In the use of accelerating agent, a lot of precautions are you must know, the following is the accelerating agent manufacturers for everyone to explain the use of accelerating agent to pay attention to the problem: please do not add this product in the material mixing, because the stone, sand contains a lot of water, the accelerating agent in a short period of time water absorption; When the accelerating agent is not sprayed, it will decompose its accelerating components, affect the setting time, reduce the strength of concrete, and lead to the bad effect of shotcrete.