![Types
• Rapid setting ( surface dressing)
• Medium setting (premixing of6-]CA)
• Slow setting (FA)](https://image.slidesharecdn.com/pavementmaterialsandtesting-150713101350-lva1-app6892/85/Pavement-materials-and-testing-33-320.jpg)
Pavement materials and testing
- 6. CBR test
- 13. Aggregates Tests Test Method Impact Test IS: 2386 Part IV Crushing Test IS: 2386 Part IV Specific gravity IS: 2386 Part III Water absorption IS: 2386 Part III Abrasion Test IS:2386 Part IV
- 14. Bitumen tests Sl.No Tests Test Method Limits Requirements 1 Penetration Test IS: 1203 - 80-100 2 Ductility Test IS: 1208 Min 75 3 Softening Point Test IS: 1205 Min 40 4 Specific Gravity IS: 73-1961 Min 0.97-1.02 5 Flash Point IS: 1209 Min 220
- 15. Crushing test
- 16. Impact test
- 17. Abrasion test
- 18. Flakiness and elongation Index
- 19. Specific Gravity of Aggregates
- 20. Requirements of Bitumen • The bitumen should not be highly temperature susceptible: during the hottest weather the mix should not become too soft or unstable, and during cold weather the mix should not become too brittle causing cracks. • The viscosity of the bitumen at the time of mixing and compaction should be adequate. This can be achieved by use of cutbacks or emulsions of suitable grades or by heating the bitumen and aggregates prior to mixing. • There should be adequate affinity and adhesion between the bitumen and aggregates used in the mix.
- 21. Tests conducted on bitumen • Penetration test • Ductility test • Viscosity test • Float test • Specific gravity test • Softening point test • Flash and fire point test • Solubility test • Spot test • Loss on heating test • Water content test
- 25. Penetration test
- 26. Thin Film oven test
- 27. Ductility test
- 28. Flash and fire point test • The flash point of a material ia the lowest temp at which the vapour of a substance momentarily takes fire in the form of a flash under specified condition of test. • Fire point is the lowest temp at which the material gets ignited and burns under specified condition of test.
- 29. Cutback bitumen • Cutback is defined as the bitumen, the viscosity of which has been reduced by a volatile diluent. • The viscosity of the cutback and rate of which it hardens on the road depend on the characteristics and quantitty of both bitumen and volatile oil used as the diluent. • Cutback bitumens are available in 3 types Rapid curing (RC) Medium curing (MC) Slow curing (SC)
- 30. • RC-2 means it is the rapid curing cutback of grade 2 • RC-0, MC-0, SC-0 are the lowest viscosity cutback bitumen
- 31. Bituminous emulsions • It is the liquid product in which a substantial amount of bitumen is suspended inn a finely divided condition in an aqueous medium and stabilised by means of one or more suitable materials. • These are used in bituminous road constructions, especially in maintenance and patch repair works. It can be used in wet weather even when it is raining. • It is also used in soil stabilization, particularly of sands in desert areas.
- 32. Tests conducted on Emulsion • Residue on sieving • Stability to mixing with cement • Stability to mixing with coarse graded aggregate • Water cement • Sedimentation • Viscosity
- 33. Types • Rapid setting ( surface dressing) • Medium setting (premixing of6-]CA) • Slow setting (FA)