In Tsakonas Building Supplies you will find the largest range of quality and branded, materials for retrofitting and structural strengthening of reinforced concrete structures. Solutions and materials adapted to the problem - pathology of each construction. The largest construction companies in Northern Greece trust us as suppliers in such a critical issue as retrofitting and structural strengthening.
In reinforced concrete, steel is usually protected from corrosion by the passive protection offered by the alkalinity of the cement paste. However, due to the penetration of aggressive substances, steel can eroded. Three conditions must be met for steel to begin to corrode: ● The passivity of steel must have been damaged by chlorides or carbonation or by a combination of the two. ● Presence of moisture as electrolyte, usually permanent humidity over 3.5% by weight of concrete ● Presence of oxygen ● Presence a source of ammonia or sulfate in the concrete (eg septic tank leakage in the basement level).
A corrosion inhibitor is a chemical substance that, when added in small concentration to an environment, effectively decreases the corrosion rate or/and delay the onset of corrosion.
Sika® FerroGard®-903 Plus
A heavy duty migrating corrosion inhibitor. Sika® FerroGard®-903 Plus is a surface applied mixed corrosion inhibitor, designed for use as an impregnation of steel reinforced concrete. Sika® FerroGard®-903 Plus is based on organic compounds. Sika® FerroGard®-903 Plus penetrates the concrete and forms a protective monomolecular layer on the surface of the reinforcing steel. Sika® FerroGard®-903 Plus both delays the start of corrosion and reduces the corrosion rate. For corrosion rate value Icorr < 1.5 μA/cm^2.
A heavy duty migrating corrosion inhibitor. Margel VPI 580 is a patented vapour phase corrosion inhibitor which is inserted inside concrete structural elements close to the reinforcing steel. The product has been specifically developed to ensure the corrosion inhibitors are released over a period of 12- 48 months. This results in a well bonded layer of corrosion inhibitor around the reinforcing steel resulting in a passivated protective layer that reduces exposure to chlorides, water and oxygen. For corrosion rate value Icorr < 1.5 μA/cm^2.
MCI®-2020 Gel is an organic corrosion inhibitor. It is considered ambiodic (mixed), meaning it protects both anodic and cathodic areas within a corrosion cell. MCI®-2020 Gel contains a synergistic blend of amine salts of carboxylic acids which form a protective layer on embedded reinforcement, delaying the onset of corrosion and reducing existing corrosion rates. By utilizing an injection application, MCI®-2020 Gel delivers active chemistry directly to the depth of steel reinforcement. At this depth, the inhibitor can move laterally through the concrete via aqueous, vapor, and interfacial diffusion along the embedded reinforcement.
SikaTop® Armatec®-110 EpoCem®
SikaTop Armatec 110 EpoCem is a bonding primer and reinforcement corrosion protection. It is a cementitious, epoxy resin compensated three component coating material with corrosion inhibitor, used as bonding primer and reinforcement corrosion protection.
Sika MonoTop®-910 S
Sika MonoTop®-910 S is a cementitious, polymer modified one-component coating material containing silica fume used as bonding primer and reinfocement corrosion protection.
Betonfix KIMIFER is a single-component re-alkalizing, anti-corrosive hydraulic mortar for reinforcing bars, composed of a synergic system of corrosion inhibitors, CE marked according to the requirements of UNI EN 1504-7 for protection against corrosion of reinforcements.It is strongly adhesive to concrete and iron surfaces, has high alkaline properties and excellent resistance to water and harmful gases in the atmosphere. Its rapid setting reduces times of laying when restoring reinforced concrete structures with visible reinforcements.
● Embedded galvanic anodes
Embedded galvanic anodes
Embedded galvanic anoded for corrosion protection of reinforcing steel in concrete structures. Galvanic anodes consist of a zinc core surrounded by a specially formulated cementitious mortar. The zinc core corrodes preferentially to the surrounding rebar, providing galvanic corrosion protection to the reinforcing steel.
Sika® FerroGard® Patch CC
Sika® FerroGard® Patch CC is a zinc based discrete sacrificial anode placed in reinforced concrete structures which are corroding as a result of chloride ingress and / or carbonation. Sika® FerroGard® Patch CC discrete anodes are placed into sound carbonated or chloride contaminated concrete outside of any concrete repaired areas (occasionally can be placed also in the repaired area as well). Once installed, the Sika® FerroGard® Patch CC anodes will corrode preferentially to the surrounding reinforcement, offering protection against corrosion damage.
