长龄期外掺氧化镁混凝土的微观孔结构研究  

Micro-pore structures of MgO concrete at long-term age

作　　者：陈昌礼[1,2] 杨华山[1] 李维维[1,2] 陈荣妃[1] 

机构地区：[1]贵州师范大学材料与建筑工程学院,贵阳550025 [2]贵州师范大学工程材料研究所,贵阳550025

出　　处：《水力发电学报》2016年第6期118-124,共7页Journal of Hydroelectric Engineering

基　　金：国家自然科学基金(51269003;50969002)

摘　　要：为了促进外掺MgO混凝土的推广应用,主要采用压汞测试手段,对掺与不掺MgO的混凝土和掺与不掺粉煤灰的MgO混凝土的微观孔结构持续跟踪了5年。结果表明,在混凝土中掺入适量MgO后,混凝土的微观孔结构随着龄期的增长持续改善;在混凝土中同时掺入适量的MgO和粉煤灰后,长龄期混凝土的微观孔结构进一步改善。Laboratory observations of five years long have been made on the micro-pore structures of MgO concrete admixed with and without fly ash respectively in this study, using mercury intrusion porosimetry to prompt application of the concrete with magnesium oxide or MgO concrete. Concrete without MgO admixture was used as a reference. The results showed that the micro-pore structure of concrete was improved continuously with age when mixing with appropriate MgO content while it was further improved at long age when mixing with appropriate MgO and fly ash contents.

关 键 词：水工材料 微观孔结构 压汞测试 氧化镁混凝土 粉煤灰 长龄期 

分 类 号：TV431[水利工程—水工结构工程]