The document discusses soil compaction, explaining its concept as increasing soil unit weight by reducing air voids for construction purposes. It covers factors affecting compaction, types of compaction methods, laboratory tests, and field compaction control techniques. The conclusion emphasizes the importance of soil compaction in enhancing soil strength and stability for urban development projects.

1. presented by
dasthagiri
Soil compaction

2. Table of contents
 1.compaction concept
 2.factors affecting compaction
 3.types of compaction
 4.laboratory compaction tests
 5.field compaction control
 6.conclusion

3. Compaction concept
 Increasing unit weight of soil by reducing air voids in order to make use of
ground surface for development,i.e.buildings,roads etc. by applying a load
over a small area air gets out from unsaturated soil

4. Factors affecting compaction

5. Types of compaction
 Rolling or kneading-most effective for clayey soil
 Vibrating –most effective for nonclayey soil
 Dropping a heavy weight-suitable for both type of soils

6. Moisture content

7. Soil type

8. Compactive effort
 More enery-greater compaction

9. Method of compaction

10. Soil Compaction in the Field:
1- Rammers
2- Vibratory Plates
3- Smooth Rollers
4- Rubber-Tire
5- Sheep foot Roller
6- Dynamic Compaction

11. Laboratory compaction of soil

12. Standard proctor test(light compaction
test)

13. Modified proctor test(heavy compaction
test)

14. Comparision curve

15. FIELD COMPACTION CONTROL
 The field compaction control consists of the
determination of,
1) Dry density
2) Water content
 Measured using core cutter and sand replacement method.
 The degree of compaction achieved in the measured by the
relative compaction, which defined as the ratio, expressed as a
percentage.
 Relative compaction,

16.  Measured using oven drying method.
 In the field water content determined using,
 Sand bath method
 Alcohol method(the calcium carbide method)
 The nuclear method
 Proctor needle method

17. conclusion
 Ultimately compaction is depending on the void ratio of
soil
 Compaction is a factor of practical importance is the
increase of soil strength and stability.
 Now a day in urban area land is one of the most common
problems
 In such case if soil’s engineering property is not up to the
requirement then there is no way without abandon that
project
 So in that case soil compaction can be applied as a one of
the most economic ground improvement
technique.

18. Any queries?