Rapid-setting cementitious mortar engineered for vertical and overhead concrete repairs with strong bond and durable finish.
Summary Benefits at a Glance
·Strong Bond – Excellent adhesion to concrete and reinforcement.
·Fast Turnaround – High early strength and quick setting.
·Durable Finish – Low shrinkage, crack and water-penetration resistance.
·Easy Placement – Trowel/spray friendly for vertical and overhead work.
Product Introduction
Fast Repair Type I is a specialized cementitious mortar for vertical and overhead structural repairs. It restores damaged protective layers, honeycombs, voids and surface defects, providing high early strength, robust adhesion and a low-shrinkage finish. The formulation resists cracking, carbonation and water penetration, improving service life of repaired sections. Recommended for bridges, tunnels, industrial plants, building façades and soffits where rapid reopening is required.
Product Parameters
| Item | Fast Repair Type I | Notes |
| 2 h Compressive strength (MPa) | ≥ 20 | Rapid load readiness |
| 24 h Compressive strength (MPa) | ≥ 30 | High early strength |
| 28 d Compressive strength (MPa) | ≥ 50 | Durable structural repair |
| Working time after mixing | ~30 min | Ambient 20–25 °C |
| Final set time | ~60 min | Ambient 20–25 °C |
| Recommended layer thickness | ≥ 3 mm (per pass 5–10 mm) | Multi-pass for large depth |
| Shrinkage / cracking resistance | Low shrinkage; anti-cracking | Suitable for V/O areas |
| Water penetration resistance | High | Dense, durable finish |
Product Usage
Surface Preparation
Remove loose concrete, laitance, dust, oils; expose sound substrate.
Pre-wet substrate to SSD (saturated surface-dry); keep moist 2–3 h before repair.
Priming
Brush on a bonding slurry (cement:water ≈ 1:1) or specified primer; place mortar while surface is tacky.
Mixing
Water-to-mortar ≈ 0.14–0.16 by weight.
Mechanical mix 2–3 min to a cohesive, non-sag paste.
Placement
Apply with trowel or spatula; build up 5–10 mm per pass for vertical/overhead, compact well.
Finish as required; avoid over-trowelling.
Curing
Protect from sun, frost and vibration. Moist cure ≥ 24 h.
Minimum application temperature ≥ 5 °C.
Coverage (guide)
≈ 18–20 kg/m²·10 mm thickness.
Packaging & Storage
25 kg composite kraft bags; shelf life 6 months in cool, dry, ventilated storage.
Product Documentation
Vertical & Overhead Repair Cementitious Mortar
Vertical & Overhead Repair Cementitious Mortar (Fast Repair Type I) | Rapid-Setting Structural Patch
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Our products have undergone rigorous testing at our national testing laboratory (CABR testing center co., ltd). Renowned Fortune Global 500 firms such as China Railway Group Limited, China Communications Construction Company Limited, and Sinohydro are among our esteemed clients.
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