Product Data Sheet Show all documents
Sikacrete®-301 Premium

Sikacrete®-301 Premium

High Performance Class R4 Dry Sprayed Micro-Concrete for Large Volume Repairs

Sikacrete®-301 Premium (formerly SikaCem®-133 S Gunite) is a cement based, polymer modified, one-component repair micro-concrete containing silica fume and high range water-reducing agents, meeting the requirements of EN 1504-3 Class R4. Formulated for machine applications using the dry process without set accelerators, repairs may be profiled and trowel finished easily where necessary.

  • 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 150mm are possible without any additional mesh reinforcement.
  • Rapid strength gain without set accelerators.
  • Very low shrinkage.
  • Can be finished easily to a high standard.
  • Overcoatable with Sika® reprofiling / levelling / smoothing mortars and coatings. 
  • EN 1504-3 Class R4. 
  • Low resistivity - can be used with cathodic protection systems. 
  • Suitable for use in contact with potable water. 
Product Data Sheet Show all documents

Usage

  • Large volume repairs.
  • Highways 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.). 
  • Water facilities (reservoirs, dams, tanks, buildings, treatment works, etc.). 
  • Tunnels. 
  • Faςades. 
  • For exterior and interior use. 
  • In place of Class R1, R2 and R3 mortars. 
  • Low resistivity - can be used with cathodic protection systems. 
 

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 150mm are possible without any additional mesh reinforcement.
  • Rapid strength gain without set accelerators.
  • Very low shrinkage.
  • Can be finished easily to a high standard.
  • Overcoatable with Sika® reprofiling / levelling / smoothing mortars and coatings. 
  • EN 1504-3 Class R4. 
  • Low resistivity - can be used with cathodic protection systems. 
  • Suitable for use in contact with potable water. 

Packaging

25 kg bag

Product Details

Sustainability / Certifications / Approvals

APPROVALS / STANDARDS

  • Resistivity: Mott MacDonald Report No. 37423/DA/001.Rev A.
  • CE marking and declaration of performance based on EN 1504-3 Products and systems for the protection and repair of concrete structures — Structural and non-structural repair.
Product Information

Chemical Base

Portland cement, polymers, selected aggregates, silica fume and additives.

Shelf Life

6 months

Storage Conditions

Store properly in original unopened, sealed and undamaged packaging in dry and cool conditions. 

Maximum Grain Size

Dmax: 3.0 mm

Density

~2230 kg/m3 after 28 days

(BS EN 12390-7)

Soluble Chloride Ion Content

<0.007%
System information

System Structure

Layer

Product

Function

Bonding Primer / Reinforcement Corrosion Protection

Sika® MonoTop®-1010

Normal use

SikaTop® Armatec®-110 EpoCem®

Demanding requirements

Concrete Repair Mortar

Sikacrete®-301 Premium

High performance requirements

Levellling / Smoothing Mortar

Sika® MonoTop®-3020Normal use
Sikagard®-720 EpoCem®Demanding requirements
Technical Information

Compressive Strength

1 Day

~15 MPa

7 Days

~35 MPa

14 Days

~50 MPa

28 Days~60 MPa

Modulus of Elasticity in Compression

~23 GPa

(EN 13412)

Flexural Strength

28 Days

~10 MPa

Tensile Strength

~2.5 MPa

(EN 1542)

Shear Strength

µ = 60,000

Coefficient of Thermal Expansion

8 x 10-6 m/m oC

Electrical Resistivity

~14.4 kΩcm

Capillary Absorption

0.14 kg.m-2.h-0.5

(EN 13057)

Diffusion Resistance to Water Vapour

µ = 1,000

Chloride Ion Diffusion Resistance

600 – 700 x 10-15 m2/s

Freeze Thaw De-Icing Salt Resistance

106% - good resistance with no visible change after 400 cycles. 

NOTE: Determined in accordance with SN 640461 - Resistivity factor WFT-L. 

Application

Application Information

Fresh mortar density

~2.2 kg/l

Layer Thickness

10 mm minimum / 150 mm maximum

Ambient Air Temperature

+3°C minimum / +30°C maximum

Substrate Temperature

+3°C minimum / +30°C maximum
Consumption

Consumption

This depends on the substrate roughness and thickness of layer applied. As a guide, ~2.2 kg/m2/mm.
Application steps

MIXING

Sikacrete®-301 Premium is fed into the dry process spraying machine which should be of suitable size for the repair areas to reduce wastage and rebound. The amount of water added is controlled by the nozzleman at the nozzle and should be sufficient to prevent slump and dust. Rebound will be increased with unsuitably sized spraying machines, compressors, nozzle types, dry mixtures and thin layers.

APPLICATION

Reinforcement Corrosion Protection:

Where a reinforcement coating is required, the application of the repair mortar shall be applied when the the reinforcement coating has cured (at least 'finger nail hard'). Refer to the System Information above for compatible Sika® products and refer to the relevant Product Data Sheet for more detailed information about the reinforcement corrosion product. The sprayed repair mortar shall be placed onto the pre-wetted substrate between the minimum and maximum layer thicknesses without the formation of voids and loose rebound material. Where layers are to be built up, to prevent sagging or slumping, each layer should be allowed to stiffen before applying subsequent layers 'wet-on-wet'. When layers cannot be applied 'wet-on-wet', pre-wet the surface and allow to surface dry to a dark matt appearance.

Sikacrete®-301 Premium is finished by leaving ‘as shot’, or striking off with a straight edge and closing the surface with a wooden / plastic / steel float or damp sponge to achieve the desired surface texture. Reference shall be made to EN 1504-10 for specific requirements, the Code of Practice for sprayed concrete issued by the Concrete Society, and any other guidelines that are specific to the structure.

CURING TREATMENT

It is essential to cure the repair mortar immediately after application for a minimum of 3 days to ensure full cement hydration and to minimise cracking. Use polythene sheeting taped down at the edges, or another approved method. Curing compounds shall not be used when they adversely impact subsequently applied products and systems. Reference shall also be made to EN 1504-10 for specific requirements.

CLEANING OF TOOLS

Clean all tools and application equipment with water immediately after use. Hardened / cured material can only be mechanically removed.

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