Engineers Australia

Shrink-swell index from classification tests – Townsville data

John Eckersley


Limited shrink-swell index and corresponding classification test data for Townsville in North Queensland are presented. Rather than attempting to develop best-fit correlations that are accompanied by such scatter as to render the correlations impractical, near-upper bound relationships are developed. The possible relevance of these relationships to other Australian conditions is considered by way of limited comparison with other published data, and some comments are made on the process of assessing shrinkage index for Site Classification. No attempt is made to develop a statistically rigorous approach, but to suggest some preliminary (and hopefully – intuitively reasonable) directions.