Bituminous pavement

Bituminous pavement ..
This is our first presentation in our college for bituminous pavement

1. BITUMINOUS PAVEMENT Presented by: Arif Mohd Siddiqui Mohd Uzair Prashant Srivastava Mohd Talib

2. CONTENT Introduction to Bitumen Bituminous Pavement B i t u m i nous r o a d l a y e r . T e s t f o r m a t e r ial . Failures. Advantage and Limitations References.

3. INTRODUCTION TO BITUMEN Semi-solid hydrocarbon product Dark colored Viscous cementitious Adhesive Bitumen (Asphalt) had been utilized since 3500 B.C in building and road construction . Their main uses are as adhesives and water proof agent.

4. It is a produced by removing the lighter fractions (such as liquid petroleum gas, petrol and diesel) from heavy crude oil during the refining process.

5. BITUMINOUS PAVEMENT Bituminous road is a road constructed by using bitumen . It is also called flexible pavement because it changes its shape according to nature of load and sub base. A road or pavement is a structure consisting of superimposed layers of processed materials above the natural soil sub-grade, whose primary function is to distribute the applied vehicle loads to the subgrade . The pavement structure should be able to provide a surface of acceptable riding quality , adequate skid resistance, favorable light reflecting characteristics and low noise pollution.

6. BITUMINOUS ROAD LAYERS

7. Sub-grade Layer of natural soil prepared to receive the stresses from the layers above. Sub-Base course The sub-base course is the layer of material beneath the base course and the primary functions are to provide structural support, improve drainage. Base course The base course is the layer of material immediately beneath the surface of binder course. It may be composed of crushed stone, crushed slag, and other untreated or stabilized materials.

8. Binder course It's chief purpose is to distribute load to the base course The binder course generally consists of aggregates having less asphalt Surface course Surface course is the layer directly in contact with traffic loads and generally contains superior quality materials. They are usually constructed with dense graded asphalt concrete. Prime Coat Prime coat is an application of low viscous cutback bitumen to an absorbent surface It provides bonding between two layers.

9. Tack Coat Tack coat is a very light application of asphalt It provides proper bonding between two layer of binder course It set very fast. Seal Coat Seal coat is a thin surface treatment used to water-proof the surface and to provide skid resistance

10. TEST FOR MATERIAL For bitumen- Grade of bitumen. Percentage of optimum bitumen content. By weight of aggregate. By weight of total mix For aggregate- Strength test. Impact loading test. Abrasion value. Sieve analysis.

11. Sieve analysis for aggregate

12. Recommended Aggregate Impact Test Values

13. FAILURE OF BITUMINOUS PAVEMENT SLIPPAGE CRACKS

14. ALLIGATOR CRACKS

15. LONGITUDINAL CRACKS

16. BLOCK CRACKING

17. ADVANTAGE AND LIMITATIONS Joint less smooth ride surface. Less curing time. Failure gradually. It allows stage construction . Limitations- Less durability. Less tensile strength than concrete. Tendency to become soft and slick in hot weather .

18. R E F R E N C E S www.theconstructor.org nptel.ac.in Highway engineering by S.K.Khanna and Justo Images -www.google.co.in.

19. THANK YOU