If you are positive that it is asphalt I would not suggest adhering tile directly to the asphalt. If removal of asphalt is not an option I would install a subfloor and use thinset mortar to adhere the tile. Another option (probably the better option) would be to pour a concrete mix over the asphalt. Than use thinset to install the tile. The concrete will incapsolate the asphalt. Asphalt more than likely has oils in it and can be a hazard.
Asphalt moves so much with shrinking and swelling it's rediculous to try. If you really want tile in your carport I suggest you lay a sheet of plastic over the asphalt and apply a layer of concrete on the plastic making sure you frame out the sides to make a solid pad. A self leveling cement like "ardex" on top of the concrete should make a nice surface for tiling. Tile over the cement and you should be fine.
Perhaps, but not guaranteed. Tile is generally much heavier than asphalt or "composition" shingles. If you're concerned, have a roofing contractor to evaluate your roof.
No. Mastic 500 is an asphalt-based preparation. It would be very bad for porcelain tile floors.
Yes, if it is asphalt it will because of the oil in it.
12 inchesmaximum asphalt pavement thickness allowed for an asphalt over soil instalation. 12 inches.
You can get a high gloss floor finish for asphalt tile floors by going to a good home improvement and DIY store such as Lowes. An example of such a product that is available from Lowes is the Zep Commercial 5-Gallon Wet Look Floor Polish.
You can tile over existing tile although it isn't reccomended. You would be safer by removing the tile and then installing the new tile. But, if you wanted to tile over existing tile you would have to make sure all the tile is even and not lose. If the tile is lose or uneven it will caused the new tile and grout to crack or pop out.
The flash point of asphalt is over 200 oC.
12 inches
About $ 1.50 per sq ft over old asphalt.
can tile be placed over river rock