Quality Assurance & Quality Control Standards (ASTM - CRSI - ACI)

Why have bending Codes?

Within the ASTM codes for the manufacture of the high tensile deformed reinforcement steel, there are varying grades of steel (e.g. A615, A616, A617), and for each of these grades the correct bending radius must be applied.

Considerable testing has shown that when the bending radius on a high tensile steel rebar is too accurate, then stress fractures occur in the steel. These fractures change the electrochemical make-up of the steel, allowing corrosion to commence earlier and at a faster rate. When bars are bent using the correct radius, this problem is eliminated.

Standard Bar Weights - Standard Bar Length 12M
Nominal Diameter (MM) Nominal Weight (Kg/M) No. of Bars/Ton Kg/Bar S. Aramco Standards Mandrel dia.(MM) A.C.I. Standard Mandrel dia.(MM)
8 0.395 211 4.740 64 48
10 0.617 135 7.404 80 60
12 0.888 94 10.656 96 75
14 1.210 69 14.520 112 84
16 1.580 53 18.960 128 96
18 2.000 42 24.000 144 108
20 2.470 34 29.640 160 120
22 2.980 28 35.760 176 132
25 3.850 22 46.200 200 150
28 4.830 17 57.960 224 224
32 6.410 13 76.920 256 256

Correct Bending Codes can save on Steel Costs

If you take two lengths of steel and bend one of them using the correct ACI bend radius (as shown in the table above) and the other with a more acute bend radius, the ACI bar will be shorter. While the amount of steel saved on one length may be small, if applied throughout a project, the saving is significant.

Bar Bending Mandrels for Coated Rebars

Procoat has a comprehensive stock of Nylotron mandrels to use with epoxy-coated rebars. Nylotron is a hardwearing material that will not damage the coating when used in the bar bending process.

Resources

  • Quality policy statement
  • Certificate of PVC coating tie wire specification
  • Two-part epoxy touch-up kit for fusion bunded epoxy coating rebars
  • Two-part touch-tp kit for fusion bunded epoxy coating rebars