中国水利水电科学研究院学报2017，Vol.15Issue(3)：193-199,7.DOI:10.13244/j.cnki.jiwhr.2017.03.005
微膨胀抗冲磨混凝土早期徐变理论与试验研究
Study on calculation starting point of autogenous volume deformation based on thermal stress test
摘要
Abstract
Focusing on the point problem involved in the calculation of autogenous volume deformation by the standard test method,this paper takes the micro-expansive abrasion-resistant concrete as the research object and improves the ASTM C1074 method for activation energy tests.In this paper,a more accurate calculation is devised for the activation energy of hydration reaction of cementitious materials,from which the equivalent age of the specimen under the actuual temperature conditions can be obtained.Using the characteristics of thermal stress tests and adopting the equivalent age corresponding to the first zero stress as the effective starting point,we establish an improved autogenous volume deformation model based on the one put forward by the Japan Concrete Institute.With the Maximum expansion value of autogenous volume deformation as a cutoff point,the improved model has the unique ability to simulate the deformation before and after the point separately,which provides a good reference for the establishment of a more accurate anti-crack model.关键词
微膨胀/抗冲磨混凝土/早期/徐变/试验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,傅琼华..微膨胀抗冲磨混凝土早期徐变理论与试验研究[J].中国水利水电科学研究院学报,2017,15(3):193-199,7.基金项目
中国博士后科学基金项目(2017M612154) （2017M612154）
中央级公益性科研院所基本科研业务费专项项目(Y415014) （Y415014）
江西省水利厅科技项目(KT201414,KT201606) （KT201414,KT201606）
