It all starts after the water reacts, which leads to the material obtaining strength qualities and structure. I will also add that the higher the grade of concrete and the ambient temperature, the faster the setting process will be completed. You should also take into account that at a temperature of 20°C, M200 concrete will begin to set only after 2 hours, and the total setting time of concrete is 4 hours.local concrete contractors wepourwepump.com you can find out everything here!