1010 Page 5911010 CONCRETE REINFORCEMENT
1010.1REQUIREMENTS
A.Bar Reinforcement – Structures and Paving (excluding dowel and tie bars): Bar reinforcement for structures and concrete pavement, will conform to the requirements of AASHTO M 31 (ASTM A615) Grade 60. Bar reinforcement will be deformed, unless otherwise noted. When stainless steel deformed reinforcing bars are specified in the plans, the stainless steel deformed reinforcing bars will conform to the requirements of ASTM A955. B.Welded Wire Reinforcement: Welded wire reinforcement will conform to ASTM A1064. The optional yield strength measurement will only be required for welded wire reinforcement utilized in box culverts and prestressed concrete. C.Tie Bars: Tie bars for concrete pavement will conform to the requirements of AASHTO M 31, Grade 40, except rail steel will not be used for tie bars that are to be bent and re-straightened. Tie bars will be deformed. Tie bars will be epoxy coated conforming to Section 1010.1 E. Sawing or shearing of the tie bars to obtain the specified length will be permitted provided the coating is not damaged and the resulting bar is free from burring and other deformations. The cut ends will be coated. D.PCC Paving Dowel Bars and Dowel Bar Assemblies: The steel cores of dowel bars and plain round bars will be plain round bars conforming to AASHTO M 31 (ASTM A615) Grade 40 or 60, M 227 (ASTM A663) Grade 70 minimum, or M 255 (ASTM A675) Grade 75 minimum. The bars will be the diameter shown in the plans, free from burring or other deformation restricting slippage in the concrete. Dowel bars will be epoxy coated conforming to Section 1010.1 E. Sawing or shearing of the dowel bars will be permitted provided the coating is not damaged and the resulting bar is within the permissible deformations. The cut ends are not required to be coated. Any deformation larger than true shape will not exceed a 0.04 inch increase in diameter or thickness and will not extend more than 0.40 inch from the dowel end. Bond breakers used to pre-coat dowel bar assemblies will be one of the products from the Department’s Approved Products List. E.Epoxy Coated Reinforcement: Epoxy coatings will be applied by a plant certified by the Concrete Reinforcing Steel Institute (CRSI). A Certificate of Compliance and a copy of all quality control test results for the epoxy coating will be furnished for each shipment supplied for use on a project. Dowel bars for concrete pavements will be epoxy coated and will conform to AASHTO M 254 Type B except the film thickness will be from 5 to 13 mils after cure. All other epoxy coated reinforcement will comply with ASTM A775. 1010 Page 592F.Pretensioning Reinforcement: Pretensioning Reinforcement will conform to AASHTO M 203 (ASTM A416) and will be low-relaxation strands unless otherwise specified. 1030 Page 5931030 GABIONS
1030.1REQUIREMENTS
Gabions will be supplied in various lengths and heights. The lengths will be multiples (2, 3, or 4) of the horizontal width. The heights will be fractions (1, 1/2, or 1/3) of the horizontal width. The horizontal width will not be less than 36 inches. Gabions will be of uniform width. Gabions will be fabricated so the sides, ends, lid, and diaphragms can be assembled at the construction site into a rectangular basket. Gabions will be of single unit construction. Base, lid, ends, and sides will be either woven into a single unit or one edge of these members connected to the base section of the gabion so strength and flexibility at the point of connection is at least equal to that of the mesh. The gabion will be furnished with diaphragms the same mesh and gauge as the body of the gabions, secured in proper position on the base in such a manner that no additional tying at this juncture will be necessary. The spacing of the diaphragms will be the same as the horizontal width. All perimeter edges of the mesh forming the baskets, including end panels and top of the diaphragms, will be selvedged with selvedge wire. For sound structural integrity, the gabion mesh wires will be wrapped around the selvedge wire with a number of turns necessary to interconnect each of them with the adjacent mesh wire. For multitiered structures, the internal connecting wires will be furnished. The internal connecting wires will meet the same specifications as the wire used in the mesh. Tie wire or connecting wire will securely fasten all edges of the gabion and diaphragms to provide for four internal connecting wires in each cell one-half unit high and eight internal wires in each cell one unit high. The tie wire will meet the same specifications as the wire used in the mesh except that the tie wire may be two gauges smaller. Interlocking fasteners for galvanized gabions will be high tensile 0.120 inch diameter galvanized steel wire measured after galvanizing. The galvanizing will conform to ASTM A641 Class 3 coating. Fasteners will also be in accordance with ASTM A764, Class II, Type C. Interlocking fasteners for PVC coated gabions will be high tensile 0.120 inch diameter stainless steel wire conforming to ASTM A313, Type 302, Class I. The gabions will made of be woven wire mesh. The woven wire mesh will be made of galvanized steel wire having a minimum size of U.S. steel wire gauge #11. The tensile strength of the wire will be 60,000 to 85,000 psi when tested in accordance with ASTM A392. The minimum zinc coating of the wire will be 0.8 oz. per square foot of uncoated wire surface as determined by ASTM A90. The maximum linear dimension of the mesh opening will not exceed 4½ inches and the area of the mesh opening will not exceed 10 square inches. The wire mesh will have elasticity permitting elongation to a minimum of 10% of the length of the section of the mesh without reducing the gauge or tensile strength of individual wires to values less than those for wire one gauge smaller.