玄武岩纤维和钢纤维活性粉末混凝土性能试验研究  

Experimental study on properties of basalt fiber and steel fiber reactive powder concrete

作　　者：于新民 王德弘[2] 马一丹 刘晏廷 鞠彦忠[2] YU Xinmin;WANG Dehong;MA Yidan;LIU Yanting;JU Yanzhong(State GRID Fujian Economic Research Institute,Fuzhou 350000,China;School of Civil Engineering and Architecture,Northeast Electric Power University,Jilin 132012,China)

机构地区：[1]国网福建省电力有限公司经济技术研究院,福建福州350000 [2]东北电力大学建筑工程学院,吉林吉林132012

出　　处：《混凝土》2023年第11期100-104,共5页Concrete

基　　金：吉林省发改委资助项目(2021C038-5)。

摘　　要：考虑水胶比、纤维种类(玄武岩纤维、钢纤维)及纤维体积掺量设计了18组活性粉末混凝土,通过试验测试了18组活性粉末混凝土的工作性能以及不同龄期的抗压强度,分析了水胶比、纤维种类及纤维体积掺量对活性粉末混凝土工作性能及抗压强度的影响。结果表明:水胶比的变化对不同组RPC性能影响相似,水胶比每增加0.02,新拌混凝土的扩展度平均提高约40~50 mm。且强度总体呈现减小的趋势,强度下降率也趋于增大;大掺量玄武岩纤维RPC内易出现结团效应,对RPC工作性能影响巨大。结合文献对比分析在不同配合比下纤维体积掺量对RPC的增强效果,提出玄武岩纤维建议体积掺量在0.1%~0.5%,钢纤维体积掺量在0.75%~2.00%。Considering the water binder ratio,fiber type(basalt fiber,steel fiber)and fiber volume content,18 groups of reactive powder concrete were designed.The workability and compressive strength at different ages of 18 groups of RPC were tested,and the effects of water binder ratio,fiber type and fiber volume content on the workability and compressive strength of reactive powder concrete are analyzed.The results show that the change of water binder ratio has similar influence on the RPC performance of different fiber volume content.With the increase of water binder ratio of 0.02,the average expansion of fresh concrete increases by about from 40 mm to 50 mm.And the strength generally shows a decreasing trend,and the strength decline rate also tends to increase.Agglomeration effect is easy to appear in RPC with large amount of basalt fiber,which has a great impact on the working performance of RPC.Combined with the literature,the reinforcement effect of fiber volume content on RPC under different mix proportions is compared and analyzed.It is proposed that the volume content of basalt fiber is between 0.1%and 0.5%and that of steel fiber is between 0.75%and 2.00%.

关 键 词：活性粉末混凝土 玄武岩纤维 钢纤维 水胶比 工作性能 抗压强度 

分 类 号：TU528.041[建筑科学—建筑技术科学]