Effect of polypropylene fiber on workability and strength of fly ash-based geopolymer mortarRahmad Afriansya, Evelyn Anabela Anisa, Pinta Astuti and Martyana Dwi CahyatiE3S Web Conf., 429 (2023) 05006DOI: https://doi.org/10.1051/e3sconf/202342905006