高空环境下高强混凝土早龄期强度发展规律研究  

Study on strength development law of high strength concrete at early age in high altitude environment

作　　者：王明亮 王小安 WANG Mingliang;WANG Xiaoan(Shanghai Construction Group Co.,Ltd.,Shanghai 200080,China)

机构地区：[1]上海建工集团股份有限公司,上海200080

出　　处：《建筑结构》2021年第S01期1311-1315,共5页Building Structure

基　　金：上海市优秀技术带头人计划(2020XD1431800)

摘　　要：高强混凝土在自身特性、环境条件等多因素复合作用下,早龄期强度发展不足导致的开裂及承载能力问题日益突出。对C50和C60高强混凝土在标准养护温度20℃及高空低温5℃养护条件下的抗压强度发展进行试验研究,分析高强混凝土早龄期抗压强度及增长速率随龄期变化的发展规律,同时分析归纳国内外关于成熟度与强度相关的发展预测模型,对比分析了早龄期强度发展规律,最后对本文试验数据进行拟合分析,得出C50和C60高强混凝土在高空低温环境下的强度发展规律。The problem of cracking and bearing capacity caused by the insufficient development of early age strength of high strength concrete is becoming increasingly prominent under the combined action of its own characteristics,environmental conditions and other factors.In this paper,the compressive strength development of C50 and C60 high strength concrete under the standard curing temperature of 20℃and low temperature of 5℃is studied,This paper analyzes the development law of early age compressive strength and growth rate of high-strength concrete with age,analyzes and summarizes the development prediction models related to maturity and strength at home and abroad,compares and analyzes the development law of early age strength,and finally makes fitting analysis on the test data of this paper,and obtains the strength development law of C50 and C60 high-strength concrete under low temperature environment.

关 键 词：高强混凝土 早龄期 低温养护 抗压强度 预测模型 

分 类 号：TU528[建筑科学—建筑技术科学]