00749Miscellaneous Asphalt Concrete Structures

00749.00 Scope - This Work consists of furnishing and placing asphalt concrete in road approaches,

street connections, driveways, guardrail flares, mailbox turnouts, raised traffic islands, sidewalks, footpaths, gutters, ditch linings, spillways, dikes, and other miscellaneous or minor items of asphalt concrete except asphalt curbs as shown, specified, or directed. These items in this Section will be collectively referred to as " Structure s". See Section 00480 for asphalt curbs. This Work does not include asphalt concrete const ruction on Traffic Lanes, auxiliary lanes, Shoulder s, Median areas, tapers, widenings, parking areas, exit and entrance ramps, Patching and Leveling on similar areas.

00749.02 Limited Application - This Section applies only when separate Pay Item s for the Work

appears in the Contract Schedule of Items according to 00749.91 and 00749.92, or when called for by the Special Provisions. Materials

00749.11 Aggregate Base - Furnish Aggregate base Material s for Base , foundation Course s,

Leveling Course s, and bedding meeting the requirements of Section 02630. If a designated size is not shown, or given, furnish either 1" - 0 or 3/4" - 0, as the Contractor elects.

00749.12 Asphalt Tack Coat - Furnish asphalt tack coat Material meeting the requirements of

Section 00730.

00749.13 Asphalt Concrete - Unless another class is shown, furnish Level 2, 1/2 inch ACP

according to Sections 00744 and 00745, as applicable. When conditions justify, the mixture may be varied, if approved. Acceptance will be based on testing the Engineer deems appropriate. Statistical analysis will not apply.

00749.14 Concrete - Furnish Commercial Grade Concrete meeting the r equirements of

Section 00440. Equipment

00749.20 Equipment - Provide plant and Equipment meeting the requirements of Section 00745.

Construction

00749.41 Earthwork - Make excavations and backfills for the Structure s according to Section 00330

and t o the depths, widths and Cross Sections shown, specified, or directed.

00749.42 Foundations - Construct foundations or other bedding using selected granular backfill

Material according to Section 00330 or using Aggregate Base when shown or directed. For Aggregate Base , do one of the following: • When existing Aggregate Base Materials of the kind specified in 00749.11 are already in place, salvage and reuse. • Use new Aggregate Base Materials conforming to 00749.11.

00749.43 Foundation Preparation - Bring areas on which Structure s are to be constructed to

established grade, and make firm, dry and free of Unsuitable Material before placing asphalt concrete. 00749.80 Tack contact areas where asphalt concrete is to come in contact with previously placed portland cement concrete, asphalt concrete, or bituminou s surfaces according to Section 00730.

00749.44 Placing Asphalt Concrete - Place asphalt concrete according to 00744.43(c) and

00745.46(c), as applicable, except place asphalt concrete Structure s of uniform width by either mechanical extrusion methods or between suitable forms, as the Contractor elects. Other Structure s may be constructed without the use of forms unless otherwise directed. The Engineer may allow small or special pavers, spreader boxes, or blade graders for placing asphalt concrete. Where allowed, the Engineer may allow mixture to be placed by hand methods. Construct all Structure s within the fol lowing lines and grades: • 0.08 foot of true line • 0.04 foot of established surface grade, Cross Section and Slope • 0.04 foot of specified thickness

00749.45 Compacting Asphalt Concrete - Compact asphalt concrete according to the following or

as directed: • Compaction to a specified density will not be required, regardless of thickness. Perform breakdown and intermediate rolling until the entire surface has been compacted with at least four Coverages by the rollers. Perform additional Coverages, as directed, to obtain finish rolling of the ACP. • Along curbs and walls, on walks, irregular areas, and other areas not practically accessible to rollers conforming to 00744.24 or 00745.24, compact the mix ture with small, self -propelled rollers, mechanical tampers, hot hand tampers, or hand rollers. On depressed areas a trench roller may be used, or cleated compression strips may be used under the roller to transmit compression to the depressed area.

00749.46 Pavement Smoothness - Finish asphalt concrete to a uniform texture.

Test top surfaces with a 12- foot straightedge furnished and operated by the Contractor under the Engineer's directi on. The surface shall not vary more than 1/4 inch from the straightedge except at grade changes.

00749.47 Concrete - Construct concrete curbs according to the applicable provisions of

Section 00759. Measurement

00749.80 Measurement - Work performed under this Section will be measured by one of the

methods described in 00749.81 and 00749.82. Street connections which occur at the beginning or end of the Project, or which have a line designation, Typical Section and profile, and are not noted on the Plans as being Pay Item s will not be measured for payment. The quantities of Structure s will be measured according to the following: • Unit Basis - Measurement will be the actual count of each location where the Struct ure is constructed. • Area Basis - Measurement will be the ground surface, limited to the Neat Lines of the Structure as shown or directed. 00749.81 • Length Basis - Measurement will be from end to end of the pertinent Structure along its longitudinal axis for each s eparate item or continuous run.

00749.81 Method "A" - Weight and Extras Basis - Under this method, asphalt concrete actually

incorporated into the Structure will be measured for payment according to 00744.80 and 00745.80, as applicable. In addition, me asurement will be made for extra costs of placing asphalt concrete in the Structure s if Pay Item s are included in the Contract Schedule of Items.

00749.82 Method "B" - Complete in Place Basis - Under this method, measurement will be of the

Structure complete in place. Payment

00749.90 Payment - The accepted quantities of Structure s placed under this Section will be paid for

at the Contract unit price, per unit of measurement, for the items listed in 00749.91 and 00749.92. When earthwork is included as separate Pay Item s, payment will be made according to 00330.90 through 00330.94 as appropriate. When earthwork is not included as separate Pay Item s, no separate or additional payment will b e made for earthwork. Aggregate will be paid for according to 00640.90 and 00641.90 as appropriate. Payment for street connections, or the extra costs for them, which meet the criteria described in

00749.80 will be included in payment for the Pavement items.

00749.91 Method "A" - Weight and Extras Basis - The items to be paid for under Method "A" are:

Pay Item Unit of Measurement

00749.92 Method "B" - Complete in Place Basis - The items to be paid for under Method "B" are:

Pay Item Unit of Measurement