UTILIZATION OF BANTAK AND MERAPI VOLCANIC ASH FOR POROUS PAVING BLOCK AS DRAINAGE CONTROL IN THE PRAMBANAN TEMPLE YARD

Authors

  • Ahmad Rifa’i
  • Noriyuki Yasufuku

Keywords:

Bantak, Permeability, Porous Paving Block, Volcanic Ash

Abstract

Ponding area occurred in the main yard of Prambanan Temple during rainfall is very bothering
visitor activities. Some improvements have ever conducted but no longer effective. This paper shows the
application of porous paving blocks to reduce the puddle. This porous paving block was made using waste
materials from Mount Merapi eruption, such as bantak and volcanic ash. Volcanic ash was substituted for
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,
porosity, and coefficient of permeability. The result shows that the optimum mixture of porous paving block
is the mixture with 30% volcanic ash, strength capacity 6.05 MPa, porosity 28.4%, and coefficient of
permeability 1.93 cm/s or 8 times faster than normal paving block and 18 times faster than the soil of
Prambanan Temple yard. The infiltration analysis indicated that runoff level in the main yard of Prambanan
Temple is 8.8 cm and ponding time is 3.2 hours. When using normal paving blocks, ponding can be reduced
up to 81.6%, however when porous paving blocks was used, the ponding was not occurred because coefficient
of permeability of porous paving blocks is faster than intensity rainfall at Prambanan Temple area (1.5×10-3
cm/s). From the evaluation of porous paving blocks strength against forklift load shows that total forklift load
allowed to work on porous paving blocks is 9 tons’ load.

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Published

2016-12-26

How to Cite

Ahmad Rifa’i, & Noriyuki Yasufuku. (2016). UTILIZATION OF BANTAK AND MERAPI VOLCANIC ASH FOR POROUS PAVING BLOCK AS DRAINAGE CONTROL IN THE PRAMBANAN TEMPLE YARD. GEOMATE Journal, 12(31), 141–146. Retrieved from https://geomatejournal.com/geomate/article/view/1170

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