基于数字图像技术的露石混凝土路面纹理构造抗滑性能

宋永朝¹, 梁乃兴², 闫功喜¹, 杨永前¹

(1.重庆交通大学 交通运输学院, 400074 重庆; 2.重庆交通大学 土木建筑学院, 400074 重庆)



摘要:

为稳定露石水泥混凝土路面高抗滑性能,提出一种基于数字图像技术的露石表面纹理构造分析方法．通过规范数字图像采集过程以缩小露石表面图像信息误差,通过数字图像获取露石表面纹理构造特征,建立像素空间曲面模型,计算露石纹理构造深度．运用图像形态学基础理论,分析二值图像中代表露石颗粒形态的上凸小区域相关参数,计算上凸小区域的数量、面积及大小组成,得到露石表面上凸面积百分数．研究结果表明:露石表面抗滑值与上凸面积百分数呈近似抛物曲线关系,为有效发挥露石表面高抗滑性能,建议露石表面上凸面积百分数控制在［0.5,0.43］,露石纹理构造深度合适区间为［0.58 mm, 1.05 mm］,粗集料粒级对露石表面质量影响显著,4.75～19 mm级配的露石表面具有高抗滑性能．

关键词:  露石水泥混凝土  数字图像技术  纹理构造  上凸面积  抗滑性能

DOI：10.11918/j.issn.0367-6234.2015.02.022

分类号:U416.216

基金项目:国家自然科学基金(51278361)；重庆市自然科学基金(cstc2012jjA30001)；长沙理工大学公路工程教育部重点实验室开放基金(kfj130102).



Skid-resistant performance of texture structure of exposed-aggregate cement concrete pavement based on digital image technology

SONG Yongchao¹, LIANG Naixing², YAN Gongxi¹, YANG Yongqian¹

(1. School of Traffic and Transportation, Chongqing Jiaotong University, 400074 Chongqing, China; 2.School of Civil Engineering and Architecture, Chongqing Jiaotong University, 400074 Chongqing, China)

Abstract:

To stabilize high skid-resistant performance of EACCP, a method is proposed based on digital image technology to analyze texture structure of exposed-aggregate surface. By regulating digital image captured process of asphalt pavement surface, the error of digital image information could be reduced. Texture structure features of exposed-aggregate surface are acquired by means of the digital image. The curved surface model of image pixel space is established to calculate texture depth of exposed-aggregate surface. Utilizing the basic theory of image morphology, the binary image representing texture structure distribution is quantitatively analyzed. Calculating characteristic values of convex regions include number, area and its area ratios. The convex area percentage of exposed-aggregate surface can be contained. The results show that the relationship between convex area percentage and the skid-resistant value of its texture structure is an approximate parabola curve. To achieve high skid-resistant performance, the convex area percentage should be controlled within ［0.5,0.43］. The texture depth should be controlled within ［0.58 mm, 1.05 mm］. The grading characteristics of coarse aggregate has a significant effect on quality level of exposed-aggregate surface. The exposed-aggregate surface with 4.75-19 mm coarse aggregate gradation possesses high skid-resistant performance.

Key words:  EACCP  digital image technology  texture structure  convex area  skid-resistant performance