Sika MonoTop®-612

R3 concrete repair mortar

Sika MonoTop®-612 is a 1-component, fiber reinforced, containing silica fume, structural repair mortar meeting the requirements of class R3 of EN 1504-3.

  • Easy to apply
  • Ready to use, only need to add clean water
  • High mechanical resistances
  • Does not require a bonding primer even when manually applied
  • Suitable for hand and machine application
  • Excellent finishing
  • Non- corrosive
  • A1 fire rating
Product Data Sheet Show all documents

Overview

Usage

  • Thick layer repair mortar for vertical and overhead applications
  • Levelling of concrete and mortars surfaces before the application of coatings
  • Restoration of concrete elements
  • Filling joints between precast elements
  • Suitable for restoration work (Principle 3, method 3.1 and 3.3 of EN 1504-9). Repair of spalling and damaged concrete in buildings, bridges, infrastructure and superstructure works
 
  • Suitable for structural strengthening (principle 4, method 4.4 of EN 1504-9). Increasing the bearing capacity of the concrete structure by adding mortar
  • Suitable for preserving or restoring passivity (principle 7, method 7.1 and 7.2 of EN 1504-9). Increasing cover with additional mortar and replacing contaminated or carbonated concrete

Advantages

  • Easy to apply
  • Ready to use, only need to add clean water
  • High mechanical resistances
  • Does not require a bonding primer even when manually applied
  • Suitable for hand and machine application
  • Excellent finishing
  • Non- corrosive
  • A1 fire rating

Packaging

25 kg bags

Colour

Grey powder

Product Details

Composition

Cement, silica fume, polyamide fibers, selected aggregates and additives

Shelf life

12 months

Storage conditions

Store properly in undamaged original sealed packaging, in dry cool conditions

Maximum grain size

Dmax: 2.0 mm

Soluble chloride ion content

< 0.03%UNE EN 1015

System structure

Sika MonoTop®-612 is part of the range of Sika mortars coplying with the relevant part of European Standard EN 1504 and comprising of:

      

      

Bonding Primer/ Reinforcement Corrosion Protection

Sika Monotop®- 610

Normal Use

SikaTop® Armatec® 110 EpoCem®

Demanding Requirements

Repair Mortar
Sika MonoTop®-612Class R3 concrete repair hand and machine applied
Levelling Mortar
Sika Monotop®- 620Normal use

Compressive strength

1 Day

7 Days

28 Days

≥ 5 MPa

≥ 25 MPa

≥ 35 MPa

Modulus of elasticity in compression

~25 GPa

UNE EN 13412

Tensile strength in flexure

~8.0 MPa @ 28 days

UNE EN 1015-11

Tensile adhesion strength

≥1.0 MPa

UNE EN 1542

Restrained shrinkage / expansion

Restrained Shrinkage

~1.8 MPa

Restrained Expansion

~1.7 MPa

Capillary absorption

~0.2 kg. m-2.h-0.5

UNE EN 13057

Carbonation resistance

dk ≤ control concrete MC(0.45)

UNE EN 13295

Reaction to fire

Euro Class A1

Declared

Application

Mixing ratio

3.75 litres of water for 25 kg powder

Fresh mortar density

2.1 kg/lit

Layer thickness

minimum 5 mm / maximum 30 mm

Ambient air temperature

+5 °C minimum; +30 °C maximum

Substrate temperature

+5 °C minimum; +30 °C maximum

Pot Life

20 - 25 minutes

Consumption

This depends on the substrate roughness and thickness of layer applied.

As a guide ~18 kg of powder per cm thick per m²

MIXING

Sika MonoTop®-612 can be mixed with a low speed (<500 rpm) hand 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 3 minutes to the required consistency.

APPLICATION

Bonding Primer:

On a well prepared and roughened substrate a bonding primer is generally not required for this product. When a bonding primer is required, refer to the System Information above for compatible Sika products and refer to the relevant Product Data Sheet for instructions.

Sika MonoTop®-612 can be applied either manually using traditional techniques or mechanically using wet spray equipment. Thoroughly pre-wet the prepared substrate a recommended 2 hours before application. Keep the surface wet and do not allow to dry. Before application remove excess water e.g. with a clean sponge. The surface shall appear a dark matt appearance without glistening and surface pores and pits shall not contain water.

When manually applying the mortar first make a scratch coat by firmly scrapping the repair mortar over the substrate surface to form a thin layer and fill any pores or pits in the surface. The surface can be finished according to requirements using a float or with a relevant wooden or plastic float or damp sponge.

 

CURING TREATMENT

Protect the fresh mortar immediately from premature drying using an appropiate 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.

Documents