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4W 0 M SE CTION 02303 LL'4]E ROCK BASE COURSE 1. DESCRIPTION A. Under this item, tate Contractor shall construct a lime ruck base course upon the completed stabilized subgrade. The base course shall be constructed in accordance with the lines and grades and typical section as shown on the drawings. 2. MATERIALS A. Tile Contractor may use lime rock for (lie base course from either the Ocala Formation 4L (lie Miami Oollte .;Formation at his option, provided it meets the Specifications contained herein and complies with Section 911 "Little rock Material for Base and Stabilized Base" of tite 1996 Clition of Florida D.O.T.'s Standard Specifications for Road and Bridge Construction. Only P—of the two grades of lime rock shall be used on the project. The material shall be crushed or broken up to such size, before being ,placed on (lie road, that not less than 97 percent will pass a 3 112 inch sieve and it shall be graded uniformly down to dust. All fine material shall consist entirely of dust of fracture. 3. PLACE MENTOF MATERIAL A. After the subgrade is completed and approved, the Con tractor shall furidsh and spread the lime rock in a uniform distribution. Segregated areas of fine or course rock will not be permitted, Such areas shall be removed and replaced will) properly graded rock. B. After the spreading is completed, the entire surface shall be scarified and shaped so as to produce the required grade and crass section after compaction. 4. MOISTURE CONTENT A. Waren (lie lime rock does not have the proper moisture content to obtain the required density, wetting or drying will be required. W lieu water is added, it sliall be mixed in uniformly. Wetting or drying operations shall involve manip- ulation of (lie entire width and depth of the base course be fore compaction. 5. COMPACTION A. The required compaction of the little rock lyase course shall be .1 tmilhirnulti of 98 percent of [lie maximum dry density. B. No less than 8 fU ton steel drum or pnetniiatic tired rollel. shall be used to conhpac( the little rock base course. All depressions slhall be filled and the process of rolling and filling shall continue ult(il a thoroughly compacted uniform surface is produced. During final compaction operations, if blading of any area is necessary to obtain lite nue grade and cross section, (lie compac- lion operations for such areas shall be comple(ed prior to making [Ile field density compaction test oil the finished base. 02303-1