基于决策分析的多聚磷酸改性沥青原材料优选

Material optimization of polyphosphoric acid modified asphalt based on decision analysis

PPA改性沥青具有价格低廉、储存稳定性及高温稳定性好等优点,应用前景良好,而PPA与沥青间复杂的配伍性是阻碍PPA改性沥青应用的重要原因.为优选具有最佳改性效果的PPA改性沥青原材料,提出综合考虑沥青的高温性能、流变特性及低温性能,以层次分析-模糊数学法(AHP-FUZZY)建立PPA改性沥青原材料综合优选模型,优选具有最佳配伍性的基质沥青及PPA原材料.将所选取的原材料宏观性能测试结果带入模型计算得出各PPA改性沥青掺配方案的优越度,结果表明,壳牌90^(#)基质沥青与相对质量分数为115%的PPA配伍性最佳.

PPA modified asphalt has the advantages of low price,good storage and high-temperature stability,and has a good application prospect,however,the complex compatibility between PPA and asphalt is an important reason that hinders the application of PPA modified asphalt.To select the best modification effect of PPA modified asphalt materials,PPA modified asphalt materials comprehensive optimization model is established on the basis of the analytic hierarchy process(AHP)and fuzzy mathematics method to optimize the best compatibility of the matrix asphalt and PPA raw materials,considering the high temperature properties,rheological properties and low-temperature performance of asphalt.The test results of the selected macro performance of modified asphalt materials were taken into the model to calculate the superiority of each PPA modified asphalt mixing scheme.The results showed that the compatibility of Shell 90^(#)base asphalt with 115%PPA is the best.