温拌施工高性能沥青混合料性能研究
发布时间:2018-01-24 08:00
本文关键词: 温拌技术 PR LT 沥青混合料 拌和与压实温度 路用性能 汉堡车辙 出处:《长安大学》2015年硕士论文 论文类型:学位论文
【摘要】:沥青路面以其良好的路用性能而备受青睐,目前我国大部分路面均采用沥青路面。然而随着沥青路面大范围推广应用,其诸多弊端也不断显现出来。随着沥青温拌技术的不断发展和完善,正逐渐改善沥青路面所存在的诸多缺陷。工程经验表明,目前所广泛采用的温拌技术和产品仍然存在不足。基于此,本次研究选用PRI公司生产新型低温施工高性能添加剂(PR LT)作为试验研究对象,主要研究该添加剂对沥青混合料路用性能的影响效果,为该产品的应用提供理论参考。首先,采用SGC旋转压实试验,以体积指标为控制指标,确定了PR LT温拌基质沥青混合料和PR LT温拌SBS沥青混合料的拌和与压实温度,并与Sasobit、Aspha-Min以及HH-XⅡ型温拌剂的降温效果进行了对比,结果显示,PR LT的降温效果最明显,约降低25℃左右;通过室内模拟摊铺和压实过程,建立了温度-时间曲线,分析了PR LT沥青混合料的有效压实时间,结果表明,PR LT可有效延长沥青混合料的有效压实时间。其次,依据不同掺量PR LT对SBS沥青混合料路用性能的影响效果,确定出该添加剂的最佳掺量;与其他三种温拌剂的路用性能进行了对比,结果显示,PR LT低温稳定性和水稳定性改善效果明显,而高温稳定性最差;将PR LT对基质沥青混合料和改性沥青混合料路用性能的改善效果进行了对比,结果表明,两种沥青混合料的水稳定性提高幅度基本相同,SBS沥青混合料低温稳定性的提高幅度优于基质沥青混合料,而基质沥青混合料的高温稳定性改善效果远远优于SBS沥青混合料。再次,以汉堡车辙仪加载系统为平台,通过成型合理大小和厚度的试件进行试验,评价温度、水、加载频率、荷载、水-温度耦合以及水-荷载耦合环境对沥青混合料抗车辙性能的影响,结果表明,高温、水、荷载和加载频率均对车辙的发生和发展有显著影响,且水-温度耦合作用和水-荷载耦合作用进一步加剧了车辙的发生和发展。同时将PR LT与JL-PM01A和PR PLASTS抗车辙剂的抗车辙效果进行对比,结果显示,PR LT可达到与国产JL-PM01A抗车辙剂相同的改善效果。最后,借鉴工程经验,归纳总结了PR LT温拌施工的关键技术,同时对PR LT温拌沥青混合料的施工便利性和节能减排等社会经济效益进行综合分析。
[Abstract]:Asphalt pavement is very popular for its good road performance. At present, most of the pavement in China use asphalt pavement. However, with the extensive application of asphalt pavement. With the continuous development and improvement of asphalt warm mixing technology, the defects of asphalt pavement are gradually improved. Engineering experience shows that. At present, the widely used warm mixing technology and products are still inadequate. Based on this, PRI company is selected to produce a new low temperature construction high performance additive (LTPR) as the experimental research object. This paper mainly studies the effect of the additive on the pavement performance of asphalt mixture, and provides a theoretical reference for the application of the product. Firstly, the SGC rotary compaction test is adopted, and the volume index is taken as the control index. The mixing and compaction temperature of PR LT warm mixed base asphalt mixture and PR LT warm mixed SBS asphalt mixture were determined, and the compaction temperature of PR LT warm mixed SBS asphalt mixture was also determined. The cooling effects of Aspha-Min and HH-X 鈪,
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