Sika MonoTop®-3260 Grid
Cementitious Fibre Reinforced Mortar for the Sika® Carbodur® Grid 'M' (Masonry) System
Sika MonoTop®-3260 Grid is a one-part, cementitious fibre reinforced surface / finishing mortar. It is designed to be used in combination with the Sika® CarboDur®-300 Grid as part of the Sika® CarboDur® Grid System, which provides an efficient solution to consolidate and strengthen masonry.
- Good adhesion to brick, stone and cohesive porous substrates (excluding plaster, gypsum, etc.).
- Sulphate and sea water resistant.
- Applied up to 40 mm thick in one layer on vertical and horizontal applications.
- Non-sag overhead at maximum thickness.
- Good workability.
- Hand and machine application (wet spray technique).
- Ready to mix with water.
Usage
Sika MonoTop®-3260 Grid may only be used by experienced and trained professionals. A Component of the Sika® CarboDur® Grid System designed to:- Reinforce masonry in civil engineering structures (e.g. aqueducts, sewage works, water tanks, etc.) or residential buildings.
- Retain masonry structures in the case of cyclic load and postpone the risk of collapse in case of earthquakes.
- Distribute stresses generated by movement of the structure to avoid cracks and detachment of the mortar.
- Improve the connection between masonry panels and reinforced concrete frames.
- Patch repair, repair bed joints on brick, stone masonry, block masonry and masonry curtain walls.
Advantages
- Good adhesion to brick, stone and cohesive porous substrates (excluding plaster, gypsum, etc.).
- Sulphate and sea water resistant.
- Applied up to 40 mm thick in one layer on vertical and horizontal applications.
- Non-sag overhead at maximum thickness.
- Good workability.
- Hand and machine application (wet spray technique).
- Ready to mix with water.
Packaging
25 kg bags.
Colour
Grey powder.
Product Details
APPROVALS / STANDARDS
- CE Marking and Declaration of Performance to EN 1504-3 - Concrete repair product for structural repair.
- CE marking and Declaration of Performance to EN 1504-2 - Surface protection systems for concrete.
- CE marking and Declaration of Performance to EN 998-1 - Specification for mortar for masonry.
Chemical Base
Sulphate resistant cement, selected aggregates, synthetic fibres and special additives.
Shelf Life
12 months from date of production.
Storage Conditions
Product must be stored in original, unopened and undamaged packaging in dry conditions at temperatures between +5 °C and +35 °C. Always refer to packaging.
Maximum Grain Size
Dmax: 2 mm
Soluble Chloride Ion Content
| ≤ 0,05 % | (EN 1015-17) |
System Structure
| Sika MonoTop®-3260 Grid | Levelling and embedding layer |
| Sika® CarboDur®-300 Grid | Reinforcing grid |
| Sika MonoTop®-3260 Grid | Finishing layer |
Compressive Strength
| 1 day | ~ 20 MPa |
| 28 days | ~ 70 MPa |
Modulus of Elasticity in Compression
| > 40 GPa | (EN 13412) |
Flexural Strength
| 1 day | ~3.3 MPa |
| 28 days | ~7,5 MPa |
Tensile adhesion strength
| ≥ 2 MPa | (EN 1542) |
Shrinkage
| Shrinkage ~600 μm/m (+20 °C / 65 % relative humidity at 28 days) | (EN 12617-4) |
Restrained Shrinkage / Expansion
| ≥ 2.0 MPa | (EN 12617-4) |
Thermal Compatibility
| ≥ 2.0 MPa (Part 1- Freeze-Thaw) | (EN 13687-1) |
Capillary Absorption
| w = 0,1 kg/(m²h0.5) | (EN 13057) |
| w < 0,05 kg/(m²h0.5) | (EN 1062-3) |
Water Penetration under Pressure
No ingress through the System with 50 mm layer thickness
Water Penetration under Negative Pressure
No ingress through the System with 50 mm layer thickness
Diffusion Resistance to Water Vapour
| µH2O ≈ 220 | (EN ISO 7783) |
Lap Shear Strength
| µCO2 ≈ 21000 | (EN 1062-6) |
Carbonation Resistance
| dk ≤ control concrete (MC(0.45)) | (EN 13295) |
Application
Mixing Ratio
~2,6 L to 2,8 L of water for 25 kg of powder
Fresh mortar density
~2,2 kg/l
Layer Thickness
| Horizontal | minimum 10 mm / maximum 40 mm per application |
| Vertical | minimum 10 mm / maximum 40 mm per application |
| Overhead | minimum 10 mm / maximum 25 mm per application |
Do not exceed a maximum layer thickness of 60 mm in two application steps in the system with the embedded Sika® CarboDur®-300 Grid.
