Banca de DEFESA: Laura Borges Costa

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : Laura Borges Costa
DATE: 29/06/2022
TIME: 08:30
LOCAL: Sala Virtual - Microsoft Teams
TITLE:

Mortar feasibility study with phyllite addition

KEY WORDS:

waste generation, waste rock pile, environmental sustainability, mortar, phyllite.

PAGES: 95
BIG AREA: Engenharias
AREA: Engenharia de Minas
SUBÁREA: Tratamento de Minérios
SPECIALTY: Métodos de Concentração e Enriquecimento de Minérios
SUMMARY:

Mining has a huge influence on the world’s economy, being responsible for the generation of several direct and indirect jobs. However, mining collides with a recurrent and inherent process in the industry: waste generation. Environmental sustainability actions have been adopted in different production line aiming to reduce the impacts involved on the generation and storage of that waste materials. Therefore, the goal of this project is to apply phyllite, an abundant rock in Brazil, and often considered as a waste of mining, in mortars as a substitute for binder (lime) and fine aggregate, without changing the properties of the mortar due to the presence of the phyllite, and aiming inserting in the market a new product with good technical performance and economic viability. For this, laboratory tests were carried out following national standards, totaling a standard mix and five replacements in traditionally dosed mortar in the proportion of 1:1:6 in volume of cement, binder and sand, in which 50% of the fine aggregate was replaced by different granulometric ranges of phyllite and 37.5% and 75% of the quantities of phyllite inserted as a binder substitute. Cylindrical specimens of 5x10 cm and squares of 5x5x5 cm were molded in order to perform uniaxial compressive strength, permeability, hardened state density tests, as well as water retention tests, fresh density tests. Furthermore, the mortar was applied to a roughened wall in order to analyze its performance and perform the permeability test. Through the tests’ preformation, is possible to conclude that the presence of phyllite on the mortar improves the analyzed properties such as uniaxial compressive strength, permeability, hardened state density tests, water retention tests, fresh density tests when compared with the standard mortar, especially the substitutions C1A and C1A2.

BANKING MEMBERS:
Presidente - ALEXANDER MARTIN SILVEIRA GIMENEZ
Interna - MARCELA MAIRA NASCIMENTO DE SOUZA SOARES
Interno - FABIO DE SAO JOSE
Externa ao Programa - DELMA PEREIRA CAIXETA