Banca de QUALIFICAÇÃO: CASSIANA MENDONCA DOS SANTOS

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : CASSIANA MENDONCA DOS SANTOS
DATE: 03/04/2023
LOCAL: Programa de Pós-Graduação em Ciência de Materiais
TITLE:

DESIGN, PREPARATION AND CHEMICAL, PHYSICAL AND STRUCTURAL CHARACTERIZATION OF GEOPOLYMERS WITH GLASS WASTE FROM LONG NECK NONRETURNABLE BOTTLES.

KEY WORDS:

Geopolymer. Waste. Long neck

PAGES: 114
BIG AREA: Outra
AREA: Multidisciplinar
SUMMARY:

Advances in technology and science due to increased population density, migration of the population from rural to urban areas and industrial growth result in a significant volume of waste generation, exhaustion of raw materials and worrying levels of greenhouse gas emissions greenhouse, phenomena that demonstrate an essential need for change. In this context, the possibility of using waste from nonreturnable long neck bottles, instead of natural raw materials, is a strategy to mitigate environmental problems derived from solid waste, while reducing the consumption of the planet's natural resources. An interesting class of sustainable materials consists of geopolymers. These materials can be considered as inorganic polymers prepared in a highly alkaline medium. From a structural point of view, geopolymers are formed by a long cross-linked chain between tetrahedral units of AlO4 and SiO4, which give rise to an integrated three-dimensional structure. The present work seeks to investigate the technical viability of the production of geopolymers based on metakaolin and different types and contents of waste from long neck bottles. The raw materials were microstructurally characterized by X-Ray Fluorescence (FRX), X-Ray Diffraction (XRD) and Fourier Transform Infrared Spectroscopy (FTIR). Subsequently, the thermal behavior of kaolin and metakaolin were studied by Thermogravimetry (TG/DTG). The mechanical behavior of the geopolymers was analyzed from the compressive strength and parameters such as SiO2/AlO3 ratio, molar concentration of the activator solution, curing conditions and glass waste addition levels were analyzed to reach the best methodology to be adopted in the production of geopolymers with partial replacement of waste glass from long neck bottles. The results show a SiO2/AlO3 ratio equal to 3.0, 10 M activator solution and closed curing conditions at room temperature or at 35 °C, as the most adequate parameters to continue the technical analysis of geopolymers with bottle residues long neck incorporated into its geopolymeric network, in order to appropriately allocate the intense residual demand for this type of bottle and technically analyze the viability of glass waste in the geopolymeric matrix.

COMMITTEE MEMBERS:
Externa à Instituição - ALINE FIGUEIREDO NÓBREGA DE AZEREDO - UFPB
Externo à Instituição - JULIO CEZAR DE OLIVEIRA FREITAS - UFRN
Externo ao Programa - 1810494 - KLEBER GONCALVES BEZERRA ALVES - null