Research Information System
Thesis Type: Postgraduate
Institution Of The Thesis: Gazi University, Fen Bilimleri Enstitüsü, Turkey
Approval Date: 2024
Thesis Language: Turkish
Student: Koray KAYSİ
Principal Supervisor (For Co-Supervisor Theses): Nuray Oktar
Co-Supervisor: Birce Pekmezci Karaman
Open Archive Collection: AVESIS Open Access Collection
Abstract:
In this study, the effect of using waste paper pulp as a fiber source and waste glass (WG) as aggregate on cement composite board properties was investigated. The large consumption of aggregates in the cement composite board production process and the low quality requirements make the construction industry one of the most promising ways of solving the environmental burden of WG. The use of waste paper pulp is expected to reduce the dependency on forest resources. In the studies, waste paper pulp was substituted for raw cellulose at the rates of 10%, 20%, 30%, 40% and 50%, respectively. As the waste paper pulp substitution rate increased, the bending strength, water absorption rate and porosity values decreased by up to 42.3%, 10.8% and 8.7%, while the density value increased by up to 2.4%. In the waste glass aggregate production stage, waste glass was ground in a ball mill and sieved in the following process to obtain waste glass in four different particle sizes (0 38, 38-63, 63-90 and 90-212 μm). In the first stage of cement composite board production, 10%; 20% and 50% waste glass was substituted by weight into the aggregate for all particle sizes. Flexural strength, water absorption (WA), open porosity and dry apparent density tests were carried out on the cement composite board samples in accordance with the TS EN 12467 standard. Statistical analysis study was conducted to determine the optimum particle size range. The best result was obtained from samples containing up to 20% waste glass in the 0-38 μm particle size range. In the second stage of the study, 0-38 μm WG was substituted into aggregate up to 20% at 4% intervals. The optimum results were obtained from %8 WG substitution. Flexural strength, density, WA and open porosity values were found to be 6.39 N/mm2; 1416 kg/m3; 26.37% and 36.94% respectively. While the flexural strength, WA and open porosity values increased by 5.1%; 4.8% and 2.6%, respectively, compared to the control sample, density value decreased by 1.2%. According to the life cycle assessment results, it was seen that the use of waste glass reduced the environmental impact of the cement composite board production process by 2.7%, as expected.
Key Words : Waste glass, cement composite, sustainability, recycling