process to produce CBLAs.

Original language	English
Article number	120951
Journal	Journal of Hazardous Materials
Volume	381
DOIs	https://doi.org/10.1016/j.jhazmat.2019.120951
Publication status	Published - 5 Jan 2020

Keywords

Accelerated CO curing
Cold bonded lightweight aggregates
Integral recycling
Solid wastes

ASJC Scopus subject areas

Environmental Engineering
Environmental Chemistry
Waste Management and Disposal
Pollution
Health, Toxicology and Mutagenesis

UN SDGs

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

More information

10.1016/j.jhazmat.2019.120951

Cite this

@article{3808d0a9e3a24dd9b23887a941b734eb,

title = "Use of CO2 curing to enhance the properties of cold bonded lightweight aggregates (CBLAs) produced with concrete slurry waste (CSW) and fine incineration bottom ash (IBA)",

abstract = "In this study, concrete slurry waste (CSW) obtained from ready-mixed concrete plants was recycled as a fresh cementitious binder and used together with municipal solid waste incineration (MSWI) fine bottom ash (IBA) from waste-to-energy plants to produce cold bonded lightweight aggregates (CBLAs) by using a pelletizing technique. The influence of different curing methods on the properties of the produced CBLAs were experimentally investigated, including moist curing, steam curing, and accelerated CO2 curing at 0.1 bar and flow-through CO2 curing under ambient pressure. The results showed that CBLAs obtained by steam curing at 60 °C had the highest pellet strength, and the CO2 cured samples had the lowest water absorption values. CO2 curing with a pressure of 0.1 bar promoted a better pellet strength. The CO2 curing method can sequestrate 3.5–4.1% (by mass of pellets) of CO2, which can serve as a sustainable CO2 sequestration process to produce CBLAs.",

keywords = "Accelerated CO curing, Cold bonded lightweight aggregates, Integral recycling, Solid wastes",

author = "Pei Tang and Dongxing Xuan and Cheng, {Hiu Wun} and Poon, {Chi Sun} and Tsang, {Daniel C.W.}",

note = "Funding Information: The authors wish to thank the Innovation and Technology Support Programme ( ITS-002-17FP ), the Hong Kong Research Grants Council General Research Fund ( PolyU152144/17E and PolyU15223517 ) and the Hong Kong Polytechnic University for funding support. We would also like to thank Dr. Jiangshan Li (The Hong Kong Polytechnic University) for his assistance in sourcing the IBA used in this study. Publisher Copyright: {\textcopyright} 2019 Elsevier B.V. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.",

year = "2020",

month = jan,

day = "5",

doi = "10.1016/j.jhazmat.2019.120951",

language = "English",

volume = "381",

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Use of CO₂ curing to enhance the properties of cold bonded lightweight aggregates (CBLAs) produced with concrete slurry waste (CSW) and fine incineration bottom ash (IBA). / Tang, Pei; Xuan, Dongxing; Cheng, Hiu Wun et al.
In: Journal of Hazardous Materials, Vol. 381, 120951, 05.01.2020.

Research output: Journal article publication › Journal article › Academic research › peer-review

TY - JOUR

T1 - Use of CO2 curing to enhance the properties of cold bonded lightweight aggregates (CBLAs) produced with concrete slurry waste (CSW) and fine incineration bottom ash (IBA)

AU - Tang, Pei

AU - Xuan, Dongxing

AU - Cheng, Hiu Wun

AU - Poon, Chi Sun

AU - Tsang, Daniel C.W.

N1 - Funding Information: The authors wish to thank the Innovation and Technology Support Programme ( ITS-002-17FP ), the Hong Kong Research Grants Council General Research Fund ( PolyU152144/17E and PolyU15223517 ) and the Hong Kong Polytechnic University for funding support. We would also like to thank Dr. Jiangshan Li (The Hong Kong Polytechnic University) for his assistance in sourcing the IBA used in this study. Publisher Copyright: © 2019 Elsevier B.V. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.

PY - 2020/1/5

Y1 - 2020/1/5

N2 - In this study, concrete slurry waste (CSW) obtained from ready-mixed concrete plants was recycled as a fresh cementitious binder and used together with municipal solid waste incineration (MSWI) fine bottom ash (IBA) from waste-to-energy plants to produce cold bonded lightweight aggregates (CBLAs) by using a pelletizing technique. The influence of different curing methods on the properties of the produced CBLAs were experimentally investigated, including moist curing, steam curing, and accelerated CO2 curing at 0.1 bar and flow-through CO2 curing under ambient pressure. The results showed that CBLAs obtained by steam curing at 60 °C had the highest pellet strength, and the CO2 cured samples had the lowest water absorption values. CO2 curing with a pressure of 0.1 bar promoted a better pellet strength. The CO2 curing method can sequestrate 3.5–4.1% (by mass of pellets) of CO2, which can serve as a sustainable CO2 sequestration process to produce CBLAs.

AB - In this study, concrete slurry waste (CSW) obtained from ready-mixed concrete plants was recycled as a fresh cementitious binder and used together with municipal solid waste incineration (MSWI) fine bottom ash (IBA) from waste-to-energy plants to produce cold bonded lightweight aggregates (CBLAs) by using a pelletizing technique. The influence of different curing methods on the properties of the produced CBLAs were experimentally investigated, including moist curing, steam curing, and accelerated CO2 curing at 0.1 bar and flow-through CO2 curing under ambient pressure. The results showed that CBLAs obtained by steam curing at 60 °C had the highest pellet strength, and the CO2 cured samples had the lowest water absorption values. CO2 curing with a pressure of 0.1 bar promoted a better pellet strength. The CO2 curing method can sequestrate 3.5–4.1% (by mass of pellets) of CO2, which can serve as a sustainable CO2 sequestration process to produce CBLAs.

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