II. PAVEMENT ENGINEERING AND PAVING MATERIALS

2. FLEXIBLE PAVEMENT

A. ON GOING PROJECTS
1. Studies on Use of Modified Bitumen Binders (P-5 Scheme)
Date of Start:

April 2003
Gujarat Engineering Research Institute, Vadodara, (R)

 

Present Status and Progress
(1) Laboratory Work

Representative sample of modified bitumen by adding Natural rubber, SBS, EVA and aggregates from Sevalia area quarry are collected. Following various tests of Bitumen and Bitumen modifier are carried out in laboratory.
Penetration test (IS:1203)
Softening point (IS:1205)
Ductility test (IS:1208)
Sp. Gravity test (IS:1204)
Elastic Recovery test (IRC:53)
Loss in Marshall stability or retained stability (as per ASTM: D:1559) was carried out with different modified binders.
(2) Field work

Experimental stretches for P-5 scheme were laid on Waghodia - Rustampura road km 23/200 to 25/0 (450 m stretch for each modified binder and control section) during June-2003. Three cycles of performance studies are completed and fourth performance study is in progress.
The study gives an insight in to the behaviour of clayey soils of Kuttanadu under alternate wetting and drying conditions and is relevant for the construction of roads in the area.