Any rock type general fill material that is capable of increasing the load bearing capacity of the subsoil beneath a new road construction. This forms the level directly beneath the sub-base
This forms the level directly beneath the sub-base.This low-cost material serves to both strengthen and protect the road during construction, forming the level directly beneath the sub-base. Capping increases the stability of the foundations prior to subsequent construction layers and prevents water reaching the bound layers. Grading requirements for capping are minimal and undemanding.
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