The magnesia-silica gel phase in slag cements: alkali (K, Cs) sorption potential of synthetic gels

D M R  Brew; F P  Glasser

doi:10.1016/j.cemconres.2004.03.016

The magnesia-silica gel phase in slag cements: alkali (K, Cs) sorption potential of synthetic gels

D M R Brew, F P Glasser

Chemistry

Research output: Contribution to journal › Article

47 Citations (Scopus)

Abstract

Blends of Portland cement with blast furnace slag hydrate to yield two gel phases, one essentially a calcium silicate hydrate (C-S-H) composition, the other a magnesium silicate hydrate (M-S-H) composition: the two gel phases are essentially immiscible. Together, the gel phases comprise an important source of sorption potential for the alkalis present in ordinary cement and blending agents. M-S-H gels have been synthesised and their sorption potential measured for postassium (K) and cesium (Cs) at 25 degreesC by using fresh gels as well as gels previously aged at 85 degreesC for 6 months. The ability of slag-cement blends to lower pore fluid alkalinity generally, and in nuclear waste technology to incorporate Cs, is interpreted in terms of the sorption data. (C) 2004 Elsevier Ltd. All rights reserved.

Original language	English
Pages (from-to)	77-83
Number of pages	7
Journal	Cement and Concrete Research
Volume	35
DOIs	https://doi.org/10.1016/j.cemconres.2004.03.016
Publication status	Published - 2005

Keywords

M-S-H gel
alkali sorption
pore fluids
Cs
cement paste
S-H GELS

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10.1016/j.cemconres.2004.03.016

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title = "The magnesia-silica gel phase in slag cements: alkali (K, Cs) sorption potential of synthetic gels",

abstract = "Blends of Portland cement with blast furnace slag hydrate to yield two gel phases, one essentially a calcium silicate hydrate (C-S-H) composition, the other a magnesium silicate hydrate (M-S-H) composition: the two gel phases are essentially immiscible. Together, the gel phases comprise an important source of sorption potential for the alkalis present in ordinary cement and blending agents. M-S-H gels have been synthesised and their sorption potential measured for postassium (K) and cesium (Cs) at 25 degreesC by using fresh gels as well as gels previously aged at 85 degreesC for 6 months. The ability of slag-cement blends to lower pore fluid alkalinity generally, and in nuclear waste technology to incorporate Cs, is interpreted in terms of the sorption data. (C) 2004 Elsevier Ltd. All rights reserved.",

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year = "2005",

doi = "10.1016/j.cemconres.2004.03.016",

language = "English",

volume = "35",

pages = "77--83",

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issn = "0008-8846",

publisher = "PERGAMON-ELSEVIER SCIENCE LTD",

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TY - JOUR

T1 - The magnesia-silica gel phase in slag cements: alkali (K, Cs) sorption potential of synthetic gels

AU - Brew, D M R

AU - Glasser, F P

PY - 2005

Y1 - 2005

N2 - Blends of Portland cement with blast furnace slag hydrate to yield two gel phases, one essentially a calcium silicate hydrate (C-S-H) composition, the other a magnesium silicate hydrate (M-S-H) composition: the two gel phases are essentially immiscible. Together, the gel phases comprise an important source of sorption potential for the alkalis present in ordinary cement and blending agents. M-S-H gels have been synthesised and their sorption potential measured for postassium (K) and cesium (Cs) at 25 degreesC by using fresh gels as well as gels previously aged at 85 degreesC for 6 months. The ability of slag-cement blends to lower pore fluid alkalinity generally, and in nuclear waste technology to incorporate Cs, is interpreted in terms of the sorption data. (C) 2004 Elsevier Ltd. All rights reserved.

AB - Blends of Portland cement with blast furnace slag hydrate to yield two gel phases, one essentially a calcium silicate hydrate (C-S-H) composition, the other a magnesium silicate hydrate (M-S-H) composition: the two gel phases are essentially immiscible. Together, the gel phases comprise an important source of sorption potential for the alkalis present in ordinary cement and blending agents. M-S-H gels have been synthesised and their sorption potential measured for postassium (K) and cesium (Cs) at 25 degreesC by using fresh gels as well as gels previously aged at 85 degreesC for 6 months. The ability of slag-cement blends to lower pore fluid alkalinity generally, and in nuclear waste technology to incorporate Cs, is interpreted in terms of the sorption data. (C) 2004 Elsevier Ltd. All rights reserved.

KW - M-S-H gel

KW - alkali sorption

KW - pore fluids

KW - Cs

KW - cement paste

KW - S-H GELS

U2 - 10.1016/j.cemconres.2004.03.016

DO - 10.1016/j.cemconres.2004.03.016

M3 - Article

SN - 0008-8846

VL - 35

SP - 77

EP - 83

JO - Cement and Concrete Research

JF - Cement and Concrete Research

ER -

The magnesia-silica gel phase in slag cements: alkali (K, Cs) sorption potential of synthetic gels

Abstract

Keywords

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