1999-177B - Laserfiche WebLink

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O 11 " C. Should the subgrade material become mixed with the base course materiah at any (ince, tite Contractor shall remove lite mixture, reshape and recontpact the subgrade, replace the materials removed with additional little rock, and reshape and recompact the little ruck base at no cost to the Owner. D. if cracks or checks appear in the base which would impair the structural integrity of the base in the opinion of t[te Engineer, lite Contractor shall remove the cracks or checks by rescarifying, reshaping, refilling with lime rock where necessary, and recontpacting at no cost to the Owner. E. The finished lithe rock base shall be checked far thickness at intervals of not more than 340 feet. Areas which are less than 112 inch deficient in thickness shall be corrected by scarifying and adding rock if lite Engineer determines that the area is extensive or may adversely affect tite duality of the finished work. The scarifying shall extend for 50 feet either side of (lie deficient area. 6. PIUME COAT A. Tice 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 lite 1986 Edition of the Florida D.O.T. Standard Specifications for Road and Bridge Construction. B. The surface of the base material shall be cleaned after final compaction and tite ntoisture content of [lie base shall not exceed 90 percent of lite optimum moisture before the prime coat is applied. The prime coat shall be applied uniformly with a pressure distributor. The entire length of the spray bar shall be set at the height above the surface recommended by Elle Manufacturer for even distribution. The prune coat shall be applied to the finished base course at the rale of 0.15 galions per square yard at a temperature between 1001 E. to 150o F. 'F'lte prince coat shall be applied such that a period of no longer than two (2) hours lapse prior to application of the asphaltic concrete wearing course, unless the prime coat is covered with sand or screenings as outlined in Section 300-6.5 of the 1986 Edition of the Florida D.O.T. Specifications. 7. TESTING A. The maximuni density and optiniuni moisture shall be deiennined in accordance with cite Modified Proctor Test procedures of ASTM ❑1557 or AAS.1-1TO T1810 (i:iithod. D), The pc;ccataagc compaction and In Blase density sliall be determined according to procedures of ASTM D2167 "`fest for Density of Soil In Place by the Rubber Balloon Method" or the nuclear method ASTM D2922. lit general, one Modified Proctor '[`est per 300 lineal feet of roadwork shall be performed on a representative sample of base material from location(s) designtiled- by the Enghicer. In place density testing shall be performed at the rate of one test per 300 lineal feel of roadwork or 5000 sq. ft. of parking area at comparable locations unless otherwise specified by Lite En Its?_ Leer. 02103-2