粉煤灰掺量对长龄期混凝土后期强度的影响  

Influence of Fly Ash Content on Later Strength of Long Age Concrete

作　　者：郭博[1] 赵亮 GUO Bo;ZHAO Liang(Shaanxi Railway Institute,Weinan 714000,China;CCCC-SHEC Railway Engineering Co.,Ltd.,Xianyang 713806,China)

机构地区：[1]陕西铁路工程职业技术学院,渭南市714000 [2]中交二公局铁路工程有限公司,咸阳市713806

出　　处：《北方交通》2019年第6期56-58,共3页Northern Communications

基　　金：陕西省教育厅专项科研计划项目(18JK0179)

摘　　要：在不同养护龄期(28d、60d、180d、365d)下,进行粉煤灰混凝土抗压强度试验,以28d龄期抗压强度为基准,研究粉煤灰掺量对混凝土后期强度值及其强度增长率的影响。结果表明,对于长龄期混凝土,当粉煤灰掺量为20%~30%时,其抗压强度达到最大值,当粉煤灰掺量为30%左右时,混凝土后期强度增长率达到最大。The test on the compressive strength of fly ash concrete is made under different maintenance period (28d, 60d, 180d, 365d). Based on the compressive strength of 28d maintenance period, the influence of fly ash content on the later strength value and strength growth rate of concrete is studied. The results show that, for long age concrete, when the fly ash content is 20%~30%, the compressive strength reaches the maximum value, and when the fly ash content is about 30%, the later strength growth rate of concrete reaches the maximum.

关 键 词：粉煤灰 长龄期混凝土 后期强度 强度增长率 

分 类 号：U414.03[交通运输工程—道路与铁道工程]