沥青混凝土路面施工控制探讨
2012-10-15姜成祥蒋方君
姜成祥 蒋方君
摘要:沥青混凝土路面必须具有的坚实、平整、抗滑、耐久的品质,同时还应具有高温抗车辙、低温抗开裂、抗水害以及防止雨水渗入基层的功能。由于各方面因素,我国的公路建设起步晚、技术力量相对欠缺,随着我国经济的发展,车辆数量呈几何倍数增加,对公路历程及技术指标要求也越来越高,沥青混凝土路面具有行车舒服、噪音低、施工周期短、养护方便等优点,因此得到了广泛应用;同时车辆超载的问题也日益加重,造成了沥青混凝土路面的损坏和病害。本文就怎样有效的提高沥青路面施工质量,避免施工质量安全隐患主要从施工控制方面进行了简单阐述。
关键词:沥青混凝土;路面施工
Abstract: the asphalt concrete pavement must have the solid, level off, sliding, durable quality, also should have high temperature anti-rutting, low temperature resistance, resistance to cracking and prevent the rain sank into the water hazards of function. Because of various factors, our country's highway construction starting late, the technique power relative lack, with the development of our national economy, vehicle shows geometrical increase the number of highway course requirements and technical index more and more is also high, with driving comfortable of asphalt concrete pavement, low noise, and shorter construction period, convenient maintenance, so it has been widely used; And the problem of overloaded vehicles is getting worse, caused the damage of asphalt concrete pavement and diseases. This paper discusses how to improve the efficiency of the asphalt pavement construction quality, avoid the construction quality safe hidden trouble from the main construction control in this simple.
Keywords: asphalt concrete; Pavement construction
中图分类号:TU37文献标识码:A 文章编号:
一、原材料质量控制
1、沥青材料
根据室内马歇尔试验稳定度、车辙试验动稳定度指标评价,选择采用改性沥青将在一定程度上增强沥青混凝土结构离、低温稳定性能,改性沥青沥青混凝土路段实际使用过程中也表现出明显优势。
2、集料材料
经过车辙试验确认,使用机制砂比使用天然砂可增加动稳定度一倍以上,因此要求沥青混凝土结构采用机制砂作为细集料以增加结构内部摩阻力,提高结构稳定性。集料质量日常检测应严格按要求的检测项目和检测频率进行。
3、填料材料
沥青混凝土填料应选择干燥、磨细的石灰石粉,石灰石粉质量应满足《公路工程施工技术规范》要求,0.075mm通过率不得小于75%,不得使用拌和楼回收粉尘,同时使用矿粉不宜过细。……