为提升沥青的综合性能,采用废食用油对废胶粉进行活化处理,复配丁苯橡胶(SBR)制备复合改性沥青。采用响应面法中的Box-Behnken设计方法,分别对不同掺量废食用油、废胶粉、SBR制备的复合改性沥青进行三大指标和135℃旋转黏度性能测试,利用灰关联分析对沥青的性能进行综合评价,建立关联度的响应面数学模型,得出各改性剂的最优掺量。结果表明,选用响应面法-灰关联分析可以很好地对沥青改性剂的掺量进行优化;当废食用油掺量为10%、废胶粉掺量为10%、SBR掺量为5%时,制得的复合改性沥青综合性能最优,且关联度的预测值与实际值相对误差仅为2.45%,拟合程度较高。
In order to improve the comprehensive performance of asphalt,waste cooking oil was used to activate the waste crumb rubber and compounded with butadiene styrene rubber(SBR) to prepare composite modified asphalt.The Box-Behnken design method in the response surface methodology was selected to test and analyzed the three major indicators of asphalt and the rotational viscosity at 135°C.The correlation degree in the grey relation analysis was used to comprehensively evaluate the performance of the asphalt to establish a response surface with correlation degree mathematical model,thereby obtaining the optimal dosage of each modifier.The results showed that the selection of response surface methodology-grey relation analysis could optimize the content of asphalt modifiers.The optimal content of modifiers for the asphalt were:10% waste cooking oil,10% waste crumb rubber,5% SBR,the relative error between the predicted value and the actual value of the correlation degree was 2.45%,which showed a high degree of fit.
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基金资助
国家自然科学基金(51708092);中国博士后科学基金资助项目(2018M631894)
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