SECTION 812 — WATER STOPS — WATER STOPS
812.01 Description.
This work includes furnishing and installing water stops in various types of concrete joints at the required locations.
812.02 Materials.
Provide polyvinyl chloride (PVC) water stops that are manufactured by the extrusion process from an elastomeric plastic compound, the basic resin of which is PVC. Ensure that the compound contains any additional resins, plasticizers, stabilizers, or other materials needed to ensure that, when the material is compounded, it will meet the performance requirements in the Table below when tested under the indicated ASTM test method. Do not use any reclaimed PVC or other material. Specifications for PVC Compound Specific Gravity ASTM D792 Max 1.35 Durometer Hardness ASTM D2240 75 ± 5 Tensile Strength ASTM D412 Min 1.8 ksi Elongation ASTM D412 Min 350% Cold Brittleness ASTM D746 -35°F Stiffness in Flexure ASTM D747 Min 0.350 ksi
812.03 Construction Methods.
Where movement at the joint is provided for, ensure that the water stop can accommodate the movement without damage. Splice water stops, welded or soldered, to form durable continuous watertight joints. Ensure that the water stops are neither displaced nor damaged by construction operations or other means. Repair damaged components. Ensure that all surfaces of the water remain free from oil, grease, dried mortar, or any other foreign matter while the water stop is being embedded in concrete. Ensure that all portions of the water stop designed for embedment are tightly enclosed by dense concrete per the manufacturer’s recommendations. Provide a Certificate of Analysis from an approved independent testing laboratory to the Engineer. Ensure that the certificate states that the material furnished conforms to all requirements specified herein and includes all qualitative and quantitative test results. For the installation of water stops, demonstrate proven ability and competence in the installation of these products, in conformance with the manufacturer’s instructions: • Preparatory Work. Protect a ll water stops from oil, dirt, concrete spatter, and damage, and clean the water stops to receive concrete forms. During the installation of water stops,
Part 800 — Bridge Structures August 2025
SECTION 812 — WATER STOPS 800-85 eliminate all deficiencies that may cause leakage. Position w ater stops to not create interference with reinforcing bars and slip during installation. • Methods. Different methods may be used to fasten the water stop in position. Hold a ll water stops rigidly in place by extending through slots in keyways; held by split bulkheads; tied to reinforcing bars; or other adequate methods as necessary to ensure proper support and embedment during the concreting process. Ensure that the method used does not cause damage to the water stops nor compromises the integrity of the watertight seal. • S plicing . PVC water stops may be butt-spliced on the job according to the manufacturer’s recommendations. Demonstrate to the Engineer that all individuals who are responsible for performing splices can create the proper joint. Upon request , the manufacturer shall demonstrate the splicing method for producing a strong, water-tight butt weld.
812.04 Method of Measurement.
Water stops will not be measured separately for payment.
812.05 Basis of Payment.
Water stops will not be paid for separately and are incidental to the pay item for the concrete listed in the Proposal.
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