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Microstructural observations in new matrix glass fibre reinforced cement

Cement and concrete research, 2000, Vol.30 (11), p.1747-1753 [Peer Reviewed Journal]

2000 Elsevier Science Ltd ;2001 INIST-CNRS ;ISSN: 0008-8846 ;EISSN: 1873-3948 ;DOI: 10.1016/S0008-8846(00)00407-5 ;CODEN: CCNRAI

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Title:
Microstructural observations in new matrix glass fibre reinforced cement
Author: Purnell, P ; Short, N.R ; Page, C.L ; Majumdar, A.J
WCA
Subjects: Applied sciences ; Buildings. Public works ; Cement concrete constituents ; Cements ; Concretes. Mortars. Grouts ; Degradation ; Exact sciences and technology ; Fibre reinforced concrete (including asbestos cement) ; Fibre reinforcement ; Materials ; Microstructure ; Petrography ; Properties and test methods ; Properties of anhydrous and hydrated cement, test methods ; SEM
Is Part Of: Cement and concrete research, 2000, Vol.30 (11), p.1747-1753
Description: 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.
Publisher: New York, NY: Elsevier Ltd
Language: English
Identifier: ISSN: 0008-8846
EISSN: 1873-3948
DOI: 10.1016/S0008-8846(00)00407-5
CODEN: CCNRAI
Source: Alma/SFX Local Collection

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Microstructural observations in new matrix glass fibre reinforced cement

2000 Elsevier Science Ltd ;2001 INIST-CNRS ;ISSN: 0008-8846 ;EISSN: 1873-3948 ;DOI: 10.1016/S0008-8846(00)00407-5 ;CODEN: CCNRAI

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