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Tanah Urug
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Definition
Fill soil or backfill material — earth or other soil material used to fill areas, raise grades, or backfill foundations. Tanah urug must be compacted in layers to prevent settling and is often mixed with cement (tanah semen) to increase strength and prevent erosion. Quality of tanah urug directly affects site stability and the longevity of overlying pavements.
Example
An Indonesian building site uses tanah urug compacted to 95% standard proctor density to raise the finished floor level 1 metre above the surrounding terrain — the fill material compacted in 30 cm lifts to prevent differential settlement.