This paper presents the results of an experimental investigation carried out to evaluate the effect of fly ash (FA) on fine sand compaction and its suitability as a material for embankments. The literature review demonstrates the lack of research on stabilization of sandy material using FA. The study is concerned with the role of FA content in stabilized soil physical characteristics. The main aim of this paper is to determine the optimum quantity of FA content for stabilization of this type of soil. This is achieved through particle size distribution and compaction (standard proctor) tests. The sand was stabilized with three proportions of FA (5%, 10% and 15%) and constant cement content of 3% was used as an activator. For better comparison, the sand was also stabilized by 3% cement only so that the effect of FA could be observed more clearly. The results were in line with the literature for other types of soil, i.e. as the % of FA increases, reduction in maximum dry density and higher optimum moisture content were observed.
This paper is concerned with the role of fly ash (FA) content in the California bearing ratio (CBR) values of stabilised sandy soil for geotechnical and geoenvironmental infrastructure. A series of laboratory testsparticle size distribution and CBR tests, were performed. The literature review demonstrates the shortage of research on the stabilisation of sandy material with FA. The main focus of this paper is to establish the optimal quantity of FA content for the stabilisation of this type of soil. A total of 14 distinctive variations of stabilised sand is presented, with three different FA content percentages (5, 10 and 15%), three main curing periods, with durations of 1, 2 and 4 weeks, and a constant cement content of 3%. Some samples were treated with only 3 and 5% cement, with no addition of FA, so that the effect of cement on this particular sand could be observed, and the contribution of the FA alone could be understood. The results obtained are in line with the literature for other types of soil.
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