Teknoser 300 Corundum Aggregate Surface Hardener
Construction Chemicals
Teknoser 300 Corundum Aggregate Surface Hardener
Product Description
It is a powdered 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
•For interior and exterior applications,
•Parking areas, garages, and ramps,
•Hangars and mechanical workshops,
•Underground passages and metro stations,
•Material storage areas, factories, exhibition halls, shopping centers with heavy pedestrian traffic, industrial facilities, fuel stations, railway stations, aircraft hangars, etc.,
•Areas where high abrasion resistance is required.
Properties and Advantages
•Applied to fresh concrete by manual or mechanical spreading.
•Provides resistance against dusting.
•Provides increased resistance to abrasion.
•Provides increased resistance to impact.
•Increases the durability of concrete.
•Increases the impermeability of concrete.
Application Details
Surface Quality: Proper preparation of the floor before applying TEKNOSER 300 is essential. Otherwise, cracking may occur in the concrete. If the floor to be treated is soil, it must be thoroughly compacted. For this purpose, after compacting the soil with rollers, it should be wetted with water tankers and rolled again. Soil tests, such as plate load tests, should be carried out to verify whether the ground is suitable for surface hardener application. These operations should be repeated until the soil is adequately compacted. Greenhouse plastic sheeting should be laid over the soil surface to prevent the concrete from losing its mixing water and to prevent cracking. If TEKNOSER 300 is to be applied to a screed concrete poured over existing concrete, the concrete surface should first be cleaned, and either floating or monolithic screed should be selected according to the project requirements. Where necessary, the surface should be roughened using suitable methods and the cement laitance should be removed. The existing concrete surface should be saturated with water at least one day before application, and standing water must be prevented. Application should be carried out on the saturated concrete surface. Before starting the application, planning should be carried out according to the project, panels should be formed in square sections, crack-control joints should be determined, and the screed should be poured accordingly. If box profiles are used when forming the panels, the mortar used for fixing them should be removed during screed placement. To ensure smooth screed edges, panel formwork should be cleaned before each application and TEKNOİL form-release agent should be used. The panel formwork used during screed placement must correspond to the designed screed height. Using formwork with a tongue-and-groove structure will prevent concrete under load from separating due to settlement at cold-joint sections.
The steel reinforcement specified in the project should be positioned using appropriate spacers. If reinforcement is laid directly on the existing slab without spacers, it will not have adequate adhesion to the screed concrete and will therefore be unable to resist tensile stresses in the concrete, potentially causing the panel to crack under load. If a single layer of reinforcement is used, it should be positioned at the center of the concrete thickness.
Steel reinforcement must not extend beyond the panel boundaries. If welded wire mesh is used, the mesh sheets must be overlapped. Cold joints and crack-control joints should be formed to control deformation and displacement occurring in the reinforced concrete slab under load without causing cracks in the concrete. To ensure that movement at these joints occurs only horizontally and in the intended direction, joint reinforcement should extend beyond the reinforced panel and be tied to the reinforcement of the panel. Plastic pipes or hoses should be placed over the sections of joint reinforcement extending beyond the panel, and the adjacent panel should then be formed and its concrete poured accordingly. This application prevents vertical and longitudinal movement of the cold joints during panel movement.
Application Notes / Limitations
•To achieve the expected performance from the product, the timing of the power troweling operation must be determined precisely.
•The timing of surface hardener application varies depending on the quality and type of concrete, as well as weather and ambient conditions. Application proceeds faster in hot weather and more slowly in cold weather. The setting stages of the concrete must be carefully monitored during application.
•The product may cause skin irritation. Protective gloves and goggles should be worn. A protective cream may also be applied to the hands before starting work. In case of contact with the eyes, rinse immediately with lukewarm water and seek medical attention.
•Avoid application in windy or extremely cold or hot weather conditions.
•When relative humidity falls below 40%, efflorescence may occur depending on the type of cement used in the concrete.
•Joint cutting should be carried out as soon as possible, preferably on the day after application. If cutting is delayed beyond 3 days, the concrete will have gained strength, making cutting more difficult, and concrete cracks may become visible on the surface.
•For TEKNOSER 300 application, concrete panels, power trowels, spreading and screeding equipment for special applications, and a polyurethane sealant gun are required.
•The application time for surface hardeners is affected by every variable influencing concrete placement and therefore varies according to the prevailing conditions.
•For mechanical application using an automatic spreader and laser screed, spreading can begin immediately after the concrete has been distributed to allow the surface hardener to become sufficiently wetted.
•Power troweling can begin once the concrete can support the weight of the ride-on power trowel.
•For manual application, the surface hardener should be spread once the concrete no longer retains fingerprints deeper than 3-5 mm.
•Periodic monitoring of the condition and development of the concrete ensures that correct decisions can be made regarding the stages and sequence of application.
•Surface hardener application should not be carried out under very windy or dry conditions.
•Concrete in which part of the cement has been replaced with fly ash should not be used, as it tends to be more sticky and has lower workability.
•Changes in concrete properties, such as water and cement content, may cause slight color differences.
•Surface hardeners may exhibit color variations depending on the natural variations of the concrete to which they are applied.
•To ensure color consistency and continuity, floor placement should be carried out as cleanly as possible and protected from environmental influences.
•Color variations during the drying process are normal and expected. Each operation should ensure proper TEKNOSER 300 application.
•Correct timing and power troweling techniques are essential.
•Immediately after application, while the product has not yet hardened, equipment should be washed with water and hands should be cleaned with warm water and soap.