NEODUR Hard Screed HE 40

Application

For the production of heavy-duty industrial floors, e.g. multi-storey car parks, industrial halls, assembly halls, aircraft hangars, workshops, high-bay warehouses and other industrial areas with the highest loads. For indoor and outdoor use.

Properties

• : highly wear-resistant even under the heaviest loads
,
• high surface tightness
• , resistant to petrol, mineral oil, solvents,
• lift-resistant
• , waterproof, suitable for wet rooms,
• non-slip, anti-slip,
• frost-resistant
,
• electrostatic, non-rechargeable
,
• chloride-free,
• physiologically and ecologically harmless
,
• pumpable
• Consistent quality through quality assurance in accordance with DIN EN 13813

Processing

fresh on fresh

• substrate: The load-bearing concrete must be produced at least as C 25/30 in accordance with DIN EN 206 (Attention: no use of air-void concrete!). Produce the surface in a height-appropriate manner within the tolerance limit according to DIN 18202. For intermediate post-treatment of the load-bearing concrete, we recommend KOROCURE (see data sheet). The fresh load-bearing concrete that has just been walked on is rubbed off with a plate smoothing machine.

• Processing: Mix NEODUR HE 40 with the specified amount of water for approx. 3 minutes, depending on the type of processing, and apply to the fresh, previously plated-off surface, pull off using gauges (round bars) using an aluminium straightener or vibrating plank and rub off in a timely manner using a plate smoothing machine to close the pores and smooth according to the required surface structure (leaf troweling machine) layer thickness 8 - 15 mm.

on hardened load-bearing concrete

• substrate: The load-bearing concrete (at least C 25/30, surface tensile strength ≥ 1.5 N/mm2) must be prepared, e.g. milling and shot blasting. For a force-fit composite, the surface must be crack-free, even, free of loose and crumbly components and ultra-fine mortar enrichments, as well as rough and open-pored. The requirements of DIN 18365 and DIN 18560 apply. The flatness should comply with DIN 18202, Table 3, Line 3. Thoroughly pre-wet load-bearing concrete one day before installation, avoid puddling. Apply KORODUR HB 5 adhesive bridge to the matt damp surface (see data sheet).

• Processing: NEODUR HE 40 is laid "fresh on fresh" in a layer thickness of 15 mm, analogous to processing.

Aftertreatment

Different temperatures influence the solidification or hardening process. NEODUR HE 40 must be protected from drying out too quickly in accordance with DIN EN 13670 / DIN 1045-3. For post-treatment of the NEODUR hard coating, we recommend the products KOROMINERAL CURE or KOROTEX (see data sheets). If subsequent surface treatment, coating or markings are planned, the post-treatment should only be carried out with film.

Joints

The joint grid must be specified by the planner. All joints in the hardened load-bearing concrete are to be taken over in the hard material layer. The hard screed must be separated from rising components (walls, columns, etc.).

Delivery form:

• 25 kg special paper packaging
,
• big bag
• , loose as silo goods (NEODUR HE 40)

Storage

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

Quality:

• NEODUR HE 40: CT-C40-F6-A6
• NEODUR HE 40/8: CT-C40-F7-A6

Grit:

• NEODUR HE 40: 0 - 5 mm
• NEODUR HE 40/8: 0 - 8 mm

Colour:

• all qualities cement grey

Grinding wear (wear resistance according to Böhme according to DIN EN 13892-3):

• all qualities: ≤ 5.0 cm3/50 cm2

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

• all qualities: C40

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

• NEODUR HE 40: F6
• NEODUR HE 40/8: F7

Temperature (processing, ambient and substrate temperature):

• all qualities: ≥ 5 °C

Water addition (all types):

• Screed quality C 35: approx. 3.5 l/25 kg container
• Screed quality C 45: approx. 3.0 l/25 kg container

Processing time (depending on ambient temperature):

• all qualities: approx. 2 - 3 hours

Layer thickness (laying fresh on fresh):

• NEODUR HE 40: 8 - 15 mm

Laying on hardened concrete:

• NEODUR HE 40: 10 - 35 mm
• NEODUR HE 40/8: up to 70 mm

Material consumption (per m² / per mm layer thickness):

• all qualities: approx. 2.1 kg