Pavement Preservation-ODOT Leading the Way

Transcription

1 Ohio Township Association Topics Discussed Pavement Preservation-ODOT Leading the Way ODOT s new pavement preservation program How townships can take advantage of the new changes New specification information How pavement preservation allows townships to spread their budget $ s further Applications Discussed Big Changes to ODOT Coming! Overband Crack Seal---ODOT Spec #423 Mastic Surface Treatments Micro Surfacing---ODOT Spec #421 Cape Seals---light & heavy uses

2 Overband Crack Seal ODOT Spec #423 Overband Crack Seal Type 1 BLOCKED with 18% Rubber Flows to lowest point Can t be put down in Overband Type 2 LIQUID with 5% Polyester Type 3 LIQUID with 7% Polypropylene Type 4 BLOCKED with 2% Polyester Overband Crack Seal - Blocked Overband Crack Seal - Liquid 5,000 lbs. / 7 ft. / lb.. 7,000 lbs. / 5 ft. / lb..

3 Overband Crack Seal Installed Properly Overband Crack Seal Installed Poorly Overband Crack Seal Overband Crack Seal Temperature - 45 degrees and rising Width of Crack 1/4 1 Product Thickness 1/16 1/8 Bandwidth - 5 disc installs 4 wide product City of Columbus, OH Pay Item Pound or Square Yard

4 Overband Crack Seal Mastic Surface Treatment When: 2-4 years after new pavement is installed Result: Additional 5 years pavement service life What is it Components A sprayed on seal with a unique blend of aggregate and polymer to help seal your pavement, arrest oxidation, while extending the life of asphalt or chip seal surfaces Cationic Polymerized Asphalt Emulsion CSS-1HM Single Cut Emulsion at Central Plant.25 gallon 10 lbs./gallon = 2.5 lbs./sy End result more comparable to Micro than Fog Seal Double Application Both Directions in Each Lane Quality Fine Aggregate Silica Sand Dark Color Enhancers Carbon Black Breaking and Setting Additives

5 Benefits Applications -Seals the pavement -Arrests oxidation -Maintains good surface friction -Consistent black color (Aesthetics) -Locks in chip seals and (controls dust -Extremely economical -3-4 year life extension State, County and Townships High-Volume Priority Shoulders Low-Volume General Mainline Chip Seal Seal Rest Stops Local Low-Volume Residential Streets Parks and Cemeteries Large Commercial Parking Lots MST Material Distributor MST Side Panel Protection

6 MST - Handwork Asphalt Surfaces-1 Year Later Chip Seal Surfaces: # 8 Limestone Chip Seal Surfaces: # 9 Limestone Using a smaller aggregate provides a smoother ride for the public

7 Up Close Oxidizing and Raveled Asphalt Before Before After Oxidized and Raveled Asphalt After Older Asphalt with Onyx Residential Subdivision

8 Video After Close up of Mat with Aggregate Micro Surfacing ODOT Spec #421

9 What is it Components A thin, tough Layer of asphalt emulsion designed to help seal your pavement, fill minor rutting, arrest oxidation, and extend the life of an asphalt or chip seal surface Polymerized Asphalt Emulsion Natural Latex Limestone Aggregate 3/8 to P200 s Breaking and Setting Additives Chemical Break and Cure Portland Cement Cohesiveness Benefits Micro Surfacing Seals the pavement Can fill ruts up to 1 Arrest Oxidation / Minor Raveling Provides a tough wearing surface Fast Installation and Cure Time ½ the cost of 1 ½ of asphalt Improves surface friction Newly Installed

10 Micro Surfacing Micro Surfacing minutes Turns Black 1-1 ½ hours Return Traffic Truck Mount Unit Micro Surfacing Micro Surfacing Surface Course Continuous Unit Single Course 18 lbs. /sy Heavy Single Course 20 to 24 lbs. / sy

11 Micro Surfacing Double Course Good Candidate Leveling Course 14 lbs. / sy and Surface Course - 16 lbs. / sy Double Course = 30 lbs./sy Continued After Ohio DOT Preparatory Work Before Ohio DOT Northern Ohio (After)

12 Overband Crack Seal with Micro Surfacing Polymerized Chip Seal with Micro Surfacing Ohio Township Association Micro Surfacing ODOT Spec Acceptance The pavement is free from excessive scratch marks, tears, rippling and other surface irregularities, joints are uniform, neat and provide a smooth transition. Northern Ohio Township

13 Micro Surfacing ODOT Pavement Preservation Study 2010 Chip Seal and Micro Surfacing Study Thin HMA (< 1 ½ ) $66,358/lm 9 Years Micro (4 Lane) $26,350/lm 8 Years Micro (2 Lane) $17,450/lm 9 Years Chip Seal $11,500/lm 3-5 Years Southern Ohio Township Cape Seal What is it A tough wearing surface that combines a chip seal with a micro surfacing treatment Designed to treat pavements that are structurally sound but have a higher level of surface distress.

14 Benefits Can be placed on a #8 or # 9 Stone Provides tough, dense wearing application Creates a great seal Smoother Surface Improves bleeding issues 8 to 10 year life expectancy More economical than a conventional overlay Cape Seal Number 8 stone -1/2 Stone -for more severe cracking -requires more liquid -more expensive -rides rougher -Minimum 20lbs of micro Light Cape Seal Number 9 stone -1/4 Stone -for lighter cracking -requires less liquid -less expensive -rides smoother -Minimum 18lbs of micro Example Candidate Covered with Micro Surfacing

15 Cape Seal---NW Ohio---10 Years Old! Cape Seals vs. Overlay Cost Project Complete in Summer of 2005 Picture taken Summer of 2015 Ohio Township Association Thank you -Tim Herbst -Zack Helm -Ryan Terry