Selecting the foundation under the house and the reinforcement cage depends on the characteristics of soil and material for the construction of the house. Traditionally held Class AI reinforcement armature - AIII.
Not long ago, the market was taken a composite reinforcement.
It becomes popular use of fiberglass reinforcement and steel fiber as a core element, and auxiliary.
This is a traditional material for the framefoundation structures. It is used in strip foundation, piled, columnar and precast concrete. Reinforcement AI class is used to create the reinforcement cage in the foundations of a "light" at home: frame, wood, at least for the houses of foam and aerated concrete, and other lightweight structures. This is due to the fact that the armature has a circular cross section AI in diameter and smooth surface. Because of its reduced adhesion to the concrete. The diameter of the reinforcement used between 6 mm and higher. Calculated on the home design stage.
AIII class fittings made ofalloy and stainless steel with high performance in strength. The section is ribbed. Figure surface can be of several types: circular, crescent or mixed. Valves with a circular profile is designed for massive structures due to the high adhesion to concrete. Valves with a sickle-shaped pattern can be used in the construction of experiencing stress fracture. When tensile load is applied a larger diameter valve.
The diameter of the valve is considered at the design stage. For homes "light" to be relatively small armature weight of 8-10 mm diameter, 6 mm or assembly. In homes with heavy weight walls for reinforcement of foundations applied reinforcement diameter 12-14 mm.
The valve of the non-carbonaceous steels can be weldedin the preparation of the framework of the foundation. Welding fittings made of carbon steel is not recommended. welding place is fragile. It is better to perform the binding reinforcement binding wire.
Fittings manufactured in coils, in the form of bars. Bay supplied fittings 6-10 mm in diameter. Valves with a larger diameter comes in bars. Standard length rods:. 6 m, 9 m, the maximum diameter of 11.7 m manufactured armature 32 mm.
Its main advantage is to a considerablecorrosion resistance and inertness to any aggressive media. These characteristics allow to reduce the diameter of the rebar for reinforcing foundations without sacrificing structural strength as a whole. The use of composite reinforcement will provide an opportunity to reduce the protective layer of concrete. The estimated and expected life of 75 years is assumed. According to the materials of the composite fittings is divided into: the glass, basalt, kevlar.
Advantages of composite reinforcement: higher strength by 1.5 times in comparison with steel, and does not corrode steel in lighter 3.0-3.5 times. It has dielectric properties, and radio waves. Frost resistance. The coefficient of thermal expansion (CTE) CTE of the composite fittings is concrete. Weighing the merits of one technical drawback - low heat resistance.
Composite rebar is more expensive than usual. But there was an article on saving diameter valves used. To reduce costs, you can use rubble concrete foundation when the concrete is poured at a coarse aggregate is added: battle brick and rubble stone (Savage), crushed stone and gravel.
The material is gaining popularity by pouringfoundations - is concrete reinforced with fiberglass. The type of fiber properties of concrete depend. Fibre concretes are used to fill the tape foundations for complex reinforcement to improve the quality of the foundation.
For concrete reinforcement is added fiber of differentspecies. Fiber - is the waste production of nails and trimming steel wire for steel fibers. Basalt fiber is made from basalt fibers. Similarly, in the concrete may be added glass fibers and polymers, in particular polypropylene. Add textiles.
Adding fiber increases the impact on thefi 500% and friability by 50%. Thus propylene is sufficiently fiber 900 grams per 1 cc. m of concrete, or 20-50 kg of steel fiber per 1 cu. m.
These additives are intended to perform the valve functionconcrete, improve crack resistance, resistance to deformation. Improved qualities such as frost resistance and water resistance. Adding fiber in concrete facilitates weight structures made of it. The Fibre concretes with added fiber of a different nature composite binders and modifiers. All together gives the concrete completely new properties that can significantly reduce construction time and save material consumption.