Effect of Steel Microfiber on Mechanical Properties of High Elastic Modulus Concrete

Abstract

Abstract: A high elastic modulus concrete was designed on the base of modified Furnas model and close-packing aggregates test results. In addition, steel microfibers were used to improve the toughness of high elastic modulus concrete. The effect of steel microfiber on fluidity, strength, elastic modulus and bending toughness of concrete under close-packing aggregates state was investigated. The results show that using close-packing aggregates and proper steel microfiber, the static and dynamic elastic modulus of concrete are up to 50.15 GPa and 53.23 GPa, respectively, the fracture energy is about 5 680.45 N/m, and the residual bending toughness ratio increases from 0 to 0.43. Moreover, with the increase of steel microfiber content, the fluidity of high elastic modulus concrete decreases, while the flexural strength, elastic modulus and bending toughness increase. With the increase of steel microfiber content, the compressive strength increases first and then decreases. In close-packing aggregates state, considering fluidity, mechanical properties and engineering economy, the resonable amount of steel microfiber in high elastic modulus concrete is 0.4% (volume fraction).

Key words: high elastic modulus concrete, steel microfiber, Furnas model, packing density, elastic modulus, fracture toughness

CLC Number:

TU528

TANG Yanfeng, LI Gengying, WANG Linbin, ZHANG Min. Effect of Steel Microfiber on Mechanical Properties of High Elastic Modulus Concrete[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(12): 4225-4233.

