Soil Stabilization with Cement

Soil Stabilization with Cement

The soil stabilized with cement is known as soil cement. The cementing action is believed to be the result of chemical reactions of cement with siliceous soil during hydration reaction. The important factors affecting the soil-cement are nature of soil content, conditions of mixing, compaction, curing and admixtures used.

The appropriate amounts of cement needed for different types of soils may be as follows:

* Gravels – 5 to 10%
* Sands – 7 to 12%
* Silts – 12 to 15%, and
* Clays – 12 – 20%

The quantity of cement for a compressive strength of 25 to 30 kg/cm2 should normally be sufficient for tropical climate for soil stabilization.

If the layer of soil having surface area of A (m2), thickness H (cm) and dry density rd (tonnes/m3), has to be stabilized with p percentage of cement by weight on the basis of dry soil, cement mixture will beand, the amount of cement required for soil stabilization is given by

amount of cement required, in tonnes
Lime, calcium chloride, sodium carbonate, sodium sulphate and fly ash are some of the additives commonly used with cement for cement stabilization of soil.