Mapei Mapegrout SV Fiber

Mapei Mapegrout SV Fiber is a flowable, shrinkage compensated, quick setting and hardening, high-ductility cementitious mortar with stiff steel fibres for concrete repair. Suitable for application down to temperatures as low as -5°C.

Best Uses

Mapei Mapegrout SV Fiber is suitable for repairing concrete structures where high thickness's and special shapes of deterioration require the use of a free-flowing mortar, including at low temperatures.

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.

Mapei Mapegrout SV Fiber is suitable for:

• 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

When Mapegrout SV Fiber is mixed with water, it forms a fluid mortar which is suitable for casting into form work, 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

Application

Preparation of the substrate
Remove all deteriorated and loose concrete to form a solid, rough and strong substrate. Any areas previously repaired and which are not perfectly bonded must also be removed. Remove all dust, rust, cement laitance, grease, oil and old paint from the concrete and reinforcement rods by sandblasting. Saturate the substrate with water. Before casting, wait until excess surface water has evaporated off. Use compressed air to accelerate this process if required.

Preparation of the mortar
Pour 3.4-3.6 litres of water into the cement mixer, slowly add Mapegrout SV Fiber. Mix for 2-3 minutes, remove all powder which has stuck to the walls of the mixer and mix again for 2-3 minutes to form a fluid, lump-free mix. A mortar mixer or drill with a mixer fitting may also be used, according to the quantity of mortar required. Avoid excessive air entrainment while mixing.

Mapegrout SV Fiber remains workable for approximately 20 minutes at +20°C. If there is insufficient boundary support, filling layers of Mapegrout SV Fiber thicker than 5 cm must only be applied after inserting reinforcing rods. A layer of at least 2 cm thick must be applied over the rods.

Application of the mortar
Pour Mapegrout SV Fiber in a continuous flow from one side only of the area to be filled, making sure that all air is expelled. Immediately smooth over the surface with a trowel. After application, Mapegrout SV Fiber does not require vibration. If applied in formwork, water must not be absorbed from Mapegrout SV Fiber. In this case, we recommend treating the form work with a form-release agent (for example Form Release Agent DMA 1000).