Ambient Air Temperature
+5 °C minimum / +35 °C maximum
Substrate Temperature
+5 °C minimum / +35 °C maximum
Pot Life
~40 minutes at +20 °C
Consumption
~2,0 kg/m2/mm of Powder
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.
Yield
25 kg of powder yields ~13 litres of mortar
EQUIPMENT
Substrate preparation equipment
- Mechanical handheld tools.
- High / ultra-high-pressure water blasting equipment.
Mixing equipment
Suitable mixing container.
- Small quantities - low speed (< 500 rpm) electric hand drill mixer.
- Large quantities or machine application - suitable forced action mixer.
Application equipment
- Hand applied – Plasterers hawk and 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 (stainless steel, steel, wooden or PVC).
- Sponge.
MIXING
Hand applied or wet spray application
- Pour the minimum recommended clean water quantity into a mixing container / equipment.
- While stirring slowly, add the powder to the water.
- Mix thoroughly for at least for 3 minutes adding additional water if necessary, to the maximum specified amount.
- Adjust to the required consistency to achieve a smooth consistent mix.
- Check the consistency after every mix.
APPLICATION
Strictly follow installation procedures as defined in method statements, application manuals and working instructions, which must always be adjusted to the actual site conditions.
Mortar
The final pre-wetted surface must achieve a dark matt appearance (saturated surface dry).
To prevent sagging or slumping of ‘built up’ mortar layers. Allow each layer to slightly harden before applying subsequent layers 'wet on wet'.
Manual application
- Thoroughly pre-wet the prepared substrate (2 hours recommended) before application.
- Keep the surface wet and do not allow to dry.
- Remove excess water from within the surface pores and cavities (e.g. with a clean sponge).
- Make a scratch coat using the mortar.
- Apply the scratch coat over the complete substrate surface to form a thin layer to fill surface pores or cavities.
- Apply the repair mortar onto the scratch coat ‘wet on wet’ at the minimum and maximum layer thicknesses without the formation of voids.
Sprayed application - wet spray
- Thoroughly pre-wet the prepared substrate (2 hours recommended) before application.
- Keep the surface wet and do not allow to dry.
- Remove excess water from within the surface pores and cavities (e.g. with a clean sponge).
- Place the wet mixed Sika MonoTop®-3260 Grid into the spraying equipment.
- Spray the mortar onto the pre-wetted substrate between the minimum and maximum layer thicknesses without the formation of voids.
Grid embedment
- Apply the first layer of Sika® MonoTop®-3260 Grid mortar to the prepared substrate.
- Embed Sika MonoTop®-3260 Grid into the 1st wet and levelled layer of mortar.
- While the first layer is still wet, apply a 2nd layer of mortar to completely cover the Sika MonoTop®-3260 Grid.
Surface finishing
- Finish the surface of the 2nd layer of mortar to a smooth finish using a stainless steel, steel, PVC or wooden trowel as soon as the mortar has started to harden.
CURING TREATMENT
Protect fresh mortar once is finished immediately from premature drying using an appropriate curing method (e.g. curing compound, moist geotextile membrane, polyethylene sheet, etc.).
Curing compounds must not be used when they could adversely affect subsequently applied products and systems.
CLEANING OF TOOLS
Clean all tools and application equipment with water immediately after use. Hardened material can only be mechanically removed.