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1. Government Engineering college, Ajmer
Ajmer-305001(Rajasthan)
CIVIL ENGINEERING
”CONSTRUCTION OF CEMENT CONCRETE ROAD”
PRESENTATION ON SUMMER TRAINING AT PWD AJMER
PRESENTED BY- SHAKTI PRATAP SINGH RATHORE
20CE57

2. CONTENT
 Name and location of work
 P.W.D- An overview
 Introduction
 Types of pavements
 Flexible pavement
 Rigid pavement
 Materials for flexible pavement layers
 Components of flexible pavement
 Conclusion

3. Site details
 TRAINING DURATION-
01-06-2023 TO 15-07-2023 (45 Days internship )
 NAME OF WORK-
Construction of “CONSTRUCTION OF CEMENT CONCRETE ROAD” at parbatpura, Ajmer
 ROAD DIMENSIONS-
LENGTH OF ROAD- 3.0 Km
WIDTH OF ROAD- 7.0 m
 SITE LOCATION-
parbatpura Ajmer (305001)

4.  SITE INCHARGE-
• EXECUTIVE ENGINEER- Mr
• ASSISTANT ENGINEER- Ms Harshita Sinha
• JUNIOR ENGINEER- Ms Gunjan shiromani

5. Public works department?
Government of Rajasthan
 public work department (P.W.D), under the ministry of state government, is the pioneer in construction arena
in our country.
 the P.W.D conducts the construction , improvement, strengthening , renewation and maintenance of road and
bridges.
 Vinod Kumar Singh is the chief engineer of P.W.D in Rajasthan.

6. Introduction
 Roads constitute the most important mode of communication in areas where railways have not
developed much.
 development of country depends on the connectivity of various places with adequate type of road
network.
 India has second largest road network in the world ( over 5.6 million Km at present ) for the purpose of
management and administration, roads in india are divided into the following categories-
• Expressways
• National highways
•State highways
• Major district highways
• Ordinary district highways
• Village highways

7. TYPE OF ROADS LENGTH (IN Km )
Expressways 1208
National highways 101011
State highways 176166
District roads 561940
Other rural roads 4762968
Total length of roads 5603293

8. Types of pavements
A. FLEXIBLE PAVEMENT-
• Have low flexural strength
• load is transferred by gain to gain contact.
• have a lifespan of 15-20 years.
• bitumen is widely used in construction along with aggregate and filler materials.

9. B. RIGID PAVEMENT-
• Design is based on flexural strength or slab action.
• Construction from cement concrete or reinforced concrete slabs.
• Have low repairing cost but completion cost is very high
• Service life could be 30 years or more.

10. Materials for pavement layers
 bituminous binder
 aggregate
- coarse aggregate
- fine aggregate
 soil

11. Components of flexible pavement
• seal coat
• surface coat
• tack coat
• binder course
• prime coat
• base course
• sub- base course
• subgrade

12. A. SUBGRADE-
• It is the compacted soil layer that forms the foundation of pavement system.
• The minimum thickness of subgrade is 500mm for NH, SH and ODR and 300mm for VR.
B. SUB-BASE COURSE-
• Serve as a effective drainage layer of pavements.
• it also sustain lower magnitude of stresses than the base course.
• crushed stone aggregates are often used in GSB layer.

13. C. BASE COURSE-
• Sustains the wheel load stresses disperses through larger area on the GSB layer below
• it enhances load carrying capacity of pavement structure
• prepared as per specifications laid by govt. of India (MORTH)
D. PRIME COAT-
• It is the process of spraying of liquid bituminous binder of low viscosity over a granular surface.
• it penetrates deep into the surface and seal the voids
• consists of 60% bitumen and 40% kerosene

14. E. BINDER COURSE-
• Thin bituminous surface
• prevent the entry of surface water into the pavement layers during the rains
• it helps in distribution of load through larger surface.
F. TACK COAT-
• It is the application of a small quantity of liquid bituminous binder of low viscosity on a primed granular
surface.
• the main objective of tack is to provide adequate interface bond between the receiving pavement surface
and new bituminous layer being overlaid.

15. G. SURFACE COURSE-
• It is thick bituminous surface.
• consists of crushed aggregate and bituminous binder heated and mixed in a hot mix plant at specified
temperature.
• laid with the help of mechanical paver and compacted by rollers.
H. SEAL COAT-
• They are bituminous emulsion sprayed by mechanical spray to seal the top surface.
• it prevent water to penetrate into the surface.
• it protects the top layer from oxidation and wear due to exposure to sun and air

16. Conclusion