Generally, it shall be cured after 24 hours in summer and 48 hours in spring and autumn, and the curing time shall not be less than 7 days. It is best to spread sawdust before watering and curing. When watering, spray water with a watering can to keep the sawdust moist.

If slag portland cement is used, the curing time should be extended to14 d. During the curing period, the strength on the surface of cement mortar is less than 5. OMPA, you are not allowed to walk or do other operations on it to avoid damaging the ground.

Extended data

The longer the water curing time, the higher the hydration degree of cement and the greater the irreversible shrinkage of cement. If all cement particles are hydrated, the cement gel generated by them will not only improve the strength of concrete, but also cause great shrinkage, which will cause concrete cracking in severe cases.

Like aggregate in concrete, a certain amount of unhydrated cement particles or other inert substances are needed to stabilize the volume. Therefore, the longer the water curing time, the better. It is obviously wrong to blindly extend the watering maintenance time as "strengthening maintenance". The progress and development of modern cement concrete technology require "timely" water saving.

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