Netterberg, F.2025-10-232025-10-232025http://hdl.handle.net/2263/104897Papers presented virtually at the 43rd International Southern African Transport Conference on 07 - 10 July 2025.In spite of most of our laboratory test methods having been used for over 70 years some of them remain problematic either in terms of the choice of the method and apparatus or its reproducibility, or both. Those methods discussed are road vs foundation indicators, their origin and when each should be used, the problem of accurately determining the mica and smectite contents of pavement materials, the necessity for using several test methods for aggregate durability and, in all cases, the necessity for using the same or comparable methods to those used to derive the specifications, especially for soluble salts and pH. The problem of stabilization durability is briefly discussed ‒ is it still a problem or just the interpretation of the test results?9 pagesPDFSouthern African Transport Conference 2025Laboratory testingPavementRoadbedArticle