矿物掺合料与养护制度对混凝土墙体碳化性能的影响研究  

Study on the effect of mineral admixture and curing system on the carbonation properties of concrete walls

作　　者：陈克家 刘兴 刘恭立 贺阳 路珏 CHEN Kejia;LIU Xing;LIU Gongli;HE Yang;LU Jue(Guizhou Qiangui Engineering&Technology Service Consulting Co.Ltd.,Guiyang 550000,China;China Academy of Building Research,Beijing 100013,China)

机构地区：[1]贵州黔贵工程技术服务咨询有限公司,贵州贵阳550000 [2]中国建筑科学研究院有限公司,北京100013

出　　处：《新型建筑材料》2025年第2期70-73,88,共5页New Building Materials

基　　金：国家自然科学基金面上项目(52178254)。

摘　　要：矿物掺合料和养护制度是影响混凝土碳化性能的关键因素,通过对成型实体墙体的长期观测,比较了单掺矿物掺合料体系及复掺矿物掺合料体系的混凝土在不同龄期的碳化深度,并研究了多种养护制度的碳化性能。结果表明,粉煤灰与矿粉复掺能够显著提升混凝土的抗碳化性能,单掺15%粉煤灰或单掺20%矿粉,可以显著减小混凝土的碳化深度;以10%粉煤灰与15%矿粉的复掺可以在长期内保持最小的碳化深度;矿粉-硅灰的复掺体系抗碳化性能优于粉煤灰-硅灰。另一方面,延长养护时间可以显著减小碳化深度,养护剂和弱碱溶液养护能进一步延缓混凝土碳化。Mineral admixtures and curing conditions are critical factors affecting concrete carbonation properties.This study compares the carbonation depths of concrete in single and combined mineral admixture systems at different ages through long-term observation of formed concrete walls.Additionally,the carbonation performance under various curing methods was investigated.The results indicate that the combined use of fly ash and slag significantly enhances concrete's resistance to carbonation.Specifically,incorporating 15%fly ash or 20%slag alone significantly reduces carbonation depth.The combination of 10%fly ash and 15%slag achieves the lowest long-term carbonation depth.The slag-silica fume combination exhibits better carbonation resistance than the fly ash-silica fume combination.Furthermore,extending the curing period significantly reduces carbonation depth,and the use of curing agents and weak alkaline solutions can further delay concrete carbonation.

关 键 词：混凝土墙体 碳化性能 矿物掺合料 养护制度 

分 类 号：TU528[建筑科学—建筑技术科学]