Surface preparation generally takes one of two forms Preparing the subgrade and granular base course for new pavementThis can involve such activities as subgrade stabilization over excavation of poor subgrade applying a prime coat or compacting the subgrade
Get Price
Tack Coat Costs A recent Asphalt Institute investigation showed the cost of tack coats on new or reconstructed facilities was 01 02% of the total project costs On the mill and overlay projects tack coat was 10 20% of those project costs If a bond failure occurred and the remedial action was needed
Get Price
specific gravity of 13 Requires 2 applications * If the project uses the FP 03 calculate quantity based on area and use this value in your estimate because the FP 03 pays for the water to dilute
Get Price
Trackless Tack formally specified as NTSS 1HM is a proprietary emulation tack coat developed by Blacklidge Emusions which is used to bond asphalt pavement layers/lifts together Since the inception of tack coats others in the industry have always used the same products and construction procedures developed decades ago Not at Decker
Get Price
TACK COAT A tack coat of asphalt (usually emulsified asphalt) is applied to ensure bond between the existing surface and the asphalt overlay It should be applied in an even thin coat at a rate of application of 05 gallons per square yard with a tolerance of01 gallons per square yard Excessive tack coat can cause slippage or can flush to the
Get Price
Buncombe County where emulsions were used as tack coat had higher occurrence of such distresses compared to Rutherford County where PG64 22 binder was used as tack coat In addition to use of tack coats the asphalt mixes in these counties were prepared by an intermittent purging of baghouse fin
Get Price
Aug 01 2016· Home Asphalt Why Tack Coats Improve Parking Lots and Why Tack Coats Improve Parking Lots and Driveways and compact it to a thickness of 225 to 3 in and then tack
Get Price
Best Practices For Full Depth Repair Tack Coat and Longitudinal Joint Construction Greg Harder PE Regional Engineer Asphalt Institute NJ Asphalt Paving
Get Price
sufficient thickness and the tack coat not properly applied; ii) moisture saturation in the asphalt surfacing could cause premature deformation RD/GN/033 The Use of Waterproofing Membranes on Concrete Bridge Decks Page 1 of 8 measures on site are provided for reference
Get Price
HG Meigs LLC for 70 years has been a midwest supplier of bituminous products including Asphalt Cements to Asphalt Cutbacks and Asphalt Emulsions We also have our own dedicated truck fleet with distributor trucks available for customer emulsion applications Explore our
Get Price
If the prime coat consists of an emulsion the quantity to be paid for will be determined in accordance with Standard Specification Section 101572 (see Method of Measurement in Tack Coat The quantity will be rounded to the nearest 10 gallons 4082 Materials Inspection for Sec 408
Get Price
a tack coat of neoprene modified asphalt adhesive Below the setting bed a concrete or asphalt base should be placed on an aggregate subbase The thickness of base and subbase and materials should be based on the application and subgrade conditions
Get Price
a Is the tack or prime coat specified (Spec reference)? YES NO b The tack coat shall be uniformly applied to a prepared clean surface of all contact surfaces including all pavement layers pavement edges curbing gutters manholes and other structur The tack coat shall not be applied to wet pavement surfaces or when the
Get Price
the indicated thickness based on the dimensions neat lines or pay Asphaltic prime and tack coats pavement reinforcing fabric and seal coat will not be measured separately for payment but will be considered included in the square yard measurement for the asphaltic concrete 32 12 16 Asphalt Paving
Get Price
Apr 16 2014· Application of tack coat to an existing pavement surface is so simple and inexpensive that its real importance is often overlooked Normally considered an incidental expense tack coat material
Get Price
For example a total of 3 inches may be placed in two layers each 15 inches thick when compacted A good way to pave a 4 inch pavement is to first place about 3 to 4 inches of loose asphalt and compact it to a thickness of 225 to 3 inches and then tack the surface and
Get Price
SECTION 4002 SEAL COAT Article 21 Description The Work under this Section consists of the performance of all Work required for the construction of a seal coat of asphalt cement and cover aggregate on RAP strip paved and gravel surfac Article 22 Asphalt
Get Price
TACK SEAL OR BOND You Make The Call Introduction & History Importance of Bond Between Layers Thick application of asphalt/good seal Can help with reflective cracking (SAMI) 14 Non Tracking Tack Coat Author Jerry Peterson
Get Price
The refinery was never built but VDOT has stayed with emulsified asphalts (asphalt cement liquefied by suspending it in water) for surface treatment (chip seal) slurry seal tack and prime applications ever since Is a prime coat necessary? At one time it was thought that a prime coat was an essential element of good pavement construction
Get Price
TACK COAT Refer to page 5 A tack coat of asphalt (usually emulsified asphalt) is applied to ensure bond between the existing surface and the asphalt overlay It should be applied in an even thin coat at a rate of application from 002 to 007 gal/yd2 for asphalt residue Excessive tack coat can cause slippage or can flush to the surface
Get Price
Tack coat application should result in a thin uniform coating of tack coat material covering approximately 90% of the pavement surface (Flexible Pavements of Ohio 2001) To achieve this result application rate will vary based on the condition of the pavement receiving the tack coat
Get Price
What is the purpose of a prime coat and is it necessary on a new paving project? is 4 inches or more in thickness In many instances prime coats are not used even when surface thickness has been as thin as 2 inch According to studies performed by The Asphalt Institute over the last 20 years few if any pavement failures can be
Get Price
Stay Mat Tack Coat can be applied with common sprayer broom mop or squeegee Stay Mat will set up under good conditions within 30 minutes depending on weather and material coating thickness Do not use if rain is imminent when surface is wet or when temperature is below 50°F
Get Price
TRACKLESS TACK COAT MATERIALS A LABORATORY EVALUATION FOR PERFORMANCE ACCEPTANCE Trenton M Clark PE Former Asphalt Program Manager ia Department of Transportation Todd M Rorrer Assistant Asphalt Program Manager ia Department of Transportation Kevin K McGhee PE Associate Principal Research Scientist
Get Price
After the subsequent compaction is carried out the coat would be interlocked with the bituminous materials On the other hand care should be taken to ensure that excessive coat would not be laid otherwise slippage or shear cracks in the bituminous material would occur due to the relative thick layer of the tack coat applied
Get Price
