One-time formwork for TBT columns

What is a one-time formwork TBT

Many construction works and design concepts are not complete without the arrangement of columns of different cross-section and shape inside the buildings. It is expensive and not always expedient to use an industrial monolithic removable formwork for such purposes. Manufacturers of building materials and builders have found a budget option to overcome these difficulties: one-time formwork for columns. Formwork "TBT" is used in the construction of all types of buildings to create square and round columns with cross-section from 150 mm to 1200 mm, non-standard section, as well as for pile-and-foundation foundation, piles, point foundations for any types of buildings, as well as in bridge construction.

The lifetime of such a product of design thought is laid in the name itself: the formwork limiter of the desired profile is installed in the place specified by the project documentation. Further, for concrete pouring in columns up to 4 meters, concrete mixes made at the site of work can be used. For more capital structures, and the height of the supports, established by the technology of disposable formwork "TBT", can reach 30 m, special equipment is used. The process of installing shuttering pipes looks rather prosaic.

1. The reinforcing cage of the future column is welded and fixed;Dimensions, design characteristics, location and method of attachment to the building's bearing elements are determined by the design assignment.
2. "TBT" is installed one-time formwork of columns;There can be several options here, each of them solves not only technical, but also interior tasks. We offer to consider them using the example of the products of the company Investsvobstroy:
   • formwork of square and rectangular cross-section from 150x150( light) to 800x800 mm;reliable bearing supports for residential and industrial buildings;the design is so-so, but the reliability is high;
   • possibility of inclusion of decorative inserts in the process of installation of one-time formwork of columns;the result is quite impressive, the textured concrete surface looks unusual, while the cost of the element itself remains in a reasonable price range;
   • manufacture of formwork for columns of various shapes;for aesthetes - the source of design solutions, for builders - a convenient technology to reduce the cost of their work while maintaining quality.

Disposable formworks of the TBT system are manufactured by the method of layer-by-layer winding on a shaft of a predetermined form of cardboard, waterproofing( polymer films) and strength( usually aluminum foil) thin layers with intermediate sizing.

Disposable formwork of columns TBT: advantages of

People who have at least once been engaged in concrete work, perfectly realize what problems are associated with this action. Mount and fix the boards of plywood, boards, OSB and, at the same time, achieve a quality surface of the finished construction structure is very difficult. Practicality and convenience in working with the TBT formwork for designers and builders can be formulated in several points:

• ease of transportation: even a particularly strong multi-layer cardboard, from which one-time column formwork is manufactured, weighs much less plywood or other wooden fences, can be transported on an opentransport;on transportation we have economy;
• installation speed of disposable formwork for columns;the specific weight of the running meter depending on the diameter, thickness and density of the material varies within the limits of 1.8-40 kg / m;is installed without the use of special equipment in virtually any room;
  
• column height can be set in the range of 0.5 - 30 m;linear dimensions of columns of any cross-section are graded in a wide range;
• the limiting diameter of round smoothed columns reaches 1250 mm;agree, the support is more than worthy;the wall thickness of the formwork itself is 3-15 mm( depending on the cross-sectional area and the height of the structure);
• provides an ideal quality of concrete coating, requiring minimal finishing work;the internal surface of the disposable formwork "TBT" with the correct design solution is not deformed by purely reproducing any form of columns;
• additional quality indicators: high moisture resistance( high-quality sizing protects the product from both internal and external influences);The best heat-insulating properties in comparison with metallic analogues;in our climatic conditions, the factor is not unimportant;
• the possibility of pouring columns of almost arbitrary profile, as manufacturers are ready to perform a one-time formwork "TBT" non-standard( truncated, relief, decorative) format.

Assembling and dismantling of formwork

We have already determined our position on this issue, therefore we simply give the dry technological data:

1. is "stretched" on the reinforcing cage;is mounted on the support ring in the base;in the upper part is attached to the head( a coupling with anchors or other fixing elements is possible);
2. steel cuff, easily moved around the body of the formwork, fixed with stoppers;slants are installed and the verticality of the entire structure is checked;
3. the concreting speed for specific sections from 100 to 1250 mm will vary within 6 - 2.5 m / h;
4. dismantling of the formwork is done by simply pulling out the cord( tearing the cardboard in half) with subsequent disposal of garbage;it turns out quickly and ecologically correctly.