Combined preparation and application of geopolymer pavement materials from coal slurry-slag powder-fly ash mining solid waste: A case study

Qin, Zhenghan; Yuan, Yong; Chen, Zhongshun; Li, Yong; Xia, Yongqi

doi:10.1016/j.conbuildmat.2024.137510

Construction and Building Materials

2024

DOI: 10.1016/j.conbuildmat.2024.137510

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Combined preparation and application of geopolymer pavement materials from coal slurry-slag powder-fly ash mining solid waste: A case study

Zhenghan Qin,

Yong Yuan,

Zhongshun Chen

et al.

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Cited by 2 publications

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Research progress of resourceful and efficient utilization of coal gangue in the field of building materials

Wang,

Pan,

Zhao

et al. 2025

Journal of Building Engineering

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Research progress of resourceful and efficient utilization of coal gangue in the field of building materials

Wang,

Pan,

Zhao

et al. 2025

Journal of Building Engineering

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Utilization of Municipal Solid Waste Incineration (MSWIFA) in Geopolymer Concrete: A Study on Compressive Strength and Leaching Characteristics

Xu,

Shang,

2024

Materials

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This study explores the utilization of municipal solid waste incineration fly ash (MSWIFA) in geopolymer concrete, focusing on compressive strength and heavy metal leachability. MSWIFA was sourced from a Shenzhen waste incineration plant and pretreated by washing to remove soluble salts. Geopolymer concrete was prepared incorporate with washed or unwashed MSWIFA and tested under different pH conditions (2.88, 4.20, and 10.0). Optimal compressive strength was achieved with a Si/Al ratio of 1.5, water/Na ratio of 10, and sand-binder ratio of 0.6. The washing pretreatment significantly enhanced compressive strength, particularly under alkaline conditions, with GP-WFA (washed MSWIFA) exhibiting a 49.6% increase in compressive strength, compared to a 21.3% increase in GP-FA (unwashed MSWIFA). Additionally, GP-WFA’s compressive strength reached 41.7 MPa, comparable to that of the control (GP-control) at 43.7 MPa. Leaching tests showed that acidic conditions (pH 2.88) promoted heavy metal leaching, which increased over the leaching time, while an alkaline environment significantly reduced the leachability of heavy metals. These findings highlight the potential of using washed MSWIFA in geopolymer concrete, promoting sustainable construction practices, particularly in alkaline conditions.

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Combined preparation and application of geopolymer pavement materials from coal slurry-slag powder-fly ash mining solid waste: A case study

Cited by 2 publications

References 31 publications

Research progress of resourceful and efficient utilization of coal gangue in the field of building materials

Research progress of resourceful and efficient utilization of coal gangue in the field of building materials

Utilization of Municipal Solid Waste Incineration (MSWIFA) in Geopolymer Concrete: A Study on Compressive Strength and Leaching Characteristics

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