Stabilization of low quality aggregate or soil can be done by mechanical, chemical, electrical or thermal.Chemical stabilization involves addition of cement, lime, fly-ash, bitumen, chemical compounds etc

Two primary methods of soil stabilization

•Mechanical•Chemical or additive

When unsuitable construction conditions are encountered, a contractor has four options;

1.Find a new construction site 2.Redesign the structure so it can be constructed on the poor soil.3.Remove the poor soil and replace it with good soil.4.Improve the engineering properties of the site soils.

Advantages to soil stabilization

Need of Stabilization

Basic ingredients for cemented base/sub-base in pavement

Environmental Benefits of Soil Stabilization

Laboratory Test Requirements

Advantages of Cement Stabilization

Mix design

Cement Stabilization process

Tsunami Affected Area Rehabilitation Project (TAARP)- 1500 Million Grant in

Trincomalee District Funded By ADB-EU

Roads Taken for rehabilitation

1.Trincomalee-Pulmoddai Road (7.0 km - 27.00 km & 27.00-47.5km)

2. Bhogahawatte-Pulmoddai Road (12.00 km-27.55 km).

Road Before Construction Trincomalee-Pulmoddai Road (7.0 km - 27.00 km & 27.00-47.5km)

Road Before ConstructionBhogahawatte-Pulmoddai Road (12.00 km-27.55 km).

Pug mill

Pug Mill

Surface Preparation

Sub base Surface under Preparation for CSB Laying

Sieving the Soils collected from the Gravel Quarry

Spreading Stabilized Gravel

Leveling Stabilized Gravel

CSB Surface is Leveled and Compacted

Leveled & Compacted

Levels and compaction is Carried out on the Completed CSB Surface

Stabilization Process

• 1.Seiving Collected Gravel from Borrow Pit• 2.Seived Gravel is Processed to Pug-mill• 3.Processed Gravel is sent to Stabilization• 4.Gravel Stabilization Process• 5.Stabilized Gravel for Road Work

Sand is Applied on CSB Surface to Maintain Moisture for Curing

Geo-Textiles Laid on CSB Surface to Maintain Moisture for Curing

Primed Surface after Curing

Finished Cement stabilized Road after surfacing Complete

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