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US 8,297,874 B2Granted
Traffic bearing structure with permeable pavement
AssigneeVulcan Materials Company
InventorGerald Krzyzak
Life of this patent
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Abstract
A traffic bearing structure with a permeable pavement includes a subgrade, a base positioned on top of the subgrade, and a wear surface positioned on top of the base. The base includes aggregate compacted in a single lift, where the aggregate in the base includes different sized particles mixed together. The wear surface includes a permeable pavement. The particle size distribution of the aggregate in the base is selected to provide adequate stability and permeability for the permeable pavement.
Claims16
A method for installing a traffic bearing structure comprising:
- (a) preparing a subgrade;
- (b) installing a loose aggregate over the subgrade, where 90 to 100% of the aggregate passes through a 25 millimeter screen, 60 to 90% of the aggregate passes through a 12.5 millimeter screen, 30 to 70% of the aggregate passes through a 4.75 millimeter screen, and 7 to 40% of the aggregate passes through a 1.18 millimeter screen;
- (c) compacting the aggregate into a single lift;
- and
- (d) covering the aggregate with a permeable pavement such that the permeable pavement directly contacts the aggregate.
2 more elements
A traffic bearing structure comprising:
- a subgrade;
- a base including a single lift positioned on top of the subgrade, where the lift includes an aggregate, where 90 to 100% of the aggregate passes through a 25 millimeter screen, 60 to 90% of the aggregate passes through a 12.5 millimeter screen, 30 to 70% of the aggregate passes through a 4.75 millimeter screen, and 7 to 40% of the aggregate passes through a 1.18 millimeter screen;
- and
- a wear surface positioned on top of the lift, where the wear surface includes a permeable pavement selected from the group consisting of block pavers, porous asphalt, and porous concrete.
1 more element
Dependencies are inferred from the claim text.