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The efficacy of the Purdue TPTA to accurately predict field noise levels has been verified by inservice pavement performance. The initial prediction was a 3 dBA reduction at the time of construction over conventional diamond grinding.
The NGCS was conceived as a “manufactured surface” which would result in consistent and predictable properties at the time of construction and throughout its life. Typical OBSI levels associated with the various textures and, to date, the NGCS surface has met the low noise goals and demonstrated the lowest variability in as-constructed results. With the improved lateral stability and hydroplaning resistance afforded by the NGCS texture, there are additional benefits than just noise reduction. As demonstrated by both quiet pavement research efforts, NGCS surfaces also produced the smoothest pavements of any texture evaluated.
The NGCS LITE surface was conceived as an inexpensive renewable texture to augment the NGCS surface over time. Although patterned after a 1960 texture, only a few test sections have been placed and no performance advantage has been demonstrated at this time.
Friction testing of the surfaces over the last nine years has indicated a stable surface with a good frictional resistance. Initial concerns that the flush grind process would produce a low friction surface were not accurate. The grooving used in the NGCS provides similar ribbed and smooth tire test results and enhances hydroplaning resistance.
Currently there are two specifications for construction of NGCS available at the IGGA website: www.igga.net
• NGCS Test Section Construction on New or Existing Roadways (2014)
Concrete diamond grinding removes roadway imperfections caused by construction and/or heavy usage. The immediate result is an improvement in pavement smoothness, surface texture, skid resistance, safety, and noise reduction.
Advantages
- Improved costs over other rehabilitation techniques
- Work is usually conducted during off-peak hours, which shortens lane closure times and minimizes encroachment into adjacent lanes.
- Fewer lane closures (diamond grinding in one lane does not require grinding of the adjacent lane which may have acceptable surface characteristics)
- Eliminates the need for taper (a requirement with overlay alternatives at highway entrances, exits, and side streets)
- Does not affect overhead clearances underneath bridges or hydraulic capacities of curbs and gutters on municipal streets.
Other Services Wegarten Offer
Concrete diamond grinding is often performed alongside other concrete payment preservation and restoration (CPP / CPR) techniques such as:- Full- and partial-depth repair
- Cross stitching
- Dowel bar retrofit
- Slab stabilization
- Joint/crack resealing
- GPS/X- ray concrete testing
Corrective Grinding
Corrective grinding services reliably correct pavement that has been found to be out-of-spec or that experienced a failed ride test. For clients that need surface testing or re-testing, we offer profile testing equipment that uses the latest in pavement surface testing laser technology. After the testing-for-ride is performed, our highly-trained and experienced team can also help clients evaluate the results.
Next Generation Concrete Surface
The NGCS surface is the first new non-porous concrete texture to be introduced in the last 20 to 30 years. It took three years to research and develop, but less than one year to get field test sections constructed. Today, fourteen states have constructed NGCS surfaces and two major state quiet pavement research efforts have evaluated this texture. NGCS sections have been in service for nine years with good results.The efficacy of the Purdue TPTA to accurately predict field noise levels has been verified by inservice pavement performance. The initial prediction was a 3 dBA reduction at the time of construction over conventional diamond grinding.
The NGCS was conceived as a “manufactured surface” which would result in consistent and predictable properties at the time of construction and throughout its life. Typical OBSI levels associated with the various textures and, to date, the NGCS surface has met the low noise goals and demonstrated the lowest variability in as-constructed results. With the improved lateral stability and hydroplaning resistance afforded by the NGCS texture, there are additional benefits than just noise reduction. As demonstrated by both quiet pavement research efforts, NGCS surfaces also produced the smoothest pavements of any texture evaluated.
The NGCS LITE surface was conceived as an inexpensive renewable texture to augment the NGCS surface over time. Although patterned after a 1960 texture, only a few test sections have been placed and no performance advantage has been demonstrated at this time.
Friction testing of the surfaces over the last nine years has indicated a stable surface with a good frictional resistance. Initial concerns that the flush grind process would produce a low friction surface were not accurate. The grooving used in the NGCS provides similar ribbed and smooth tire test results and enhances hydroplaning resistance.
Currently there are two specifications for construction of NGCS available at the IGGA website: www.igga.net
• NGCS Test Section Construction on New or Existing Roadways (2014)
Documents to download: