why can bitumen laid on a road be driven on almost instantly , however in carparks etc must not be driven on for up to 2 weeks?

Question

We just had bitumen laid in our carpark at work and have been advised not to drive on it for 2 weeks to let it cure , however when they lay it on a road you can drive on it straight away ?

In: Chemistry

Answer 1

Because Roads have 4,000 pound vehicles moving down them, covering hundreds of yards in mere seconds.
Your car park has a few hundred 4,000 pound vehicles sitting in one place for 9 or 10 hours at a time. These will almost immediately start to sink into uncured pavement.