Reduced cracking distinguishes this model: the formulation includes an expansive admixture and modifying admixtures that reduce crack formation, and graded sand up to 3 mm serves as the aggregate. The class R4 mortar is intended for structural repair and strengthening of vertical, inclined and overhead surfaces on bridges, in tunnels, on dams, tanks, columns and beams. After 28 days: 65.0 MPa in compression (B50), W20, F1 1000; produced to TU 23.64.10-002-16213962-2025.
| Manufacturer | Pakol — OOO “NPO Pakol”, Vysokaya Gora |
|---|---|
| Type | thixotropic repair mortars |
| Use | bridges and overpasses, tunnels and metro, hydraulic structures and dams, industrial buildings, tanks and treatment plants, columns and beams |
| Base | Coarse-grained dry mix of a cement binder, polymer fibre, an expansive admixture, graded sand up to 3 mm and modifying admixtures that reduce cracking |
| Packaging | 25 kg bags (three-ply with a polyethylene liner) |
| Application method | For structural repair and strengthening of overhead, inclined and vertical surfaces with local damage (spalls, gouges, etc.) up to 50 mm deep |
| Application temperature | optimum +18…+30 °C; permitted from +5 °C |
| Curing | moist curing for 2 days (covering with film, spraying with water) |
| Key properties | aggregate size, mm: 3.0; mixing water, l per 1 kg: 0.14…0.16; workability retention, min: 40; workability: cone penetration 4–8 cm (Pk2), spread 165-180 mm; bond strength to substrate, MPa: 2.5; shrinkage strain: 0.5 (0.05); strength after 24 h: flexural 6.0 / compressive 30.0 MPa; strength after 28 days: flexural 9.0 (Btb6.8) / compressive 65.0 (B50) MPa; modulus of elasticity, GPa: 25.0; sulphate resistance group: III; contact zone frost resistance: Fkz 100; frost resistance: F1 1000, F2 300; watertightness: W20 |
| Shelf life | 12 months from the date of manufacture; storage at -40…+50 °C, humidity no more than 70 % |
| Standards | Pk2, B50, Btb6.8, W20, F1 1000 to GOST 31357-2007 (taking into account the requirements of GOST R 56378-2015, class R4); TU 23.64.10-002-16213962-2025 |
Data from the manufacturer’s technical data sheet. The coating system, number of coats and quantity are selected for your project on request.
Basic microcement grade with particles up to 0.1 mm: it is used to prepare an injection grout for bases, soils and internal damage in masonry and concrete.
Coarse-grained flowable R4 mix for structural repair of floors, roads, airfields and bridges; frost resistance F1 1000, watertightness W20.
Fine-grained thixotropic R4 mortar for structural repair of shallow spalls on bridges, in tunnels and on columns; watertightness W18.
Mix with steel and polypropylene fibre for repair and strengthening of structures under dynamic and vibration loads; flexural strength 11.0 MPa (Btb8.0).
Finely dispersed flowable R4 mix for thin-layer structural repair of floors, roads and bridges; aggregate size 0.2 mm, compressive 60.0 MPa.
Thixotropic B60 mix with a modulus of elasticity of 27.0 GPa for strengthening reinforced concrete columns, beams and walls of buildings and bridges; flexural 12.0 MPa.
