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CarbonWrap

CarbonWrap® Repair ST repair mortar — thixotropic mix with fibre

Thixotropic repair mortars

CarbonWrap Repair ST is a fibre-reinforced cement dry mix that restores the geometry of concrete, reinforced concrete, brick and masonry structures: spalls, potholes, cracks and traces of erosion. It is used in repair and reconstruction and when installing the CarbonWrap external reinforcement system, including as a base for CarbonWrap Grid carbon grids. At 28 days the mortar reaches at least 50 MPa in compression, has frost resistance F200 and water impermeability W8, and works at pH from 4 to 13 and at constant temperatures up to +250 °C.

Specifications

ManufacturerCarbonWrap — OOO “Nanotekhnologicheskiy tsentr kompozitov”, Moscow
Typethixotropic repair mortars
Usehydraulic structures and dams, tanks and treatment plants, industrial buildings, tunnels and metro, bridges and overpasses, floors
Basedry construction mix on a cement binder with fibre (PAN fibre); filler — sand; modifiers — chemical admixtures
Packagingpaper bags with a PE liner, 25 kg (GOST 2226-88)
Application methodlocal restoration of geometry (spalls, potholes, cracks, erosion) of concrete, reinforced concrete, brick and masonry structures during repair, reconstruction and installation of the CarbonWrap external reinforcement system, incl. under CarbonWrap Grid carbon grids; remove weakened concrete mechanically down to sound concrete, chase out cracks to at least 5×5 mm, clean, dampen without standing water; water 0.15 l per 1 kg of dry mix, water at 20 ± 2 °C; pour the mix into the water, mix for at least 2 min, pause 10 min, remix; adding more water later is prohibited; apply to the damp substrate with a spatula or trowel, level with a vibrating screed or floats; not recommended for repairing asphalt concrete
Application temperatureair and structure +5…+35 °C for 24 hours; at lower temperatures — ensuring a surface temperature of not below +5 °C (heated enclosures, heat guns)
Curing24 h after application keep moist with water for 3 days; initial foot traffic — after 7 h; organic coatings — after 3 days, mineral finishes — not earlier than after 24 h
Key propertiescompressive strength at 28 days at least 50 MPa; flexural strength at 28 days at least 8.5 MPa; bond strength to concrete at 28 days at least 1.5 MPa; frost resistance at 28 days at least F200; frost resistance of the contact zone at least Fkz 50; water impermeability at 28 days at least W8; workability grade Pk 2 (at a water demand of 0.18 l per kg); retention of initial workability at least 60 min; working time of the mortar mix no more than 40 min; residue on a 2.5 mm sieve no more than 2.0 %; bulk density 1.4–1.7 g/cm3; moisture content as supplied no more than 0.2 %; service in aggressive media at 4 < pH < 13 (H2SO4 pH 4, NaOH pH 13, mineral oil, kerosene, AI-95 petrol) and under constant exposure to temperatures up to +250 °C; hazard class 3 (GOST 12.1.007)
Shelf life12 months from the date of packing; in dry rooms in the manufacturer's packaging; at temperatures above +30 °C protect from direct sunlight
StandardsTU 5745-053-38276489-2017 (TU 23.64.10-053-38276489-2017); GOST 31357-2007

Data from the manufacturer’s technical data sheet. The coating system, number of coats and quantity are selected for your project on request.

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