添加改性水库淤泥的沥青混凝土路用性能  

Study of Modified Reservoir Silt Asphalt Concrete Performance

作　　者：张华 陈金山 张斌 

机构地区：[1]福州市规划设计研究院,福建福州350003 [2]福州农林大学交通与土木工程学院,福建福州350003 [3]福州市规划设计研究院交通所,福建福州350003

出　　处：《大连交通大学学报》2016年第2期77-81,87,共6页Journal of Dalian Jiaotong University

基　　金：重庆交通大学国家山区公路工程开放基金资助项目(20131416)

摘　　要：采用密级配沥青混凝土,先调制出0%、5%、10%、20%、N 10%（本段的比例为改性淤泥添加量在拌合沥青浆体中的重量百分比,N 10%为添加未改性水库淤泥者）五种拌合沥青浆体,再以这五种沥青浆体制作马歇尔试件,进行各项沥青混凝土工程性质试验,评估改性水库淤泥添加于沥青路面的可行性,并比较添加量不同的影响,以及改性水库淤泥及未改性水库淤泥在等量添加条件下,观察两者在试验性能的差异.综合试验结果,先将改性水库淤泥与沥青拌合,添加量越多使沥青浆体工作性降低,浆体包裹骨材不易且不均匀,粒料间黏结力下降,进而影响到各项试验结果表现.添加改性水库淤泥后,马歇尔稳定度略微提升,流值则随着添加量增加而下降,回弹模量则是随着添加量增加而上升,Cantabro磨耗率也因添加量增加而上升.在不同水侵害天数残余强度试验中,可看出改性水库淤泥添加后提升抗水侵害能力.改性水库淤泥添加量控制在5%~10%则会收到较佳的抗水侵害效果,又不至于使各项试验性能下降.改性水库淤泥确实比未改性者更能在沥青路面中提升抗水侵害能力.Using dense gradation asphalt concrete with diffrent additions of unmodified reservoir silt,five kinds of asphalt slurry system are used for making Marshall specimens,the engineering properties of the asphalt concrete are tested to assess the feasibility of the modified reservoir silt add in asphalt,and compare the influence of different addition,silt and unmodified and modified reservoir reservoir silt under the condition of equal amounts add. Comprehensive test results show that the slurry aggregate is not easy and uneven. After adding modified reservoir silt,Marshall stability is slightly ascended,and the flow value is decreased with the increase of adding amount. The modulus of resilience is increased with increasing the adding quantity,and cantabro abrasion rate also increased with increasing the adding amount. The modified reservoir silt content in 5% ~ 10%can receive better anti water damage effect,and it is better than the unmodified one to resist water damage in asphalt pavement.

关 键 词：密级配沥青混凝土 改性水库淤泥 抗水侵害 道路工程 

分 类 号：U414[交通运输工程—道路与铁道工程]