Banca de DEFESA: KARINA PAULA BARBOSA DE ANDRADE LIMA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : KARINA PAULA BARBOSA DE ANDRADE LIMA
DATE: 02/06/2023
TIME: 14:00
LOCAL: meet.google.com/svz-cuqr-jvu
TITLE:

Perspectives for environmental and technological innovation in the reuse of textile waste for the civil construction sector in the state of Pernambuco

KEY WORDS:

Mortar; Textile waste; Textile sludge; Industrial laundry; Composite.

PAGES: 129
BIG AREA: Engenharias
AREA: Engenharia Sanitária
SUMMARY:

Textile sludge is the solid waste produced in the jeans beneficiation process in industrial laundries, and can be defined as a material of varied composition and high moisture. This residue consists in flocculated particles from liquid effluents and impurities carried by fabrics, from the production, cutting and sewing stages. The environmental impacts caused by textile sludge have the potential to pollute soil and water, due to its contamination with chemicals remaining from products applied to jeans. The present study aims to analyze the behavior of Portland cement mortars incorporated with alternative fine aggregate (sludge) in partial replacement at levels of 0, 10 %, 20 % and 25 % (ALT-0, ALT-10, ALT-20 and ALT-25) to conventional aggregate (natural sand), seeking a sustainable destination for this material. The research program started from the collection of secondary data, with a bibliometric analysis carried out using the PRISMA methodology, focused on the application of textile sludge in construction materials. The proportion used for molding the mortars was 1:1:6, in cement, lime and sand, and the sample set contains prismatic and cylindrical test specimens. Simultaneously with molding, fresh state tests were performed on mortars, while tests in the hardened state occurred after a curing period of 28-day, to which the analysis of variance (ANOVA) was applied to assess whether there were significant changes in these properties. Textile sludge had an average water content of 68.9 %, organic matter content of 3.33 % and granulometric curve classified as optimal zone for fine aggregate; chemical composition indicated the presence of calcium, silicon, magnesium and aluminum and the XDR test identified the material as amorphous. The specific mass of treated sludge represented 61.6 % of natural sand. Mortars with textile sludge showed a significant decrease in mass density and compressive strength. As for capillary absorption, mortar with 20 % sludge presented the best result, with reduction of 87.80 %, compared to reference mortar. Standard mortar and ALT-20 mortar have statistically equal tensile strength, presenting the possibility for application in coatings for internal and external walls and ceilings. Mortars with sludge incorporation have potential for application in construction, specially ALT-20 mix. The feasibility analysis indicated decrease of 23.18 % in the cost of mortar production with 20 % of sludge to the reference mixture, in addition to reducing CO2 emissions by 31.40 % from the production and transport of the fine aggregate.

COMMITTEE MEMBERS:
Interno - ALEX SOUZA MORAES
Presidente - ROMILDO MORANT DE HOLANDA
Externa à Instituição - YÊDA VIEIRA POVOAS