Description
Fastfill – R4 Rapid Setting Structural Concrete Repair Mortar
Fastfill is a rapid setting, fibre reinforced, polymer-modified concrete repair mortar designed for high strength structural repairs in demanding environments.
Classified as R4 to EN 1504-3, it delivers exceptional early strength, durability, and waterproof performance, making it ideal for roads, bridges, marine structures, and heavy-duty repairs.
Key Features & Benefits
- R4 structural repair mortar – high strength and load-bearing performance
- Rapid setting – sets in ~10 minutes at 20°C
- Fast return to service – traffic-ready in as little as 2 hours
- Fibre reinforced – enhanced durability and crack resistance
- Shrinkage compensated – ensures long-term stability
- Waterproof and low permeability – protects against water ingress
- No primer required (in most cases) – faster installation
- Works in extreme conditions – suitable down to -10°C
Applications
Fastfill is ideal for:
- Highway and runway repairs
- Bridge decks and structural concrete repairs
- Industrial floors and heavy wear areas
- Marine and tidal zone repairs
- Concrete repairs in potable water environments
- Rapid repairs to footpaths, slabs, and infrastructure
Technical Overview
- Type: Polymer-modified fibre reinforced repair mortar
- Classification: R4 (EN 1504-3)
- Compressive Strength: ~60 MPa (28 days)
- Early Strength: ~14 MPa (1 hour), ~40 MPa (24 hours)
- Bond Strength: ~3.4 MPa
-
Layer Thickness:
- 5 mm – 100 mm (typical)
- Up to 300 mm when bulked out
- Working Time: ~10 minutes at 20°C
- Coverage: ~1.33 m² at 10 mm per 25 kg
- Yield: ~13.3 litres per 25 kg bag
(As shown in the technical table on page 3, Fastfill achieves rapid early strength with 14 MPa in just 1 hour.)
Why Choose Fastfill?
Fastfill is engineered for speed and performance, allowing contractors to complete structural repairs quickly without compromising strength or durability. Its rapid curing and early strength gain make it ideal for projects where downtime must be minimised.
Frequently Asked Questions (FAQs)
❓ What is Fastfill used for?
It is used for rapid structural concrete repairs, especially in high-traffic and critical infrastructure areas.
❓ How quickly does it set?
It sets in approximately 10 minutes at 20°C.
❓ When can the repaired area be used?
Repairs can be walked on after 1 hour and opened to traffic after 2 hours.
❓ Is it suitable for marine environments?
Yes, it is suitable for marine and tidal repairs due to its rapid setting and durability.
❓ Does it require a primer?
In most cases, no primer is required, speeding up application.
❓ Can it be used in cold conditions?
Yes, it can be applied in temperatures down to -10°C (with precautions).
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