Bob Malphurs

I know that there are differences in grades of asphalt and the one best for RC has a smaller aggregate and maybe more sand content.

Anyone have more info on this ? Perhaps a grade number or other description?

Brian Bosley

iTrader: (13)

Supposedly there is a "grade f" that everyone uses that the 2010 worlds track just repaved with and it's great.

I will talk to a couple friends with tracks with a very similar asphalt so I will get back to you if there is something more specific than that. Don't seal it, and don't sugar water it.

CanyonCarverR1

iTrader: (13)

Talk to Billy at Speedworld, he repaved his track recently that the traction is awsome.

rcfoolz

iTrader: (22)

when doing research for making my track, I was told that "S3" grade asphalt was the best. The same that they use on tennis and basket ball courts.

THEBIGBULL

iTrader: (5)

[B]BLACK is good[B] Seriously though, contact a local reputable asphalt contractor, As some one posted a fine sandy mix as used on parking lots tennis courts and play grounds should be the best. The finer a mix is and the higher the oil content will yield a smoother tighter surface. It would not be as durable as a coarser road mix. Good luck!!!

quietstorm76

iTrader: (12)

bump

Bob Malphurs

Thanks for the advice! We're meeting with county officials soon and they are saying they're willing to foot the bill for the asphalt, drivers stand and lights in a county park. How kool is that!

BTW....it's in the Atlanta area.

drfritz

Sounds like somebody has black mail photos of one or more of the county officials doing something they should not be doing.. way to go!!!
skate parks are the only thing they do in these parts....

JetMD

iTrader: (1)

We're working on doing the same thing here in Richmond, VA. They haven't said no yet, but they haven't said yes either. Keeping our fingers crossed!

_Hier_

iTrader: (19)

Coming from someone who used to pave asphalt and run a quality control lab for our company.

In Nebraska we have a mix called "SPL", which is used mostly in parking lots and temporary areas. It is what our local track was paved with.

Each area of the country will have different grades due to the limited supply of materials in the area. Basically they will use what ever is around and cheap. Now the STATE DOT requires certain standards for highways and interstates.

Look for a total A/C (ASPHALT CEMENT) content of 5.75% (+/- .25%).
Our SPL mix was made up of:
5%-AC oil
5%-1/2" Limestone- mined from quarries
28%-47b Gravel- mined from riverbed areas (3/8" and smaller round rock)
10%-Sand- Fine sand
40%-Recycled Asphalt millings (helps cost since their is usually about 4% oil achieved from recycle millings)
12%-Screenings- product of mining limestone (dusty limestone about 1.7% dust)

totals 100%



Not sure what they have for mixes in GA.

Becareful when requesting to use recycled asphalt millings because a lot of companies will mix dirty shitty millings in to get rid of them.


There is alot that goes into a mix... But take this into consideration...

You want it smooth and about 4.5" thick. (2 lifts... 4" bottom lift + 2" top lift... Compaction is roughly 1/4" per Inch of asphalt. Will give you 4.5" compacted.)

Less Oil usually will cause the Asphalt to break up quicker.
More Oil will help prevent cracking.
TOO much Oil will cause major issues.

Crown your track for water run off.


Your traffic is no where close to real life so your track should hold up excellent with a parking lot mix.


Quick Info for you....

kcrunchone

iTrader: (1)

I can look into some of my notes from when dealing with the asphalt company but 5-10 % oil is a must and the finest grade sand as well. Those are the 2 biggest qualities that give you long lasting great traction, in the beginning tire wear is high but will get better. Your main concern is long term virtually maintenance free care by that I mean less cracks and asphalt maintenance as possible.

Tennis court grades are usually a bit more pricey but longer lasting.

rpoage

iTrader: (2)

Avoid any mixes with sea shells in it. This is a common mix near the coasts and while it may add a lot of durability it can shave tires down like no bodies business.