碱激发粉煤灰水泥稳定再生集料性能的研究  

The Study on Properties of Alkali-activated Fly Ash Cement Stabilized Recycled Aggregate

作　　者：李曙龙 吴晚良 万暑 黄倩 颜佳林 LI Shulong;WU Wanliang;WAN Shu;HUANG Qian;YAN Jialin(Hunan Changyi Expressway Expansion Project Construction Development Co.,Ltd.,Changsha,Hunan 410003,China;Hunan Zhongda Testing Technology Group Co.,Ltd.,Changsha,Hunan 410000,China;Hunan Province Research and Construction Center for Building Solid Waste Utilization Technology,Changsha,Hunan 410007,China;Hunan Yunzhong Recycling Technology Co.,Ltd.,Changsha,Hunan 410007,China;North China Company of CCCC Tunnel Engineering Bureau Co.,Ltd.,Beijing 100103,China)

机构地区：[1]湖南省长益高速公路扩容工程建设开发有限公司,湖南长沙410003 [2]湖南中大检测技术集团有限公司,湖南长沙410000 [3]湖南省建筑固废资源化利用工程技术研究中心,湖南长沙410007 [4]湖南云中再生科技股份有限公司,湖南长沙410007 [5]中交隧道工程局有限公司华北分公司,北京100103

出　　处：《公路工程》2020年第5期197-202,233,共7页Highway Engineering

基　　金：湖南省交通运输厅(201806,201307);长沙市重大专项(kq1804053)。

摘　　要：主要研究在不同粉煤灰掺量条件下,碱激发粉煤灰水泥稳定再生集料的路用性能。首先测试了碱激发粉煤灰水泥的凝结时间与强度,然后进行混合料力学性能与耐久性测试。研究得出:适量粉煤灰掺量的碱激发粉煤灰水泥表现出较好的路用水泥特性;粉煤灰掺量25%的试件力学性能与抗冲刷性能最佳,碱激发粉煤灰水泥稳定再生集料的后期强度增加速度大于纯水泥稳定再生集料,且随着粉煤灰掺量增加,混合料试件干缩应变逐渐变小。This paper mainly studies the road performance of alkali-activated fly ash cement stabilized recycled aggregate under different fly ash content.The setting time and strength of the alkali-activated fly ash cement were first tested,and then the mechanical properties and durability tests of the mixture were tested.The results show that the alkali-activated fly ash cement shows better road cement characteristics when at the proper fly ash content;the mechanical properties and erosion resistance of the specimen with 25%fly ash content are the best,and The late strength increase rate of the alkali-activated fly ash cement stabilized recycled aggregate is greater than pure cement stabilized recycled aggregate,and as the fly ash content increases,the dry shrinkage of the mixture becomes smaller.

关 键 词：碱激发粉煤灰水泥 再生集料 路用性能 干缩 

分 类 号：U416.26[交通运输工程—道路与铁道工程]