Effects of nano-silica on the strength development of geopolymer cured at room temperature

被引：155

作者：

Deb, Partha Sarathi ^{[1
]}

Sarker, Prabir Kumar ^{[1
]}

Barbhuiya, Salim ^{[1
]}

机构：

[1] Curtin Univ, Dept Civil Engn, Perth, WA 6845, Australia

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2015年 / 101卷

关键词：

Blended fly ash; Compressive strength; Geopolymer; Microstructure; Nano-silica; FLY-ASH; ACTIVATION; WORKABILITY; NANOSILICA;

D O I：

10.1016/j.conbuildmat.2015.10.044

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Use of nano-silica is gaining wider attention due to its significant effect on the microstructural and mechanical properties of Portland cement based binders. Effects of the incorporation of nano-silica in fly ash based geopolymer binders have been investigated in this study. Low-calcium fly ash was used as the principal source of aluminosilicate and it was blended with either blast furnace slag or Portland cement at small percentages in order to accelerate the curing at room temperature. Nano-silica was used at a rate up to 3% of the total binder in order to understand its effect on the strength and microstructural development. The experimental results show that the strength and microstructural properties could be further developed with inclusion of nano-silica in geopolymer mixes. Compressive strength increased with the increase of nano-silica content up to 2%. Scanning electron microscopy (SEM) images showed denser microstructures with well-connected interlocking morphology for the optimum nano-silica dosage. The strength increase is contributed by densification of the microstructure with the addition of nano-silica. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：675 / 683

页数：9

共 56 条

[21]

Fernandez J.A., 2009, FUEL, V82, P2259

[22] The role played by the reactive alumina content in the alkaline activation of fly ashes [J].

Fernández-Jiménez, A ;

Palomo, A ;

Sobrados, I ;

Sanz, J .

MICROPOROUS AND MESOPOROUS MATERIALS, 2006, 91 (1-3) :111-119

[23] Quantitative determination of phases in the alkali activation of fly ash.: Part I.: Potential ash reactivity [J].

Fernández-Jimenez, A ;

de la Torre, AG ;

Palomo, A ;

López-Olmo, G ;

Alonso, MM ;

Aranda, MAG .

FUEL, 2006, 85 (5-6) :625-634

[24] Composition and microstructure of alkali activated fly ash binder:: Effect of the activator [J].

Fernández-Jiménez, A ;

Palomo, A .

CEMENT AND CONCRETE RESEARCH, 2005, 35 (10) :1984-1992

[25] The effect of silica availability on the mechanism of geopolymerisation [J].

Hajimohammadi, Ailar ;

Provis, John L. ;

van Deventer, Jannie S. J. .

CEMENT AND CONCRETE RESEARCH, 2011, 41 (03) :210-216

[26] Investigation of a synthetic aluminosilicate inorganic polymer [J].

Hos, JP ;

McCormick, PG ;

Byrne, LT .

JOURNAL OF MATERIALS SCIENCE, 2002, 37 (11) :2311-2316

[27] A new method to evaluate the hydraulic activity of Al-Si materials [J].

HuaJian, Li ;

HengHu, Sun ;

Xuchu, Tie ;

XueJun, Xiao .

SCIENCE IN CHINA SERIES E-TECHNOLOGICAL SCIENCES, 2008, 51 (02) :113-120

[28] Mechanism of geopolymerization and factors influencing its development: a review [J].

Khale, Divya ;

Chaudhary, Rubina .

JOURNAL OF MATERIALS SCIENCE, 2007, 42 (03) :729-746

[29] Properties of high-volume fly ash concrete incorporating nano-SiO2 [J].

Li, GY .

CEMENT AND CONCRETE RESEARCH, 2004, 34 (06) :1043-1049

[30] Influence of slag as additive on compressive strength of fly ash-based geopolymer [J].

Li, Zongjin ;

Liu, Sifeng .

JOURNAL OF MATERIALS IN CIVIL ENGINEERING, 2007, 19 (06) :470-474

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