Type 2.5 Road Base (Maintenance Gravel)
One of the important characteristic of the maintenance gravel is the palagonite ingredient within its matrix. It provides a binding agent to the coarser aggregate and following spreading, water addition and rolling it hardens to a very resilient concrete-like product. This allows for a longer life of the road surface and consequent extended time before resealing is required.
This gravel is produced as a bi-product of the Jaw Crusher and/or horizontal impact crusher producing three screened products.
- The oversize > 50 mm fresh product,
- The 25-50 mm partially altered basalt
- The < 25 mm material. 2.5 road base can also be created directly by crushing and screening more altered basalt from the quarry face.
Product files for download: