不同外掺纤维对活性粉末混凝土抗压性能影响  

Influence of compressive strength of reactive powder concrete with different fibers

作　　者：郭继祥 

机构地区：[1]中铁十二局集团第四工程有限公司,陕西西安710021

出　　处：《混凝土》2016年第5期87-90,共4页Concrete

基　　金：国家自然科学基金(50778118)

摘　　要：为探究不同纤维种类对活性粉末混凝土抗压力学性能的影响,基于试验对不同养护方式下掺加钢纤维（掺量0、1%、2%、3%）、聚丙烯纤维（0、0.1%、0.2%、0.3%）、碳纤维（0、0.5%、1%、1.5%）的RPC抗压力学性能展开研究,养护方式包括标准养护、热水养护、蒸汽养护三种。结果表明,钢纤维及碳纤维的掺入有利于提高RPC抗压强度,对RPC的脆性破坏也有所改善,聚丙烯纤维掺量对RPC抗压强度影响较小。随着不同纤维掺量的增加,RPC流动性及和易性均不断降低,综合RPC力学及施工性能因素,建议实际工程中RPC钢纤维掺量取为1%~3%、碳纤维掺量取为0.5%~1%。To explore the effects of different fiber of compressive mechanical properties of reactive powder concrete （ RPC）, experimen- tal study of compressive mechanical properties of RPC with steel fibers （ doped amount of 0,1%,2% and 3% ）, polypropylene fiber （ 0, 0.1% ,0.2%, and 0.3% ）, and carbon fiber（ 0,0.5%, 1%, 1.5% ） were conducted. The curing methods including standard curing, hot water curing and steam curing.The results showed that the incorporation of steel fiber and carbon fiber can improve the compressive strength and brittleness of RPC, and the content of polypropylene fiber show small impact on compressive strength of RPC. With increases of dif- ferent fiber volume fraction,liquidity of RPC decreased.In comprehensive of mechanical and construction performance factors of RPC, it is recommended that the admixture of 1%-3% steel fiber and 0.5%-1% carbon fiber can win best in practical engineering.

关 键 词：钢纤维 聚丙烯纤维 碳纤维 抗压强度 活性粉末混凝土 

分 类 号：TU528.041[建筑科学—建筑技术科学]