2008-213 (5) - Laserfiche WebLink

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PART 3 - EXECUTION OF WORK 3 . 01 PLACEMENT OF MATERIAL The base course shall be constructed in accordance with the lines, grades, and typical section as shown on the Drawings . Unless otherwise noted construction shall conform to the provisions of Florida D. O.T. Standard Specifications for Road and Bridge Construction, Section 250, 2002 Edition. After the subgrade is completed and approved, the Contractor shall furnish and spread the coquina shell in a uniform distribution. Spread thickness shall be a minimum of 9 inches. Segregated areas of fine or course rock will not be permitted. Such areas shall be removed and replaced with properly graded rock. After the spreading is completed, the entire surface shall be compacted, scarified and shaped so as to produce the required grade and cross section after compaction. 3 . 02 COMPACTION The required compaction of the coquina shell base course shall be a minimum of 98 percent of the maximum dry density. No less than 8- 10 ton steel drum or pneumatic tired roller shall be used to compact the base course . All depressions shall be filled and the process of rolling and filling shall continue until a thoroughly compacted uniform surface is produced. During final compaction operations, if blading of any area is necessary to obtain the true grade and cross section, the compaction operations for such areas shall be completed prior to making the field density-compaction test on the finished base. Should the subgrade material become mixed with the base course material at any time, the Contractor shall remove the mixture, reshape and recompact the subgrade, replace the materials removed with additional coquina shell and reshape and recompact the coquina shell base at no cost to the Owner. If cracks or checks appear in the base which would impair the structural integrity of the base in the opinion of the Engineer, the Contractor shall remove the cracks or checks by rescarifying, reshaping, refilling with coquina shell where necessary, and recompacting at no cost to the Owner. The finished coquina shell base shall be checked for thickness at intervals of not more than 300 feet on center. Finished thickness shall be as shown on the Drawings . Any areas which are less than 1 /2 inch of the specified thickness shall be corrected by scarifying and adding rock. The scarifying shall extend for 50 feet either side of the deficient area. Areas which are less than 1 /2 inch deficient in thickness shall be corrected if the Engineer determines that the area is extensive or may adversely affect the quality of the finished work. 3 . 03 PRIME COAT The prime coat shall be a rapid curing liquid cut back asphalt equal or equivalent to RC-70 or RC- 250 at the Contractor's option, and conforming to Sections 300 and 916-2 of the 2002 Edition of the Florida D.O .T. Standard Specifications for Road and Bridge Construction. 02722 — Cemented Coquina Shell Base 02722 - 2