Anochie-Boateng, JosephKomba, Julius JMvelase, Gculisile M2013-11-292013-11-292013-06Anochie-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 389-3980950-0618http://ac.els-cdn.com/S0950061813001918/1-s2.0-S0950061813001918-main.pdf?_tid=67057482-5837-11e3-b7a1-00000aab0f01&acdnat=1385648252_6fbe28cf81bb730f4ceff934f325b060http://hdl.handle.net/10204/7112Copyright: 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 389-398There 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.enFlakiness indexAggregatesBallastShape propertiesLaser scanningPavementsRailways track structuresConstructionBuilding materialsArticleAnochie-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/10204/7112Anochie-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/10204/7112Anochie-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.TY - Article AU - Anochie-Boateng, Joseph AU - Komba, Julius J AU - Mvelase, Gculisile M AB - 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. DA - 2013-06 DB - ResearchSpace DP - CSIR KW - Flakiness index KW - Aggregates KW - Ballast KW - Shape properties KW - Laser scanning KW - Pavements KW - Railways track structures KW - Construction KW - Building materials LK - https://researchspace.csir.co.za PY - 2013 SM - 0950-0618 T1 - Three-dimensional laser scanning technique to quantify aggregate and ballast shape properties TI - Three-dimensional laser scanning technique to quantify aggregate and ballast shape properties UR - http://hdl.handle.net/10204/7112 ER -