Evaluación de la relación entre los contenidos de pasta y de vacíos de mezclas de hormigón permeable empleando gradaciones de agregados que cumplan la ASTM C33

Abstract

Permeable concrete has a high void content unlike conventional concrete. It allows to drain the water through its interconnected pores, to the soil in a natural way, reducing the accumulation of water on the surface. This project will be based on ACI 522R-11, chapter 6, permeable concrete design. This standard is intended for the size N°8 of thick aggregates and consists of a graph of: Empty Content, % Volume vs Paste Content and % Volume (theoretical values). The objective shall be to obtain the ratio between the % of real voids and the % of real pulp of the following gradations N°7, N°6, N°57 and N°56, in which the content of voids and pulp will have variability. In order to obtain real data by using optimal densities and real densities. The four gradations were tested at 28 days to compression, indirect traction, permeability, the results were 6.35 MPa to compression, indirect traction of 0.88 MPa and permeability of 19.86 mm/s. It was observed that resistance increases and decreases depending on aggregate size, complying with ASTM C33.