Materials and Structures

, Volume 26, Issue 7, pp 433–440 | Cite as

Slipforming with fibre-reinforced concrete for efficient crack control

  • P. S. Mangat
  • G. S. Manarakis
Technical Notes

Abstract

The paper presents the results of slipforming field trials carried out to investigate the potential of polypropylene fibre reinforced concrete in reducing the need for anti-cracking conventional reinforcement in slipform construction. Three trials are reported in which polypropylene fibre reinforced concrete of different strengths ranging between 43 and 54 N mm−2 was used to replace conventional reinforcement in normal concretes. In addition steel fibre (melt-extract) reinforced concrete of strength 60 N mm−2 was also used in one of the trials. In order to achieve optimum mix design, use was made of pulverized fuel ash, silica fume and admixtures such as superplasticizer, retarder and air entrainer as required. The results of the field trials confirm the promising potential of fibre-reinforced concrete in eliminating the need for conventional anti-cracking reinforcement in slipform construction.

Resume

Cet article présente les résultats d’une expérimentationin situ de procédé de coffrage glissant afin d’évaluer l’intérêt potentiel du béton renforcé de fibres en vue de réduire la nécessité du treillis anti-fissure utilisé dans ce type de construction. On rend compte de trois essais pour lesquels on a utilisé du béton renforcé de fibres de polypropylène de résistances différentes variant entre 43 et 54 N mm−2 pour remplacer l’armature conventionnelle dans les bétons ordinaires. On a aussi utilisé, dans l’un des essais, du béton renforcé de fibres métalliques d’une résistance de 60 N mm−2. Pour obtenir une composition optimale, on a ajouté des cendres volantes, des fumées de silice et des adjuvants tels que superplastifiant, retardateur de prise et entraîneur d’air.

Les résultats des essaisin situ confirment l’aptitude prometteuse du béton renforcé de fibres à éliminer le besoin de treillis anti-fissure dans la construction avec coffrage glissant.

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Copyright information

© RILEM 1993

Authors and Affiliations

  • P. S. Mangat
    • 1
  • G. S. Manarakis
    • 1
  1. 1.School of ConstructionSheffield Hallam UniversitySheffieldUK

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