All moulds are made from steel, protected against corrosion. They are specially made for use with the automatic compactor, see automatic marshall compactors.
The three parts of the 4'' compaction moulds can be purchased individually. See spare parts.
4'' moulds are conforming to ASTM D6926 (ex D1559), while the 6'' moulds to ASTM D5581. The compaction on 4'' moulds can also be performed manually.
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