Exact consumption rate of power gel micro-silica is specified by performing exact laboratory studies. But usually its consumption rate is equal to %5-%8 of consumed cement. Be careful that for obtaining high compressive resistance and making a powerful concrete, it is necessary to reduce water mixing rate about 20-25 percent prior to add this material. It is also possible to reduce consumed cement in concrete mix the same as adding rate of power gel micro-silica. Excessive consumption of this material may increase the setting time more than normal rate and cause further weakness in hardened concrete.