四元复掺制备绿色高性能混凝土试验研究  

Experimental Study on Preparation of Green High-Performance Concrete by Quaternary Admixture

作　　者：耿靖玮 GENG Jingwei(Tiezheng Test Inspection Technology Co.Ltd.,Jinan Shandong 250200,China)

机构地区：[1]铁正检测科技有限公司,山东济南250200

出　　处：《铁道建筑技术》2024年第3期5-8,16,共5页Railway Construction Technology

基　　金：中铁十四局集团有限公司科研课题(913700001630559891202125)。

摘　　要：以制备的活性粉末自密实混凝土(RPC-SCC)为基准,进行配比优化。使用河砂代替石英砂,根据紧密堆积理论,试配出达到最大密实状态的河砂掺配比例为细砂(0.15~0.3)mm∶中砂(0.3~0.6)mm∶粗砂(0.6~1.18)mm=0.18∶0.42∶0.4;绝对体积法进行配比设计,利用石灰石粉等体积取代基准配比中的石英石粉,偏高岭土等体积取代硅灰;粉煤灰、矿粉内掺取代部分水泥;使用普通混凝土养护工艺(温度(20±1)℃,相对湿度>95%),制得水泥占胶材40.88%,坍落扩展度660 mm、28 d标养强度106.9 MPa绿色高性能混凝土。The mix optimization was based on Reactive Powder Self-compacting Concrete(RPC-SCC).Using river sand instead of quartz sand:by using dense packing theory,the mixing ratio of river sand to reach the maximum dense state was tried out as(0.15-0.3)mm:(0.3-0.6)mm:(0.6-1.18)mm=0.18:0.42:0.4.The absolute volume method was used to design the mixture ratio,in which the limestone powder was used to replace the quartz powder in the benchmark ratio,and the metakaolin was used to replace the silica fume,fly ash and mineral powder were mixed to replace part of cement.Using the ordinary concrete curing technology(temperature 20 C±1℃,relative humidity>95%),the green high-performance concrete with cement content of 40.88%,slump expansion of 660 mm,28 d standard curing strength of 106.9 MPa was obtained.

关 键 词：紧密堆积理论 绝对体积法 河砂 偏高岭土 石灰石粉 

分 类 号：TU528[建筑科学—建筑技术科学]