Laser Scanning on Road Pavements: A New Approach for Characterizing Surface Texture

Abstract

Abstract:The surface layer of road pavement has a particular importance in relation to the satisfaction of the primary demands of locomotion, such as security and eco-compatibility. Among those pavement surface characteristics, the "texture" appears to be one of the most interesting with regard to the attainment of skid resistance. Specifications and regulations, providing a wide range of functional indicators, act as guidelines to satisfy the performance requirements. This paper describes an experiment on the use of laser scanner techniques on various types of asphalt for texture characterization. The use of high precision laser scanners, such as the triangulation types, is proposed to expand the analysis of road pavement from the commonly and currently used two-dimensional method to a three-dimensional one, with the aim of extending the range of the most important parameters for these kinds of applications. Laser scanners can be used in an innovative way to obtain information on areal surface layer through a single measurement, with data homogeneity and representativeness. The described experience highlights how the laser scanner is used for both laboratory experiments and tests in situ, with a particular attention paid to factors that could potentially affect the survey.

Pürüzlendirme Uygulamasının Kaplama Yüzeyi Makro Dokusu Üzerine Olan Etkisinin Araştırılması / Investigation of the Effect of Gritting Application on Pavement Surface Macro Texture

“…Mega doku, 50 mm ile 5000 mm frekansa ve 0,1 mm ile 50 mm arasında değişen şid-dete sahip sapmalardır ve yol yüzeyindeki büyük ölçekli bozulmaların ve kusurların oluşturduğu dokudur. Düzgünsüzlük ise 500 mm'den büyük dalga boylarını belirtmek için kullanılır [15,18,19].…”

“…Akış-zaman ölçer metodunda belirli bir hacimdeki suyun özelleştirilmiş silindir içerisinden kaplama yüzeyi üzerinde akması için geçen süre ölçülmekte ve bu süreden yola çıkılarak kaplamanın ortalama doku derinliği tahmin edilmektedir. Hacimsel test metotları kullanımlarının basit, düşük maliyetleri ve taşına-bilir olmalarından dolayı en çok tercih edilen metotlardır [15,16,18,22,[27][28][29] …”

Integration of Field and Laboratory Spectral Data with Multi-Resolution Remote Sensed Imagery for Asphalt Surface Differentiation

“…Similar to a laser scanner [26] or digital imaging processing [27,28], used respectively for texture characteristics and sample strain evaluation, spectroradiometrical laboratory measurements can be computed to analyze asphalt physical properties for remote sensing applications.…”

Use of laser interferometry for measuring concrete substrate roughness in patch repairs

“…Next, the reflected light is measured with the aid of a CCD or CMOS sensor. By repeating the procedure for all points on the surface of the object it is possible to obtain their co-ordinates using basic trigonometric equations and construct a 3D point cloud of the surface [17]. Once a 3D model of the surface is obtained, it can be analysed using a number of 3D roughness parameters.…”

“…Finally, over the last 5 years, a number of researchers [16][17][18][19][20] used both experimental and commercial 3D laser scanners based on triangulation method to assess the surface of either asphalt pavements or concrete substrates. They are based on a laser emitter which produces a beam of energy that hits a point on the surface of the object under investigation.…”