Tecfast Concrete is a single pre-mixed Portland cement based non-shrink concrete designed with selected graded silica aggregates and additives. The mixed product may be placed in sections of 20mm up to 650mm in a single pour.

Tecfast Concrete is suitable for all concrete works where early strength development is required in order to allow early use of the placed sections. The product may be used for localised repairs plus large area placement or re-instatement of concrete pavements.

The mixed concrete, when placed, will harden in approximately 20 minutes. The compressive strength gain will reach 22N/mm² within 2 hours allowing early opening of sections to foot and vehicular traffic.

The self-contained product only needs to be mixed with water on site. The product is chloride free and can be safely used in contact with steel reinforcement. After placement no special curing is required in moderate ambient conditions. In rapid drying conditions, expected rain or frost protection should be applied.

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• Features & Benefits
• Standards
• Typical Tecfast Concrete Properties @ 20°C
• Instructions For Use

Features & Benefits

• Non-flammable - Fire Class A1
• The volume yield of each 25kg bag of Tecfast Concrete is approximately 11.5 litres
• Suitable for the following repair methods as defined in BS EN 1504:
• 3.2 – Concrete restoration – recasting with concrete or mortar
• 4.4 – Structural strengthening – adding mortar or concrete
• 5.3 – Increasing physical resistance – adding mortar or concrete
• 6.3 – Resistance to chemicals – adding mortar or concrete
• 7.1 – Preserving or restoring passivity – increasing cover with additional mortar or concrete
• 7.2 – Preserving or restoring passivity
• Uses include:
• Concrete repairs to accept foot and vehicular traffic
• Forming of new pavement areas
• Re-instatement of deteriorated pavement areas
• Rapid repairs to roadways & runways
• Structural support situations

Standards

Typical Tecfast Concrete Properties @ 20°C

(At 20°C and 9% (2.25litres) water addition)

Instructions For Use

Preparation

Laitance and all loose material including dust, oil and grease should be removed in order to produce a sound substrate. The work area should be pre-wetted taking care to remove any standing water before placing the Tecfast Concrete.

Mixing

To achieve the most consistent concrete mix, mechanical mixing using a forced action mixer such as the Creteangle is recommended. Small mixes may be made using a heavy duty slow speed high torque drill and Mortar Stirrer.

Each 25kg bag of Tecfast Concrete requires 2.25 litres of water to give a medium workability concrete consistency. Excess water should not be added. Once setting of the concrete has commenced, further mixing should not be used to re-work the mix.

The concrete should be placed within approximately 15 minutes of mixing. The working time may be extended in cold ambient conditions and may be slightly shortened in hot ambient conditions. For cold weather working warm mixing water at up to 30°C may be used.

Part bag mixing should not be undertaken.

Placing

Mixed Tecfast Concrete should be placed onto the dampened prepared surface as soon as mixing is complete. Once placed fully compact the concrete to obtain maximum strength development. The bed thickness applied in a single application should be between 20mm to 650mm.

The placed concrete will have hardened sufficiently to carry out further work within some 20 minutes depending on the surrounding ambient conditions.

Curing

No special curing is required at temperatures between 5°C and 35°C. For placing at temperatures outside this range contact our technical team on 0113 2455450 (option 2) or send a message to [email protected].

At early ages do not allow placed concrete to rapidly dry and protect from rain and frost.