C ONCRETE SLOPE PAVING DE SCRIPTION 611.
01.01 General. This work consists of constructing concrete slope paving.
M ATERIALS 611.
02.01 General. Material shall conform to the following Section and Subsection:
Portland Cement Concrete ..................................................................................................................................................... Section 501 Grout and Mortar Aggregate .................................................................................................................................... Subsection 706.03.04 C oncrete shall be Class A or Class AA concrete as shown in the proposal. Class D may be substituted for Class A concrete or Class DA may be substituted for Class AA concrete. I n addition to the requirements of S ection 501, include the proposed fibers to be used in the trial batches for mix design approval except as follows: F or concrete slope paving quantities of 30 m3 (40 yd3) or less, the addition of fibers in the trial batches for mix desig n approval is waived. F ollow the manufacturer’s recommendation for the addition of Type I and Type II fibers. For Type III synthetic or polypropylene fibers, add at a rate of 0.89 kg/m3 (1.5 lb/yd3) of concrete. H eader boards consisting of 38 mm by 89 mm (Standard 2 x 4) redwood lumber shall be commercial grade heart redwood, S4S. N ails used in construction of header boards shall be commercial quality galvanized nails. 611.
02.02 Fibrous Concrete Reinforcement. (a) Fiber Types. The fiber reinforcement shall conform to the
classifications of Type I Steel Fiber, Type II Glass Fiber, or Type III Synthetic Fiber as described in ASTM C1116. S elect steel fibers, glass fibers, or synthetic fibers with physical and chemical properties recommended in ACI 544.1R. (
b.Certificates. Ascertain that all required tests have been made by approved testing laboratories. F urnish a written certification that all required tests have been satisfactorily completed and that the materials and fabrication thereof comply with all the requirements. CO NSTRUCTION 611.
03.01 Earthwork. Form the subgrade for paved ditches and slope paving by excavating to the required
depth below the prepared finish surface grade. C ompact the subgrade to not less than 95% of the maximum density as determined by Test Method No. Nev. T108. The in- place density will be determined by Test Method No. Nev. T102 or T103. R emove any soft, spongy, or other unsuitable material to such depth as directed and backfill with suitable material and compact. Sp rinkle water on the subgrade during compaction. S ufficiently moisten the subgrade before placing concrete to prevent absorption. E xcavations for slope paving, trenches, footings, cutoff walls, etc., shall conform to Sections 203 and 206. Gradation and compaction requirements on backfill will not apply. 611 CONCRETE SLOPE PAVING
611.03.02 General. Install header boards to conform to the grades of the slope paving, to the dimensions,
spaces, and layout shown on the plans. Hold header boards in position with stakes of suitable size and length as shown on the plans. Construct slope paving with expansion joints where shown on the plans. Do not place slope paving against frosted or frozen surfaces. Add integral color pigment to all concrete or mortar surfaces for slope paving, except that used in ditch lining. The color pigment shall consist of a synthetic mineral oxide specifically manufactured for coloring concrete. Obtain the integral concrete coloring by mixing the pigment material with the Portland cement, aggregates, fibers, an d water in a sequence and by methods that will result in a uniform mixture. The color of the finished slope paving surfaces shall conform to Federal Standard Color No. 30324 as shown in Table I of Federal Standard No. 595B. Minor deviations in color and t int will be acceptable. Before placing slope paving, construct sufficient test panels of at least 1.2 m (4 ft) by 1.8 m (6 ft) for approval of the proper color and texture. Construct the panels at the construction site and place by the method to be used i n placing slope pavement. Add fibrous concrete reinforcement to concrete materials at the time the concrete is batched in amounts in accord with the approved mix designs for slope paving. Mix concrete in strict accord with fiber reinforcement manufacturer ’s instructions and recommendations for uniform and complete distribution. Tamp concrete, after spreading, until it is thoroughly compact and mortar flushes to the surface. If the slope is too steep to permit the use of concrete sufficiently wet to flush with tamping, the concrete may be tamped until consolidated and a mortar surface 6 mm (1/4 in.) thick troweled on immediately. The mortar shall consist of 1 part Portland cement and 3 parts of mortar aggregate by volume. The mortar surface shall be considered as a part of the concrete. After striking off to grade, hand float the concrete with wooden floats not less than 100 mm (4 in.) in width and not less than 750 mm (30 in.) in length. Take care to prevent rotary marks of the hand floats. Edge joints wi th a 6 mm (1/4 in.) radius edger before brooming the surface. Broom the entire surface with a fine texture hair push broom to produce a uniform surface and eliminate float marks. Broom when the surface is sufficiently set to prevent deep scarring and accomplish by drawing the broom down the slope leaving the marks parallel to the edges of the panel . Protect concrete during placing and curing as set forth in Section 501. METHOD OF MEASUREMENT
