Concrete Bonding Properties of Polyvinyl-Alcohol Fibre in Fabricated Structures

• Main Authors: Erxia Du, Shuanglong Dong, Jianheng Sun
• Format: Article
• Language: English
• Published: AIDIC Servizi S.r.l. 2018-07-01
• Series: Chemical Engineering Transactions
• Online Access: https://www.cetjournal.it/index.php/cet/article/view/2835

This paper aims to identify the bonding performance of superposed member of ordinary concrete and polyvinyl-alcohol (PVA) fibre-reinforced concrete, and that between rebar and PVA fibre-reinforced concrete. To this end, tensile tests were performed on specimens of six different contact surfaces between PVA fibre- reinforced concrete and ordinary concrete. The results show that PVA fibre-reinforced concrete has a much greater bonding performance than the ordinary concrete, which increases with the roughness of the contact surface. Moreover, PVA fibre-reinforced concrete of two different rebar diameters were designed for pull-out tests. The bonding performance between the concrete and rebar was contrasted with that between ordinary concrete and rebar. In this way, the author determined the failure mechanism of the bonding between PVA fibre-reinforced concrete and rebar, and derived the constitutive relationship between bonding stress and slip. The research findings lay the basis for the application of PVA fibre-reinforced concrete in fabricated structures.