复杂环境下混凝土耐久性评价模型

Evaluation of concrete durability under complex environment

已有的混凝土耐久性评估未能综合考虑多种因素的作用,与现场混凝土所处环境存在巨大差异,特别是对于矿区的复杂环境下混凝土寿命预测是工程实践中迫切需要解决的问题。在混凝土耐久性影响因素重要性的判断准则基础上,采用二元比较模糊决策分析法确定相应环境下耐久性影响因素的权重,提出年限法预测混凝土耐久性寿命,从而建立复杂环境下混凝土耐久性评价模型。通过对复杂环境下不同配合比混凝土的寿命预测对比,验证模型的适用性。

Current life prediction for durability of concrete failed to take the result of many factors into consideration, differing from the engineering applications enormously, and especially the life prediction under complex environment of mining area is an urgent problem in engineering practice.Based on the significance criterion on influence factors on concrete durability,the weight of each influence factor index in a specific environment is determined with the binary fuzzy comparison method,meanwhile the period method is proposed to establish the evaluation model of concrete durability under complex environment.By comparing the life prediction of concrete with different mix under complex environment, the applicability of the evaluation system proposed is verified.