Este trabalho foi apresentado no 6th Amazon & Pacific Green Materials Congress and Sustainable Construction Materials LAT-RILEM Conference, realizado em Cali, Colômbia. Tratou do relato da condição apresentada por diversos componentes construtivos à base de bambu, após 17 anos de exposição às intempéries.
Bamboo is one of the raw materials exhibiting the greatest potential for construction applications, especially in rural areas. According to its physical and mechanical properties, several species of bamboo can be employed in building elements design. In order to verify the material performance, in the year 1999, on the campus of the Unicamp, it was designed and built an experimental house employing several bamboo species as Dendrocalamus asper (columns and beams), Guadua angustifolia (beams), Bambusa tuldoides as well as Bambusa vulgaris (walls) and Phyllostachys aurea (windows, door and closing). In addition, the protective sidewalk and undulated tiles were made from mixtures of plant biomass and Portland cement mortar (Biokreto®).
In the structure they were employed G. angustifolia stems; D. asper columns were treated in 5% solution of chromated copper borate (CCB). Walls of bahareque from B. tuldoides splits were protected by Portland cement and sand mortar, modified by sugar cane bagasse fibers addition. Windows and doors were made from natural P. aurea culms recovered by polymer. Sidewalk and undulated tiles were made of Portland cement and sand mortar, reinforced with bamboo particles and rice husk, respectively. Past 17 years, the housing components were evaluated by visual aspects. It was observed that D. asper columns have been completely destroyed by termites; due to the fungi´s action the aerial structure of D. asper crushed. Wall of bahareque from B. tuldoides and B. vulgaris showed black spots only at the bottom and they supported the roof loads due to horizontal steel reinforcement. Windows and doors were damaged due to cracks generated in the polymer matrix. As a positive aspect, sidewalk and undulated tiles did not decay.
Beraldo, A. L.
non – conventional materials, composite, decay, building.Download