低温环境对混凝土强度影响试验研究

Experimental research on influence of low temperature environment on concrete strength

混凝土强度发展与环境温度和湿度有密切的关系,夏季高温湿度大,混凝土实体工程强度增长快,而冬季温度低天气干燥,混凝土强度增长慢,甚至到600多天混凝土强度也达不到要求,本次研究针对加入防冻剂的混凝土早、中、后各龄期在不同温度下强度增长率进行系统试验,通过在5℃、0℃、-5℃、-10℃、-15℃五个温度跨度及低温养护、标准养护、同条件养护三个养护条件下的试验,最后分析出加入防冻剂的混凝土在有无预养条件下强度的区别及都有预养条件下不同温度对混凝土强度的影响。

The development of concrete strength is closely related to the ambient temperature and humidity. In summer, high temperature and humidity increase the strength of concrete concrete projects, while in winter, the temperature is low and the weather is dry, and the strength of concrete increases slowly, even at 600 degrees. According to the requirements, this study systematically tests the strength growth rate of concrete with antifreeze at different temperatures at the early, middle and late ages. A temperature span and tests under three curing conditions: low temperature curing, standard curing and same-condition curing, and finally analyze the difference in strength of concrete with or without pre-curing, and the effects of different temperatures on concrete under pre-curing conditions. Influence of strength.