Abstract
In order to study the effect of mixed cementitious materials on the consolidation behavior of soft estuarine soils in South East Queensland, a series of oedometer tests were performed in the geotechnical laboratory. To fulfill the objectives, specimens were prepared with different additive content of stabilizing agents and were cured for 7 and 28 days, in which cement content remained at 10 % while the content of bentonite was varied from 2.5% to 7.5%. The testing results indicate that both cement-treated and cement-bentonite treated samples represented a significant decrease in compressibility compared with untreated samples, in which cement-bentonite mixture shows higher effect on soil stabilization than cement only. However, with the increase of bentonite content, the consolidation behavior of cement-bentonite treated samples did not change consistently which indicates that the effectiveness of cement-bentonite mixture has no linear relationship with the bentonite content and the optimum bentonite content is around 5%.
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