UNSPECIFIED (2000) Microstructural observations in new matrix glass fibre reinforced cement. CEMENT AND CONCRETE RESEARCH, 30 (11). pp. 1747-1753. ISSN 0008-8846

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Abstract

Glass fibre reinforced cement (GRC) durability is generally thought to be governed by weakening of the reinforcement by the alkaline matrix and/or precipitation of hydration products, particularly calcium hydroxide (CH), within and around the strands. Previous microstructural investigations of GRC have exclusively used scanning electron microscopy (SEM). This paper is concerned with the application of thin-section petrography (TSP) to GRC. TSP allows identification of CH and other phases associated with the strands and unlike SEM, sample preparation causes minimal interfacial disturbance. Three matrices were studied; OPC, OPC plus metakaolin and OPC plus calcium sulphoaluminate cement. It was found that the degree of composite degradation was unrelated to the amount of CH or other hydration products precipitated within the strands or at the interface. No significant loss of fibre section was observed in degraded composites. It is postulated that gradual enlargement of pre-existing fibre flaws causes strength loss in GRC. (C) 2000 Elsevier Science Ltd. All rights reserved.

Item Type:	Journal Article
Subjects:	T Technology > TH Building construction T Technology > TA Engineering (General). Civil engineering (General)
Journal or Publication Title:	CEMENT AND CONCRETE RESEARCH
Publisher:	PERGAMON-ELSEVIER SCIENCE LTD
ISSN:	0008-8846
Date:	November 2000
Volume:	30
Number:	11
Number of Pages:	7
Page Range:	pp. 1747-1753
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/12619

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