In the case of buildings that can be rebuilt after the earthquake, the remediation coverage, in the form of construction interventions, depends on the degree of damage to the building and the need to achieve a certain level of earthquake resistance. Rehabilitation is necessary to repair all damage, and if possible to strengthen the buildings to a certain level of earthquake resistance.
Older masonry buildings are more susceptible to earthquake damage than newer buildings made of reinforced concrete or built with static reinforcement with reinforced concrete.
Problems of a constructive nature in masonry buildings are characterized by poor foundations, lack of wall connections, worn loose bonding mortar and failed joints between stone or brick wall elements.
Rehabilitation of concrete structures is carried out in the event of damage that threatens the load-bearing capacity of structural elements, where the damage itself is not of such a scope that requires the demolition of the structure.
Carbon fibers, fibers containing at least 90% carbon, are very fine, mostly circular in cross section, 5 to 10 μm in diameter and inherently black in color.
Carbon fibers are characterized by the following properties:
- high strength (3000 to 5000 N / mm²) and high modulus of elasticity (for graphite fibers 200,000 to 450,000 N / mm²),
- high stiffness, relatively low density in relation to metal threads (1.5 to 2.2 g / cm³), excellent heat resistance with simultaneous dimensional stability (thermal decomposition in the range 3600 to 4000 ° C),
- very poor flammability, chemical inertness, non-corrosiveness, resistance to acids, alkalis and organic solvents, good thermal and electrical conductivity, non-magnetic, very low X-ray absorption, moisture absorption and excellent biocompatibility.
DRACO systems offer a range of solutions
- DRACO® FIX 520 are high quality carbon lamellas which together with DRACO® FIX 595 epoxy adhesive form a complete system for strengthening structures.
- DRACO® FIX 510 is a high-quality, high-quality, two-way carbon fiber mesh that, together with the DRACO® FIX 593 epoxy resin, forms a complete structural reinforcement system.
- DRACO® FIX 500 is a prefabricated polymer-reinforced carbon strip for structural reinforcement of concrete, brick (masonry), steel and wood structures.
- Carbon strips are glued with DRACO® FIX 820 epoxy adhesive to the substrate as external support elements. Carbon strips can also be installed by gluing epoxy adhesive DRACO® FIX 815 or DRACO® FIX 820 into the notched joints in the concrete base.
Carbon fibers are used for purposes where high strength and their resistance to high temperatures, chemical inertness and electrical conductivity are essential. Did you know that carbon fiber is twice as strong and five times lighter than steel?