Title: Nonmetallic Waterstops
Author(s): George C. Hoff and B. J. Houston
Publication: Journal Proceedings
Appears on pages(s): 7-13
Keywords: canals: concrete construction: concrete durablity;concretes: culverts: joint seaters; latex (plastic); polyvinyl chloride: research: reservoirs; rubber; sealing;
Nonmetallic waterstops having suitable roperties for use in joints in hydraulic structures concrete have been made successfully from natural rubber synthetic rubber, and polyvinyl chloride. To perform satisfactorily, a waterstop must have sufficient strength and extensibility to avoid being ruptured by joint movement, and it must maintain strength and extensibility over the temperature range and in spite of any chemical attack from the environment. It must also have suitable dimensions and configuration and be installed so as to avoid water flow around the embedded ends. Field and laboratory studies have led to the establishment of various minimum proper requirements. Suitable waterstop materials should have a tensile strength of at least 1400 psi (plastic) or 2000 psi (rubber), the ability to elongate 280 percent (plastic) or 360 ercent (rubber), and be able to maintain certain evels of other relevant properties P after various chemical and thermal exposure.