摘要
在对不同掺加量的粉煤灰混凝土的受拉应变能力、混凝土的特征长度以及收缩性能试验,从这三个方面探讨了粉煤灰在改善混凝土抗裂性能中的作用。试验研究发现:掺入一定量的粉煤灰并不会显著影响混凝土的抗压强度,却明显改善了其受拉应变能力,降低了其脆性,也改善了其干缩性。并对粉煤灰提高混凝土抗裂性能的机理进行了理论分析。
The tension strain, characteristic length and contractility of different component fly ash concrete was record by experimental.It is discussed that the function of fly ash in increasing the crack resistance of concrete from these three aspects.The experimental study discovered that rational mixed with fly ash cannot affect the compressive strength of the concrete obviously, but it can improved its tensile strain ability obviously, reduced its brittleness,also improved its air shrinkage.Then the mechanism of action is analysed about the ability of fly ash in increasing the crack resistance of concrete.
出处
《混凝土》
CAS
CSCD
北大核心
2007年第8期72-74,共3页
Concrete
关键词
粉煤灰混凝土
试验
抗裂性
配合比
fly ash concrete
experimental
crack resistance
mixture ratio
作者简介
张国强（1965-），男，硕士，副教授，主要研究方向为道路工程材料及混凝土耐久性。单位地址：河南省平顶山市湛南路26号平顶山工学院土木工程系（467001）联系电话：0375—3673549
