Fast Setting Class R4 Dry Sprayed Micro-Concrete for Large Volume Repairs Sikacrete-401 Rapid is a cement based, polymer modified, one-component, fast setting repair mortar containing silica fume and high range water-reducing agents, meeting the requirements of Class R4 of EN 1504-3. Formulated for machine applications using the dry spray process with set accelerators. - One component, ready to use.
- Non-silica aggregates, so no risk of alkali silica reactivity (ASR).
- Easy and quick to set up.
- Low rebound losses and dust formation during the spraying process.
- High build - layer thicknesses in one application overhead up to 100mm are possible without any additional mesh reinforcement.
- Rapid strength gain.
- Very low shrinkage.
- Overcoatable with Sika reprofiling / levelling / smoothing mortars and coatings.
- EN 1504-3 Class R4.
- Fast Initial and final set times.
- Ideal for limited possession work, or tidal applications.
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Usage - Large scale repairs of weathered, cracked, spalling and / or damaged structural concrete.
- Highway works.
- Bridges (columns, piers, sofits, beams, parapets, abutments, etc.).
- Marine structures (quays, piers, jetties, sea walls, docks, dry docks, marinas, offshore platforms, cofferdams, caissons, etc.).
- New construction.
- Lining and structural enhancement of mines and tunnels.
- Viaducts and culverts.
- Faςades and retaining walls.
- Embankment and rock stabilisation.
- Encasing steel sections.
- Buildings.
- Fire damaged structures.
- Cooling towers, chimneys and pylons.
- For exterior and interior use.
- In place of Class R1, R2 and R3 mortars.
- Particularly suited to limited possession and tidal works.
- Concrete restoration (Principle 3, Method 3.3 of EN 1504-9): Restoring the original concrete to the originally specified profile and function. Restoring the concrete structure by replacing part of it by spraying concrete or mortar.
- Structural strengthening (Principle 4, Method 4.4 of EN 1504-9): Increasing or restoring the structural load bearing capacity of an element of the concrete structure by adding mortar or concrete.
Advantages - One component, ready to use.
- Non-silica aggregates, so no risk of alkali silica reactivity (ASR).
- Easy and quick to set up.
- Low rebound losses and dust formation during the spraying process.
- High build - layer thicknesses in one application overhead up to 100mm are possible without any additional mesh reinforcement.
- Rapid strength gain.
- Very low shrinkage.
- Overcoatable with Sika reprofiling / levelling / smoothing mortars and coatings.
- EN 1504-3 Class R4.
- Fast Initial and final set times.
- Ideal for limited possession work, or tidal applications.
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Technical Information Compressive Strength | 1 Day | ~35 MPa | | 3 Days | ~45 MPa | | 7 Days | ~50 MPa | | 28 Days | ~60 MPa |
Modulus of Elasticity in Compression
Tensile adhesion strength
Coefficient of Thermal Expansion | 13.5 x 10-6 / oC | (EN 1770) |
Capillary Absorption | ~0.36 kg·m-2·h-0.5 | (EN 13057) |
Freeze Thaw De-Icing Salt Resistance | Good resistance with no visible changes after 50 cycles | (EN 13687-1) |
Reaction to Fire EuroClass A1
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Application Information Layer Thickness Minimum 15mm / Maximum 150mm (Vertical) and 100mm (Overhead) Ambient Air Temperature Minimum +3oC / Maximum +30oC Substrate Temperature Minimum +3oC / Maximum +30oC Final set time NOTE: Typical set time at 20oC. |
The above design is only a sample of the options available, for reference purposes only. Our policy of continuous improvement may result in a change of specifications without notice. If any discrepencies might be between the data sheet values and standards, we reserve the rights to make technical changes. Our company will not be held responsible, as all or any of pictures, drawings, weights and dimensions details or other elements in this document are only indicative and must not be considered contractual. Contact our sales team for other specifications or custom made products.
Contact our sales team for other specifications or custom made products.
