INCREASED PROPERTIES OF VITRIFIED GLASS-CERAMICS FLY ASH WITH THE ADDITION OF 30 WT.% ALUMINUM SILICATE AND SINTERING TEMPERATURE. JTV [Internet]. 2025 Jan. 21 [cited 2025 Aug. 18];3(1):116-21. Available from: https://jtv.itp.ac.id/index.php/jtv/article/view/198