Cryston – IW+
Product Type Integral additive for concrete in dry powder form
Permeability reducing; chloride ion penetration & migration reducing admixture for concrete with crack bridging abilities till 500 microns.
All types of RCC structures
Most suitable for sub-structures and water retaining structures
Recommended for usage in high salinity and toxicity environments for increasing durability of RCC
- CRYSTON IW+ is to be added directly to the concrete mixer during batching.
- The product can be added at any time during the batching process. However, the addition time may affect plastic properties. Trial batches are recommended.
- If being batched into transit mixers, allow the product to thoroughly mix at medium/high speed for ten minutes prior to placing.
- If superplasticizers are to be used, they should be added normally after the addition of CRYSTON IW+ in the mix.
- Place and finish concrete in accordance with BIS/ACI guidelines
- CRYSTON IW+ improves flow, pumpability and placement properties of plastic concrete. Best results are achieved if the concrete mix is placed within 45 minutes from time of batching After 45 minutes, concrete may experience slump loss. Adjust slump with superplasticizer following manufacturers’ instructions. Do not add water to increase workability.
- CRYSTON IW+ can have minor effects on the initial and final setting times of the concrete. Adjust your finishing or stripping schedule accordingly.
- CRYSTON IW+ greatly improves internal curing and helps reduce drying shrinkage and crazing cracks. However, the product is not a replacement for proper curing procedures. Wet cure the concrete with a fog mist spray, sprinkler, or wet burlap for at least five days. Protect from rain, direct sunlight, or excessive wind.
Properties:
Reduction in water permeability
Standards:
As per DIN 1048
Results:
50% to 90% (depending on grade of concrete and control values)
Properties:
Increase in compressive strength
Standards:
As per IS 516
Results:
0% – 5%
Properties:
Drying shrinkage reduction
Standards:
As per DIN-157-08
Results:
Up to 40%
Dosage & Coverage
- Recommended dosage – 0.8 to 1.2 % by weight of binders for optimum performance.
- Maximum dosage ideally should not exceed 2.0 % by weight of binders
Shelf Life
Best before: 12 months when stored in dry conditions in original unopened packaging.
Packaging & Storage
- Storage above 35°C and humidity above 50% may reduce shelf life and product performance
- Standard Pack Size – 25 kgs lined HDPE bags
Health & Safety Precautions
Cementitious product hence contact with skin may cause irritation. Avoid skin contact by using protective gloves. If any contact occurs, wash thoroughly with soap and water.
Should not be inhaled. It is advisable to use protective respiratory mask of good quality while handling, pouring, and mixing the powder.
Avoid contact with eyes by using proper eye protection. If such contact occurs, rinse thoroughly with clean water. If any uneasiness persists, seek medical advice.
If mistakenly ingested, seek medical advice.
Refer to MSDS for further instructions and precautions