8_Reimschiissel_FAA AI Airport Pavement Workshop Presentation 11-13-12 Denver FINAL ISSA SSWS CON 2-21-13

7/27/2019 8_Reimschiissel_FAA AI Airport Pavement Workshop Presentation 11-13-12 Denver FINAL ISSA SSWS CON 2-21-13

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• Slurry Seal and Microsurfacing

• Pavement Rejuvenation

FAA and AI Airport PavementPreservation Workshop

By Eric M. Reimschiissel

American Pavement PreservationLas Vegas, Nevada



Item FAA P-626 asphalt slurry seal ISSA A105

Item FAA P-635 polymer modified asphaltmicro-surfacing ISSA A-143.

Item FAA P-632 Asphalt Rejuvenation



Runway closures & Notams (notice toairmen)

F.O.D. Foreign object debris

Access to critical areas

Scheduling is critical for airport operations

Escorts for construction equipment

Work closely with airport authorities to coverany possible security concerns





Crack sealing (cracks wider than ¼”)

Herbicide treatment & Vegetation removal

Removal of pavement markings

Removal of tire rubber surface contaminant

Sweeping and cleaning of the surface

Tack coat ( if required)















Normally a tack coat is not required unless thesurface to be covered is extremely dry orraveled. If required, the spray applied tack coat

should consist of one part emulsion and threeparts water. Application rate according to theFAA specifications and engineer approval. Thepavement condition will dictate the amount of

fog seal material required.









P-626 Slurry Seal is a mixture of emulsifiedasphalt (latex modified) mineral aggregateand water properly proportioned, mixed, and

spread on a asphalt prepared underlyingcourse or existing wearing surface.

Slurry seal is a cold mix thin surface overlayapplication applied on an asphalt surface for

the purpose pavement preservation, sealingor surface corrections.

Slurry seal provides a new surfaceapplication



Slurry seals extend the life of an existingsurface

Slurry seals last from 5 to 10 years

Slurry seals preserve the pavement surface Slurry seal can correct some surface

imperfections such as raveling and loss ofsurface fines or fill minor cracking

Slurry seal provides a new surfaceapplication

Slurry seals are a cost effective application



The aggregate shall consist of sound and durablemanufactured sand, slag, crusher fines, crushedstone, or combination thereof. The aggregate

shall be clean and free from vegetable matter,dirt, and other deleterious substances. Inaddition to this the aggregate shall be 100%crushed.

Aggregate shall have a uniform gradation. Type 1 slurry seal is a 1/8 minus aggregate

Type 2 slurry seal is a ¼ inch minus aggregate



Type 1 gradation is used for maximum crackpenetration and is usually used in low densitytraffic areas where the primary objective is

sealing. Type 2 gradation is used to seal and improve

skid resistance. Type 2 slurry seal can correctsome irregular surface conditions

Slurry Seal places a new thin overlaid surface





Slurry seal un-modified anionic or cationic

Slurry Seal can be Latex Modified emulsion.Latex modified emulsions are better for long

term applications and aggregate retention Emulsion to be tested prior to use.



Micro-surfacing

Similar to Slurry Seal but typically thicker

Asphalt Binders are always polymer modified

Used when a faster setting thicker surfaceapplications is required.

Mixes are “stiff,” and can withstand loads withoutdeformation

Can be used in multiple lifts for leveling. Microsurfacing is usually a thicker application than

slurry seal.

Microsurfacing places a new thin overlaid surface



























Construct longitudinal and transverse jointsto be neat appearing and uniform withoutbuildup, uncovered areas, or unsightly

appearance. All joints shall have no morethan ¼” inch (6mm) difference in theelevation when measured across with a 10’straight edge.







The roller, if required, shall be a self-propelled pneumatic-tired roller capable ofexerting a contact pressure during rolling of

50 pounds per square inch (350,000 Newton’sper square meter). It shall be equipped with awater spray system, to be used if the slurry ispicking up on the tires during rolling.











Item FAA P-632 Pavement Rejuvenation

The purpose of the application of theseproducts is the rejuvenation of the upper 3/8 of

an inch of an oxidized or otherwise agedasphalt surface binder without causing anunacceptable reduction in the frictioncharacteristics of the pavement section



• Emulsions are sprayed on the asphalt surfacewith calibrated distributor truck

• Spray applications must be uniform

• Applications rates must be set according to thespecifications and monitored for quality.

• Emulsions to be tested prior to use or certificateof compliance accepted

• Test sections might be required



• Adequate heating capacity

• Positive displacement pump

• Full circulation spray bar that maintains proper

nozzles which provide the specified rate ofapplication of the product.

• Positive shut off

•

Calibrated to the required application chart















Minor to Moderate

Cracks

Severe Cracking







New pavement markings applied toslurry seal and rejuvenation

applications provide a new andbeautiful looking pavement surface







Pavement preservation applications arenecessary for the long term care of asphalt

Pavement preservation is cost effective

Slurry seal and Microsurfacing applications areboth preventive maintenance and correctiveapplications providing a new surface condition

Rejuvenation applications can enhance andextend the life of a pavement surface as well asprovide some crack mitigation



Western Emulsions, Ergon Asphalt Emulsions andCactus Asphalt for providing some projectinformation for this presentation



Documents

8_Reimschiissel_FAA AI Airport Pavement Workshop Presentation 11-13-12 Denver FINAL ISSA SSWS CON 2-21-13