Bentonite cord is becoming an increasingly common material used in construction, due to its property to expand in the body of concrete, absorbing water. It consists of bentonite clay, which, when in contact with water, has the property of swelling and increasing in volume. Also, the easy and quick installation made it very popular on construction sites. Bentonite cord Hydrostop SANPO L is used for waterproofing and sealing of technological seams. Due to the unique properties of bentonite clay included in the cord, the insulating material works all year round and at all temperatures.
Bentonite cord is a special waterproofing profile involved in the waterproofing system of concrete structures. It is used both in the reconstruction and repair of old structures, and in new construction.
What is bentonite cord used for?
Recently, builders have been turning more often to the use of bentonite cord. This material allows you to simplify the construction process. The ability of the cord to expand and swell has made it very popular for a short time, because with proper use this material easily helps to solve problems with waterproofing. Bentonite cord fills all cracks, seams and voids, forming an impermeable connection from water and moisture, which allows sealing the seams of the concrete structure for a long time.
- concreting interruption seams: cold, working seam
- inputs of engineering communications
- holes in concrete after removing the formwork
What is the principle of operation of bentonite cord?
Bentonite cord securely and firmly adheres to the concrete surface, filling seams, junctions and the slightest voids in the concrete body, forming a reliable protective layer. The principle of operation is that as a result of hydration, the bentonite cord increases in volume, forming a gel-like mass that fills all cracks and voids and reliably seals the seams of the concrete structure. The cord expands 4 times in the concrete body.
What types of bentonite exist?
Our production standard produces bentonite cord Hydrostop SANPOL of different sizes.
When ordering a large volume, cords of any cut and length can be made.
The standard length of one bentonite cord is 5 meters.
How to choose the right bentonite cord?
To seal the technological seams, the size of the bentonite cord is selected depending on the thickness of the concrete wall or slab and the technological characteristics of the structure.
- for sealing holes – bentonite cord round cut with a diameter of 22 mm.
- for the inputs of communications – a rectangular section of 5x20 mm.
- for sealing cold joints – rectangular section 10x20; 15x25; 20x30 mm.
How to mount a bentonite cord?
Installation of bentonite cord depends on its type and is carried out using a special mesh, dowels, sealant or glue. Usually it is nailed with steel nails or pressed with a prosechno-exhaust mesh or a profile for fixing a bentonite cord.
- The bentonite cord of the round cut d22 is inserted into the hole after the coupling screw and covered with a repair mixture.
- Bentonite cord 5x20 mm rectangular cut for the inputs of communications – wrapped around the pipe, fixed with a sealant or wire and filled with a repair mixture.
- Bentonite cord 10x20; 15x25; 20x30 mm for sealing joints is laid along the seam, fixed with a special mesh, dowels, glue or sealant and filled with the next part of concrete.
What are the advantages of the application?
- low cost
- easy installation (does not require highly qualified installers and special tools)
- wide operating temperature range without loss of properties -30°C to 50 °C.
- installation on a wet base is possible
- plasticity
- withstands hydrostatic effects up to 7 atmospheres.