Drainage system of prambanan temple yard using no-fine concrete of volcanic ash and bantak Merapi

This paper focuses on the potential utilization of volcanic ash and coarse volcanic slag for no-fine concrete for drainage structure of Prambanan temple yard. This material produced from volcanic eruption also becomes environmental important issues as waste material if it is not effectively reduced or reused. Coarse volcanic slag is commonly known by local people as Bantak. The experimental study was conducted to determine engineering properties of no-fines concrete materials and discharge capacity of drainage system was calculated to identify the optimal dimensions of the drainage channel. In addition, a numerical analysis was carried out using SAP2000 and Plaxis to control structure stability. Based on numerical and experimental study, the utilization of no-fine concrete from volcanic ash and bantak by using certain mix design can be used as a porous drainage structure. By utilizing the eco-friendly material as structural material, the originality of the building will not be disturbed.