You lose control over the composition of it and the depth of it.
Can you put asphalt on concrete.
When concrete cracks the two pieces of concrete will begin to drift apart allowing more moisture under the slab causing more problems.
When i m frequently asked can i put asphalt over concrete i always say that the simple answer is yes in fact miles and miles of concrete roads are paved over with asphalt every year and concrete can be an excellent stable base material for asphalt pavement.
To explain better what i am doing.
One positive aspect of installing blacktop over concrete is the concrete provides a firm base for the flexible asphalt paving.
It is safe to pave asphalt over concrete.
It is in bad need of a resurfacing.
Can you asphalt over a concrete driveway.
I am just trying to figure out how i can remedy the situation without having to spend more than necessary.
My 40 year old home has a garage where the asphalt floor is badly misshapen and bowed and especially sunken around the concrete foundations.
One way to get a longer lasting asphalt overlay over concrete is to remove and replace just the bad areas of concrete instead of entire concrete slabs.
But this isn t necessarily the case with concrete.
But it s not always the best idea to lay asphalt over concrete.
This method will provide you with a longer lasting driving surface with less maintenance than if you had done an overlay on top of bad concrete.
If you lay asphalt over concrete what you sacrifice is control over the sub grade surface.
Experts who work each day in the blacktop industry refer to blacktop as flexible pavement.
Concrete is a great base material because it is stable and allows for excellent compaction of the asphalt above.
In fact it doesn t make that much difference what concrete is poured over because the material will harden whether it s installed over a compacted base or not.
Asphalt needs to be poured over a compacted surface in order for it to be a durable long lasting surface.
The best thing you can do is remove the old concrete and a foot or two of dirt beneath depending on what s down there lay down some form of moisture barrier back fill.
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In fact many miles of concrete roads are paved over with asphalt every year.
Once you repair the bad areas you can do your asphalt overlay.
It doesn t have near the strength of concrete when you measure them inch for inch.
I have a long.
If you are thinking about whether or not to put asphalt over your existing concrete pavement consider the following factors.
Sub grade material is one of the most important elements of a parking lot that will withstand the test of time.
Discussion starter 1 mar 6 2012.