Due to their outstanding strength and versatility B+BTEC VDP Capsule Anchors are increasingly replacing mechanical anchors
TENN/B+BTEC VDP Glass Capsule Anchors
Due to their outstanding strength and versatility B+BTEC VDP Capsule Anchors are increasingly replacing mechanical expansion anchors in both new construction and existing structure renovation.
Mechanical expansion anchors by design exert a radial force against the base material, creating expansion stresses that tend to split the concrete. VDP Capsule Anchors are non-expanding, so they do not set up expansion stresses in the base material. This makes them ideal for close bolt spacing or installing near concrete edges.
VDP Capsule Anchors are capable of withstanding extremely high loads. They don’t vibrate loose nor back out of the hole under torque.
On the other hand, expansion anchors slip under torque or axial loading; are unsuitable for vibratory loading; and ultimately are more expensive to use.
B+BTEC VDP is a thin-walled glass capsule filled with liquid resin and quartz stone aggregate. Inside the capsule is a smaller glass capsule containing the resin hardener.
A VDP anchorage is made by placing one or more VDP capsules in a hole drilled in concrete and then spinning the threaded rod bolt into the capsule. The rotary motion shatters the capsule and mixes the contents. Chemical interaction between the resin, aggregate, glass fragments, and resin hardener, produces a high strength adhesive that cures quickly to solidly bond the bolt to the surrounding concrete mass. The anchorage produced is suitable for all types of loading – static, vibratory and shock.