617BITUMINOUS TREATED GLASS FIBER FLUMES

496

necessary to complete the work. Aggregate, available from the right-of-way, may be obtained by the Contractor without any charge for royalty and such material will not be included in excavation items. No direct payment will be made for toe walls. The solid sod strip will be paid for under Item 654, Solid Sod.

616-A Soil Cement Flume - per square yard {square meter} BITUMINOUS TREATED GLASS FIBER FLUMES

617.01Description

This Section shall cover the work of furnishing and placing a layer of bituminous treated glass fibers on planted ditch slopes and other areas as shown on the plans or directed.

617.02Materials

Glass fiber material used for mulching shall consist of continuous fibers drawn from molton glass, coated with a chrome-complex sizing compound; collected into strands and lightly bound together without the use of clay, starch or like deleterious substances. The glass fibers shall be formed or wound into a cylindrical package in such a manner that the glass fibers can be continuously fed through an ejector driven by compressed air and expanded into a mat of glass fibers on the soil surface. The material shall contain no petroleum solvents or other agents known to be toxic to plant or animal life. The glass fibers shall conform to the following specific requirements: Property Limits Test Method fiber diameter 0.00035 to 0.00053 inches {8.89 to 13.46 µm} ASTM D 578 yards/pound {m/kg} of fibers 340 - 600 ASTM D 578 organic content 1.65% Max. ASTM D 578 pkg. weight {mass} 30 - 45 pounds {14 - 20 kg} ASTM D 578

Asphalt shall be one of the emulsified type permitted by Subitem 860.03(b)7.b and complying with the requirements noted therein.

617.03Construction Requirements

The surface to be treated shall have been installed and prepared by one of the methods provided in Section 652, 653, or 654, unless otherwise directed by the Engineer. Application of the Bituminous Treated Glass Fibers shall be accomplished within 24 hours after completion of planting operations.

The glass fibers shall be dispersed by equipment specifically designed for the purpose of using compressed air as the moving force. The glass fibers shall be spread over the area to be treated at a rate of approximately 0.4 to .05 pounds per square yard {217 to 271 g/m²}. Where water is expected to enter the flume, the fiber blanket shall be anchored into the natural ground a minimum of 9 inches {225 mm}.

After application of the glass fibers, the area shall be treated with emulsified asphalt (undiluted) at the approximate rate of 0.25 to 0.35 gallons per square yard {1.13 to 1.58 L/m²}. After application of the asphalt and the emulsion has broken and become tacky, a light application of sand or pulverized soil shall be applied to the treated area, if so directed by the Engineer, so as to prevent adherence of objects which may come in contact with the asphalt. Care shall be taken not to apply sand or soil in an amount detrimental to the newly planted area.

The Contractor shall maintain and repair the treated area to the satisfaction of the Engineer until final acceptance. CONCRETE SIDEWALKS AND DRIVEWAYS 497

617.04Method of Measurement

Accepted Bituminous Treated Glass Fiber Flumes will be measured in square yards {square meters} computed from surface measurements to the nearest 0.1 square yard {0.1 m²}. Erosion control treatment required under the Bituminous Treated Glass Fiber Flumes will be measured and paid for under the appropriate item of erosion control ordered used.

617.05Basis of Payment

The accepted Bituminous Treated Glass Fiber Flumes, measured as noted above, will be paid for at the contract unit price bid per square yard {square meter} which shall be full compensation for the furnishing of all materials, the placing of materials and includes furnishing of all equipment, tools, labor, and incidentals necessary to complete the work.

617-A Bituminous Treated Glass Fiber Flumes - per square yard {square meter} CONCRETE SIDEWALKS AND DRIVEWAYS

618.01Description

This Section shall cover the work of constructing a portland cement concrete sidewalk or driveway. Sidewalks and driveways shall be constructed to the lines, grades, and typical cross-sections shown on the plans with or without reinforcement and in one course on a prepared subgrade. "Subgrade" in this Section shall mean the prepared foundation on which the sidewalk or driveway is constructed. Detectable warning surfaces shall be installed as shown on the plans..

618.02Materials

All materials furnished for use shall comply with the appropriate requirements of Division 800, Materials, and the following:  Concrete shall meet the requirements for a Class A concrete as provided in Section 501.  Reinforcing steel shall meet the requirements of Section 502 and plan details.  Detectable Warning Surfaces shall be selected from the Department’s List II-25, Detectable Warning Devices in the MSDSAR.

