粉煤灰对水泥稳定碎石抗冲刷性能的改善  

Ipmovement of anti-erosion performance of cement-sabilized aggregate by fly-ash

作　　者：邓云潮[1] 韩森[1] 徐鸥明[2] 高巍[3] 

机构地区：[1]长安大学特殊地区公路工程教育部重点实验室,陕西西安710064 [2]长安大学材料科学与工程学院,陕西西安710061 [3]长安大学新型路面研究所,陕西西安710064

出　　处：《广西大学学报（自然科学版）》2010年第1期143-146,共4页Journal of Guangxi University（Natural Science Edition）

基　　金：国家西部交通科技项目(200731822301-8);陕西省交通科技项目(05-05K)

摘　　要：针对水泥稳定碎石基层在使用过程容易发生冲刷破坏问题,通过冲刷试验研究了不同粉煤灰掺量对水泥粉煤灰稳定碎石混合料抗冲刷性能的影响规律,分析粉煤灰对水泥稳定碎石抗冲刷性能的改善。结果表明:掺加一定量的粉煤灰可以明显改善水泥稳定碎石混合料的抗冲刷性能,最佳掺量为10%;在最佳掺量时,水泥水化形成的Ca(OH)2与掺加的粉煤灰可以充分反应,生成的大量凝胶可以使结构整体变得更加致密,增强水泥稳定碎石颗粒与颗粒之间的粘聚力,使水泥稳定碎石整体强度增大,进而提高混合料的抗冲刷能力。In view of the erosion damage of cement stabilized aggregate to highway base course, the influence of different fly ash content on the erosion performance of cement stabilized aggregate are studied by erosion testing. The results show that mixing with a certain amount of fly ash can significantly improve the anti-erosion performance of cement stabilized aggregate, and the optimum mix amount is about 10%. For the optimum mix amount, Ca（OH） 2 of cement hydration formation can react well with fly ash to produce a large number of gelatin. The gelatin can make the overall structure denser and the cohesive force can be enhanced. Therefore, the cement stabilized aggregate mixing with fly-ash would have a good integer and the anti-erosion performance can be improved.

关 键 词：道路工程 水泥稳定碎石 粉煤灰 抗冲刷性能 

分 类 号：U416.212[交通运输工程—道路与铁道工程] TU502.6[建筑科学—建筑技术科学]