Banca de DEFESA: LETÍCIA AZEVEDO DE FARIAS PEREIRA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : LETÍCIA AZEVEDO DE FARIAS PEREIRA
DATE: 07/07/2021
TIME: 09:00
LOCAL: LINK - (meet.google.com/cmq-fmrg-feo) - AMBIENTE VIRTUAL - MEET
TITLE:

COMPARATIVE ANALYSIS OF PAVIMENTS STRUCTURES USING CDW AND DIMENSIONED FROM DIFFERENT PARAMETERS

KEY WORDS:

MeDiNa, Pavement Design, Resilience Module.

PAGES: 178
BIG AREA: Engenharias
AREA: Engenharia Civil
SUBÁREA: Geotécnica
SPECIALTY: Pavimentos
SUMMARY:

This dissertation presents designs of flexible pavement structures developed considering two different methods, which make use of the resilience modulus (MR) and the California Bearing Ratio (CBR), applying soil mixtures with construction and demolition residues/wastes (CDW), and soil-gravel mixtures in base layer and/or sub-base, in order to develop a cost comparison between these methods and between materials. The soil, coming from the city of Ipueira/RN, was identified by the MCT assay as NG’, with non-laterite behavior, the CDW and gravel used had nominal sizes of 19mm. Mixtures of soil-gravel and soil-CDW were made using pure soil and aggregates in the percentages of 15%, 30%, 45% and 60%, by mass. Resilience modulus tests were carried out in all mixtures and permanent deformation (DP) in mixtures with soil-CDW in the proportion of 70% soil and 30% residue. The MR tests were carried out at 1 Hz and the permanent deformation tests with a minimum application of 150,000 load cycles, at 2 Hz frequency. The characterization and analysis of the mixtures showed that the evaluated proportions did not obtain adequate framing in the granulometric ranges for use in the base layer. The results obtained in the RM tests were satisfactory and the mixtures of soil-gravel 70-30 and soil-CDW 70-30 presented the highest values of mean MR. The parameters of the regressions (R²) obtained in the Statistica 10.0 software through the composite model executed based on the data from the MR tests, showed that the mixtures have a significant influence of the confinement and deviation stresses considered simultaneously. Based on the regression parameters, pavement structures designed with the MeDiNa software were proposed. The material selection criterion for the design using the CBR method made it impossible to use the soil-CDW 70-30 in the base layer, but in the design performed in the MeDiNa software it was found that this material can be used in base and sub-base layers, in certain design situations, since it was possible to adjust structures that met the fatigue criteria of the coating and permanent deformations for the useful life period.

BANKING MEMBERS:
Presidente - 028.307.994-02 - ENIO FERNANDES AMORIM - IFRN
Interno - 1149451 - OLAVO FRANCISCO DOS SANTOS JUNIOR
Externa ao Programa - 234.681.656-68 - LAURA MARIA GORETTI DA MOTTA - UFRJ
Externa à Instituição - VERÔNICA TEIXEIRA FRANCO CASTELO BRANCO - UFC