ABSTRACT
ABSTRACT: The principal aim of this project is to reduce the demand for the extraction and use of primary aggregates and the associated environmental impacts. To monitor the effect of adding Stancombe limestone dust on resilient modulus of the unbound aggregates. 10%, 20% and 30% dust were added to the Stancombe Type 1 road base material and were tested at different moisture contents using triaxial machine. Samples were left air cured for one month, because it was predicted that binding might happen due to high free-lime content of the Stancombe limestone dust. The results show that control samples, which contain no dust, were the strongest at their optimum moisture content and samples containing extra dust had lost considerable amount of their resilient modulus, verifying previous conclusions regarding fine particle negative effects on the behaviour of unbound samples; however, less water content sensitivity of the samples with extra dust amount has been remarked.
