含粗骨料超高性能混凝土力学性能研究及机理分析<sup>*</sup>

doi:10.11896/j.issn.1005-023X.2017.023.016

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Abstract In order to explore the mechanical properties of ultra-high performance concrete (UHPC) with coarse aggregate, the effects of coarse aggregate volume contents (0 kg/m³, 280 kg/m³, 400 kg/m³, 480 kg/m³, 560 kg/m³), fiber contents (2%, 2.5%) and fiber shape (flat type, hooked-end type) on compressive strength, elastic modulus and flexural strength of UHPC have been studied in the present work. Fiber orientation coefficient and effective length of fiber were introduced to explore microscopic mechanism for the influence of coarse aggregate content on flexural strength. The results demonstrated that coarse aggregate volume content affects little on the compressive strength (0.4%—4.5%); applies significant enhancement on the elastic modulus (maximum increment 7.8%); causes negative effect to flexural strength whose decrement will be fostered due to the declined orientation coefficient and effective length induced by coarse aggregate. Increasing fiber content or adding hooked-end fiber will benefit the flexural strength, in which hooked-end fiber reinforcement has greater effect in this experiment because of the substantial increment of fiber effective length.

Key words： coarse aggregate steel fiber ultra-high performance concrete mechanical properties orientation coefficient fiber effective length

Published: 10 December 2017 Online: 2018-05-08

CLC number:

TU528.572

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	Articles by authors
	CHENG Jun
	LIU Jiaping
	LIU Jianzhong
	ZHANG Qianqian
	ZHANG Lihui
	LIN Wei
	HAN Fangyu

Cite this article:

CHENG Jun,LIU Jiaping,LIU Jianzhong, et al. An Experimental Study and a Mechanism Analysis on Mechanical Properties of Ultra-high Performance Concrete with Coarse Aggregate[J]. Materials Reports, 2017, 31(23): 115-119.

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https://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2017.023.016 OR https://www.mater-rep.com/EN/Y2017/V31/I23/115

1 朋改非,滕岩,黄艳竹,等. 含粗骨料的超高性能混凝土抗火性研究综述[C]∥第三届两岸四地高性能混凝土国际研讨会论文集. 中国建材工业,2012: 330.
2 Huang Xiaoyan, Ranade Ravi, Ni Wen, et al. Development of green engineered cementitious composites using iron ore tailings as aggregates[J]. Constr Build Mater, 2013,44:757.
3 Cheng Jun, Liu Jiaping, Zhang Lihui. Uniaxial tension properties and mechanism analysis of ultra-high performance concrete containing coarse aggregate[J]. China Concr Cem Products, 2015,12(12):1(in Chinese).程俊,刘加平,张丽辉. 含粗骨料超高性能混凝土单轴拉伸性能及机理分析[J]. 混凝土与水泥制品, 2015,12(12):1.
4 Ma Jun, Yang Xiangning, Li Qiuyi. Selection of maximum particle size of coarse aggregate of steel fiber reinforced concrete[J]. Low Temperature Architecture Technol, 1997(2):37(in Chinese).
马军,杨向宁,李秋义. 钢纤维混凝土粗骨料最大粒径的选择[J]. 低温建筑技术, 1997(2):37.
5 Liu Jianzhong, Han Fangyu, Cui Gong, et al. Combined effect of coarse aggregate and fiber on tensile behavior of ultra-high perfor-mance concrete[J]. Constr Build Mater, 2016,121:310.
6 Chen Huisu, Sun Wei. Interfacial transition zone between aggregate and paste in cementtitious composites(I): Experimental techniques[J]. J Chin Ceram Soc, 2004(1): 70(in Chinese).
陈惠苏,孙伟. 水泥基复合材料集料与浆体界面研究综述(一):实验技术[J]. 硅酸盐学报, 2004(1): 70.
7 中华人民共和国国家质量监督检验检疫总局. GB/T 31387-2015 活性粉末混凝土[S]. 北京:中国标准出版社,2015.
8 Lee Y H, Lee S W, Youn J R, et al. Characterization of fiber orientation in short fiber reinforced composites with an image processing technique[J]. Mater Res Innovations, 2002,6(2): 65.
9 Zak G, Park C B, Benhabib B. Estimation of three-dimensional fibre-orientation distribution in short-fibre composites by a two-section method[J]. J Compos Mater, 2001, 35(4): 316.
10 Zhang Xiaohui. Study on the bending fatigue and damage properties and micro-strength of steel fiber reinforced concrete[D]. Kunming: Kunming University of Science and Technology, 2001(in Chinese).
张小辉. 钢纤维混凝土弯曲疲劳及其损伤特性和细观强度研究[D]. 昆明:昆明理工大学,2001.