Laserfiche WebLink
BITUMINOUS CRACK SEALING TECHNICAL SPECIFICATIONS <br />1. General <br />This project shall consist of sealing working cracks on the streets identified on the attached <br />project location map. The Contractor shall conduct his work in conformance with the <br />specifications set forth herein and in accordance with the Minnesota Department of <br />Transportation Standard Specification for Construction, 2016 Edition, which is incorporated <br />by reference to these specifications. In addition, the Contractor shall conduct the crack <br />sealing operation in strict conformance with the material manufacturer's written instructions. <br />Crack seal material shall be applied to cracks in the asphalt surface and along the <br />longitudinal joint adjacent to concrete curb and gutter. The material shall not be spread on the <br />concrete curb. <br />2. Materials <br />The material used for crack sealing shall meet MnDOT Specification 3723. <br />3. Equipment <br />Crack sealing material shall be maintained within the specified temperature range in a double <br />jacketed, mechanically agitated melting kettle complete with internal temperature measuring <br />devices and a pressure distribution system shall be capable of applying crack sealers through <br />a hand operated wand. Pour pots or similar devices shall not be used to apply the sealer. <br />4. Cleaning <br />Immediately prior to sealing, the cracks and surface area six inches on both sides of the crack <br />shall be cleaned of foreign matter, loosened particles and vegetation with a heat lance. The <br />heat lance shall deliver air heated to a minimum of 1800°F at an orifice exit velocity of 2800 <br />f.p.s. <br />5. Sealing <br />The sealant shall be placed evenly and slightly recessed at the pavement surface. After the <br />sealant has been placed, the excess shall be squeegeed with a "V" shaped rubber squeegee <br />which will force the excess material into the crack and wipe it from the pavement surface, <br />creating an overband alongside the crack. Generally, cracks between 1/4 inch and one inch <br />shall be sealed in this manner. Following sealing, cover material shall be placed on top of <br />the sealant while still hot. Traffic shall not be allowed on the material until it has been cured <br />or blotted. Sealant pulled out by traffic shall be reapplied by the Contractor at no cost to the <br />City. <br />6. Method of Payment <br />All asphalt sealant material, labor and equipment necessary to complete the work shall be <br />paid for at the unit price per pound. <br />BCTS 1 <br />