Subdivision Surfacing
LDEG Forum Subdivision Surfacing
Subdivision Surfacing
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Subdivision Surfacing
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Subdivision Surfacing
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Subdivision Surfacing
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Subdivision Surfacing
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Subdivision Surfacing
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Subdivision Surfacing
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Subdivision Surfacing
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Subdivision Surfacing First Coat Seals
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Subdivision Surfacing
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Subdivision Surfacing
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Subdivision Surfacing
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Subdivision Surfacing
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Subdivision Surfacing
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Subdivision Surfacing
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Subdivision Surfacing
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Subdivision Surfacing
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Subdivision Surfacing
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Subdivision Surfacing
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Subdivision Surfacing Specification – Quality Control Hold Points • Weed spraying • Pavement Testing • Profile Check • Seal Design and Construction Plan • Street Furniture Protection
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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
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Subdivision Surfacing
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Subdivision Surfacing
Technical requirements
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Subdivision Surfacing
Technical requirements
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Subdivision Surfacing
Acceptance of Treatment
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Subdivision Surfacing
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Subdivision Surfacing
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Subdivision Surfacing
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Subdivision Surfacing
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Single coat
Two Coat
Racked in
Dry Lock
Bitumen
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• Different Penetration grades 180/200 130/150 80/100 60/70 40/50
Binder Is the mixture of bitumen and spraying additives. 1.
Kerosene
2.
Diesel or AGO
3.
Polymer
4.
Adhesion Agents
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
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
• 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
Subdivision Surfacing
2
Subdivision Surfacing
3
Subdivision Surfacing
4
Subdivision Surfacing
5
Subdivision Surfacing
6
Subdivision Surfacing
7
Subdivision Surfacing
8
Subdivision Surfacing
9
Subdivision Surfacing
10
Subdivision Surfacing
11
Subdivision Surfacing
12
Subdivision Surfacing
13
Subdivision Surfacing First Coat Seals
14
Subdivision Surfacing
15
Subdivision Surfacing
16
Subdivision Surfacing
17
Subdivision Surfacing
18
Subdivision Surfacing
19
Subdivision Surfacing
20
Subdivision Surfacing
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Subdivision Surfacing
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Subdivision Surfacing
23
Subdivision Surfacing
24
Subdivision Surfacing
25
Subdivision Surfacing
26
Subdivision Surfacing
27
Subdivision Surfacing
28
Subdivision Surfacing
29
Subdivision Surfacing Specification – Quality Control Hold Points • Weed spraying • Pavement Testing • Profile Check • Seal Design and Construction Plan • Street Furniture Protection
30
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
Subdivision Surfacing
32
Subdivision Surfacing
Technical requirements
33
Subdivision Surfacing
Technical requirements
34
Subdivision Surfacing
Acceptance of Treatment
35
Subdivision Surfacing
36
Subdivision Surfacing
37
Subdivision Surfacing
38
Subdivision Surfacing
39
Single coat
Two Coat
Racked in
Dry Lock
Bitumen
41
42
• Different Penetration grades 180/200 130/150 80/100 60/70 40/50
Binder Is the mixture of bitumen and spraying additives. 1.
Kerosene
2.
Diesel or AGO
3.
Polymer
4.
Adhesion Agents
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
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
• 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
