Drying time problem of plastering mortar on wall and its solution

1. Drying time on the wall refers to the time from the beginning of the mortar to the wall until it reaches a certain level of water absorption and is slightly hardened to be smoothed.
2. The drying time of the upper wall is related to the water absorption of the wall; the humidity of the environment; the water retention of the mortar; and the setting time of the mortar.
3. The working principle of wet mortar is: the water reducing agent provides the smoothness and water retention of the mortar; the conditioner prevents the hydration of the cement in the mortar and quickly loses the effect of preventing hydration when the mortar receives a little water. The mortar immediately Will hydrate and harden. If the mortar has been unable to collect water, the mortar can only be hydrated normally when the initial setting time is reached.
4. In actual construction, there are several situations:
(1) The wall humidity is normal and the air humidity is normal, and the construction thickness is within 2cm. In this case, the drying time of the mortar on the wall is normal, the same as the mortar mixed on site. The opening time of the mortar is adjusted to 20 o'clock in the evening, which can meet the requirements of most construction sites without the problem of long drying time.
(2) The wall humidity is very high or the air humidity is very high or the construction thickness exceeds 2cm. In this case, the drying time of the mortar on the wall will be slightly longer, one to three hours longer than the mortar mixed on site. The opening time of the mortar is adjusted to 20 o'clock in the evening, which can meet the requirements of most construction sites and will not cause the problem of too long drying time.
(3) The wall humidity is very high and the air humidity is very high, and the construction thickness exceeds 2cm. The drying time of the mortar on the wall will be very long, and the mortar will not start to dry until it reaches the setting time. The following measures can be taken to deal with it: First, it is recommended