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Permeability indices and corrosion resistance of geopolymer and Portland cement concretes

机译:地质聚合物和硅酸盐水泥混凝土的渗透性指数和耐腐蚀性

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Along with the strength and durability of construction materials, the environmental aspects of using these materials have to be taken into consideration. Geopolymer concrete is a new generation of 'green' concrete, mainly made from waste materials and aluminosilicate binder. The main objective of this work was to study the permeability indices such as water penetration depth, water absorption and voids ratio as well as the corrosion resistance of geopolymer concrete. The parameters considered were the molarity of the alkaline activator (sodium hydroxide), the alkaline solution binder ratio, the binder material content, curing temperature, cement addition and silica fume addition. The performances of geopolymer concrete and hydraulic Portland cement concrete were also compared. From the test results, in terms of the permeability indices, the optimum parameter values were found to be a molarity of 16, an alkaline activator to binder ratio of 0.40, binder materials content of 450 kg/m(3) and a curing temperature of 70 degrees C for 48 h duration. The addition of cement or silica fume was found to improve the performance of the geopolymer concrete. At the same compressive strength, the geopolymer concrete achieved better water permeability resistance and corrosion resistance than Portland cement concrete.
机译:除了建筑材料的强度和耐用性外,还必须考虑使用这些材料的环境方面。地质聚合物混凝土是新一代的“绿色”混凝土,主要由废料和铝硅酸盐粘合剂制成。这项工作的主要目的是研究渗透系数,例如透水深度,吸水率和空隙率,以及地聚合物的耐蚀性。所考虑的参数是碱性活化剂(氢氧化钠)的摩尔浓度,碱性溶液粘合剂比率,粘合剂材料含量,固化温度,水泥添加和硅粉添加。还比较了地聚合物混凝土和水硬硅酸盐水泥混凝土的性能。从测试结果看,就渗透率指数而言,最佳参数值是摩尔浓度为16,碱性活化剂与粘合剂的比例为0.40,粘合剂材料含量为450 kg / m(3)和固化温度为。 70摄氏度,持续48小时。发现添加水泥或硅粉可改善地质聚合物混凝土的性能。在相同的抗压强度下,地聚合物混凝土比波特兰水泥混凝土具有更好的耐水渗透性和耐腐蚀性。

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