Although the use of lime, fly ash and sodium carbonate in the stabilization of fine grained soils has been extensively investigated, there has been relatively little work done in connection with coarse-grained Iowa soils. The main purpose of this investigation was, therefore, to study the effect of the addition of lime and fly ash upon two coarse-grained soils and a coarse-grained artificial mixture of soil and crushed stone. The effects resulting from using two different types of lime and a trace chemical activator, sodium carbonate, are also evaluated. It was found that gravelly and stony soils can be satisfactorily stabilized with lime and fly ash. For a particular soil, mixtures containing dolomitic lime gave higher densities and greater strengths than those containing calcitic lime. The addition of 0.5 percent sodium carbonate greatly increases the early strength of mixtures. Mixtures of lime, fly ash and soil-gravel tended to produce higher unconfined compressive strengths than those of lime, fly ash and soil-limestone of the same gradation. It is suggested that a certain amount of lime is needed to satisfy the fixation requirements of the soil before becoming readily available for reaction with the fly ash.
Proceedings of the Iowa Academy of Science
©1963 Iowa Academy of Science, Inc.
O'Flaherty, Coleman A. and Davidson, Donald T.
"Stabilization of Gravelly and Stony Soils With Lime, Fly Ash and Sodium Carbonate,"
Proceedings of the Iowa Academy of Science, 70(1), 334-350.
Available at: https://scholarworks.uni.edu/pias/vol70/iss1/58