A REPAIRED APPLICATION OF POLYPROPYLENE FIBRE REINFORCED SPRAYED CONCRETE. 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

This paper describes the recent repair of Budbrooke water tower, a Victorian brick structure located in Warwickshire, with sprayed concrete containing polypropylene fibre reinforcement. Severn Trent Water, the owners of the tower, instigated the project because of their concern over spalling of the brickwork structure. The repair consisted of a 35 mm layer of polypropylene fibre reinforced concrete (fibres at 0.5% by weight) with a non-fibrous flash coat to finish. The specification and contract documentation were written to incorporate a research and development programme to evaluate this relatively new material in both the short and long term. On the western face of the structure five trial areas were sprayed; four of these were different fibre reinforced mixes and one was mesh reinforced. In-situ fibre contents were determined from wet analysis of fresh concrete removed from the structure and from test panels. Fibre losses were found to be in the range 35-40%, similar to the material losses; in-situ fibre contents were consequently close to the dry mix contents. Flexural strength and toughness index data was obtained from beams cut from test panels. This paper concludes with a discussion of the findings of a six month inspection which showed that the repair has generally performed satisfactorily to date.(A) For the covering abstract of the conference see IRRD 827953.

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  • Corporate Authors:

    Elsevier Science Publishers

    Crown House, Linton Road
    Barking, Essex IG11 8JU,   England 
  • Authors:
    • Austin, S
    • Robins, P
  • Publication Date: 1989

Language

  • English

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Filing Info

  • Accession Number: 00604673
  • 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