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CT scanning of internal crack mechanism and strength behavior of cement-fiber-tailings matrix composites

文献类型：期刊论文

作者Cao, Shuai3,4,5; Yilmaz, Erol2; Yin, Zhenyu3; Xue, Gaili4,5; Song, Weidong4,5; Sun LJ(孙立娟)1
刊名CEMENT & CONCRETE COMPOSITES
出版日期2021-02-01
卷号116页码:14
ISSN号0958-9465
关键词Cement-fiber-tailings matrix composites Polypropylene-polyacrylonitrile fibers Industrial computed tomography Compressive strength Microstructural properties 3D model reconstruction
DOI10.1016/j.cemconcomp.2020.103865
通讯作者Cao, Shuai(sandy_cao@ustb.edu.cn) ; Yilmaz, Erol(erol.yilmaz@erdogan.edu.tr) ; Yin, Zhenyu(zhenyu.yin@polyu.edu.hk)
英文摘要This paper deals the relationship between compressive strength and internal crack formation (e.g., crack width and volume) of cement-fiber-tailings matrix composites (CFTMC) using an industrial computed tomography system and scanning electron microscopy. Two types of fibers (polypropylene PP and polyacrylonitrile PAN) were used to manufacture CFTMC with a constant cement-to-tailings ratio, solid content and curing time of 1:6, 75 wt% and 14 days, respectively. The results showed that strength gaining of CFTMC increased remarkably with fiber additions which effectively improve its toughness. When compared to samples without fibers, the compressive strength of CFTMC was the highest because of the reduced interconnection between pores and high particle packing density. The internal structure analysis showed that the maximum crack widths of CFTMC increased when the fiber content increased from 0.3 to 0.6 wt%, regardless of fiber type, growing the crack volumes of samples. The failure pattern of all CFTMC samples was mainly tensile, shear and mixed failure (tensile/shear), and a high strength value accompanies with a big volume of crack. At last, the findings of this study may offer a key reference for fiber-reinforced backfills, which can lift their strength, stability and integrity behavior under extreme conditions, such as rock burst, squeezing ground, blast or seismic event.
分类号一类
WOS关键词MICROSTRUCTURAL PROPERTIES ; COMPRESSIVE STRENGTH ; COMPUTED-TOMOGRAPHY ; REINFORCED CONCRETE ; ULTRASONIC PROPERTIES ; SIZE DISTRIBUTION ; PASTE ; BACKFILL ; MINE ; TEMPERATURE
资助项目National Natural Science Foundation of China[51804017] ; Opening Fund of State Key Laboratory of Nonlinear Mechanics[LNM202009] ; Fundamental Research Funds for Central Universities[FRF-TP-20-001A2]
WOS研究方向Construction & Building Technology ; Materials Science
语种英语
WOS记录号WOS:000608491400003
资助机构National Natural Science Foundation of China ; Opening Fund of State Key Laboratory of Nonlinear Mechanics ; Fundamental Research Funds for Central Universities
其他责任者Cao, Shuai ; Yilmaz, Erol ; Yin, Zhenyu
源URL[http://dspace.imech.ac.cn/handle/311007/85998]  
专题力学研究所_非线性力学国家重点实验室
作者单位1.Chinese Acad Sci, State Key Lab Nonlinear Mech, Inst Mech, Beijing 100190, Peoples R China
2.Recep Tayyip Erdogan Univ, Dept Civil Engn, Geotech Div, TR-53100 Rize, Turkey;
3.Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hung Hom, Kowloon, Hong Kong, Peoples R China;
4.Univ Sci & Technol Beijing, Sch Civil & Resources Engn, Beijing 100083, Peoples R China;
5.Univ Sci & Technol Beijing, Minist Educ, State Key Lab High Efficient Min & Safety Met Min, Beijing 100083, Peoples R China;
推荐引用方式
GB/T 7714		 Cao, Shuai,Yilmaz, Erol,Yin, Zhenyu,et al. CT scanning of internal crack mechanism and strength behavior of cement-fiber-tailings matrix composites[J]. CEMENT & CONCRETE COMPOSITES,2021,116:14.
APA Cao, Shuai,Yilmaz, Erol,Yin, Zhenyu,Xue, Gaili,Song, Weidong,&孙立娟.(2021).CT scanning of internal crack mechanism and strength behavior of cement-fiber-tailings matrix composites.CEMENT & CONCRETE COMPOSITES,116,14.
MLA Cao, Shuai,et al."CT scanning of internal crack mechanism and strength behavior of cement-fiber-tailings matrix composites".CEMENT & CONCRETE COMPOSITES 116(2021):14.

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来源：力学研究所

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