The document discusses soil stabilization, which is a process that treats soil to maintain or improve its performance for road construction. It involves incorporating additives or blending different soil types to change the soil's properties. The purpose is to improve strength, reduce costs, control undesirable properties like swelling, and increase load capacity and frost resistance while reducing settlement. Stabilization involves evaluating the soil, choosing an effective and economical method based on needed properties, and designing a stabilized soil mix for stability and durability. Methods include mechanical and chemical stabilization using additives like lime, cement, slag, fly ash, and bituminous or resinous materials.

2. SOIL STABILIZATION
Soil stabilization is a process of treating the soil in
such a manner as to maintain, alter or improve the
performance of the soil as a road construction
material. The changes in the soil properties are
brought about either by the incorporation of additives
or by the mechanical blending of different soil types

3. PURPOSE OF SOIL STABILIZATION
To improve the strength of sub-bases, bases and sometimes
surface courses, in case of low-cost roads.
To bring about economy in the cost of road .
To improve the undesirable properties of soil such as excessive
swelling or shrinkage, high plasticity etc.
To control dust.
To increase the load-bearing capacity.
To reduce Frost weakness.
To reduce settlement of soil.

4. COMPONENTS OF SOIL STABILIZATION
Soil
Stabilizing agent
(a) Cement
(b) Lime
(c) Blast Furnace slag
(d) Fly ash

5. STAGES INVOLVED IN SOIL STABILIZATION
PROCESS
1.Evaluation the properties of given soil
2.Deciding the lacking property of soil and choose effective and
economical method of soil stabilization
3.Designing the stabilized soil mix for intended stability and
durability values

6. Types of soil stabilization techniques
Different Technique of Soil Stabilization
Mechanical Stabilization
• Soil-aggregate mixture
• Soil-clay mixture-cement
• Sand –gravel mixture
• Stabiliztion of soil with soft
aggregates
Chemical stabilization
or stabilization by
additives such as
• Lime
• Sodium silicate
• Calcium chloride
• Bituminous material
• Resinous material