Tensile response of textile reinforced concrete incorporating synthetic fibres

Abstract

Textile Reinforced Concrete (TRC) is a composite material where a textile fabric (typically in carbon) is embedded within a cementitious matrix. This material has emerged as a promising alternative to conventional reinforced concrete, allowing for the construction of light and durable structures with a limited impact in terms of CO2-eq footprint. The response of TRC in tension is, however, characterized by a brittle response, limiting its potential to redistribute internal forces and Peñalizing the overall structural performance. To enhance the behaviour of TRC, this research explores its combination with synthetic (polyolefin) fibres. The aim is to investigate the potential benefits in terms of cracking, control of delamination (namely in overlap regions of the fabric), and enhancement of the postpeak toughness. The paper presents a comprehensive experimental programme aimed at characterizing the material response of its components, the bond between the fabrics and the matrix, as well as the composite behaviour of TRC. The experimental results are interpreted and related to various physical parameters, such as the level of undulation of the fabric or the amount of fibres used. On that basis, a simple approach for design is proposed, accounting for the potential delamination of tension ties, as well as several practical conclusions.