基于模糊决策理论的衬砌混凝土胶凝材组成优化研究

Research on Optimized Composition of Lining Concrete Cementing Material Based on Fuzzy Decision Theory

在胶凝材中掺入矿物掺合料是实现混凝土高性能的一条必要途径。混凝土的高性能主要包括高工作性能、高力学性能和高耐久性能,因此混凝土性能的评价指标和影响因素是多方面的,故很难依据诸多评价指标直观判断混凝土综合性能的优劣。通过对不同矿物掺合料配方胶凝材混凝土性能试验以及成本核算,对比分析矿物掺合料种类和掺量对混凝土性能以及工程造价的影响,并利用模糊多属性决策理论对混凝土性能进行综合评价,从中优选出适用于侵蚀环境条件下隧道衬砌高性能混凝土胶凝材配方(即矿物料合料掺入种类和掺量范围)。试验和理论分析表明:多掺矿物掺合料混凝土综合性能最优,复掺矿粉、粉煤灰混凝土性能次之,又因矿粉和粉煤灰是炼钢、发电等工业副产品,将其等量掺入水泥中,可大大节约资源,有效利用了工业废料,实现节能减排。

It is a necessary way to make high performance concrete by mixing it with mineral admixture in cementing material.Concrete＇s high performance mainly includes work performance,mechanical properties and durability.There are many aspects in concrete performance evaluation index and factors will influence the performance.It is hard to tell directly concrete＇s comprehensive performance only with the existing evaluation index.Through doing performance tests and cost accounting of cementing materials with different mineral admixture formulae,comparing and analyzing the influence of different types and dosage of mineral admixtures on the concrete performance and engineering cost,and making use of fuzzy multi-attribute decision theory,optimal cementing material formula（referring to the most appropriate type and dosage of mineral admixture） suitable for tunnel erosion environment conditions can be chosen.Analysis of test results and the relevant theories shows that the comprehensive performance of the concrete with multiple addition mineral admixtures is better than that of the concrete with composite addition mineral powder and fly ash.Mixing mineral powder and fly ash,which are the by-products of steelmaking and power generation,of equal proportions in concrete can save energy and reduce emissions because it saves resources to a great extent by making efficient use of industrial waste.