河南城建学院学报2026，Vol.35Issue(4)：30-41,12.DOI:10.14140/j.cnki.hncjxb.2026.04.004
稻壳灰-矿渣双元胶凝材料地聚物优化及强度形成机理研究
Research on the optimization and strength formation mechanism of rice husk ash-slag binary cementitious geopolymer
摘要
Abstract
To address the issues of high dry shrinkage and high cost of single slag-based geopolymers and promote the resource utilization of solid waste and low-carbon development in civil engineering,this study developed a binary geopolymer using granulated blast furnace slag as the core material and rice husk ash as the agricultural solid waste admixture.The response surface analysis methodology was adopted to optimize the sol-gel ratio,alkali activator modulus and water-to-binder ratio of the slag-based geopolymer through fluidity,mechanical strength and dry shrinkage tests,and to determine the reasonable proportion of rice husk ash.Meanwhile,XRD,FTIR,NMR and SEM microscopic testing techniques were used to reveal the strength formation mechanism of geopolymer of rice husk ash-slag binary cementitious materials(GRS).The results show that the optimal alkali activation conditions for the slag-based geopolymer are a sol-gel ratio of 0.29,an alkali activator modulus of 1.7,and a water-to-binder ratio of 0.36;15%of rice husk ash can alleviate the autogenous shrinkage of the geopolymer,and the amorphous SiO2 it contains promotes the formation of C-(A)-S-H gel,increasing the 28 d flexural and compressive strength of the geopolymer by 14.62%and 9.08%respectively,while reducing the dry shrinkage rate by 5.39%.However,excessive rice husk ash(≥20%)leads to increased porosity and reduced mechanical properties due to the dilution of the cementitious components and decreased slurry fluidity.The results provide a new methodology for the resource utilization of slag and rice husk ash,and offer theoretical support and practical reference for the composition optimization of GRS materials.关键词
矿渣/稻壳灰/响应面法/干燥收缩/固废资源化/地聚物Key words
slag/rice husk ash/response surface methodology/drying shrinkage/solid waste resource utilization/geopolymer分类
建筑与水利引用本文复制引用
王寅生,张苛,张伟,谢巍,潘强,孙文伟..稻壳灰-矿渣双元胶凝材料地聚物优化及强度形成机理研究[J].河南城建学院学报,2026,35(4):30-41,12.基金项目
安徽省住房城乡建设科学技术计划项目(2025-YF045) （2025-YF045）
安徽省高等学校自然科学研究重点项目(2025AHGXZK30369) （2025AHGXZK30369）
