机制砂混凝土抗滑性能的影响因素分析

Analysis of Influence Factors on Anti-sliding Performance of Manufactured Sand Concrete

为了研究机制砂混凝土路面抗滑性能的影响规律,采用摆式摩擦法与表面回弹法,研究了水灰比、砂率、机制砂掺率、石粉含量等因素的影响,基于灰色系统理论对各影响因素进行了重要性排列。研究表明,机制砂抗滑性能低于天然河砂,石粉会显著改变机制砂混凝土的表观构造,各影响因素之间灰色关联排序为砂率>水灰比>石粉含量>机制砂掺率,根据以上结论设计了机制砂混凝土抗滑性能预测模型,经验证此模型与试验实测值相关性较好。

In order to study the influence law of anti sliding performance of manufactured sand concrete pavement,the influence of water cement ratio,sand ratio,manufactured sand mixing ratio,stone powder content were studied by British pendulum number(BPN)and surface rebound method,and the importance of each influencing factor is arranged based on the grey system theory.The results show that the anti sliding performance of manufactured sand is lower than that of natural river sand,and stone powder can signi-ficantly change the apparent structure of manufactured sand concrete.The order of grey correlation among the influencing factors is sand ratio>water cement ratio>stone powder content>mixing ratio of Manufactured Sand.According to the above conclusions,the prediction model of anti sliding performance of manufactured sand concrete is designed,and the results show that the model has a good correlation with the experimental data.