基于温拌技术的PVA纤维沥青配伍性及抗裂研究  

Compatibility and Crack Resistance of PVA Fiber AsphaltBased on Warm Mixing Technology

作　　者：赵阳[1,2] 梁乃兴 贾晓东[2] ZHAO Yang;LIANG Naixing;JIA Xiaodong(School of Civil Engineering,Chongqing Jiaotong University,Chongqing 400074,China;School of Urban Construction Engineering,Chongqing Technology and Business Institute,Chongqing 400052,China)

机构地区：[1]重庆交通大学土木工程学院,重庆400074 [2]重庆工商职业学院城市建设工程学院,重庆400052

出　　处：《重庆交通大学学报（自然科学版）》2023年第3期65-70,共6页Journal of Chongqing Jiaotong University(Natural Science)

基　　金：重庆市自然学科基金面上项目(cstc2020jcyj-msxmX0320);重庆市教委科学技术研究项目(KJQN202104006);重庆工商职业学院校级科研一般项目(NDYB2021-15);重庆工商职业学院校级科研重点项目(NDZD2020-01)。

摘　　要：针对聚乙烯醇(PVA)纤维在常规热拌(160~170℃)温度下会发生卷曲、缩短、脱水醚化的缺陷,结合温拌技术,探索PVA纤维在130~170℃下的耐热性,研究PVA纤维与沥青配伍性问题。同时采用复合材料界面理论,通过测试接触角,计算PVA纤维、分散粉体表面能参数,确定最优分散粉体,提出PVA纤维与分散粉体的最佳配比,并采用质量变异系数法对其分散均匀性进行评价。研究表明:通过温拌降温技术处理后的PVA纤维与沥青具有配伍性,其沥青混合料其抗裂性能与常规热拌沥青混合料相比提升了54%,PVA纤维在沥青混合料中起到稳定、吸附、加筋等作用,填补了PVA纤维运用于沥青混合料的空白。Aiming at the defects of crimping,shortening,dehydration and etherification of polyvinyl alcohol(PVA)fiber in hot mixing(160~170℃),the heat resistance performance of PVA fiber at 130~170℃and the compatibility of PVA fiber-asphalt was studied.Based on the interface theory of composite materials,the dispersed powder was optimized by calculating the contact angle and surface energy of PVA fiber,and the optimal ratio of PVA fiber and best dispersed powder was put forward.The dispersion uniformity was evaluated by mass variation coefficient method.The research shows that the PVA fiber processed by warm mix asphalt technology has compatibility with asphalt,and the anti-cracking performance of the asphalt mixture is improved by 54%compared with the hot mix asphalt mixture.PVA fiber plays the role of stabilization,adsorption and reinforcement in the asphalt mixture,which fills the blank of PVA fiber used in the asphalt mixture.

关 键 词：道路工程 PVA纤维 温拌 表面能 均匀性 

分 类 号：U414.1[交通运输工程—道路与铁道工程]