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<br /> <br />THE CITY OF SUNNY ISLES BEACH <br />PROJECT NO. 21-1011 <br />BUILDING DEPARTMENT RELOCATION TO ANNEX <br /> <br />Project No. 21-1011 November 2024 031000 -9 <br />C. Polyurethane sealants for Waterstop joints in concrete shall conform to the following <br />requirements: <br />1. Sealant shall be 2-part polyurethane with the physical properties of the cured <br />sealant conforming to or exceeding the requirements of ASTM C 920, or TT-S-0227 <br />E (3) for 2-part material, as applicable. <br />2. For vertical joints and overhead horizontal joints, only "non-sag" compounds shall <br />be used; all such compounds shall conform to the requirements of ASTM C 920 <br />Class 25, Grade NS, or TT-S-0227 E (3), Type II, Class A. <br />3. For plane horizontal joints, the self-leveling compounds which meet the <br />requirements of ASTM C 920 Class 25, Grade P, or TT-S-0227 E (3), Type I shall be <br />used. For joints subject to either pedestrian or vehicular traffic, a compound <br />providing non-tracking characteristics, and having a Shore "A" hardness range of <br />35 to 45, shall be used. <br />4. Primer materials, if recommended by the sealant manufacturer, shall conform to <br />the printed recommendations of the manufacturer. <br />2.6 JOINT MATERIALS: <br />A. Bearing Pad: Bearing pad shall be neoprene conforming to ASTM D 2000, BC 420, 40 <br />durometer hardness unless otherwise indicated. <br />B. Neoprene Sponge: Sponge shall be neoprene, closed-cell, expanded, conforming to ASTM <br />D 1056, Type 2C5-E1. <br />C. Joint Filler <br />1. Joint filler for expansion joints in water holding structures shall be neoprene <br />conforming to ASTM D1056, Type 2C5-E1. <br />2. Joint filler material in other locations shall be of the preformed non-extruding type <br />joint filler constructed of cellular neoprene sponge rubber or polyurethane of firm <br />texture. Bituminous fiber type will not be permitted. All non-extruding and <br />resilient-type preformed expansion joint fillers shall conform to the requirements <br />and tests set forth in ASTM D 1752, for Type I, except as otherwise indicated. <br />2.7 BACKING ROD: <br />A. Backing rod shall be an extruded closed-cell, polyethylene foam rod. The material shall be <br />compatible with the joint sealant material and shall have a tensile strength of not less than <br />40 psi and a compression deflection of approximately 25 percent at eight (8) psi. The rod <br />shall be 1/8-inch larger in diameter than the joint width except that a one-inch diameter <br />rod shall be used for a 3/4-inch wide joint. <br />2.8 BOND BREAKER: <br />A. Bond breaker shall contain a fugitive dye so that areas of application will be readily <br />distinguishable. <br />B. Bonding agent for hydrophilic Waterstop shall be the manufacturer's recommended <br />adhesive for wet, rough concrete. <br />2.9 SLIP DOWELS: