基于灰色关联与二分法的无机矿物聚合物强度特性研究<sup>*</sup>

doi:10.11896/j.issn.1005-023X.2017.023.027

Abstract
Figure/Table
References
Related Citation (15)

Download:

Full Text ( PDF ) (1038KB)
Export: BibTeX | EndNote (RIS)

Abstract The influence of oxide composition on the dominant factors of strength in geopolymer was studied by combining gray relational analysis and dichotomy. It was found that the geopolymer could be divided into two regions according to the dominance factor of strength. In regionⅠ where the CaO content of geopolymer was less than 25%, the strength was dominated by the ratio of activity oxides (n(SiO₂)/n(Al₂O₃)). The other was the regionⅡ. CaO content of geopolymer in this area was more than 25%, and the strength was dominated by CaO content. By performing the strength fitting in these two regions respectively, the results showed that the region Ⅰ was in accordance with the binary polynomial function and the region Ⅱ was conformed to the binary Fourier function.The projection of fitting surface showed that when the modulus of the water glass was selected form 0.8 to 1.6, low modulus water glass had better stimulation effect in regionⅠ.When n(CaO)/n(SiO₂+Al₂O₃) was less than 0.3, the strength of geopolymer increased with the increase of n(SiO₂)/n(Al₂O₃) . But if n(CaO)/n(SiO₂+Al₂O₃) was more than 0.3, the effect of n(CaO)/n (SiO₂+Al₂O₃) on strength began to show up, and with the increase of n(SiO₂)/n(Al₂O₃), the strength increased first and then decreased. However, high modulus water glass had better stimulation effect in regionⅡ. The highest strength region appeared in the region where n(CaO)/n(SiO₂+Al₂O₃) was large, when activated with low modulus water glass.With the increasing modulus of activator, the n(CaO)/n(SiO₂+Al₂O₃) of highest strength region decreased.

Key words： geopolymer strength dominant factor calcium oxide content silica/alumina molar ratio calcium oxide/(silica+alumina) molar ratio

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

CLC number:

TU58

	Service
	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	WANG Qing
	LI Tianru
	ZHANG Qiang
	DING Zhaoyang

Cite this article:

WANG Qing,LI Tianru,ZHANG Qiang, et al. Strength Characteristics of Geopolymer Based on Gray Relation and Dichotomy[J]. Materials Reports, 2017, 31(23): 182-186.

URL:

https://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2017.023.027 OR https://www.mater-rep.com/EN/Y2017/V31/I23/182

1 Zheng Juanrong, Qin Weizu.Recent progress of geopolymeric materials[J].New Build Mater,2002(4):11(in Chinese).
郑娟荣, 覃维祖.地聚物材料的研究进展[J].新型建筑材料,2002(4):11.
2 Dai Xinxiang, Wen Ziyun.Present status on the research and application of geopolymer[J].Cement,2001(10):11(in Chinese).
代新祥,文梓芸.土聚水泥的应用及研究现状[J].水泥,2001(10):11.
3 Davidovits J. Synthetic mineral polymer compound of the silicoaluminates family and preparation process: US, 4472199[P]. 1984-09-18.
4 Jaarsveld J G S V, Deventer J S J V, Schwartzman A. The potential use of geopolymeric materials to immobilise toxic metals: Part Ⅱ. Material and leaching characteristics[J]. Minerals Eng, 1999, 12(1):75.
5 Phair J V, Van Deventer J S J. Effect of the silicate activator pH on the microstructural characteristics of vrite-based geopolymers[J].Int J Mineral Processing, 2002,66(1):121.
6 Nath P, Sarker P K. Use of OPC to improve setting and early strength properties of low calcium fly ash geopolymer concrete cured at room temperature[J]. Cem Concr Compos, 2015, 55:205.
7 Liang Benliang, Liu Jianxin.Grey correlation analysis of sensitive factors of concrete structures durability[J].Sichuan Build Sci,2009,35(4):75(in Chinese).
梁本亮,刘建新. 基于灰色关联的混凝土结构耐久性影响因子分析[J]. 四川建筑科学研究,2009,35(4):75.
8 Yang Lirong, Wang Chunmei, Feng Xiaoxin, et al.Preparation and consolidation mechanism of fly ash-based geopolymer incorporating slag[J]. J Wuhan University of Technology,2009,31(7):115(in Chinese).
杨立荣,王春梅,封孝信,等. 粉煤灰/矿渣基地聚合物的制备及固化机理研究[J]. 武汉理工大学学报,2009,31(7):115.
9 Gao Xu.Study on the preparation and microstructure of alkali activated metakaolin-slag mixtures[D].Wuhan:Wuhan University of Technology, 2013(in Chinese).
高旭. 碱激发偏高岭土——矿渣胶凝材料的制备与微观结构研究[D]. 武汉:武汉理工大学, 2013.