2514Slope Paving

2514.1DESCRIPTION

This Work consists of paving embankment slopes and waterways with Portland cement concrete or crushed Aggregate to provide erosion protection.

2514.2MATERIALS

Provide concrete meeting the requirements for Mix Designation 3F52, except that the Contractor may adjust the slump requirement as approved by the Engineer. Provide reinforcement bars meeting the following requirements:

Carbon-Steel Bars for Concrete Reinforcement Provide liquid asphalt, Grade MC-250, MC-800, or emulsified asphalt, Grade CSS-1, CSS-1H, RS-1, or CRS-2 for bituminous Material for stabilizing aggregate slope paving. E Aggregate Provide Aggregate for stabilized slope paving in accordance with Table 2514.2-1 for gradation class CA-1, CA-2, or CA-3, and in accordance with the quality requirements in 3137.2D, “Quality.” Table 2514.2-1 Coarse Aggregate Fraction Size, percent by weight passing square opening Sieves

Aggregate Designation CA-1 CA-2 CA-3 2 inch 100 100 — 1 1/2 inch 80 – 100 90 – 100 100 1 1/4 inch — — 85 – 100 1 inch — — — 3/4 inch 5 – 30 5 – 35 5 – 35 5/8 inch — — — 1/2 inch — — — 3/8 inch — — — No. 4 0 – 5 0 – 5 0 – 5

2514.3CONSTRUCTION REQUIREMENTS

A Foundation Preparations Prepare the foundation to the dimensions and elevations shown on the P lans or as directed by the Engineer. Excavate the high spots, and fill and compact low spots of the foundation to meet the elevation and slope requirements. Prepare the foundation with a uniform density meeting 2106.3G.2, “Quality Compaction.” For rough grading performed by others under another contract, if the Engineer determines that a Material shortage or excess exists to construct the planned foundation elevations, the Engineer may require one of the following to achieve acceptable foundation elevations:

B Stabilized Aggregate Slope Paving Use mechanical or hand methods to deposit, spread, consolidate, and shape the A ggregate to provide a uniform depth and density and to produce a uniform surface appearance . Apply liquid asphalt at a rate of 1.8 gallons per square yard and only when the ambient air temperature is at least 40°F. Apply emulsified asphalt at a rate of 2.5 gallons per square yard and only when the ambient air temperature is at least 50°F. Ensure bituminous Materials penetrate to a depth of at least half the thickness of the Aggregate slope paving as shown on the Plans. Protect adjacent structure surfaces from bituminous splatter. C Concrete Slope Paving Construct concrete slope paving in accordance with 2401, “Concrete Bridge Construction.” Place, consolidate, strike-off, and hand float the concrete to provide a dense pavement relatively free of voids and cavities, and to produce a uniform surface appearance. Set and support side forms and finish the concrete so surfaces do not deviate from a true plane and the grade shown on the P lans by greater than ±1/2 inch. Place metal reinforcement and preformed filler Material as shown on the Plans. Support the metal reinforcement and preformed filler Material as shown on the Plans to maintain correct position during concrete placement. Form and cast toe walls and side walls before placing concrete for contiguous slope paving. Moisten the Subgrade at the time of concrete placement. Take care to prevent Subgrade displacement and contamination of the concrete. Place the slope paving either in equally spaced alternate strips running in the direction of maximum slope or in full width sections with mechanical E quipment capable of placing and finishing the slope paving. Immediately after placing, consolidate and strike off the concrete. When the concrete is capable of maintaining shape, perform the following to the concrete:

After the final floating, finish edges not formed with v-strip inserts with an edging tool and cut panel lines with grooving tools. The Contractor may saw the panel lines as directed by the Engineer. Float edging and grooving flange trails to secure uniform surface appearance. Provide curing protection to exposed surfaces after completing the concrete finishing operations in accordance with 2401.3G, “Concrete Curing and Protection,” and maintain until the concrete attains a strength gain of at least 30 percent.

2514.4METHOD OF MEASUREMENT

The Engineer will separately measure slope paving of each type by area of top surface, bounded by the outside edges of abutment faces, toe walls, side walls or timber planks, as constructed and accepted for payment.

2514.5BASIS OF PAYMENT

The Contract Unit Price for slope paving of each type includes the cost of constructing the W ork complete in-place. The Department will pay for the cost of providing and placing additional Material , or the removal and outside disposal of excess Material requiring loading and hauling, directed by the Engineer, as E xtra Work in accordance with 1402, “Contract Revisions.” The Department will include the cost of excess Material disposed on areas adjoining the slope paving without loading and hauling, as directed by the Engineer, with the Contract Unit Prices for slope paving.

The Department will pay for slope paving on the basis of the following schedule: Item No. Item Unit

2514.504 Concrete Slope Paving square yard

4 Stabilized Aggregate Slope Paving square yard