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Accession Number PB2013-102480
Title Comparison of Optical Gradation Analysis Devices to Current Test Methods. Executive Summary Report.
Publication Date Apr 2012
Media Count 2p
Personal Author A. Rajagopal
Abstract The present study was taken up in two phases. Phase-1 focused on a review of devices pertaining to gradation (ASTM C136) tests. The study identified six optical devices. One of them, Computerize Particle Analyzer (CPA) developed by Haver and Boecker became available for investigation. CPA is a photo-optical device which uses 2-dimensional images for measuring the particle size distribution and shape of all dry bulk materials between 40mincrons and 36mm. 46 aggregate samples (sand sized to 25 mm) comprising of limestone, gravel and slag were collected from various sources in Ohio.
Keywords Computerized particle analyzer
Computerized Particle Analyzer (CPA)
Existing technology
Gradation analysis
Laboratory evaluation
Optical devices

Source Agency Federal Highway Administration
NTIS Subject Category 46C - Optics & Lasers
49E - Optoelectronic Devices & Systems
50A - Highway Engineering
50C - Construction Equipment, Materials, & Supplies
62 - Computers, Control & Information Theory
Corporate Author Ohio Dept. of Transportation, Columbus. Office of Research and Development.
Document Type Technical report
Title Note N/A
NTIS Issue Number 1303
Contract Number N/A

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