Laserfiche WebLink
<br /> <br />CITY OF LAKE ELMO, MN | PROJECT NO. 2020.121 STREET GRADING, SELECT GRANULAR AND GRAVEL BASE, <br />AND BITUMINOUS SURFACE CONSTRUCTION 3210-1 <br />SECTION 3210 – STREET GRADING, SELECT GRANULAR AND <br />GRAVEL BASE, AND BITUMINOUS SURFACE CONSTRUCTION <br /> <br /> <br />SCOPE <br /> <br />Under this Section of the Specifications shall be included the furnishing of all material, equipment, labor, and skill <br />necessary to construct a pavement course of hot plant-mixed bituminous aggregate mixture on an aggregate base. <br /> <br />PRODUCTS <br /> <br />1. SELECT GRANULAR BORROW: The material shall be a sand subbase suitable as a subsurface drainage layer and <br />shall be “Select Granular Borrow” per MnDOT Specification 3149.2B, except that no recycled materials shall be <br />allowed. <br /> <br />2. AGGREGATE BASE CLASS 6. The material shall be in accordance with MnDOT Specification 3138 Class 6 <br />Aggregate, except as modified below: <br /> <br />A. The Contractor shall submit the composition breakdown of the proposed recycled material by percent. <br />B. The maximum percentage of recycled concrete shall be 30%. <br />C. Contractor shall submit gradation and bituminous extraction reports per Section 1330 and receive <br />approval from the Engineer prior to placement of any material. The gradations shall be in conformance <br />with MnDOT Spec 1503. <br /> <br />EXECUTION <br /> <br />1. TESTING: Aggregate gradation testing shall be as specified in MnDOT 2211 and MnDOT 3138. One test for <br />gradation for each 500 tons, or fraction thereof, of material delivered. <br /> <br />Select granular gradation testing shall be as specified in MnDOT 3149.2. One test for gradation for each 500 <br />tons, or fraction thereof, of material delivered. <br /> <br />A. Compaction – Aggregate Base: Quality Compaction Method is specified. Testing shall be performed by <br />driving a fully-loaded aggregate truck over the street and areas which deflect shall be reworked. <br /> <br />Water shall be applied at such times and in such amounts as necessary for proper aggregate compaction. <br />The amount of water used shall be incidental to the Work, and no additional payment will be made for this <br />item. <br /> <br />2. GRANULAR DRAINAGE: The Contractor shall take all precautions to assure the prepared subgrade is not rutted <br />or otherwise disturbed during placement of granular drainage material. In the event subgrade is disturbed, the <br />Contractor will stop placement of granular material and restore subgrade to required density and cross-section <br />prior to resuming placement of granular material. <br /> <br />Granular material shall be placed on prepared and approved subgrade with track equipment. Wheeled <br />equipment shall not be driven on prepared subgrade. <br /> <br />3. AGGREGATE BASE: The Contractor shall take all precautions to assure that the granular drainage section is not <br />rutted or otherwise disturbed while aggregate base is being placed. In the event that the granular drainage <br />section is disturbed, the Contractor shall restore it to the required density and cross-section prior to placing <br />additional aggregate base thereon. <br />