Fly ash and ceramic tile industrials waste: landfills to construction materials

• Published in: Clean technologies and environmental policy 2023-12, Vol.25 (10), p.3247-3261
• Main Authors: Packrisamy, Kavitha, Jayakumar, Karthikeyan
• Format: Article
• Language: English
• Subjects: Carbon dioxide; Carbon dioxide emissions; Ceramics; Compressive strength; Concrete; Concrete aggregates; Concrete mixes; Construction industry wastes; Construction materials; Cost control; Earth and Environmental Science; Electrical resistivity; Emission; Environment; Environmental Economics; Environmental Engineering/Biotechnology; Environmental policy; Flexural strength; Fly ash; Hazardous wastes; Industrial and Production Engineering; Industrial Chemistry/Chemical Engineering; Industrial wastes; Landfill construction; Landfills; Mechanical properties; Modulus of elasticity; Natural resources; Original Paper; Property; Resource depletion; Substitutes; Sustainability; Sustainable Development; Tensile strength; Waste disposal sites; Water absorption
• ISSN: 1618-954X; 1618-9558
• DOI: 10.1007/s10098-023-02624-x

Utilizing industrial wastes in concretes solves environmental issues such as disposal, depletion of natural resources, and CO 2 emission. In this research, fly ash (FA) and ceramic tile waste (CTW) were used in making concrete. FA was used as a partial replacement for cement (30%), and CTW was used as a partial to total replacement for fine aggregate (10–100%). According to the experimental findings, 30% substitution of FA increased the compressive strength (10.05%), tensile strength (9.15%), flexural strength (6.9%), and elastic modulus (9.4%). The optimal level of CTW substitution in fly ash concrete was found to be 40%. At this level, compressive strength, tensile strength, flexural strength, and elastic modulus were increased by 10.56%, 9.3%, 6.9%, and 8.86%, respectively. The fly ash concrete mix with 40% CTW had higher electrical resistivity and reduced water absorption. The environmental sustainability of concrete mixes, as assessed by the CO 2 emissions, was found to be lower by 21.5% in fly ash concrete as compared to reference concrete. With 100% CTW addition, the emission was lowered by 3.8%. The preparation cost for fly ash mix with 40% CTW was 14% less than the reference concrete. As an outcome of this research, the fly ash concrete with 40% CTW can be used with the benefits of improved strength, durability, sustainability, and cost savings. Box–Behnken design (BBD) models were developed to estimate the mechanical properties of the CTW-incorporated fly ash concrete, and excellent correlations were obtained between the predicted and experimental values. Graphical abstract Effect of ceramic tile waste as fine aggregate in 30% fly ash additive concrete