2008-213 (5) - Laserfiche WebLink

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C. The required density and cross section of the subgrade shall be maintained until the base has been laid. If the final grade becomes rutted or displaced, regardless of the reason, re -grade and re -compact it at no additional expense to the OWNER. All ditches, drains, and swales shall be maintained along the completed subgrade section after their construction. D. All drainage culverts, conduits, water and sewer lines, and all other construction to be placed under the pavement shall be installed before the final shaping and compaction of the subgrade. 3.2 COMPACTION A. FLORIDA BEARING VALUE - Unless otherwise specified or shown on the Plans, the stabilized subgrade shall have a minimum Florida Bearing Value of 50 psi. All subgrade material shall also meet minimum 40 LBR, compacted to 98% maximum density per AAS HTO -180. Be The subgrade shall be shaped to within 1/4 inch of the cross section grade shown on the DRAWINGS prior to taking density tests. Work shall not proceed until all required density tests have passed. C. All subgrade shall be compacted to minimum 98 percent of the maximum dry density per AASHTO T-180. D. Compaction shall be accomplished with a self-propelled steel drum or pneumatic tired roller weighing at least 8 tons. Fill all hollows or depressions forming due to rolling with appropriate suitable material. Repeat grading and rolling until depressions no longer develop. 3.2 COMPACTION TESTS A. Take compaction tests at the locations specified herein or at locations selected by the ENGINEER or his authorized representative. Be As a minimum, Florida Bearing Value tests shall be taken at 300 linear foot intervals. C. Density tests (Modified Proctor Test) per AASHTO TA 80 shall be taken at minimum 300 linear foot intervals. Each subgrade material which is inherently different in composition from other subgrade material shall require an additional modified Proctor Test. + + END OF SECTION + + 02510-2 02510 — Stabilized Subgrade