硅酸盐通报2025，Vol.44Issue(5)：1949-1956,8.DOI:10.16552/j.cnki.issn1001-1625.2024.1403
粉煤灰基地质聚合物及含水率对固化土力学性能的影响
Effect of Fly Ash-Based Geopolymer and Water Content on Mechanical Properties of Solidified Soil
魏贤华 1王得林 1李超 1钟海军 1郭龙龙1
作者信息
- 1. 中国铁建港航局集团有限公司,珠海 519000
- 折叠
摘要
Abstract
Geopolymer is a new type of silica-aluminium material with amorphous three-dimensional network structure,which is obtained by appropriate process and chemical reaction with SiO2 and Al2O3 as main components.Using geopolymers to partially replace cement for soil solidification not only reduces the amount of cement,but also improves the strength and durability of solidified soil.In this study,fly ash-based geopolymer was used to partially replace cement to solidify powdery soil.The effects of different curing agent ratios,proportion of fly ash-based geopolymer replacing cement,water content,and curing time on the unconfined compressive strength of solidified soil were investigated.The results show that the curing effect of fly ash-based geopolymer partially replacing cement on soil is significantly improved.When the curing agent content is 8％～15％(mass fraction),the unconfined compressive strength of the solidified soil is greater,and the strength growth rate is faster.With the increase of the proportion of fly ash-based geopolymer replacing cement,the unconfined compressive strength of solidified soil increases first and then decreases.When the water content is 28％,the proportion of fly ash-based geopolymer is 5％(mass fraction),and the curing time is 60 d,the unconfined compressive strength of solidified soil reaches the maximum value.When the proportion of fly ash-based geopolymer is 10％ and 15％(mass fraction),the unconfined compressive strength of solidified soil increases first and then decreases with the increase of water content.When the proportion of fly ash-based geopolymer is 0％ and 5％(mass fraction),the unconfined compressive strength of solidified soil decreases with the increase of fly ash-based water content.With the increase of fly ash-based geopolymer content,the stress-strain curve slope of solidified soil first increases and then decreases.关键词
粉煤灰/普通硅酸盐水泥/固化土/地质聚合物/无侧限抗压强度/含水率Key words
fly ash/ordinary Portland cement/solidified soil/geopolymer/unconfined compressive strength/water content分类
建筑与水利引用本文复制引用
魏贤华,王得林,李超,钟海军,郭龙龙..粉煤灰基地质聚合物及含水率对固化土力学性能的影响[J].硅酸盐通报,2025,44(5):1949-1956,8.
