Khodabandeh, M.A., Kopecskó, K. and Nagy, G. 2023. Collapse potential and ultrasonic pulse velocity of loess soils after treatment with expanded perlite and metakaolin. Acta Polytechnica CTU Proceedings. 45, (Dec. 2023), 45–52. DOI:https://doi.org/10.14311/APP.2023.45.0045.