What’s the difference between a chemical anchor bolt and chemical rebar planting?

  • In actual processing,chemical rebar planting and chemical anchor bolts seem to have the same function, but in fact there are quite differences.
  • So what’s the difference between a chemical anchor bolt and chemical rebar planting?
  • chemical anchor bolt
  • The chemical anchor bolt is a kind of special chemical adhesive, which fastens the bolt and inner threaded pipe in the drilling hole of the concrete base material, and binds and seams between the binder and the screw and between the binder and the concrete hole wall, through the action of the binder and the screw, and the bond between the binder and the concrete hole wall. A component that implements anchoring of a connecting member.
  • Chemical anchors are generally thicker and shorter, the anchor depth is shallow, the main component is Vinyl Ester Resins. It is not suitable for post-anchoring connections of structural members with tensile, edge shear, tension and shear composite forces and non-structural members of lifeline engineering because of their poor adaptability to cracks and low bearing capacity. In addition to the bond type anchor bolt specially used in cracked concrete, the general bond type anchor bolt should not be used for the post-anchoring connection of the structural members with crack concrete base material under tension, edge shear and tension and shear composite forces.
  • Chemical rebar planting known as rebar planting, is a kind of post-anchoring technology widely used in the field of building reinforcement. It uses chemical anchor adhesives (mainly pure epoxy adhesive) – to fix rebars and screw joints in the drilling holes of concrete substrates, and by means of bonding and locking effect, A component that implements anchoring of a connecting member.
  • The anchoring principle of planting bars is the same as that of chemical anchor bolt, but by the unlimited length of rebar and thread rods, similar to cast-in-place concrete reinforcement, the failure mode is easy to control, and generally it can be controlled as the failure of steel bar . Therefore, it is suitable for anchoring of structural and non-structural members with static and seismic fortification intensity ≤ 8 degrees.
  • The main differences between Chemical anchor and chemical rebar planting
  • The stress principle is different:
  • The planting bar must be a full-screw or ribbed bar, and the force of the adhesive is used to achieve the force;
  • Use the mechanical locking force to achieve the force effect;
  • Different anchoring depth:
  • The Anchorage depth of the planting bars is generally greater than 15 d after the calculation of the formula.
  • The anchoring depth of chemical anchor bolt is less than 10 d.
  • Different forms of destruction:
  • Usually, there is only one type of damage to the bar planting reinforcement  – the steel bar is destroyed
  • The forms of destruction of chemical anchor bolts are as follows——Anchorage steel damage and concrete cone damage.
  • At present, the Plant steel reinforcement technique is the mainstream reinforcement technology, because of its mature technology, it is widely used in many new projects and reinforcement projects.