References

[1] BAŽANT Z P, YU Q, LI G H. Excessive long-time deflections of prestressed box girders. I: record-span bridge in Palau and other paradigms[J]. Journal of Structural Engineering, 2012, 138(6): 676-686.
[2] BAŽANT Z P, YU Q, LI G H. Excessive long-time deflections of prestressed box girders. II: numerical analysis and lessons learned[J]. Journal of Structural Engineering, 2012, 138(6): 687-696.
[3] GUO Q, SUN Y B, MI T. Assessment on long-term deflection of concrete beam bridges based on uncertainty quantification method[J]. Structures, 2021, 34: 3013-3027.
[4] NEHDI M L. Only tall things cast shadows: opportunities, challenges and research needs of self-consolidating concrete in super-tall buildings[J]. Construction and Building Materials, 2013, 48: 80-90.
[5] JIN Q X, LI V C. Development of lightweight engineered cementitious composite for durability enhancement of tall concrete wind towers[J]. Cement and Concrete Composites, 2019, 96: 87-94.
[6] OUYANG X, SHI C J, WU Z M, et al. Experimental investigation and prediction of elastic modulus of ultra-high performance concrete (UHPC) based on its composition[J]. Cement and Concrete Research, 2020, 138: 106241.
[7] 欧阳雪,史才军,史金华,等.超高性能混凝土受压力学性能及其弹性模量预测[J].硅酸盐学报,2021,49(2):296-304.
OUYANG X, SHI C J, SHI J H, et al. Compressive mechanical properties and prediction for elastic modulus of ultra-high performance concrete[J]. Journal of the Chinese Ceramic Society, 2021, 49(2): 296-304 (in Chinese).
[8] BAZANT Z P, HUBLER M H. Theory of cyclic creep of concrete based on Paris law for fatigue growth of subcritical microcracks[J]. Journal of the Mechanics and Physics of Solids, 2014, 63: 187-200.
[9] KONSTA-GDOUTOS M S, DANOGLIDIS P A, SHAH S P. High modulus concrete: effects of low carbon nanotube and nanofiber additions[J]. Theoretical and Applied Fracture Mechanics, 2019, 103: 102295.
[10] 肖金军,何伟能,李纯,等.基于配束和材料优化的连续刚构桥下挠控制技术[J].桥梁建设,2021,51(6):31-38.
XIAO J J, HE W N, LI C, et al. Deflection control techniques based on prestressing tendons arrangement and material optimization for continuous rigid-frame bridge[J]. Bridge Construction, 2021, 51(6): 31-38 (in Chinese).
[11] 蒋正武,周磊,李文婷.石灰岩骨料混凝土弹性模量与强度相关性研究[J].建筑材料学报,2014,17(4):649-653.
JIANG Z W, ZHOU L, LI W T. Study on the correlation between elastic modulus and strength of concrete made with limestone aggregate[J]. Journal of Building Materials, 2014, 17(4): 649-653 (in Chinese).
[12] WANG Q H, LI Z, ZHANG Y Z, et al. Influence of coarse coal gangue aggregates on elastic modulus and drying shrinkage behaviour of concrete[J]. Journal of Building Engineering, 2020, 32: 101748.
[13] BEUSHAUSEN H, DITTMER T. The influence of aggregate type on the strength and elastic modulus of high strength concrete[J]. Construction and Building Materials, 2015, 74: 132-139.
[14] WANG X H, WANG K J, TAYLOR P, et al. Assessing particle packing based self-consolidating concrete mix design method[J]. Construction and Building Materials, 2014, 70: 439-452.
[15] CHENG Y H, ZHU B L, YANG S H, et al. Design of concrete mix proportion based on particle packing voidage and test research on compressive strength and elastic modulus of concrete[J]. Materials (Basel, Switzerland), 2021, 14(3): 623.
[16] SUN R W, FANOURAKIS G C. An assessment of factors affecting the elastic modulus of concrete[J]. Structural Concrete, 2022(23): 593-603.
[17] NG P L, KWAN A K H, LI L G. Packing and film thickness theories for the mix design of high-performance concrete[J]. Journal of Zhejiang University-Science A (Applied Physics ＆ Engineering), 2016, 17(10): 759-781.
[18] ZHU W, CHEN Y, LI F X, et al. Design and preparation of high elastic modulus self-compacting concrete for pre-stressed mass concrete structures[J]. Journal of Wuhan University of Technology-Mater Sci Ed, 2016, 31(3): 563-573.
[19] YOUSUF S, SANCHEZ L F M, SHAMMEH S A. The use of particle packing models (PPMs) to design structural low cement concrete as an alternative for construction industry[J]. Journal of Building Engineering, 2019, 25: 100815.
