The eruption of Mt Pinatubo in the Philippines in 1991 resulted in the deposition of some 5-8 billion cubic metres of volcanic ash over the surrounding area. The ash has been investigated as roadbase and sub-base type material, as a natural pozzolan and as a fine aggregate in bituminous mixes. This paper discusses the basic physical and engineering properties of the ash, locally known as lahar, and presents the results of a laboratory investigation to determine the performance of Hot Rolled Asphalt
(HRA) and Asphalt Concrete (AC) mixes containing lahar.
10th REAAA Conference, Tokyo, 2000. pp. 11
Making good use of volcanic ash in the Philippines.