Research On The Evaluation Methods For Concrete Pavement Texture

The advantages of the cement concrete pavement with high strength, good stability and good durability make it be used broadly worldwide in the highway construction. With the developing of the construction of cement concrete pavement, the skid-resistance of pavement becomes very important. The texture of the pavement have a closely link with its skid-resistance, but the current evaluation indexes of the pavement texture are very less and the evaluation methods are backward.This paper analyzes the texture characteristics of the cement concrete pavement which have different types, and comprehensive understands the indexes and the evaluation methods for concrete pavement texture. And this paper mainly researches Three-dimensional evaluation technique of the cement concrete pavement, uses a three-dimensional intensive-point-cloud measurement system to gather the three-dimensional coordinates of the pavement surface; and uses MATLAB software to realize the three-dimensional model visualization of the pavement surface; then uses MATLAB software to calculate the MTD and MPD, and realizes extracting the indexes of the macro-texture.For the first time, this paper uses the roughness parameters Ra to evaluate the micro-texture of the Grooving pavement surface. This paper realizes extracting the Ra of the Grooving pavement; verifies the rationality and stability of the Ra through laboratory tests; and studies of the correlation of Ra with BPN and FN; also presents the reference value of the Ra for acceptancing of the pavement quality.