Crystal structure of magnesium silicate hydrates (M-S-H): The relation with 2:1 Mg-Si phyllosilicates

被引：166

作者：

Roosz, Cedric ^{[1
,2
]}

Grangeon, Sylvain ^{[2
]}

Blanc, Philippe ^{[2
]}

Montouillout, Valerie ^{[3
]}

Lothenbach, Barbara ^{[4
]}

Henocq, Pierre ^{[1
]}

Giffaut, Eric ^{[1
]}

Vieillard, Philippe ^{[5
]}

Gaboreau, Stephane ^{[2
]}

机构：

[1] Andra Sci Div, F-92298 Chatenay Malabry, France

[2] Bur Rech Geol & Minieres, F-45060 Orleans 2, France

[3] CNRS, CEMHTI, UPR 3079, F-45071 Orleans, France

[4] Empa, Lab Concrete & Construct Chem, CH-8600 Dubendorf, Switzerland

[5] Univ Poitiers, CNRS, IC2MP, Equipe HydrASA,UMR7285, F-86022 Poitiers, France

来源：

CEMENT AND CONCRETE RESEARCH | 2015年 / 73卷

关键词：

MgO; Silica fume; X-ray diffraction; Crystal structure; Hydration products; X-RAY-DIFFRACTION; PH CEMENTITIOUS MATERIALS; RESOLUTION SI-29 NMR; LAYER SILICATES; PARTICLE-SIZE; HYDROTHERMAL SYNTHESIS; ELECTRON-MICROSCOPY; SYNTHETIC TALC; MINERALS; MODEL;

D O I：

10.1016/j.cemconres.2015.03.014

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Two magnesium silicate hydrates (M-S-H) with structural magnesium/silicon ratios of 0.57 +/- 0.08 and 1.07 +/- 0.13 were synthesized at room temperature, with one year of synthesis duration. Their structure was clarified by considering results from X-ray diffraction, TEM, Si-29 MAS NMR spectroscopy, TGA, and EPMA. A modeling approach appropriate to defective minerals was used because usual XRD refinement techniques cannot be used in the case of turbostratic samples, where coherency between successive layers is lost. M-S-H with Mg/Si ratio of similar to 0.6 appears to be structurally close to nanocrystalline turbostratic 2:1 Mg-Si phyllosilicates. The increase of the Mg/Si ratio from 0.6 to 1.2 occurs by increasing the occurrence of defects in the silicate plan. The layer-to-layer distance evolves from 9.46 angstrom to 14 angstrom under air-dried and ethylene glycol conditions, respectively. Crystallites have a mean size of 1.5 nm in the ab plane, and 2.4 nm along c*. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：228 / 237

页数：10

共 88 条

[1] UNIT-CELL OF TALC [J].

AKIZUKI, M ;

ZUSSMAN, J .

MINERALOGICAL MAGAZINE, 1978, 42 (321) :107-110

[2]

ALEXIADES CA, 1967, AM MINERAL, V52, P1855

[3] THERMAL BEHAVIOR OF GROUND TALC MINERAL [J].

Balek, V. ;

Subrt, J. ;

Perez-Maqueda, L. A. ;

Benes, M. ;

Bountseva, I. M. ;

Beckman, I. N. ;

Perez-Rodriguez, J. L. .

JOURNAL OF MINING AND METALLURGY SECTION B-METALLURGY, 2008, 44 (01) :7-17

[4]

Bethke C.M., 2014, The Geochemist's Workbench Release 10.0: GWB essentials guide

[5] Thermodynamics of manganese oxides: Effects of particle size and hydration on oxidation-reduction equilibria among hausmannite, bixbyite, and pyrolusite [J].

Birkner, Nancy ;

Navrotsky, Alexandra .

AMERICAN MINERALOGIST, 2012, 97 (8-9) :1291-1298

[6] DEWEYLITES, MIXTURES OF POORLY CRYSTALLINE HYDROUS SERPENTINE AND TALC-LIKE MINERALS [J].

BISH, DL ;

BRINDLEY, GW .

MINERALOGICAL MAGAZINE, 1978, 42 (321) :75-79

[7] Thermoddem: A geochemical database focused on low temperature water/rock interactions and waste materials [J].

Blanc, Ph ;

Lassin, A. ;

Piantone, P. ;

Azaroual, M. ;

Jacquemet, N. ;

Fabbri, A. ;

Gaucher, E. C. .

APPLIED GEOCHEMISTRY, 2012, 27 (10) :2107-2116

[8] Synthesis and characterisation of magnesium silicate hydrate gels [J].

Brew, DRM ;

Glasser, FP .

CEMENT AND CONCRETE RESEARCH, 2005, 35 (01) :85-98

[9]

Brindley G.W., 1977, MINERAL MAG, V41, P433

[10]

Brindley G.W., 1954, AM MINERAL, V40, P239

← 1 2 3 4 5 6 7 8 9 →