13 May, 2019 | Anchors, Solutions

One of the most common actions in the construction of civil engineering structures is the anchoring of steel bars as structural reinforcement in order to ensure the continuity of reinforced concrete structures. A previous structural evaluation by a qualified technician is essential to guarantee the safety of the performance and the structural durability. It is essential to choose reliable anchoring systems with proven and certified mechanical performance. The CE marking EN 1504-6 is the reference certification system in Europe for reinforcement anchors in concrete structures, and can be approved in many other regions of the world. Our product BEPOX® 626 ANCLAJES comes to the market with the aim of becoming the reference in the civil engineering sector for this type of actions, ensuring the highest performance, quality and safety.

BEPOX® 626 ANCHORINGS is a solvent-free, thixotropic, two-component epoxy formulation for use in concrete anchors. The formulation has been carefully studied for the optimization of parameters such as resistance to aqueous degradation, adhesion under water and resistance to mechanical, chemical and thermal aging. Its mechanical properties are among the best for a room temperature curing system, whose application range is between 5 and 40 °C. BEPOX® 626 ANCLAJES is a derivative of Bepox® 626 Transparent, a long-established product in the world injection market. Its excellent wet/dry characteristics and its adhesive and underwater curing capabilities give it a unique value in the industry.

Among the tests that must be passed to certify a resin for anchoring under the EN 1504-6 standard is the classic “pull-out” test with a static load of 7500 kg. Subjected to this high load, the rebar anchor made with our BEPOX® 626 ANCLAJESresin did not shift a single millimeter. In fact, the anchor broke under a load of 10,000 kg and due to breakage of the steel bar, while our adhesive remained intact.

Another tough test to obtain this certification is based on subjecting the anchor to a constant load of 5000 kg for 90 days, ensuring a maximum displacement of 0.6 millimeters. BEPOX® 626 ANCLAJES shifted after this 3-month test by a negligible 0.2 millimeters.

In the particular case of anchorages to be installed in seismically active regions, the authorities require even more stringent special tests to be passed. The purpose of these tests is to characterize the behavior of the maximum adhesive loads reached by a concrete-resin-bar joint in the case of cracked concrete and after cyclic loads that simulate the behavior in the event of an earthquake, both in tension and in shear. For this case we have certified the product BEPOX® 626 TIX, with higher thixotropy than the first one but similar properties. These tests have been externally certified in the construction laboratory of CITEEC (a center associated with the Faculty of Civil Engineering of the University of A Coruña).