水利学报2017，Vol.48Issue(2)：210-216,225,8.DOI:10.13243/j.cnki.slxb.20160436
基于温度-应力试验的自生体积变形计算起点的研究
Study on calculation starting point of autogenous volume deformation based on thermal stress test
摘要
Abstract
For the starting point problem existed in calculating autogenous volume deformation by the standard test methods,ASTM C1074 test method for activation energy has been improved,taking the expansive abrasion-resistant concrete as the research object.More accurate activation energy of cementitious materials is obtained,and equivalent age of the specimen can be calculated under the actual temperature conditions based on the activation energy.Using the advantageous characters of thermal stress test and taking the equivalent age corresponding to the first zero stress as the effective starting point,an improved autogenous volume deformation model has been established on the basis of the model put forward by Japan Concrete Institute Conference.The improved model takes the maximum expansion value of autogenous volume deformation as a cutoff point and can simulate the deformation before and after the point separately,which provides reference for setting up a more accurate anti-crack model.关键词
自生体积变形/计算起点/温度-应力试验/等效龄期/抗冲磨混凝土Key words
autogenous volume deformation/calculation starting point/thermal stress test/equivalent age/abrasion-resistant concrete分类
建筑与水利引用本文复制引用
祝小靓,丁建彤,蔡跃波,白银..基于温度-应力试验的自生体积变形计算起点的研究[J].水利学报,2017,48(2):210-216,225,8.基金项目
中央级公益性科研院所基本科研业务费用专项项目(Y415014) （Y415014）
江西省水利厅科技项目(KT201414) （KT201414）
