Concrete is recognized for its strength in compression but it is greatly disadvantaged when submitted to tensile loads. It is for this very reason that steel or other types of reinforcements are used in conjunction with this material. In pre-stressing, compressive stresses are introduced in the products in order to balance the effects of the external loads that will be applied on the concrete elements. The ultimate goal of pre-stressing is to limit/eliminate the occurrence of cracks in the structures subjected to service loads as well as reducing the overall size of these elements, eventually making them lighter too.
Although steel has been used in pre-stress applications for over 60 years, we are presently witnessing the emergence of revolutionary precast pre-stressed concrete products manufacturing techniques with the increasing interest for composite material concrete reinforcing bars. This changing environment has greatly influenced the development of a technology that would make pre-stressing with corrosion resistant tendons a reality.
With the product V•ROD of Pultrall...
The CARBON V•ROD product from Pultrall is the answer to this new requirement. With a guaranteed tensile strength equivalent to that of the steel ones, the #4 (13M) Carbon V•ROD tendons, used in conjunction with the FIBERLOC anchoring system, make the fabrication of precast pre-stressed ''steel-free'' and ''long-lasting'' concrete elements possible.
The Solution for Corrosion!
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V•ROD rebar does not rust, even in the harshest environments. It does not react to salt, chemical products or the alkalinity present in concrete.
V•ROD rebar does not create a thermal bridge within structures.
She is almost 4 times lighter than steel rebar. It is much easier to handle and, in most cases, one truck load will be sufficient to carry the rebar required on an entire project.
V•ROD rebar offers a level of thermal expansion comparable to concrete due to its 80% silica content.
V•ROD rebar does not contain any metal; it will not cause any interference in contact with strong magnetic fields or when operating sensitive electronic instruments.
V•ROD rebar produced by pultrusion offers a tensile strength that can reach more than five times that of steel.
V•ROD rebar can be delivered at the right time and in the exact quantity needed at the site. Various specifications such as the length of straight bars as well as angles and led lengths of special bent sections are prepared in the plant.