extend its life of the construction cutting blade

construction cutting blade can also help to cool the diamond blade and extend its life. If it is not safe to use water for the electric power source of your angle grinder, you should cut the concrete dry. As dry cutting uses the air as the coolant, after a period of cutting you should release the pressure on the cutting & grinding discs and allow it to rotate freely to let the air cool it. The period can be a few minutes to a few seconds depending on the hardness of the concrete being cut (the harder the concrete, the shorter the cutting period should be).