Banca de DEFESA: PHILLIPY JOHNY LINDOLFO DA SILVA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : PHILLIPY JOHNY LINDOLFO DA SILVA
DATE: 26/02/2025
TIME: 14:00
LOCAL: LINK - (https://meet.google.com/mum-xahg-nzo) - AMBIENTE VIRTUAL - MEET
TITLE:

ANALYSIS OF THE MECHANICAL BEHAVIOR OF LATERITIC SOIL MIXTURES WITH ASPHALT WASTE FOR USE IN PAVEMENT LAYERS

KEY WORDS:

Resilient Modulus. Permanent Deformation. Soil Stabilization. MeDiNa Method. Sustainability.

PAGES: 110
BIG AREA: Engenharias
AREA: Engenharia Civil
SUBÁREA: Geotécnica
SPECIALTY: Pavimentos
SUMMARY:

The analysis of the mechanical behavior of soils and alternative materials for pavements has been widely studied due to the need for sustainable and economically viable solutions in transportation engineering. This study investigates the feasibility of using Reclaimed Asphalt Pavement (RAP), a byproduct of asphalt concrete production, in the stabilization of lateritic granular soils from Rio Grande do Norte for application in base and sub-base layers of flexible pavements. The samples were classified according to the MCT (Miniature, Compacted, Tropical) system and the Universal Methodology for Lateritic Soil Classification. The mechanical characterization involved repeated load triaxial tests to determine the resilient modulus (MR) and permanent deformation (PD), considering natural soils and mixtures with 10% and 20% RAP, as well as chemical stabilization with 2% cement. The results indicated that the incorporation of RAP improved the resilient response, increasing structural stiffness and reducing the accumulation of plastic deformations. Cement stabilization enhanced these effects, doubling the MR values and mitigating progressive deformations. The influence of confining stress was crucial in increasing the stiffness of the stabilized mixtures, while deviator stress significantly influenced the progression of permanent deformation, indicating higher structural resistance in mixtures with 10% RAP and cement, evaluated after seven days of curing. The applied models showed determination coefficients (R²) above 0.90, demonstrating a strong correlation between mechanical parameters and the obtained adjustments. Computational analyses performed using the MeDiNa software confirmed the structural feasibility of the evaluated mixtures under different traffic conditions, highlighting improvements in fatigue resistance and lower susceptibility to permanent deformation accumulation over time. The results contribute to a better understanding of the influence of lateritic granular soil stabilization with asphalt residues, providing guidelines for future applications in road infrastructure. It is concluded that the combination of RAP and chemical stabilization represents a sustainable and efficient alternative for pavement construction, reducing the need for natural aggregate extraction and promoting the reuse of asphalt industry residues.

COMMITTEE MEMBERS:
Presidente - ***.307.994-** - ENIO FERNANDES AMORIM - IFRN
Interno - 1692497 - OSVALDO DE FREITAS NETO
Externo ao Programa - ***.875.244-** - JOHN KENNEDY GUEDES RODRIGUES - UFCG
Externa à Instituição - SILVANA FAVA MARCHEZINI - IFMT