橡胶粉对嵌锁密实水泥混凝土强度特性的影响分析

发布时间：2018-09-10 19:42

【摘要】：以嵌锁密实水泥混凝土为基础,掺加废旧橡胶粉,使其不仅具有橡胶粉混凝土的优点,同时能够解决橡胶粉水泥混凝土强度不足问题,并通过橡胶粉表面处理使嵌锁密实水泥混凝土与橡胶粉水泥混凝土能够有效结合。采用橡胶粉等体积置换部分砂(10%、20%、30%),分析橡胶粉掺量以及橡胶粉种类(表面改性和未改性)对水泥混凝土的抗压强度和抗弯拉强度的作用。分别应用线性模型、对数抛物线性模型、对数S-logistic模型分析混凝土强度在不同橡胶粉掺量下的变化。试验结果表明:橡胶粉掺量和种类对混凝土的强度有显著的影响,总体是随着橡胶粉掺量的增加强度降低;线性模型能够较好地反映强度随着未改性橡胶粉掺量的变化趋势;对数S-logistic非线性模型可以更加准确地模拟改性橡胶粉掺量对强度变化的影响。
[Abstract]:Based on locking dense cement concrete and adding waste rubber powder, it not only has the advantages of rubber powder concrete, but also can solve the problem of insufficient strength of rubber powder cement concrete. The interlocking dense cement concrete and rubber powder cement concrete can be effectively combined by surface treatment of rubber powder. The effect of rubber powder content and rubber powder (surface modification and unmodified) on the compressive strength and flexural tensile strength of cement concrete was analyzed by replacing part of sand with equal volume rubber powder (10% or 20%). Linear model, logarithmic parabola model and logarithmic S-logistic model were used to analyze the change of concrete strength under different rubber powder content. The results show that the content and type of rubber powder have a significant effect on the strength of concrete, the overall strength decreases with the increase of rubber powder content, and the linear model can better reflect the change trend of strength with the content of unmodified rubber powder. The logarithmic S-logistic nonlinear model can more accurately simulate the influence of the content of modified rubber powder on the strength change.
【作者单位】：长安大学公路学院特殊地区公路工程教育部重点实验室;
【基金】：“十二五”国家科技支撑计划(2014BAG05B04)
【分类号】：U414

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