Look at the below why waterproof construction needs to be done

Because of the characteristic of the concrete honeycomb structure, determines the buildings, public buildings on its own structure is hard to avoid leaking, and the external environment will also bring the increase of seepage water of building. So some environment worsen the structure of the water leakage, what waterproof system?

Pervasive environment water leakage of three factors:

A: the water

Natural precipitation, groundwater, moisture in the air, building of the steam produced, indoor water supply and drainage, etc

2: the water stress

Gravity, surface tension, air pressure, wind load, capillary effect, hydrostatic pressure

Three: structural cracks

Macroscopic fracture (visible to the naked eye, and the crack width is greater than 0.05 mm)

1, the structure of the actual working condition and the design model arising from the difference of structure cracks caused by stress

2, cracks caused by external load

3, due to the difference in temperature, shrinkage, expansion, uneven settlement and other factors caused by the deformation and stress of crack, the construction of steps can be taken to avoid

The micro cracks (invisible to the naked eye and crack width is less than 0.05 mm ?

The essential elements of below said the waterproof system

Adhesive sealing, waterproof layer and at the grass-roots level, the connection between nodes, waterproof layer tightly bonding, sealing protection maintenance structure. Such as adhesive no pain, did not form a seal, caused by water, broken, missing a piece.

Continuous integrity: waterproof layer to keep continuous, no cracks, closely for long and short lap, lap joint strength and even higher than the material itself.

Environmental corrosion resistance, aging resistance, waterproof system such as water, chemical media, such as ultraviolet ray, make up the structure and design flaws, can long keep waterproof function.

Mechanical damage resistance: resist structure deformation, sedimentation, factors such as cracking at the grass-roots level; Steel or ingredients mechanical shock, and subsequent construction, man-made destruction, etc.

The above elements association,