二灰碎石基层集料配合比设计及改性研究  

Design of Mixed Ratio and Study on Modification for Macadam with Lime-Fly Ash

作　　者：詹启伟[1] 阎长虹[1] 黄志静 陈明珠[1] 王玉英[1] 郑军[1] 郭军辉[1] 王吉刚[1] 

机构地区：[1]南京大学地球科学系,南京210093 [2]东盟营造工程有限公司,西安710075

出　　处：《防灾减灾工程学报》2008年第4期462-467,共6页Journal of Disaster Prevention and Mitigation Engineering

基　　金：教育部博士点基金项目(20070284006)资助

摘　　要：本文通过室内试验,首先分析了不同配比、龄期对二灰碎石无侧限抗压强度及水稳性的影响,确定二灰碎石中石灰、粉煤灰与碎石的质量比为6:12:82是最佳配比方案;其次,在确定最佳配比方案的基础上,采用新型固化剂对二灰碎石进行改性试验,结果表明新型固化剂可以大大提高二灰碎石的强度和水稳性;最后,研究改性后二灰碎石养护90天、180天的强度和水稳性,确定试样固化养护期限为90天,为固化剂的推广应用提供了参考依据。The effects of different mixed ratios and different times on compressive strength and water-stability of macadam with lime-fly ash were analyzed in laboratory,which have showed that the best ratio of mixing lime,fly ash and detritus is 6：12：82.In addition,a kind of solidifying admixture was added into macadam with lime-fly ash to modify the material,and the result has showed that it can further increase the compressive strength and improve the water-stability.Finally,we tested the compressive strength and the water-stability of consolidated macadam with lime-fly ash in 90 and 180 days age respectively,and concluded that the chemical reaction can be finished in 90 days,which provides a basis for wide application of the new solidifying admixture.

关 键 词：二灰碎石 配合比 无侧限抗压强度 新型固化剂 

分 类 号：U414[交通运输工程—道路与铁道工程]