Hi , ive just dug out my front lawn for a drive in preperation for some ready mix that i have ordered the measurments are 25 ft x 10ft x 8in ive been told by a freind that due to putting 8in of ready mix in there is no need for hardcore ? i have used scaffold boards so the shuttering can take it , im just looking to get this confirmed that this is ok before delivery next week , would be gratefull for all advise , thanks
Cracking is due to the concrete drying out and shrinking.
If you a laying on soil or whatever, you must either lay a damp proof membrane to stop the water leaching away into the soil or soak the surface well before laying.
Once down, level and trowelled, cover the area with damp sand. Make sure the sand does not dry out, be specially carefull if the temperature rises above 20 degrees centigrade. Make sure the work is protected from rain and frost. If its expected to be below 5 degrees overnight don't lay.
For best results protect for about 10 days.