614Erosion Control Concrete

Erosion Control Concrete

614.1DESCRIPTION

1 This section describes the requirements for concrete invert paving and erosion control concrete.

614.2MATERIALS

1 Provide materials in accordance with the following:

Material Subsection Admixtures 801.4 Aggregate for Concrete 803 Asphalt Mastic for Field Coating 804.5 Curing Materials 802.1 Fly Ash 801.2 Portland Cement 801.1 Reinforcing Steel 811.1 Water 814.1

614.3EQUIPMENT

1 Ensure that equipment meets the following:

Equipment Subsection Batch Plant 513.3.1 Mixers 513.3.2 Placing Equipment 513.3.3

614.4CONSTRUCTION

614.4.1 General

1 Perform minor grading required to place erosion control concrete in accordance with Subsection 203.4.1, Excavation and Embankment, Construction, General.

2 Use class B concrete in accordance with Subsection 513.4.4, Mix Design. The engineer may approve a local commercial mix. The department does not require a cement sample or aggregate gradation tests.

3 Mix, form, and place concrete in accordance with applicable portions of Section 513.4, Construction. Finish surfaces to a coarse texture.

Erosion Control Concrete SECTION 614 614.4.2 Invert Paving 1 On a thoroughly cleaned surface, place and screed concrete to form a paved section of designated width. Ensure that the final surface of invert paving is parallel with the flow line and level or slightly-dished transversely with the pipe centerline. Coat aluminum pipe surfaces to be invert-paved with an asphalt mastic. 614.

4.3Chutes and Stilling Basins

1 Unless the ground can be graded to a neat section with uniform grades, use forms to construct chutes, stilling basins, or similar items. Excavate the trench or basin to necessary limits and grade to the specified shape. If required to reduce flow velocity, score the surface or otherwise leave a rough surface texture. Hand-tool contraction joints at intervals of 10 ft [3 m]. Ensure a joint depth equal to at least one-third of the thickness of concrete and a width of ⅛ in [3 mm]. 614.

4.4Ditch Checks

1 When placing concrete in a trench, excavate to specified lines and grades with sides as vertical as practical. Form exposed edges above the finished grade to leave neat lines. 614.

4.5Curing

1 After finishing concrete, cure in accordance with Subsection 513.4.13, Curing Concrete. When using a curing compound, apply at a rate of 1 gal/150 ft² [1 L /3.5 m²]. 614.5 M EASUREMENT and PAYMENT 1 The engineer will measure Erosion Control Concrete by the cubic yard [cubic meter] based on batch volumes ordered and placed. 2 The department will pay as follows: Pay Item Pay Unit Measure to the Nearest Pay to the Nearest Erosion Control Concrete CY [m3] 0.25 CY [0.25 m3] 0.1 CY [0.1 m3]