508Reinforced Concrete Slope Paving

Reinforced Concrete Slope Paving

508.1DESCRIPTION

1 This section describes the requirements for constructing reinforced concrete slope paving.

508.2MATERIALS

1 Provide materials in accordance with the following:

Material Subsection

Admixtures 801.4 Aggregate for Concrete 803 Aggregate for Flowable Backfill

Curing Materials 802.1 Epoxy Resin Bonding Compound 810.6 Fly Ash 801.2 Joint Fillers and Sealers 807 Portland Cement 801.1 Reinforcing Steel 811.1 Water 814.1

508.3EQUIPMENT

1 Ensure that equipment meets the following requirements:

Equipment Subsection Batch Plant 513.3.1 Mixers 513.3.2 Placing and Finishing Equipment 513.3.3

2 Machine-mix flowable backfill materials in a rotary drum or other approved mixer capable of thoroughly dispersing all ingredients throughout the material.

508.4CONSTRUCTION

508.4.1 Slope Preparation

and compact thoroughly to the required embankment density as specified in

Reinforced Concrete Slope Paving SECTION 508

Subsection 203.4.3, Embankment and Cut Areas with Moisture and Density Control. Shape the slope to the bottom plane of the paving.

to the lines indicated or as approved by the engineer. If necessary to ensure neat lines after reconstruction, saw-cut construction joints 1 in [25 mm] deep. Removed concrete becomes the property of the contractor.

Fill voids beneath removed and adjacent slope paving with flowable backfill in accordance with Subsection 206.4, Construction; use a material consistency and placement method that will not result in voids or segregation. Place flowable backfill in maximum lifts of 24 in [600 mm], with each lift obtaining its initial set before placement of subsequent lifts. Fill voids to match the bottom plane of existing paving without leaving a surface that would cause a new slope paving section thinner than specified. Cure at least 24 hours before placing new slope paving.

508.4.2 Placing, Finishing, and Curing Concrete

1 Use class A concrete in accordance with Subsection 513.4.4, Mix Design. Form, place, and cure in accordance with applicable portions of Section 513.4, Construction. Float-finish in accordance with Subsection 513.4.12, Finishing Concrete Surfaces.

2 When placing slope paving as a repair or modification, first clean the surfaces of the existing concrete abutting the new concrete and coat with epoxy bonding compound. Place welded wire fabric and lap with the exposed, existing wire fabric. Place new concrete while the epoxy bonding material is still tacky. If the epoxy is no longer tacky, remove any surface contaminates and reapply. If existing joint filler was removed, place new ½ in [12 mm] joint filler with elastic joint sealer in new slope paving. Match the top surfaces of new and existing concrete.

508.5MEASUREMENT and PAYMENT

508.5.1 General

1 The engineer will measure Reinforced Conc Slope Paving and Slope Paving Repair/Modification by the square yard [square meter] of surface area, including the outside face of cut-off walls. Measurements will be made parallel to the surface. No deduction will be made for the areas taken up by the intersection of columns or piling with the slope paving.

Reinforced Concrete Slope Paving SECTION 508

2 The department will pay as follows:

Pay Item

Pay Unit Measure to the Nearest Pay to the Nearest Reinforced Conc Slope Paving SY [m2] 0.1 ft [0.05 m] SY [m2] Slope Paving Repair/ Modification SY [m2] 0.1 ft [0.05 m] SY [m2]

508.5.2 Referenced Sections for Direct Payment

1 When specified, the engineer will measure and pay for flowable backfill in accordance with Section 206, Excavation and Backfill for Culverts.