粉煤灰对混凝土早期拉伸徐变等性能影响的试验研究  

Experimental Study on the Influence of Fly Ash on the Early-Aged Tensile Creep and Other Properties of Concrete

作　　者：王新杰[1] 夏群[1] 

机构地区：[1]常州大学环境与安全工程学院,江苏常州213164

出　　处：《常州大学学报（自然科学版）》2015年第4期26-30,共5页Journal of Changzhou University：Natural Science Edition

基　　金：国家自然科学基金项目(51109081);常州大学校基金资助项目(ZMF1002122)

摘　　要：试验研究了粉煤灰掺量对早龄期混凝土劈裂抗拉强度、自收缩、拉伸弹性模量、拉伸徐变和轴心抗拉强度的影响。结果表明:混凝土的劈裂抗拉强度、自收缩、拉伸弹性模量和拉伸徐变均随着粉煤灰掺量的增加而逐渐减小;混凝土的轴心抗拉强度也随着粉煤灰掺量的增加而逐渐减小,但长期拉伸荷载作用可使混凝土的轴心抗拉强度降低。Experimental study on the influences of the content of fly ash on the splitting tensile strength, autogenous shrinkage, tensile modulus, tensile creep and axial tensile strength are studied in this paper. The results indicated that splitting tensile strength, autogenous shrinkage, tensile modulus and tensile creep decreases with increasing of content of fly ash. Axial tensile strength of concrete decreases with in- creasing of content of fly ash too, but under long-term tensile load the axial tensile strength of concrete is reduced.

关 键 词：混凝土 粉煤灰 劈裂抗拉强度 拉伸徐变 自收缩 

分 类 号：TU1[建筑科学—建筑理论]