Banca de DEFESA: IGOR MACHADO DA SILVA PARENTE
Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.DISCENTE : IGOR MACHADO DA SILVA PARENTE
DATA : 18/08/2020
HORA: 08:30
LOCAL: PROGRAMA DE PÓS-GRADUAÇÃO EM ENGENHARIA CIVIL
TÍTULO:
PARAMETERS OF DURABILITY OF SISAL-CEMENT COMPOSITE FOR USE AS PERMANENT FORMS OF ARMED CONCRETE BEAMSPALAVRAS-CHAVES:
Durability. Permanent formwork. Composites. Sisal fibers. Reinforced concrete.
PÁGINAS: 146
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Civil
RESUMO:
Civil construction is one of the sectors with the greatest impact on the environment, due to the consumption of non-renewable natural materials and the generation of waste. The use of wooden formworks has become a cause of environmental concern due to the amount of material discarded during the construction of reinforced concrete structures. Permanent formworks produced in composites reinforced with sisal fibers have been used as an alternative to the form of wood, but they can affect the durability of reinforced concrete beams if they present greater permeability than original covering concrete. In this work, the effect of fiber content on durability parameters of sisal-cement composites, used in the production of permanent forms for reinforced concrete beams, is investigated. Cementitious composites with a self-compacting mortar matrix and reinforced with 0%, 2%, 4% and 6% fibers, by mass of binder, were characterized in terms of physical and mechanical properties and in terms of durability. The evaluation of the physical properties of the composites shows the reduction of water absorption by immersion and the capillarity of the composites reinforced with 2% and 4% of fibers, in comparison with the matrix. Despite the reduction in compressive strength, the addition of fibers increased the residual stress of the composite under bending. Regarding the durability parameters, it appears that the electrical resistivity of the composites reduced with the addition of fibers and that the composites with 2% of fibers presented less carbonation thickness than the matrix. The results of the chloride migration test indicate a mixture with 2% of fibers showed the lowest diffusion coefficient in the non-stationary state than the matrix and that all composites showed a high resistance to chloride penetration.
MEMBROS DA BANCA:
Interno - 2137887 - CLEBER MARCOS RIBEIRO DIAS
Interno - 1779028 - DANIEL VERAS RIBEIRO
Presidente - 549.925.915-15 - PAULO ROBERTO LOPES LIMA - UFRJ
Interno - 2178571 - RICARDO FERNANDES CARVALHO
Externo à Instituição - SAULO ROCHA FERREIRA