Use of cement pipe device problems that need attention
Use of cement pipe equipment in everyday life is not common, but in the construction of cement needs pay attention to what? We take a look.
1, often at a high temperature cement hot conditions, there will be loss of strength, so do not be placed in a high temperature cement hot environment.
2, hard knot damp cement will reduce or even lose their original strength, has a group damp or hard knot of concrete, to be screened later use. Prevent moisture hard knot.
3, after the concrete or mortar mix into, if cold, it can not be the cement hydration, the water freezes and expands, the concrete or mortar powder crisp outside to the inside would have been gradually deepened damage to regulate construction.
4, such as concrete or plaster after the operation was exposure, its strength will be reduced, or even completely lost. Therefore, it must be strictly and fully wet cleaning before the construction of grass-roots; after construction should be strictly covered, according to specification water conservation.
5, cement with a hard, clean grass-roots firmly bonded or bond together, but its adhesive bond strength of the grass-roots level and smooth face related. Dirt, greasy, acid and other substances on the grassroots level, will play a role in isolation, it must be carefully cleared washed after the first brush a plain cement paste, add a touch of mortar or poured concrete.