subbase
Layer beneath pavement
A subbase is the layer of material beneath a base, particularly in construction.
In road building, the subbase lies between the natural soil and the base course that supports the pavement: The contractor laid gravel for the subbase.
In mathematics, a subbase is a collection of sets that generates a topology through finite intersections and arbitrary unions.
Combined sum total
- gravelLoose small rock fragments
- compactionReducing volume through pressure
- subgradeSoil layer supporting pavement
- roadbedFoundation beneath railway tracks
asphalt · crushed stone · granular · thickness · underlayment · gradation · capping · leveling
Ground matter for planting
- compactionReducing volume through pressure
- drainageLiquid removal system
- stabilizationProcess of becoming steady
- permeabilityAbility to transmit fluids
moisture · density · fill · earthwork · grading · excavation · backfill · geotextile
Underlying support structure
- underpinningFoundational support beneath
- reinforcementAdding support or encouragement
- platformRaised flat structure
- substructureSupporting base beneath
footing · structural · bedrock · bearing · stability · firmness · anchorage · pier
aggregate
Combined sum total
- gravelLoose small rock fragments
- compactionReducing volume through pressure
- subgradeSoil layer supporting pavement
roadbed · asphalt · crushed stone · granular · thickness · underlayment · gradation · capping · leveling · bedding
soil
Ground matter for planting
- compactionReducing volume through pressure
- drainageLiquid removal system
- stabilizationProcess of becoming steady
permeability · moisture · density · fill · earthwork · grading · excavation · backfill · geotextile · tamping
foundation
Underlying support structure
- underpinningFoundational support beneath
- reinforcementAdding support or encouragement
- platformRaised flat structure
substructure · footing · structural · bedrock · bearing · stability · firmness · anchorage · pier · slab
- Road Constructionasphalt, concrete, paving, cement, grading
- aggregatesaggregate, gravel, crushed stone, pea gravel, fine gravel
- roadbedroadbed, trackbed, track bed, railbed, subgrade
- siteworkclearing, grubbing, excavation, earthmoving, earth moving
- gravel pitgravel, sand, pebbles, rocks, stones
- pavingbrick, bricks, asphalt, concrete, pavement