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No cement shall be applied unless the temperature <br />is at least 40 degrees F and rising. Immedi.atel•y <br />after compacting and finishing the completed base ' <br />shall be covered and protected against rapid dry- <br />ing either by an approved method of earth curing <br />or by a bituminous seal coat. Thickness check <br />determination shall be made as directed by the <br />Engineer. The patching of a soil cement base shall <br />,not be done with concrete. .iui. Le. <br />Mixed in Place Base <br />This base course shall be composed of a compacted <br />mixture of 60% mineral aggregate and 40% marl <br />(excluding plastic material) or shell material <br />together with asphaltic material. The constituents <br />of the mixed in place base shall be combined in <br />such proportions that after complete mixing the <br />resultant mixture shall be homogeneous and all <br />particles coated with bituminous material. The <br />exact quantity of bituminous material shall be <br />determined by the engineer during the operations <br />of applying and mixing and will depend upon the <br />character and grading of the aggregate material. <br />The proportions shall be varied, as directed by <br />the engineer after laboratory tests and field <br />trails are conducted. The quantity of bituminous <br />material shall. be approximately 0.3 to 1.3 gallons <br />per square yard per inch of compacted thickness. <br />Unless otherwise specified and approved, the bitum- <br />inous material shall be cutback asphalt grade RC -1S. <br />Unless otherwise approved a Seaman Mixer or a P & H <br />Pulvi Mixer shall be used to mix the material in <br />place and a roller or other approved types and <br />methods shall be used for compaction. If in place <br />material is to become a portion of the base course <br />the amount to be used must be windrowed and the sub - <br />grade prepared as described in Section C.2. <br />All base course material shall have all roots and <br />foreign matter removed to the satisfaction of the <br />County Administrator. After the placing of the <br />base material, it shall be machined with the grader <br />until a uniformity of line and grade has been ob- <br />tained as determined by the -County Administrator—, <br />No bituminous material shall be applied when the <br />moisture content of the aggregate material is <br />greater than S% by weight, unless -otherwise speci= <br />fied by the Engineer. No application of bituminous <br />material, mixing, spreading or finishing shall be <br />-6- <br />