There is a need to improve the measurements of shape characteristics of aggregates and ballast materials used in the construction of road, airfield, and railway track infrastructures. The fundamental shape properties of aggregate and ballast, including form (roundness, flatness, elongation, sphericity), angularity, and surface texture (roughness) have not been accurately quantified because of their irregular and non-ideal shapes. Current developments are shifting from manual and subjective methods towards a more accurate and automated techniques to quantify aggregate shape properties. This paper validates a new flakiness index equation using three-dimensional (3-D) laser scanning data of aggregate and ballast materials obtained from different sources (quarries) in South Africa. The new equation uses volume ratio instead of the traditional mass ratio to determine flakiness index of aggregates and ballast materials. It is concluded that the validated equation can be used with confidence to determine flakiness index of aggregate and ballast materials.
Reference:
Anochie-Boateng, J.K, Komba, J.J and Mvelase, G.M. 2013. Three-dimensional laser scanning technique to quantify aggregate and ballast shape properties. Construction and Building Materials, vol. 43, pp 389-398
Anochie-Boateng, J., Komba, J. J., & Mvelase, G. M. (2013). Three-dimensional laser scanning technique to quantify aggregate and ballast shape properties. http://hdl.handle.net/10204/7112
Anochie-Boateng, Joseph, Julius J Komba, and Gculisile M Mvelase "Three-dimensional laser scanning technique to quantify aggregate and ballast shape properties." (2013) http://hdl.handle.net/10204/7112
Anochie-Boateng J, Komba JJ, Mvelase GM. Three-dimensional laser scanning technique to quantify aggregate and ballast shape properties. 2013; http://hdl.handle.net/10204/7112.
Copyright: 2013 Elsevier. This is the pre/post print version of the work. The definitive version is published in Construction and Building Materials, vol. 43, pp 389-398