COBBLES (150-50mm)

(Colour is generally blue-grey, but is subject to variation)

Cobbles are our largest screened material. As can be seen in the photo opposite, there is a large variation in the size of the rocks.

Typically the material is 100% passing the 150mm sieve, with 0% passing the 37.5mm sieve.

Density is roughly 1.2 t/m3.