BIRSS 59 — non-shrink class R4 repair mix for floors
Rapid-hardening flowable mix for repairing industrial floors, equipment foundations, car parks and bridges; 30 MPa after just 3 days.

Coarse granite aggregate of 5.0–10.0 mm fraction is included in the BIRSS RBG M500 kit as a separate component, together with a dry mix based on special cements and quartz sand. The mix is used for structural repair of horizontal and inclined surfaces such as ramps and bridge abutments, to eliminate large defects in drainage channels, bases of road and airfield pavements and industrial floors, and for monolithic joining of joints between floor slabs and foundation walls. Class R4; at 28 days 50 MPa in compression and 7 MPa in flexure, W16, F2 400.
| Manufacturer | BIRSS — AO Opytny Zavod Sukhikh Smesey (Experimental Dry Mix Plant), Moscow |
|---|---|
| Type | thixotropic repair mortars |
| Use | bridges and overpasses, roads and airfields, floors |
| Base | BIRSS RBG M500 dry repair mix is a material based on special cements, graded quartz sand, mineral fillers, chemical admixtures and coarse granite aggregate of 5.0-10.0 mm fraction. The coarse aggregate is supplied as a separate component (… |
| Colour | grey |
| Packaging | kit A+B 32.5 / 52 kg |
| Application method | BIRSS RBG M500 is a two-component repair mix intended for: structural repair and restoration of horizontal and inclined surfaces of concrete and reinforced concrete structures (ramps, bridge abutments); eliminating large defects in drainage channels, bases of road and airfield pavements, structural elements of bridges and industrial floors; filling joints and rigid monolithic joining of joints between concrete floor slabs and foundation walls, inspection wells, water… |
| Application temperature | +5…+35 °C |
| Key properties | maximum aggregate size, mm: 5.0/10.0; workability grade: Pk2/4-8; workability retention, min: 20; bond strength to substrate, MPa: 2; compressive strength, MPa, not less than - 3 / 7 / 28 days 20 / 30 / 50; flexural strength at the age of 28 days, MPa, not less than 7; modulus of elasticity, MPa: 25,000; water impermeability: W16; frost resistance: F2 400; service temperature, °C: from -50 to +70 |
| Standards | class R4 to 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.
Rapid-hardening flowable mix for repairing industrial floors, equipment foundations, car parks and bridges; 30 MPa after just 3 days.
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