Role of metakaolin dehydroxylation in geopolymer synthesis

被引：109

作者：

Autef, Alexandre ^{[1
]}

Joussein, Emmanuel ^{[2
]}

Gasgnier, Gilles ^{[3
]}

Pronier, Stephane ^{[4
]}

Sobrados, Isabella ^{[5
]}

Sanz, Jesus ^{[5
]}

Rossignol, Sylvie ^{[1
]}

机构：

[1] Ecole Natl Super Ceram Ind, Grp Etud Mat Heterogenes GEMH ENSCI, F-87068 Limoges, France

[2] Univ Limoges, GEESE, EA 4330, F-87060 Limoges, France

[3] Imerys Ceram Ctr, F-87000 Limoges, France

[4] Univ Poitiers, CNRS, Inst Chim Milieux & Mat Poitiers IC2MP, UMR 7285, F-86022 Poitiers, France

[5] CSIC, Inst Ciencia Mat Madrid, Madrid 28049, Spain

来源：

POWDER TECHNOLOGY | 2013年 / 250卷

关键词：

Kaolinite; Metakaolinite; Dehydroxylation; Geopolymer; Reactivity; Raw material; ROOM-TEMPERATURE; SILICA SOURCE; KAOLINITE; SI-29; DISSOLUTION; EXISTENCE; MINERALS; AL-27; STATE;

D O I：

10.1016/j.powtec.2013.09.022

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The properties and structures of three commercial metakaolins were evaluated for their use in geopolymer materials. The dehydroxylation processes used on these three metakaolins (rotary, flash or oven processes) induce varying reactivities and purities according to the results obtained by FTIR spectroscopy, XRD, Al-27 MAS-NMR, TEM characterization, and DTA. The flash-calcined metakaolin is the most reactive one. After geopolymerization, the impurities (such as quartz or micas) and the reactivities of the raw metakaolins induce the formation of different networks within the geopolymer material. This study demonstrates the main role of the metakaolin dehydroxylation process, the effect of impurities and the use of the wettability as an indicator of metakaolin reactivity. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：33 / 39

页数：7

共 44 条

[1] Properties of blended cements with thermally activated kaolin [J].

Arikan, Metin ;

Sobolev, Konstantin ;

Ertuen, Tomris ;

Yeginobali, Asim ;

Turker, Pelin .

CONSTRUCTION AND BUILDING MATERIALS, 2009, 23 (01) :62-70

[2] Influence of metakaolin purities on potassium geopolymer formulation: The existence of several networks [J].

Autef, A. ;

Joussein, E. ;

Poulesquen, A. ;

Gasgnier, G. ;

Pronier, S. ;

Sobrados, I. ;

Sanz, J. ;

Rossignol, S. .

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 2013, 408 :43-53

[3] Role of the silica source on the geopolymerization rate: A thermal analysis study [J].

Autef, A. ;

Joussein, E. ;

Gasgnier, G. ;

Rossignol, S. .

JOURNAL OF NON-CRYSTALLINE SOLIDS, 2013, 366 :13-21

[4] Role of the silica source on the geopolymerization rate [J].

Autef, A. ;

Joussein, E. ;

Gasgnier, G. ;

Rossignol, S. .

JOURNAL OF NON-CRYSTALLINE SOLIDS, 2012, 358 (21) :2886-2893

[5]

Autef A., 2013, MAT SCI ENG B UNPUB

[6]

BACHIORRINI A, 1986, CR ACAD SCI II, V303, P1783

[7] Synthesis and thermal behaviour of potassium sialate geopolymers [J].

Barbosa, VFF ;

MacKenzie, KJD .

MATERIALS LETTERS, 2003, 57 (9-10) :1477-1482

[8] Kaolinite transformation in high molar KOH solutions [J].

Bauer, A ;

Velde, B ;

Berger, G .

APPLIED GEOCHEMISTRY, 1998, 13 (05) :619-629

[9] TEM study of kaolinite thermal decomposition by controlled-rate thermal analysis [J].

Bergaya, F ;

Dion, P ;

Alcover, JF ;

Clinard, C ;

Tchoubar, D .

JOURNAL OF MATERIALS SCIENCE, 1996, 31 (19) :5069-5075

[10] Influence of degree of dehydroxylation on the pozzolanic activity of metakaolin [J].

Bich, Ch. ;

Ambroise, J. ;

Pera, J. .

APPLIED CLAY SCIENCE, 2009, 44 (3-4) :194-200

← 1 2 3 4 5 →