摘要
扬州西北绕城高速公路所处地区交通量大,特别是超重车辆日益增多,夏季炎热多雨,冬季寒冷,需要严格控制其路面质量,充分发挥各结构层材料最大效能,才能提高道路的使用性能。本文通过试验研究膨胀剂对水泥稳定碎石干缩的影响以及降低基层裂缝率的效果。对比不同剂量膨胀剂对水泥稳定碎石收缩裂缝的抑制效果,并进行试验路的铺筑,跟踪观测裂缝的发生规律。由试验及调查的裂缝结果得出的结论是:不掺加膨胀剂的水泥稳定碎石基层具有较高的裂缝率,膨胀剂的掺入对于降低水泥稳定碎石的裂缝有明显作用,并且在一定范围内,其效果随膨胀剂掺量的增加而增加。
Yangzhou Northwest Ring Expressway, where traffics are heavy, some of which are overweight vehicles, summer is hot and rainy, winter is cold, has the need for strict quality control and taking full advantages of maximum effectiveness of all structure materi- als to improve pavement performance. Effects of expansive agents on cement stabilized base and effectiveness of lowering shrinkage crack ratio are studied by some tests. Test road is also paved to observe occurrence of shrinkage cracks on cement stabilized base. From test results and observation of test road, some conclusions can be drawn： cement stabilized base without expansive agent has high shrinkage crack ratio. Expansive agent can play an important role in lowering shrinkage crack of cement stabilized base. And its effec- tiveness can be improved with more content of expansive agents.
出处
《内蒙古农业大学学报（自然科学版）》
CAS
北大核心
2009年第1期163-169,共7页
Journal of Inner Mongolia Agricultural University(Natural Science Edition)
关键词
道路工程
水泥稳定碎石
膨胀剂
裂缝率
Highway engineering
cement stabilized base
expansive agent
shrinkage crack ratio
