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Use of Lasers for Laboratory Measurements of Aggregate Shape, Angularity, and Texture

项目名称：	Use of Lasers for Laboratory Measurements of Aggregate Shape, Angularity, and Texture
摘要：	Aggregate shape, texture, and angularity are considered crucial for the development of high quality adhesive systems with asphalt binder, and a good quality aggregate skeleton in asphalt and concrete mixtures. These properties are currently measured using the aggregate image measurement system (AIMS), which is based on analyzing images of aggregate samples taken with a digital camera to determine aggregate shape, angularity, and texture. Texas Department of Transportation (TxDOT) owns and operates the current camera-based imaging system. However, the current system may provide misleading results when scanning aggregates of dissimilar surface color. This shortcoming is significant because it may lead to erroneous rankings of materials. In practice, texture measurements are commonly made using lasers for in-service pavements, and for specimens compacted in the laboratory or taken from field sections. Indeed, specifications used in practice to measure texture are based on laser measurements. There is a need to investigate the application of these optical sensors for measuring aggregate profiles to determine shape, angularity, and texture, and to compare these measurements with those from the AIMS and from other advanced scanning techniques to improve the current image analysis method.
状态：	Completed
资金：	671,011
资助组织：	Texas Department of Transportation
项目负责人：	Adams, Joe
执行机构：	Texas A&M Transportation Institute
主要研究人员：	Walker, Roger S
开始时间：	20160101
预计完成日期：	20171231
实际结束时间：	0