Yuyun Tajunnisa, Ridho Bayuaji, Nur Ahmad Husin, Yosi Noviari Wibowo, and Mitsuhiro Shigeishi, “CHARACTERIZATION ALKALI-ACTIVATED MORTAR MADE FROM FLY ASH AND SANDBLASTING ”, INTERNATIONAL JOURNAL OF GEOMATE, vol. 17, no. 60, pp. 183–189, Aug. 2019.