Sika MonoTop®-3020 ZA

Complies with the general requirements of EN 1504-3: Class R3.

Sulphate resistant cement, selected aggregates, additives and polymers

12 months from date of production

Product must be stored in original, unopened and undamaged sealed packaging in dry conditions at temperatures between +5 °C and +35 °C. Always refer to packaging.

D_max: 0,5 mm

Reinforcement Corrosion Protection/ Bonding Primer*

Concrete Repair Mortar

• Sika MonoTop®-4012 ZA                                              

Pore Filler/ Smoothing Coat / Levelling Mortar

• Sika MonoTop®-3020 ZA

~11Gpa

~2,0 kg/l

+5 °C min. / +35 °C max.

~3,75 litres of water for 25 kg powder.

+5 °C min. / +35 °C max.

~50 minutes at +20 °C

~40 minutes at +20 °C

Minimum 24 hours at +20 °C

As a guide, depending on weather conditions overcoat 3 days after application (2 days curing + 1 day drying) with Sikagard® range of protective coatings. For other emulsion paints, refer to the relevant manufacturer’s data sheet/ documentation.

~1,7 kg/m²/mm

Consumption depends on the roughness and absorbency of the substrate.

This figure is theoretical and does not allow for any additional material due to surface porosity, surface profile, variations in level or wastage etc.

25 kg of powder yields approximately 14,37 litres of mortar

Select the most appropriate equipment required for the project:

SUBSTRATE PREPARATION EQUIPMENT

• Mechanical hand-held tools

• High or ultra-high pressure water blasting equipment

STEEL REINFORCEMENT EQUIPMENT

• Abrasive blast cleaning equipment

• High pressure water blasting equipment

MIXING EQUIPMENT

• Clean mixing containers

• Small quantities: low speed electric single or double paddle mixer (< 500 rpm).

• Large quantities: Forced action mixer

APPLICATION EQUIPMENT

• Hand applied: Plasterers hawk, trowel

• Wet Spray: All in one mixing and spraying machine or separate spraying machine and all associated ancillary equipment to suit application volumes

FINISHING EQUIPMENT

• Trowel (PVC or wooden)

• Sponge

Also refer to Site Handbook ‘Repair of Concrete Structures – Patch Repair and Spray Applications’

CONCRETE

1. Clean the substrate thoroughly so it is free from dust, loose material, surface contamination and material which reduces adhesion, prevents suction or wetting by the repair materials.
2. Remove delaminated, weak, damaged and deteriorated concrete and where necessary, sound concrete. Remove using mechanical hand-held tools, high or ultra-high-pressure water blasting equipment.
3. Remove sufficient concrete from around corroded reinforcement to allow cleaning, application of a corrosion protection coating (where required) and compaction of the concrete repair mortar.
4. Prepare repair surface areas in simple square or rectangular layouts to avoid shrinkage stress concentrations and cracking while the repair material cures. This can also avoid structural stress concentrations from thermal movement and loading during the service life.

STEEL REINFORCEMENT

1. Remove rust, scale, mortar, concrete, dust and other loose and deleterious material which reduces bond or contributes to corrosion.
2. Prepare surfaces to bright steel, Sa 2 (ISO 8501-1), using abrasive blast cleaning or high-pressure water blasting equipment.

1. Pour the minimum amount of water into a suitable clean mixing container or equipment.
2. Gradually add the powder to the water while stirring slowly.
3. Mix thoroughly for at least for 3 minutes, add additional water if necessary.
   • Note: Do not add more water than the maximum specified amount.
4. Adjust to the required consistency to achieve a smooth consistent mix.
5. Check the consistency after every mix.

IMPORTANT

Strictly follow installation procedures

Strictly follow installation procedures as defined in Method Statements, application manuals and working instructions which must always be adjusted to the actual site conditions.

IMPORTANT

Protect from frost

Protect freshly applied material from freezing and frost to prevent cracking.

IMPORTANT

Application in the direct sun or strong winds

Avoid application in direct sun, strong winds or both to reduce the risk of the Product cracking.

REINFORCEMENT CORROSION PROTECTION COATING

1. Where a reinforcement coating is required, apply to the whole exposed circumference Sika MonoTop®-1010 or SikaTop® Armatec®-110 EpoCem® (Refer to individual Product Data Sheets).

BONDING PRIMER

When a bonding primer is required to achieve the required adhesion values, use Sika MonoTop®-1010 or SikaTop® Armatec®-110 EpoCem® (Refer to individual Product Data Sheets).

Note: On a well prepared and roughened substrate or for a sprayed application, a bonding primer is generally not required.

REPAIR MORTAR MANUAL APPLICATION

IMPORTANT

Substrate pre-wetting

Insufficient substrate saturation prior to application will cause the mortar to not gain it's full mechanical properties.

1. Only apply the Product to stable, prepared substrates.
2. Thoroughly pre-wet the prepared substrate for a minimum of 2 hours before application.
3. Keep the surface wet and do not allow to dry.
4. The final pre-wetted surface must achieve a dark matt appearance (saturated surface dry).

IMPORTANT

Sagging or slumping of built up layers

Allow each layer to slightly harden and remain wet before applying subsequent layers.

1. Remove excess water from within the surface pores and cavities with a clean sponge.
2. Make a scratch coat using the repair mortar.
3. Apply the scratch coat over the complete substrate surface to form a thin layer to fill surface pores or cavities.
4. IMPORTANT Do not apply as a "feather edge".Apply the repair mortar onto the scratch coat ‘wet on wet’ between the minimum and maximum layer thicknesses without the formation of voids.

REPAIR MORTAR SPRAYED APPLICATION - WET SPRAY

IMPORTANT

Substrate pre-wetting

Insufficient substrate saturation prior to application will cause the mortar to not gain it's full mechanical properties.

1. Only apply the Product to stable, prepared substrates.
2. Thoroughly pre-wet the prepared substrate for a minimum of 2 hours before application.
3. Keep the surface wet and do not allow to dry.
4. The final pre-wetted surface must achieve a dark matt appearance (saturated surface dry).

IMPORTANT

Sagging or slumping of built up layers

Allow each layer to slightly harden and remain wet before applying subsequent layers.

1. Remove excess water from within the surface pores and cavities with a clean sponge.
2. Place the wet mixed repair mortar into the spraying equipment.
3. Spray the repair mortar onto the pre-wetted substrate between the minimum and maximum layer thicknesses without the formation of voids.

SURFACE FINISHING

IMPORTANT

Adding water during surface finishing

Do not add water during the surface finishing as this can cause discolouration and cracking.

1. Allow mortar to surface harden.
2. Surface finish to the required surface texture using a stainless steel, steel, PVC or wooden float.

• Protect fresh mortar immediately from premature drying using an appropriate curing method, such as curing compound, moist geotextile membrane or polythene sheet.

• Curing compounds must not be used when they could adversely affect subsequently applied products and systems.

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