Assessment of fibre content and orientation in SFRC with the inductive method. Part 2: Application for the quality control of sprayed concrete

Abstract

Concrete is the most used construction material in the world despite its fragility and low capacity to bear tensile stresses. Steel fibres may be added to increase the ductility of the material leading to fibre reinforced concrete (FRC) that is used in many applications, such as sprayed concrete. When concrete is sprayed, fibres are rebounded affecting negatively the mechanical behaviour of the FRC. To control the fibre content a new non-destructive method is presented: The inductive method. The present work compares it with the traditional one and proposes a methodology to control the fibre content of the sprayed fibre reinforced concrete (SFRC).