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e <br /> 3 . 02 Record Drawing elevations shall be confirmed to meet design drawing grades prior to placement of <br /> base material . <br /> 3 . 03 The top of the subgrade in both cuts and fills shall be compacted to a minimum of 98 percent of the <br /> maximum dry density to the depth specified on the Plans. The required density shall be maintained <br /> until the surface course has been constructed. The subgrade shall be compacted with an approved <br /> self-propelled steel drum or pneumatic tired roller weighing not less than 8 tons . All hollows and <br /> depressions which develop under rolling shall be filled in with suitable material. The process of <br /> grading and rolling shall be repeated until no depressions develop. After compaction, the top surface <br /> of the fine grade shall be true to line and grade at all locations. If the fine grade becomes rutted or <br /> displaced due to any cause whatsoever, the Contractor shall regrade it and recompact it. Ditches, <br /> drains, and swales shall be maintained along the completed subgrade section after their construction. <br /> 3 . 04 In no case shall the Contractor proceed to construct further courses on the subgrade until the <br /> subgrade has been tested for Florida Bearing Values, compaction, checked for line and grade, and <br /> approval given by the Engineer. <br /> 3 . 05 Material and Compaction Testing <br /> A. Florida Bearing Value tests on the subgrade shall be taken at a minimum of four (4) test <br /> locations per 10,000 sf of area to be paved, where designated by the Engineer. Smaller <br /> projects shall have a minimum of two (2) test locations. <br /> B . The maximum density and optimum moisture shall be determined in accordance with the <br /> Modified Proctor Test procedures of AASHTO T180 (Method D as modified by the <br /> F.D .O .T. ) . The percentage compaction and in place density shall be determined according <br /> to procedures of ASTM D2167 "Test for Density of Soil In Place by the Rubber Balloon <br /> Method" or the nuclear method ASTM D2922. <br /> C. Each material which is inherently different in composition from other subgrade material <br /> and which is used over a widespread area of the project, will necessitate an additional <br /> Modified Proctor Test. <br /> END OF SECTION <br /> e <br /> e <br /> 02714- 2 02714 — Stabilized Subgrade <br />