水性环氧树脂增强灌浆复合混合料抗裂性能设计与评价  

Design and Evaluation of Anti-cracking Performance of Water-borneEpoxy Resin Reinforced Grouting Asphalt Mixture

作　　者：赵迁乔 徐君全 ZHAO Qian-qiao;XU Jun-quan(School of Civil Engineering,Qingdao University of Technology,Qingdao 266520,China;School of Civil Engineering Changsha,Central South University,Changsha 410083,China)

机构地区：[1]青岛理工大学土木工程学院,青岛266520 [2]中南大学土木工程学院,长沙410083

出　　处：《科学技术与工程》2025年第11期4754-4760,共7页Science Technology and Engineering

基　　金：国家自然科学基金(51808562);湖南省自然科学基金(2020JJ5723);浙江省公路与运输管理中心科技计划(2020H05)。

摘　　要：灌浆路面容易发生开裂问题,影响路面服役寿命。为此,在灌浆料中添加水性环氧树脂(water-borne epoxy resin, WER)来改善灌浆复合混合料的性能。制备不同WER含量的灌浆料,并对其流动性能、凝结时间、力学强度和微观形貌进行表征。通过车辙试验、低温弯曲试验和浸水马歇尔试验对灌浆复合混合料的路用性能进行评价。结果表明,WER可以在水化产物表面形成膜结构,有利于提高灌浆料的柔韧性,但会延迟灌浆料的凝结时间。WER的添加会小幅度降低灌浆复合混合料的高温性能,但能提高灌浆复合混合料低温抗裂性能和水稳定性。特别地,7.5%WER使灌浆复合混合料的低温破坏应变提高了29.2%。Grouting pavements are susceptible to cracking,which can significantly reduce their service life.For this reason,water-borne epoxy resin(WER)was added to the grouting materials to improve the performance of grouting asphalt mixtures.Grouting materials with different levels of WER were prepared and characterised for their flow properties,setting time,mechanical strength and micromorphology.The road performance of the grouting asphalt mixtures was evaluated through wheel tracking test,low-temperature bending test and water immersion Marshall test.The results show that,WER can form a membrane structure on the surface of hydration products,improving the flexibility of grouting materials.However,it also delays the setting time of grouting materials.The addition of WER slightly diminishes the high-temperature performance of grouting asphalt mixtures,but improves the low-temperature cracking resistance and water stability of grouting asphalt mixtures.In particular,7.5%WER increases the low-temperature destructive strain of grouting asphalt mixtures by 29.2%.

关 键 词：灌浆复合混合料 环氧树脂 灌浆料 路用性能 

分 类 号：U416.217[交通运输工程—道路与铁道工程]