Waterstop is widely uesed in the building construction. And it is a very important building waterproofing material. It is set in the joints of the concrete to prevent water leak from the concrete joints. Different type of waterstop will be chosen in different kind of concrete joints to make sure the waterstop can give full play to waterproofing performance.
General, if distinguishing from position, there are 4 type of waterstops:
Internal expansion joint waterstop
Internal construction joint waterstop
External expansion joint waterstop
External construction joint waterstop
Internal expansion joint waterstop is suitable for the expansion joint and shear joint where extra large movement is anticipated.
Internal construction joint waterstop is suitable for the place where is subject to high hydraulic pressure, such as reservoirs, dams, tunnels.
External expansion joint waterstop is suitable for the concrete joints which have extra load on the sealing wall and ground slab.
External construction joint waterstop is used in the wall and ground slab to prevent water infiltrating vertically.
And If distinguishing from the shape, waterstop has the following type:
For the expansion joint waterstop
Ribbed Center Bulb
Ribbed center bulb shape PVC waterstop is one of the most frequently-used type of waterstop.
Dumbbell with Center Bulb
Dumbbel with center bulb shape PVC waterstop is suitable for the expansion joint where is subject to longitudinal movement, transverse movement and shear movement.
Internal Moving joint
External Moving joint
For construction joint waterstop
Base seal shape waterstop is used in wall or ground floor slab to prevent water infiltrating in vertical direction.
Flat ribbed shape PVC waterstop is suitable for non-moving joints and provide the best water sealing characteristics.
Dumbbell shape PVC waterstop is used in construction joint which accommodate little or no movement.
External No-moving Joint