Abrasiveness of particles measured by cone-fit analysis(CFA);Abrasive-water.jet (AWJ) studies;Assessing the role of particle shape and scale in abrasion using 'sharpness analysis' - Part 1: technique development;Hardness measurement of particulate matter -comparison between experimental and estimation;Instantaneous photographic observation of abrasive water suspension jets (influence of abrasive particle on jet structure)