Banca de DEFESA: LARISSA CAVALCANTE DE ARAUJO MELLO
Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.DISCENTE : LARISSA CAVALCANTE DE ARAUJO MELLO
DATA : 29/07/2019
HORA: 14:00
LOCAL: Auditório do CTEC
TÍTULO:
Effects of high temperatures on self-supported concrete with high biomass residues of sugarcane and metakaolin.
PALAVRAS-CHAVES:
Sustainable concrete; ash from sugarcane bagasse; durability; high temperatures; spalling; gismondine.
PÁGINAS: 95
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Civil
RESUMO:
SCCs can reduce their high content of their contributions to become a support material for minimizing CO2 production by the cement industry. In addition, as the properties can be reduced in the mechanical properties and durability of the concrete. The performance parameter is the material of the stage in the extreme situations when it is warmed up, the ones similar to those reached in a fire. In this situation, the elasticity and modulus strength, color change and porosity, as well as effect fragmentation, can occur in concrete due to loss of water and microstructural changes. In this context, the present study aims to evaluate the high temperatures of self-compacting concretes with the contents of residues of sugarcane biomass (SCBA) and metakaolin (MK). For this, the cement was replaced by 30% by 50% by the mineral additions. No fresh state, as already existing, proved a workability of ready-made concrete. In the hardened state, as the samples were analyzed at room temperature, 200 ° C, 400 ° C, 600 ° C and 800 ° C and analyzed for tactile-visual changes, mass loss, compressive strength, ultrasonic pulse velocity, absorption of water by immersion, voids index, mass, absorption by capillarity and X-ray diffraction. CAA search results with up to 40% of their emissions are more sensitive to high temperatures and higher metakaolin insertions are left at high temperatures. Also, the mineral content content consumes the Ca (OH)2 of the medium and forms calcium silicate and aluminum hydrated.
MEMBROS DA BANCA:
Interna - 1717461 - LUCIANA DE FIGUEIREDO LOPES LUCENA
Presidente - 022.621.844-96 - MARCOS ALYSSANDRO SOARES DOS ANJOS - IFRN
Externa ao Programa - 1507841 - MARIA DAS VITORIAS VIEIRA ALMEIDA DE SA
Externo à Instituição - WENDELL ROSSINE MEDEIROS DE SOUZA - UFERSA