CORRUGATIONS
506.01 Description. This item shall consist of the forming of a
corrugated rumble strip in the plastic concrete. T he corrugations shall be of the size, shape, and spacing shown on t he plans or as directed by the Engineer.
506.02 Construction Requirements. The corrugations shall be
formed in the plastic concrete at the optimum time to produce a neat and uniform finish. The corrugations shall be form ed using methods approved by the Engineer.
506.03 Method of Measurement. Corrugations will be
measured by the square yard (square meter).
506.04 Basis of Payment. Work completed and accepted and
measured as provided above will be paid for at the contract unit price bid per square yard (square meter) for Portla nd Cement Concrete Corrugations, which price shall be full co mpensation for the formation of the corrugations and for furnishin g all labor, equipment, tools, and incidentals necessary to comp lete the work. Payment will be made under: Pay Item Pay Unit Portland Cement Concrete Corrugations Square Yard (Square Meter) 373 SECTION 507 PORTLAND CEMENT CONCRETE PAVEMENT PATCHING
507.01 Description. This item shall consist of removing and
replacing portland cement concrete pavement at the locations designated on the plans or where directed by the En gineer.
507.02 Materials. The materials and proportions for concrete
patching shall comply with the applicable requireme nts of Sections 501 and 502, except that the mixed concrete shall h ave a maximum slump of 4 ″ (100 mm) and that epoxy coated tie bars and dowel bars are not required. Mix designs shall be performed b y the Contractor in accordance with Subsection 501.03. Quality control and acceptance testing shall be according to Subsection 501.04, except that compressive strength will be determined by cyl inders obtained according to AASHTO T 23 and that coring will not b e required to determine pavement thickness. Thickness will be de termined immediately prior to placing the concrete for the p avement patch. Each dowel bar shall be coated from one end for a m inimum distance of 2" (50 mm) greater than half the length of the bar with a film of epoxy, plastic, epoxy paint, zinc chromate primer, zinc strontium phospho-silicate primer, red oxide primer , or tar paint. When bar coatings are found to be damaged prior to or during installation in the pavement, such bars shall be re placed with acceptable bars at no cost to the Department. Materials for securing tie bars and dowel bars shal l be listed on the QPL.
507.03 Construction Requirements. The construction
requirements for Removal and Disposal of Concrete P avement shall comply with Subsection 202.03 and the following: The existing pavement to be removed shall be sawed the full depth of the slab as shown on the plans. If necess ary and approved by the Engineer, one additional cut may be made to facilitate removal. Overcutting beyond the limits of the area to be removed shall be held to a minimum. All overcuts shall be thoroughly cleaned of saw slurry and other contaminants and co mpletely filled with a low viscosity epoxy compound. After sawing, the pavement to be removed shall be c arefully lifted out in a manner that will not damage the exi sting pavement 374that is to remain or the existing base material. A ny damage shall be repaired to the satisfaction of the Engineer at no cost to the Department. The material removed shall be placed i n locations that will not cause a hazard to motorists and shall be r emoved from the project site by the end of each day's work. Before placing the patch, any loose base material s hall be removed. If the existing base material is granular , it shall be recompacted as necessary. The Contractor shall take all precautions necessary to ensure that the base material remains dry until the new concret e is placed. The construction methods for Portland Cement Concre te Pavement Patching shall comply with Subsections 501 .05 and
503.04 and the following:
a.Installation of Dowel Bars and Tie Bars. Dowel bars and tie bars shall be installed according to details in cluded on the plans. Drills used to make holes shall be held in a rigid frame to assure proper horizontal and vertical alignment. The equi pment shall be operated so as to prevent damage to the pavement be ing drilled. The drilling procedure shall be approved by the Enginee r. When using a resin anchoring system, the bars shall be installed according to information provided by the manufacturer. To secur e the bars, special care must be taken to ensure that the filli ng system completely surrounds the bars and fills the holes. The filling system shall be an injection type syste m approved by the Engineer that will ensure that sufficient mater ial is injected into the hole before the bar is inserted.
b.Joints. Joints shall be constructed according to details shown on the plans. Joints that will require sawing and sealing shall be re- established as soon as possible to prevent random c racking.
c.Patches. The initial areas to be patched will be marked by the Engineer. If there are subsequent pavement or patc h failures in the initial patching phase, not due to the Contractor's negligence, they shall be repaired and will be paid for under the ap propriate bid item. At this time, the item of patching will be consider ed to be completed. Completed patches, and areas of the existing paveme nt adjacent to a completed patch, that are found to contain cra cks or other 375 damage due to Contractor negligence shall be remove d and replaced at no cost to the Department. Full depth side forms shall be used to form the sho ulder edge of concrete patches. Shoulder areas adjacent to completed pavement patch es shall be repaired full depth with ACHM Surface Course meetin g the requirements of Section 407 or Asphalt Concrete Col d Plant Mix meeting the requirements of Section 411 of the Spec ifications. Asphalt repairs shall be accomplished prior to open ing the lane to traffic. All loose material and formwork shall be r emoved from the shoulder area prior to placing the asphalt material . The Asphalt Concrete Mix shall be placed, compacted and finishe d to a uniform grade to eliminate any drop-off along the concrete pavement edge and to match the slope of the existing shoulder. The completed patch shall show no deviation in exce ss of 1/8 ″ (3 mm) when checked with a 10 ′ (3m) straightedge, including overlapping half of the length of the straightedge on to the existing pavement. The patch will then be finished in accor dance with Subsection 501.05(k)(5).
