The Behavior of Recycled Concrete through the Application of an Isotropic Damage Model

Abstract

The main goal of this paper is to describe the mechanical behavior of the CDW recycled concrete in compression, using an isotropic damage model adapted to the variation of the replacement rate of natural aggregates by recycled ones. The isotropic model by Mazars was used as a constitutive equation for the CDW concrete and its adjustment parameters, A and B, were written as quadratic polynomials according to the aggregates replacement rate. The model was evaluated for conventional and recycled concretes. For the latter ones, the aggregates replacement ratios evaluated were 50% and 100%. The results show good approximation between the analytical and numerical values obtained with the adapted isotropic damage model and experimental concrete results for both compressive and flexural strength.

Compressive study on recycled concrete: experiment and numerical homogenization modelling

“…These factors significantly influence the mechanical properties of RC. To understand the compressive behavior of RC as a fundamental characterization, various theoretical and numerical models have been developed, including empirical models, fracture mechanics approaches, and continuum damage mechanics [7,9] . These macroscopic models cannot clarify the link between the overall multiscale behavior of RC and its heterogeneities related to its constituent phases such as RA, NA, and pores.…”