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.ne geotechnical engineer. Oytimum moisture content is aet,r,~d as the <br />moisture content corresponding to the mar.imum density of a l~~t•ortory <br />compaction test 1~erformed according to A57'D1 D1557-70. <br />COMPACTED DENSIT'i <br />After each layer has been placed, mixed and spread evenly at the <br />specified moisture content, it shall be thoroughly compactccl to a <br />minimum percent of maximum density as determined by the yeot,.chnical <br />engineer. ttaximum density is defined as the highest density attainec <br />from the laboratory compaction test pertormed according to ASTA1 D1557~-70. <br />COMPACTION I•]ETHOD <br />Compaction shall. be by suitable compaction equipment. we :; u~l9 t~st a <br />smooth drum, vibratory or pneumatic tiro roller for granular soils and <br />a sheepsfoot or segmented roller for cohesive soils. Compaction ~ho1J <br />be performed while the material is at the spectfied more u~ro Conti nt. <br />Compaction of each layer shall be continuous over its entire atea and <br />the compaction equipment shall make sufficient passes to pti~vidc• that <br />the required density has been obtained. <br />FIELD TESTING OF DENSITY AND MOISTURE CONTENT <br />Field density and moisture content tests shall be made by the ~:utls <br />engineer duriny construction of each layer of fill. 7'he ircyucncy of <br />testing will be determined by the sous enyincer in tl~e 1 i~ ],,, deer nrJing <br />on the conditions encountered. Density and moisture coil tens. tr st:. <br />~iall be performed in accordance with ASTM D1556 using a fear or si}: <br />nch sand cone, or ASTM D2922 and 03017 with nuclear density devices <br />and methods. <br />OBSE R'JATION AND TESTING <br />Observation and testing by the soils engineer shall be cont:uui~us duriny <br />the fill and comoactiny operations so that the ~.nt,•nt of the rJ•orcchnir.nl <br />recommendations can be properly interpreted and the result;. .~f the <br />obser•/ations and tests can be reported upon the completion of Le project. <br />SEAS OIJAL L1?1ITATIONS <br />No fill material shall be placed upon frozen subgrade, nor ,,i,,ced, sprE:ad <br />or rolled while it is frozen or thawing, or during unfavor at, l ~: wc~thui <br />conditions. When the work is interrupted by heavy rain, spina or frost. <br />penetration, fill operations shall not be resumed unt.l tl:^ ;ail;: <br />engineer indicates that the moisture con Cent and density oY the previously <br />placed fill are as specified. <br />AB-2 <br />M85021GE <br />• <br />~am6ert ~iia ~,s,soriare~s <br />GOnSUEn NG GEOIECN H~CAE En G~NEEHS AND <br />M ATE PIAE iEStING <br />