The determination of the average least dimension of surfacing aggregates by computation
Loading...
Files
Date
Authors
Dumas, B.
Journal Title
Journal ISSN
Volume Title
Publisher
SATC
Abstract
Paper presented at the 20th Annual South African Transport Conference 16 - 20 July 2001 "Meeting the transport challenges in Southern Africa", CSIR International Convention Centre, Pretoria, South Africa.
The Average Least Dimension (ALD)of surfacing aggregates is required for the determination of the quantity of a bituminous product to be sprayed in the case of normal road surface treatments. The ALD is also needed for the calculation of the spread rate of surfacing aggregates. Method TMH1-B18(a), which is based on measuring the least dimension of an aggregate is the reference method for the determination of the ALD in South Africa. The accuracy of the measured ALD method depends on the sampling process, the sample size, measuring equipment, the interpretation of the least dimension, and the fraction of the sample not measured. The computational method TMH1-B18T(b), currently in use, is inaccurate and also does not take full account of the nature of the particle size distribution which has an effect on the estimated measured ALD. The computational method developed, as discussed in this paper, was designed to reduce the error between ALD measured and ALD computed by introducing more factors which will have a significant decreasing effect on the estimated measured ALD error.
The Average Least Dimension (ALD)of surfacing aggregates is required for the determination of the quantity of a bituminous product to be sprayed in the case of normal road surface treatments. The ALD is also needed for the calculation of the spread rate of surfacing aggregates. Method TMH1-B18(a), which is based on measuring the least dimension of an aggregate is the reference method for the determination of the ALD in South Africa. The accuracy of the measured ALD method depends on the sampling process, the sample size, measuring equipment, the interpretation of the least dimension, and the fraction of the sample not measured. The computational method TMH1-B18T(b), currently in use, is inaccurate and also does not take full account of the nature of the particle size distribution which has an effect on the estimated measured ALD. The computational method developed, as discussed in this paper, was designed to reduce the error between ALD measured and ALD computed by introducing more factors which will have a significant decreasing effect on the estimated measured ALD error.
Description
This paper was transferred from the original CD ROM created for this conference. The material on the CD ROM was published using Adobe Acrobat technology. The original CD ROM was produced by Document Transformation Technologies Postal Address: PO Box 560 Irene 0062 South Africa. Tel.: +27 12 667 2074 Fax: +27 12 667 2766 E-mail: doctech@doctech.co.za URL: http://www.doctech.co.za
Keywords
Average Least Dimension (ALD), Road surface treatments, Surfacing aggregates
Sustainable Development Goals
Citation
Dumas, B 2001, 'The determination of the average least dimension of surfacing aggregates by computation', Paper presented to the 20th Annual South African Transport Conference, South Africa, 16 - 20 July.