Composition design and performance of alkali-activated cements

被引：131

作者：

Li, Ning ^{[1
]}

Shi, Caijun ^{[1
]}

Wang, Qing ^{[2
,3
]}

Zhang, Zuhua ^{[1
,4
]}

Ou, Zhihua ^{[5
]}

机构：

[1] Hunan Univ, Coll Civil Engn, Changsha 410012, Hunan, Peoples R China

[2] Northeastern Univ, Sch Met, Shenyang 110003, Peoples R China

[3] Shenyang Jianzhu Univ, Sch Mat Sci & Engn, Shenyang 110168, Peoples R China

[4] Univ Southern Queensland, Ctr Future Mat, Toowoomba, Qld 4350, Australia

[5] Hunan Univ Technol, Sch Civil Engn, Zhuzhou 412007, Peoples R China

来源：

MATERIALS AND STRUCTURES | 2017年 / 50卷 / 03期

基金：

中国国家自然科学基金; 澳大利亚研究理事会;

关键词：

Alkali-activation; SiO2-Al2O3-CaO system; Composition design; Setting time; Strength; Microstructure; BLAST-FURNACE SLAG; CALCIUM SILICATE HYDRATE; MECHANICAL-PROPERTIES; S-H; INORGANIC POLYMER; PRODUCTS; GEOPOLYMERISATION; MICROSTRUCTURE; MICROANALYSIS; METAKAOLIN;

D O I：

10.1617/s11527-017-1048-0

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

In the present work, the relationship between the composition of the SiO2-Al2O3-CaO precursor system and the setting time, microstructure and mechanical properties of the resulting alkali-activated cement (AAC) were investigated. The results showed that with the increase of metakaolin content and the modulus of activator solution, setting time of alkali-activated cements was prolonged. The compressive strength increased with the increase of CaO content to a certain extent, but had different trends as Si/Al ratio varied. Microstructural analyses revealed that CaO content had remarkable effects on the microstructure of AAC. In calcium-free system, the strength was dependent on the three-dimensional structure of N-A-S-H gels. As the CaO content increased gradually, the main activation product changed from N-A-S-H to C-(A)-S-H gel, resulting in a more compact structure. This investigation helps to build up a practical approach for the composition design of alkali-activated cements.

引用

页数：11

共 50 条

[1] Durability of Alkali- Activated Materials: Progress and Perspectives [J].

Bernal, Susan A. ;

Provis, John L. .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2014, 97 (04) :997-1008

[2] Activation of Metakaolin/Slag Blends Using Alkaline Solutions Based on Chemically Modified Silica Fume and Rice Husk Ash [J].

Bernal, Susan A. ;

Rodriguez, Erich D. ;

de Gutierrez, Ruby Mejia ;

Provis, John L. ;

Delvasto, Silvio .

WASTE AND BIOMASS VALORIZATION, 2012, 3 (01) :99-108

[3] Reaction progress of alkaline-activated metakaolin-ground granulated blast furnace slag blends [J].

Buchwald, Anja ;

Tatarin, R. ;

Stephan, D. .

JOURNAL OF MATERIALS SCIENCE, 2009, 44 (20) :5609-5617

[4] A study on the setting characteristics of sodium silicate-activated slag pastes [J].

Chang, JJ .

CEMENT AND CONCRETE RESEARCH, 2003, 33 (07) :1005-1011

[5]

Chen X, 2008, RES PREPARATION MICR

[6] Fire-resistant geopolymer produced by granulated blast furnace slag [J].

Cheng, TW ;

Chiu, JP .

MINERALS ENGINEERING, 2003, 16 (03) :205-210

[7]

Davidovits J., 1994, 1 INT C ALK CEM CONC, P131

[8] Geopolymer technology:: the current state of the art [J].

Duxson, P. ;

Fernandez-Jimenez, A. ;

Provis, J. L. ;

Lukey, G. C. ;

Palomo, A. ;

van Deventer, J. S. J. .

JOURNAL OF MATERIALS SCIENCE, 2007, 42 (09) :2917-2933

[9] Understanding the relationship between geopolymer composition, microstructure and mechanical properties [J].

Duxson, P ;

Provis, JL ;

Lukey, GC ;

Mallicoat, SW ;

Kriven, WM ;

van Deventer, JSJ .

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 2005, 269 (1-3) :47-58

[10] 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

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