Road structure – process – or apparatus – Process – In situ treatment of earth or roadway
Patent
1996-07-11
1997-12-30
Lisehora, James
Road structure, process, or apparatus
Process
In situ treatment of earth or roadway
427138, E01C 1948
Patent
active
057022011
ABSTRACT:
A method for compensating differential compaction in an asphalt paving mat wherein an asphalt paver has a compaction compensating system that includes a nominal reference, such as an elongate averaging ski, for determining the general profile of the underlying terrain on which a mat of asphalt material is being placed by the paver and a compensating ski for determining localized irregularities of the subgrade and a control system for responsively altering the thickness of the mat being placed by the paver to compensate for differential compaction of the asphalt material such that a generally planar asphalt paving surface is obtained after compaction thereof. Variations of the method include using a stringline for the reference and/or one or two non-contacting sensors for communicating the general profile and localized irregularity determinations of the subgrade to the control system.
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Boyles Alan W.
Macku Charles G.
Cedarapids Inc.
Lisehora James
Schoonover Donald R.
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