Epoxy resin injection
30 years of success with Gairesa
BEPOX® 626 is a product that has been operating in the global resin injection market for more than 30 years, which indicates the quality and efficiency it offers. Its excellent wet/dry characteristics give it a unique value in the industry. BEPOX® 626 was initially introduced into the market for the repair of large concrete structures, primarily for the injection of epoxy resin into cracks in hydroelectric dams. Nowadays, and as a consequence of its excellent balance of properties and curing capacity in such adverse conditions as under water, it is a standard that can be used in the injection of all types of concrete structures, in the manufacture of mortars, composites, fillers, etc. It should be noted that it complies with the CE marking EN 1504-5 as a product for concrete injection, audited by independent bodies.
Performance analysis of BEPOX 626 epoxy system
The mechanical properties of BEPOX® 626 evolve rapidly, giving high tensile strengths (40-50% of final values) for a multitude of applications after 24 hours of curing at room temperature. Tensile and deformation test values at different curing times are shown below:
ELASTIC MODULUS (TENSILE TEST)
The compressive strength of BEPOX® 626 achieves high values after only 1 day of curing at room temperature, reaching near maximum strengths (80-90%) after 48 hours:
ELASTIC MODULUS (COMPRESSIVE TEST)
Properties after ageing
Accelerated water ageing tests simulate the behaviour that the cured system might have over time. To test the ageing resistance, the cured resin is immersed in water until it reaches equilibrium water absorption, and then its mechanical properties are analysed in a tensile-strain test. After 1 year of immersion, the elastic modulus of BEPOX® 626 remains unchanged. The experience of more than 30 years of successful injection of BEPOX® 626 validates the findings of this accelerated test.
Dams repaired with
SANTEETLAH (NORTH CAROLINA)
SAN ESTEBAN DEL SIL (OURENSE – SPAIN)
ARLANZÓN (BURGOS – SPAIN)
ATAZAR (MADRID – SPAIN)
RUMEDO (PIRINEOS – SPAIN)