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Contractor's extraction gradation analyses, the Engineer will determine the suitability of the materials. 3. The Engineer may require crushing of stockpiled material to meet the gradation criterion. Perform all crushing before the material is placed. C. Spreading RAP Material. 1. Method of Spreading: Spread the RAP with a blade or device which strikes off the material uniformly to laying thickness and produces an even distribution of the RAP. The Contractor may also place the RAP material directly from the milling machine into the trench by a conveyor. When placing the RAP material by conveyor directly from the milling machine, obtain the Engineer's approval of the milling process. 2. Number of Courses: When the specified compacted thickness of the base is greater than 6 inches, construct the base in two courses. Place the first course to a thickness of approximately one half the total thickness of the finished base, or sufficient additional thickness to bear the weight of construction equipment without disturbing the subgrade. Except as might be permitted by the Engineer for special cases, conduct all RAP base construction operations for shoulders before placing the final pavement on the adjacent traveled roadway. D. Compacting and Finishing Base. 1. General: Construct mainline pavement lanes, turn lanes, ramps, parking lots, concrete box culverts and retaining wall systems meeting the requirements of 120- 8.1, except replace "embankment" with "pavement". Construct shoulder -only areas, bike/shared use paths, and sidewalks. Meet the requirements of 120-8.1 except replace "embankment" with "pavement" meeting the acceptance criteria of 200-7.2. Shoulders compacted separately shall be considered separate LOTs a) Single -Course Base: After spreading, scarify the entire surface, then shape the asphalt to produce the required grade and cross-section, free of scabs and laminations, after compaction. b) Multiple -Course Base: Clean the first course of foreign material, then blade and bring it to a surface cross-section approximately parallel to the finished base. Before spreading any material for the upper courses, allow the Engineer to make density tests for the lower courses to determine that the required compaction has been obtained. After spreading the material for the top course, scarify finish and shape its surface to produce the required grade and cross-section, free of scabs and laminations, after compaction. 2. Moisture Content: When the material does not have the proper moisture content to ensure the required density, wet or dry it as required. When adding water, uniformly mix it in to the full depth of the course that is being compacted. During wetting or drying operations, manipulate, as a unit, the entire width and depth of the course that is being compacted. 3. Density Requirements: Compact the material to a density of not less than 98% of maximum density as determined by FM 1-T 180. Where the width of the base construction is not sufficient to permit use of standard base compaction equipment, perform compaction using vibratory compactors, trench rollers, or other special equipment which will provide the density requirements specified herein. Water may be added to the asphalt material as needed to obtain the proper compaction. 01025-26 Technical Specifications F:\Public Works\ENGINEERING DIVISION PROJECTS\1413-Martin Luther King Walking Trail\Admin\bid documents\Master Contract Documents\Technical Specifications.doc