617.01 Description.
616.03 Construction Requirements.
a.Subgrade . Subgrade shall be finished and compacted to the section as shown on the plans or as designated. Side forms and t ransverse forms of the size and shape necessary to secure the desired section shall be placed prior to the placing of the mix and at such intervals which will insure a true finished grade and section by screeding with a straightedge.
b.Mix. The mix shall be one part Portland cement and six parts, by loose moist volume, local sand or sand-gravel and shall be mixed in an approved concrete mixer or by approved hand methods to a consistency dry enough to stand on the slopes without subsequently settling and s loughing, and tamped, rough graded, and finished by means of a hand float. After screeding, the surface shall be finished by hand float methods.
c.Curing . As soon as the soil cement has hardened sufficiently to prevent marring of the surface, and not later than the morning following its placement, it shall be cured for a period of 72 hours using one of the methods provided in Article 450.03.
d.Joints . Transverse expansion joints shall be constructed at maximum intervals of 40 feet {12 m}. They shall be filled with either preformed joint filler or acceptable yard lumber board of 1 inch {25 mm} (nominal size) pine, S4S. The finished surface shall be scored transversely with a grooving tool to a depth of at least 1/2 inch {13 mm} so as to form a weakened pl ane joint at intervals of 6 feet {2 m}.
e.Toe Walls . Toe walls shall be constructed across the ends of each flume as follows: On upper end a toe wall of 6 inches {150 mm} in thickness and 12 inches {300 mm} in minimum depth below subgrade of the flume; o n the lower end a toe wall 6 inches {150 mm} in thickness and 12 inches {600 mm} in minimum depth below subgrade.
f.Solid Sod Strip . A strip of solid sod shall be placed along each edge of the flume.
616.04 Method of Measurement.
Accepted soil cement flu me will be measured in square yards {square meters}, complete in place, along the finished top surface both longitudinally and transversely and computed to the nearest 0.1 square yard {0.1 m²}.
616.05 Basis of Payment.
a.Unit Price Coverage . Accepted Soil Cement Flume, measured as provided above, will be paid for at the contract unit price per square yard {square meter}, complete in place, which shall be payment in full for excavating and preparing the subgrade and foundation bed, furnishing a nd erecting forms, furnishing all materials, mixing and placing the mix, curing, backfilling, and for all other materials, tools, labor, and incidentals 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.
b.Payment will be made under Item No .: 616-A Soil Cement Flume - per square yard {square meter} BITUMINOUS TREATED GLASS FIBER FLUMES
617.01 Description.
This Section shall cover the work of furnishing and placing a layer of bituminous tre ated glass fibers on planted ditch slopes and other areas as shown on the plans or directed.
617.02 Materials.
617.02 Materials.
a.Glass Fibers. 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 sha ll 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
b.Bituminous Asphalt. Asphalt shall be one of the emulsified type permitted by Subitem 860.03(b)7.b and complying with the requirements noted therein.
617.03 Construction Requirements.
a.General . 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 dir ected by the Engineer. Application of the Bituminous Treated Glass Fibers shall be accomplished within 24 hours after completion of planting operations.
b.Application of the Glass Fibers . The glass fibers shall be dispersed by equipment specifically desi gned 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 f iber blanket shall be anchored into the natural ground a minimum of 9 inches {225 mm}.
c.Bituminous Treatment of Glass Fibers . 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, s o 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.
d.Maintenance . The Contractor shall maintain and repair the treated area to the satisfaction of the Engineer until final acceptance.
617.04 Method 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 m ²}. 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.
617.05 Basis of Payment.
a.Unit Price Coverage . 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 furni shing of all equipment, tools, labor, and incidentals necessary to complete the work.
b.Payment will be made under Item No .: 617-A Bituminous Treated Glass Fiber Flumes - per square yard {square meter}
618.03 Construction Requirements.
SECTION 618 CONCRETE SIDEWALKS AND DRIVEWAYS
618.01 Description.
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 p lans..
618.02 Materials.
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 .
618.03 Construction Requirements.
a.Equipment . 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 s ufficiently 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 au tomatic 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.
b.Subgrade. 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 i n 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.
c.Foundation Backfill . 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 s uch is ordered placed by the Engineer.
d.Setting Forms . 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.
e.Handling, Measuring, Proportioning, and Mixing Materials . 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.
f.Placing Concrete . 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 s ubgrade to
Source: Alabama Standard Specifications for Highway Construction, 2022 Edition. Pages 498–499 of 934.