Pindan sand-clay is a collapsible soil that occurs extensively in the Kimberley region of Western Australia. It is typically a low-density material, which may densify under load at high moisture contents. This can result in differential movement within the pavement structure, leading to general unevenness or even failure. This paper reports on laboratory testing to characterise and model the behaviour of pindan sand-clay materials. This paper synthesises recent developments in construction to utilise pindan sand-clay as a structural layer. It covers identification of suitable material, construction protocols, including compaction moisture control and compaction methods, techniques for layering during construction, modified construction quality control techniques, and curing/drying back. The latest results from pavement performance measurements, including FWD results, are given to support the proposed techniques (Author/publisher) For the covering entry of this conference, please see ITRD abstract no. E208431.
Abstract