温拌再生沥青混合料的温度控制方法及路用性能

发布时间：2018-02-27 07:01

  本文关键词： 道路工程 沥青混合料 温拌 再生 温度控制 路用性能　出处：《长安大学学报(自然科学版)》2014年02期 　论文类型：期刊论文

【摘要】：为解决温拌再生沥青混合料(WMRA)设计与施工过程中的温度控制问题,提出了掺入Sasobit的WMRA的拌和与成型温度、新集料加热温度的确定方法,对WMRA和热拌再生沥青混合料(HMRA)进行Marshall试验、浸水车辙试验、低温弯曲试验和水稳定性试验,对比分析WMRA和HMRA的空隙率(VV)和路用性能。研究结果表明:提出的方法能够准确计算WMRA的拌和温度、成型温度和新集料加热温度;当再生利用废旧沥青路面材料(RAP)掺配比例较小且降低13℃成型时,WMRA与HMRA具有接近的空隙率,说明Sasobit的降温幅度约为13℃,能提高RAP的掺配比例近10.3%;与HMRA相比,WMRA具有更优的高温稳定性,具有相近的低温弯曲应变、残留稳定度和冻融劈裂强度比;WMRA和HMRA高温稳定性和低温抗弯拉强度均随着RAP比例的提高而增加,而低温弯曲应变、残留稳定度和冻融劈裂强度比均随着RAP比例的提高而降低。
[Abstract]:In order to solve the problem of temperature control in the process of design and construction of warm mix recycled asphalt mixture (WMRA), the method of determining the mixing and forming temperature and the heating temperature of new aggregate is put forward. Marshall test, immersion rutting test, low temperature bending test and water stability test were carried out on WMRA and hot mix recycled asphalt mixture. The results show that the proposed method can accurately calculate the mixing temperature, forming temperature and heating temperature of new aggregate for WMRA and HMRA. When the proportion of recycled asphalt pavement material (rap) is small and the ratio of WMRA to HMRA is reduced by 13 鈩，

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