A highway is any public or private road or other public way on land. It is used for major roads, but also includes other public roads and public tracks: It is not an equivalent term to controlled-access highway, or a translation for autobahn, autoroute, etc. In North American and Australian English, major roads such as controlled-access highways or arterial roads are often state highways (Canada: provincial highways). Other roads may be designated "county highways" in the US and Ontario. These classifications refer to the level of government (state, provincial, county) that maintains the roadway. In British English, "highway" is primarily a legal term. Everyday use normally implies roads, while the legal use covers any route or path with a public right of access, including footpaths etc. The term has led to several related derived terms, including highway system, highway code, highway patrol and highwayman. The term highway exists in distinction to "waterway".

1. BY
K.RAMESH
14L41A0107
A TECHNICAL PRESENTATION
ON
Highway Network
System

2. Content
 INTRODUCTION
 MODERN SOIL STABILIZATION TECHNIQUES
 USE OF FLY ASH IN CONCRETE
 RETAINING WALLS
 NEW TECHNIQUES IN PAVEMENT
 CONCLUSIONS
 REFERENCES

3. INTRODUCTION
 A highway is a public road, especially a major road connecting
two or more destinations.
 Any interconnected set of highways can be variously referred
to as a "highway system", a "highway network", or a "highway
transportation system”.
 The history of highway engineering gives us an idea about the
roads of ancient times.

4. MODERN SOIL STABILIZATION TECHNIQUES
 CTB (CEMENT TREATED BASE)
 According to the PCA (Portland Cement Association), CTB (Cement
Treated Base) has provided economical, long lasting pavement foundation.
These structures have combined soil and/or aggregate with cement and
water which compacted to high density.
Unstabilized Granular Base
Cement-Treated Base

5. COMPOSITION AND CONSTRUCTION
 The mixture shall be composed of existing sub-grade, base
course and surface course materials, and/or an imported soil
aggregate, with Portland cement and water added.

6. MATERIALS
 WATER:Water used in mixing or curing shall be clean and
free from injurious amounts of oil, salt, or other deleterious
substances.
 CEMENT: Fly ash may be used as a partial replacement for
the cement. Replacement amounts, not exceeding 25% by
weight, shall be determined through trial batch investigations
using the specific materials proposed for the project.

7. USE OF FLY ASH IN CONCRETE
 Fly ash is one of the residues generated in combustion, and
comprises the fine particles that rise with the flue gases.
 Ash which does not rise is termed bottom ash.
 In an industrial context, fly ash usually refers to ash produced
during combustion of coal.

8. RETAINING WALLS
 A retaining wall is a structure designed and constructed to
resist the lateral pressure of soil when there is a desired change
in ground elevation that exceeds the angle of repose of the soil.
 The active pressure increases on the retaining wall
proportionally from zero at the upper grade level to a
maximum value at the lowest depth of the wall.

9. TYPES OF RETAINING WALLS

10. NEW TECHNIQUES IN PAVEMENT
 ASPHALT CHIP SEALS
 ASPHALT EMULSION SEALCOATS
 ASPHALT SLURRY SEALS
 ASPHALT SURFACE COATINGS

11. CONCLUSIONS
 Traditionally highways were used by people on foot or on
horses.
 Later they also accommodated carriages, bicycles and
eventually motor cars, facilitated by advancements in road
construction.
 In the 1920s and 1930s many nations began investing heavily
in progressively more modern highway systems to spur
commerce and bolster national defense.

12. REFERENCES
 www.google.com
 www.wikipedia.com
 www.studymafia.org

13. Thanks