d.Equipment. Hand methods of spreading, consolidating, and finishing will be permitted, provided that satisfac tory results are obtained.
e.Measuring Materials and Mixing . The Contractor may elect to use a mobile, continuous volumetric mixer at the patching location in lieu of a batch plant equipped with an automatic ticket printer as described in Subsection 501.05(c). A mo bile, continuous volumetric mixer is defined as a truck mounted syst em where each component is automatically proportioned out for a s elected batch size from on-board storage bins and automatically f ed into a mixing unit to produce a mix complying with the requiremen ts of Subsection 507.02. The unit shall be calibrated ac cording to the manufacturer’s recommendations by the Contractor in the presence of the Engineer before any placements are made on t he project. Copies of all calibration forms/calculations shall be submitted to the Engineer. A trial batch of at least 2 cubic yards shall be pr oduced from the mobile, continuous volumetric mixer prior to placem ent of any patches on the project. The trial batch shall be a ccomplished by the Contractor under the observation of the Engineer. Trial batches will 376 be sampled and tested by the Engineer to determine compliance with the specifications of the mix produced from the mob ile, continuous volumetric mixer for slump, air content, and compre ssive strength.
507.04 Method of Measurement. Removal and Disposal of
Concrete Pavement and Portland Cement Concrete Pave ment Patching will be measured by the square yard (squar e meter).
507.05 Basis of Payment. (a) Removal and Disposal o f
Concrete Pavement for Patching. Work completed and accepted and measured as provided above will be paid for at the contract unit price bid per square yard (square meter) for Remova l and Disposal of Concrete Pavement for Patching, which price shal l be full compensation for sawing, removing, and satisfactori ly disposing of the concrete pavement and any underlying base mater ial as directed; for cleaning and filling all overcuts; and for all labor, equipment, tools, and incidentals necessary to complete the wo rk.
b.Portland Cement Concrete Pavement Patching. Work completed and accepted and measured as provided abo ve will be paid for at the contract unit price bid per square yard (square meter) for Portland Cement Concrete Pavement Patching of t he thickness specified, which price shall be full compensation f or preparing the existing base material; for furnishing, transportin g, and placing materials, including reinforcing steel for pavement , tie bars, dowel bars, and materials for anchoring tie bars and dowe l bars; for preparation and processing of materials; for mixing , spreading, vibrating, finishing, and curing concrete; for perf orming mix designs and quality control and acceptance sampling and tes ting; and for all labor, equipment, tools, and incidentals necessary to complete the work. Adjustment for Additional Thickness. Where the thi ckness of Portland Cement Concrete Pavement Patching is in ex cess of the specified uniform thickness (U.T.) plus 1" (25 mm), payment will be made for the percentage in excess of this amount. Payment will be made as follows: /g1827/g1856/g1856/g4593/g1864/uni002E/g1845/uni002E/g1851/uni002E/g3404/g1827/g1874/g1859/uni002E/uni0009/uni0009/g1830/g1857/g1868/g1872/g1860 /g3398 /g4666/g1845/g1868/g1857/g1855/uni002E/g1847/uni002E/g1846/uni002E/g3397/uni0031/uni0022/g4667 /g1845/g1868/g1857/g1855/g1861/g1858/g1861/g1857/g1856/uni0009/g1847/uni002E/g1846/uni002E/uni2217 /g1840/g1867/g1870/g1865/g1853/g1864/uni0009/g1845/uni002E/g1851/uni002E OR /g1827/g1856/g1856/g4593/g1864/uni002E/g1871/g1869/uni002E/g1865/uni002E/g3404/g1827/g1874/g1859/uni002E/uni0009/uni0009/g1830/g1857/g1868/g1872/g1860 /g3398 /g4666/g1845/g1868/g1857/g1855/uni002E/g1847/uni002E/g1846/uni002E/g3397/uni0032/uni0035/uni0009/g1865/g1865 /g4667 /g1845/g1868/g1857/g1855/g1861/g1858/g1861/g1857/g1856/uni0009/g1847/uni002E/g1846/uni002E/uni2217 /g1840/g1867/g1870/g1865/g1853/g1864/uni0009/g1871/g1869/uni002E/g1865/uni002E 377 (c) Joints. When Joint Rehabilitation under Section 509 is included as a pay item in the Contract, joints in c oncrete pavement patches will be measured and paid for under Section 509. When Joint Rehabilitation under Section 509 is not inclu ded as a pay item in the Contract, sawing and sealing of joints in co ncrete pavement patches will not be paid for separately, but full c ompensation therefor will be considered included in the contrac t unit price bid for PCCP Patching. Payment will be made under: Pay Item Pay Unit Removal and Disposal of Concrete Square Yard Pavement for Patching (Square Meter) Portland Cement Concrete Pavement Square Yard Patching (__" [__mm]Uniform Thickness) (Square Mete r) SECTION 508 VACANT
Source: , Edition.