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Mapei - Mapegrout Hi Flow
  • Mapei - Mapegrout Hi Flow

Mapei - Mapegrout Hi Flow

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£32.12
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£38.55 Tax incl.

Mapei - Mapegrout Hi Flow is a ready-mixed fibre-reinforced mortar in powder form composed of highly resistant cements, selected aggregates, special admixtures and synthetic fibres that is used to repair structures where particular thicknesses and the state of deterioration require the use of high flow mortars.

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Mapei - Mapegrout Hi Flow is a ready-mixed fibre-reinforced mortar in powder form composed of highly resistant cements, selected aggregates, special admixtures and synthetic fibres that is used to repair structures where particular thicknesses and the state of deterioration require the use of high flow mortars.

Recommended Use

  • Structural reinstatement of reinforced concrete beams and pillars.
  • Restoring the lower flanges of pre-stressed concrete beams of viaducts.
  • Reinstatement of floor beams and slabs after scarification of deteriorated areas. 
  • Restoring concrete floors (industrial, road and airport).
  • Grouting rigid joints between concrete elements.

Application Procedure

Preparing the substrate

  • Remove degraded and loose concrete until the substrate is sound, resistant and rough, with more than 5 mm coareness. Any previous restoration work which is not soundly bonded should also be removed.
  • Clean the concrete and reinforcing rods by sandblasting, to remove all dirt, rust, cement laitance, grease, oil, and previously applied paints.
  • Soak the substrate with water.
  • Allow the excess water to evaporate before pouring in the mix; if necessary, use compressed air to facilitate the removal of the excess water.

Preparing the mortar

Pour 3.25-3.5 litres of water into a cement mixer and then slowly add Mapegrout Hi-Flow. If improved open-air curing of the mortar is required, add Mapecure SRA at the end of the mixing phase at a dosage of 0.25% by weight of the mortar (0.25 kg every 100 kg of Mapegrout Hi-Flow).

Mix for 3-4 minutes, scrape any unmixed powder off the sides of the mixer and remix for another 1-2 minutes until the mix is fluid and free from lumps. Depending on the quantity being prepared, a mortar mixer or a drilling machine with a stirrer attachment can be used. Avoid stirring an excess of air into the mix.

Mapegrout Hi-Flow has a pot life of 1 hour at +20°C. The expansion of Mapegrout Hi-Flow has been calculated to compensate for hygrometric shrinkage. To be effective, the forces of expansion must be countered with suitable reinforcement or formwork around the substrate. Without formwork, Mapegrout Hi-Flow can only be applied in thicknesses greater than 40 mm on the condition that reinforcing rods have been fixed. The reinforcement cover must be at least 20 mm thick. Smaller thicknesses can be applied without reinforcement as long as the substrate is sufficiently rough to be able to counter the expansion. The expansion phase is completed during the first days of curing.

Applying the mortar

To facilitate the expulsion of air, pour Mapegrout Hi-Flow continuously into the formwork by one side only. Water from Mapegrout Hi-Flow must not be absorbed by the formwork, which we recommend to be pre-treated with a formrelease oil (e.g. MAPEI’s DMA 1000 Form Release Agent). The pour does not need to be vibrated. Make sure that all the parts to be repaired have been filled. If necessary, use sticks or rods to tamp the slurry into particularly difficult areas. The repair process is complete when a coat of Elastocolor Paint is applied on the surfaces.

Mapei
MAP-MGHF

Data sheet

Type
Mortar
Size
25KG
For Use On
Concrete
Application Method
Pour into Formwork

Specific References

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Mapei - Mapegrout Hi Flow

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Mapei - Mapegrout Hi Flow

Mapei - Mapegrout Hi Flow

£32.12
Tax excluded
£38.55 Tax incl.