The Effect of Polymer Waste Addition on the Compressive Strength and Water Absorption of Geopolymer Ceramics

• Published in: Applied sciences Vol. 11; no. 8; p. 3540
• Main Authors: Linda Bih, Numfor, Aboubakar Mahamat, Assia, Bidossèssi Hounkpè, Jechonias, Azikiwe Onwualu, Peter, Boakye, Emmanuel E.
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 01-04-2021
• Subjects: Absorption; Addition polymerization; Caustic soda; Cement; Ceramics; Chemical bonds; Composite materials; Compressive strength; COVID-19; Curing; Fracture surfaces; geopolymer ceramics; Geopolymers; Health risks; Kerosene; Low density polyethylenes; Metal oxides; Photomicrographs; Polyethylene; Polyethylene terephthalate; polymer waste; Polymers; Potash; Potassium; Public health; Sodium; Sodium hydroxide; Sodium silicates; Spectrum analysis; Water absorption; Nigeria
• ISSN: 2076-3417; 2076-3417
• DOI: 10.3390/app11083540

The quantity of polymer waste in our communities is increasing significantly. It is therefore necessary to consider reuse or recycling waste to avoid an increase in the risk to public health. This project is aimed at using pulverized low-density polyethylene (LDPE) waste as a source to reinforce and improve compressive strength, and to reduce the water absorption of geopolymer ceramics (GC). Clay:LDPE composition consisting of 5%, 10%, and 15% LDPE was geopolymerized with an NaOH/Na2SiO3 solution and cured at 30 °C and 50 °C. Characterization of the geopolymer samples was carried out using XRF and XRD. The microstructure was analyzed by SEM and chemical bonding by FTIR. The SEM micrographs showed LDPE particle pull-out on the geopolymer ceramics’ fracture surface. The result showed that the compressive strength increases with the addition of pulverized polymer waste compared to the controlled without LDPE addition. Water absorption decreased with an increase in LDPE addition in the geopolymer ceramics composite.