Banca de DEFESA: RICARDO EUGENIO BARBOSA RAMOS FILHO

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : RICARDO EUGENIO BARBOSA RAMOS FILHO
DATE: 15/01/2021
TIME: 09:00
LOCAL: GOOGLE MEET: https://meet.google.com/csi-ovzs-jcf
TITLE:

Study of scheelite residue, stone powder and cassava wastewater combination with binders for production of ecological bricks

KEY WORDS:

Ecological brick; Scheelite residue; Stone powder; Cassava wastewater; Sustentability.

PAGES: 158
BIG AREA: Engenharias
AREA: Engenharia de Materiais e Metalúrgica
SUBÁREA: Materiais Não-Metálicos
SPECIALTY: Cerâmicos
SUMMARY:

One of the largest consumers of natural resources on the planet is the civil construction industry, which can reduce this high consumption through the reuse of residues from mineral and vegetal extraction, which are generated in large volumes, causing environmental and social impacts in their regions of extraction. Several researches have been carried out with the use of residues in construction materials, with emphasis on the soil-cement brick, also called ecological brick, as there is no need for thermal treatment to sinter the clay minerals. Carrying out a systematic research it was verified the use of several solid residues incorporated in the soil as the scheelite residues and stone powder, that are generated in great quantities in the State of Rio Grande do Norte. In substitution, water has been used in soils such as manipueira, the liquid residue of cassava, which has agglutinating properties. A study of the combination of scheelite residue, stone powder and manipueira with the addition of binders is carried out aiming at an ecological brick with physical and chemical properties suitable for use in society that substitutes soil and water for waste. The physical, chemical and mineralogical characterization of the materials was carried out and then the compaction test to evaluate the best combination of the solid waste mixture, being determined in 50% of each residue. Technological essays were carried out on cylindrical specimens of solid residues with the addition of cement and / or lime hydrated with water, obtaining satisfactory results for cement formulations, being used for the production of bricks with the addition of manipueira instead of water in 11.5% with respect to the mass of the solid wastes. The technological tests of the bricks showed satisfactory results, justified by the high packaging between the residues and properties of the manipueira, with cement phases being observed in the analysis of scanning electron microscopy and X-ray diffraction. The ecological brick is promising for use as sealing masonry, being competitive in the market due to the low cost and easy availability of waste. The ecological brick is promising for use as sealing masonry, being competitive in the market due to the low cost and easy availability of waste, highlighting the formulation with 9% addition of cement to the waste mixture.

BANKING MEMBERS:
Externa ao Programa - 2331385 - JAQUELIGIA BRITO DA SILVA
Externa à Instituição - PRISCYLLA CINTHYA ALVES GONDIM - IFRN
Externa à Instituição - SHEYLA KAROLINA JUSTINO MARQUES - IFAl
Externo à Instituição - VAMBERTO MONTEIRO DA SILVA - IFPB
Presidente - 1149564 - WILSON ACCHAR