Banca de QUALIFICAÇÃO: MAG GEISIELLY ALVES GUIMARAES

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : MAG GEISIELLY ALVES GUIMARAES
DATE: 28/07/2021
TIME: 09:00
LOCAL: Ambiente virtual por conferência web via Rede Nacional de Ensino e Pesquisa (RNP)
TITLE:

Estimation of the geosynthetics’ durability  under synergy: tensile creep and weathering

KEY WORDS:

Durability. Creep. Geosynthetics. Weathering. Sinergism.

PAGES: 184
BIG AREA: Engenharias
AREA: Engenharia Civil
SUBÁREA: Construção Civil
SPECIALTY: Materiais e Componentes de Construção
SUMMARY:

Civil engineering is responsible for numerous transformations in the physical-geological environment in order to meet society's demands. Geosynthetics are polymeric matrix products used in civil engineering with different functions. In the last decades, these have been gaining market as a technological and sustainable alternative, since in different areas they present lower impacts and costs in comparison to conventional projects. One of the implications is the knowledge of their durability against the degradation factors inherent to the environment in which they are used during the project lifetime. The present research aims to estimate the durability probability of geosynthetics under tensile creep and field weathering synergism. This analysis includes weathering tests between winter/2020 to autumn/2021, in isolation and together with tensile creep, with the 15% loading of the ultimate tensile strength. Specifically, a polypropylene woven geotextile is evaluated as an example study. Mechanical parameters retained after the tensile tests will be assessed by statistical tools, besides obtaining a probability density function (pdf) that best fits the durability behavior under degradation synergism. As preliminary results, the influence of climatic dynamics on the geotextile creep deformation is verified, especially in tests initiated in the spring and summer weather stations, to the detriment of higher ultraviolet radiation incidence and average daily temperatures. Therefore, the climatic dynamics at the exposure beginning were relevant in the durability behavior over time and, possibly, will influence the tensile strength retained after test time. The knowledge of the geosynthetics durability in medium and long-term applications is justified by increasing the reliability of design lifetime estimates and contributing to different sustainable applications in civil engineering.

BANKING MEMBERS:
Interna - DENISE DE CARVALHO URASHIMA
Interno - CONRADO DE SOUZA RODRIGUES
Externo à Instituição - EDUARDO SOUZA CÂNDIDO - UFLA
Externo à Instituição - JEFFERSON LINS DA SILVA - USP