Banca de DEFESA: INÁCIO SANTIAGO DE OLIVEIRA QUEIROZ
Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.DISCENTE : INÁCIO SANTIAGO DE OLIVEIRA QUEIROZ
DATA : 07/06/2018
HORA: 09:00
LOCAL: mini-auditório do prédio 18
TÍTULO:
Development of ultra high strength concrete using locally available materials from the northern region of Minas Gerais
PALAVRAS-CHAVES:
UHSC, silica fume, quartz powder; thermal curing; wet curing
PÁGINAS: 90
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Civil
SUBÁREA: Estruturas
ESPECIALIDADE: Estruturas de Concreto
RESUMO:
Ultra High Strength Concrete (UHSC) is ranked among the most advanced concrete technologies. The UHSC allows more challenging works, with great potential and architectural value, providing an esthetic value to the buildings or special structures. UHPC technologies raise the interest of the prefabricated concrete industry as a basis material for modern construction methods. The costs involved in manufacturing this material, in line with the high consumption of cement per m3, limit the expansion of production at scale. The use of local materials, by-products of the production of silicon metal, promotes the proper destination of by-products and reduces the cost of the production of such concretes. The use of new technologies in the execution of concrete structures can lead to direct gains, such as reduction of concrete volume, reduction of steel consumption and higher execution speed, requiring less living work hours, and indirect gains, such as reduction of impacts, design flexibility and reduction of the cross section. The performance of the UHSC is strongly influenced by the optimization of the packing of particles, that is, the better this packaging, the greater the degree of compactness and the effective performance of the concrete. The objective of this work is to compare the mechanical properties of the UHSC, in the fresh and hardened state, produced with three different types of Portland cement, using active silica and quartz powder, from the northern region of Minas Gerais, with different types of cure. It was possible to achieve compressive strength above 200 MPa with thermal cure and above 170 MPa with wet curing at 28 days. The Modified Andreassen method was used for the packing of particles with the factor q = 0.32.
MEMBROS DA BANCA:
Presidente - PETER LUDVIG
Interno - PAULO HENRIQUE RIBEIRO BORGES
Externo à Instituição - ADRIANA GUERRA GUMIERI - UFMG