摘要
为研究不同强度等级混凝土在负(低)温条件下的抗压强度发展规律,对不同负(低)温条件下、不同养护龄期的C25,C30,C35,C40混凝土进行抗压强度试验,研究了负(低)温条件下混凝土抗压强度增长规律及其影响因素,建立了负(低)温条件下混凝土抗压强度发展规律的数学模型。研究表明:在恒定负(低)温条件下,混凝土抗压强度值随着混凝土强度等级的提高而增大,随着养护温度的降低而减小,但混凝土抗压强度增长速率与养护温度关系不大;C25,C30,C35,C40混凝土在负(低)温条件下抗压强度的发展遵循对数函数规律。
The paper carried out com pressive tests to C 25,C 30,C 35 and C 40 concrete specimens,which standed at different curing stages and negative（ low） temperatures to study the development law of their compressive strength.It identified the influential factors and builded up the math model in this regard. The results showed that as the temperature stays invariably negative,the increase of compressive performance can be realized by bringing up the strength grades of the specimens or by lowering the curing temperature,which on the other hand stands as an insignificant factor to the increase rate of such strength. The compressive performance of all specimens at negative temperature can be concluded by logarithmic functions.
出处
《铁道建筑》
北大核心
2016年第2期162-165,共4页
Railway Engineering
基金
国家电网公司科技部计划项目(HQ-2013-S-EX-018)
中国中铁股份有限公司科技研究开发计划项目(2012-重大-7)
关键词
负(低)温
混凝土
抗压强度
数学模型
Negative（low） temperature
Concrete
Compressive strength
Math model
