Ceramic Waste Powder as a Partial Substitute of Fly Ash for Geopolymer Concrete Cured at Ambient Temperature

Abstract

The growth of the construction industry has expanded the demand for ceramic building products such as ceramic tiles, which constitute essential building materials. Nonetheless, a huge quantity of waste powder is produced during the polishing of ceramic tiles. The disposal of ceramic waste powder is a key environmental concern that needs to be properly addressed. The purpose of this research is to evaluate the potential of recycling ceramic waste powder as a geopolymer binder. The main objective consists of exploring the impacts of two types of ceramic waste powder (vitrified tiles and wall tiles) on the partial substitution of fly ash in geopolymer concrete. For this, concrete was prepared under ambient conditions without oven curing. Slump, compressive strength, split tensile strength, and modulus of elasticity tests were performed to measure the workability and the mechanical properties of the geopolymer concrete. Its durability was evaluated through water absorption and sorptivity tests. The microstructural behavior was investigated using scanning electron microscopy and X-ray diffraction measurements. The investigation revealed that a 15% partial replacement of fly ash by wall-tile ceramic waste powder in geopolymer concrete gave similar compressive strength, a 3% increase in tensile strength, and a 7% improvement in the modulus of elasticity. Partial replacement of fly ash with 15% vitrified ceramic waste powder reduced sorptivity and improved the microstructure of geopolymer concrete. The findings revealed that ceramic waste powder can be used to replace 10–15% of the fly ash in M35 grade structural geopolymer concrete, which can be cured under ambient conditions. Doi: 10.28991/CEJ-2022-08-07-05 Full Text: PDF

Effect of Different Ceramic Waste Powder on Characteristics of Fly Ash-Based Geopolymer

“…Similar research revealed that partial replacement of 15% fly ash by ceramic wall tile waste powder in geopolymer concrete provided similar compressive strength, increased split tensile strength by 3%, and increased elastic modulus by 7%. These findings suggest that ceramic waste powder can be used to replace 10-15% of fly ash in M35-grade structural geopolymer concrete, which can be cured under ambient conditions [21]. In addition to tile waste, red clay brick waste can also be used as a precursor to geopolymers.…”

High temperature and abrasion resistance of fly ash and ceramic waste powder based geopolymer mortar

“…Industrial wastes, such as y ash, GGBS, rice husk ash (RHA), and ceramic waste, are rich in silica and alumina. These wastes can be utilized as geopolymer binders (Bhavsar and Panchal, 2022;Memiş and Bılal, 2022;Nath and Sarker, 2014;Saranya et al, 2019). These binders are mixed with alkaline activators, like Na 2 SiO 3 (NS) and NaOH (NH), for geopolymer concrete (GPC).…”