Constitutive Formulations for Concrete with Recycled Aggregates

CAGGIANO, ANTONIO; ETSE, GUILLERMO J.; FOLINO, PAULA CECILIA; RIPANI, MARIANELA; VRECH, SONIA M.

Recent Advances on Green Concrete for Structural Purposes The Contribution of the EU-FP7 Project EnCoRe

Springer Nature, Springer Internaitonal Publishing

Lugar: Cham; Año: 2017; p. 3 - 427

In this Chapter, a thermodynamically consistent gradient model is proposedfor natural aggregate concrete and then, modified to take into account theaddition of different contents of recycled aggregates and its influence on concrete mechanical response. A particular and simple form of gradient-based plasticity is considered, where the state variables are the only ones of non-local character. After describing the material formulation for natural and recycled aggregate concretes, the model calibration is performed with experimental data taken from literature. A comprehensive numerical analysis is presented, where the effects of the recycled aggregate content on the performance of concrete in pre and post-peak behavior are evaluated and discussed, for different stress states. Finally, the ability of the model to capture the variation of mechanical response of concrete with different recycled aggregate contents is demonstrated for different mechanical tests.