4.25 How long is the initial setting time of cement? Does it matter if it is poured after the initial setting period? Thank you very much

It usually takes an hour. After initial setting, watering has little effect on strength, but it has an effect on concrete surface. The time when concrete loses plasticity but does not have mechanical strength is called the initial setting time of concrete, and the time when concrete loses plasticity and has mechanical strength is called the final setting time. The initial setting time and final setting time of concrete are very important for concrete construction. When the concrete reaches the initial setting, it means that the concrete has reached the thixotropic limit, which means that the concrete has lost its plasticity, so you can't use vibrators and high-frequency vibrators, and the concrete can't be plastically deformed. This is the limit of concrete construction. Construction cannot be carried out after the initial setting of concrete, otherwise there will be serious strength decline and honeycomb dog holes. The final setting of concrete shows that concrete has the strength to bear a certain load at the beginning.