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Effect of curing regime on the immobilization of municipal solid waste incineration fly ash in sustainable cement mortar

Stabilizing/solidificating municipal solid waste incineration fly ash (MIFA) with cement is a common strategy, and it is critical to study the high-value utilization of MIFA in ordinary Portland cement (OPC) components. With this aim, binary-binding-system mortar was produced by partially replacing...

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Main Authors: Baoju Liu, Baoju Liu, Lei Yang, Lei Yang, Jinyan Shi, Jinyan Shi, Shipeng Zhang, Shipeng Zhang, Çağlar Yalçınkaya, Çağlar Yalçınkaya, Abdullah Faisal Alshalif, Abdullah Faisal Alshalif
Format: Article
Language:English
Published: Elsevier 2023
Subjects:
T Technology (General)
Online Access:http://eprints.uthm.edu.my/11372/1/J15830_f3a6175b5b4fb5b3f2c22b4134ab5d12.pdf
http://eprints.uthm.edu.my/11372/
https://doi.org/10.1016/j.envpol.2022.120839
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spelling my.uthm.eprints.113722024-07-14T03:02:44Z http://eprints.uthm.edu.my/11372/ Effect of curing regime on the immobilization of municipal solid waste incineration fly ash in sustainable cement mortar Baoju Liu, Baoju Liu Lei Yang, Lei Yang Jinyan Shi, Jinyan Shi Shipeng Zhang, Shipeng Zhang Çağlar Yalçınkaya, Çağlar Yalçınkaya Abdullah Faisal Alshalif, Abdullah Faisal Alshalif T Technology (General) Stabilizing/solidificating municipal solid waste incineration fly ash (MIFA) with cement is a common strategy, and it is critical to study the high-value utilization of MIFA in ordinary Portland cement (OPC) components. With this aim, binary-binding-system mortar was produced by partially replacing OPC (~50%) with MIFA, and the effects of different curing regimes (steam curing and carbonation curing) on the properties of the cement mortar were studied. The results showed that the setting time of the cement paste was shorten with the increase of MIFA content, and steam curing accelerated the hardening of the mixture. Although the incorporation of MIFA reduced the strength of the mortar, compared to conventional curing method, steam curing and carbonation curing increased the 3-d strength of the mortar. For high-volume MIFA mortars, the CO2-cured samples had the highest long-term strength and lowest permeability. The incorporation of MIFA increased the initial porosity of the mortar, thereby significantly increasing the carbonation degree and crystallinity of the reaction product - CaCO3. Steam curing also further narrowed the difference in the hydration degree between MIFA-modified sample and plain paste, which may be due to the enhanced hydraulic reactivity of MIFA at high temperatures. Although the incorporation of MIFA increased the porosity of the mortar, this waste-derived SCM refined the bulk pore structure and decreased the interconnected porosity. Additionally, the heavy metal leaching contents of MIFAmodified mortars were all below 1%, which meet the requirements of Chinese standards. Compared with standard curing, steam curing and carbonation curing made the early-age and long-term performance of MIFAmodified mortar better, which can promote the efficient application of MIFA in OPC products. Elsevier 2023 Article PeerReviewed text en http://eprints.uthm.edu.my/11372/1/J15830_f3a6175b5b4fb5b3f2c22b4134ab5d12.pdf Baoju Liu, Baoju Liu and Lei Yang, Lei Yang and Jinyan Shi, Jinyan Shi and Shipeng Zhang, Shipeng Zhang and Çağlar Yalçınkaya, Çağlar Yalçınkaya and Abdullah Faisal Alshalif, Abdullah Faisal Alshalif (2023) Effect of curing regime on the immobilization of municipal solid waste incineration fly ash in sustainable cement mortar. Environmental Pollution, 317. pp. 1-11. https://doi.org/10.1016/j.envpol.2022.120839
institution Universiti Tun Hussein Onn Malaysia
building UTHM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Tun Hussein Onn Malaysia
content_source UTHM Institutional Repository
url_provider http://eprints.uthm.edu.my/
language English
topic T Technology (General)
spellingShingle T Technology (General)
Baoju Liu, Baoju Liu
Lei Yang, Lei Yang
Jinyan Shi, Jinyan Shi
Shipeng Zhang, Shipeng Zhang
Çağlar Yalçınkaya, Çağlar Yalçınkaya
Abdullah Faisal Alshalif, Abdullah Faisal Alshalif
Effect of curing regime on the immobilization of municipal solid waste incineration fly ash in sustainable cement mortar
description Stabilizing/solidificating municipal solid waste incineration fly ash (MIFA) with cement is a common strategy, and it is critical to study the high-value utilization of MIFA in ordinary Portland cement (OPC) components. With this aim, binary-binding-system mortar was produced by partially replacing OPC (~50%) with MIFA, and the effects of different curing regimes (steam curing and carbonation curing) on the properties of the cement mortar were studied. The results showed that the setting time of the cement paste was shorten with the increase of MIFA content, and steam curing accelerated the hardening of the mixture. Although the incorporation of MIFA reduced the strength of the mortar, compared to conventional curing method, steam curing and carbonation curing increased the 3-d strength of the mortar. For high-volume MIFA mortars, the CO2-cured samples had the highest long-term strength and lowest permeability. The incorporation of MIFA increased the initial porosity of the mortar, thereby significantly increasing the carbonation degree and crystallinity of the reaction product - CaCO3. Steam curing also further narrowed the difference in the hydration degree between MIFA-modified sample and plain paste, which may be due to the enhanced hydraulic reactivity of MIFA at high temperatures. Although the incorporation of MIFA increased the porosity of the mortar, this waste-derived SCM refined the bulk pore structure and decreased the interconnected porosity. Additionally, the heavy metal leaching contents of MIFAmodified mortars were all below 1%, which meet the requirements of Chinese standards. Compared with standard curing, steam curing and carbonation curing made the early-age and long-term performance of MIFAmodified mortar better, which can promote the efficient application of MIFA in OPC products.
format Article
author Baoju Liu, Baoju Liu
Lei Yang, Lei Yang
Jinyan Shi, Jinyan Shi
Shipeng Zhang, Shipeng Zhang
Çağlar Yalçınkaya, Çağlar Yalçınkaya
Abdullah Faisal Alshalif, Abdullah Faisal Alshalif
author_facet Baoju Liu, Baoju Liu
Lei Yang, Lei Yang
Jinyan Shi, Jinyan Shi
Shipeng Zhang, Shipeng Zhang
Çağlar Yalçınkaya, Çağlar Yalçınkaya
Abdullah Faisal Alshalif, Abdullah Faisal Alshalif
author_sort Baoju Liu, Baoju Liu
title Effect of curing regime on the immobilization of municipal solid waste incineration fly ash in sustainable cement mortar
title_short Effect of curing regime on the immobilization of municipal solid waste incineration fly ash in sustainable cement mortar
title_full Effect of curing regime on the immobilization of municipal solid waste incineration fly ash in sustainable cement mortar
title_fullStr Effect of curing regime on the immobilization of municipal solid waste incineration fly ash in sustainable cement mortar
title_full_unstemmed Effect of curing regime on the immobilization of municipal solid waste incineration fly ash in sustainable cement mortar
title_sort effect of curing regime on the immobilization of municipal solid waste incineration fly ash in sustainable cement mortar
publisher Elsevier
publishDate 2023
url http://eprints.uthm.edu.my/11372/1/J15830_f3a6175b5b4fb5b3f2c22b4134ab5d12.pdf
http://eprints.uthm.edu.my/11372/
https://doi.org/10.1016/j.envpol.2022.120839
_version_ 1805890690169700352
score 13.211869

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