Banca de DEFESA: Mateus Ribeiro Caetano

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : Mateus Ribeiro Caetano
DATE: 29/02/2024
TIME: 14:00
LOCAL: Online
TITLE:

"STUDY OF THE MECHANICAL BEHAVIOR OF TROPICAL SOILS AND CRUSHED MATERIALS FROM ROAD PAVEMENTS IN THE FEDERAL DISTRICT AND THE STATE OF RORAIMA"

KEY WORDS:

Tropical Soils, Graduated Crushed Stone, Pavement Mechanics, Resilience Modulus, Permanent Deformation.

PAGES: 263
BIG AREA: Engenharias
AREA: Engenharia Civil
SUBÁREA: Geotécnica
SUMMARY:

The vast territorial expanse of Brazil imposes the need for an equally extensive road network. A crucial aspect in designing and sizing pavements is related to regional factors, which encompass specific conditions of geology, climate, and terrain. These elements result in weathering processes capable of generating soils with distinct characteristics. Despite differences in weathering processes in the northern regions, with a humid tropical climate, and in the central region of Brazil, with a semi-humid tropical climate, both exhibit tropical soils, some with lateritic behavior and others not, due to the occurrence of various processes of formation and alteration of these soils. Soils, influenced by variables such as mineralogy, particle size distribution, and the degree of associated weathering, exhibit diverse mechanical behavior. On the other hand, crushed materials, with a relatively stable mineralogical composition, are strongly influenced by particle size distribution and the shape index. These considerations raise questions about the most appropriate approaches for flexible road pavement structures, as these pavements are intrinsically linked to stiffness interactions between layers with different properties. For a better understanding of the aspects associated with the soils of the Federal District (DF) and the state of Roraima (RR), and graded aggregates of the DF, this research proceeded with the analysis of different materials, aiming at micro and macrostructural characterization, as well as the mechanistic behavior of these materials. It was noted through the results that classifications and characterizations provided information that explains the different mechanical behaviors of soils and graded aggregates. Thus, not only the state of stress, but also the origin and formation of materials affect deformability behavior. In this way, the importance of a decentralized view of purely mechanical tests was highlighted, also seeking information on the genesis of materials.

COMMITTEE MEMBERS:
Externo à Instituição - ANTÔNIO CARLOS RODRIGUES GUIMARÃES - IME
Interno - 3138091 - LEANDRO LIMA RASMUSSEN
Interno - 404227 - MARCIO MUNIZ DE FARIAS
Presidente - 3132829 - RAFAEL CERQUEIRA SILVA