Synthesis and characterisation of magnesium silicate hydrate gels

D R M  Brew; F P  Glasser

doi:10.1016/j.cemconres.2004.06.022

Synthesis and characterisation of magnesium silicate hydrate gels

D R M Brew, F P Glasser

Chemistry

Research output: Contribution to journal › Article

285 Citations (Scopus)

Abstract

Magnesium silicate hydrate gels (M-S-H) have been prepared by precipitation. The range of gel compositions lie between Mg/Si molar ratios 0.67-1.0. The gels were subject to short cure, approximately 24 h at approximately 22 degreesC and longer cure, 180 days at 85 degreesC, following which they were characterised by XRD, FT-IR and solid-state Si-29 NMR. Ageing at longer times and higher temperatures somewhat improves the local ordering. The nature of the partially ordered structures is related to those of M-S-H mineral phases. The structures and compositions of M-S-H gels differ from those of C-S-H gels and partly on that account, C-S-H gels contain little magnesium while M-S-H gels in blended cements coexist with C-S-H but contain little calcium. (C) 2004 Elsevier Ltd. All rights reserved.

Original language	English
Pages (from-to)	85-98
Number of pages	14
Journal	Cement and Concrete Research
Volume	35
DOIs	https://doi.org/10.1016/j.cemconres.2004.06.022
Publication status	Published - 2005

Keywords

MgO-SiO2-H2O gels
MgO-SiO2-H2O minerals
Si-29 NMR
FT-IR
gel structures
PORTLAND-CEMENT PASTE
SULFATE ATTACK
SPECTROSCOPY
MINERALS

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10.1016/j.cemconres.2004.06.022

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title = "Synthesis and characterisation of magnesium silicate hydrate gels",

abstract = "Magnesium silicate hydrate gels (M-S-H) have been prepared by precipitation. The range of gel compositions lie between Mg/Si molar ratios 0.67-1.0. The gels were subject to short cure, approximately 24 h at approximately 22 degreesC and longer cure, 180 days at 85 degreesC, following which they were characterised by XRD, FT-IR and solid-state Si-29 NMR. Ageing at longer times and higher temperatures somewhat improves the local ordering. The nature of the partially ordered structures is related to those of M-S-H mineral phases. The structures and compositions of M-S-H gels differ from those of C-S-H gels and partly on that account, C-S-H gels contain little magnesium while M-S-H gels in blended cements coexist with C-S-H but contain little calcium. (C) 2004 Elsevier Ltd. All rights reserved.",

keywords = "MgO-SiO2-H2O gels, MgO-SiO2-H2O minerals, Si-29 NMR, FT-IR, gel structures, PORTLAND-CEMENT PASTE, SULFATE ATTACK, SPECTROSCOPY, MINERALS",

author = "Brew, {D R M} and Glasser, {F P}",

year = "2005",

doi = "10.1016/j.cemconres.2004.06.022",

language = "English",

volume = "35",

pages = "85--98",

journal = "Cement and Concrete Research",

issn = "0008-8846",

publisher = "PERGAMON-ELSEVIER SCIENCE LTD",

}

TY - JOUR

T1 - Synthesis and characterisation of magnesium silicate hydrate gels

AU - Brew, D R M

AU - Glasser, F P

PY - 2005

Y1 - 2005

N2 - Magnesium silicate hydrate gels (M-S-H) have been prepared by precipitation. The range of gel compositions lie between Mg/Si molar ratios 0.67-1.0. The gels were subject to short cure, approximately 24 h at approximately 22 degreesC and longer cure, 180 days at 85 degreesC, following which they were characterised by XRD, FT-IR and solid-state Si-29 NMR. Ageing at longer times and higher temperatures somewhat improves the local ordering. The nature of the partially ordered structures is related to those of M-S-H mineral phases. The structures and compositions of M-S-H gels differ from those of C-S-H gels and partly on that account, C-S-H gels contain little magnesium while M-S-H gels in blended cements coexist with C-S-H but contain little calcium. (C) 2004 Elsevier Ltd. All rights reserved.

AB - Magnesium silicate hydrate gels (M-S-H) have been prepared by precipitation. The range of gel compositions lie between Mg/Si molar ratios 0.67-1.0. The gels were subject to short cure, approximately 24 h at approximately 22 degreesC and longer cure, 180 days at 85 degreesC, following which they were characterised by XRD, FT-IR and solid-state Si-29 NMR. Ageing at longer times and higher temperatures somewhat improves the local ordering. The nature of the partially ordered structures is related to those of M-S-H mineral phases. The structures and compositions of M-S-H gels differ from those of C-S-H gels and partly on that account, C-S-H gels contain little magnesium while M-S-H gels in blended cements coexist with C-S-H but contain little calcium. (C) 2004 Elsevier Ltd. All rights reserved.

KW - MgO-SiO2-H2O gels

KW - MgO-SiO2-H2O minerals

KW - Si-29 NMR

KW - FT-IR

KW - gel structures

KW - PORTLAND-CEMENT PASTE

KW - SULFATE ATTACK

KW - SPECTROSCOPY

KW - MINERALS

U2 - 10.1016/j.cemconres.2004.06.022

DO - 10.1016/j.cemconres.2004.06.022

M3 - Article

SN - 0008-8846

VL - 35

SP - 85

EP - 98

JO - Cement and Concrete Research

JF - Cement and Concrete Research

ER -

Synthesis and characterisation of magnesium silicate hydrate gels

Abstract

Keywords

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