盐渍土地区混凝土耐久性评价参数的设计和选取

DESIGN AND CHOICE OF DURABILITY ASSESSMENT PARAMETER OF CONCRETE IN SALTY SOIL REGION

对混凝土耐久性评价指标进行合理的优化设计,采用设计后的评价参数来表征混凝土在硫酸盐环境中的耐久性劣化过程。结果表明:评价参数能在同一坐标轴上显示混凝土各项性能的劣化程度;评价参数适用相同判定标准,判定法则简单、方便,更易于比较混凝土劣化过程中各项性能的变化过程和敏感程度;在实验室进行混凝土抗硫酸盐腐蚀试验时,宜选用无破损检测的两个评价参数进行结果评价。

After designing rationally the assessment targets on concrete durability,the assessment parameters are used to show the durability deterioration course of concrete in sulfate environment.The results show that every performance deterioration degree of concrete can be compared on the same coordination axis by assessment parameters.The assessment parameters are applicable to the same determination criterion,and the determination principle is simple and convenient.The comparing of the deterioration course and sensitivity degree of concrete performance is much easy.If concrete performance of anti-sulfate erosion is tested at laboratory,the result assessment ought to be done by the two non-destructive test assessment parameters.