37th Annual Rocky Mountain Asphalt Paving Conference February 25, 2010 Greg Milburn
|
|
- Sabrina Jordan
- 5 years ago
- Views:
Transcription
1 WAR ON CRACKS New Generation Paving Fabrics 37th Annual Rocky Mountain Asphalt Paving Conference February 25, 2010 Greg Milburn
2 Overview What causes cracks Why treat cracks Which cracks to treat Preventative crack reflection techniques Crack sealing/crack surfacing Paving Fabric SAMI (Stress absorbing membrane interlayer) Sawed relief joints
3 at causes cracks Overview y treat cracks ich cracks to treat ventative crack reflection techniqu rack sealing/crack surfacing aving Fabric AMI (Stress absorbing membrane nterlayer) awed relief joints
4 What Causes Cracks Thermal expansion/contraction (working) Change in HMA volume due to temperature changes Fatigue (non-working) Longitudinal wheel path Alligator Age hardening/oxidation of binder
5 Why Treat Cracks? Cracks are inevitable and neglect leads to accelerated cracking and potholing, further reducing pavement serviceability. (FHWA-RD )
6 Prevent water/incompressible intrusion Extends pavement life Can delay more expensive rehabilitations Protects base/subbase layers Original cracked AC
7 Prevent water/incompressible intrusion Extends pavement life Can delay more expensive rehabilitations Protects base/subbase layers New AC overlay Original cracked AC
8 Prevent water/incompressible intrusion Extends pavement life Can delay more expensive rehabilitations Protects base/subbase layers New AC overlay Original cracked AC
9 Prevent water/incompressible intrusion Extends pavement life Can delay more expensive rehabilitations Protects base/subbase layers New AC overlay Original cracked AC
10 Prevent water/incompressible intrusion Extends pavement life Can delay more expensive rehabilitations Protects base/subbase layers New AC overlay Original cracked AC
11 Prevent water/incompressible intrusion Extends pavement life Can delay more expensive rehabilitations Protects base/subbase layers New AC overlay Original cracked AC
12 Prevent water/incompressible intrusion Extends pavement life Can delay more expensive rehabilitations Protects base/subbase layers New AC overlay Original cracked AC
13 Glass Fiber Reinforced Paving Fabric Fiberglass grid bonded to a non-woven paving fabric For use in repair of both flexible & rigid pavements Provides moisture barrier High strength at very low strains Asphalt binder applied: gal/sy
14 Glass Fiber Reinforced Paving Fabric If application on milled surface 1/4 inch difference between adjacent ridges & valleys Difficult to install around tight radii May be problematic if milled Approximate tensile strength: 500 lbs/in ultimate & 300 2% strain Approximately 5 $/sy (installed)
15 Glass Fiber Reinforced Paving Fabric
16 Glass Fiber Reinforced Paving Fabric
17 Glass Fiber Reinforced Paving Fabric
18 Glass Fiber Reinforced Paving Fabric
19 Glass Fiber Reinforced Paving Fabric
20 Glass Fiber Reinforced Paving Fabric
21 Glass Fiber Reinforced Paving Fabric
22 Glass Fiber Reinforced Paving Fabric
23 Glass Fiber Reinforced Paving Fabric
24 Glass Fiber Reinforced Paving Fabric
25 Glass Fiber Reinforced Paving Fabric
26 Glass Fiber Reinforced Paving Fabric
27 Glass Fiber Reinforced Paving Fabric
28 Glass Fiber Reinforced Paving Fabric
29 Glass Fiber Reinforced Paving Fabric
30 Asphalt Reinforcement Grid Fiberglass grid For use in repair of both flexible & rigid pavements Not for use on milled surfaces High strength at very low strains Drainable Pressure sensitive adhesive or lightweight scrim
31 Asphalt Reinforcement Grid
32 Asphalt Reinforcement Grid
33 Asphalt Reinforcement Grid
34 Asphalt Reinforcement Grid
35 Asphalt Reinforcement Grid
36 Asphalt Reinforcement Grid
37 Asphalt Reinforcement Grid
38 Asphalt Reinforcement Grid
39 Asphalt Reinforcement Grid
40 Asphalt Reinforcement Grid
41 Asphalt Reinforcement Grid
42 Asphalt Reinforcement Grid
43 Asphalt Reinforcement Grid
44 Asphalt Reinforcement Grid
45 Polyester/Fiberglass Paving Mat Non-woven matrix of Fiberglass & polyester fibers For use in repair of both flexible & rigid pavements Provides moisture barrier Non-shrink, non-stretch, high melt temperature
46 Polyester/Fiberglass Paving Mat Asphalt binder applied: gal/sy If application on milled surface 1/8 inch difference between adjacent ridges & valleys Millable & recyclable Approximate tensile strength: minimum 100 psi Approximately 2 $/sy (installed)
47 Polyester/Fiberglass Paving Mat
48 Polyester/Fiberglass Paving Mat
49 Polyester/Fiberglass Paving Mat
50 Polyester/Fiberglass Paving Mat
51 Polyester/Fiberglass Paving Mat
52 Polyester/Fiberglass Paving Mat
53 Polyester/Fiberglass Paving Mat
54 Paving Fabric Challenges Choosing the right fabric for the job Use manufacturer s application charts Type of cracks? Waterproofing?
55 Paving Fabric Challenges Choosing the right fabric for the job Use manufacturer s application charts Type of cracks? Waterproofing?
56 Paving Fabric Challenges Choosing the right fabric for the job Use manufacturer s application charts Type of cracks? Waterproofing?
57 Paving fabric challenges Proper Installation Ensure Manufacturer's representative is present during installation
58 Paving fabric challenges Proper Installation Ensure Manufacturer's representative is present during installation
59
60
61
62
63 Paving Fabric Challenges Specification Development Permissive or prohibitive Developing performance based specifications
64 Sawed Relief Joints
65 Sawed Relief Joints Used on full-depth asphalt pavements Increases frequency of thermal cracks Minimizes joint movement from pavement temperature cycling Cracks/joints are more easily maintained Ensures smooth ride
66 QUESTIONS