Sika® FerroGard® Duo
Sika® FerroGard® Duo is a hybrid anode based on a dual technology which combines Impressed Current Cathodic Protection and Galvanic Cathodic Protection systems. Sika® FerroGard® Duo discrete anodes are placed into sound but chloride contaminated concrete outside of any concrete repaired areas. The anodes work in 2 phases: 1st phase - an impressed current is driven from the Sika® FerroGard® Duo anodes to the steel using a temporary power supply. During this stage, the reinforcement’s passive film is strengthened and aggressive ions are drawn away. 2nd phase - at the end of the 1st phase the power is removed. The anodes then act as a long-term sacrificial anode preventing further corrosion.
● Concrete Repair Mortars
Concrete Repair Mortars
Deterioration of concrete structures can happen for many reasons such as corrosion, structural damage, water infiltration etc. Many years of research plus decades of practical experience have enabled Sika to develop full comprehensive mortar solutions to repair, restore and rehabilitate concrete structures.
SikaRep®-200 Multi is a ready to use, one component, thixotropic repair mortar, for medium thickness (between 5mm to 60mm), regular concrete structural repairs, meeting the requirements of Class R3 of EN 1504-3.
SikaRep®-300 Classic is a ready to use, one component, thixotropic repair mortar, for medium thickness (between 5mm to 20mm), regular concrete structural repairs, meeting the requirements of Class R3 of EN 1504-3.
SikaRep®-400 Extra is a ready to use, one component, thixotropic repair mortar, for medium thickness (between 5mm to 35mm), regular concrete structural repairs, meeting the requirements of Class R3 of EN 1504-3.
Sika MonoTop® Dynamic HP
Sika MonoTop® Dynamic HP is a ready mixed polymer modified repair mortar, with high thixotropy and balanced shrinkage properties, used for re-building up layers from 0,5 to 4,5 cm in thickness. It contains modified cements with synthetic polymers, silica fume, selected aggregates and synthetic fibres.
Sika MonoTop®-627 HP
Sika MonoTop®-627 HP is ready to use, quick setting, low shrinkage, cementitious based mortar, reinforced with special synthetic microfibers for demanding concrete repairs of high thickness application (between 15mm to 80mm) by hand or wet spray technique, meeting the requirements of class R4 of EN 1504-3.
Sika MonoTop®-412 NFG
Sika MonoTop®-412 NFG is a 1-component, polymer modified, fibre reinforced, low shrinkage repair mortar with corrosion inhibitor meeting the requirement of class R4 of EN 1504-3.
SikaGrout® HT System
SikaGrout® HT System is a two-component free flowing and shrinkage compensated, cementitious, pourable mortar for high-thickness works such as anchoring, precision grouting, filling and base plating, meeting the requirements of EN 1504-6. For thickness between 15mm to 120mm.
Sikadur®-42 SP is a 3-component epoxy resin mortar with high mechanical resistance, based on solvent-free epoxy resins and special granulometry fillers, used for pouring, due to its fluidity and ease of application. For thickness between 6mm to 50mm.
● Protection against rising dump
Protection against rising dump
This effective and economical system is designed for a durable renovation of damp and salt-damaged walls: Damp- and salt containing masonry, interior and exterior, perimeter and basement space, historic buildings and preservation of monuments.
SikaMur® Finish is a ready-mixed, lime based and cement free, thin layer render for finishing breathable renders.
SikaMur®-1000 SP is a ready-mixed, high-porosity breathable dehumidifying renovation mortar, in accordance with Class R, EN 998-1. It makes use of special light weight aggregates, lime and cement. SikaMur®-1000 SP is suitable for treatment and rehabilitation of masonry subject to rising humidity, additionally improving the thermal performance. SikaMur®-1000 SP is designed to be both hand and machine applied.
SikaMur® InjectoCream-100 is a new concept for the control of rising damp. SikaMur® InjectoCream-100 is a water repellent cream, packed in a 600 ml sausage or 300 ml cartridge. It is inserted into a series of holes drilled into a mortar course of the masonry by means of a simple application gun - no special injection pump required. Once injected into the mortar course, SikaMur® InjectoCream-100 will diffuse within the damp wall to form a Damp Proof Course (DPC), will allow the wall to dry and block future rising damp. SikaMur® InjectoCream-100 complies with the requirements of WTA Guideline 4-4-04/D “Injection of masonry in order to avoid capillary moisture content”.
SikaMur® Color E
SikaMur® Color E is a one component water-based paint containing minerals and acryl siloxanic resin, especially suitable for breathable and decorative painting of conventional or breathable plasters and concrete.
SikaMur® Grout+ is a ready-mixed grout based on Natural Hydraulic Lime (NHL 3.5). It is a cement free, highly fluid grout, for consolidation of masonry structures. It is applied by gravity, pouring it into holes or by low-pressure injection.