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<br />I <br /> <br />I <br /> <br />SECTION 02219 <br /> <br />I <br /> <br />Contractor will not be entitled to additional allowance <br />above the prices bid in the schedule by reason of any work <br />required to achieve the placement moisture content and <br />density specified in this section. <br /> <br />I <br /> <br />B. <br /> <br />Moisture Control. <br /> <br />I <br /> <br />1. The standard optimum moisture content is defined as, <br />"That moisture content which will result in a maximum dry <br />, <br />unit weight of the soil". The maximum dry weight, in <br />pounds per cubic foot is the Proctor maximum dry density. <br /> <br />I <br /> <br />The m6isture content of the earthfill material prior to <br />and during compaction shall be distributed uniformly <br />throughout each layer of the material. The allowable <br />ranges of placement moistu~e content are based on design <br />consideratiDns. The moisture content shall be such that <br />the moisture content of compacted earthfill, as determined <br />by tests performed by the ~ngineer or his Geotechnical <br />agent shall be within +- 21-. <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />3. Moisture shall be added to the material in place in the <br />borrow area by means of sprinkler irrigation of the borrow <br />area. Additional water may be added at the embankment <br />construction site if required. <br /> <br />I <br /> <br />C. Density Control. <br /> <br />I <br /> <br />1. Density control of compacted earthfill shall be such <br />that the density of the compacted material, as determined <br />by tests performed by the Engineer shall be not less than <br />95 percent of maximum dry density in accordance with ASTM <br />D-698. <br /> <br />I <br /> <br />I <br /> <br />2. The Engineer will inform the contractor when the dry <br />density fails to meet the limits specified above, and <br />the Contractor shall immediately make adjustments in <br />procedures as necessary to maintain the dry density within <br />the specified limits. <br /> <br />I <br /> <br />D. Compaction Equipment. Tamping rollers shall be used for <br />compacting the earthfill. The rollers shall meet the <br />following requirements: <br /> <br />I <br /> <br />I <br /> <br />1. Roller Drums: Tamping rollers shall consist of two or <br />more roller drums mounted side by side in a suitable <br />frame. Each drum of a roller shall have an outside <br />diameter of not less than 5 feet, and shall be not less <br />than 5 feet nor more than 6 feet in length. The space <br />between two adjacent drums, when on a level surface, shall <br />be not less than 12 inches nor more than 15 inches. Each <br />drum shall be free to pivot about an axis parallel to the <br />direction of travel. Each drum ballasted with fluid shall <br />be equipped with at least one safety head. The safety <br />head shall be equal to union type safety heads as <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />38 <br />