Hybrid Fibre-Reinforced Cement Composite

Elisabete R. Silva; Humberto E. Ferreira; Jorge F.J. Coelho; João C. Bordado

doi:10.4028/www.scientific.net/MSF.730-732.343

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HomeMaterials Science ForumMaterials Science Forum Vols. 730-732Hybrid Fibre-Reinforced Cement Composite

Hybrid Fibre-Reinforced Cement Composite

Abstract:

This paper reports the results of a series of experiments carried out to investigate the effectiveness of newly hybrid polyethylene/polypropylene (PP/PE) fibres inclusion in the mechanical performance of cement matrices, with regard to fibres properties and content. The results indicate that, compared with plain cement matrix, the PP/PE fibre-reinforced cement matrices (FRC) revealed improvements on their mechanical performance. Increases of 37 ± 1% on compressive (40.2 MPa) and flexural strengths (8.1 MPa) were obtained for 24 mm fibre length composites containing a rather low fibre’s content (1 wt.%). These mechanical improvements were achieved after optimisation of the mortar workability by the addition of a superplasticizer. FRC mechanical behaviours also evidenced that despite the compressive strengths increasing with fibre length, a flexural strength effect is only noticeable for a 24 mm length fibre-reinforced composite and for fibres volume higher than 2.9 %. Morphological observations showed a strong interaction between fibres and cement matrix, evidenced a crack arrest role (bridge effect) on fibre/cement interfacial zone and revealed a typical multiple fracture cracking mechanism.

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Periodical:

Materials Science Forum (Volumes 730-732)

Pages:

343-348

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.730-732.343

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Online since:

November 2012

Authors:

Elisabete R. Silva, Humberto E. Ferreira, Jorge F.J. Coelho, João C. Bordado

Keywords:

Cement Composite, Mechanical Property, PP/PE Fibre, Reinforcement

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