Desarrollo de nueva metodología para la estimación de propiedades mecánicas de eco-hormigones, mediante ensayos no destructivos en función de la temperatura

Abstract

The use of biomass ashes as an additive to cement or the utilization of fine and coarse recycled aggregate for concrete as a partial substitution of natural aggregate in concrete fabrication, constitute two examples of waste recovery, as the wastes eventually become by-products. This reduces the environmental impact of concrete fabrication. With the goal of contributing to the advancement of standards toward more sustainable protocols, this Thesis studies the influence of these eco-materials on the evolution of the mechanical properties of concrete and on the correlations with the results of non-destructive tests, as a function of the curing temperature. It is observed that curing temperature has an impact on the effect of these eco-materials on the evolution of the mechanical properties and also affects their correlations with non-destructive tests, especially at early ages. Estimation models of the compressive strength are proposed by combining non-destructive tests. The proposed models achieve better results that those usually utilized. Finally, a new procedure for the improvement of quality control is proposed. This may lead to significant advantages both on the short- and the long-term time scales.