水利水电科技进展Issue(2)：42-45,94,5.DOI:10.3880/j.issn.1006-7647.2016.02.008
混凝土抗盐冻性能试验
Experimental study of frost-salt resistance of concrete
摘要
Abstract
In order to study the influence of concrete strength grade, volumes of fly ash and slag powder, and air-entraining content on the frost-salt resistance of concrete, an accelerated freeze-thaw test of concrete in salt solution was carried out. The correlation between the air-entraining contents of fresh concrete and hardened concrete was validated through measurement of bubble parameters of hardened concrete. The variation of surface characteristics, relative dynamic modulus of elasticity, and cumulative amount of spalling of concrete with the number of freeze-thaw cycles were investigated. The influence of concrete strength grade, volumes of fly ash and slag powder, and air-entraining content on the frost-salt resistance of concrete was examined. The results shows that a higher concrete strength does not always improve the frost-salt resistance, the air-entraining content is the decisive factor influencing the frost-salt resistance of medium-and low-strength grade concrete, and the volumes of fly ash and slag powder should be controlled within an appropriate range.关键词
混凝土/抗盐冻性能/盐溶液/剥落量/含气量/相对动弹性模量Key words
concrete/frost-salt resistance/salt solution/amount of spalling/air-entraining content/relative dynamic modulus of elasticity分类
建筑与水利引用本文复制引用
闫西乐,张萍,秦鸿根,庞超明,孙伟..混凝土抗盐冻性能试验[J].水利水电科技进展,2016,(2):42-45,94,5.基金项目
国家自然科学基金(51308112) （51308112）
江苏省交通厅科研项目(2010Y31) （2010Y31）
