CONCRETE MIX Rapid Concrete

Application

CONCRETE MIX is a multifunctional quick-repair concrete suitable for concrete repair, repair and construction of pavements, roadways, concrete and machine foundations, formwork work and industrial floors. Can be used indoors and outdoors, even in wet areas.

Sustainable construction

The use of CONCRETE MIX 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

• Multifunctional for
• repair and new construction
• Horizontal and vertical
• Installation thickness 50 - 600 mm
• Faster hardening, loadable after approx. 1 hour after the end of solidification
• High strength
• Low stress
• Mineral
• durable
• Frost / de-icing salt resistant
• Sulphate resistant
• Chloride-free
• Resistant to many chemical attacks
• Excellent adhesion: direct, without adhesive bridge
• Aftertreatment only with water
• inside and outside
• High storage stability Processing

• Substrate: Clean the substrate, remove loose components, cement sludge, dust, acids, oil and grease. For a force-fit composite, the surface must be crack-free, even, rough and open-pored. The surface tensile strengths required in the regulations must be observed (1.0 N/mm2 must not be less than 1.0 N/mm2). Before processing, the substrate must be thoroughly pre-wetted. For highly absorbent surfaces, pre-wetting must be repeated several times*. A film of water or puddles should be avoided. * If necessary, an acrylate-based primer must be integrated.

• Processing: Sufficient personnel and suitable equipment or tools should be available before the work begins. Mix CONCRETE MIX with the specified amount of water for approx. 1 - 3 minutes in a suitable forced mixer or agitator, depending on the type of processing. To mix, first add water to the mixing container. Then add CONCRETE MIX while the mixer or stirring whisk is running. If less water is added, the strengths increase, whereby the maximum water addition must NOT be exceeded. CONCRETE MIX can be processed using conventional methods. Finishing should be done as soon as possible. CONCRETE MIX can be smoothed, grated or textured. Installation should be carried out in a complete layer, i.e. not in layers and as evenly as possible. No installation on frozen surfaces. During compaction, air voids should be prevented as far as possible. At temperatures > 20 °C, the processing time is shortened, at temperatures < 20 °C, the development of strength can be delayed. To extend the processing time, Rapid Set SET CONTROL (retardant) or Rapid Set FLOW CONTROL (plasticizer) for increased flowability, as well as the additive FAST to accelerate the setting time, can be added (see CONCRETE PHARMACY data sheet).

After-treatment

with water must be carried out immediately as soon as the surface has lost its damp shine and should be carried out repeatedly within one hour until the product has reached sufficient strength. If longer setting times occur, if temperatures are too low or if a retardant agent is used, longer post-treatment times may be necessary.

Delivery form

25 kg paper special packaging

Storage

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

Quality: C35/45

Grit: 0 - 8 mm

Colour: light grey

Common paving thicknesses (*in the 1st step depending on the selected consistency):

• Base: 50 - 600 mm

Setting time (based on DIN EN 196-3):

• Start of solidification: approx. 15 minutes
• End of solidification: approx. 35 minutes

Load-bearing: after approx. 60 minutes

Readiness for covering (Readiness for covering is independent of the thickness of the coating and is influenced by the ambient temperature and humidity. It is recommended to check the residual moisture by means of a suitable measurement.):

• Diffusion-open coverings (e.g. tiles, diffusion-open paints): after approx. 2 hours
• Diffusion-tight coverings (e.g. parquet, bitumen waterproofing): after approx. 16 hours

Compressive strength [N/mm2] (DIN EN 1015-11):

• after 60 minutes: > 19.0 N/mm2
• after 180 minutes: > 25.0 N/mm2
• after 7 days: > 35.0 N/mm2
• after 28 days: > 41.0 N/mm2

Flexural tensile strength [N/mm2] (DIN EN 1015-11):

• after 60 minutes: > 4.5 N/mm2
• after 180 minutes: > 6.5 N/mm2
• after 7 days: > 4.7 N/mm2
• after 28 days: > 7.0 N/mm2

Static modulus of elasticity [N/mm2] (DIN EN 13412):

• approx. 30,690 N/mm2, requirement fulfilled: yes

Sulphate resistance (test according to Wittekindt):

• Requirement fulfilled: yes

Frost / de-icing salt test (CDF) (BWA leaflet frost test):

• Requirement fulfilled: yes

Chloride ion content (DIN EN 1015-17):

• i. M. 0.009, Requirements met: yes

Temperature (processing, ambient and substrate temperature): ≥ 5 °C

Water addition:

• per 25 kg container: approx. 3.0 - 4.5 l

Material consumption:

• per m2 per mm: approx. 2.0 kg