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Hybrid polyethylene/polypropylene blended fiber-reinforced cement composite

Silva, E.R. / Coelho, J.F.J. / Bordado, J.C.

This article reports the results of a study related to the reinforcement of mortar-based composites with newly developed polyethylene/polypropylene blended fibers. The study showed the hybrid fibers to have a mechanical/reinforcing effect in the cement-based matrix. Mechanical strengths improvements, as high as 40%, were obtained for composites with a fiber length of 24 mm and a fiber volume fraction of 2.9%. The mechanical enhancement was associated with a strong mechanical interlocking between the fibers/cement matrix interfaces promoted by the fibers' surface ridges and fibrillation ability. Macro/microstructure and morphological observations showed a post-cracking ductility improvement of composites by the hybrid (bridge effect) fibers, also evidenced a multi-cracking mechanism.

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Hybrid polyethylene/polypropylene blended fiber-reinforced cement composite

Silva, E.R. / Coelho, J.F.J. / Bordado, J.C.

This article reports the results of a study related to the reinforcement of mortar-based composites with newly developed polyethylene/polypropylene blended fibers. The study showed the hybrid fibers to have a mechanical/reinforcing effect in the cement-based matrix. Mechanical strengths improvements, as high as 40%, were obtained for composites with a fiber length of 24 mm and a fiber volume fraction of 2.9%. The mechanical enhancement was associated with a strong mechanical interlocking between the fibers/cement matrix interfaces promoted by the fibers' surface ridges and fibrillation ability. Macro/microstructure and morphological observations showed a post-cracking ductility improvement of composites by the hybrid (bridge effect) fibers, also evidenced a multi-cracking mechanism.

Hybrid polyethylene/polypropylene blended fiber-reinforced cement composite

Silva, E.R. / Coelho, J.F.J. / Bordado, J.C.

This article reports the results of a study related to the reinforcement of mortar-based composites with newly developed polyethylene/polypropylene blended fibers. The study showed the hybrid fibers to have a mechanical/reinforcing effect in the cement-based matrix. Mechanical strengths improvements, as high as 40%, were obtained for composites with a fiber length of 24 mm and a fiber volume fraction of 2.9%. The mechanical enhancement was associated with a strong mechanical interlocking between the fibers/cement matrix interfaces promoted by the fibers' surface ridges and fibrillation ability. Macro/microstructure and morphological observations showed a post-cracking ductility improvement of composites by the hybrid (bridge effect) fibers, also evidenced a multi-cracking mechanism.

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Title:

Hybrid polyethylene/polypropylene blended fiber-reinforced cement composite

Contributors:

Silva, E.R. (author) / Coelho, J.F.J. (author) / Bordado, J.C. (author)

Published in:

Journal of Composite Materials ; 47 ; 3131-3141

Publication date:

2013

Size:

11 Seiten

ISSN:

DOI:

https://doi.org/10.1177/0021998312462619

Type of media:

Article (Journal)

Type of material:

Print

Language:

English

Keywords:

Mörtel , Polyethylen , Polypropylenfaser , Faserlänge , Grenzflächenadhäsion , Verbundfaser , Festigkeit , Volumenfraktion , Fibrillierung , Mikrostruktur , Rissbildung , Zähfestigkeit , Versagensmechanismus , Zement

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