Sikafloor®-5 Chapdur (LK)

Natural mineral aggregates graded and mixed with cement, admixtures and pigments

12 months from date of production

The product must be stored in original, unopened and undamaged sealed packaging in dry conditions at temperatures between +10 °C and +30 °C

1.5 ± 0.1 kg/L at +27 °C

~1.70 mm wear loss                                                                                  (IS:1237)

≥ 70 N/mm2                                                                                    (IS:4031 Part 6)

2.5–3.0 mm at dosage of ~5.0 kg/m2

+5 °C min. / +35 °C max.

30% min. / 98% max.

+5 °C min. / +35 °C max.

Foot Traffic                                                                          Fully serviceable

~72 hours                                                                            ~7 days             

The above values are at substrate temperature of +27 °C and dependant upon the concrete reaching its design strength for serviceability and will be affected by changing ambient conditions, particularly temperature and relative humidity

Application                         Product                                          Consumption

Light duty                            Sikafloor®-5 Chapdur (LK)            3.5–4.0 kg/m2  

Medium duty                      Sikafloor®-5 Chapdur (LK)            4.5–5.0 kg/m2

Heavy duty                          Sikafloor®-5 Chapdur (LK)            5.5–6.0 kg/m2

▪ The concrete deliveries must be of consistent quality.

▪  A concrete slump in the range 75 to 110 mm will normally give best results.

▪ The slab must be of good quality concrete with a minimum water/cement ratio consistent with the production of a fully compacted slab.

▪ The compressive strength must be a minimum of 20 N/mm2.

▪ Use of SikaPlast® or Sika® Viscocrete® super plasticisers is advised to ensure the optimum quality of concrete and where fibers are used, their optimum dispersion within the mix.

▪ Air Entrained Concrete is not a suitable substrate for the application of dry shake hardeners.

Application time for dryshake products is influenced by every variable which affects the placing of concrete, and can therefore vary substantially, depending on the prevailing conditions.

Dependent on the conditions, remove the surface bleed water or allow it to evaporate. Sprinkle Sikafloor®-5 Chapdur (LK) onto the screed concrete evenly in 2 stages, first stage 60% and second stage 40%. Care must be taken to apply the product without creating ripples etc. in the concrete surface. The first application must be worked into the slab immediately followed by application of the second stage quantity of Sikafloor®-5 Chapdur (LK). Final finishing, closing pores and removing undulations can be achieved either by hand or powered trowel.

Please also note:

▪ Never add water to the surface where the dry shake has been applied.

▪ Sikafloor®-5 Chapdur (LK) results in the slab surface becoming stiff more quickly than usual. Careful trimming must take place along the edges where adjoining slabs are to be poured.

Periodical checking of the condition and development of the concrete will determine the correct time frame for each stage and sequence of application.

For mechanical application with automatic spreader and laser screed, the spreading can start almost immediately after the concrete has been levelled to allow for the hydration of the dryshake. Compaction with the trowel can start as soon as the weight of the power trowels is supported by the concrete.

For manual application, the dryshake must be spread once the concrete can be stepped on, without leaving a print deeper than 3–5 mm.

Cure Sikafloor®-5 Chapdur (LK) immediately after finishing using clean water. For chemical curing, please consult Sika Technical Service team.

To maintain the appearance of the floor after application, Sikafloor®-5 Chapdur (LK) must have all spillages removed immediately and must be regularly cleaned using rotary brush, mechanical scrubbers, scrubber dryer, high pressure washer, wash and vacuum techniques, etc., using suitable detergents and waxes.

LIMITATIONS

▪ The application of the dry shake powder must not be carried out in strong wind or in dry conditions.

▪ Variations in concrete characteristics such as water content and cement may lead to slight colour variations.

▪ Dry shake hardeners give a finish to concrete with some colour variation across the floor due to the natural variability of the concrete onto which they are applied.

▪ To ensure optimum colour consistency, it is essential that the floor laying operation is as clean and protected from the environment as possible.

▪ Colour variation during the drying out period is normal for this system and is to be expected.

▪ Every effort must be made to ensure an even application of Sikafloor®-5 Chapdur (LK). Correct timing and trowelling techniques are essential.

▪ At low relative humidities, efflorescence can appear on the surface.

▪ At high relative humidites, bleeding, slower curing and hardening can occur and extended finishing operations be required.

▪ For mechanical application, use automatic spreader in conjunction with a laser screed and spread Sikafloor®-5 Chapdur (LK) evenly onto the concrete immediately after screeding in one application.

▪ After application, do not expose such concrete surface to water and protect from rain or contaminants.