Author(s): Tamara Kuzmanic; Matjaz Mikos

Linked Author(s): Matjaž Mikoš

Keywords: Clast morphology; Fluvial abrasion; Dynamic image analysis

Abstract: Mass losses that clasts experience after being subjected to a short-term abrasion process are relatively low but are accompanied by noticeable morphological (particularly textural) changes. Quarried, dolomite aggregate clasts were subjected to several consecutive short-term abrasion cycles (starting from a 10-min cycle). Abrasion cycles were conducted in a micro-Deval apparatus in the presence of water, with the aim to mimic fluvial abrasion. Quarried aggregate material was selected as it was minimally weathered post-exploitation, representing a fresh clast entering fluvial sediment transport after being detached from the bearing rock mass. Before and after each cycle of abrasion, the clasts were weighed and analysed using a dynamic image analyser – Microtrac Camsizer XL and the accompanying PartAn 3D software. The experimental methodology and the methodology for joining data from several repetitions of analysis to a single data set are presented, as well as the joint data analysis. Also, the preliminary results of changes in morphological parameters are presented.

DOI: https://doi.org/10.3850/IAHR-39WC252171192022937

Year: 2022