Contribuição ao entendimento do uso do Geogauge H4140 em camadas granulares de pavimento

Abstract

Despite the Brazilian roads situation has been improved over time, there are still perceptible shortcomings which can cause discomfort as well as accidents for the users. The reason for these problems on the Brazilian roads can be summarized by the lack of a mechanistic-empirical design method and a better compaction process quality control. The Brazilian design methods are still based on traditional CBR tests which does not reflect the real repeated moving load from the traffic. Considering the compaction process in the field, there are still traditional quality control tests based on density measures in situ such as the sand bottle. As the stiffness and resilient modulus are deformability parameters more variable and sensitives than density, the layer uniformity can be easily controlled and monitored during the compaction process besides they be key input parameters directly related to recent design methods. Thus, it becomes evident the need for faster, safer and more accurate devices so that it can be determined such parameters for the compaction quality control in the field. The main goal of this paper was to understand the use of a more current device well known as GeoGauge or Soil Stiffness Gauge (SSG) which provides the stiffness as well as the resilient modulus from a granular material in the field. It was observed a laboratory compaction of a granular soil by a manual roller into a sample-box developed for this research, aiming to collect and verify dada from the GeoGauge and the sand bottle during the compaction process evolution. It was verified that the Geogauge can be used as a soil situation verifier in terms of deformity