A Comparison of Optical Gradation Analysis Devices to Current Test Methods--phase 2

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Total Pages : 97 pages
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Book Synopsis A Comparison of Optical Gradation Analysis Devices to Current Test Methods--phase 2 by : Arudi Rajagopal

Download or read book A Comparison of Optical Gradation Analysis Devices to Current Test Methods--phase 2 written by Arudi Rajagopal and published by . This book was released on 2012 with total page 97 pages. Available in PDF, EPUB and Kindle. Book excerpt: Optical devices are being developed to deliver accurate size and shape of aggregate particles with, less labor, less consistency error, and greater reliability. This study was initiated to review the existing technology, and generate basic data to determine when and where such devices are appropriate from the standpoint of both economies and performance. The study was taken up in two phases. Phase-1 incorporated a review of the existing devices for gradation analysis. Following a review of available optical devices, an optical device called Computerized Particle Analyzer (CPA) was selected for laboratory evaluation to determine its suitability for gradation analysis. This device examines particles as they freely fall in front of a light source, while a camera capable of making 10,000 scans per second captures 2-D images. Aggregate samples were collected from 46 different sources in Ohio. These sources included various sizes of lime stone and gravel with varying amounts of crushed faces. Gradation tests were first performed according to standard ASTM/AASHTO procedures. The samples were then tested in CPA. The results of the tests showed that the maximum difference between the test results was less than 1%.

A Comparison of Optical Gradation Analysis Devices to Current Test Methods

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ISBN 13 :
Total Pages : 97 pages
Book Rating : 4.:/5 (798 download)

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Book Synopsis A Comparison of Optical Gradation Analysis Devices to Current Test Methods by : Arudi Rajagopal

Download or read book A Comparison of Optical Gradation Analysis Devices to Current Test Methods written by Arudi Rajagopal and published by . This book was released on 2012 with total page 97 pages. Available in PDF, EPUB and Kindle. Book excerpt: Optical devices are being developed to deliver accurate size and shape of aggregate particles with, less labor, less consistency error, and greater reliability. This study was initiated to review the existing technology, and generate basic data to determine when and where such devices are appropriate from the standpoint of both economies and performance. The study was taken up in two phases. Phase-1 incorporated a review of the existing devices for gradation analysis. Following a review of available optical devices, an optical device called Computerized Particle Analyzer (CPA) was selected for laboratory evaluation to determine its suitability for gradation analysis. This device examines particles as they freely fall in front of a light source, while a camera capable of making 10,000 scans per second captures 2-D images. Aggregate samples were collected from 46 different sources in Ohio. These sources included various sizes of lime stone and gravel with varying amounts of crushed faces. Gradation tests were first performed according to standard ASTM/AASHTO procedures. The samples were then tested in CPA. The results of the tests showed that the maximum difference between the test results was less than 1%.

A Comparison of Optical Gradation Analysis Devices to Current Test Methods--phase 1

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ISBN 13 :
Total Pages : 36 pages
Book Rating : 4.3/5 (555 download)

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Book Synopsis A Comparison of Optical Gradation Analysis Devices to Current Test Methods--phase 1 by : Arudi Rajagopal

Download or read book A Comparison of Optical Gradation Analysis Devices to Current Test Methods--phase 1 written by Arudi Rajagopal and published by . This book was released on 2006 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Optical devices for gradation analysis are being developed to deliver accurate gradation results with, less labor, less consistency error, and greater reliability. The goal of this study was to conduct a review and develop comprehensive understanding of the existing technology for gradation analysis, and generate basic data to determine when and where such devices are appropriate from the standpoint of both economies and performance. Following a review of available optical devices, an optical device called Computerized Particle Analyzer (CPA) was selected for laboratory evaluation to determine its suitability for gradation analysis. This device has been designed to examine particles as they freely fall in front of a light source, while a sophisticated camera capable of making 10,000 scans per second captures images. Aggregate samples were collected from 46 different sources in Ohio. These sources included various sizes of limestone and gravel with varying amounts of crushed faces. Gradation tests were first performed according to the standard AASHTO procedure. The samples were then tested in CPA. Preliminary test results revealed that the CPA device has the potential to produce gradation results comparable to the traditional ASTM and AASHTO procedures. The device is capable of producing consistent and repeatable test data. It is computer-controlled and user-friendly. Two primary benefits noted during the evaluation are: (i) time savings, and (ii) generation of additional information. One gradation test can be completed in less than five minutes, compared to 30 to 60 minutes for the conventional procedure. More importantly, the same data can also be used to obtain additional information about elongation index and angularity. While the results so far show promise, a definitive determination of the suitability of the device for use in Ohio will require further research.

