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Composite reinforcement

Today the composite reinforcement is more frequently used for reinforcing of the concrete structures alongside with conventional reinforcement. Main types of composite reinforcement:

  • Fibreglass
  • Basalt

The material, of which the reinforcement is made of, is stored in the reinforcement name. Each of its types possesses unique properties. The composite reinforcement is usually supplied with diameters from 4 to 12 mm and any completed length, and the diameters above 12 mm are cut into rods.

Composite REINFORCEMENT PROPERTIES and ADVANTAGES

  • restores its initial position after loads and, having tensile strength threshold value 3 times higher than the metal, it is extremely strong for tension and bending;
  • has less diameter and 4-5 less weight as compared with the metal one;
  • is not exposed to corrosion absolutely, thus reducing and not requiring expensive repair works;
  • takes leading positions in Germany, Italy, Canada, USA and Japan, where the corresponding standards determining regulations for its design, testing and operation are developed;
  • differs by its low thermal conductivity, thus facilitating in solution of the building energy efficient consumption problem;
  • possesses anti-magnetic and dielectric properties;
  • ecologically safe and fireproof, it is a dielectric;
  • withstands the temperature gradients from −70 to +100 degrees;
  • forms reliable adherence with concrete;
  • it is radar-transparent and inert to the influence of the electromagnetic fields allowing its usage to avoid the electromagnetic swirls, to which the most dedicated medical and other equipment is sensitive;
  • resistant to action of ultra-violet rays, aggressive chemical substances, withstanding mineralized, sea and ammonia water and various acids with no reaction to alkalis, chloride salts, carbon dioxide, sulphur gases and nitrogen oxides.

BASALT REINFORCEMENT APPLICATION

The most reasonable application areas for basal reinforcement are off-shore facility structures, automobile roads, foundations and structures of utility networks, construction of high rise buildings, performance of restoration for building and structures, creation of utility and external communication lines.

It is indispensable in the industrial construction during building of ports, channels, dry docks, reinforcement of concrete tanks, treatment storage facilities, support of shore-based structures, at the chemical production facilities as contact-line supporting structure, during reinforcement of sewage pit covers.

APPLICATION OF GLASS-FIBRE PLASTIC REINFORCEMENT

The strong and light glass-fibre plastic reinforcement is widely used during implementation of residential and civil construction projects for reinforcing different types of construction and decorative structures and elements (articles) made of concrete and plaster, foundations, building and structure stone or brick wall and concrete floors, as well as external and internal wall panels, including multilayer ones (so-called sandwich panels), beams and ceiling-and-floor slab panels.

This type of reinforcement is actively used in bridge engineering, in cast-in-place and industrial flooring, in walls and wall panels to improve such characteristics as compressive strength, tension and bending.

As regards the road construction, the comparatively inexpensive glass-fibre plastic reinforcement suits perfectly for arrangement of reliable railway and road barriers, as well as on-line reinforcement of the road slabs, bridges and highways.

Composite REINFORCEMENT DISADVANTAGES

Apart from indisputable merits the composite reinforcement has its own disadvantages. It is complicated to name them as critical, but it is worth to be aware of the following: the material negative characteristics can influence the construction process. Low modulus of transverse elasticity and insufficient thermal resistance indicator attribute to disadvantages. Due to low elasticity the reinforcement can be bent easily. Therefore, in case of production of ceiling-and-floor slabs the additional calculations shall be carried out this reinforcement feature taking into account. Insufficient temperature resistance is a far more serious disadvantage. The fact that the glass-fibre is heatproof in itself does not mean anything. The plastic link does not withstand high temperature. Therefore, use of glass-fibre together with concrete is not allowed. Such reinforcement is used in those construction areas, where there are no temperature gradients. However these requirements are almost always met at the common residential and some industrial sites.