Banca de DEFESA: VICTOR VINICIUS DE OLIVEIRA FERREIRA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : VICTOR VINICIUS DE OLIVEIRA FERREIRA
DATA : 21/03/2018
HORA: 14:00
LOCAL: AUDITÓRIO DO CT
TÍTULO:

CAATINGA SPECIES INDICATED FOR CIVIL CONSTRUCTION


PALAVRAS-CHAVES:

Wood; Civil Construction; Caatinga.



PÁGINAS: 110
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Civil
SUBÁREA: Construção Civil
RESUMO:

Wood is a sustainable material with multiple purposes, with civil construction among them. Much of the wood consumed in Brazil comes from the Amazon Forest, and although the country has great forest potential, a culture of masonry construction is predominant. The Caatinga is a rich and special biome with great exploitation potential for civil construction. Caatinga tree species have characteristics of short height and tortuous stems with small diameters. The main destination of these species is for use as firewood and coal. Thus, the present study aims to analyze the feasibility of using Caatinga wood species in the composition of constructive systems and structural elements. Caatinga species with potential use in construction have been identified, and the species Angico, Jurema Preta, Mororó and Pereiro were selected. Samples were collected from 48 trees, corresponding to twelve of each species from the Riacho do Cabra Farm located in the Municipality of Santa Cruz-RN. Wood splitting was carried out at the Escola Agrícola de Jundiaí (EAJ) in the Municipality of Macaíba-RN and characterization tests were carried out at the University of São Paulo (USP) in São Carlos-SP. The characterization corresponded to assays for density, dimensional stability, compressive strength, traction parallel to the fibers and shear strength according to the NBR 7190:1997. The data were analyzed in accordance with the Standard NBR 7190:1997 by calculating the characteristic resistances, the mean values and the standard deviation of the variables. The Spearman Correlation test was used and the level of significance was set at 5%. The density test result evidenced denser woods with values close to wood commonly used in construction such as Maçaranduba and Jatobá. The species presented good values for compressive strength parallel to the fibers and the shear strength, both being classified as average. The other mechanical and stiffness properties were classified as weak. Angico stood out with the highest values of compressive strength, traction parallel to the fibers and stiffness. Jurema Preta had the highest shear strength value. A statistical significance was found between the apparent density and the compressive strength parallel to the fibers in Angico (p = 0.002) and Mororó (p= 0.006); compressive strength parallel to the fibers and modulus of elasticity for compression parallel to the fibers in Angico (p=0.055) and Pereiro (p=0.022); modulus of elasticity for traction parallel to the fibers and tensile strength parallel to the fibers in Jurema Preta (p=0.040); and highlighting the Angico species with a strong strength correlation of apparent density and compressive strength parallel to the fibers. Thus, the physical properties, the strength and stiffness values were representative for all species, evidencing their possible use in civil construction as fences, braces, scaffolds, roofing elements, frames in general, beams, wainscoting/paneling, panels, mountings/trimmings, linings, and skirting boards/footers, as well as in construction systems such as the lamellar structural system.


MEMBROS DA BANCA:
Presidente - 1694892 - EDNA MOURA PINTO
Interno - 1515200 - JOSE NERES DA SILVA FILHO
Externo à Instituição - ROSIMEIRE CAVALCANTE DOS SANTOS - UFRN
Notícia cadastrada em: 19/03/2018 10:08
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