【摘要】：通過彎曲試驗和凍斷試驗研究了經(jīng)受紫外老化前后的布敦巖瀝青(BRA)改性瀝青混合料的低溫抗裂性能,結(jié)果表明:紫外老化前BRA改性瀝青混合料破壞應(yīng)變比基質(zhì)瀝青混合料提高248μξ,凍斷溫度降低0.2℃,變化均不大;紫外老化后BRA改性瀝青混合料比基質(zhì)瀝青混合料提高1 310μξ,提高幅度超過1倍。這表明,BRA改性瀝青混合料在多因素耦合作用下的低溫抗裂性能比基質(zhì)瀝青混合料更優(yōu),其路用性能衰變速率更慢。同時,結(jié)合試驗結(jié)果提出了瀝青混合料的開裂曲線,并嘗試建立了瀝青混合料的開裂計算模型。
[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，

本文編號：2313737