布敦岩沥青改性沥青混合料低温抗裂性能试验研究
发布时间：2018-11-06 08:28
【摘要】：通过弯曲试验和冻断试验研究了经受紫外老化前后的布敦岩沥青(BRA)改性沥青混合料的低温抗裂性能,结果表明:紫外老化前BRA改性沥青混合料破坏应变比基质沥青混合料提高248μξ,冻断温度降低0.2℃,变化均不大;紫外老化后BRA改性沥青混合料比基质沥青混合料提高1 310μξ,提高幅度超过1倍。这表明,BRA改性沥青混合料在多因素耦合作用下的低温抗裂性能比基质沥青混合料更优,其路用性能衰变速率更慢。同时,结合试验结果提出了沥青混合料的开裂曲线,并尝试建立了沥青混合料的开裂计算模型。
[Abstract]:The low temperature cracking resistance of Budun rock asphalt (BRA) modified asphalt mixture before and after UV aging was studied by bending test and freezing breaking test. The results show that the failure strain of BRA modified asphalt mixture is 248渭 尉 higher than that of base asphalt mixture before UV aging, and the freezing temperature is reduced by 0.2 鈩，
本文编号：2313737
[Abstract]:The low temperature cracking resistance of Budun rock asphalt (BRA) modified asphalt mixture before and after UV aging was studied by bending test and freezing breaking test. The results show that the failure strain of BRA modified asphalt mixture is 248渭 尉 higher than that of base asphalt mixture before UV aging, and the freezing temperature is reduced by 0.2 鈩，
本文编号：2313737
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