Tuesday, December 09, 2008
New Retrofit Waterstop Profile Accommodates Very Large Joint Movements
JP Specialties, Inc. has developed a new Earth Shield® waterstop product specifically designed to accommodate large shear movements, such as tank ring foundations subjected to settlement. The JP621L Retrofit Waterstop System is chemically and mechanically adhered to the existing concrete using one of our chemical resistant, novolac epoxies (VEN500 or VEN1000), stainless steel batten bar, and stainless steel anchor bolts. The waterstop profile is combed along the fastening leg, which facilitates the epoxy bonding to the profile. The embedded waterstop leg has two large polymer dams which are designed to create a torturous fluid path and simultaneously perform as anchor points for the new concrete to bond to. The JP621L profile has a large, tear-web centerbulb that can move greater than five inches without deformation of the waterstops main body. (The thin diaphragm, or "tear-web", ruptures under shear stress, allowing the "U-bulb" to move freely for its entire length when installed in an open joint.) JP621L Retrofit Waterstop can be heat welded to a continuous, fluid-tight barrier, like all our Earth Shield® waterstop profiles, and can be joined to our baseseal (or rearguard) profiles for intersecting joints.