Different “methods and materials” are used by the N.C. Department of Transportation based on different conditions, N.C. DOT spokeswoman Tammy Stewart said.
“And we are always looking at cost effectiveness,” she said.
Stewart said there is a difference between asphalt from an asphalt plant and a rock seal.
“The smoother pavement usually comes from an asphalt plant mix. But recently, with our rock seals, we have applied a slurry mix after the rock seal and this application produces a smoother surface,” Stewart said.
Date posted: December 29, 2010
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