Utilization of Spent Coffee Grounds, Waste Glass, and Clay as Raw Materials for Flooring TilesShowna Lee T. Sales, Nikki Philline Ambag, Jabby P. Mondano and Angeilica A. RapalE3S Web Conf., 694 (2026) 04004DOI: https://doi.org/10.1051/e3sconf/202669404004