618.03Construction Requirements

The equipment used for mixing concrete shall conform to the requirements of Section 501. The Contractor may use forms or, if requested in writing and approved by the Department, an approved automatic extrusion type paving machine. Forms shall be of wood, or metal, and shall be sufficiently staked to hold them true to line and grade while concrete is being deposited against them. If of wood, they shall be 2 inch {50 mm} or 3 inch {75 mm} (nominal size) stock lumber surfaces on all sides. If of metal, they shall be of approved section having a base width of at least 4 inches {100 mm} and shall have a flat surface on top. The depth of the forms shall equal the depth of the sidewalk or driveway. Adequate means shall be provided for securely fastening the ends of forms together. Any automatic extrusion machine considered must be demonstrated to produce a consolidated concrete section conforming to the dimensions, cross-section, line, and grades shown on the plans or directed within the requirements noted herein in this Section.

All soft or other unsuitable material in the subgrade shall be removed and replaced with suitable material. All fills and filling material shall be placed and compacted by rolling with an approved roller or hand tamped with approved tamping devices in layers not exceeding 6 inches {150 mm} in thickness. Any existing areas that have been previously compacted by traffic to a greater degree than the remainder of the subgrade, shall be loosened and the whole subgrade uniformly compacted as directed. CONCRETE SIDEWALKS AND DRIVEWAYS 498

Where provided by the plans and/or proposal, foundation backfill shall be placed and constructed as provided in Section 214. No direct payment will be made for foundation backfill except when Item 214-B is provided in the proposal and such is ordered placed by the Engineer.

Forms shall be set to true line and grade and rigidly held in place by stakes or braces. Ends of adjoining form sections shall be flush. Forms and division plates shall be cleaned and oiled before placing concrete against them.

The method of handling, measuring, proportioning, and mixing concrete materials shall conform to Section 501, Structure Concrete. Where metal reinforcement is shown on the plans and/or provided in the proposal, it shall be placed in accordance with Section 502.

A template resting upon the side forms and having its lower edge at the exact elevation of the subgrade shall be drawn along the forms and the subgrade shaped true before any concrete is deposited. The subgrade shall be moist and shall be free of debris and all foreign material when concrete is deposited upon it. The freshly mixed concrete shall be placed promptly on the prepared subgrade to the depth required to complete the sidewalk or driveway in one course. It shall then be vibrated and/or tamped and struck off with an approved straightedge resting upon the side forms and drawn forward with a sawing motion. The concrete shall then be floated with a wooden float until the surface is true. Concrete laid during cold weather shall conform to the requirements given in Section 501.

The Contractor shall make any necessary transitions in the curb and gutter to match the surface of the curb ramp. These transitions shall be made according to the plan details or as directed by the Engineer.

Unless otherwise shown by plan details, the surface of sidewalks and driveways shall be marked in squares or rectangles not exceeding 36 square feet {3.5 m²} in area by using an approved marking tool. The marking tool shall provide a groove approximately 1 inch {25 mm} in depth and with rounded edges. Unless otherwise directed by the Engineer, expansion joints 3/8 of an inch {9 mm} (min.) wide shall be placed as follows:  At all curb returns and where the walks or drives join other rigid units  To line up with expansion joints of adjacent curbs, drives, etc., but in no instance more than 80 feet {24 m} between joints  Where continuous runs of walks or drives are 80 feet {24 m} or longer, transverse expansion joints shall be provided; one joint for each additional 80 feet {24 m} or fraction thereof, of length  Where walks or drives are confined longitudinally by other concrete units and the width of the walk or drive is in excess of 15 feet {5 m}, one longitudinal expansion joint will be required for each additional 15 feet {5 m}, or fraction thereof, of width.  Expansion joints shall be formed using a filler and sealer specified in Articles 832.01 and

832.02

Unless shown otherwise by plan details, the joint filler shall be from the bottom of the walks ordrives to 1 inch {25 mm} from the top; the sealer shall be 3/4 of an inch {19 mm} thick andshall be recessed 1/4 of an inch {6 mm} from the top.

Immediately after the finishing operations have been completed, the entire surface of the newly laid concrete shall be protected against rapid drying out and cured as provided in Subarticle 450.03(m), unless the Contractor elects to use Type III portland cement, in which case the total curing time will be reduced. No vehicles shall be permitted on the new concrete for seven days and pedestrians shall not be permitted thereon for at least 72 hours unless the Contractor elects to use Type III portland cement, in which case the time limit will be reduced to 24 hours for walks and four days for driveways.