Standard Methods for the Examination of Water and Wastewater

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ISBN 13 :
Total Pages : 1254 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Standard Methods for the Examination of Water and Wastewater by : American Public Health Association

Download or read book Standard Methods for the Examination of Water and Wastewater written by American Public Health Association and published by . This book was released on 1981 with total page 1254 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Scientific and Technical Aerospace Reports

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ISBN 13 :
Total Pages : 292 pages
Book Rating : 4.:/5 (3 download)

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Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1992 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt:

NBS Special Publication

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ISBN 13 :
Total Pages : 456 pages
Book Rating : 4.F/5 ( download)

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Download or read book NBS Special Publication written by and published by . This book was released on 1968 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Publications of the National Institute of Standards and Technology ... Catalog

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ISBN 13 :
Total Pages : 452 pages
Book Rating : 4.:/5 (31 download)

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Book Synopsis Publications of the National Institute of Standards and Technology ... Catalog by : National Institute of Standards and Technology (U.S.)

Download or read book Publications of the National Institute of Standards and Technology ... Catalog written by National Institute of Standards and Technology (U.S.) and published by . This book was released on 1985 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Publications of the National Bureau of Standards ... Catalog

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ISBN 13 :
Total Pages : 356 pages
Book Rating : 4.:/5 (42 download)

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Book Synopsis Publications of the National Bureau of Standards ... Catalog by : United States. National Bureau of Standards

Download or read book Publications of the National Bureau of Standards ... Catalog written by United States. National Bureau of Standards and published by . This book was released on 1972 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Catalog of National Bureau of Standards Publications, 1966-1976

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ISBN 13 :
Total Pages : 1120 pages
Book Rating : 4.:/5 (31 download)

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Book Synopsis Catalog of National Bureau of Standards Publications, 1966-1976 by : United States. National Bureau of Standards

Download or read book Catalog of National Bureau of Standards Publications, 1966-1976 written by United States. National Bureau of Standards and published by . This book was released on 1978 with total page 1120 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Energy Research Abstracts

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ISBN 13 :
Total Pages : 834 pages
Book Rating : 4.3/5 (129 download)

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Download or read book Energy Research Abstracts written by and published by . This book was released on 1990 with total page 834 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Applied Mechanics Reviews

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ISBN 13 :
Total Pages : 934 pages
Book Rating : 4.:/5 (31 download)

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Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1987 with total page 934 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Diagnosis and Management of Glaucoma

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Publisher : JP Medical Ltd
ISBN 13 : 9350255782
Total Pages : 682 pages
Book Rating : 4.3/5 (52 download)

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Book Synopsis Diagnosis and Management of Glaucoma by : R Ramakrishan

Download or read book Diagnosis and Management of Glaucoma written by R Ramakrishan and published by JP Medical Ltd. This book was released on 2013-01-30 with total page 682 pages. Available in PDF, EPUB and Kindle. Book excerpt: Glaucoma is an eye disease in which the optic nerve is damaged and can permanently damage vision and lead to blindness if left untreated. This book is a complete guide to the diagnosis and management of glaucoma. Divided into five sections, it begins with an introduction to the disease, continuing step by step through its diagnosis, the different types of glaucoma and treatment options. Authored by specialists renowned in their field based in India and the USA, this manual contains 840 images and illustrations.

Procedures for Testing Color Vision

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Publisher : National Academies Press
ISBN 13 :
Total Pages : 128 pages
Book Rating : 4./5 ( download)

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Book Synopsis Procedures for Testing Color Vision by :

Download or read book Procedures for Testing Color Vision written by and published by National Academies Press. This book was released on 1981-01-01 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Research in Education

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ISBN 13 :
Total Pages : 1288 pages
Book Rating : 4.:/5 (321 download)

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Download or read book Research in Education written by and published by . This book was released on 1974 with total page 1288 pages. Available in PDF, EPUB and Kindle. Book excerpt:

International Aerospace Abstracts

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ISBN 13 :
Total Pages : 988 pages
Book Rating : 4.F/5 ( download)

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Download or read book International Aerospace Abstracts written by and published by . This book was released on 1998 with total page 988 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Technical Abstract Bulletin

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ISBN 13 :
Total Pages : 1048 pages
Book Rating : 4.E/5 ( download)

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Download or read book Technical Abstract Bulletin written by and published by . This book was released on with total page 1048 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Resources in Education

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ISBN 13 :
Total Pages : 1006 pages
Book Rating : 4.U/5 (183 download)

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Download or read book Resources in Education written by and published by . This book was released on 1988 with total page 1006 pages. Available in PDF, EPUB and Kindle. Book excerpt: