Mapegrout SV-Fiber

Flowable, shrinkage compensated, quick setting and hardening, high-ductility cementitious mortar, applied at temperatures as low as -5°C, with stiff steel fibres, for repairing concrete.

Available in a 25kg unit.

Technical Description

Mapegrout SV Fiber is a pre-blended mortar in powder form, made from special hydraulic binders, high-strength cement, selected graded aggregates, special admixtures, and stiff, hooked fibres in brass-plated steel according to a formula
developed in MAPEI’s own research laboratories.

The stiff, hooked fibres in brass-plated steel contained in Mapegrout SV Fiber have the following characteristics:
· length: 30 mm;
· diameter: 0.38 mm;
· tensile strength: > 2,600 MPa.

When Mapegrout SV Fiber is mixed with water, it forms a fluid mortar which is suitable for casting into formwork, without segregation, at a thickness of between 1 and 5 cm.

Once hardened, Mapegrout SV Fiber has the following characteristics:
· high flexural and compressive strength;
· modulus of elasticity, thermal expansion coefficient and permeability coefficient similar to high quality concrete;
· impermeable to water;
· excellent bond strength to old concrete, if dampened with water before application, and to reinforcement rods, especially if treated beforehand with Mapefer or Mapefer 1K;
· high resistance to wear due to abrasion or impact.

Mapegrout SV Fiber meets the main requirements of EN 1504-9 (“Products and systems for protecting and repairing concrete structures: definitions, requirements, quality control and conformity assessment. General principles for the use and application of systems”), and the minimum requirements for EN 1504-3 (“Structural and non-structural repairs”) for R4-class structural mortars.

Mapegrout SV Fiber is recommended for thicknesses of up to 5 cm. If a thicker layer is required, we recommend the addition of 30 to 50% in weight of a suitable size aggregate; refer to our Technical Services Department for further details.

Thanks to its rapid hardening properties, Mapegrout SV Fiber may be walked on and opened to rubber-wheeled traffic after only 2 hours from application at a temperature of +23°C.

Areas of Use

Repairing concrete structures where high thicknesses and special shapes of deterioration require the use of a free-flowing mortar, including at low temperatures.

Some application examples
· Repairing concrete floors (industrial, roads, airports).
· Repairing hydraulic structures (breather channels, canals and forced run-off channels).
· Restoration of floor slabs after removing deteriorated areas by scarifying.
· Repairs to joints in motorways.
· Rebuilding and levelling off the upper parts of base plinths and reinforced concrete bearing elements on motorway viaducts.
· Repairing lower spigots on pre-compressed beams for viaducts.