DCP (DOUBLE CORROSION PROTECTION BOLT)

DCP (Double Corrosion Protection Bolt)

DCS (Civil Plastic Grout Bell)

 

Extra High Strength BoltMinimumTypical
Yield Strength600MPa220kN650MPa240kN
Ultimate Tensile Strength850MPa310kN920kN 340kN
Calculated Sheer Strength205kN225kN
Standard Elongation13%15%
Uniform Elongation8%
Mass Per Metre2.92kg
Bar Core Diameter21.7mm
Cross Sectional Area of Bar370mm2
Major Bar Diameter23.2mm
Bar Straightness to AS 1442-1991
Rolled Thread M24x3.0mm Pitch
20mm BoltMinimumTypical
Yield Strength500MPa150kN540MPa160kN
Ultimate Tensile Strength540MPa160kN635kN 190kN
Calculated Sheer Strength100kN125kN
Standard Elongation5%20%
Tensile Strength of Threaded End140kN
Uniform Elongation12%
Mass Per Metre2.46kg
Bar Core Diameter19.5mm
Cross Sectional Area of Bar300mm2
Major Bar Diameter23.0mm
Bar Straightness to AS 1442-1991
Rolled Thread M24x3.0mm Pitch

General Features

  • The DCP Bolt is designed to be used with cementitious grouts.
  • The bolt is provided with an expansion shell for preloading, thus allowing for tunnel or mine heading to advance without immediate grouting.
  • DCP is thr mining version with a steel grout bell.
  • DCS is the civil version with a plastic grout bell.
  • Grooved anchor nut allows for grouting after preloading.
  • Anti-corrosion tube over full length of bolt for long life term protection.
  • Available in differing material forms to suit design requirements.
  • Australian Patent 2003231588.

Installation Guidelines

  • Drill 43-45mm hole diameters. The drill hole length must be longer than the bolt by approx. 50mm.
  • Domed washer plate is fitted to the bolt.
  • The bolt is inserted into the hole.
  • After placing the bolt in the hole to it’ s full length, the bolt is then rotated to set the expansion shell to the required tension.
  • Attach grouting adaptor to anchorage.
  • Mix 0.33 to 0.35 W/C grout. Pump grout. Grout is pumped through the inner annulus to the bolt end and returns along the outer annulus.
  • Terminate grouting with visible grout return.
  • Detach adaptor and proceed to next bolt.

Standard Lengths & Packaging

  • Standard bolt lengths range from 1200 to 6000mm in increments of 300mm
  • Non-standard lengths are available upon request.
  • Bolts are packaged in bundles with threads protected be heavy duty polyethylene bags.
  • All bolts are supplied fitted with accessories with the exclusion of washer plates which are supplied loose.

Notes

  • DSI Mining Products Division is quality assured to ISO 9001:2000, Registration No.QAC/R61/0315