Harahap, Farid Muhamad, et al. “THE UTILIZATION OF CONCRETE WASTE AS AN AGGREGATE SUBSTITUTE AND THE ADDITION OF DENIM FABRIC FIBERS ON COMPRESSIVE AND FLEXURAL STRENGTH OF CONCRETE : (AS AN IMPLEMENTATION OF CONCRETE TECHNOLOGY COURSE)”. Jurnal Pensil : Pendidikan Teknik Sipil, vol. 14, no. 2, May 2025, pp. 331-42, doi:10.21009/jpensil.v14i2.53724.