Ord 1975-004 - Laserfiche WebLink

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150-e d). When the "ordinary compaction" methodris specified, the following pro- visions shall govern: Each layer shall not exceed eight (8) inches of loose depth, and shall be compacted until there is no evidence of further compaction, in accordance with provisions governing "Rolling". Prior to and in conjunction with the rolling operation, each layer shall be brought to the moisture content ordered by the Engineer, and shall be kept leveled with suitable equipment to insure uniform compaction over the entire layer. 2. Flexible Base. a). Flexible base shall consist of a foundation course of sic (6) inches I for surface course or other base courses; shall be composed of crushed stone or other stone materials; and shall be constructed as herein specified in one or more courses in conformity with the typical sections shown on plans and/or grades established by the Engineer. b) . Material. Tbe material shall consist of argillaceous limestone, calcareous or calcareous clay particles, with or without stone, conglomerate, gravel, sand or other granular materials. The material shall be a graded material such that it has sufficient fine ma~erial to bind the base. The material source shall be approved by the Engineer. c). Construction Methods. Immediately before placing the base material, the sub-grade shall be checked as to conformity with grade and section. Material deposited upon the sub-grade shall be spread and shaped the same day unless otherwise directed by the Engineer in writing. In the event inclement weather or other unforeseen circumstances render impractical the spreading of the material during the first 24-hour period, the material shall be scarified and spread as directed by the Engineer. The material shall be sprinkled, if directed, and shall then be bladed, dragged and shaped to conform to typical sections as shown on the plans. All areas and "nests" of segregated course or fine material shall be corrected I or removed and replaced with well graded material, as directed by the Engineer. If additional binder is considered desirable or necessary after the material is spread and shaped, it shall be furnished and applied in the amount directed by the Engineer. Such binder material shall be c~refully and evenly incorporated with the material in place by 'scarifying, harrowing, brooming or by other approved methods. When the plans indicate that the "ordinary compaction" method is to be used, the following provision shall apply: The course shall be sprinkled as required and rolled as directed until a uniform compaction is secured. Throughout this entire operation, the shape of the course shall be maintained by blading, and the surface upon completion shall be smooth and in conformity with the typical sections shown on plans and to the established lines and grades. In that area on which pavement is to be placed, any deviation in excess of one-fourth (1/4) inch in cross section and in a length of sixteen (16) feet measured longitudinally shall be corrected by loosening, adding or removing material, reshaping and recompacting by sprinkling and rolling to avoid ponding of water. All irregularities, depressions or weak spots which develop shall be corrected immediately by scarifying the areas affected, adding suitable material as required, reshaping and recompacting by sprinkling and rolling. 3. All-weather Surface. a). Portland Cement Concrete. I This item shall consist of a pavement and/or base of portland cement concrete, with reinforcement as shown on plans, with or without monolithic curbs, constructed as herein specified on the prepared subgrade or other base course in conformity with the thickness and typical cross sections shown on paIns and to the lines and grades established by the Engineer. Concrete shall be considered of satisfactory quality provided it is made (1) of materials accepted for the job, (2) in proportions estab- lished by the Engineer, and (3) mixed, placed, finished and cured in accordance with standard requirements utilized in proper concrete construction.