FRACTURE AND CRACK GROWTH IN GLASS FIBRE REINFORCED MOTAR. FIBRE REINFORCED CEMENTS AND CONCRETES: RECENT DEVELOPMENTS. PROCEEDINGS OF AN INTERNATIONAL CONFERENCE HELD AT THE UNIVERSITY OF WALES, COLLEGE OF CARDIFF, SCHOOL OF ENGINEERING, UNITED KINGDOM, SEPTEMBER 18-20, 1989

The paper describes both fracture and crack growth data obtained for a system consisting of Portland cement, fine sand and ground mica, reinforced with a random two dimensional array of alkali resistant glass fibre which remain in bundles of around fifty filaments. The glass fibre content was varied from 0-3.7 vol %. Cracks were introduced into a specimens in notched three point bend tests and crack growth studied as a function of applied force at a fixed displacement rate. An attempt was made to measure an 'apparent fracture toughness' using measured specimen compliance as a function of crack length. The difficulties of determining a geometry and crack length independent toughness parameter are illustrated using a number of existing analyses. The crack profile, as a function of fibre content and crack length was studied using polished sections of the three point bend specimens, optical examination of the surface cracks and Scanning electron microscope (SEM) examination of the facture surfaces. The overall fracture pattern is seen to change with increasing crack length and with increasing fibre volume fraction. The implications of the results are discussed in terms of the role of the fibres, assessment of materials properties and fracture mechanics type descriptions of the fracture process.(A) For the covering abstract of the conference see IRRD 827953.

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  Elsevier Science Publishers

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• Authors:
  • Bushby, A J
  • Davies, CKL
• Publication Date: 1989

Language

• English

Media Info

• Pagination: p. 111-120
• Serial:
  • Publication of: Elsevier Applied Science Publishers Limited
  • Publisher: Elsevier Science Publishers

Subject/Index Terms

• TRT Terms: Cement; Conferences; Cracking; Failure; Fibers; Glass; Material reinforcement; Mica; Properties of materials; Reinforcing materials; Sand; Strength of materials; Surfaces
• Subject Areas: Data and Information Technology; Materials;

Filing Info

• Accession Number: 00604682
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• ISBN: 1-85166-415-7
• Files: ITRD, TRIS
• Created Date: Feb 28 1991 12:00AM