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C . The required density and cross section of the subgrade shall be maintained until <br /> the base has been laid . If the final grade becomes rutted or displaced , regardless <br /> 4; <br /> of the reason , re-grade and re-compact it at no additional expense to the OWNER . <br /> All ditches , drains , and swales shall be maintained along the completed subgrade <br /> section after their construction . <br /> D . All drainage culverts , conduits , water and sewer lines , and all other construction to <br /> be placed under the pavement shall be installed before the final shaping and <br /> compaction of the subgrade . <br /> 3 . 2 COMPACTION <br /> A . FLORIDA BEARING VALUE - Unless otherwise specified or shown on the Plans , <br /> the stabilized subgrade shall have a minimum Florida Bearing Value of 50 psi . All <br /> subgrade material shall also meet minimum 40 LBR , compacted to 98 % maximum <br /> density per AAS HTO- 180 . <br /> Be The subgrade shall be shaped to within 1 /4 inch of the cross section grade shown <br /> on the DRAWINGS prior to taking density tests . Work shall not proceed until all <br /> required density tests have passed . <br /> C . All subgrade shall be compacted to minimum 98 percent of the maximum dry <br /> density per AASHTO T- 180 . <br /> D . Compaction shall be accomplished with a self- propelled steel drum or pneumatic <br /> tired roller weighing at least 8 tons . Fill all hollows or depressions forming due to <br /> rolling with appropriate suitable material . Repeat grading and rolling until <br /> depressions no longer develop . <br /> 3 . 2 COMPACTION TESTS <br /> A . Take compaction tests at the locations specified herein or at locations selected by <br /> the ENGINEER or his authorized representative . <br /> Be As a minimum , Florida Bearing Value tests shall be taken at 300 linear foot <br /> intervals . <br /> C . Density tests ( Modified Proctor Test) per AASHTO TA 80 shall be taken at minimum <br /> 300 linear foot intervals . Each subgrade material which is inherently different in <br /> composition from other subgrade material shall require an additional modified <br /> Proctor Test . <br /> + + END OF SECTION + + <br /> 4 <br /> 02510-2 02510 — Stabilized Subgrade <br />