| dc.description.abstract | The RCC-15 catalyst wastes of oil industry resulted from oil residue burning at the Balongan Unit (UP) VI of PT. Pertamina has been publicly regarded as hazardous and toxic wastes (B3 wastes); hence, evidences are required with specific management. The present research was aimed to identify immobilized heavy metal level within concrete-based roofs added with catalyst waste and additives. In addition, it was also to identify the qualities of concretebased roof in terms of its flexibility strength, water density, and the percentage of optimum catalyst waste addition to develop concrete-based roofs viewed from technical, health and environment aspects. Waste treatment on heavy metals, there fore, was required. One of alternatives conducted, among others, was solidification with the concentration varieties of 10%, 20%, 30%, 40%, and 50% of catalyst wastes within concrete-based roof materials. After physical (flexibility strength and water density) test and TCLP test were conducted, it was found that the most optimum flexibility strength of concrete-based roof involved 10% catalyst addition, namely 13,20 kg/cm² regarded as the second grade quality of roof, and the most optimum TCLP test was 20% catalyst addition with the highest immobilized efficiency, and the concentration of the heavy metal was still bellow the determined standard quality (P.P No 85 of 1999), while for water density test, relative result was found, both on 10-40% of catalyst addition. It was concluded that the percentage of optimum catalyst waste addition within concrete-based roofs development viewed from technical aspect (flexibility strength and water density) and health and environment aspects was 10%. | en_US |
