| 1,649 | 56 | 49 |
| 下载次数 | 被引频次 | 阅读次数 |
为了提高钢纤维的使用效率以及实现超高性能混凝土(UHPC)的性能调控,开展了钢纤维掺量及其形成的3D空间网络结构对UHPC的性能影响研究。采用改良的Andreasen和Andersen(MAA)颗粒堆积模型设计了UHPC基础配合比,提出了优化纤维取向的浇筑方式,之剖析了钢纤维3D空间网络结构的形成,并研究了钢纤维掺量及其3D空间结构对UHPC性能的影响。结果表明:采用单侧浇筑方式可优化UHPC钢纤维空间取向与分布;钢纤维掺量越高,纤维取向更加无序化且搭接概率越大,这导致了UHPC堆积结构的破坏和工作性能的下降;钢纤维的掺入可显著提高UHPC的力学性能,但掺量过高时,愈加紊乱的网络结构会导致增强效率的下降。钢纤维对UHPC的性能影响具有双面性,合理地优化与调控UHPC钢纤维掺量及其形成的3D空间网络结构,可有效提高钢纤维使用效率以及实现UHPC性能的提升。
Abstract：To improve the application efficiency of steel fibres and the properties of ultra-high performance concrete(UHPC)composites, the formation and optimization of fibres content and its 3D network in UHPC matrix were investigated. A basic UHPC mixture was designed using a modified Andreasen & Andersen(MAA) particle packing model. The formation of fibres network and the effect of steel fibres on the UHPC properties were analyzed. The experimental results reveal that casting at one side of the mould benefits the orientation of steel fibres, and a higher steel fibres content results in more disordered orientation of steel fibres and increases the possibility of fibres connection, which is not conductive to the development of particle packing structure and workability of UHPC. The addition of steel fibres contributes to the development of UHPC mechanical properties, but the excessive addition of steel fibres will cause the reduction of the fibre application efficiency. The use of steel fibres has both positive and negative effects on the UHPC properties, thus there is a need for the optimization of steel fibre 3D network to improve the fibre application efficiency and obtain expected UHPC products.
[1]陈宝春,韦建刚,苏家战,等.超高性能混凝土应用进展[J].建筑科学与工程学报, 2019, 36(2):10–20.CHEN Baochun, WEI Jiangang, SU Jiazhan, et al. J Archit Civ Eng(in Chinese), 2019, 36(2):10–20.
[2]黄政宇,阳东翱.超高性能混凝土基体的组成与微结构关系研究[J].硅酸盐通报, 2017, 36(12):4104–4111.HUANG Zhengyu, YANG Dongao. Bull Chin Ceram Soc(in Chinese),2017, 36(12):4104–4111.
[3] KHAYAT K H, MENG W, VALLURUPALLI K, et al. Rheological properties of ultra-high-performance concrete—An overview[J]. Cem Concr Res, 2019, 124:105828.
[4]韩方玉,刘建忠,刘加平,等.超高性能混凝土钢桥面铺装层收缩约束应力分析[J].硅酸盐学报, 2020, 48(11):1700–1705.HAN Fangyu, LIU Jianzhong, LIU Jiaping, et al. J Chin Ceram Soc,2020, 48(11):1700–1705.
[5]朱平,池颜海,易笃韬,等.混杂钢纤维对钢纤维–超高性能混凝土界面黏结性能的影响[J].硅酸盐学报, 2020, 48(10):1669–1681.ZHU Ping, CHI Yanhai, YI Dutao, et al. J Chin Ceram Soc, 2020,48(10):1669–1681.
[6]苏捷,史才军,秦红杰,等.超高性能混凝土抗折强度尺寸效应[J].硅酸盐学报, 2020, 48(11):1740–1746.SU Jie, SHI Caijun, QIN Hongjie, et al. J Chin Ceram Soc, 2020,48(11):1740–1746.
[7]冯滔滔,蒋金洋,刘志勇,等.机制砂超高性能混凝土的冲击压缩力学性能[J].硅酸盐学报, 2020, 48(8):1177–1187.FENG Taotao, JIANG Jinyang, LIU Zhiyong, et al. J Chin Ceram Soc,2020, 48(8):1177–1187.
[8] SHI C, WU Z, XIAO J, et al. A review on ultra high performance concrete:Part I. Raw materials and mixture design[J]. Constr Build Mater, 2015, 101:741–751.
[9]余睿,范定强,水中和,等.基于颗粒最紧密堆积理论的超高性能混凝土配合比设计[J].硅酸盐学报, 2020, 48(8):1145–1154.YU Rui, FAN Dingqiang, SHUI Zhonghe, et al. J Chin Ceram Soc,2020, 48(8):1145–1154.
[10] DE LARRARD F, SEDRAN T. Optimization of ultra-highperformance concrete by the use of a packing model[J]. Cem Concr Res, 1994, 24(6):997–1009.
[11] FAN Dingqiang, YU Rui, SHUI Zhonghe, et al. A novel approach for developing a green Ultra-High Performance Concrete(UHPC)with advanced particles packing meso-structure[J]. Constr Build Mater,2020, 265:120339.
[12]赵筠,路新瀛.构建科学智能混凝土配制新技术体系的设想和建议(三)[J].混凝土世界, 2019(12):42–51.ZHAO Jun, LU Xinying. Build Decor Mater World(in Chinese),2019(12):42–51.
[13] BROUWERS H J H, RADIX H J. Self-compacting concrete:theoretical and experimental study[J]. Cem Concr Res, 2005, 35(11):2116–2136.
