13 Purposes & Basic Principles of Soil Stabilization
The process of improvement of the stability or bearing power of soil by the use of controlled compaction, proportioning and or the addition of suitable admixture or stabilizer is known as soil stabilization.
Purposes of Soil Stabilization
Soil stabilization is practiced in road construction with one or more of the following objectives:
1. To improve the strength of sub-base, base and in the case of low-cost roads, surface course.
2. To reduce the construction cost of roads.
3. To make the locally available soil and other inferior materials usable.
4. To improve the undesirable properties of soil such as excessive swelling or shrinkage, high plasticity etc.
5. To control dust.
6. To increase the load-bearing capacity.
7. To reduce Frost weakness.
8. To reduce settlement of soil.
9. To improve permeability characteristics.
Basic Principle of Soil Stabilization
The basic principles in soil stabilization may be stated as-
⇰ Evaluation of the properties of a given soil.
⇰ Deciding the method of supplementing the lacking property.
⇰ Designing the stabilized soil mix for proposed stability and durability values.
⇰ Considering the construction procedure by adequately compacting the stabilized layers.