摘要
Abstract
In order to study and improve the durability of concrete components in highway bridges,this paper selected three commonly used high performance concrete,C30,C40 and C50,and conducted experiments to study the effects of different mixtures of coal fly ash on the compressive strength,carbonation resistance and anti-chloride penetration ability of high-performance concrete.The test results show that the increase of coal fly ash content on the compressive strength of high performance concrete is related to the age of concrete,and the optimum coal fly ash content is related to the grade of concrete.Coal fly ash can weaken the carbonation resistance of high performance concrete,and improve the anti-chloride penetration ability of high performance concrete,and the improvement effect is related to the fly ash content.In practical engineering,the requirements for strength,carbonation resistance,and chloride ion penetration resistance should be comprehensively considered,as well as the selection of fly ash dosage based on material cost.关键词
公路桥梁/强度/耐久性/高性能混凝土/粉煤灰Key words
highway bridges/strength/durability/high-performance concrete/coal fly ash分类
交通工程
