不同聚合物改性剂对沥青混合料长期抗车辙和抗裂性能的影响分析

Effects of Different Polymer Modifiers on Long-term Rutting and Cracking Resistance of Asphalt Mixture

为评价不同聚合物改性沥青混合料的长期性能,文中选择了3种改性剂来改性沥青混凝土,即高粘度改性剂(HVM)、高模量改性剂(HMM)和抗车辙剂(ARA),检测不同聚合物改性混合物在不同老化条件下的变形和抗裂性。试验结果表明,随着时效程度的加深,所有混合料的抗裂性逐渐下降,表明时效削弱了沥青混合料的抗裂性,抗车辙剂的抗车辙性最好,不同聚合物改性剂因聚合物含量和改性剂类型而具有不同的老化敏感性。

In order to evaluate the long-term performance of asphalt mixutres modified by different polymers,three modifiers were selected to modify asphalt concrete,namely,high viscosity modifie(r HVM),high modulus modifie(r HMM)and anti-rut agen(t ARA).Check the deformation and crack resistance of different polymer modifiedm ixtures under different aging conditions.The test results show that the crack resistance of all mixtures decreases gradually with the increase of aging degree,which indicates that aging weakens the crack resistance of asphalt mixtures.The rutting resistance of anti-rutting agentis the best.Meanwhile,different polymer modifiers have diffeernt aging sensitivity due to polymer content and modifier type.