ABSTRACT
ABSTRACT: Cement and lime have traditionally been used as the primary stabilising binders in order to solidify and stabilise materials. However, the complexity of treatment of contaminants in conjunction with the wide variety of contaminants present have made it necessary to study secondary binders which assist or contribute to successful and fast remediation. Such materials include pulverised fuel ash (PFA) and organoclays. This paper concerns an experimental investigation of the use of some of these binders in order to determine their contribution in the development of compressive strength. The main aim was to investigate the effect of the partial substitution of cement with pulverised fuel ash on the compressive strength values. The material used was typical building sand, stabilised using both cement and fly ash alone, and combinations of the two. Stabilisation was achieved using 6% binder consisting of a mixture of cement and fly ash. Six different mixtures were used and the specimens produced by light compaction were tested after 7, 14 and 28 days so as to determine their compressive strength. The results produced were consistent, showing that the processes used were accurate and repeatable.
