Content text 321216-Bituminous Concrete.pdf
BITUMINOUS CONCRETE PAVEMENT AND MARKINGS 32 12 16 - 3 2.02 GRANULAR FILL A. Conform to the requirements of Article M.02.06 Grading A, Form 819. PART 3 - EXECUTION 3.01 INSPECTION A. Verify that all existing utility openings, valves, and other project installations are at their proper finished grade elevations, within areas to be paved. Provide temporary closures and protection over openings until completion of rolling operations. Remove closures at completion of the work. Set covers to grade, flush with the surface of the adjoining pavement. 3.02 SUBGRADE PREPARATION A. Prior to placing the bottom course of processed stone aggregate base, the prepared subgrade shall be maintained true to line and grade, at all times for a minimum distance of 200 feet in advance of the work. No placement of the processed aggregate is to commence until acceptance by the Engineer of the subgrade on which it is to be placed. B. The formation and protection of subgrade shall conform to the requirements of Article 2.09.01 and 2.09.03, Form 819. 3.03 BASE COURSE MATERIAL PLACEMENT/COMPACTION A. Install granular fill at the locations as shown on the Drawings and in accordance with Conn DOT Form 819. Dimensions specified are after compaction. B. Compact base material with vibratory roller to minimum 95% modified AASHTO laboratory density (ASTM D-1557, Method C). C. Insure thorough and proper compaction around all yard drains, catch basins, structures, utility valves, and other improvements that project above base material. 3.04 BITUMINOUS CONCRETE PAVEMENT A. General 1. Install the bituminous concrete pavement to the lines, grades, and details shown on the Drawings. Neatly and cleanly meet and match abutting pavements. Remove all soft or yielding material below grade and replace with suitable material. 2. Thicknesses after compaction shall conform to the details on the Drawings. The pavement shall consist of the number of courses and thickness as detailed. Remove and replace areas showing deficiencies in required thickness with new material as directed by the Engineer.
BITUMINOUS CONCRETE PAVEMENT AND MARKINGS 32 12 16 - 4 3. Protect existing abutting pavement during paving operations. Replace any abutting pavement damaged during paving operations. Joint between bituminous pavement and existing portland cement concrete pavement shall be tightly compacted and pavement edge shall be of equal density to other areas of pavement. 4. Provide a cross-pitch of 1/4" per foot for proper drainage. Ensure that there are no “low” spots that may trap water and create a slipping hazard. B. Forms 1. Provide wood edge forms of an approved type and a minimum length of ten (10) feet for tangents and curves, unless otherwise shown on the plans. Wood forms shall be of a depth equal to the depth of the pavement and shall be securely staked and braced to the required line and grade. Note: Hand tamp edges and bevel if wood forms are not used. 2. Install wood forms along all edges of pavement to produce a clean vertical edge. Secure strips to allow for proper compaction of bituminous concrete. Do not remove edge screed strips until pavement is thoroughly compacted. Raveled edges will not be accepted. Wood forms are to be removed after the bituminous pavement has completely set. 3. All forms shall be straight, free from bends and warps at all times, and shall be cleaned thoroughly and oiled before pavement is placed against them, this cleaning and oiling being repeated daily as the forms are moved ahead. 4. The forms shall rest firmly upon the thoroughly compacted sub-grade throughout their entire length, shall be joined neatly and tightly and staked securely to line and grade, three (3) bracing pins or stakes, each ten (10) foot length of side form, so that they will resist the pressure of the pavement and the impact of the roller without springing. C. Placing 1. Bituminous concrete pavement shall be constructed and compacted in conformance with CT DOT Form 818 requirements. 2. Coat the edge of all abutting pavement with tack coat before installing bituminous concrete pavements. Insure that the abutting pavement has a sound, clean, straight edge. Feathering of edges and transitions between new and existing pavements is not acceptable. Protect surfaces of abutting pavement from tack coat overspray. 3. Each mixture shall be furnished and laid by means of a mechanical spreader of approved design to a depth which after final compaction shall be equal to the specified depth. In areas where the use of a mechanical spreader is impractical, as determined by the Engineer, other means of spreading and compacting may be permitted. The use of hand rakes will not be permitted. The Contractor shall use lutes where necessary.
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