Fauzan; Rina Yuliet; Kekem Habibillah; Geby Aryo Agista; Eka Juliafad. THE EFFECT OF A COMBINATION OF STEEL FIBER WASTE TYRE AND CRUMB RUBBER ON THE MECHANICAL PROPERTIES OF HIGH-STRENGTH CONCRETE. INTERNATIONAL JOURNAL OF GEOMATE 2023, 25, 238-245.