Ready, one-component polymer-cement mortar (PCC), containing microsilica, reinforced with synthetic fibers. It is a repair and conditioning mortar for filling defects in concrete with or without the Sika Repair-10 F bonding layer. The mortar can be applied by hand or by wet spraying.

Features

• material supplied ready for use, requires mixing only with water
• ease of preparation and application
• class R3 in accordance with PN-EN 1504-3
• the possibility of obtaining a different, smooth surface
• good mechanical properties, tightness
• resistance to chemical aggression

Application

• structural and non-structural repairs by manual method concrete in environment exposed to increased aggression, e.g. in general construction, hydrotechnical construction: dams, dams, reservoirs, channels, sewage treatment plants in, according to the industry: shafts, pavements, underground workings
• suitable for repair work (principle 3, methods 3.1 and 3.2 of PN-EN 1504-9) - repairing peeled or damaged concrete in buildings and other reinforced concrete structures (manual application of repair mortar, application of a mortar layer)
• suitable for structural reinforcement (principle 4, method 4.4 of PN-EN 1504-9) - increasing the load-bearing capacity of the concrete structure by adding a mortar layer
• suitable for maintaining or restoring passivity (principle 7, method 7.1 and 7.2 of PN-EN 1504-9) - increasing the thickness of the reinforcement cover and replacing damaged or carbonated concrete
• in the Sika Repair F concrete repair system, Sika Repair-20 F is intended for local filling of defects in layers up to 3 cm thick and for leveling concrete surfaces in layers with a thickness of 0.5 to 1.5 cm
• application without the use of a tack coat; in special cases, the bonding layer may turn out to be technologically necessary, e.g. on smooth surfaces, in an overhang and ceiling position under dynamic loads, such as vibrations, vehicle runs, thermal shocks, etc. as the bonding layer, then Sika Repair should be used - 10 F

Technical data

• chemical base cement, polymer, microsilica, synthetic fibers, selected aggregate, special additives
• appearance / color gray powder
• density ~ 2.03 kg / dm ³ (density of hardened mortar after 28 days)
• maximum grain size D _max 1.2 mm
• content of soluble ions in chloride ≤ 0.05% (according to PN-EN 1015-17)
• compressive strength ≥ 25 MPa, class R3 28 days: ~ 51 MPa (according to PN-EN 12190)
• modulus of elasticity in compression ~ 24 GPa (according to PN-EN 13412)
• peel strength ~ 2.2 MPa (according to PN-EN 1542)
• thermal compatibility, part 1: freeze-thaw ~ 1.9 MPa (according to PN-EN 13687-1)
• reaction to fire class A1 (according to PN-EN 13501-1)
• capillary absorption ≤ 0.5 kg m ^-2 h ^-0.5 (according to PN-EN 13057)
• Corrosion test meets according to PN-EN 13295
• mixing ratio Sika Repair 20 F: water - 100: 14 by weight 3.5 liters of water per 25 kg bag
• theoretical consumption: ~ 18.5 kg / m ² / cm; practical consumption depends on the roughness of the substrate, application method and losses during application
• layer thickness minimum 0.5 cm / maximum 1.5 cm - conditioning mortar; for minor repairs, local defects - maximum 3 cm
• ambient and substrate temperature when applying minimum +5 C / maximum +30 C
• storage conditions: store in a dry room, in closed and undamaged packages; protect from moisture; best to use within 6 months from the production date
• package 25 kg bag