纤维/混杂纤维-矿渣地质聚合物复合材料的弯曲强度与弯曲韧性*

doi:10.11896/j.issn.1005-023X.2017.022.024

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Abstract Alkali-activated slag geopolymers have some weaknesses, such as high brittleness, poor toughness, and easy to crack. In this study, fiber/hybrid fibers were used to modify the slag geopolymer. The flexural strength and flexural toughness of the fiber slag geopolymer composites were taken as an index to analyze the reinforcing and toughening effect of three single fibers and two kinds of hybrid fibers on the slag geopolymers. The results indicate that the reinforcing effect of carbon fiber is better than that of steel fiber and basalt fiber, and the toughening effect of steel fiber is better than the others, whereas basalt fiber has relatively poor performance in both reinforcing and toughening effect.Mixing carbon fiber and steel fiber can give full play to the reinforcing effect of carbon fiber and the toughening effect of steel fiber, and adding appropriate amount of mixed fiber will make the materials better in both strength and toughness than the single fiber; The unit weight difference between fiber and slurry has an important effect on the homogenization of the slag geopolymer. The mixture of carbon fiber and steel fiber can significantly reduce the flexural strength and flexural toughness of slag geopolymers under different loading directions.

Key words： alkali-activated slag geopolymer fiber hybrid fiber flexural strength flexural toughness

Published: Online: 2018-05-08

CLC number:

TU528.572

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	Articles by authors
	SONG Xuefeng
	WANG Jun
	WANG Yan

Cite this article:

SONG Xuefeng,WANG Jun,WANG Yan. Flexural Strength and Flexural Toughness of Fiber/Hybrid Fibers and Slag geopolymers Composites[J]. Materials Reports, 2017, 31(22): 121-124.

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https://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2017.022.024 OR https://www.mater-rep.com/EN/Y2017/V31/I22/121

1 Davidovits J. 30 years of successes and failures in geopolymer application, market trends and potential breakthroughs[C]//Geopolymer 2002 Conference. Melbourne, Australia, 2002.
2 Shi C, Fernandez-Jiminez A, Palomo A. New cements for the 21st century: The pursuits of an alternative to portland cement[J]. Cem Concr Res, 2011,41(7):750.
3 Thomas R J, Ye H, Radlińska A, et al. Alkali-activated slag concrete: A closer look at sustainable alternatives to portland cement[J]. Concr Int, 2016,38:33.
4 Sofi M, van Deventer J S J, Mendis P A, et al. Engineering properties ofinorganic polymer concretes[J]. Cem Concr Res, 2007,37(2):251.
5 Glasby T, Day J, Genrich R, et al. EFC geopolymer concrete aircraft pavements at brisbane west wellcamp airport[C]//Concrete Institute of Australia Conference, 27th, 2015. Melbourne, Victoria, Australia. 2015.
6 Davidovits J. Recent progresses in concretes for nuclear waste and uranium waste containment[J]. Concr Int, 1994,16(12):53.
7 Davidovits J, Davidovics M. Geopolymer: Ultra-high temperature tooling material for the manufacture of advanced composites[J]. Sci Adv Mater Process Eng, 1991,36:1939.
8 Lyon R E. Fire response of geopolymer structural composites[R]. Federal Aviation Administration Washington DC Office of Aviation Research, 1996.
9 Collins F, Sanjayan J. Effect of pore size distribution on drying shrinking of alkaliactivated slag concrete[J]. Cem Concr Res, 2000,30:1401.
10 IsmailI I, Bernal S A, Provis J L, et al. Drying-inducedchanges in the structure of alkali-activated pastes[J]. J Mater Sci,2013,48:3566.
11 Gu Yamin, Fang Yonghao. Shrinkage, cracking, shrinkage-reducing and toughening of alkali-activated slag cement. A short review[J]. J Chin Ceram Soc, 2012,40(1):76(in Chinese).
顾亚敏, 方永浩. 碱矿渣水泥的收缩与开裂特性及其减缩与增韧[J].硅酸盐学报, 2012,40(1):76.
12 Zieliński K, Olszewski P. The impact of basaltic fiber on selected physical and mechanical properties of cement mortar[J]. Concr Precasting Plant Technol, 2005,71(3):28.
13 Li Weimin, Xu Jinyu. Mechanical properties of basalt fiber reinforced geopolymeric concrete under impact loading[J]. Mater Sci Eng, 2009,505(1-2):178.
14 Zhang Jun, Ju Xianchun, Guo Zili. Tensile properties of fiber reinforced cement composite with different PVA fibers[J]. J Building Mater, 2009,12(6):706(in Chinese).
张君, 居贤春, 郭自力. PVA纤维直径对水泥基复合材料抗拉性能的影响[J]. 建筑材料学报, 2009,12(6):706.
15 Sun Wei, Qing Hongping, Cheng Huisu. The effect of the combination of hybrid fibers and expansive agent on the physical properties of cementitious composite[J]. J Chin Ceram Soc, 2000,28(2):95(in Chinese).
孙伟, 钱红萍, 陈惠苏. 纤维混杂及其与膨胀剂复合对水泥基材料的物理性能的影响[J]. 硅酸盐学报, 2000,28(2):95.