Utilization of pretreated municipal solid waste incineration fly ash for cement-stabilized soil

Copyright © 2020 Elsevier Ltd. All rights reserved.

Bibliographische Detailangaben
Veröffentlicht in:Waste management (New York, N.Y.). - 1999. - 105(2020) vom: 15. März, Seite 425-432
1. Verfasser: Liang, Shihua (VerfasserIn)
Weitere Verfasser: Chen, Juntao, Guo, Mingxin, Feng, Deluan, Liu, Liang, Qi, Tian
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2020
Zugriff auf das übergeordnete Werk:Waste management (New York, N.Y.)
Schlagworte:Journal Article Cement-stabilized soil MSWIFA Pretreatment Synergistic effect Unconfined compressive strength Coal Ash Metals, Heavy Particulate Matter Soil mehr... Solid Waste Carbon 7440-44-0
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520 |a In this study, the feasibility of using municipal solid waste incineration fly ash (MSWIFA) as additive for the strengthening of pretreated cement-stabilized soil was evaluated. Results indicated that the leaching concentrations of chromium and lead in MSWIFA after the water washing process and addition of 4% ferrous sulphate were reduced by 67% and 89%, respectively, which was lower than the limit value of Identification standard for hazardous waste (GB 5085.3-2007). After pretreatment, MSWIFA samples with ratios of 5% and 10% were blended into cement-stabilized soil with ordinary Portland cement (OPC) content of 10%, 15% and 20%. The unconfined compressive strength (UCS), internal friction angle and cohesion of the cement-stabilized soil increased with OPC and pretreated MSWIFA (PFA) content. The same effect was observed on UCS after the addition of 10% PFA as replacement of 5% OPC. In the subsequent X-ray powder diffraction test, scanning electron microscopy and leaching tests, the leaching concentrations of heavy metals in cement-stabilized soil became far lower than the limit value under the synergistic effects of the physical encapsulation of hydration products and stabilization of chemical agents. The incorporation of PFA as a supplementary material can effectively accelerate the formation of hydration products and can thus provide cleaner options for foundation reinforcement 
650 4 |a Journal Article 
650 4 |a Cement-stabilized soil 
650 4 |a MSWIFA 
650 4 |a Pretreatment 
650 4 |a Synergistic effect 
650 4 |a Unconfined compressive strength 
650 7 |a Coal Ash  |2 NLM 
650 7 |a Metals, Heavy  |2 NLM 
650 7 |a Particulate Matter  |2 NLM 
650 7 |a Soil  |2 NLM 
650 7 |a Solid Waste  |2 NLM 
650 7 |a Carbon  |2 NLM 
650 7 |a 7440-44-0  |2 NLM 
700 1 |a Chen, Juntao  |e verfasserin  |4 aut 
700 1 |a Guo, Mingxin  |e verfasserin  |4 aut 
700 1 |a Feng, Deluan  |e verfasserin  |4 aut 
700 1 |a Liu, Liang  |e verfasserin  |4 aut 
700 1 |a Qi, Tian  |e verfasserin  |4 aut 
773 0 8 |i Enthalten in  |t Waste management (New York, N.Y.)  |d 1999  |g 105(2020) vom: 15. März, Seite 425-432  |w (DE-627)NLM098197061  |x 1879-2456  |7 nnns 
773 1 8 |g volume:105  |g year:2020  |g day:15  |g month:03  |g pages:425-432 
856 4 0 |u http://dx.doi.org/10.1016/j.wasman.2020.02.017  |3 Volltext 
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