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Restrained shrinkage cracking in fiber reinforced concrete: A novel test technique

Banthia, N. / Yan, C. / Mindess, S.

A novel experimental technique was developed to assess the cracking potential of cement-based materials when used as bonded overlay. Specimens were cast directly on to a substrate and the assembly was subjected to a drying environment to induce cracking. Lengths and widths of the resulting cracks in the overlay were monitored as a function of time. The use of fibres was found to be very effective not only in reducing the widths of the shrinkage cracks but also in allowing multiple cracking to occur. Interestingly, these two phenomena occured only up to a fiber volume fraction of 0.5 %; at 1 % by volume of fibres, only minimal cracking was seen to occur even under a particularly severe environment.

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Restrained shrinkage cracking in fiber reinforced concrete: A novel test technique

Banthia, N. / Yan, C. / Mindess, S.

A novel experimental technique was developed to assess the cracking potential of cement-based materials when used as bonded overlay. Specimens were cast directly on to a substrate and the assembly was subjected to a drying environment to induce cracking. Lengths and widths of the resulting cracks in the overlay were monitored as a function of time. The use of fibres was found to be very effective not only in reducing the widths of the shrinkage cracks but also in allowing multiple cracking to occur. Interestingly, these two phenomena occured only up to a fiber volume fraction of 0.5 %; at 1 % by volume of fibres, only minimal cracking was seen to occur even under a particularly severe environment.

Restrained shrinkage cracking in fiber reinforced concrete: A novel test technique

Banthia, N. / Yan, C. / Mindess, S.

A novel experimental technique was developed to assess the cracking potential of cement-based materials when used as bonded overlay. Specimens were cast directly on to a substrate and the assembly was subjected to a drying environment to induce cracking. Lengths and widths of the resulting cracks in the overlay were monitored as a function of time. The use of fibres was found to be very effective not only in reducing the widths of the shrinkage cracks but also in allowing multiple cracking to occur. Interestingly, these two phenomena occured only up to a fiber volume fraction of 0.5 %; at 1 % by volume of fibres, only minimal cracking was seen to occur even under a particularly severe environment.

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Title:

Restrained shrinkage cracking in fiber reinforced concrete: A novel test technique

Additional title:

Behinderung der Schwindungsrißbildung in faserverstärktem Beton: ein neues Untersuchungsverfahren

Contributors:

Banthia, N. (author) / Yan, C. (author) / Mindess, S. (author)

Published in:

Cement and Concrete Research ; 26 ; 9-14

Publication date:

1996

Size:

6 Seiten, 4 Bilder, 2 Tabellen, 4 Quellen

ISSN:

DOI:

https://doi.org/10.1016/0008-8846(95)00186-7

Type of media:

Article (Journal)

Type of material:

Print

Language:

English

Keywords:

faserverstärktes Erzeugnis , Asbestzement , mechanische Verstärkung , Riss , Rissbildung , Trocknen , Messmethode , mechanische Beanspruchung , Metallfaser , Beton , Trocknungsfehler , Schwindung , Trockenschwindung , Substrat

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