Flexcrete Tiefill is a single component, polymer modified, fibre reinforced, Portland cement-based repair compound which exhibits unique hydraulic properties to produce a rapid setting mortar.

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• Features & Benefits
• Preparation
• Mixing
• Application & Curing
• Application Top Tips
• Technical Data

Features & Benefits

• Sets in 30 minutes at 20°C, yielding a durable, high strength mortar
• Resists 10 bar water pressure after 72 hours’ curing
• Bond strength exceeds tensile strength of concrete, ensuring monolithic performance
• Class R4 mortar, suitable for repair methods 3.1, 7.1, 7.2 as defined by EN 1504-3
• UKCA & CE marked in accordance with EN 1504-3
• Listed under Regulation 31 - England and Wales: Regulation 33 - Scotland: Regulation 30 - NI: for use with potable water
• Highways Standard Series 5700 (Concrete Repairs) and CS 462 (Repair & Management of Deteriorated Concrete Structures)

Preparation

The areas to be repaired must be free from all unsound material including laitance dust, oil, grease, corrosion byproducts and organic growth. Smooth surfaces should be roughened by appropriate mechanical means. The compressive strength of the parent concrete should be minimum 20 MPa.

For the treatment of tie-holes formed by through-ties, cut back and remove any remaining plastic tube to circa 40- 50mm from the concrete face. To eliminate the possibility of water tracking around the plastic tube, it should be plugged with a proprietary stopper.

The prepared substrate should be thoroughly soaked with clean water until uniformly saturated without standing water.

Mixing

Mix sufficient Tiefill to use within the working life of the material. Adding the water first, use the mixing scoop to proportion 1 part of water with 6 parts of powder. This equates to a mix ratio of 9.4:1 by weight.

A complete 8kg pack requires 850ml of clean water. Quantities less than 2kg can be mixed by hand. Larger quantities should be mechanically mixed in a clean drum using a slow speed drill and paddle. A normal mixer is not suitable.

Mix for 2-3 minutes to produce a cohesive thixotropic mortar. If necessary, adjust the consistency by adding a minimal amount of extra powder or water. Use without delay.

• Note - These instructions must be adhered to as the manufacturer will not be responsible for failure due to incorrect mixing.

Application & Curing

For normal applications, Tiefill should be compacted, using a placing technique to remove entrapped air, in layers not exceeding 75mm deep.

For multi-layer applications, it is important to ensure that the previous layers are well keyed and stable but not fully set (typically 30-45 minutes) prior to the application of subsequent layers.

Final profiling of a high quality can be easily achieved with a clean, dampened steel float.

Do not use Tiefill when the temperature is below 5°C and falling. Not suitable for use on trafficked areas. All tools should be cleaned with water immediately after use. Materials can be stored for 12 months in dry, frost freeconditions with unopened bags at 20°C.

Application Top Tips

• Take care if using very cold mixing water as this will accelerate setting of Tiefill
• Do not wet out or prime between layers
• Do not over trowel. If the mortar begins to slump, allow to stabilise and refinish
• When finishing, trowel from centre out towards the perimeter working into the edges of the tie hole
• Tiefill is particularly suited to cold weather use but should not be applied to frozen substrates
• Hot Weather Working - Store material in cool conditions to maximise working life. Shade applied material from strong sunlight. If possible, avoid extreme temperatures by working at night

Technical Data