Special demands require special solutions – and a lot of experience. KOSTER is specialized in individual solutions. A few of them are presented here. For special needs always contact our technical support team (info@kosterusa.com)
The method for waterproofing tunnels with KOSTER products is based on a combination of negative side waterproofing and a liquid applied crack bridging waterproofing compound. The waterproofing layers cannot be infiltrated and the water will not move laterally between the layers as with membranes. The system does not need drainage. No water is being drained off the surrounding soil so the water table is not affected.
This system is suitable for tunnels built with closed construction techniques. Flowing water is stopped by injecting KOSTER KB-Pur IN 1 and afterwards permanently sealed with the elastic resin KOSTER KB-Pur IN 2. Small leakages or whole walls which are being penetrated by water can be sealed with KOSTER KD 2 Blitz Powder. To waterproof the entire surface from the negative side KOSTER NB 1 Grey is applied to the dry and solid substrate. After KOSTER NB 1 Grey has hardened the crack bridging coating KOSTER CFR 1 is applied to the waterproofed and dry substrate. Finally the system is covered with another layer of concrete. The waterproofing is sandwiched between two concrete layers.
Always adhere to the specifications in the respective Technical Guidelines.
Heavy duty corrosion protection with Silicate Mortar
For the protection of concrete surfaces against acids the first step is to coat the surface with the negative side waterproofing KOSTER NB 1 Grey or the faster version KOSTER NB 1 “fast”. The acid protection itself is made with KOSTER Silicate Mortar (also suitable for damp substrates) or KOSTER PSM (suitable for dry substrates and easy to apply).
Where acid resistant tiles are to be applied KOSTER Silicate adhesive can be used as a tile adhesive and KOSTER Silicate Mortar is used for jointing the tiles.
Always adhere to the specifications in the respective Technical Guidelines.
One example of the need for heavy duty corrosion protection against acidic fumes and condensate is the coating of industrial chimneys made of concrete or masonry.
For the restoration of concrete or masonry, the substrate is to be mechanically cleaned until a solid, unburdened substrate is achieved. The surface is primed with KOSTER Polysil TG 500, which hardens the substrate and immobilizes salts.
Reprofiing is done with KOSTER Repair Mortar NC. The surface is roughened in order to achieve a strong mechanical bond to the surface with KOSTER PSM.
KOSTER PSM is applied as the protective layer against acids.
Always adhere to the specifications in the respective Technical Guidelines.
The corrosion protection of steel is usually done with a two layer coating of KOSTER Corrosion Protection, applied by brush or roller. The substrate preparation is carried out according to DIN EN ISO 12 944-4 (Sa 2 ½, RY5 > 50 μm).
If a crack bridging, flexible coating is required KOSTER Corrosion Protection is to be coated with two layers of KOSTER PUR-Bitumen.
In the case of extraordinary high acid impact (e. g. when underrunning the acid dew point) the entire coating is to be carried out with two layers of KOSTER VE. In addition to that KOSTER VE is suitable for covering edges, holes and screws prior to the application of KOSTER Corrosion Protection.
Always adhere to the specifications in the respective Technical Guidelines.
Because corrosion protection on steel requires experience and should be analyzed case by case, please contact our technical consultants. They will be glad to answer your questions.
