混杂纤维混凝土力学性能的正交试验研究  

Orthogonal Experimental Study on Mechanical Properties of Hybrid Fiber Reinforced Concrete

作　　者：权长青 焦楚杰[1] 杨云英 李习波 张磊 QUAN Changqing;JIAO Chujie;YANG Yunying;LI Xibo;ZHANG Lei(School of Civil Engineering,Guangzhou University,Guangzhou 510006,China;Architecture and Civil Engineering Institute,Guangdong University of Petrochemical Technology,Maoming 525000,China;Preparation Office,Provincial Vocational and Technical Education Demonstration Base,Qingyuan 511500,China)

机构地区：[1]广州大学土木工程学院,广东广州510006 [2]广东石油化工学院建筑工程学院,广东茂名525000 [3]清远市省级职教示范基地筹建办公室,广东清远511500

出　　处：《建筑材料学报》2019年第3期363-370,共8页Journal of Building Materials

基　　金：国家自然科学基金资助项目(51778158,51478128,51278135,41502262);广东省水利科技创新重点项目(2017-32);住房和城乡建设部科研开发项目(07-K4-5,07-K4-13,2010-K3-27,2010-K4-18);广州大学重点产学研项目(2018-14);茂名市科技计划项目(2017306,2018033);广东石油化工学院自然科学研究项目(2017qn32,2017qn33)

摘　　要：为了研究钢纤维(SF)、聚丙烯纤维(PPF)和粉煤灰(FA)这3种因素对C40级混杂纤维混凝土(HFRC)力学性能的影响,对HFRC的抗压强度、劈裂抗拉强度和轴心抗压强度进行了极差分析以及方差分析.结果表明:纤维的掺入能显著提高混凝土的劈裂抗拉强度,钢纤维、聚丙烯纤维和粉煤灰对混凝土劈裂抗拉强度的最大提升幅度分别为31.5%,5.4%和3.5%;纤维对混凝土抗压强度的增强效应不如对劈裂抗拉强度的增强效应显著.最后就3种因素对HFRC力学性能的影响进行了机理分析,建立了HFRC抗压强度、劈裂抗拉强度和轴心抗压强度的预测模型.In view of the influence of steel fiber(SF),polypropylene fiber(PPF) and fly ash(FA) on the mechanical properties of C40 hybrid fiber reinforced concrete(HFRC),orthogonal experimental design was carried out. Through the analysis of the extreme difference and the variance of the cube compressive strength,splitting tensile strength and axial compressive strength,the influence degree and significant factors of the three factors were obtained. The results show that the splitting tensile strength of concrete can be significantly improved by adding fiber,and the maximum increasing degree of steel fiber,polypropylene fiber and fly ash is 31.5%,5.4% and 3.5% respectively. Also the experimental data indicate that the enhancement effect of fiber on the compressive strength is less significant than that of splitting tensile strength. Then,the mechanism analysis of the influence of the three factors on the mechanical properties of HFRC is implemented. Finally,the prediction models of cube compressive strength,splitting tensile strength and axial compressive strength of HFRC are established.

关 键 词：混杂纤维混凝土 力学性能 正交试验 机理分析 强度预测模型 

分 类 号：TU528.01[建筑科学—建筑技术科学]