For example you could try:

Using cold water for mixing

Increasing well graded aggregate content

Using fibers

Carbon nano tube addition

......

Thank you

Heat should be reduced by any hydration retarder in the market.

Thank you

Good question. I agree with Dr. Muhammad S. Elfeky and Dr. Vytautas Bocullo.

Interesting information.

Best approach would be to use pozzolanic admixtures such as Silica Fume, Fly Ash, Ground Granulated Blast Furnace Slag etc as a partial replacement of cement. This is known to reduce the heat of hydration and prevent cracking.

Thank you!