4-48 Section 422
422-1 Description
Construct reinforced concrete slabs at bridge approaches, including curbs and sidewalks; furnish and place temporary slope drains ; remove existing pavement or approach slab; furnish and place concrete, reinforcing steel, joint filler, sealer and other materials; finish and cure concrete. Construct the approach slabs after the adjacent bridge deck is cast and before constructing concrete barrier rails or sidewalks.
422-2 Materials
Refer to Division 10. Item Section Curing Material s 1026 Joint Filler 1028 -1 Low Modulus Silicone Sealant 1028 -3 Portland Cement Concrete 1000 Reinforcing Steel 1070
422-3 Construction Methods
Construct the subgrade and approach fills in accordance with the contract . Apply Section 420 to all concrete except as otherwise provided herein. Use Class AA concrete. Finish and groove the reinforced concrete bridge approach slabs in accordance with
Article 420 — 14; however , for approach slabs with a length of 15 feet or less , the contractor may
submit an alternate screed type for approval. Do not groove the approach slabs when grooving the bridge deck is not required. When grooving is not required, apply a broomed texture to the approach slabs before the concrete becomes non -plastic. Cure bridge approach slabs in the same manner as specified for bridge decks in Suba rticle 420 -15(B). Temporarily cover or fill the opening in the joint at the end bent until installation of the joint seal, if applicable . Make sure that the covering or filler provides for drainage off the bridge deck and keeps debris out of the joint and off the end bent cap. When shown in the plan s, construct sidewalks on bridge approach slabs in accordance with plan details. Do not construct sidewalks until sawing the joint at the end bent. Finish the concrete in accordance with Subarticle 420- 17(D). Construct temporary slope drains in accordance with Section 1622. Locate this erosion control item as shown in the Structure plan detail. Backfill around the approach slabs as soon as practical to prevent erosion adjacent to the slab.
422-4 Measurement and Payment
The price and payment below will be full compensation for all items required to construct bridge approach slabs including, but not limited to, those items contained in Article 422 -1. Temporary Slope Drains will be paid in accordance with Article 1622 -4. Bridge Approach Slabs, Sta. ____ will be paid at the contract lump sum price. Grooving bridge approach slabs will be paid at the contract unit price per square foot for Grooving Bridge Floors as provided in Article 420 -21.