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根据已有实验数据,借助灰关联熵分析的手段,定量分析了水胶比、胶凝材料用量、粉煤灰掺量、砂率、粗集料最大粒径和减水剂用量等道路混凝土配合比设计参数对道路混凝土抗交变应力与硫酸盐溶液腐蚀耦合作用的综合影响的显著性程度。经分析计算得出:对水泥混凝土耐腐蚀疲劳影响最大的是水胶比和减水剂用量,其次为砂率,胶凝材料用量,粗集料最大粒径和粉煤灰掺量。在道路高性能混凝土配合比设计中,满足工作性条件下,采用高效减水剂降低水胶比有利于提高道路混凝土抵抗交变荷载作用下硫酸盐侵蚀的能力。
According to the existing experimental data, the method of gray correlation entropy analysis was used to quantitatively analyze the water-cement ratio, the amount of cementitious material, the content of fly ash, the sand ratio, the maximum particle size of coarse aggregate and the amount of water reducer Than the design parameters on the road concrete anti-alternating stress and sulfate solution corrosion coupling effect of the comprehensive significance of the degree of significance. The analysis and calculation result shows that the ratio of water to binder and the amount of superplasticizer are the most important factors affecting the corrosion resistance of cement concrete, followed by the rate of sand, the amount of cementitious material, the maximum particle size of coarse aggregate and the content of fly ash. In the mix design of road high performance concrete, under the working conditions, the use of high efficiency water reducer to reduce the water-cement ratio is conducive to improving the ability of road concrete to resist sulfate attack under alternating load.