stabilization

SOIL STABILIZATIONSOIL STABILIZATION

By: Jeric Paraso

What is Soil Stabilization?

DEFINITION:

Chemical or mechanical treatment designed to increase the stability of a soil mass and improve its engineering properties.

PURPOSE OF SOIL STABILISATION:

*strength improvement

*Dust control

*Soil waterproofing

SOIL STABILIZATION TECHNIUES

1) PHYSICAL TECHNIQUES

*Compaction *Altering size distribution

*Drying

A) COMPACTION

*Increases density

*Increases strength

*Reduces permeability

B) ALTERING SIZE DISTRIBUTION:

C) DRYING:

*Performance of soil can be greatly improved by drying in sun or oven

2) PHYSIC0-CHEMICAL TECHNIQUES

Combination of chemical & physical reactions.

Materials known as stabilizers: Lime

Cement

Bitumen

LIME STABILIZATION PROCEDURE.

•Pulverization and scarification •Lime content

•Uniformity of mixing

•Compaction

•curing

LIME-SOIL STABILIZATION USES

* Improve the workability and load-bearing characteristics of soil.

* Used to dry wet soils at construction site.* can substantially increase the stability,

impermeability, and load-bearing capacity of the sub-grade.

Lime

CEMENT STABILIZATION PROCEDURE •Pulverization •Cement content

•Moisture content

•Uniformity of mixing

•Compaction

•Curing.

CEMENT-SOIL STABILIZATION USES

•Cement stabilized soils usually stronger than lime stabilized soils.

•Similar uses to lime stabilized soils.

Portland Cement

BITUMINOUS STABILIZATION:

Refers to a process by which a controlled amount of bituminous material is thoroughly mixed with an existing soil or aggregate material to form a stable base or wearing surface.

Bitumen increases the cohesion and load-bearing capacity of the soil and renders it resistant to the action of water.

Benefits of Bituminous Stabilization

• • Improvements to the driving surface and in safety

• • Virtual elimination of dust problems • • Reduction in the loss of aggregate

Potential Disadvantage to Bituminous Stabilization

• • Potential to induce higher driving speeds and thus, potentially dangerous curves in existing geometry.

Soil Stabilization Equipment

Spreader

Soil Mixers

Compactors

Spreaders

Spreaders

Spreaders

Soil Mixers

Soil Mixers

Soil Mixers

Compactors

Compactors

Compactors