Banca de DEFESA: VITOR AFFONSO LOPES SILVEIRA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : VITOR AFFONSO LOPES SILVEIRA
DATE: 31/10/2022
TIME: 14:00
LOCAL: Microsoft Teams
TITLE:

Waste from the Sanitary Ceramic industry as Supplementary Cementium Material

KEY WORDS:

solid waste, sanitary ceramics, reuse, supplementary cement material, Portland cemen

PAGES: 48
BIG AREA: Engenharias
AREA: Engenharia de Minas
SUBÁREA: Tratamento de Minérios
SPECIALTY: Métodos de Concentração e Enriquecimento de Minérios
SUMMARY:

The manufacturing process of sanitary ceramics leads to the generation of industrial waste with different characteristics, obtained according to the processing steps in which they are generated and the products manufactured. The chemical composition of these materials are similar of their raw material, and their physical properties can be easily modified in order to reuse them. Thus, several works have been developed to value materials like this. It is believed that they can be used as a supplementary raw material in the production of civil construction objects, either through their application as aggregates or even as a partial replacement for Portland cement. To contribute to the carbon footprint, as well as the preservation of mineral resources, the cement industry has used supplementary cementitious materials (SCM) as a partial replacement of clinker in Portland cement. In this sense, the present work evaluated the reuse potential of solid waste accumulated in a settling pond of an industry located in the Minas Gerais triangle. For this, the collected sample was characterized by granulometric analysis, X-ray diffraction, X-ray fluorescence, microscopy, and loss on ignition. To evaluate the residue as SCM, tests of heat of hydration, electrical conductivity in calcium hydroxide solution and determination of the performance index with Portland cement were carried out. Concrete mortars were produced with partial replacement (12.5% and 25%) of a cement with reduced additions by the residue. These mortars were evaluated by means of compressive strength at seven and 28 days, specific mass, voids ratio, water absorption and performance against acid attack. The chemical composition by XRF indicated the oxides SiO2, CaO and Al2O3 and the XRD analysis points to the presence of quartz, kaolinite and bassanite as predominant minerals. The application of the residue reduced the heat of hydration and the porosity of the mortar, leading to an increase in its durability. Although the electrical conductivity results point to non-pozzolanicity, the compressive strength did not show significant changes, which suggests that the residue can be used in pozzolanic cement compositions (CP IV).

BANKING MEMBERS:
Interno - ALEXANDER MARTIN SILVEIRA GIMENEZ
Interno - DOMINGOS SAVIO DE RESENDE
Interna - MARCELA MAIRA NASCIMENTO DE SOUZA SOARES
Externo ao Programa - AUGUSTO CESAR DA SILVA BEZERRA
Externo à Instituição - ANTONIO MARIA CLARET GOUVEIA