Abrasive water jet machining of fly ash and metakaolin based geo-polymersMarimuthu Uthayakumar, Ponnambalam Balamurugan, Kinga Korniejenko, Szymon Gądek and Dariusz MierzwińskiMATEC Web Conf., 322 (2020) 01020DOI: https://doi.org/10.1051/matecconf/202032201020