半刚性基层材料路用性能的试验研究  

Experimental Study on the Performance of Semi-rigid Base Course Materials

作　　者：王宏畅[1] 黄晓明[1] 傅智[2] 

机构地区：[1]东南大学交通学院,江苏南京210096 [2]交通部公路科学研究所,北京100088

出　　处：《公路交通科技》2005年第11期45-49,共5页Journal of Highway and Transportation Research and Development

基　　金：西部交通建设科技项目(200131822370-(1))

摘　　要：通过室内试验,研究了3种半刚性基层材料(水泥碎石、水泥粉煤灰稳定碎石、二灰碎石)的强度特性、断裂韧度、干缩特性及疲劳性能,比较了它们的路用性能。试验结果表明:半刚性基层材料的断裂韧度与弯拉强度具有一定的相关性;二灰碎石与水泥类稳定碎石相比,强度和断裂韧度较低,干缩性能和疲劳性能较好;水泥类稳定碎石抗弯拉强度比二灰碎石高,可弥补其疲劳寿命衰减过快的不足;用粉煤灰代替部分水泥,有广泛的工程应用前景。In this paper, the performances of three kinds of semi-rigid base course materials, cement stabilized crushed stones （CSCS）, cement-fly ash stabilized crushed stones （CFSCS） and lime-fly ash stabilized crushed stones （LFSCS）, were tested and studied, including the strength, fracture toughness and fatigue. The performance of dry shrinkage was also tested. It can be concluded from the results that： （1） The fracture toughness of semi-rigid materials has some relativity to the flexural strength. （2） Compared with CSCS, LFSCS was lower in strength and fracture toughness and better in dry shrinkage and fatigue performance. （3） The flexural strength of cement stabilized materials is greater than that of LFSCS.To some extent, it can make up for its defect of fast declining of fatigue life. （4） Replacing some cement with fly ash is effective so it has the prospect of extensive use in engineering.

关 键 词：半刚性基层 路用性能 断裂 干缩 疲劳 

分 类 号：U416.223[交通运输工程—道路与铁道工程]