30 – 40MM

30 - 40MM

Quality Specification

Name | Group: Sedimentary GREYWACKE
Strength: Strong (50 Mpa – 100 Mpa), broken along fracture plane
Stability : Stable in water – No changes (Grade 1)


This measure is usually used as the base for road body before other materials are applied, it can also be used for rail bearing supports, pipe covers or ballast on the seabed, and cast concrete breakwaters.