Emulsion KR2

Product Name: EMULSION KR2

Description

Emulsion KR2 is an innovative admixture for pressed concrete. Incorporating it into pressed concrete virtually eliminates water permeability and unsightly efflorescence. It enhances the intrinsic quality of pressed concrete products by reducing damage caused by weathering‑related water uptake and efflorescence.

Recommended Uses

Use Emulsion KR2 as a water‑repellent admixture in the manufacture of pressed concrete products, including load‑bearing blocks, decorative blocks, coloured blocks, and blocks for retaining walls and basements. Add it to concrete pavers or other pressed concrete masonry as required. Do not use Emulsion Kr2 in aerated concrete masonry or wet‑mix concrete products.

Key Features

• Reduces water absorption and efflorescence by over 80%.
• Remains permanently bonded to the substrate and cannot be washed out.
• Does not leave an oily residue on the masonry substrate.
• Easy to use in existing processes.
• Water resistance can be varied by changing the rate of addition.
• Water-based technology with no hazardous material emitted during use.

As masonry materials vary, it is always recommended that a test must be carried out prior to application to find out the suitability of this product for the purpose.

Use Instructions

It is important that the applicator perform trials before application.

Dosage

The rate of addition depends on the specific mix design and the level of water repellency required. The usual dosage rate is about 0.5 litre of Emulsion KR2 per tonne (1000kg) of dry mix ingredients.

Addition

For a typical mix containing 1000 kg of dry ingredients, incorporate 0.5 litre of Emulsion KR2 into the mix using the following procedure:

•  Thoroughly mix all the concrete dry ingredients (1000kg) in a batch mixer.
•  Stir or mix Emulsion KR2 before use.
•  Measure out 0.5 litre of Emulsion KR2 and dilute it with 5 litres of clean water.
•  Spray this diluted emulsion into the dry mix while blending.
•  Blend the mix thoroughly while adding clean water to attain the desired consistency.
• The mix can be processed as usual.

If your process is substantially different to that described above, please do not hesitate to contact the manufacturer or the sales agent for assistance.

Performance Tests

1. Reduction in Water Absorption

The pressed concrete substrate used for testing contained 18% cement and 82% graded sand and aggregates with Emulsion KR2 at a dosage rate of 0.5 lt/tonne. In comparison, commercial oleate and stearate water‑repellent admixtures were used as references. The test substrates were covered with plastic for 24 hours under ambient conditions and then cured for 28 days before testing. Next, sponge capillary water absorption was conducted. Figure 1 showed the test results.Emulsion KR2 performed far better than the reference and significantly outperformed substrates treated with oleate and stearate.

2. Controlling Efflorescence

The efflorescence test was conducted by laying test substrates on a wet sponge placed in a solution containing 10% sodium sulphate. The top surface of the substrate was visually monitored for occurrence of efflorescence for 7 days. Table 1 shows that Emulsion Kr2 virtually eliminated efflorescence during the test period:

Typical Data

• Appearance: Milky white liquid with slight odour
• Solids content: 50% by weight
• Specific Gravity: ca. 0.945 gm/ml
• pH value: 7-8
• Solubility in water: Miscible
• VOC content: Nil
• Flash point: >61oC

Important Note

As conditions vary, onduct a pilot trial to determine the suitability of this product for its intended purpose.

Handling & Storage

Emulsion KR2 is non‑hazardous. Nevertheless, follow good industrial hygiene practices when handling. Store the product in closed containers in a cool, dry place away from fire sources. The shelf life is 12 months in a sealed container when stored below 25 °C.

Packaging

Emulsion KR2 is available in 20 and 200 litre plastic drums or 1,000 litre plastic bulky bins. Other size containers are available on request.