混杂纤维混凝土力学性能的正交试验研究
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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.
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.
引文
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[14] 权长青.混杂纤维高强混凝土层裂性能研究[D].广州:广州大学,2016.QUAN Changqing.Study on the spalling performance of hybrid fiber reinforced high strength concrete[D].Guangzhou:Guangzhou University,2016.(in Chinese)
[15] 陕亮,张亮.混杂钢-聚丙烯纤维混凝土的试验研究与强度计算[J].长江科学院院报,2015,32(12):114-119.SHAN Liang,ZHANG Liang.Experimental research and strength calculation of hybrid steel-polypropylene fiber reinforced concrete[J].Journal of Yangtze River Scientific Research Institute,2015,32(12):114-119.(in Chinese)
[16] 徐礼华,夏冬桃,夏广政,等.钢纤维和聚丙烯纤维对高强混凝土强度的影响[J].武汉理工大学学报,2007,29(4):58-60,98.XU Lihua,XIA Dongtao,XIA Guangzheng,et al.Effect of steel fiber and polypropylene fiber on the strength of high strength concrete[J].Journal of Wuhan University of Technology,2007,29(4):58-60,98.(in Chinese)
[17] 刘胜兵,徐礼华.混杂纤维高性能混凝土强度的计算方法探讨[J].武汉理工大学学报,2012,34(11):109-113,118.LIU Shengbing,XU Lihua.Calculation method of strength of hybrid fiber reinforced high performance concrete[J].Journal of Wuhan University of Technology,2012,34(11):109-113,118.(in Chinese)
[2] MOHAMMED A Y,NORAZMAN M N,MUHAMADF M Z,et al.Mechanical properties of hybrid steel fibre reinforced concrete with different aspect ratio[J].Australian Journal of Basic and Applied Sciences,2011,5(7):159-166.
[3] XU G D,HANNANT D J.Synergistic interaction between fibrillated polypropylene networks and glass fibers in a cement-based composite[J].Cement and Concrete Composites,1991,13(2):95-106.
[4] 赵国藩,黄承逵.纤维混凝土的研究与应用[M].大连:大连理工大学出版社,1992:1-8.ZHAO Guofan,HUANG Chengkui.Research and application of fiber reinforced concrete[M].Dalian:Dalian University of Technology Press,1992:1-8.(in Chinese)
[5] SAMAAN M,MIRMIRAN A.Model of concrete confined by fiber composites[J].Journal of Structural Engineering,1998,124(9):1025-1031.
[6] MéSZ?LY T,RANDLN.Shear behavior of fiber-reinforced ultra-high performance concrete beams[J].Engineering Structures,2018,168:119-127.
[7] 韩嵘,赵顺波,曲福来.钢纤维混凝土抗拉性能试验研究[J].土木工程学报,2006(11):63-67.HAN Rong,ZHAO Shunbo,QU Fulai.Experimental study on the tensile performance of steel fiber reinforced concrete[J].China Civil Engineering Journal,2006(11):63-67.(in Chinese)
[8] ALTUN F,TANRI?VEN F,DIRIKGIL T.Experimental investigation of mechanical properties of hybrid fiber reinforced concrete samples and prediction of energy absorption capacity of beams by fuzzy-genetic model[J].Construction and Building Materials,2013,44:565-574.
[9] PAPACHRISTOFOROU M,PAPAYIANNI I.Radiation shielding and mechanical properties of steel fiber reinforced concrete(SFRC) produced with EAF slag aggregates[J].Development Growth and Differentiation,2018,20(4):317-327.
[10] 杨成蛟,黄承逵,车轶,等.混杂纤维混凝土的力学性能及抗渗性能[J].建筑材料学报,2008,11(1):89-93.YANG Chengjiao,HUANG Chengkui,CHE Yi,et al.Mechanical properties and impermeability of hybrid fiber reinforced concrete[J].Journal of Building Materials,2008,11(1):89-93.(in Chinese)
[11] 孙伟,钱红萍,陈惠苏.纤维混杂及其与膨胀剂复合对水泥基材料的物理性能的影响[J].硅酸盐学报,2000,28(2):95-99.SUN Wei,QIAN Hongping,CHEN Huisu.The effect of the combination of hybrid fibers and expansive agent on thephysical properties of cementitious composites[J].Journal of the Chinese Ceramic Society,2000,28(2):95-99.(in Chinese)
[12] MITSUI K,KOJIMA M,YONEZAWA T,et al.Development of 150-200N/mm2 high strength concrete with hybrid fiber and application to a building strucrture[J].J-STAGE Journals,2010,16(32):21-26.
[13] EETHAR T D,RAMLI M.High strength characteristics of cement mortar reinforced with hybrid fibres[J].Construction and Building Materials,2011,25(5):2240-2247.
[14] 权长青.混杂纤维高强混凝土层裂性能研究[D].广州:广州大学,2016.QUAN Changqing.Study on the spalling performance of hybrid fiber reinforced high strength concrete[D].Guangzhou:Guangzhou University,2016.(in Chinese)
[15] 陕亮,张亮.混杂钢-聚丙烯纤维混凝土的试验研究与强度计算[J].长江科学院院报,2015,32(12):114-119.SHAN Liang,ZHANG Liang.Experimental research and strength calculation of hybrid steel-polypropylene fiber reinforced concrete[J].Journal of Yangtze River Scientific Research Institute,2015,32(12):114-119.(in Chinese)
[16] 徐礼华,夏冬桃,夏广政,等.钢纤维和聚丙烯纤维对高强混凝土强度的影响[J].武汉理工大学学报,2007,29(4):58-60,98.XU Lihua,XIA Dongtao,XIA Guangzheng,et al.Effect of steel fiber and polypropylene fiber on the strength of high strength concrete[J].Journal of Wuhan University of Technology,2007,29(4):58-60,98.(in Chinese)
[17] 刘胜兵,徐礼华.混杂纤维高性能混凝土强度的计算方法探讨[J].武汉理工大学学报,2012,34(11):109-113,118.LIU Shengbing,XU Lihua.Calculation method of strength of hybrid fiber reinforced high performance concrete[J].Journal of Wuhan University of Technology,2012,34(11):109-113,118.(in Chinese)