TY - JOUR AU - Ahmad Rifa’i, AU - Noriyuki Yasufuku, PY - 2016/12/26 Y2 - 2024/03/29 TI - UTILIZATION OF BANTAK AND MERAPI VOLCANIC ASH FOR POROUS PAVING BLOCK AS DRAINAGE CONTROL IN THE PRAMBANAN TEMPLE YARD JF - GEOMATE Journal JA - INTERNATIONAL JOURNAL OF GEOMATE VL - 12 IS - 31 SE - Articles DO - UR - https://geomatejournal.com/geomate/article/view/1170 SP - 141-146 AB - <p>Ponding area occurred in the main yard of Prambanan Temple during rainfall is very bothering<br>visitor activities. Some improvements have ever conducted but no longer effective. This paper shows the<br>application of porous paving blocks to reduce the puddle. This porous paving block was made using waste<br>materials from Mount Merapi eruption, such as bantak and volcanic ash. Volcanic ash was substituted for<br>cement and bantak would replace the aggregate. Aggregate ratio used on this research is 1:5 and 0,4 for watercement ratio. Characterization testing of porous paving block consists of density, compressive strength,<br>porosity, and coefficient of permeability. The result shows that the optimum mixture of porous paving block<br>is the mixture with 30% volcanic ash, strength capacity 6.05 MPa, porosity 28.4%, and coefficient of<br>permeability 1.93 cm/s or 8 times faster than normal paving block and 18 times faster than the soil of<br>Prambanan Temple yard. The infiltration analysis indicated that runoff level in the main yard of Prambanan<br>Temple is 8.8 cm and ponding time is 3.2 hours. When using normal paving blocks, ponding can be reduced<br>up to 81.6%, however when porous paving blocks was used, the ponding was not occurred because coefficient<br>of permeability of porous paving blocks is faster than intensity rainfall at Prambanan Temple area (1.5×10-3<br>cm/s). From the evaluation of porous paving blocks strength against forklift load shows that total forklift load<br>allowed to work on porous paving blocks is 9 tons’ load.<br><br></p> ER -