How does a waterstop work?
Hydrophilic waterstops are adhered directly to the surface of the first concrete pour in preparation for the second concrete pour to form the joint area. The material in the strip reacts with water and swells to form a positive watertight seal in the concrete joint.
What is the purpose of waterstop?
Waterstop is a material that is embedded in the concrete, across the concrete joint, to obstruct the passage of water through the joint. A waterstop installed in concrete joints is an important component of the overall waterproofing design.
How do you place a waterstop?
Installation: Place waterstops at appropriate position. Make sure that about a half width of it is embedded in the concrete. Contain about 1.5 times of clear coverage between the waterstop and surround reinforcing steel without any rock pockets and air voids.
Why are PVC waterstops used for expansion joints?
PVC waterstop is used for the movement joints and expansion joints due to its ability to bear the movement of the structures. Due to the following advantages, PVC waterstops are more popular. High flexibility. High elasticity and tensile strength. Low water absorption. Resistant to corrosion.
What kind of waterstop is best for non moving joints?
Flat waterstop profiles without a centerbulb or tear web are suitable for non-moving joints. Other waterstop materials may be considered for non-moving joints as well, such as strip-applied or injectable hose waterstops.
What is the purpose of A waterstop in concrete?
A waterstop is an element of a concrete structure, intended to prevent the passages of fluids (such as water) when embedded in and running continuously through concrete joints. There are two distinct categories for waterstops: Waterstops for Movement Joints and Waterstops for Non-Moving Joints.
What kind of water stops are used in hydraulic joints?
PVC waterstops and Copper waterstops can be seen widely in the hydraulic structures. Bentonite waterstops are bentonite-based hydrophilic type water stops. These water bars are placed as strips at the construction joints. These water bars cannot be placed in all types of joints. Especially, they cannot be used in expansion and movement joints.