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LDEG Forum Subdivision Surfacing Subdivision Surfacing 2 - PowerPoint PPT Presentation

LDEG Forum Subdivision Surfacing Subdivision Surfacing 2 Subdivision Surfacing 3 Subdivision Surfacing 4 Subdivision Surfacing 5 Subdivision Surfacing 6 Subdivision Surfacing 7 Subdivision Surfacing 8 Subdivision Surfacing 9


  1. LDEG Forum Subdivision Surfacing

  2. Subdivision Surfacing 2

  3. Subdivision Surfacing 3

  4. Subdivision Surfacing 4

  5. Subdivision Surfacing 5

  6. Subdivision Surfacing 6

  7. Subdivision Surfacing 7

  8. Subdivision Surfacing 8

  9. Subdivision Surfacing 9

  10. Subdivision Surfacing 10

  11. Subdivision Surfacing 11

  12. Subdivision Surfacing 12

  13. Subdivision Surfacing 13

  14. Subdivision Surfacing First Coat Seals 14

  15. Subdivision Surfacing 15

  16. Subdivision Surfacing 16

  17. Subdivision Surfacing 17

  18. Subdivision Surfacing 18

  19. Subdivision Surfacing 19

  20. Subdivision Surfacing 20

  21. Subdivision Surfacing 21

  22. Subdivision Surfacing 22

  23. Subdivision Surfacing 23

  24. Subdivision Surfacing 24

  25. Subdivision Surfacing 25

  26. Subdivision Surfacing 26

  27. Subdivision Surfacing 27

  28. Subdivision Surfacing 28

  29. Subdivision Surfacing 29

  30. Subdivision Surfacing Specification – Quality Control Hold Points • Weed spraying • Pavement Testing • Profile Check • Seal Design and Construction Plan • Street Furniture Protection 30

  31. Sealing Specification NZTA P/3 • 1970’s Method Specification • Engineer is responsible for seal design • Shall be180/200 base binder • Hot Cut Back – Kerosene and Adhesion Agent • Engineer handover • Protection of Road Furniture • Shade Air not less than 10ºC 31

  32. Subdivision Surfacing 32

  33. Subdivision Surfacing Technical requirements 33

  34. Subdivision Surfacing Technical requirements 34

  35. Subdivision Surfacing Acceptance of Treatment 35

  36. Subdivision Surfacing 36

  37. Subdivision Surfacing 37

  38. Subdivision Surfacing 38

  39. Subdivision Surfacing 39

  40. Racked in Single coat Two Coat Dry Lock

  41. Bitumen 41

  42. 42

  43. • Different Penetration grades 180/200 130/150 80/100 60/70 40/50

  44. Binder Is the mixture of bitumen and spraying additive s. 1. Kerosene 2. Diesel or AGO 3. Polymer 4. Adhesion Agents

  45. Viscosity The ‘ Viscosity’ of a liquid is it’s resistance to flow. For bitumen binders, we need to reduce it’s viscosity so we can: – pump it. – spray it. We reduce the viscosity by: – Heating 170 C OR – Emulsifying

  46. Environmental / Sustainability “ Approximately 20% of the added kerosene evaporated while being sprayed, and 30% within 2 hours following application.” Page 94 C h i p s e a l i n g i n N e w Z e a l a n d

  47. • ADHESION : bituminous binder, sticks to the surface of a solid body, e.g. chip. It arises through intermolecular attraction between the contract surfaces. • COHESION : the ability of a material to resist , by means of internal forces , the separation of its constituent particles

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