摘要
混凝土在浇筑时会产生空隙和微裂纹 ,形成初始损伤 ,但其定量十分困难。文章通过试验的方法在 5组同一种混凝土试块中掺入不同数量的引气剂模拟初始损伤 ,通过单轴压缩试验 ,测出了该种混凝土的初始损伤值及理想无损弹模 ,并分析了试块在达到强度极限前的损伤演变规律。试验结果表明 ,当荷载小于试块最大承载力的 40 %～ 5 0 %时 ,损伤并不发展 ,其后才有所发展并逐渐增大。
Quantitation of initial damage in concrete due to holes and small cracks resulting from concrete pouring is a difficult thing.In this paper, initial damage is simulated through mixing different quantities of initiator into five test samples of the same concrete. Axial compression tests are carried out,and the value of initial damage and nondestructive elastic modulus of the concrete are obtained. The regularity of damage development of the samples under limit strength is analyzed.It is found that the damage did not develop until the load was more than 40%～50% of the limit load.
出处
《合肥工业大学学报（自然科学版）》
CAS
CSCD
2001年第6期1061-1065,共5页
Journal of Hefei University of Technology：Natural Science
基金
国家自然科学基金资助项目 ( 5 9739180 )
