考虑材料组分影响因素的HP-FRCC流动性能及力学性能  

Flow Properties and Mechanical Properties of HP-FRCC Considering Influence Factors of Material Composition

作　　者：翁志英[1] 胡海楠 耿丽[3] 曹悫 吴应雄[2] WENG Zhiying;HU Hainan;GENG Li;CAO Que;WU Yingxiong(Fuzhou Polytechnic,Fuzhou,Fujian 350108,China;College of Civil Engineering,Fuzhou University,Fuzhou,Fujian,350108,China;Fujian Building Science Research Institute Co.,Ltd.,Fuzhou,Fujian 350100,China;College of Civil Engineering,Xiamen University Tan Kah Kee College,Zhangzhou,Fujian 363105,China)

机构地区：[1]福州职业技术学院,福建福州350108 [2]福州大学土木工程学院,福建福州350108 [3]福建省建筑科学研究院责任有限公司,福建福州350100 [4]厦门大学嘉庚学院土木工程学院,福建漳州363105

出　　处：《水利与建筑工程学报》2024年第5期125-133,共9页Journal of Water Resources and Architectural Engineering

基　　金：福州职业技术学院课题(LX-2024-HX-004);福建省建设科技研究开发项目(2023-B-8,2023-k-45,2023-k-47)。

摘　　要：为制备适用于砖墙体面层加固的水泥基复合材料,降低其成本同时保证其力学性能,采用一种高性能纤维增强水泥基复合材料(HP-FRCC)用于砖墙体面加固,进而对HP-FRCC的流动度和力学强度进行研究分析,采用跳桌测试法及抗压抗拉测试,分析不同水胶比、减水剂、石灰石粉、聚甲醛POM纤维掺量制备的HP-FRCC的流动性能和力学性能。结果表明:增大水胶比以及石灰石粉掺量能够改善流动性能,而纤维掺量的增大会导致流动度的降低。当POM纤维掺量为2.5%,石灰石粉掺量为35%~40%时,HP-FRCC力学性能最优,而随着水胶比的提高,力学性能下降,拉伸延性呈现先增后降的趋势。POM纤维与HP-FRCC基体之间存在较强的粘结力,纤维的存在促进抗拉强度以及延性的提高。减水剂掺量为2.0%时强度、拉伸延性最小但流动性能最佳。In order to develop cement-based composites suitable for reinforcing brick wall surface,while reducing costs and ensuring mechanical performance,a High Performance-Fiber Reinforced Cementitious Composite(HP-FRCC)has been innovatively proposed,drawing from UHPC and ECC materials and components.The flow and mechanical properties of HP-FRCC prepared with varying water-to-binder ratios,water reducers,limestone powder,and polyoxymethylene(POM)fiber content are investigated by the step-down,compressive,and tensile tests.The results indicate that increasing the water-to-binder ratio and limestone powder content enhances fluidity,whereas higher fiber content reduces fluidity.Optimal mechanical properties of HP-FRCC were achieved with a POM fiber content of 2.5%and a limestone powder content of 35%~40%.The strong bond between POM fibers and the HP-FRCC matrix improves both tensile strength and ductility.Increasing the water-to-binder ratio results in a decline in mechanical properties,with tensile ductility initially increasing before decreasing.When the water reducer content is 2.0%,the composite exhibits the best flow performance,although its strength and tensile ductility are at their lowest.

关 键 词：纤维增强水泥基复合材料 配合比 流动性能 力学性能 

分 类 号：TU528[建筑科学—建筑技术科学]