摘要
针对当前混凝土学术界研究的热点问题之一高性能混凝土的收缩,提出了一种新的、简单的测试高性能混凝土收缩的方法,即改进型环形收缩试验方法,详细叙述了改进型环形收缩试验的试验装置、试验方法、试验原理和适用性.采用该试验方法可以进行高性能混凝土自由收缩的测定、不同约束程度的约束收缩的测定、开裂龄期和开裂趋势的观测.该试验方法既克服了常用的环形约束收缩试验的缺点,即无法得到约束应力的信息,又具有轴向约束收缩试验的某些特点,即可以得到高性能混凝土的多个早期性能参数,据此更为准确地评价高性能混凝土的抗裂性能,揭示高性能混凝土的开裂机理.
Aimed at one of the hot issue in the field of concrete research shrinkage of HPC, a new and simple test method for measuring shrinkage of High Performance Concrete （HPC） was proposed, which is called the method of improved circular shrinkage test. The apparatus, procedure, principle and applicability of this new test method was discussed in detail. The new test method can he used to measure the free and various restrained shrinkage of HPC, survey the tendency of shrinkage Cracking, and HPC behavior due to restrained. The shortage of conventional circular test, which can not provide the data of stress, is overcome. It also has some characters of uniaxial test, which can identify some parameters of HPC in early age and evaluate the cracking of HPC as well as mechanism of cracking.
出处
《兰州理工大学学报》
CAS
北大核心
2006年第1期126-129,共4页
Journal of Lanzhou University of Technology
基金
甘肃省重大科技成果转化项目(GS023-A52-030)
关键词
高性能混凝土
环形约束收缩
试验方法
应力
应变
high performance concrete
circularly restrained shrinkage
test method
stress
strain
