Fortedur WET

Screeds for concrete floors

Fortedur WET is a uniquely designed dry powder mix combining graded hard aggregates, special cements, and compatible chemical ingredients that modify its mechanical properties and workability. The aggregates are mostly graded silica sand, sintered oxides, metallic aggregates. The quality of the dry mix, which is primarily determined by its abrasion resistance, is chosen according to the intensity of operations and the required load.

Floors modified in this fashion are found mainly in production and storage facilities, wholesale centers, logistic centers, or in parking areas.

They are especially good in places that require high resistance to abrasion and impact. Anywhere there is a need for a system with a durable, smooth and solid surface, which is not naturally slippery and has increased resistance to seepage from oil and grease.

Did you know?

Laying down concrete at low temperatures shows that the hydration of cement slows down at less than +5°C and practically stops below freezing point. It’s really about temperature. The lower it is, the longer it takes the concrete to cure. The temperature should be at least 5 degrees. Below the freezing point and the concrete starts to degrade.

Fortedur WET – Screed mix containing various types of cement, aggregates, fibers and chemical additives.

Product type1011102110261031
AggregateSiliceous sandsSintered oxide basedSintered oxide + metallicMetallic aggregates
Specific contents in the dry mixture66,42%55,42%27,71%+27,71%56,5%
Compression strength after 28 daysmin. 65 MPamin. 70 MPamin. 80 MPamin. 80 MPa
Böhm resistance5 cm3/50 cm22 cm3/50 cm21,5 cm3/50 cm31 cm3/50 cm2
BCA abrasion resistance0,05 mm0,035 mm0,025 mm0,02 mm
Consumption (kg/mm/m2)1,81,92,12,3
Layer thickness5-20 mm5-20 mm5-20 mm5-20 mm
Mixing water (l/25 kg)3,0-3,54,0-4,54,0-4,54,0-4,5
ColourBased on pricelistBased on pricelistBased on pricelistBased on pricelist

Colorfulness of insolence

Floors with dry mixes are primarily done in a natural gray color (the color of concrete). The mixed layer can be dyed to a selected color shade based on the requirements of the customer. The final color of the floor is always a combination of the color of the dry mix with shades of gray.

Color design:

Natural
Light grey
Dark grey
Red
Green
Yellow

Special additives in the composition

Anti-Shrinkage Agent

Anti-Shrinkage Agent is a special additive contained directly in the dry mix. It significantly reduces the formation of hairline cracks on the surface of the finished floor by providing a higher volume stability. You can therefore depend on an enhanced visual impression and improved mechanical properties of the final floor.

Silica Effect

Silica Effect – using very fine spherical particles in the dry component of the system helps reduce the porosity of the surface. This ensures lower seepage, higher frost and corrosion resistance, further increases the strength (in compression, bending tension, abrasion resistance) and improves the compactness of the entire floor system.

Abrasion-resistant micro-particles

Abrasion-resistant micro-particles – This additive made of super abrasion-resistant micro-particles, which become part of the uppermost top layer of the finished system, gives the floor a considerably higher surface durability.

CRACK STOP (CS)

CRACK STOP (CS) fibers. The product contains highly resistant zirconic fibers, which ensure three-dimensional (omni-directional) reinforcement of the material during the aging process and subsequently help to increase resistance to high local loads.

Synergies of products

To ensure the maximum efficiency of the floor system, we have added not only exceptional ingredients to the product that you won’t find in any other product of similar format, but we have also supported the functional dependability of the mutual synergies of the Fortedur powder mix and from the special Fortecoat 1425 or 1426 (water-based) curing coat.

It allows you to maximize the curing and finish of the final layer of your cement floor.

Advantages of the Fortedur WET system

Extra-long life of the floor in comparison with conventional concrete
High productivity and ease of installation
High resistance to operating loads
Increased impact resistance
Increased resistance against the seepage of aggressive substances (oils, solvents, etc.)
Controls the formation of dust and slipperiness of the surface
Various colors available

Disadvantages of the Fortedur WET system

Requires high-quality and expert application
Copies the plane of the concrete slab
Inconsistencies in color may develop in choosing color variations

Application to concrete

Evenly apply the cement-based dry mix to the surface of the concrete slab. In the event the concrete floor requires renovation, we recommend proceeding with the application in accordance with the method “Application for dry concrete”. In the opposite case, for new floors, we recommend the procedure “Application for wet concrete”.

Applying a wet mix to wet concrete

A highly durable floor finish is the result of the final treatment of a freshly laid concrete slab, which is part of a monolith. This finish is created by applying a dry mix containing special types of cement, aggregates and chemical additives.

This is a modern way of increasing the mechanical and aesthetic properties of the surface of concrete floors by spreading a suspended mixture on a drying, mostly even and compact surface to the prescribed thickness. This method is called “wet-on-wet”. The surface is then smoothed using rotary trowels according to the gradual hardening of the surface. The result is a monolithic floor structure that has superior abrasion resistance, excellent impact resistance, high compressive strength, a uniform color and dust-free surface.

How does the installation

Applying a wet mixture to dry concrete

In the event a wear layer is being prepared for concrete floors that already have high operating loads, it is useful to apply the Fortedur system to extend the life of the floor, to increase its durability and limit the dust arising from the original concrete substrate.

Prior to the actual application, it is necessary to rid the concrete surface of any loose parts, dirt, and where the issue is the smoothness of the surface or local unevenness, roughen and even out the surface (milling). The prepared surface must be saturated with water as intensively as possible. It’s necessary to prevent dry areas from forming or the creation of puddles. Fortedur 1091 is applied to the soaked surface, followed by a layer of Fortedur Wet using the “wet to dry” method, where the dry screed mix is continuously mixed with the required amount of water or in a mixer with forced circulation, and Fortedur Wet is evenly spread with a squeegee on the surface of the concrete slab. After the screed solidifies, the surface of the screed is smoothed using rotary disk trowels. The surface is then mechanically smoothed with the rotary machine using combination and final trowels, which ensures a high degree of the final physical modification.

Recommendations for application

  • Concrete floors with skim coats can only be done under the right climatic conditions.
  • Surface and outside temperature should be between +5 to +20°C and a relative humidity of 50-90%.
  • The working area must be void of drafts, direct sunlight on the surface and water running on the floor.
  • A load-bearing concrete slab must be made of high-quality concrete

How does the installation

Selected references