subbase course

For the support of paving materials, a layer of granular material applied to the subgrade in a predetermined depth; provides underpavement drainage and reduces frost damage.

References in periodicals archive ?

These allow semicoke to have potential applications as aggregate of cement-stabilized road base or subbase course construction, and oil shale semicoke would be utilized in large quantities.

Performance Evaluation of Cement-Stabilized Oil Shale Semicoke as Base or Subbase Course Construction Material

DeGroot, "Structural numbers for reclaimed asphalt pavement base and subbase course mixes," Transportation Research Record: Journal of the Transportation Research Board, vol.

Investigation of the Effect of Recycled Asphalt Pavement Material on Permeability and Bearing Capacity in the Base Layer

Ragab estimates that a machine control-equipped grader can achieve volumes of 3,000m3 per day on a subbase course, while Othman notes: "A grader normally goes up to around 1,700m3 or 1,800m3 per day - mainly because the operator needs to repeatedly make sure they are doing the bed correctly.