Mapegrout Hi-Flow is a ready-mixed mortar in powder form composed of highly resistant cements, selected aggregates, special admixtures and synthetic fibres prepared according to a formula developed in the MAPEI Research & Development Laboratories.
Ideal in the repair of structures where particular thicknesses and the state of deterioration require the use of high flow mortars.
Mapegrout Hi-Flow when mixed with water, becomes a highly fluid mortar, suitable for pouring into formwork without separation of the aggregates even when forming great thicknesses.
If Mapegrout Hi-Flow is prepared by only adding water, it must be cured under damp conditions in order to guarantee that the product’s expansive properties develop completely and correctly. However, it is not easy to ensure these conditions on site.
To guarantee the expansive properties of Mapegrout Hi-Flow in the open air, 0.25% of Mapecure SRA, a special admixture which has the property of reducing both plastic and hydraulic
shrinkage, may be used to great advantage by adding it to the mix.
Mapecure SRA has a very important role to play, in guaranteeing better mortar curing. When Mapecure SRA is mixed with Mapegrout Hi-Flow, it is considered a technologically advanced system, as the admixture has the capacity of slowing down the evaporation of the water from the mortar and of promoting the development of hydration reactions.
Mapecure SRA acts like an internal curing agent and, due to its interaction with some of the main components which make up the cement, it helps to reduce shrinkage by between 20 and 50% compared with the standard values of the product without the admix. This reduces the risk of cracking.
The product can be used also without using Mapecure SRA when environmental conditions permit an optimal curing.
- High flexural and compressive strength;
- The modulus of elasticity and coefficients of thermal expansion and permeability to water vapour are similar to those of high quality concrete;
- Very high adhesion to old concrete, when it has been saturated with water beforehand, and to reinforcing rods especially if they have been treated with Mapefer or Mapefer 1K;
- High resistance to wear from abrasion.
- 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.