Behaviour of kaolinite and bentonite at elevated and lowered temperatures

![CDATA[Engineering applications which experience a change in the natural ground temperature are increasing. There is an established a link between mechanical behaviour, temperature, and stress history. Some models/relationships have been postulated, however, very few studies have been undertaken to compare and contrast responses based on the distinctive soil compositions. This paper presents some initial investigations into consolidation rate and thermal volume change for kaolinite and bentonite, two distinctive clays. Step loading tests were performed at various overconsolidation ratios, at temperatures between 5 to 50 oC. One temperature cycle from 20 to 50 oC was used to ascertain volume change. A clear influence of temperature on behaviour of both clays was observed, though not always in the same way. Elevated temperatures resulted in an increase in consolidation rate under normal consolidation predictably for both clay materials, however, at high overconsolidation rates, the nature of response appears to be more complex.]]