Effect of steel fibres extracted from recycled tyres on plastic shrinkage cracking in self-compacting concrete. Issue 24 (21st December 2021)

• Record Type: Journal Article
• Authors: Sayahi, Faez; Emborg, Mats; Hedlund, Hans; Cwirzen, Andrzej
• Is Part Of: Magazine of concrete research. Volume 73:Issue 24(2021)
• Page Start: 1270
• Page End: 1282
• Publication Date: 2021-12-21
• Subjects: cracks & cracking -- fibre-reinforced concrete -- shrinkage; Concrete -- Periodicals; Concrete construction -- Periodicals; Concrete -- Testing -- Periodicals; 624.1834
• DOI: 10.1680/jmacr.20.00116
• Languages: English
• ISSNs: 0024-9831

Abstract

Abstract : This paper investigates and compares the effect of steel fibres obtained through recycling waste tyres (known as RTSF), and a commercially available hooked steel fibre (HSF), on plastic shrinkage cracking in self-compacting concrete. The volumetric deformations of the specimens, bleeding, and the mass loss have been quantified. Mixtures containing 2.5, 5, 7.5 and 10 kg/m 3 of RTSF, and 5 and 7.5 kg/m 3 of HSF have been tested. The results show that an almost similar reduction of the crack area can be attained if HSF is replaced by a slightly higher amount of RTSF. However, the former seems to be more effective in restraining plastic shrinkage. Both fibres decreased the volumetric shrinkage and the bleeding capacity of the specimens.