CUT, RE SECTION VI. (Sub-section 290) Cut, Removal, and Replacement of Paved Surfaces. 1. Description Bituminous Pavements thru 290-2

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1 CUT, RE SECTION VI (Sub-section 290) Cut, Removal, and Replacement of Paved Surfaces Article Page 1. Description Bituminous Pavements thru Concrete Pavements thru Measurement and Payment 290-4

2 REMOVAL, AND REPLACEMENT OF SUB-SECTION DESCRIPTION This Section specifies the general construction requirements for replacing all pavement surfaces, which are necessary to be cut to accommodate the installation of underground pipelines. In general, such paved surfaces include both plant-mixed hot bituminous pavements and bases, and concrete, and will also include replacement of compacted base materials equal to existing materials. If no base materials exist, a minimum of 8 compacted thickness will be required consisting of crushed limerock unless the Engineer directs otherwise. Ditch excavations and pavement replacement shall conform to the standard details as provided under Section III of these specifications. Restoration materials shall match the existing as nearly as possible and existing base material from the excavation shall not be reused unless acceptable to the Engineer. In all cases where paved surfacing is to be cut, the Contractor shall neatly saw-cut each side of the area to be removed. Wherever a saw-cut falls within 3 feet of an existing joint, the existing surfacing shall be removed and replaced, contiguous to the joint. Cut and replacement operations shall include removal and disposal of existing surfacing and all other materials considered not reusable. Disposal of such materials shall meet the requirements of local and state agencies having jurisdiction. Payment for disposal shall be included in the contract unit prices provided in the proposal. 2.0 BITUMINOUS PAVEMENTS Type S-1Asphatic Concrete may be substituted for any other type of mixture where the rate of application is not less than 75 lbs. per square yard per inch of thickness. 2.1 WEATHER LIMITATIONS The mixture shall be spread only when the surface upon which it is to be laid has been previously prepared, is intact, firm and properly cured and is dry. The mixture shall be spread only when the air temperature is 40º F and above. The mixture shall not be spread during rain, or immediately following rain, or if the threat of rain is likely to the extent that operations would have to be discontinued. 2.2 PREPARATION OF THE MIXTURE The asphaltic mixture shall be batch prepared by blending aggragates, hot asphalt bitumen, and minimal filler when required, all proportional at the correct temperature and mixing time to produce the required job mix formula specified. A current FDOT approved mix may be submitted to the Engineer for approval. CUT, REMOVAL, AND REPLACEMENT OF 290-1

3 2.3 TRANSPORTING THE MIXTURE Use only tight vehicles, previously cleaned of all foreign material and water with inside surfaces, thinly coated with an approved emulsion containing not more than 5% of oil. Each load shall be covered during cool and cloudy weather and at any time there is a probability of rain. The mixture shall be within the range of 230ºF to 310ºF when discharged into the transporting vehicle and shall not vary more than +/- 25% from the temperature tolerance of the job mix formula at the job site. 2.4 PLACING THE MIXTURE Prior to laying the mixture the surface of the base shall be cleaned of all loose deleterious material and a tack coat applied at the rate of 0.2 gal per square yard. Saw cut edges of existing pavement shall be well coated with tack prior to laying the mixture. Use AC-5, RS-1 or RS-2 at 140ºF to 180ºF. Whenever possible the mixture shall be applied with an approved mechanical spreader to the full width required, struck-off to such loose depth that, when the work is completed the specified thickness will be secured with no leveling required. Use hand spreading and finishing in areas where the use of a spreader is impossible or impracticable only. 2.5 COMPACTION AND DENSITY The Contractor shall select the rolling equipment (either vibratory or static) necessary to achieve the required density before the internal pavement temperature has dropped below 175ºF. Areas which are inaccessible to a roller shall be compacted by the use of hand tamps or other satisfactory means. Whenever required by the Engineer, density requirements will be in accordance with FDOT specifications Table and 330-3, but in no case shall fall below 96% for Type S mixtures. 2.6 SURFACE REQUIREMENTS The Contractor shall be responsible for obtaining a smooth surface on all replaced pavement surfaces that very closely match existing surfacing when adequately cured. The finished surface shall be of uniform texture and compaction. CUT, REMOVAL, AND REPLACEMENT OF 290-2

4 3.0 CONCRETE PAVEMENTS The concrete shall be composed of a mixture of Portland cement, fine and course aggregate and water, and where specified or allowed may include approved admixtures. Unless otherwise modified in the plans or specifications or standard details, the required minimum 28-day compressive strength for the various classes of concrete shall meet the following FDOT Specifications. Class I Class II Class III 2500 psi 3400 psi 5000 psi Generally, concrete pavement replacement shall be Class I except where otherwise directed by the Engineer. 3.1 READY-MIXED CONCRETE Wet batches of concrete may be transported in agitating drum mixers actuated by a power source independent of the truck engine. Drum rotation shall be controlled independently of truck speed. Truck mixers of the revolving drum type shall be equipped with revolution counters and a water supply system and volumetric water gage. Except as otherwise directed by the Engineer, all concrete pavement replacement shall be ready-mixed concrete. 3.2 WEATHER LIMITATIONS Concrete pavement replacement operations shall not be allowed when the atmospheric temperature is below 40ºF, during rain, or immediately following rain, or if the threat of rain is likely to the extent that operation would have to be discontinued. In any case, only the amount of concrete required for immediate use shall be mixed. If any concrete has developed initial set it shall be discarded. 3.3 PLACEMENT OF CONCRETE Prior to ordering concrete, all forms must be installed properly leveled and aligned, all reinforcement in place where required and subgrade properly compacted, all to the satisfaction of the Engineer or his designated representative. If subgrade compaction is questionable, densities may be required prior to concrete placement at the Contractor s expense. Concrete shall be distributed on the subgrade to such depth that, when consolidated and finished will attain a level equal to the adjacent pavement with no apparent feel of a difference in elevation. CUT, REMOVAL, AND REPLACEMENT OF 290-3

5 3.4 FINISHING CONCRETE Immediately after the placing, the concrete shall be struck-off, consolidated and finished to produce a finished surface conforming to the cross-section, width, length, and surface finish required by the plans or standard details or these specifications. Generally, hand methods will be required for strike-off, screeding, floating, removal of laitance, and final surface finish. After finishing, the concrete shall be protected from the elements with wetted burlap and visqueen and from vehicular and pedestrian traffic with barricades having flashing lights for nighttime use. The freshly placed concrete shall be continuously cured for a period of 72 hours prior to removal of the wetted burlaps and barricaded, unless otherwise approved by the Engineer. The finished surface of the concrete shall be uniform in appearance, free from voids and other irregularities, true to lines and elevations (when provided on the plans) and conform to any adjacent surface as nearly as possible. 4.0 MEASUREMENT AND PAYMENT Replacement of paved surfaces shall be paid for on an area basis, which include pavement and base materials. For bituminous and concrete surfacing, measurement will be the length multiplied by the width not to exceed 3 feet for pipelines up to and including 12-inch diameter. For pipelines larger than 12-inch diameter, the width shall not exceed 2 pipe diameters plus the pipe diameter. For bituminous surfacing, the replacement thickness shall be 2 times the existing pavement thickness up to a maximum of 4 inches total. For concrete surfacing, the replacement thickness shall be equal to the existing concrete surfacing thickness. Reinforcement will be equal to or greater than existing reinforcement. The contract unit price, as provided in the proposal, shall be full compensation for all the work specified under this Section as follows: Cut & Replace Bituminous Surfacing Cut & Replace Concrete Surfacing per square yard per square yard CUT, REMOVAL, AND REPLACEMENT OF 290-4