1. Water-cement ratio: it is better to control water-cement ratio around 0.4. The larger the water-cement ratio is, the longer the coagulation time of powder accelerating agent is, and the smaller the water-cement ratio is, the shorter the coagulation time is.
2, water reducing agent: because water ash is relatively small, so more choose to participate in water reducing agent to adjust the way of operation, it is necessary to pay attention to the selection of types, as far as possible to prevent the use of water reducing agent with a slow setting effect, choose water reducing agent.
3, concrete placement time: concrete should not be placed for a long time, the placement time is long, slump and other operations will become worse, in order to facilitate the operation of workers will often choose the method of adding water, the formation of concrete water cement ratio of the increase, the strength of the decline, concrete cohesion time becomes longer.
4. Water consumption for concrete mixing: because the liquid accelerating agent contains water, the water contained in the accelerating agent should be deducted when the concrete is mixed. Otherwise, the condensation time may be longer than expected and the early strength is low.
5, because now the domestic liquid accelerating agent is basically all strong alkaline, to pay attention to protection, splash to the skin should be washed in time with water.
6, the liquid accelerating agent factory after the completion of the operation timely clean the pipe and the ejector, to prevent the concrete wall, a long time do not clean the tube block.If the concrete to the palm surface because of the long time after the operation of the decline, the proposal to participate in reducing water agent mix again, prohibit the addition of water to adjust the operation, otherwise it will appear the condensation time is long, low strength phenomenon.If appear condense time to become long, the amount that can add accelerator of right amount.
The application of cement accelerating agent in shotcrete can greatly improve the spraying speed and thickness, increase the strength and reduce the rebound.The cement accelerator enables the concrete to set quickly after being sprayed onto the working surface.