[20] KLEIN N S, LENZ L A, MAZER W. Influence of the granular skeleton packing density on the static elastic modulus of conventional concretes[J]. Construction and Building Materials, 2020, 242: 118086.
[21] LI V C, MAALEJ M. Toughening in cement based composites. Part I: Cement, mortar, and concrete[J]. Cement and Concrete Composites, 1996, 18(4): 223-237.
[22] 刘加平,汤金辉,韩方玉.现代混凝土增韧防裂原理及应用[J].土木工程学报,2021,54(10):47-54+63.
LIU J P, TANG J H, HAN F Y. Toughening and crack prevention of modern concrete: mechanisms and applications[J]. China Civil Engineering Journal, 2021, 54(10): 47-54+63 (in Chinese).
[23] SHAH A A, RIBAKOV Y. Recent trends in steel fibered high-strength concrete[J]. Materials & Design, 2011, 32(8/9): 4122-4151.
[24] 白敏,牛荻涛,姜磊,等.钢纤维改善混凝土力学性能和微观结构的研究[J].硅酸盐通报,2013,32(10):2084-2089.
BAI M, NIU D T, JIANG L, et al. Research on improving the mechanical properties and microstructure of concrete with steel fiber[J]. Bulletin of the Chinese Ceramic Society, 2013, 32(10): 2084-2089 (in Chinese).
[25] 张秀芝,毕梦迪,刘同军,等.钢纤维混凝土中纤维分布特性影响因素研究进展[J].硅酸盐学报,2021,49(8):1732-1742.
ZHANG X Z, BI M D, LIU T J, et al. Research progress in factors affecting fiber distribution in steel fiber concrete[J]. Journal of the Chinese Ceramic Society, 2021, 49(8): 1732-1742 (in Chinese).
[26] 中华人民共和国交通运输部.公路工程水泥及水泥混凝土试验规程:JTG 3420—2020[S].北京:人民交通出版社,2020.
Ministry of Transport of the People's Republic of China. Test procedure for cement and cement concrete of highway engineering: JTG 3420—2020[S]. Beijing: People's Communications Press, 2020 (in Chinese).
[27] 中国工程建设标准化协会.超声回弹综合法检测混凝土强度技术规程:CECS 02—2005[S].北京:中国计划出版社,2005.
China Engineering Construction Standardization Association. Technical specification for testing concrete strength by ultrasonic-rebound combined method: CECS 02—2005[S]. Beijing: China Planning Press, 2005 (in Chinese).
[28] FURNAS C C. Grading aggregates-I.-mathematical relations for beds of broken solids of maximum density[J]. Industrial & Engineering Chemistry, 1931, 23(9): 1052-1058.
[29] ZHENG J M, CARLSON W B, REED J S. The packing density of binary powder mixtures[J]. Journal of the European Ceramic Society, 1995, 15(5): 479-483.
[30] 李良,龙广成,谢友均,等.基于三维扫描与数值技术的粗集料形状特征与级配研究[J].铁道科学与工程学报,2022,19(3):714-721.
LI L, LONG G C, XIE Y J, et al. Research on the shape feature and gradation of coarse aggregate based on 3D scanning and numerical technology[J]. Journal of Railway Science and Engineering, 2022, 19(3): 714-721 (in Chinese).
[31] 肖柏林,杨志强,高谦,等.混合骨料堆积模型研究与新型模型建立[J].材料导报,2018,32(14):2400-2406.
XIAO B L, YANG Z Q, GAO Q, et al. Discussion on packing density models of combined aggregate and a new solution[J]. Materials Review, 2018, 32(14): 2400-2406 (in Chinese).
[32] LIU J Z, HAN F Y, CUI G, et al. Combined effect of coarse aggregate and fiber on tensile behavior of ultra-high performance concrete[J]. Construction and Building Materials, 2016, 121: 310-318.
[33] GULER S, ÖKER B, AKBULUT Z F. Workability, strength and toughness properties of different types of fiber-reinforced wet-mix shotcrete[J]. Structures, 2021, 31: 781-791.
[34] HAN J H, ZHAO M M, CHEN J Y, et al. Effects of steel fiber length and coarse aggregate maximum size on mechanical properties of steel fiber reinforced concrete[J]. Construction and Building Materials, 2019, 209: 577-591.
[35] 严捍东,吴仕成,桂苗苗.再生粗骨料最大堆积密度及其对混凝土性能影响[J].建筑材料学报,2015,18(3):482-486.
YAN H D, WU S C, GUI M M. Maximum packing density of recycled coarse aggregate and its effects on properties of concrete[J]. Journal of Building Materials, 2015, 18(3): 482-486 (in Chinese).
[36] RILEM D R. Determination of the fracture energy of mortar and concrete by means of three-point bend tests on notched beams[J].Materials and Structures, 1985, 18(4): 287-290.
[37] 中华人民共和国住房和城乡建设部.钢纤维混凝土:JG/T 472—2015[S].北京:中国标准出版社,2015.
Ministry of Housing and Urban-Rural Development of the People's Republic of China. Steel fiber reinforced concrete: JG/T 472—2015[S]. Beijing: China Standard Press, 2015 (in Chinese).
[38] 高丹盈,赵亮平,冯虎,等.钢纤维混凝土弯曲韧性及其评价方法[J].建筑材料学报,2014,17(5):783-789.
GAO D Y, ZHAO L P, FENG H, et al. Flexural toughness and it's evaluation method of steel fiber reinforced concrete[J]. Journal of Building Materials, 2014, 17(5): 783-789 (in Chinese).