具有超高延性的再生微粉水泥基复合材料的力学性能

doi:10.11896/cldb.17110286

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Abstract The ultra-high toughness cementitious composites (UHTCC) was developed by taking the recycled powder (RP) of construction waste as the substitute of fly ash. The tensile and compressive properties of UHTCC with diverse substitution rates of RP were studied, and the impact of RP on the the mechanical property of UHTCC was explored. Stable strain hardening behavior and multiple cracking responses of RP-UHTCC were obviously observed by axial tensile test. The test results indicated that the tensile strength of RP-UHTCC were about 4—5 MPa (2—3 times of that of ordinary concrete), while the tensile strain capacity reached 7% to 9% (possessing ultra high tensile deformability equivalent to the steel rebar). It indicated that incorporating RP did not change the superior tensile capacity of UHTCC. The axial compressive test showed that the peak compressive strength of RP-UHTCC was about 21 MPa to 23 MPa. The compressive strains corresponding to the 80% peak compressive strength were 18.28‰ and 26.18‰, indicating the high compressive deformation ability of RP-UHTCC. Furthermore, 3-point bending test and single crack tension test were carried out on notched beams and notched dog-bone specimens, respectively, for the sake of studying the effect of the incorporation of RP on the fracture toughness of matrix and bridging ability of fibers. It was found that the fracture toughness of matrix remained unchanged while the bridging ability of fibers increased with the increasing substitution rate of RP. Finally, the explanation and evaluation to the ductility of RP-UHTCC were given by the derived PSH criterion. In this study, the feasibility of recycled powder for producing the ultra-high toughness cementitious composites was verified through experiments.

Key words： strain hardening recycled powder cementitious composites

Published: 28 April 2019

CLC number:

TU528.58

Fund:This work was financially supported by the National Natural Science Foundation of China (51478362,51778461).

About author:: Jiangtao Yu, works as full-time professor and supervisor of Ph.D. student in the College of Civil Engineering at Tongji University. His research interests are the deve-lopment of high performance of fiber reinforced concrete and its application in civil engineering. He published more than 100 scientific papers in English or in Chinese journals and awarded one national science and techno-logy invention prize and two Shanghai science and technology progress prizes.

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	YU Jiangtao
	TIAN Likang
	WANG Yichao
	LIU Keke

Cite this article:

YU Jiangtao,TIAN Likang,WANG Yichao, et al. Mechanical Property of Recycled Micro-powder Cementitious Composites with Ultra-high Ductility[J]. Materials Reports, 2019, 33(8): 1328-1334.

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http://www.mater-rep.com/EN/10.11896/cldb.17110286 OR http://www.mater-rep.com/EN/Y2019/V33/I8/1328

1 Zhou Wenjuan, Chen Jialong, Lu Hongbo.Architecture Technology, 2009(8),741(in Chinese).
周文娟,陈家珑,路宏波.建筑技术,2009(8),741.
2 Lyu Xueyuan. Foundational properties and applications on recycled powder.Master's Thesis, Qingdao Technological University, China, 2009(in Chinese).
吕雪源.再生微粉的基本性能及应用.硕士学位论文,青岛理工大学,2009.
3 Zhao Guiyun. Basic properties and activation technology of the recycled concrete powder. Master's Thesis,China University of Mining and Technology, China, 2014(in Chinese).
赵桂云.混凝土再生微粉基本性能及其活化技术.硕士学位论文,中国矿业大学,2014.
4 吕雪源, 张健, 李秋义.商品混凝土, 2009(3),28.
5 Zhang Xiuqin, Li Qiuyi, Xie Rupeng,et al. Fly Ash Comprehensive Utilization, 2016(3),3(in Chinese).
张修勤, 李秋义, 谢汝朋,等.粉煤灰综合利用, 2016(3),3.
6 Xu Shilang, Li Hedong.China Civil Engineering Jounal, 2009(9),32(in Chinese).
徐世烺, 李贺东.土木工程学报, 2009(9),32.
7 Li V C, Leung C K Y. Journal of Engineering Mechanics, 1992, 118(11),2246.
8 Yu K, Wang Y, Yu J, et al. Construction & Building Materials, 2017, 137,410.
9 Lu Zhoudao, Lin Chenxu, Yu Jiangtao, et al. Journal of Tongji University (Natural Science), 2017, 45(6),880(in Chinese).
陆洲导, 林晨旭, 余江滔,等.同济大学学报(自然科学版), 2017, 45(6),880.
10 JSCE. Recommendations for design and construction of high performance fiber reinforced cement composites with multiple fine cracks. Tokyo:Japan Society of Civil Engineers, 2008,pp.1.
11 中华人民共和国住房和城乡建设部.GB/T 50476-2008混凝土结构耐久性设计规范. 中国建筑工业出版社,2008,pp.162.
12 Li V C, Wang S, Wu C. ACI Materials Journal—American Concrete Institute, 2001, 98(6), 483.
13 Li V C, Wu C, Wang S, et al. Materials Journal, 2002, 99(5),463.
14 中华人民共和国住房和城乡建设部.GB 50011-2010,建筑抗震设计规范. 中国建筑工业出版社,2008,pp.609.
15 中国国家标准化管理委员会. GB/T 1499.2-2018钢筋混凝土用钢第2部分:热轧带肋钢筋.中国建筑工业出版社,2018.
16 Kanda T, Li V C. Journal of Engineering Mechanics, 1999, 125(4),373.
17 中华人民共和国国家发展和改革委员会. DL/T 5332-2005水工混凝土断裂试验规程.中国电力出版社,2005,pp.739.