Teknoser 300 Corundum Aggregate Surface Hardener

Construction Chemicals

Product Description
A powder surface hardener applied to fresh concrete surfaces, consisting of cement, corundum and similar hard aggregates, chemical additives,
special coloring pigments and polymer additives.

Areas of Use

• Indoors and outdoors,
• In parking lots, garages and ramps,
• In hangars and mechanical workshops,
• In underground passages, metro stations,
• In material warehouses, factories, fairgrounds, shopping malls with heavy human traffic,
industrial structures, gas stations, stations, aircraft hangars, etc. places,
• It is applied in places where high abrasion resistance is required.

Features and Advantages

• It is used by sprinkling on fresh concrete by hand or machine.
• It provides resistance against dusting.
• It is more resistant to abrasion.
• It is more resistant to impacts.
• It increases the durability of concrete.
• It increases the impermeability of concrete.

Application Details
Surface Quality: It is very important that the ground is prepared before applying TEKNOSER 300. Otherwise, cracks will occur in the concrete.
If the ground to be applied is soil; It should be compacted very well. For this, the ground
should be compressed with rollers, wetted with waterers and passed over with a roller again.
Ground tests such as layer tests should be performed to check whether the surface hardener can be applied.
These processes should be repeated until the ground is well compacted. In order for the concrete not to lose its sap and to prevent cracks
from forming, greenhouse nylon is laid on the soil surface. If screed concrete is poured on the existing concrete and TEKNOSER 300 ground hardener
is to be applied, floating or monolithic screed application
should be selected according to the project needs after the concrete surface is cleaned. The surface should be roughened with various methods where necessary and the cement grout should be removed.
The existing concrete surface should be saturated with water at least one day before the application begins and free water should be prevented from remaining on the surface. The application should be done on a saturated concrete surface. Before starting the application, planning should be done according to the project, the slabs should be formed in a square shape, crack control joints should be determined and the screed should be poured according to these principles. If box profiles are to be used while forming the slabs, the mortar used for fixing should be removed while pouring the screed. The slab molds should be cleaned before each application and TEKNOIL mold release agent should be used so that the edges of the screed concrete are smooth. The slab molds used while pouring the screed concrete should be at the designed screed height. The molds to be used should have a tongue and groove structure, which will prevent the concrete under load from collapsing and separating from the cold joint sections.

The steel reinforcement to be used according to the project should be placed in place using the cover slip. If the reinforcement is laid on the existing floor
without using the cover slip, the reinforcement will not have any adhesion with the screed concrete,
will not be able to prevent the concrete tensile stresses and will cause the slab to crack under load. If a single layer of reinforcement is to be used
the reinforcement should be laid in the middle of the concrete thickness.

The iron reinforcement should not be extended beyond the slab boundaries. If the iron reinforcement is to be solved with mesh steel, the mesh steels
should be laid by overlapping each other. Cold and crack control joints should be formed in order to control the shape and location changes that will occur in the reinforced concrete slab under load without causing cracks in the concrete. In order for the movements in these joints to occur only horizontally and in the desired direction, the joint reinforcements should be removed from the anode where the reinforcement is laid and these reinforcements should be connected to the irons of the formed anode. Plastic pipes or hoses should be passed to the parts of the joint reinforcements outside the anode to form another anode and the concrete of the other anode should be poured in this way. This application will prevent the vertical and longitudinal movements of the cold joints during the movement of the anodes.

Application Notes / Limitations

• In order to obtain performance from the product, the finishing application time must be determined very well.
• Surface hardener application is done with timings that vary according to the quality and type of the concrete to be applied, weather and environmental conditions. In hot weather, the application speed increases, and in cold weather, the application speed decreases.
During application, attention should be paid to the setting stages of the concrete.
• The product may irritate the skin. Protective gloves or goggles should be used. Protective cream can also be applied to the hands before starting work. In case of contact of the mortar with the eyes, the eyes should be washed immediately with warm water and a doctor should be consulted.
• Application should be avoided in windy, extremely cold and hot weather.
• In cases where the relative humidity falls below 40%, efflorescence may occur in the concrete depending on the type of cement used.
• Joint cutting should be done as soon as possible, the day after application. If cut after 3 days, concrete
will reach its strength, cutting will be difficult and concrete cracks will be seen on the surface.
• For TEKNOSER 300 application, concrete slabs, tray finishers, special applications for spreading and leveling equipment,
polyurethane mastic gun are required.
• Application time for surface hardeners is affected by every variable that affects the settling of the concrete and therefore
actually varies according to the prevailing conditions.
• In mechanical application with automatic sprayer and laser screed spreader, the spreading process can start immediately after the concrete is spread to allow the surface hardener to get wet.
• Compaction with trowel can start when the weight of the helicopter trowels is supported by the concrete.
• In manual application, the surface hardener does not leave fingerprints more than 3-5 mm should be sprinkled after a certain period of time.
• Periodic checking of the situation and concrete development ensures that the right decision is made about the application stages and order.
• Surface hardener application should not be done in very windy or dry conditions.
• Since concretes in which a portion of the cement is replaced with fly ash are more sticky and have lower workability, they should not be used.
• Changes in concrete properties such as water and cement content may cause slight color differences.
• Surface hardeners may cause color differences depending on the natural variations of the applied concrete.
• In order to ensure color consistency and continuity, the floor placement process should be done as cleanly and protected from the environment as possible.
• Color differences are normal and expected during the drying process. Each process must provide a proper
TEKNOSER 300 application.
• Correct timing and polishing techniques are essential.
• Immediately after application, before it hardens, equipment should be washed with water and hands should be washed with clean warm water and soap