Sealcoating Options Sealcoating Options REFINED TAR/ ASPHALT REFINED TAR/ ASPHALT EMULSION EMULSION Blended Sealcoatings Blended Sealcoatings TOPIC TOPIC Introduction. Introduction. How are they made? How are they made? Characteristics. Characteristics. Advantages/ Disadvantages. Advantages/ Disadvantages. Guideline-Mixing, Application. Guideline-Mixing, Application. How to get the best performance. How to get the best performance. Presented by Presented by Girish Dubey Girish Dubey President, STAR, Inc. President, STAR, Inc. NPE, FEB 1, 2008, NASVILLE, TN NPE, FEB 1, 2008, NASVILLE, TN
Sealcoating Options REFINED TAR/ ASPHALT EMULSION Blended Sealcoatings. TOPIC Introduction. How are they made? Characteristics. Advantages/ Disadvantages. Guideline-Mixing, Application. How to get the best performance. Presented by - PowerPoint PPT Presentation
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Introduction.Introduction. How are they made?How are they made? Characteristics.Characteristics. Advantages/ Disadvantages.Advantages/ Disadvantages. Guideline-Mixing, Application.Guideline-Mixing, Application. How to get the best performance.How to get the best performance.
Presented byPresented by
Girish DubeyGirish DubeyPresident, STAR, Inc.President, STAR, Inc.
NPE, FEB 1, 2008, NASVILLE, TNNPE, FEB 1, 2008, NASVILLE, TN
Do Do NotNot Supply a Blended Product Supply a Blended Product if the job demands compliance if the job demands compliance
to a specification. to a specification.
Please NotePlease Note
A. Refined tar (CTPE) sealers meet ASTM 5727-00, A. Refined tar (CTPE) sealers meet ASTM 5727-00, FAA P-625, 627,628, etc.FAA P-625, 627,628, etc.
B.B. Asphalt SEALERS- No specification designed. Asphalt SEALERS- No specification designed. ASTM Specification is pending.ASTM Specification is pending.
Blends were developed in response to refined Blends were developed in response to refined tar shortages as well as escalating prices, in tar shortages as well as escalating prices, in the last 4-5 years.the last 4-5 years.
Asphalt emulsion is used as an extender for Asphalt emulsion is used as an extender for refined tar sealers. refined tar sealers.
Properties are a hybrid of both refined tar and Properties are a hybrid of both refined tar and asphalt emulsions.asphalt emulsions.
In the blends, properties of the larger In the blends, properties of the larger component dominates the overall performance. component dominates the overall performance.
Do not treat the blends in the same manner as Do not treat the blends in the same manner as 100% Refined Tar Sealers.100% Refined Tar Sealers.
1.1. Extends the availabilityExtends the availability of refined tar of refined tar sealers.sealers.
2.2. Improve the performanceImprove the performance of Asphalt of Asphalt Emulsion sealers, especially color fade Emulsion sealers, especially color fade resistance, resistance to chemicals.resistance, resistance to chemicals.
3.3. Reduces the odor and burningReduces the odor and burning (sensation) of refine tar sealers.(sensation) of refine tar sealers.
4.4. Cost reduction-Cost reduction- May be ???May be ???
5.5. Application-Application- Identical to Refined Tar Identical to Refined Tar Sealers. No special material preparation or Sealers. No special material preparation or equipment is neededequipment is needed..
Blended SealcoatingsBlended Sealcoatings INDUSTRY CONSENSUSINDUSTRY CONSENSUS
DISADVANTAGESDISADVANTAGESOF THE BLENDSOF THE BLENDS
Performance Performance not as goodnot as good as of refined tar sealersas of refined tar sealers. .
Reduced resistance to oils, fats, Reduced resistance to oils, fats, petrochemicals, etc. petrochemicals, etc.
Does not last as long.Does not last as long. Limitations with mix designs.Limitations with mix designs.
a. a. WaterWater, max. 25% for blends with 50% , max. 25% for blends with 50% or more of asphalt emulsion in the or more of asphalt emulsion in the
blend.blend.b. b. SandSand- Highly recommended.- Highly recommended.c. c. Two coats- Two coats- Will yield better longevity.Will yield better longevity.
Higher ambient and cure temperaturesHigher ambient and cure temperatures than than CTPECTPE.. Min. 50 deg. F, because asphalt softens Min. 50 deg. F, because asphalt softens and melts at much higher temperature than refined and melts at much higher temperature than refined tar. Refined tar sealers may be applied as low as tar. Refined tar sealers may be applied as low as
INDUSTRY CONSENSUSINDUSTRY CONSENSUSPerformance declinesPerformance declines with with
Increasing proportion of asphalt Increasing proportion of asphalt sealer in the blend.sealer in the blend.
What defines Performance?What defines Performance?
Overall Longevity of the coating.Overall Longevity of the coating.Fade Resistance- Shall stay dark slate Fade Resistance- Shall stay dark slate in color.in color.
Resist attack by oil, grease, Resist attack by oil, grease, petrochemicals, etc.petrochemicals, etc.
Resist attack by oil, grease, Resist attack by oil, grease, petrochemicals, etc.petrochemicals, etc.
2. Apply when ambient 2. Apply when ambient temperature is min 50 temperature is min 50 ° F and ° F and Humidity less than 80 (60% is Humidity less than 80 (60% is preferred).preferred).
3. Be aware that you are using a 3. Be aware that you are using a blended product, not 100% blended product, not 100% refined tar or asphalt-based refined tar or asphalt-based sealer. sealer.
2. Apply when rain is in the 2. Apply when rain is in the forecastforecast for 8 hrs. or on a foggy or humid for 8 hrs. or on a foggy or humid day.day.
3. Apply over gilsonite or chip 3. Apply over gilsonite or chip sealed surfacessealed surfaces..
Blended SealersBlended Sealers are mixtures of refined are mixtures of refined tar and asphalt based sealer.tar and asphalt based sealer.
Developed in response to tar shortageDeveloped in response to tar shortage and escalating prices.and escalating prices.
Used primarily to extend refined tar Used primarily to extend refined tar sealers.sealers.
They have certain advantagesThey have certain advantages but but do not do not matchmatch refined tar sealer in overall refined tar sealer in overall performance and longevity.performance and longevity.
The application is similarThe application is similar to that of to that of identical to refined tar sealers, with the identical to refined tar sealers, with the following variations;following variations;
Mix designs- Dilution, Sand Loadings, Mix designs- Dilution, Sand Loadings, Ambient conditionsAmbient conditions Number of coats.Number of coats.