Bonding systems for fixing works

Chemical bonding system in construction works is an alternative for mechanical methods of fixing. As compared to mechanical methods the system based on a new generation of chemical formulas has a wide range of advantages:

• It is versatile, which means that it can be applied on different types of surfaces,
• It is characterised by resistance to heavy loads - after hardening the chemical binder is significantly stronger than the substrate to which it was applied,
• The system does not cause tension in the substrate, which makes it possible to makem fixing work close to edges of concrete slabs, which cannot be done using mechanical anchors.

One of important features of the system is its versatility. Using this system makes it possible to mount structural and responsible constructional elements (pillars, supports, balustrades etc.), embed machines and equipment. It can also be applied in carpentry, joinery, boatbuilding, as well in minor home repairs. This system is also advantageous in mounting smaller elements like washing-basins, stool, boiler etc. fast, easy and economical mounting is the advantage of this system. This bonding system is versatile also because it may be applied various substrates.

Depending on requirements this system can be applied by various techniques: by injection, puring, filling, gluing etc. The so called injection technology, being a part of this system, consists of bonding mortars, accessories, and instruction manuals. At first this method seems to be more complicated than driving nails, hence the instructions manual. However, anyone who shall apply this technology once shall not need the instruction manual anymore.

Generally speaking, the injection technology consists of drilling an opening in the surface, applying the bonding mortar, inserting a metal linking element (e.g. threaded rod), on which the mounted element is hung or screwed.

While mounting in materials containing cavities, first a nylon or metal sleeve is inserted in the opening and then the bonding agent is injected in the sleeve. Application of the sleeve prevents excessive consumption of the bonding agent and facilitates embedding of a metal element. Two-component resins are used as bonding mortar. Their resistance and chemical properties depend on the chemical formula applied in resin production. Often styrene is used as a catalyst which is relatively cheap, however it is somehow toxic before hardening, which is the reason why its application in closed rooms causes some discomfort and requires application of protective masks. For ecological reasons and to enhance comfort of application, styrene is replaced by other components.

The offered BIT injection technology is based on non-flammable non-styrene bonding agents, constructed on the basis of methacrylate manomers, application of which is possible in closed rooms without the requirement to wear protective masks. The bonding agent based on well-developed chemical formulas is chemically resistant, can be used in applications where usage of A2 or A4 steel is required and is characterised by high mechanical parameters, facilitating conveying heavy loads (e.g. the tested BIT PESF and BIT EASF fastenings resisted an axial force destroying average load of over 50kN with a standard depth of anchoring, with a M12 steel rod (5.8 steel) and ca. 80 kN with M16 rod, where analogical results for steel anchors of good quality are respectively ca. 40 kN for M12 and ca. 55kN for M16.