New Methodology for Shape Classification of Aggregates
New Methodology for Shape Classification of Aggregates
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DOI：
10.1177/0361198105191300102
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发表时间：
2005-01
影响因子：
1.7
通讯作者：
Taleb M. Al-Rousan;E. Masad;L. Myers;Cliff Speigelman
中科院分区：
文献类型：
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作者：
Taleb M. Al-Rousan;E. Masad;L. Myers;Cliff Speigelman
集料形状特征在决定沥青混合料的结构和功能特性方面起着重要作用。一个全面的，统计为基础的细集料和粗集料的形状特征的分析和分类方法。这些特征是形状（粗集料的三维）、棱角性和表面纹理。该方法是通过测量来自广泛来源和不同尺寸的骨料的形状特征的分布而开发的。使用聚类分析确定分类组的限值。新的方法提供了几个优势，在实践中使用的当前方法。它是基于形状特征在总样本中的分布，而不是基于这些特征的平均指数。粗集料形式通过使用颗粒的三维分析来确定，其允许颗粒在扁平、细长或扁平且细长的颗粒之间进行区分。基本梯度和小波方法被用来量化棱角和表面纹理，分别。分类方法可用于评估不同工艺（如破碎技术和混合）对骨料形状分布的影响。它还有助于在形状特征分布的基础上制定骨料规格。
Aggregate shape characteristics play a major role in determining the structural and functional properties of asphalt mixes. A comprehensive, statistically based methodology for the analysis and classification of the shape characteristics of both fine and coarse aggregates is presented. These characteristics are form (three dimensions of coarse aggregates), angularity, and surface texture. The methodology was developed by measuring the distribution of the shape characteristics of aggregates from a wide range of sources and varying sizes. The limits for the classification groups were determined with the use of a cluster analysis. The new methodology offers several advantages over current methods used in practice. It is based on the distribution of shape characteristics in an aggregate sample rather than on average indices of these characteristics. The coarse aggregate form is determined with the use of a three-dimensional analysis of particles, which allows particles to be distinguished between flat, elongated, or flat and elongated particles. The fundamental gradient and wavelet methods were used to quantify angularity and surface texture, respectively. The classification methodology can be used to evaluate the effects of different processes, such as crushing techniques and blending, on aggregate shape distribution. It also lends itself to the development of aggregate specifications on the basis of the distribution of shape characteristics.