Integral Watertight Admixtures - Sika® Watertight Concrete Powder
Permeability Reducing Admixture
Sika® Watertight Concrete Powder is a combined water resisting and HRWR/Superplasticizing admixture used to enhance the workability and reduce the water permeability of concrete. When added to concrete, the HRWR component in the admixture allows for the reduction in the water-cementitious ratio and reduces the large capillary pores in the concrete - the pore blocking component blocks the remaining small capillary pores by forming a hydrophobic layer within the pores. Sika® Watertight Concrete Powder meets requirements of ASTM C 494 Type F, ASTM C 494 Type S and is ANSI/NSF 61 certified and in ANSI.
- Reduces water absorption
- Reduces water penetration
Usage
Sika® Watertight Concrete Powder has been specifically formulated to produce high quality watertight concrete.
- Water retaining structures
- Below ground structures
- Swimming pools
- Lift pits
- Tunnels
To improve concrete’s resistance to water permeability, it is recommended that along with the use of Sika® Watertight Concrete Powder, the concrete should have a minimum cementitious content of 590 lbs/cyd and a maximum water/cementitious ratio of 0.42.
Advantages
- Reduces water absorption
- Reduces water penetration
Packaging
Sika® Watertight Concrete Powder is available in card board boxes, each box contains ten 2.95 lb. (1.34 kg) water soluble bags of Sika® Watertight Concrete Powder.
Color
White Powder
Product Details
Product Information
Shelf LifeShelf life of unopened packaging when stored in dry warehouse conditions between 40 °F and 80 °F (5-27 °C) is 2 years.
Storage ConditionsSika® Watertight Concrete Powder should be stored at above 40 °F (5 °C). Protect from direct sunlight.
Application
Application Information
MixingForced action and truck mixers should be free from all contaminants prior to the batching of concrete containing Sika® Watertight Concrete Powder.
- Sika® Watertight Concrete Powder should be added to the mixer at the recommended dose (1 bag per cu.yd. prior to the batching of concrete).
- Batched concrete mix constituents should be subsequently batched on to the Sika® Watertight Concrete Powder.
- Additional mixing water should then be dispensed to bring the concrete to the desired consistency.
- On completion of the batching procedure the concrete load should be mixed in the truck mixer/agitator on full revolutions for a minimum of 5 minutes to ensure that the optimum consistency has been achieved.
- The w/c ratio and consistency control is the responsibility of the concrete producer.
Laboratory trials are recommended to evaluate and confirm the actual water reduction.
Combination with Other Admixtures: Sika® Watertight Concrete Powder is compatible with other Sika admixtures. All admixtures should be added separately to the concrete mix.
Combination with Pozzolanic Materials: Sika® Watertight Concrete Powder can be successfully used in mix designs utilizing pozzolanic materials such as silica fume, fly ash and GGBFS.
Concrete Mix Design: Depending on the mix design, water reductions typically between 10-16 % can be achieved. Laboratory trials are always recommended to evaluate and confirm actual water reduction. Should the addition of a HRWR/Superplasticizer be required, it is recommended that a Sika® ViscoCrete® HRWR/Superplasticizer be selected.
Note: Results may vary with different materials, temperature conditions and testing practices.
Consumption
Recommended DosageDosage of Sika® Watertight Concrete Powder is 2.95 lbs. per cu. yd. of concrete. In the event of part loads less than 1 cu. yd., it is recommended that a 1 cu. yd. dose (2.95 lbs. per cu. yd.) of Sika® Watertight Concrete Powder is used.
See More
See Less