Estudo da permeabilidade da areia da Praia de Ipanema e de um arranjo de microesferas de vidro

Abstract

This work presents a study of Ipanema Beach Sand/RJ permeability, comparing it with the permeability of a glass microspheres arrangement. The study aims to verify the validity of the permeability equation, proposed by TAYLOR (1948). A permeameter was designed and built for this study, featuring characteristics not available in commercially models. The experimental program also included the study of the minimum and intermediate void ratio using the air pluviation method proposed by MIURA & TOKI (1982), and the maximum void ratio using the ASTM D4254-16 methods, as well as other methods developed in the Soil Rheology Laboratory at COPPE, tested by DOMINGOS (2022). It was observed that the void ratio from Ipanema Beach Sand ranged between 0.467 and 0.767. For the glass microspheres, the void ratio ranged from 0.441 to 0.653. For Ipanema Beach sand, the highest void ratio was obtained using the 13 juxtaposed cylinders method, while for the glass microspheres, the best results were obtained using 3 juxtaposed cylinders method. Permeability tests for Ipanema Beach Sand resulted in lower values than those of the glass microspheres, both ranging between 3 × 10^-2 cm/s and 10^-1 cm/s. Additionally, is highlighted the validity of the linear relationship between the permeability k and the expression e3⁄1+ e, where e is the void ratio of the specimen.