钢纤维再生混凝土碳化深度影响因素研究

Study on Influencing Factors of Carbonation Depth of Steel Fiber Recycled Concrete

将钢纤维加入再生混凝土中能够有效解决再生混凝土耐久性差、强度低等问题。通过正交试验设计试件的配合比,对不同配合比试件的抗压等性能进行研究。分析影响钢纤维再生混凝土性能的主要因素,并通过10组不同配合比试件的碳化试验分析了影响钢纤维再生混凝土碳化深度的因素。研究表明:试件抗拉强度的主要影响因素为钢纤维体积率;工作性能的主要影响因素为再生骨料取代率、钢纤维体积率;抗压强度的主要影响因素为水胶比、再生骨料取代率;钢纤维体积率小于1.8%时,抗碳化性能随着钢纤维体积率的增加而增强;钢纤维体积率高于1.8%时,随着钢纤维体积率的增加,抗碳化性能略有降低。

It is possible to effectively solve the problem of poor durability and low strength of recycled concrete by adding steel fiber into recycled concrete.In this paper,the compressive strength of different test pieces is studied by orthogonal design.The main factors influencing the carbonation depth of the steel fiber were analyzed by the carbonation test system of 10 different combinations of test pieces.The results showed that the main influencing factors of the tensile strength of the steel were the steel fiber volume ratio,The main influencing factors of the performance are the replacement rate of recycled aggregate and the volume fraction of steel fiber.The main influencing factors of compressive strength are water-cement ratio and recycled aggregate ratio.When the steel fiber volume ratio is less than 1.8%,the carbon-Fiber volume ratio increased;steel fiber volume ratio higher than 1.8%,with the steel fiber volume rate increases,anti-carbonization performance slightly reduced.