SikaRep 400 Extra 25kg

Reference: 0.38.157.043

In stock 1-3 Working Days

€24.19

Tax included

SikaRep 400 Extra Fibre-reinforced cementitious mortar

Description

Sika Fiber Reinforced Cement Mortar

SikaRep 400 Extra Fibre Reinforced Cementitious Mortar

SikaRep 400 Extra is a ready-to-use, fibre-reinforced, cementitious mortar for routine repair work in large thicknesses

Complies with the requirements of Class R4 of EN 1504-3

Advantages

Class R4 according to EN 1504-3
For application thicknesses between 5 mm and 35 mm for manual application (per coat)
Excellent workability, high thixotropy
Easy to handle and apply
Good adhesion to most common construction materials (concrete, steel)
Good dimensional stability
Suitable for repair work on concrete of medium to high strength class due to similar modulus of elasticity
High compressive, flexural and tensile strengths
Very good final finish

Features

Composition Portland Cement, selected aggregates, silica fume and additives
Density of fresh mortar: ~ 2,15 kg/lt
Maximum grain size ~1,8 mm
Soluble chloride content ≤ 0,05 % (EN 1015-17)
Compressive strength 1 day - ≥ 25 Mpa 7 days - ≥ 40 Mpa 28 days - ≥ 50 Mpa
Class R4 requirements @ 28 days - ≥ 45 Mpa
Modulus of elasticity in compression Results - 25 Gpa Class R4 requirements - ≥ 20 Gpa
Tensile bending strength 1 day - ≥ 4.0 Mpa 7 days - ≥ 5.5 Mpa 28 days - ≥ 8.0 Mpa
Tensile adhesion strength Results - ≥ 2,5 Mpa Class R4 requirements - ≥ 2,0 Mpa
Controlled shrinkage/expansion ≥ 2,0 Mpa (EN 12617-4)
Thermal compatibility ≥ 2,0 Mpa (EN 13687-1)
Fire behaviour Class A1
Capillary absorption ≤ 0,5 kg/m2 x √h (EN 13057)
Carbonation resistance dk ≤ martyr (MC (0,45)) (EN 13295)

Application

Mixing - SikaRep 400 Extra can be mixed with an electric hand mixer at low speeds (~ 500 r.p.m.) or with a mechanical forced drive mixer for larger volumes. Pour the water in the appropriate quantity into a suitable mixing container. While mixing slowly, add the powder to the water and mix thoroughly for at least 3 minutes, adding additional water during the mixing time, up to the maximum permissible upper limit and until a homogeneous mixture, without lumps, is obtained.
Mix complete packages for best results. 25 kg of SikaRep®-400 Extra powder mixed with 4.0 - 4.5 l of water, depending on the required consistency
Application - Application can be done either with a trowel or by hand for small repairs (concrete repairs, balcony decorations, edges on columns, etc.) on a properly prepared substrate
Wet the prepared substrate to saturation (recommended 2 hours before application of SikaRep 400 Extra).Keep the surface damp and do not allow it to dry
Before application, remove excess water, e.g. with a clean sponge
The surface should have a dark grey matt appearance, without gloss, and surface pores and craters should be free of water
First apply a smoothing coat, pressing the repair mortar firmly into the substrate to create a thin film and fill pores and holes in the substrate
Ensure that the entire surface to be repaired is covered by this smoothing layer. Then apply the product by applying good pressure and compacting it
If an adhesion bridge is required (especially where corrosion protection of reinforcing steel is required), ensure that the adhesion bridge layer is still tacky when applying the repair material (wet-on-wet application)
Refer to the System Layout for a compatible Sika product and the corresponding product property sheet for more information (e.g. Sika MonoTop 910 or SikaTop Armatec 110 EpoCem)
The layer thickness should be between 0.5 - 3.5 cm.Higher thicknesses can be achieved in successive layers when the mortar of each layer starts to set (non-sticky surface)
Do not finish the first coat before applying the second
The surface can be finished as required, using a trowel or plastering trowel while still wet or with a suitable sander once the mortar starts to set
Do not overwork the surface during the finishing phase
During applications in strong sunlight or wind, the mortar must be protected by suitable means so that it does not dry prematurely
Curing method - Protect the fresh mortar from premature drying by using appropriate preservation methods (for at least 24 hours), e.g. Sika Antisol or Sikafloor Proseal anti-evaporation curing membranes, once the surface water has evaporated
Removal of fresh residues from application tools and equipment can be carried out using water
Hardened and/or cured material can only be removed mechanically
Mixing ratio 4,0 - 4,5 lt water per 25 kg bag, depending on the desired workability
Layer thickness minimum 5 mm / maximum 35 mm
Ambient temperature +5°C minimum / +35°C maximum
Substrate temperature +5°C minimum / +35°C maximum
Working time ~ 45 minutes (at +20°C)
Consumption ~ 1.8 kg/m² per mm thickness, depending on substrate roughness