If you are in the construction phase, your best bet would be to place insulation above the RCC lintel and then cover it with the normal mud / tile protection. However, if you are already finished with your roof protection and now intend to put a wooden false ceiling, I would suggest that put in a exhaust fan in the gap between the RCC and your false ceiling.
Dont forget to leave an air inlet also because the exhaust fan will not be able to perofrm without it. Dont forget to cover the exhaust outlet and air inlet properly to guard against lashing rain and winds. Otherwise lashing rain water will come in through the hole and ruin your false ceiling, be it wooden or gypusm.
A gap of 1 to 1.5 feet between RCC and false ceiling would be effective. Use the exhaust for about two hours after sunset to draw the heat out from the gap, otherwise the heat accumulated between the gap would tend to come into your room through the wooden / gypusm false ceiling. A second exhaust fan below the false ceiling would help in force circulation of fresh air when needed.
As I mentioned in my earlier posts, I have placed jumbolon insulation over the RCC lintel plus have installed a false ceiling to minimize heat entering into the rooms. I also installed exhaust fans between the RCC slab and false ceiling, but because of effective insulation I never got to actually use the exhausts. Moreover I had to take a good deal of measures to stop lashing rains coming in through the exhaust fans holes.
This year during the hottest of days (47 degrees) my room remained cool for 3 hours without AC during power cut-offs, thanks to the 3 layers of jumbolon. It is expensive but pays in the long run. With one inverter AC 1.5 tonnes, running as long as the power is coming, my bill this summer hasnt exceeded rs 11,000 a month. But remember, I have insulation between the walls and double glazed UPVC windows as well.