纤维再生混凝土基本力学性能研究
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摘要
以强度等级、骨料取代率和混杂纤维为变量,研究纤维再生混凝土的各项力学性能,同时分析了破坏形态。试验结果表明,纤维再生混凝土试件的破坏形态与普通混凝土相似;强度等级对立方体抗压强度影响较大,但对劈裂抗拉强度和轴心抗压强度影响不大;再生骨料由于本身的缺陷对再生混凝土强度有降低的影响;因为纤维良好的抗拉强度和延性,所以加入混杂纤维可以明显提高再生混凝土强度,但当掺量过多时,纤维的分布不均匀,反而影响了其发挥有效的作用;通过非线性拟合得出其强度换算公式。
Taking strength grade, aggregate replacement rate and hybrid fiber as variables, the mechanical properties of fiber reinforced recycled concrete were studied and the failure mode was also analyzed. The test results show that: the failure modes of fiber recycled concrete specimens are similar to those of ordinary concrete; strength grade has a great influence on cubic compressive strength, but has little effect on splitting tensile strength and axial compressive strength.Because of the good tensile strength and ductility of fiber, the strength of recycled concrete can be significantly improved by adding hybrid fiber, but the amount of fiber is too much, the distribution of fiber is not uniform, which affects its effective role. In addievon, the strength conversion formula is obtained through nonlinear fitting.
Taking strength grade, aggregate replacement rate and hybrid fiber as variables, the mechanical properties of fiber reinforced recycled concrete were studied and the failure mode was also analyzed. The test results show that: the failure modes of fiber recycled concrete specimens are similar to those of ordinary concrete; strength grade has a great influence on cubic compressive strength, but has little effect on splitting tensile strength and axial compressive strength.Because of the good tensile strength and ductility of fiber, the strength of recycled concrete can be significantly improved by adding hybrid fiber, but the amount of fiber is too much, the distribution of fiber is not uniform, which affects its effective role. In addievon, the strength conversion formula is obtained through nonlinear fitting.
引文
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[16]柯开展.玄武岩纤维对混凝土力学性能的影响[J].福建建设科技,2016(5):42-43.
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[18]Semsi Yaz1c1,Inan G,Tabak V.Effect of aspect ratio and volume fraction of steel fiber on the mechanical properties of SFRC[J].Construction&Building Materials,2007,21(6):1250-1253.
[19]李胡勇,王丽.掺入塑钢纤维的轻骨料混凝土与钢筋间的力学性能研究[J].硅酸盐通报,2017,36(1):235-241.
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[23]Method of test for splitting tensile strength of concrete:JISA 1113-2006[S].Tokyo:Japan Concrete Institute,2006.
[24]American Concrete Institute.Building code requirements for structural concrete and commentary:ACI318-11[S].ACICommittee 318,2011.
[25]中华人民共和国住房和城乡建设部.GB 50010-2010混凝土结构设计规范[S].北京:中国建筑工业出版社,2015.
[2]孙跃东,肖建庄.再生混凝土骨料[J].混凝土,2004(6):33-36.
[3]Juan M S D,Gutiérrez P A.Study on the influence of attached mortar content on the properties of recycled concrete aggregate[J].Construction&Building Materials,2009,23(2):872-877.
[4]Tam V,Tam C M,Le K N.Removal of cement mortar remains from recycled aggregate using pre-soaking approaches[J].Resources Conservation&Recycling,2007,50(1):82-101.
[5]肖益民.合宁高速公路水泥混凝土路面再生利用的研究[A].中国公路学会.第四届国际道路和机场路面技术大会论文集[C].中国公路学会,2002.
[6]谢云飞,李智慧.再生混凝土工程应用及性能监测研究[J].混凝土与水泥制品,2015(8):20-23.
[7]周静海,何海进,孟宪宏,等.再生混凝土基本力学性能试验[J].沈阳建筑大学学报:自然科学版,2010,26(3):464-468.
[8]陈宗平,薛建阳,余兴国,等.再生混凝土轴心抗压强度试验研究[J].混凝土,2011,263(9):4-11.
[9]董健苗,徐翔波,王凯.不同强度等级再生混凝土抗折性能的研究[J].广西科技大学学报,2015(2):83-86.
[10]张学兵.再生混凝土改性及配合比设计研究[D].长沙:湖南大学,2015.
[11]古松,雷挺,陶俊林.再生混凝土配合比设计及早期强度试验研究[J].工业建筑,2012,42(4):1-4.
[12]沈蒲生.混凝土结构设计原理[M].北京:高等教育出版社,2012.
[13]杨永生,王军.纤维再生混凝土基本力学性能试验[J].辽宁工程技术大学学报,2013,32(12):1669-1672.
[14]Banthia N,Nandakumar N.Crack growth resistance of concrete reinforced with a low volume fraction of polymericm fiber[J].Journal of Materials Science Letters,2001,20(17):1651-1653.
[15]李晓路,金宝宏,姚宇峰,等.玄武岩纤维再生混凝土的基本力学性能[J].河北大学学报,2017,37(3):225-230.
[16]柯开展.玄武岩纤维对混凝土力学性能的影响[J].福建建设科技,2016(5):42-43.
[17]杨永生,王军.纤维再生混凝土基本力学性能试验[J].辽宁工程技术大学学报,2013,32(12):1669-1672.
[18]Semsi Yaz1c1,Inan G,Tabak V.Effect of aspect ratio and volume fraction of steel fiber on the mechanical properties of SFRC[J].Construction&Building Materials,2007,21(6):1250-1253.
[19]李胡勇,王丽.掺入塑钢纤维的轻骨料混凝土与钢筋间的力学性能研究[J].硅酸盐通报,2017,36(1):235-241.
[20]中华人民共和国建设部.JGJ 52-2006普通混凝土用砂、石质量及检验方法标准[S].北京:中国建筑工业出版社,2007.
[21]中华人民共和国住房和城乡建设部.JGJ 55-2011普通混凝土配合比设计规程[S].北京:中国建筑工业出版社,2011.
[22]中华人民共和国建设部,国家质量监督检验检疫总局.GB/T 50081-2002普通混凝土力学性能试验方法标准[S].北京:中国建筑工业出版社,2003.
[23]Method of test for splitting tensile strength of concrete:JISA 1113-2006[S].Tokyo:Japan Concrete Institute,2006.
[24]American Concrete Institute.Building code requirements for structural concrete and commentary:ACI318-11[S].ACICommittee 318,2011.
[25]中华人民共和国住房和城乡建设部.GB 50010-2010混凝土结构设计规范[S].北京:中国建筑工业出版社,2015.
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