railway RRB JE (CBT I + CBT II) Mock Test 2024 Highway Engineering Highway Materials and Maintenance
Indian Standards classifies bitumen into grades such as 65/25, 85/40 etc. The first and second numbers respectively represent:
1
Flash point and Penetration
2
Penetration and Softening point
3
Softening point and Penetration
4
Flash point and Softening point