Super-critical carbonation of glass-fibre reinforced cement. Part 1: mechanical testing and chemical analysis

The deterioration of glass-fibre reinforced cement (GRC) arises (to a substantial extent) from the alkalinity and calcium hydroxide content of the matrix. Carbonation of the matrix significantly lowers both factors but, under normal circumstances, the reaction proceeds too slowly to be of practical...

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Bibliographic Details
Published in:Composites. Part A, Applied science and manufacturing Applied science and manufacturing, 2001-12, Vol.32 (12), p.1777-1787
Main Authors: PURNELL, P, SHORT, N. R, PAGE, C. L
Format: Article
Language:English
Subjects:
Applied sciences
Buildings. Public works
Cement concrete constituents
Cements
Ceramic. Refractories. Terra cotta
Exact sciences and technology
Materials
Properties and test methods
Properties of anhydrous and hydrated cement, test methods
Recovery materials
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Summary:The deterioration of glass-fibre reinforced cement (GRC) arises (to a substantial extent) from the alkalinity and calcium hydroxide content of the matrix. Carbonation of the matrix significantly lowers both factors but, under normal circumstances, the reaction proceeds too slowly to be of practical use in improving durability. The efficacy of such treatment is dependent on the moisture content of the samples prior to treatment. GRC samples thus treated are mechanically tested before and after a period of accelerated ageing. The supercritical carbonation treatment significantly increases the design strength and toughness of the GRC and greatly increases the fibre-matrix bond. Retention of toughness and degree of carbonation are both correlated with pretreatment moisture content, while initial property enhancements are not. (Original abstract - amended)
ISSN:1359-835X
1878-5840
DOI:10.1016/S1359-835X(01)00019-7