REKS® Strukto R3 — rapid-setting class R3 mortar for repair and levelling
Non-shrink fibre-reinforced R3 mortar for repair, finishing and local levelling of concrete, including precast elements; 35 MPa at 28 days.

Structural repair and restoration of reinforced concrete structures are the main task of REKS® R4, a non-shrink fibre-reinforced thixotropic mortar of class R4 per GOST R 56378. It is used for local repair of damaged and deteriorated elements in interior and exterior work on vertical, horizontal and overhead surfaces — in industrial buildings, on columns, beams and hydraulic structures. Compressive strength is at least 25 MPa after one day and 60 MPa after 28 days, flexural strength at 28 days from 9 MPa, and flowability is retained for at least 45 minutes.
| Manufacturer | REKS — OOO “SPS” |
|---|---|
| Type | thixotropic repair mortars |
| Use | industrial buildings, columns and beams, hydraulic structures and dams |
| Base | non-shrink fibre-reinforced thixotropic cementitious mortar for repair and levelling of concrete surfaces |
| Colour | grey |
| Packaging | bags 25 kg |
| Application method | structural repair and restoration of reinforced concrete structures; local repair of damaged and deteriorated elements of concrete and reinforced concrete structures; for interior and exterior work, on vertical, horizontal and overhead surfaces |
| Application temperature | +5…+30 °C |
| Key properties | modulus of elasticity: ≥20,000 MPa; density of hardened mortar: 2.25 ± 5 % t/m³; freeze-thaw resistance: F2 300; bond to substrate at 28 days: ≥2.2 MPa; water impermeability: W16; compressive strength at 28 days: ≥60 MPa; flexural strength at 1 day: ≥5 MPa; flexural strength at 28 days: ≥9 MPa; bond to substrate at 28 days after 50 freeze-thaw cycles in salts: ≥2.0 MPa; aggregate size: 2.5 mm; flowability (truncated cone spread on a flow table): 110–135 mm; flowability retention: ≥45 minutes; compressive strength at 1 day: ≥25 MPa; capillary water absorption: no more than 0.4 kg/(m²·min⁰·⁵); sulphate resistance coefficient (365 days): 0.982 % |
| Shelf life | 12 months from the date of manufacture |
| Standards | class R4 per GOST R 56378 |
Data from the manufacturer’s technical data sheet. The coating system, number of coats and quantity are selected for your project on request.
Non-shrink fibre-reinforced R3 mortar for repair, finishing and local levelling of concrete, including precast elements; 35 MPa at 28 days.
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