3D Laser Based Measurement of Mineral Aggregate Surface Area for South African Hot-Mix Asphalt Mixtures
3D Laser Based Measurement of Mineral Aggregate Surface Area for South African Hot-Mix Asphalt Mixtures
复制标题
基于 3D 激光的南非热拌沥青混合料矿物骨料表面积测量
DOI：
--
复制
发表时间：
2011
期刊：
影响因子：
--
通讯作者：
E. Tutumluer
中科院分区：
文献类型：
--
作者：
J. Anochie;J. Komba;E. Tutumluer
在过去的几年中，路面工程和建筑中的工程师和研究人员已经做出努力，并继续开发用于精确测量热混合沥青设计中使用的矿物骨料表面积的方法/程序。该过程的困难部分一直是骨料颗粒具有不规则和非理想形状的事实。本文介绍了使用三维（3D）激光扫描为基础的方法来量化的表面性能的矿物骨料在南非的道路路面。激光设备的精度和准确性进行了成功的评估，并利用直接获得的表面积的矿物骨料在五个典型的南非沥青混合料。作为基于激光的测量的应用，沥青膜厚度的五种沥青混合料的计算和比较从当前的Hveem方法计算的膜厚度。很明显，集料颗粒的表面积可以基于激光扫描装置的直接测量精确地确定，并且用于计算集料颗粒表面积的方法对沥青混合物的膜厚度具有显著影响。基于3D激光扫描仪的结果，新的表面积系数开发的粗骨料通常用于南非沥青混合料。
Over the past several years, engineers and researchers in pavement engineering and construction have made efforts, and continue to develop methods/procedures for accurate measurement of the surface area of mineral aggregates used in hot-mix asphalt design. The difficult part of the process has been the fact that aggregate particles have irregular and non-ideal shapes. This paper introduces the use of a three-dimensional (3D) laser scanning based approach to quantify the surface properties of mineral aggregates used in road pavements in South Africa. The laser device was successfully evaluated for precision and accuracy, and utilized to directly obtain the surface areas of mineral aggregates used in five typical South African asphalt mixtures. As an application of the laser-based measurements, the asphalt film thicknesses of the five asphalt mixtures were calculated and compared with the film thicknesses calculated from the current Hveem method. It was evident that the surface areas of aggregate particles can be determined precisely based on direct measurement from a laser scanning device, and that the methods used to compute aggregate particle surface area has significant impact on the film thickness of the asphalt mixture. Based on the 3D laser scanner results, new surface area factors were developed for coarse aggregates typically used in South African asphalt mixtures.