坝体混凝土材料性能演化与孔结构的关系研究  

Study on relationship between dam concrete material performance evolution and its pore structure

作　　者：牛志国[1,2] 游日[2] 吴金涛[3] 

机构地区：[1]水文水资源与水利工程科学国家重点实验室,江苏南京210029 [2]南京水利科学研究院,江苏南京210029 [3]河海大学,江苏南京210098

出　　处：《水利水电技术》2016年第11期25-28,35,共5页Water Resources and Hydropower Engineering

基　　金：国家自然科学基金资助项目(51109142;51309162);国家重点研发计划课题(2016YFC0401610);中央级公益性科研院所基本科研业务费专项资金项目(Y413002);江苏省交通厅科技项目(2015T47-1)

摘　　要：为了研究坝体混凝土的性能演化规律,通过现场取样和压汞试验,分析了混凝土芯样不同部位的孔结构特征,并将长龄期混凝土抗压强度的理论结果和试验数据做了对比。研究表明,坝体混凝土的性能演化与其孔结构有着一定的相关性,采用混凝土的孔结构表征坝体材料性能是可行的。研究成果为揭示复杂环境下混凝土坝材料性能演化机理提供了依据。In order to study the evolution law of concrete performance of dam, the characteristics of the pore structure of the con- crete core samples taken from different locations are analyzed through the in situ sampling and mercury intrusion test, while a comparison is made between the theoretical result of the long-age concrete compressive strength and the relevant testing data. The study shows that there is a certain correlation between the evolution of dam concrete performance and its pore structure, thus it is feasible to characterize the dam concrete performance with the pore structure of concrete. The study result provides a basis for re- vealing the mechanism of the evolution of dam concrete performanace under complicataed environment.

关 键 词：混凝土坝 压汞试验 长龄期混凝土 孔结构 

分 类 号：TV642[水利工程—水利水电工程]