Product Data Sheet Show all documents

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
Product Data Sheet Show all documents

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

Sustainability / Certifications / Approvals

APPROVALS / CERTIFICATES

JG/T 336-2011 Polymer Modified Cement Mortars for Concrete Structures Repair.
Product Information

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 information

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
Technical Information

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

7 d   (water : powder = 12%)

≥ 6 MPa

28 d   (water : powder = 12%)

≥ 10 MPa

(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

Application Information

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

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).
Application steps

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.

 

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