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Isolation Joint b't'n Asphalt and Concrete

Isolation Joint b't'n Asphalt and Concrete

(OP)
Is there a product similar to flexcell that is placed between a concrete structure and new asphalt pavement?

Dik

RE: Isolation Joint b't'n Asphalt and Concrete

Dik - For the uses I'm familiar with asphalt pavement is placed right up to a concrete structure - nothing between them. This is in a warm climate where the asphalt remains reasonably flexible all year. Maybe different in colder regions.

www.SlideRuleEra.net idea
www.VacuumTubeEra.net r2d2

RE: Isolation Joint b't'n Asphalt and Concrete

I agree with SRE that the flexible material between concrete and asphalt is normally....asphalt.

RE: Isolation Joint b't'n Asphalt and Concrete

(OP)
Thanks... its the cold climate I was concerned about.

Dik

RE: Isolation Joint b't'n Asphalt and Concrete

How about some sort of bond break like felt paper?

RE: Isolation Joint b't'n Asphalt and Concrete

(OP)
I went out last night to see what the city does with asphalt to concrete curb and they don't do anything. I think I will avoid a bond breaker and make sure the curb has a tack coat below the asphalt layer (I should have left the typo... I was using a tack cat.)

Dik

RE: Isolation Joint b't'n Asphalt and Concrete

Attack cat? Like the time I had to take our Sammy to the vet?

NYSDOT is specifying hot melt asphalt joint adhesive at top course cold joints, including curb. Upstate NY certainly counts as cold climate.

RE: Isolation Joint b't'n Asphalt and Concrete

Typically we just tack coat for asphalt to concrete interface (curb and gutter, concrete pads, etc.).
Unless for airports, they require a routed joint (after paving) with joint sealer between the two.

RE: Isolation Joint b't'n Asphalt and Concrete

(OP)
Thanks gentlemen...

Dik

RE: Isolation Joint b't'n Asphalt and Concrete

dik...just prime the concrete before asphalt placement. If you transition from asphalt to concrete in the traffic lane slope the concrete at 15-20 degrees off vertical so when traffic rolls over it pushes the asphalt against the concrete

RE: Isolation Joint b't'n Asphalt and Concrete

(OP)
Thanks, Ron... that's what I did... not usually involved with asphalt... but had to repair some roadway that was cut out for access to a concrete wall. Used 4" HL3 over 12" Cmpt Gran 'A'. Should be good for small trucks and passenger vehicles.

Dik

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