泡沫沥青和水泥用量对冷再生沥青混合料路用性能的影响

发布时间：2018-05-07 02:05

本文选题：道路工程 + 泡沫(乳化)沥青冷再生混合料　；参考：《公路工程》2017年01期

【摘要】：为明确泡沫(乳化)沥青和水泥掺两种粘结材料对冷再生混合料路用性能和耐久性的影响,通过车辙试验、贯入剪切试验、低温弯曲试验、加速加载试验、四分点加载疲劳试验、研究了泡沫(乳化)沥青和水泥两种粘结材料对沥青路面冷再生混合料高低温性能、长期高温抗变形能力以及抗疲劳耐久性性能的影响。试验结果表明,泡沫(乳化)沥青冷再生混合料车辙变形量主要是压密变形所致,水泥掺量越大泡沫(乳化)沥青冷再生混合料抗高温性能和高温剪切疲劳性能越好;随着水泥、沥青粘结料掺量增大,冷再生混合料低温抗裂性能呈先增大后减小的变化趋势,对于泡沫(乳化)沥青冷再生混合料低温抗裂性能而言,存在一个最佳的泡沫(乳化)沥青和水泥用量,在2.0%~4.0%泡沫沥青和2.5%~4.5%乳化沥青用量下适宜的沥青粘结料与水泥掺量比例为1.5∶1~2.7∶1;对于泡沫(乳化)沥青冷再生混合料抗疲劳性能而言,存在一个最佳的沥青粘结料和水泥掺量,为确保冷再生混合料具有最优的抗疲劳性能需达到沥青结合料和水泥掺量的相对平衡,用于冷再生混合料适宜的水泥掺量为1.0%~2.0%。为完善泡沫(乳化)沥青冷再生混合料的材料组成设计方法以及性能评价体系提供了参考。
[Abstract]:In order to clarify the influence of foam (emulsified) asphalt and cement admixture on the pavement performance and durability of cold recycled mixture, the rutting test, penetration shear test, low temperature bending test and accelerated loading test were carried out. The effects of foam (emulsified) asphalt and cement binder on the high and low temperature performance, long term high temperature deformation resistance and fatigue durability of cold recycled asphalt pavement are studied. The results show that the rutting deformation of cold recycled asphalt mixture is mainly caused by compaction deformation, and the higher the cement content is, the better the high temperature resistance and shear fatigue performance of cold recycled asphalt mixture are. With the increase of cement and bituminous binder content, the low temperature crack resistance of cold recycled mixture increases first and then decreases. For foam (emulsified) bituminous cold recycled mixture, the low temperature crack resistance of cold recycled asphalt mixture increases firstly and then decreases. There is an optimal amount of foam (emulsified) asphalt and cement, The suitable ratio of bituminous binder to cement is 1.5: 1 / 2. 7: 1 under the ratio of 2.0% foamed asphalt and 2.5% emulsified asphalt to 2.5% emulsified asphalt. For the fatigue resistance of cold recycled foamed (emulsified) asphalt mixture, In order to ensure the optimum fatigue resistance of cold recycled mixture, the relative balance of asphalt binder and cement content should be achieved, and the suitable cement content for cold recycled mixture is 1.0% 2.0. It provides a reference for improving the material composition design method and performance evaluation system of foamed (emulsified) bitumen cold recycled mixture.
【作者单位】：呼伦贝尔市公路勘测规划设计有限公司;
【基金】：国家科技支撑计划项目(2014BAG05S61)
【分类号】：U414

【相似文献】