KingMix 675SP®
High range water reducing superplasticiser for rheoplastic concrete.
SpecWorld has the Spec Pack, CSI specification and drawings for registered specifiers.
Overview
KingMix 675SP is formulated from synthetic polymers designed to give concrete rheoplastic properties. Rheoplastic concrete is a fluid concrete with a slump of at least 200 mm that flows easily without segregating, at the same water/cement ratio as a 25 mm slump concrete made without admixture.
KingMix 675SP considerably improves the properties of both fresh and hardened concrete. It is chloride-free.
Where to use
- Microsilica concrete.
- Mass concrete pours.
- Ready-mixed concrete.
- Concrete transported over long distances.
- Pumped concrete.
- Casting in hot climates.
Why use it
- Lower thermal peaks.
- High workability for longer periods.
- Lower pumping pressure.
- Delayed setting with longer workability.
- Higher ultimate strengths.
- Lower permeability.
- Better durability.
Compatibility
KingMix 675SP is compatible with all cements and with most air-entraining agents that meet ASTM standards. Where the concrete must withstand freeze-thaw cycles, use KingMix 675SP together with an air-entraining agent.
Technical properties
| Colour | Dark brown liquid |
|---|---|
| Specific gravity | 1.16 @ 25°C |
| Chloride content | Chloride-free to EN 934 |
| Freezing point | 0°C |
Standards and approvals
EN 934-2: Tables 3.1, 3.2, 11.1 and 11.2.
ASTM C494: Types A, B, D, F and G.
How to use
Method of use
Dosage
Find the optimum dosage by trial mixes. As a starting point: 0.8 - 2.0 litre/100 kg of total cementitious material in normal concrete, and 1.5 - 3.0 litre/100 kg of total cementitious material in high-performance microsilica concrete. Depending on the mix requirements, higher dosages can be used without adverse effects on the concrete. For advice, consult KingKrete's Technical Services Department.
Dispensing
KingMix 675SP is a ready-to-use liquid, dispensed into the concrete together with the mixing water. The plasticising effect and the water reduction are greater when it is added after 50 - 70% of the mixing water. Do not add it to dry aggregate or cement. Automatic dispensers are available.
Workability
Rheoplastic concrete made with KingMix 675SP stays workable for more than 3 hours at +20°C. The loss of workability depends on the temperature, the type of cement, the aggregates, the method of transport and the initial workability. Cure the concrete properly, particularly in hot and dry climates.
Coverage, packaging and storage
Packaging
KingMix 675SP is available in 25 litre pails, 210 litre drums and in bulk.
Storage
Store at temperatures above +5°C, under cover, out of direct sunlight and protected from extremes of temperature. If the product has frozen, thaw it and agitate until it is completely reconstituted.
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
KingMix 675SP is not a fire or health hazard. Wash down spillages immediately with cold water. For further information, refer to the Safety Data Sheet.