材料科学与工程学报2025，Vol.43Issue(2)：217-223,7.DOI:10.14136/j.cnki.issn1673-2812.2025.02.007
络合剂和矿物掺合料对砂浆抗冻能力的影响
Effects of Chelator and Mineral Admixture on Frost Resistance of Mortar
摘要
Abstract
The addition of a chelator enhances crack repair and pore closure in cement mortar.This study investigates the effects of incorporating a chelator and mineral admixtures(slag,fly ash)on the frost resistance and self-healing capacity of mortar by evaluating its mass loss,mechanical properties,impermeability,pore size distribution,and microstructural changes during freeze-thaw(F-T)cycles.The results indicate that mortar containing a chelator and slag exhibits the highest resistance to frost damage and the strongest self-healing capability after F-T cycles.After undergoing 100 F-T cycles,compared to ordinary mortar,the mass loss rate decreased by 43.6％,the reduction in compressive strength was 46.2％,the chloride migration coefficient dropped by 70.8％,and the proportion of harmful pores(＞0.1 μm)decreased by 34.5％.Following a 28-day curing period after F-T cycles,the compressive strength recovery rate of the mortar with chelator and slag reached 21.1％,the chloride migration coefficient reduction was 12.8％,and the proportion of harmful pores was further reduced by 25.1％.Microstructural analysis revealed a significant amount of C-S-H gel filled pores and microcracks within the mortar,contributing to the enhanced frost resistance.关键词
络合剂/自修复/冻融/水泥砂浆/矿物掺合料Key words
Chelator/Self-healing/Freeze-thaw/Cement mortar/Mineral admixture分类
土木建筑引用本文复制引用
王瑞阳,余剑英,况栋梁,刘全涛..络合剂和矿物掺合料对砂浆抗冻能力的影响[J].材料科学与工程学报,2025,43(2):217-223,7.基金项目
陕西省自然科学基础研究计划项目(2023-JC-QN-0435) （2023-JC-QN-0435）
长安大学中央高校基本科研业务费资助项目(300102313104) （300102313104）
硅酸盐建筑材料国家重点实验室(武汉理工大学)开放基金项目(SYSJJ2023-01) （武汉理工大学）
