Class R4 with fine grain: this thixotropic mix with polymer fibre and a maximum grain size of 1 mm is intended for structural repair of shallow spalls and gouges on vertical, inclined and overhead surfaces. It is used on bridges and overpasses, in tunnels and metro, on dams, tanks and treatment plants, columns and beams. After 28 days the mix reaches 60.0 MPa in compression (B45), watertightness W18, frost resistance F1 600, bond to substrate 2.5 MPa.
| 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 | Dry construction mix with polymer fibre, fine-grained, non-shrink, thixotropic type, on a cement binder, with a maximum grain size of 1 mm |
| Packaging | 25 kg bags (three-ply with a polyethylene liner) |
| Application method | For structural repair of overhead, inclined and vertical surfaces with local damage (spalls, gouges, etc.) up to 20 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: 1.0; mixing water, l per 1 kg: 0.15…0.17; workability retention, min: 40; workability: cone penetration 4–8 cm (Pk2), spread 170-190 mm; bond strength to substrate, MPa: 2.5; strength after 24 h: flexural 5.0 / compressive 20.0 MPa; strength after 28 days: flexural 7.0 (Btb5.2) / compressive 60.0 (B45) MPa; modulus of elasticity, GPa: 25.0; sulphate resistance group: III; contact zone frost resistance: Fkz 75; frost resistance: F1 600, F2 200; watertightness: W18 |
| Shelf life | 12 months from the date of manufacture; storage at -30…+40 °C, humidity no more than 70 % |
| Standards | Pk2, B45, Btb5.2, W18, F1 600 to GOST 31357-2007 (taking into account the requirements of GOST R 56378-2015, class R4); TU 23.64.10-002-76310469-2021 |
Data from the manufacturer’s technical data sheet. The coating system, number of coats and quantity are selected for your project on request.
Flowable cementitious grout for high-precision grouting of equipment, anchor starter bars and joints; fibre already in the mix, 100 MPa compressive after 28 days.
Coarse-grained R3 mix with an antifreeze admixture for non-structural repair of walls, columns and ceilings down to −10 °C without heating.
Rapid-hardening thixotropic mix for urgent repair of walls, ceilings and columns at −10…+7 °C; 12.0 MPa compressive after 2 h.
Fine-grained thixotropic mortar for urgent repair of spalls and cavities on walls, columns and ceilings in frost down to −20 °C; 12.0 MPa compressive after 2 h.
High-strength flowable mix for grouting machine tools and equipment, installing anchors and filling joints in reinforced concrete; 80.0 MPa compressive after 28 days.
Low-viscosity epoxy resin for injecting cracks 0.1–0.8 mm wide through packers in columns, beams and floors; adhesion to concrete from 3.0 MPa.
