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IJ as specified herein. ' Section 160 -4- MATERIALS — Add the following: Except that the limerock used for stabilization shall have a minimum of at least fifty percent (50 %) carbonates of calcium and magnesium. Section 160- 7.2.1.2 Under tolerances in Bearing Value Requirements- , Delete this sub - article and substitute the following: There shall be no under tolerance in the C.B.R. permitted. Section 160 -10 BASIS OF PAYMENT: Delete this article and substitute the following: Payment for stabilizing sub -grade shall be included under Contract Unit Price Bid Limerock Material. 25. Limerock Base Construction (Section 200) 1 25.01 General The work specified under this Section shall consist of the construction of a base course composed of Limerock. It shall be constructed on a sub -grade prepared in accordance with Section 120 -9.4 of the FLORIDA DEPARTMENT OF TRANSPORTATION'S STANDARD SPECIFICATIONS FOR ROAD AND BRIDGE CONSTRUCTION. That portion of the street bed immediately below the proposed base course, in both cuts and fills, shall be scarified, graded, shaped and compacted to conform to the lines, grades and cross section shown in the Plans or as directed by the Engineer. 25.02 Sub -grade Within the entire limits of the proposed sub - grade, the minimum density acceptable at any location shall be ninety -five 95 percent, of maximum density, as determined by AASHTO T -180. tPrior to placing the base, the sub -grade will be inspected by the Engineer to ascertain whether or not the Work satisfies the requirements as to specified density, lines, grades and cross section. Where trenches for widening strips are not of sufficient width to permit the use of standard compaction equipment, any compaction effort required shall be accomplished by, trench rollers, or other type compaction equipment approved by the Engineer. It shall be the Contractor's responsibility to maintain the required density until the base is placed on the sub grade. 25.03 Limerock Base ' The base shall have an overall compacted thickness as specified and noted in the Plans. When the specified compacted thickness of the base is greater than eight inches, it shall be constructed in two (2) equal lifts. Each lift shall be graded and compacted to a density of not less than the above 1 mentioned percentages of maximum density as determined by AASHTO T -180. The minimum Special Provisions 09/24 Page 8 of 16