KingAdd 5AW®
Antiwash admixture system for underwater concrete.
SpecWorld has the Spec Pack, CSI specification and drawings for registered specifiers.
Overview
KingAdd 5AW is concrete admixture formulated from selected polymers specially designed to produce more cohesive grouting and concrete mixes. It surrounds the cement particles by gel action to minimise the washout in the underwater cementitioius applications.
Where to use
- Underwater concrete applications.
- Foundations and piles where high water table occurs.
- To produce cohesive concrete mixes.
- Fluid grouting that may have subject to washout.
Why use it
- Higher concrete strength in the underwater concrete applications by significant minimizing the washout of cement particles.
- Improve workability by reducing placing and compaction problems.
- Minimizing segregation and bleeding problems by improving cohesion.
- More durable concrete as a result of reduction in permeability and lower water to cement ratio.
COMPATIBILITY
KingAdd 5AW can be used with all types of Portland cement and cement replacement materials.
KingAdd 5AW is compatible with KINGKRETE concrete admixtures used in the same concrete mix. In case of other types of admixtures have to be used, contact KINGKRETE technical department for more advice.
Technical properties
Values @ 25°C
| Colour | Light brown liquid |
|---|---|
| Specific gravity | 1.04 ± 0.02 |
| Chloride contentBS 5075 | Nil |
| Air entrainment | Typically less than 2% additional air is entrained above control mix at normal dosages |
To check the percentage of washout reduction, normally a comparison test should be done between control concrete mix without using KingAdd 5AW admixture versus concrete mix using KingAdd 5AW, fill a perforated basket with concrete mix and drop it through the water for 3 to 5 times and measure the weight loss on each time.
Normally up to 90% of washout reduction can be achieved by using the KingAdd 5AW comparing with control mix.
How to use
Method of use
KingAdd 5AW should be added after adding all of materials of concrete mix and should allow for 30 seconds extra mixing time.
REDUCTION OF WASHOUT
KingAdd 5AW will minimize the washout of cement and fines particles in the mix significantly, also other factors will help to minimize the washout by making a mix design to get more cohesive mix like increasing the sand percentage over the coarse aggregates percentage.
Coverage, packaging and storage
Packaging
KingAdd 5AW is available in 25, 210 litre and bulks supply.
DOSAGE
The guidance dosage of KingAdd 5AW is 0.2 - 1.3 ltr/100 kg of cementitious materials in the mix, including GGBFS, PFA or micro-silica.
Representative trials should be conducted to determine the optimum dosage of KingAdd 5AW to meet the performance requirements by using the materials and conditions in actual use.
EFFECTS OF OVER DOSAGE
Over dosing of KingAdd 5AW will cause the following:
- Significant increase in retardation.
- Affecting the workability significantly.
Ultimate concrete strength will not be adversely affected unless of using a dosage of more than double of recommended dosage.
SETTING TIME
Although the setting time is dependent on the dosage of KingAdd 5AW, the following factors should be considered:
- Retardation is increased with lower levels of tri- calcium in the cement.
- Lower temperatures will delay the setting time.
- SRC cement gives higher retardation levels than ordinary cement.
- Using more than one type of admixture in the same concrete mix could affect the setting time.
- Retardation level is increased when cement replacement materials are used in the concrete mix.
Storage
Shelf life is 1 year when stored under cover, out of direct sunlight and protected from extremes of temperature.
Failure to comply with the recommended storage conditions may result in premature deterioration of the product or packaging. For specific storage advice consult KingKrete's Technical Services Department.
Health and safety
As with all chemical products, care should be taken during use and storage to avoid contact with eyes, mouth, skin and foodstuffs. Treat splashes to eyes and skin immediately. If accidentally ingested, seek medical attention. Reseal containers after use. Use in well ventilated areas and avoid inhalation.