Zobrazit v EDS

Proportion optimization and performance analysis of ternary solid waste geopolymer grouting material based on the response surface method

Uloženo v:
Podrobná bibliografie
Název: Proportion optimization and performance analysis of ternary solid waste geopolymer grouting material based on the response surface method
Autoři: Jiaquan Wang, Xinbiao Wu, Xinyu Tao, Zhenchao Chang, Yi Tang
Zdroj: Case Studies in Construction Materials, Vol 23, Iss , Pp e05370- (2025)
Informace o vydavateli: Elsevier, 2025.
Rok vydání: 2025
Sbírka: LCC:Materials of engineering and construction. Mechanics of materials
Témata: Resource utilization of solid waste, Geopolymer grouting material, Response surface method, Proportioning optimization, Strength evolution mechanism, Materials of engineering and construction. Mechanics of materials, TA401-492
Popis: Subgrade loosening, cavities, and sub-slab voids are common distresses in aging highways, severely affecting structural performance and driving safety. This study addresses the Guigang S511 project in Guangxi, China, by developing an eco-friendly ternary geopolymer grouting material composed of slag powder (SP), fly ash (FA), and red mud (RM). The mix design was optimized using Response Surface Methodology (RSM), investigating the effects of sodium silicate concentration, modulus, and RM content on slurry fluidity as well as 7-day and 28-day compressive strengths. Accurate regression models were developed to predict material performance. Results showed that the interaction between sodium silicate concentration and modulus had the greatest influence on slurry fluidity and 28-day compressive strength, whereas the 7-day strength was mainly affected by the interaction between sodium silicate concentration and RM content. The optimal mix design was identified as a sodium silicate concentration of 1.0 mol·L⁻¹ , modulus of 1.57, and RM content of 15 %. Microstructural analysis confirmed that, under this optimized formulation, all three industrial wastes actively participated in the geopolymerization process, forming laumontite and calcium-(sodium) aluminosilicate hydrate C-(N)-A-S-H gels, thereby ensuring excellent long-term mechanical performance. The proposed material not only provides an effective solution for subgrade remediation in the S511 project but also demonstrates a sustainable pathway for the high-value utilization of industrial solid wastes in road engineering.
Druh dokumentu: article
Popis souboru: electronic resource
Jazyk: English
ISSN: 2214-5095
Relation: http://www.sciencedirect.com/science/article/pii/S2214509525011684; https://doaj.org/toc/2214-5095
DOI: 10.1016/j.cscm.2025.e05370
Přístupová URL adresa: https://doaj.org/article/28018a4d5cd14b03b771c03dfc454ce3
Přístupové číslo: edsdoj.28018a4d5cd14b03b771c03dfc454ce3
Databáze: Directory of Open Access Journals
Popis
Abstrakt:Subgrade loosening, cavities, and sub-slab voids are common distresses in aging highways, severely affecting structural performance and driving safety. This study addresses the Guigang S511 project in Guangxi, China, by developing an eco-friendly ternary geopolymer grouting material composed of slag powder (SP), fly ash (FA), and red mud (RM). The mix design was optimized using Response Surface Methodology (RSM), investigating the effects of sodium silicate concentration, modulus, and RM content on slurry fluidity as well as 7-day and 28-day compressive strengths. Accurate regression models were developed to predict material performance. Results showed that the interaction between sodium silicate concentration and modulus had the greatest influence on slurry fluidity and 28-day compressive strength, whereas the 7-day strength was mainly affected by the interaction between sodium silicate concentration and RM content. The optimal mix design was identified as a sodium silicate concentration of 1.0 mol·L⁻¹ , modulus of 1.57, and RM content of 15 %. Microstructural analysis confirmed that, under this optimized formulation, all three industrial wastes actively participated in the geopolymerization process, forming laumontite and calcium-(sodium) aluminosilicate hydrate C-(N)-A-S-H gels, thereby ensuring excellent long-term mechanical performance. The proposed material not only provides an effective solution for subgrade remediation in the S511 project but also demonstrates a sustainable pathway for the high-value utilization of industrial solid wastes in road engineering.
ISSN:22145095
DOI:10.1016/j.cscm.2025.e05370