EXPERIMENTAL STUDY OF INFLUENCE OF CONCRETE STRESS HISTORY ON ITS LATTER PERFORMANCE
In order to study the influence of early loading on concretes latter performance, 28 concrete specimens (100mm×100mm×100mm) were made, whose strength grade, were C30 and C50.Those samples were cured 3 days and 5 days respectively, and then under sustained load (70 percent of 3 day and 5 day strength) for 28 days. The durative testing device which applied steel spring plate was designed to deal with the download problem. The difference between the samples which were standard curing 28 days and the samples which were under sustained load after 3 day or 5 day standard curing was compared. It was found that the strength of samples (grade C30) has little change although they were under sustainedload, and the strength of samples (grade C50) decreased by 4.03％. The conclusion was gained that concrete has the autogenously healing ability, and which leads to that preloading has little influence on its latter performance.
concrete autogenously healing early age strength
De-Wen Jiang Hong-Xing Qiu
College of Civil Engineering, HuaiHai Institute of Technolgy, Lia yungang 222005,P.R.China Key Lab. Key Lab. of RC & PC Structures of Ministry of Education,Southeast University, Nanjing 210096, P.R. C
国际会议
广州
英文
102-107
2009-11-28（万方平台首次上网日期，不代表论文的发表时间）