REKS® Strukto 300 — rapid-setting R4 mortar for repair and joint filling
Thixotropic class R4 cementitious mortar for fast concrete repair and joint filling in industrial buildings and tunnels; from 30 MPa after one day.

REKS® Fab-10P is a fibre-reinforced non-shrink cementitious concrete mix supplied as a 35 kg kit: a 25 kg bag of dry mix and a 10 kg pail of crushed granite. It is used to repair airfield and road pavements with partial or full slab replacement, industrial floors and shopping-centre floors, bridge piers, beams and slabs, and for monolithic grouting of joints in precast reinforced concrete. Class R4 per GOST R 56378, aggregate size 10 mm, compressive strength at least 30 MPa after one day and 65 MPa after 28 days, freeze-thaw resistance F2 400.
| Manufacturer | REKS — OOO “SPS” |
|---|---|
| Type | flowable repair mortars |
| Use | roads and airfields, floors, bridges and overpasses, hydraulic structures and dams, tanks and treatment plants |
| Base | fibre-reinforced non-shrink cementitious concrete mix |
| Colour | grey |
| Packaging | kit 35 kg; component 1: dry mix, bag 25 kg; component 2: crushed granite, plastic pail 10 kg |
| Application method | repair of airfield and road pavements with partial or full replacement of pavement slabs; repair of concrete and reinforced concrete structural elements, including sloped bases; repair of reinforced concrete bridge piers, beams and deck slabs working under static and moderate dynamic loads; monolithic grouting of joints in precast reinforced concrete structures (piers, concrete slabs, etc.); repair of hydraulic structures |
| Application temperature | not below +5 °C |
| Curing | protection from precipitation for at least 24 h; in hot and windy weather — water spraying and covering with film |
| Key properties | modulus of elasticity: ≥25,000 MPa; density of hardened mortar: 2.4 ± 5 % t/m³; freeze-thaw resistance: F2 400; bond to substrate at 28 days: ≥2.0 MPa; water impermeability: W16; compressive strength at 28 days: ≥65 MPa; flexural strength at 1 day: ≥5 MPa; flexural strength at 28 days: ≥7 MPa; bond to substrate at 28 days after 50 freeze-thaw cycles in salts: ≥2.0 MPa; aggregate size: 10 mm; flowability retention: 30 minutes; compressive strength at 1 day: ≥30 MPa; flowability (concrete flow trough): 30–60 seconds; 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.
Thixotropic class R4 cementitious mortar for fast concrete repair and joint filling in industrial buildings and tunnels; from 30 MPa after one day.
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