Buddha Institute of Technology

Project Guide:-Prof. ALAK ROY

Presented By :-1:- Raj Kumar Gupta2:- Sujoy Kumar Vidyanto3:- Vikash Singh4:- Shivakant5:- Rishabh Kumar Srivastava6:- Utkarsh Kumar Tripathi

Design of Highway(Flexible Pavement)

Contents: Introduction Site & Location Site plan Types of pavement Flexible pavement design Wheel load transfer Super elevation Camber Shoulder Krebs Surveying Testing Types of bitumen Drainage system Carriage way Road Environment Road design by IRC-37-2001 CBR test Flexible pavement construction Satallitemap of project Difference Advantages of flexible roads Disadvantages of flexible roads

IntroductionHIGHWAY is a term commanly used to refer a major roads intended for travel by the public between important distinations, such a cities. A hard smooth surface or layer that forms a road carriageway, airfield runway, vehicle park or other paved areas.

Site & Location

NH 28 (BIT to ITM)

Site Plan

Types Of Pavements

Flexible Pavement Design

Wheel Load Transfer

Super elevation

Super elevation Calculation

Where-E=rate of super elevationF=friction factorV=speed of vehicle (m/s)R=radios of curve (m)

Camber

IRC Values for Camber

Surface type Heavy rain Light rainConcrete/Bituminous

2 % 1.7 %

Gravel/WBM 3 % 2.5 %Earthen 4 % 3.0 %

Shoulder

Drainage System

Kerb

Types of Kerbs

Types of Kerbs Low or mountable kerbs:

Height of 10 cm above the pavement edge. With a slope which allows the vehicle to climb over easily

Semi-barrier type kerbs Height is 15 cm above the pavement edge. parking vehicles, but at emergency only.

Barrier type kerbs. Height of 20 cm above the pavement edge With a steep slope.

Submerged kerb. Provide lateral stability

Surveying L-SECTION X-SECTION LEVELLING

L&X Section

Testing Bitumen Testing Aggregate Testing Soil Testing

Bitumen Testing

Penetration test Ductility test

Penetration Test

Determining the Ductility Of Bitumen

Ductility Test

Aggregate Test Aggregate Impact Value Aggregate Abrasion Value

Aggregate Impact Value

- Passing through 12.5mm IS Sieve- Retention on 10mm IS Sieve – - Aggregate impact value

=

Aggregate Abrasion Value

Aggregate abrasion value

We found 10.56% Our abrasion value

in bituminous road should be less than 30%

Design EquationxAxDxF

Where-=The cumulative number of standard axles to be

catered for in the design in the terms of MSAA=Initial traffic in the year of completion of

construction in the terms of numbers of commercial vehicles per day

D= Lane distribution factorF=VDFn= design life in yearsr=Annual growth rate

Available DataA=1698r=0.075F=4.5D=0.75

Calculation of MSA =

= =29591798.91 SA =29.59 MSA

CBR Test

CBR CalculationCBR%=%

Where-X=Unit load on the piston (pressure)Y=Standard unit load (pressure) for well graded crushed stone.

DESIGN OF CRUST THICKNESS

According to IRC37-2001 for designed load 30msa &CBR value 5%-SG GSB (200mm)WMM (250mm)DMM (65mm)BC (40mm)Total =200+250+65+40=555mm

Flexible Pavement Construction

Base and Subgrade Preparation Pavement surface preparation Mix trasport Placement Compaction

Preparation of Sub Grade Preparation of sub grade could include

site clearence , grading, and composition process.

Preparation of sub base( Soiling)

Laying of boulder. Size of boulder 45 – 90 mm (according to

IRC-37-2001). Thickness of sub base 150 mm

( according to design).

Preparation of Base(Bearing)

Laying of boulder. Size of boulder 20-50 mm ( according to

IRC-37-2001). Thickness of sub base 175 mm

( according to design). Compaction. Sprinklimg of water.

Preparation of Surface Sprinking of Binding meterial ( bitumen). Laying the bituminous concrete mix

meterial at 170 to 190*C. Aggregate size 0 to 20 mm. Rolling of surfacing.

Difference Between Flexible and Rigid Pavement

FLEXIBLE PAVEMENT RIGID PAVEMENT

1. Load is transfer by grain to grain.2. Low strength.3. Low life Span.4. High maintenance cost.5. Rolling of surface is needed.6. Damaged by oils and

certain Chemicals.

1. Load transfer is not exists.2. High strength.3. Life span is more.4. Low Maintenance cost.5. Rolling of surface is not needed.6. No damage by oils and

greases.

Advantage of Flexible

1. Easily repair.2. Additional thickness added any

time.3. Smooth.4. Tolerates a great range of

temperature.

Disadvantages of Flexible

Loses some flexibility and cohesion with time.

Needs resurfacing sooner then PC concrete.

Not normally chosen where water is expected.

Thank You