Sika® Chapdur IN
Sika® Chapdur IN is a one part, preblended, coloured mineral dry shake hardener for concrete comprising of cement, specially selected natural mineral aggregates, admixtures and pigments. Sika® Chapdur IN provides a extremely hard wearing and abrasion resistant topping for monolithic floors. When sprinkled and trowelled into fresh wet concrete floors, it forms a coloured, dense and wear resistant smooth surface.
- Ready to use
- Good wear resistance
- High impact resistance
- Cost effective surface hardener
- Makes floor dust proof
- Non metallic and rust free
- Easy to clean
- Increased resistance to oils and grease
- Quality assured factory blending
- Suppresses superficial fibres in concrete
Usage
Suitable for use in all cases where floors are subjected to severe mechanical wear and there is a need to apply special hard wearing surface coverings, such as:- Warehouses
- Factories
- Shopping malls
- Public areas
- Restaurants
- Museums
- Parking lots
- Garages and Service stations
Advantages
- Ready to use
- Good wear resistance
- High impact resistance
- Cost effective surface hardener
- Makes floor dust proof
- Non metallic and rust free
- Easy to clean
- Increased resistance to oils and grease
- Quality assured factory blending
- Suppresses superficial fibres in concrete
Packaging
30 kg bags
Colour
Natural concrete grey powder
Product Details
Composition
Natural mineral aggregates graded and mixed with cement, admixtures and pigments
Shelf life
12 months from date of production
Storage conditions
The product must be stored in original, unopened and undamaged sealed packaging in dry conditions at temperatures between +10°C and +30°C
Bulk density
1.5 ± 0.1 kg/L at +27°C
Abrasion resistance
~1.70 mm wear loss | ( IS:1237) |
Compressive strength
~70 N/mm2 | (IS:4031 Part 6) |
Application
Layer thickness
2.5 to 3.0 mm at dosage of ~ 5.0 kg/m2
Ambient air temperature
+5°C min. / +35°C max.
Relative air humidity
30% min. / 98% max.
Substrate temperature
+5°C min. / +35°C max.
Applied product ready for use
Foot Traffic | Fully serviceable |
~72 hours | ~7 days |
The above values are at substrate temperature of +27 °C and dependent upon the concrete reaching its design strength for serviceability and will be affected by changing ambient conditions, particularly temperature and relative humidity.
Consumption
Application | Product | Consumption |
Heavy duty | Sika® Chapdur (IN) | 5.5 to 6.0 kg/m2 |
Medium duty | Sika® Chapdur (IN) | 4.5 to 5.0 kg/m2 |
Light duty | Sika® Chapdur (IN) | 3.5 to 4.0 kg/m2 |
EQUIPMENT
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 dry shake. Compaction with the trowel can start as soon as the weight of the power trowels is supported by the concrete.
For manual application, the dry shake must be spread once the concrete can be stepped on, without leaving a print deeper than 3 - 5 mm.
SUBSTRATE QUALITY
- 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 Sikament® or Sika® Viscocrete® super plasticizers 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
Broad casting of Sika® Chapdur IN premix
The concrete slab is ready for the Sika® Chapdur IN cement coating when a thumb pressed hard onto the surface only leaves a print of about 3-5 mm depth. Sprinkle 60% of Sika® Chapdur IN onto the screed concrete evenly by hand or with suitable device.
Compaction
Wait until the Sika® Chapdur IN has been evenly moistened by the water in the concrete, Use a low rpm mechanical trowel, held perfectly flat.
Note : If parts of the surface come loose or if the laitance rises, this means the concrete is still too fresh.
Smoothing
As soon as the plasticity or initial set allows, perform preliminary smoothing with the same machine running at low speed but equipped with metal smoothing blades, set at minimum angle. Sprinkle remaining 40% of Sika® Chapdur IN onto the screed concrete evenly by hand or with suitable device and 2nd stage of compaction has to done.
Any final smoothing required should be performed later with the machine running at high speed.
Joints
Construction joints, expansion joints and floor joints should be saw-cut only after 24 hours. When the slab has hardened, the joints can be filled with the appropriate Sikaflex Sealant in accordance with the floor requirements.
CURING TREATMENT
Cure Sika® Chapdur IN immediately after finishing using clean water. For chemical curing, please consult Sika Technical Service team.
Joints:
After finishing operations and completing saw cuts, clean off any residual saw lubricant / slurry without delay. Joints can be filled with Sikaflex® PRO-3WF or any other appropriate Sikaflex® sealant in accordance with the floor design requirements.
CLEANING
To maintain the appearance of the floor after application, Sika® Chapdur IN 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.