Preliminary study of the influence of marble dust on clayey soils improvement depending on the characteristics of the natural soil
Preliminary study of the influence of marble dust on clayey soils improvement depending on the characteristics of the natural soil
Some soils are not suitable to support the application of loads or to be used for embankment construction due to their low strength and/or high deformability. However, with proper treatment, these soils can improve their geotechnical properties to fulfil the requirements needed for this use. Building on or with problematic soils usually requires the use of traditional stabilizers like lime and cement which drives up construction and environmental costs. Alternatives have been studied to avoid or reduce these costs associated with soil improvement. Marble dust or Limestone powder obtained as waste from cutting and polishing activities of the natural stone industry has shown great potential in stabilizing expansive soils. Nevertheless, the effect of limestone waste on the properties of the mixed soil depends on the characteristics of the natural soil. In this work, the effect of limestone powder has been studied on three types of clayey soils to evaluate the geotechnical properties of the mixed soil and their relation to some properties of the natural soil such as grain size, plasticity and calcium carbonate content. Preliminary results show that as the addition of limestone powder waste to clayey soils can increase the unconfined compressive strength and the CBR index, reducing the swelling potential of the soil. The level of improvement depends on the type of soil, being influenced by its grain size distribution and mineralogy, although a clear match between parameters has not been obtained.
Erick Gutierrez; Jose Luis Pastor; Miguel Cano; A. Santos; T. Hino
18th European Conference on Soil Mechanics and Geotechnical Engineering (ECSMGE2024)
E - Environment, water and energy
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