Compósitos cimentícios têxteis reforçados com resíduo de vestuário
Grings, Kátia Jocasta Ortiz
MetadataShow full item record
DescriptionPolyester is the fiber with the highest production in the world and greatest potential for generating waste. The fabric scraps are liable to be recycled, becoming a raw material for other industries. In this research, the objective is to evaluate the use of polyester clothing waste as reinforcement in cementitious composites without structural function. For this, low specific mass traits were developed with the use of light vermiculite aggregate. In order to avoid a fast degradation of the textiles, partial replacement of the cement (25%) by fly ash (FA) was used and the waste was treated by impregnation with styrene butadiene polymer (SBP) and silica fume (SF). Physical and chemical characterization of the materials was carried out; screaning and treating waste for conversion to reinforcement, and its characterization; characterization of the cementitious matrix in the fresh and hardened state; evaluation of the mechanical properties and microstructure of composites without reinforcement, reinforced with untreated clothing waste, treated by impregnation with SBP and SBP + SF. The fabrics without impregnation and impregnated with SBP showed, respectively, 22.69% and 13.48% more satisfactory performance in the warp direction, whereas those impregnated with SBP + SF obtained equivalent values in both directions of the fabric. The high particle size of the FA, the resistance to axial compression of the lower cement matrix in the specimens with FA and the low consumption of CH verified in the TG/DTG test in the FA paste, indicate the low reactivity of the pozzolana. In the specimens without FA, there was an increase in the resistance to direct traction of 53.57% and 64.28%, as well as 92.10% and 94.73% in the tensile strength of the composites with reinforcement impregnated with SBP and SBP + SF, respectively, in relation to those without reinforcement. In addition, in the direct traction test, the greater number of cracks in the specimens in which the reinforcement received SBP in relation to the one without impregnation, indicate the benefit of the treatment. The plates with greater tenacity in the impact test were those with fabric impregnated with SBP + SF. Based on this study, since FA was used without processing, no benefits were observed. In turn, the reinforcements contributed to the performance of the composite in terms of the properties evaluated, especially when the reinforcement received treatment by impregnation.
CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior