Effect of short, dispersed glass and carbon fibres on the behaviour of textile-reinforced concrete under tensile loading

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Abstract

This paper addresses the influence of the addition of short, dispersed fibres made of alkali-resistant (AR) glass and carbon on the fracture behaviour of textile-reinforced concrete (TRC). A series of uniaxial, deformation-controlled tension tests was performed to study the strength, deformation, and fracture behaviour of thin, narrow plates made of TRC with and without the addition of short fibres. Furthermore, multifilament-yarn pullout and single-fibre pullout tests were carried out to gain a better understanding of the crack-bridging behaviour which suppresses growth and widening of cracks. Pronounced enhancement of first-crack stress was achieved, the value increased by factors of 1.5 and 2 due to the addition of glass and carbon fibres, respectively. While more and finer cracks were observed on the specimens with short fibres added, a moderate improvement in tensile strength was recorded. Water-to-binder ratio influences the matrix-fibre bond quality and thus fibre failure mode. While fibre fracture dominated behaviour when matrix M030 (low water-to-binder ratio of 0.30) was used, pronounced pullout behaviour was observed for fibres embedded in the matrix with a higher w/b ratio (M045). Furthermore, it was found that short fibres can also improve the bond between multifilament-yarns and the surrounding matrix by means of new cross-links.

Details

Original languageEnglish
Pages (from-to)56-71
Number of pages16
JournalEngineering Fracture Mechanics
Volume92
Publication statusPublished - 2012
Peer-reviewedYes

External IDs

Scopus 84864312264

Keywords

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Keywords

  • Textile-reinforced concrete, short dispersed fibre, tensile behaviour, pullout test

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