Today is an exciting time for the concrete pavement industry. There are more opportunities and more changes taking place in the construction of concrete than at any time in recent history.
THE 4-R PROGRAM, A NEW MARKET
The big news has come in the 4-R program under the guidelines of the Federal Highway Administration (FHWA)--the restoration, rehabilitation, resurfacing and reconstruction program. Concrete pavements are being restored in imaginative, ingenious ways that are permitting state, county, municipal and airport engineers to increase the years of satisfactory pavement performance at low annual costs.
New construction today usually involves the use of a slipform paver. Slipform machines are used to build pavements for highways, light traffic rural roads, streets, airports and parking areas. They also have been used to place concrete curb and gutter, concrete median barrier, drainage ditch linings and bridge parapets.
CONCRETE PAVEMENT RESTORATION
CPR, an industry label for concrete pavement restoration, includes: pavement patching; joint repairs; cement grout undersealing; joint and crack resealing; restoration of load transfer; and grinding and grooving.
RECONSTRUCTION AND RECYCLING
Many pavements have reached a condition where restoration or resurfacing is not economical or where substantial changes must be made in grade, alignment, ramps or other geometrics. In this case, reconstruction is the logical answer. Concrete recycling is now an accepted method of pavement reconstruction.