水泥煤渣稳定煤矸石基层材料温缩性能的试验研究

Test Research on Temperature Shrinkage Performance of Cement and Cinder Stabilized Coal Gangue Base Course Materials

为了探讨水泥煤渣稳定煤矸石基层材料对于环境温度变化的敏感性以及应用于寒冷地区道路路面基层的可行性,采用电测法试验研究了其温缩性能,以水泥煤渣稳定未燃煤矸石为例,探讨了水泥剂量对温缩系数的影响。结果表明,水泥煤渣稳定煤矸石基层材料的温缩性能随温度呈规律性变化,水泥煤渣稳定未燃煤矸石在-10^-20℃时温缩系数最大,而水泥煤渣稳定自燃煤矸石在10~0℃时温缩系数最大;平均温缩系数随水泥剂量的增加先减小后增大,大致呈一凹形抛物线,在水泥剂量为5%左右时温缩系数最小。与水泥稳定碎石和水泥稳定砂砾的温缩性能对比分析结果表明,水泥煤渣稳定煤矸石基层材料具有较小的温缩系数,适合于用作寒冷地区道路的路面基层。

In order to discuss sensitivity towards environmental temperature and feasibility used in base course of highway in cold areas, temperature shrinkage performance of cement ＆ cinder stabilized coal gangue base course materials is studied through using resistance strain-gauge testing method, and influence of proortion of cement on temperature shrinkage coefficient is discussed with taking cement ＆ cinder stabilized unburned coal gangue as an example. The result shows that temperature shrinkage performance of cement ＆ cinder stabilized coal gangue base course materials changes disciplinarianly with temperature, temperature shrinkage coefficient of cement ＆ cinder stabilized unburned coal gangue reaches its maximum at temperature between - 10 ℃ and - 20 ℃, and cement ＆ cinder stabilized burned coal gangue reaches its maximal temperature shrinkage coefficient when at temperatare between 10℃ and 0 ℃. Along with proportion of cement＇s increase, the average temperature shrinkage coettScient decrease until 5%, and then increase, whose curve likes an concave parabola approximately. Coparison between cement ＆ cinder stabilized coal gangue and cement stabilized macadam or cement stabilized gravel shows that cement ＆ cinder stabilized coal gangue base course materials have less temperature shrinkage coefficient, which are propitious to pavement base course in cold areas.