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40 <br />Y <br />SECTION 02303 <br />LIME ROCK BASE COURSE <br />1. DESCRIPTION <br />1 <br />A. Under this item, the Contractor shall construct a lime rock base course upon <br />the completed stabilized subgrade. <br />The base course shall be construcl.ed in <br />accordance with the lines and grades and typical section as shown on the <br />drawings. <br />2. MATERIALS <br />A. The Contractor may use lime rock for the base course from either the Ocala <br />Formation or the Miami Oolite . Formation at his option, provided it meets <br />the Specifications contained herein and complies with Section 911 "Lime rock <br />Material for Base and Stabilized Base" of the 1986 Edition of Florida D.O.T.'s <br />Standard Specifications for Road and Bridge Construction. Only one of the <br />two grades of lime rock shall be used on the project. <br />n, Tha material ghall-he —scl epi nr krnlran ICK to Qtr h ciya hafnre heing ninf- rton the road, that not less than 97 percent will pass a 3 1/2 inch sieve and it <br />Mh.,ll be ceded ^:f;•. l down to dust. Al! fi^ at^ ^! shall c t ntire!ygr.. .... .....y .. ... s. <br />of dust of fracture. <br />3. PLACEMENT OF MATERIAL <br />A. After the subgrade is completed and approved, the Con tractor shall furnish <br />and spread the lime rock in a uniform distribution. Segregated areas of fine or <br />course rock will not be permitted. Such areas shall be removed and replaced <br />with properly graded rock. <br />i B. After the spreading is completed, the entire surface shall be scarified and <br />shaped so as to produce the required grade and cross section after <br />compaction. <br />4. MOISTURE CONTENT <br />A. When the lime rock does not have the proper moisture content to obtain the <br />required density, wetting or drying wiii be requited. v nun waicr is added, it <br />shall be mixed in uniformly. Wetting or drying operations shall involve manip- <br />ulation of the entire width and depth of the base course before compaction. <br />5. COMPACTION <br />A. The required compaction of the lime rock base course shall be a minimum of <br />98 percent of the maximum dry density. <br />B. No less than 8 10 ton steel drum or pneumatic tired roller shall be used to <br />compact the lime rock base course. Ali depressions shall be filled and the <br />process of rolling and filling shall continue until a thoroughly compacted <br />uniform surface is produced. During final compaction operations, if blading of <br />any area is necessary to obtain the true grade and cross section, the compac- <br />tion operations for such areas shall be completed prior to making the field <br />density compaction test on Ilse finished base. <br />02303-1