Four things to watch out for when placing cement pipes
1, pay attention to avoid dampness and hardening
The damp and hardened cement pipe will drop and lose its original strength. Therefore, the rules and regulations should be re-examined and tested according to the test results. Cement that has become wet or agglomerated must be used after sieving. The sieved agglomerates are usually finely ground or plastered after rubbing or grinding. For cement agglomerates that can be touched or pinched immediately, the strength level can be appropriately reduced.
2, pay attention to avoid exposure to quick drying
If the cement pipe or plaster is exposed to sunlight after operation, its strength will decrease with the rapid evaporation of water, so that it is completely lost. Therefore, the ground floor must be cleaned severely and fully wetted before construction; it must be covered up after construction and sprinkled with water according to the rules and regulations.
How to maintain the cement pipe storage process? Pay attention to the cement pipe storage
3. Pay attention to avoid freezing at negative temperature
Assuming that the cement pipe is frozen, the cement pipe cannot stop hydration, and the moisture freezes and shortens, the cement pipe or mortar will be gradually damaged by the deepening from the outside to the inside. Therefore, the construction regulations for winter construction should be strictly followed. 》 Stop construction.
4, pay attention to avoid hot and hot
After setting, the sand cement pipe will lose its strength if it is often under high temperature and heat. This is because calcium hydroxide in the cement pipe will be composed under high temperature conditions; in addition, some aggregates will also be composed or under high temperature conditions. Reduced volume.