611.04.01 Measurement. Concrete slope paving, including concrete aprons and cutoff walls, will be measured
by the cubic meter (cubic yard). The quantity will be computed from measurements of the actual areas placed based on the theoretical thickness shown on the plans. BASIS OF PAYMENT
611.05.01 Payment. The accepted quantities, measured as provided above, will be paid for at the contract
price per unit of measurement for the pay item listed below that is shown in the proposal. Payment will be full compensation for the work prescribed in this Section. Paymen t will be made under: Pay Item Pay Unit (class) Concrete Slope Pavement ..................................................................................................................... Cubic Meter (Cubic Yard) SECTION 613 CONCRETE CURBS, GUTTERS, AND SIDEWALKS DESCRIPTION
613.01.01 General. This work consists of constructing curbs, gutters, sidewalks, ramps, local depressions,
driveways , and detectable warnings. MATERIALS
613.02.01 General. Material shall conform to the following Sections:
Portland Cement Concrete ................................ ..................................................................................................................... Section 501 Concrete Structures ................................ ............................................................................................................................... Section 502 Reinforcing Steel ................................ .................................................................................................................................... Section 505 Concrete shall be Class A or Class AA concrete as shown in the proposal. Class D may be substituted for Class A concrete or Class DA may be substituted for Class AA concrete. The epoxy adhesive used to bond concrete curbs to new or existing pavements shall conform to AASHTO M235 (ASTM C881), Type I, Grade 1, 2, or 3 — Class A, B, or C. Use detectable warnings listed in the QPL. Red colored detectable warnings shall be installed in concrete surfaces. Green colored detectable warnings shall be installed in asphalt surfaces. CONSTRUCTION
613.03.01 Earthwork. Construct the subgrade true to grade and cross section. Water and roll or hand tamp
subgrade to the required compaction for the adjacent roadway or base course. Remove all soft and spongy material to a depth of not less than 150 mm (6 in.) below subgrade elevation for curbs, gutters, local depressions, and dr iveways and 75 mm (3 in.) below for sidewalks. Fill the resulting space with earth, sand, or gravel of a quality that, when moistened and rolled or tamped, will form a firm and solid foundation. Test the completed subgrade for grade and cross section by m eans of a template extending the full depth and supported on the side forms. Thoroughly water the subgrade and forms in advance of placing concrete.
613.03.02 Existing Curbs, Gutters, and Sidewalks. Where the limits of the new work fall within reasonabl e
distance to existing scoring lines or expansion joints, remove existing concrete to those scoring lines or expansion joints if directed. Where the limits of the new work do not fall within reasonable distance to existing scoring lines or expansion joints , saw cut the limits of the new work and remove existing concrete to the saw cut lines.
613.03.03 Forms. The depth of forms for curbs shall be equal to the full depth of the curb. The depth of outside
forms for concrete gutters shall be equal to the full thickness of the gutter. Timber forms shall be surfaced on the side placed next to the concrete, have a true smooth upper edge, and be not less than 38 mm (1 1/2 in.) thick. Do not use warped forms or forms not having a smooth, straight upper edge. Use benders or thin plank forms, rigidly placed, on curves, grade changes, or for curb returns. Do not use steel forms on radii less than 60 m (200 ft). Make back forms for curb returns of 12.5 mm (1/2 in.) benders, for the full height of the curb, cleated together. Carefully set forms to the alignment, grade, and dimensions required. Hold forms rigidly in place by the use of pairs of iron stakes placed at intervals not to exceed 1.2 m (4 ft). For metal forms, do not space iron stakes more than 1.8 m (6 ft) apar t. Use clamps, spreaders, and braces where required to insure rigidity in the forms. Do not remove forms until concrete has set sufficiently to prevent distorting or cracking. Clean forms thoroughly each time they are used and coat with a light oil as of ten as necessary to prevent the concrete from adhering to them.
Source: Nevada Standard Specifications for Road and Bridge Construction, 2014 Edition. Pages 347–348 of 610.