Hanji cement blanket quality acceptance method and standard

Hanji cement blanket quality acceptance method and standard

general provisions 

1.1 when the average day and night temperature of the construction site is lower than 5 ℃ or the minimum temperature is lower than 0 ℃ for 5 consecutive days, it is necessary to enter the winter construction.

1.2 when the material strength does not reach 60% of the design strength, it shall not be frozen. When the material begins to freeze under the condition of water immersion and freeze-thaw, it shall not be less than 80% of the design strength

Late maintenance and precautions of new cement blanket

1. This material is used in Central China, and its design life is more than 50 years. In order to prolong the service life, it is suggested that the material should be maintained every 5-10 years, and a layer of cement slurry should be brushed on the surface of the material blanket, which can effectively extend the service life of the material.

2. After the strength of the material reaches 10.0MPa, it can bear the load of personnel and light construction machinery.

3. It is not allowed to knock or pull the material after pouring water until the final strength is formed; it is not allowed to knock the material with sharp objects.