Mahvash, S; Lopez-Querol, MS; Jahromi, AB; (2018) Effect of fly ash on the bearing capacity of stabilised fine sand. Proceedings of the Institution of Civil Engineers - Ground Improvement , 171 (2) pp. 82-95. 10.1680/jgrim.17.00036.

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Abstract

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 tests – particle 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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