水性环氧树脂改性乳化沥青微表处性能

发布时间：2018-01-12 16:12

本文关键词：水性环氧树脂改性乳化沥青微表处性能　出处：《长安大学学报(自然科学版)》2017年05期 　论文类型：期刊论文

【摘要】：为评价水性环氧树脂改性乳化沥青微表处的性能,采用先乳化后改性的方法制备水性环氧树脂改性乳化沥青,利用三因素三水平正交试验确定最佳油水比、乳化剂掺量和水性环氧树脂掺量,并以其作为微表处胶结料。通过1h湿轮磨耗试验(WTAT)和负荷轮黏附砂试验(LWT)测定5组不同油石比微表处的磨耗值和黏附砂量,根据磨耗值或黏附砂量与油石比曲线交点确定微表处最佳油石比。采用6dWTAT、摆值试验和渗水试验分别评价微表处的抗水损坏、抗滑性能和防水性能,通过轮辙变形试验判定水性环氧树脂改性乳化沥青微表处可用于车辙填补,并利用车辙填补试验和罩面车辙试验评价微表处的抗车辙性能。研究结果表明:水性环氧树脂改性乳化沥青最佳油水比为65∶35,乳化剂掺量(质量分数,下同)为1.4%,水性环氧树脂掺量为4%,微表处最佳油石比在6.7%附近;微表处抗水损坏性能满足磨耗值不大于800g/m2的技术要求,抗滑性能满足摆值不小于70BPN的技术要求,且其高出技术要求,能为行车提供较好的摩擦力;经碾压养生后的微表处渗水系数为0,防水效果好;同时,微表处的宽度变形率和车辙深度率较小,可用于路面早期压密性车辙填补(不宜用于结构性车辙填补),经过微表处罩面后能显著提高路面的高温抗变形能力,有效恢复路面平整度。
[Abstract]:For the performance evaluation of modified emulsified waterborne epoxy resin asphalt micro surfacing, the emulsified modified method for preparing waterborne epoxy resin modified asphalt emulsion, determine the best ratio of oil to water by using three factors and three levels orthogonal test, emulsifier content and water content of epoxy resin, which is micro table at the binder. By 1H wet abrasion test (WTAT) and load wheel adhesion sand test (LWT) were measured in 5 groups of different asphalt aggregate ratio micro surfacing wear value and adhesion sand content, according to the abrasion value or adhesion and sand content of asphalt aggregate ratio curve intersection determination of micro surfacing. The optimum asphalt aggregate ratio by 6dWTAT, set the value test and seepage test were evaluated for micro surfacing anti water damage, anti sliding performance and waterproof performance, test determination of waterborne epoxy resin modified asphalt emulsion can be used in micro surfacing rut through rut deformation, and the use of rut test and surface rutting test evaluation of micro table The anti rutting performance. The results show that waterborne epoxy resin modified asphalt emulsion optimal oil-water ratio is 65: 35, emulsifier dosage (mass fraction, the same below) is 1.4%, the waterborne epoxy resin content is 4%, the optimum asphalt aggregate ratio of micro surfacing in the vicinity of 6.7% micro surfacing; resistance to water damage to meet the requirements of the wear value of not more than 800g/m2, the anti slide performance meet the requirements set value of not less than 70BPN, and the higher technical requirements, can provide better friction for driving; compacted health after micro surface water seepage coefficient is 0, good waterproof effect; at the same time, the micro surfacing width deformation the rate and the rutting rate is low, can be used for pavement compaction of rut (not for structural rut), after the micro surfacing overlay can significantly improve the pavement temperature anti deformation ability, effectively restore the pavement roughness.

【作者单位】：北京建筑大学土木与交通工程学院;北京建筑大学北京未来城市设计高精尖创新中心;中咨公路养护检测技术有限公司;
【基金】：国家自然科学基金项目(51478028) 北京市教育委员会市属高校创新能力提升计划项目(PXM2015-014210-000003) 北京市百千万人才工程项目
【分类号】：U414
【正文快照】： 北京100044;3.中咨公路养护检测技术有限公司,北京100089)0引言随着中国公路由建设为主进入了“建养并举”的新阶段,路面维修养护技术,尤其是路面的预防养护技术需求十分迫切[1]。微表处作为预防性养护的技术手段之一,可以有效地改善路面的使用性能,提高路面摩擦和防水性能,并

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