Innovate geopolymer synthesis for green mine road construction: Analysis of efflorescence behavior and strength analysis

Lu, Xiang; Tian, Ya; Jiskani, Izhar Mithal; Zhou, Wei; Zhao, Binyu; Ding, Xiaohua; Ao, Zhongchen

doi:10.1016/j.conbuildmat.2023.132963

Cited by 6 publications

(2 citation statements)

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“…The results showed that the optimum UCS (unconfined compressive strength) of the mix was achieved at a geopolymer dosage of 7.5%. Lu X et al [9] prepared geopolymers for mine road construction from open-pit mine pavement aggregate, slag and fly ash and studied their weathering behavior; the results showed that with the slag and alkali activator admixture incremental price, the weathering resistance is enhanced, and the strength meets the requirements of the mine roads. Sun Y et al [10] used fly ash and granulated blast furnace slag to prepare geopolymer for pavement subgrade construction and investigated its road performance, which showed that the UCS of geopolymer-stabilized soils reached 5.1 MPa under the optimal proportioning and good resistance to freezing and thawing.…”

Section: Introductionmentioning

confidence: 99%

“…The results of the above research are summarized and analyzed, and then potential researchable content is identified. Firstly, existing research used geopolymers as a cementitious material, which can be used for roadbed construction and road construction in mining areas, with certain environmental and economic benefits, as the raw materials used are mostly industrial solid wastes [9][10][11][12]15,16]. Secondly, considering the existing research on geopolymer-stabilized road building materials' mechanical strength, frost resistance, environmental impact and other aspects, the results show the following: the geopolymer, as road building materials, has good mechanical strength, with a certain degree of frost resistance, and the geopolymer effectively reduces the leaching rate of the heavy metals contained in industrial solid waste materials [11,20,21].…”

Section: Introductionmentioning

confidence: 99%

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Mechanical Response and Deterioration Mechanisms in Freeze–Thaw Environments for Crushed Stone Stabilized with Industrial Solid Waste

Li,

Ji,

et al. 2024

Applied Sciences

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The conflict between industrial solid waste treatment and environmental protection in Inner Mongolia is becoming increasingly prominent. Using industrial solid waste such as mineral powder, fly ash and wet calcium carbide slag as raw materials, using the alkali excitation method to prepare geopolymer, and replacing part of the cement for pavement base can effectively absorb industrial solid waste and realize the dual goals of waste utilization and environmental protection. Through mechanical properties tests before and after a freeze–thaw cycle and micro tests such as scanning electron microscopy (SEM) and mercury intrusion porosimetry (MIP), the strength variation rule and mechanism of geopolymer-cement stabilized aggregate under freeze–thaw cycles were deeply investigated. The relationship between different porosity indexes and mechanical properties in mercury intrusion porosimetry (MIP) was established by grey relation analysis. The results prove that a mixture with impaired properties after freeze–thaw cycles and the anti-freezing performance of the mixture with 20% geopolymer content are better than that of the mixture with no geopolymer content and 40% geopolymer content. The loss rates of unconfined compressive strength (UCS) after 5, 10 and 20 freeze–thaw cycles were 9.5%, 27.6% and 36.4%, respectively. The appropriate addition of geopolymer can enhance the anti-freezing performance of a stable aggregate. Following freezing and thawing cycles, the unconfined compressive strength (UCS) damage of the mixture is mainly influenced by a rise in total porosity, and the grey correlation degree is 0.75. The increase in more harmful pores and total porosity mainly results in an indirect tensile strength (ITS) loss. The grey correlation degree is 0.91. The compressive rebound modulus (CRM) is not affected by the change in pores but decreases with a rise in the geopolymer dosage.

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Section: Introductionmentioning

confidence: 99%