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additional to bear the weight of the construction equipment without disturbing the <br /> subgrade . <br /> 3 . 2 FINISHING <br /> 1 A . For double-coarse bases , blade the first course if necessary to secure a uniform <br /> surface and compact to the density specified herein immediately prior to spreading <br /> the second course . No other finishing of this course is required . <br /> Be After all spreading is completed , scarify the entire surface and shape it to produce <br /> the exact grade and cross section after compaction . For double-course bases , <br /> scarifying shall slightly penetrate the surface of the first course . <br /> C . If at anytime , the subgrade material becomes mixed with the base course material , <br /> Iexcavate and remove the mixture , reshape and compact the subgrade , and replace <br /> the materials removed with clean base material , shaped and compacted as <br /> specified herein . <br /> 3 . 3 MOISTURE CONTENT <br /> A. If the limerock does not have the proper moisture content to obtain the specified <br /> density, wet or dry it as required . When water is added , mix it uniformly with the <br /> 1 limerock . If wetting or drying is required , these operations shall involve the <br /> manipulation of the entire width and depth of the base course before compaction . <br /> 3 . 4 COMPACTION <br /> A . All limerock base shall be compacted to a minimum of 98 percent of the maximum <br /> density as determined by AASHTO T- 180 . <br /> Be Compaction shall be accomplished with a self-propelled steel drum or pneumatic <br /> tired roller weighing at least 8 tons . All areas which are low and do not conform to <br /> the design template after rolling shall be scarified , filled with well -graded limerock <br /> and the grading and rolling continued until the base conforms to the design grade <br /> and section . <br /> C . During final compaction operations , if blading of any area is necessary to obtain the <br /> true grade and cross section , complete the compacting operations for such area <br /> prior to making the density tests on the finished bases . <br /> 1 D . If cracks or checks appear in the base , remove them by rescarifying , reshaping , <br /> refilling with limerock where needed , and recompacting , at no cost to the OWNER . <br /> I <br /> Last revised 7/25/02 02514-2 EAST GIFFORD <br /> RIPublic worksweithM\stormeter Projects\Gifford East\construction contract\Technical Specifications\Final Specifications\Division <br /> 2\02514 - Limerock Base.doc <br /> 1 <br />