03-12-1984 Council Packet - Laserfiche WebLink

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2800. BITUMINOUS STREET REPAIR General Requirements 2800.0 SPECI_FICA_TION REFERENCE: The Minnesota Department of Transportations, "Standard Specifications for Highway Construction," 1978 Edition and all amend- ments thereto shall apply except as modified or altered in the following General Requirements. 2800.1. DESCRIPTION: This work shall consist of miscellaneous patching and re- pairing of existing bituminous surfaced streets in accordance with the following requirements. 2800.2. MATERIALS: 2800.2.1. Gravel Base: Gravel base shall co:iforr: with Mn/DOT Specification 3138 for Class 6 Aggregate. 2800.2.2. Prime Coat: Bituminous material for prime coat shall meet the quality requirements of Mn/DOT Specification 3151 for MC Asphalt 2800.2.3. Patching Mixture: Bituminous mixture for patching shall meet the require- ments of Mn/DOT "?ecification 2341. 2800.3. CONSTRUCTION REQUIREMENTS: 2800.3.1. Excavation: All existing bituminous material shall be removed from the areas to be patched as designated by the Engineer. The area to be patched shall be shaped to provide a square shoulder perpendic-lar to the direction of traffic. All sides of the excavation shall be nearly vortical. All excavated material shall be disposed of as indicated in the Special Pro- visions. 2800.3.2. Gravel Base: Upon completion of excavation, the subgrade shall be com- pacted in a manner which shall provide densities equal to "Ordinary Compaction" re- quirements as specified under Mn/DOT Specification 2105. Gravel base shall hp installed and covj1Rct,-d to bring the patching area to proper grade and shape. The grovel hasp shall be a minimum of 6" in thickness. 2800.3.3. Bituminous Surface: After completion of the gravel compaction, the Con- tractor shell prime the prepared L, a with MC-70 asphalt applied at a rate of 0.3 gallons per square yard. Bituminous patching mixture meeting t'1e requirements of Mn/DOT. Specifica- tion 2341 shall be placed, spread and compacted in the patch area. The bituminous patch shall be at least 3" in thickness. Compaction shall be done with a self- propelled steel roller of 8 ton weight with 250 pounds per linear inch compression on the rear roller. '"r 2800-1 € 2 / 7 9