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

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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: 08 May 2018

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TU58

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	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.

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

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