TRU Exposed Screed SP

Application

For the production of polished, decorative exposed screeds. For attractive, unique design of sales rooms, restaurants, foyers, museums, office buildings, schools, airports and all other representative spaces. Can be used indoors and outdoors, even in wet areas. TRU SP is a multifunctional product that can be individually and creatively designed in different colour variants. Due to the wide range of possibilities, we recommend on-site preliminary tests / sample areas.

Sustainable construction

The use of TRU SP reduces the CO2 footprint, increases energy and resource efficiency and conserves natural resources. The production of Rapid Set cement requires 30% less CO2 emissions than conventional Portland cement. For further information (e.g. LEED values), please contact the responsible KORODUR contact person.

Properties

• : polished salt-pepper look
,
• highly flowable
• , fast-setting, can be walked on after just 2 - 3 hours, can be sanded after 24 hours,
• high strength, after only 24 hours approx. 27 N/mm2, after 28 days approx. 44 N/mm2
,
• excellent clarity and gloss, highly polishable thanks to low polymer content and high density
• attractive and diverse. Use as a recoating and levelling layer. Diverse designs possible by adding colors and surcharges.
• 10 - 35 mm installation thickness
• mineral, physiological and ecologically harmless
• inside and outside, even in wet areas
• easy to clean

Processing

• Substrate: Prepare the substrate before installation, e.g. by shot blasting. The substrate must be load-bearing, firm, clean, dry, crack-free and free of loose parts, oils, greases or other adhesion-reducing impurities.

Surface tensile strength:

• without stress ≥ 1.0 N/mm2
• with stress and/or outdoors ≥ 1.5 N/mm2 The

requirements of DIN 18365 and DIN 18560 apply. Apply 2-component epoxy resin primer KORODUR TXPK to the prepared substrate, then sand generously with fire-dried quartz sand grain size 0.4 - 0.8 mm (see data sheet KORODUR TXPK).

• Mixing: The use of a suitable mixing technique, e.g. Hippo Mixer, Collomix-LevMix or mixing whisk with at least 650 rpm, is recommended. Do not use a mixing technique that introduces large amounts of air. Mix TRU SP with 3.8 - 4.3 l of clean water per container. Recommendation: First add 4 litres of water per container to the mixing tank, then add TRU SP while the mixer is running. The maximum water volume of 4.3 l must not be exceeded. The mixing time for an even, lump-free consistency is 3 - 5 minutes. The correct consistency is to be determined by determining the extent of the spread. We recommend using our "FLOW Kit" with appropriate instructions. TRU SP should be processed within 20 minutes. Keep the material temperature above 10 °C.

• Processing: TRU SP is applied to the prepared and primed substrate in a layer thickness of 10 mm or more. For heavily used soils, TRU SP should be applied in a layer thickness of 13 mm. In order to apply the material evenly, the use of a suitable squeegee is recommended. To remove air pockets, the still liquid surface is spiked with a plastic spiked roller. The entire surface must be protected from drying out too quickly, against wind, draughts, sunlight, etc. during application until the time it can be walked on. Air and material temperatures above 20 °C can accelerate the setting and strength behavior. The processing must be coordinated with this. It is advisable to use mixing water that is as cold as possible. Air and material temperatures below 20 °C can slow down the setting and strength behavior, especially with thinner layer thicknesses. We recommend warming up the material and/or mixing water.

Under

normal conditions at 20 °C, no post-treatment with water is required. In extremely dry, windy, hot or sunny conditions, post-treatment by means of a fine water mist on the sufficiently bound TRU surface is recommended.

Joints

All joints in hardened load-bearing concrete are to be taken over in the exposed screed layer. The exposed screed must be separated from rising components (walls, columns, etc.).

Grinding / polishing

TRU SP can be sanded as early as 24 hours after installation. TRU SP behaves similarly to concrete during grinding and polishing. The surfaces can be sanded to a high-gloss look. Grinding instructions can be provided upon request. Note: When sanding, up to 3 mm of the original paving thickness (depending on the desired look) is sanded down.

After

drying/walkability, suitable impregnation or care is recommended. This leads to an increase in chemical resistance, has a moisture- and dirt-repellent effect, and optimises the appearance. TRU SP thus becomes an easy-care, hard-wearing, attractive design floor.

Additional notes:

KORODUR design floors are cement screeds and are subject to building physics laws. Unfavourable construction site conditions and unforeseeable influences, e.g. temperature, draughts or sunlight, can lead to unplanned/undesirable phenomena (cracks/warping). In particular, cracks can be caused by a wide variety of causes and cannot be completely ruled out. Depending on the quality of the planning and execution, however, their number and extent can be greatly reduced. Cracks increase the authenticity of the floor and do not represent a reduction in design performance. KORODUR design floors are based on natural raw materials, so colour and structure fluctuations cannot be ruled out. Depending on the time of day, the incidence of light or the position of the viewer, a decorative exposed screed can appear different. See also BEB Worksheet Design Flooring 09/14.

Delivery form

27.2 kg Special paper packaging

Storage

Store in a dry place like cement. Shelf life approx. 12 months.

Quality: CT-C40-F10

Colour: natural, grey

Compressive strength [N/mm2] (after 28 days, measured on defined prisms according to DIN EN 13892-2):

• after 4 hours: approx. 13 N/mm2
• after 1 day: approx. 27 N/mm2
• after 28 days: approx. 44 N/mm2

bending tensile strength [ASTM C 307 Mod.]:

• after 24 hours approx. 6 N/mm2
• after 28 days approx. 13 N/mm2

adhesive tensile strength [ASTM C 348 Mod.]:

• after 7 days approx. 1.5 N/mm2
• after 28 days approx. 2.5 N/mm2

Processing time: approx. 20 minutes

Flow time: approx. 15 minutes

Temperature:

• ambient and substrate temperature: 10 - 30 °C
• Material temperature: 16 - 27 °C

Water addition: approx. 3.8 - 4.3 l/27.2 kg Container

Layer thickness: 10 - 35 mm

Material consumption (per m2 / per mm layer thickness): approx. 1.8 kg