[14] SNEHAL K, DAS B B. Application of Andreassen and Modified Andreassen Model on Cementitious Mixture Design:A Review[M].Cement Concrete Comp:Recent Develop Sustain Infrastr, 2021:729–750.
[15] YU R, SPIESZ P, BROUWERS H J H. Mix design and properties assessment of ultra-high performance fibre reinforced concrete(UHPFRC)[J]. Cem Concr Res, 2014, 56:29–39.
[16]余睿.解密UHPC材料的优化设计方法及未来发展方向[J].混凝土世界, 2020(8):30–37.YU Rui. Build Decor Mater World(in Chinese), 2020(8):30–37.
[17] FAN D Q, YU R, SHUI Z H, et al. A new design approach of steel fibre reinforced ultra-high performance concrete composites:Experiments and modeling[J]. Cem Concr Compos, 2020, 110:103597.
[18] BOULEKBACHE B, HAMRAT M, CHEMROUK M, et al. Flexural behavior of steel fibre-reinforced concrete under cyclic loading[J].Constr Build Mater, 2016, 126:253–262.
[19] MARTINE L, ROUSSEL N. Simple tools for fibre orientation prediction in industrial practice[J]. Cem Concr Res, 2011, 41:993–1000.
[20] EIK M, PUTTONEN, HERRMANN H. An orthotropic material model for steel fibre reinforced concrete based on the orientation distribution of fibres[J]. Compos Struct, 2015, 121:324–336.
[21] HUANG H, GAO X, LI L, et al. Improvement effect of steel fiber orientation control on mechanical performance of UHPC[J]. Constr Build Mater, 2018, 188:709–721.
[22] HUANG H, SU A, GAO X, et al. Influence of formwork wall effect on fiber orientation of UHPC with two casting methods[J]. Constr Build Mater, 2019, 215:310–320.
[23] HUANG H, GAO X, ZHANG A. Numerical simulation and visualization of motion and orientation of steel fibers in UHPC under controlling flow condition[J]. Constr Build Mater, 2019, 199:624–636.
[24] HUANG H, GAO X, LI Y, et al. SPH simulation and experimental investigation of fiber orientation in UHPC beams with different placements[J]. Constr Build Mater, 2020, 233:117372.
[25]安明喆,宋子辉,李宇,等.不同钢纤维含量RPC材料受压力学性能研究[J].中国铁道科学, 2009, 30(5):34–38.AN Mingzhe, SONG Zihui, LI Yu, et al. China Rail Sci(in Chinese),2009, 30(5):34–38.
[26] ZHENG W, LI H, WANG Y. Compressive stress-strain relationship of steel fiber-reinforced reactive powder concrete after exposure to elevated temperature[J]. Constr Build Mater, 2012, 35(10):931–940.
[27] DE LARRARD F. Concrete Mixture Proportioning:A Scientific Approach[M]. CRC Press, 1999.
[28] WU Z, SHI C, HE W, et al. Effects of steel fiber content and shape on mechanical properties of ultra high performance concrete[J]. Constr Build Mater, 2016, 103:8–14.
[29] MENG W, KHAYAT K H. Effect of hybrid fibers on fresh properties,mechanical properties, and autogenous shrinkage of cost-effective UHPC[J]. J Mater Civ Eng, 2018, 30(4):04018030.
[30] LI L G, ZHUO H X, ZHU J, et al. Packing density of mortar containing polypropylene, carbon or basalt fibres under dry and wet conditions[J]. Powder Technol, 2019, 342:433–440.
[31] WONG H H C, KWAN A K H. Packing density of cementitious materials:part 1—measurement using a wet packing method[J]. Mater Struct, 2008, 41(4):689–701.
[32] GB/T 2419–2005.水泥胶砂流动度测定方法[S].GB/T 2419–2005. Test method for fluidity of cement mortar[S].
[33] GB/T 17671–2020.水泥胶砂强度检验方法[S].GB/T 17671–2020. Method of testing cements-Determination of strength[S].
[34] WANG R, GAO X J., ZHANG J Y, et al. Spatial distribution of steel fibers and air bubbles in UHPC cylinder determined by X-ray CT method[J], Constr Build Mater, 2018, 160:39–47.
[35] WONG V, KWAN A K H. A 3-parameter model for packing density prediction of ternary mixes of spherical particles[J]. Powder Technol,2014, 268:357–367.
[36] CHU S H, JIANG Y, KWAN A K H. Effect of rigid fibres on aggregate packing[J]. Constr Build Mater, 2019, 224:326–335.
[37] RAMEZANIANPOUR A A, ESMAEILI M, GHAHARI S A, et al.Laboratory study on the effect of polypropylene fiber on durability,and physical and mechanical characteristic of concrete for application in sleepers[J]. Constr Build Mater, 2013, 44:411–418.
[38] BOULEKBACHE B, HAMRAT M,CHEMROUK M, et al.Flowability of fibre reinforced concrete and its effect on the mechanical properties of the material[J], Constr Build Mater, 2010, 24(9):1664–1671.
[39] YOO D Y, KANG S T, LEE J H, et al. Effect of shrinkage reducing admixture on tensile and flexural behaviors of UHPFRC considering fiber distribution characteristics[J]. Cem Concr Res, 2013, 54:180–190.
基本信息:
DOI：10.14062/j.issn.0454-5648.20210310
中图分类号:TU528.572
引用信息:
[1]余睿,范定强,孙美娟,等.钢纤维掺量及其3D空间结构对超高性能混凝土性能的影响[J].硅酸盐学报,2021,49(11):2313-2321.DOI:10.14062/j.issn.0454-5648.20210310.
基金信息:
国家自然科学基金项目(U2006224,52008220)
2021-10-11
2021-10-11
2021-10-11