Sika MonoTop®-412 NFG
Structural repair mortar with corrosion inhibitor
Sika MonoTop®-412 NFG is a 1-component, polymer modified, fibre reinforced, low shrinkage structural repair mortar with corrosion inhibitor meeting the requirement of class R4 of EN 1504-3.
- Polymer modified for increased durability
- Superior workability and finishing
- Suitable for hand and machine application
- Can be applied up to 20 mm thick per on overhead application layer
- Structural repair
- Sulphate resistant
- Very low shrinkage behaviour
- Contains corrosion inhibitor
- Low permeability
- A1 fire rating
Usage
Restoration work. Repair of spalling and damaged concrete buildings, bridges, infrastructure and superstructure works (3.1 and 3.3 of EN 1504-9). Preserving or restoring passivity. Increasing cover with additional mortar and replacing contaminated or carbonated concrete (7.1 and 7.2 of EN 1504-9).Advantages
- Polymer modified for increased durability
- Superior workability and finishing
- Suitable for hand and machine application
- Can be applied up to 20 mm thick per on overhead application layer
- Structural repair
- Sulphate resistant
- Very low shrinkage behaviour
- Contains corrosion inhibitor
- Low permeability
- A1 fire rating
Packaging
25 kg bags
Colour
Grey powder
Product Details
APPROVALS / CERTIFICATES
JG/T 336-2011 Polymer Modified Cement Mortars for Concrete Structures Repair.
Composition
Cement, corrosion inhibitor,selected aggregates and polymer modified.
Shelf life
9 months from the date of production.
Storage conditions
Store properly in undamaged original sealed packaging, in dry cool conditions.
Maximum grain size
Dmax: 2.5 mm
Density
~2.2 kg/l
Soluble chloride ion content
| ≤ 0.05% | (EN 1504-3) |
System structure
Sika MonoTop®-412 NFG is part of the range of Sika mortars complying with the relevant part of European Standard EN 1504 and comprising of:
| Bonding Primer / Reinforcement Corrosion Protection | |
| Sika MonoTop®-910 N | Normal Use |
| SikaTop® Armatec® 110 EpoCem® | Demanding requirements |
| Repair Mortar | |
| Sika MonoTop®-412 NFG | Structural repair mortar (Class R4) |
| Fairing coat | |
| Sika MonoTop®-723 N | Pore sealer and levelling mortar |
Compressive strength
Class R4
| 7 d (water : powder = 12%) | ≥ 35 MPa |
| 28 d (water : powder = 12%) | ≥ 50 MPa |
Bonding strength*
| No treatment | 28 d | ≥ 1.5 MPa |
| Water immersion | 28 d | ≥ 1.0 MPa |
| Freeze-thaw 25 time | 28 d | ≥ 1.0 MPa |
*) with primer Sika® MonoTop®-910 N
Modulus of elasticity in compression
| ≥ 20 GPa | (EN 1504-3) |
Tensile strength in flexure
| (JG/T 336-2011) |
Shrinkage
| ≤ 0.1 (water : powder = 12%) | (JG/T 336-2011) |
Thermal compatibility
| ≥ 2.0 MPa (Part 1: Freeze- Thaw) | (EN 1504-3) |
Capillary absorption
| ≤ 0.5 kg/(m2.h0.5) | (EN 1504-3) |
Chloride ion diffusion resistance
| ≤ 0,05% | (EN 1504-3) |
Carbonation resistance
| Pass | (EN 1504-3) |
Reaction to fire
| Euro class A1 | (EN 1504-3) |
Application
Mixing ratio
3.0 to 3.5 litres of water for 25 kg powder
Layer thickness
Vertical: 8 mm (minimum) to 50 mm (maximum)
Overhead: 8 mm (minimum) to 20 mm (maximum)
Ambient air temperature
+5 °C min. /+30 °C max.
Substrate temperature
+5 °C min. /+30 °C max.
Pot Life
~ 30 minutes at +23°C
Initial set time
| 45 min (water : powder = 12%) | (JG/T 336-2011) |
Final set time
| ≤ 9h (water : powder = 12%) | (JG/T 336-2011) |
Consumption
1 bag yields approximately 13.3 litres of mortar.
| Sika MonoTop®-412 NFG | 1.89 kg | 25.0 kg | 1890 kg |
| Water | 0.23 kg | 3 kg | 230 kg |
| Mortar mix | 1.00 L | 13.3 L | 1.00 m3 |
For a 1mm layer of mortar approx. 1.89 kg powder/m2 is required (actual consumption will vary depending on the substrate roughness).
MIXING
Sika MonoTop®-412 NFG can be mixed with a low speed (400 ~ 600 rpm) electric drill mixer or for machine application, using a force action mixer 2 to 3 bags or more at once depending the type and size of mixer.
Pour the recommended water in a suitable mixing container. While stirring slowly, add the powder to the water and mix thoroughly at least for 5 minutes to the required consistency.
APPLICATION
Sika MonoTop®-412 NFG can be applied either manually using traditional techniques or mechanically using wet spray equipment.
When a bonding primer is required, ensure it is still tacky when the repair material is pressed on (wet on wet technique). When applied manually, pressed the repair mortar with a trowel, pressing it well on the substrate.
Finishing for both hand and machine application, can be done with the relevant roughcast as soon as the mortar has started to stiffen.
CURING TREATMENT
Protect the fresh mortar immediately from premature drying using an appropriate curing method e.g. curing compound, moist geotextile membrane, polythene sheet etc.
CLEANING OF EQUIPMENT
Clean all tools and application equipment with water immediately after use. Hardened material can only be mechanically removed.