Mechanical Behavior of Basaltic Rocks from Serra Geral Formation Used as Road Material in Santa Catarina State, Brazil
A.C.R. Guimarães, L.M.G. Motta, M.L.A. Arêdes
Soils and Rocks, São Paulo, 39(2): 203-210, May-August, 2016 | PDF
This work presents physical, petrographic and mechanical characteristics of basalt aggregates from Serra Geral Formation in the State of Santa Catarina, Brazil, used as layers of simple graded crushed stone in pavement. The simple graded crushed stone chosen for the study was obtained from a quarry in the municipality of São José do Cerrito/SC, located in the mountainous region of Santa Catarina. The aggregates of this quarry were used to pave a segment of highwayBR-282/SC from 2002 to 2006. This study presents the results of thin section analysis, which identifies the mineralogical composition of the material and clarifies aspects associated with the rock texture. In addition, resilient modulus tests are conducted, followed by numerical evaluation of the pavement’s structural behavior, field evaluation of elastic displacement with Benkelman beam testing, and comparison of the results. The entire highway segment was monitored throughout its implementation and was determined to be in good condition. The material used offers good performance as a pavement layer. Moreover, the methodology used for the design presents good correlation with the field tests.
Submitted on April 18, 2015; Final Acceptance on June , 2016; Discussion open until December 30, 2016.