Water Reducers - Sika® Plastocrete®-161

WATER REDUCING ADMIXTURE

Sika® Plastocrete®-161 is a lignin polymer-type water-reducing admixture. Sika® Plastocrete®-161 meets the requirements of ASTM C-494, Types A, B and D admixtures.

Sika® Plastocrete®-161 water reducing admixture provides an economical and highly effective means of reducing the amount of mixing water required to produce concrete of a certain slump by acting as a dispersant for the cement particles in the mix. Through this dispersing action more of the surface area of the cement particles is available for early hydration. The more cement particles hydrated by contact with the mixing water, the greater the compressive strength of the concrete. Sika® Plastocrete®-161 is formulated as a Type A water reducer to allow up to 10 % water reduction and maximize the benefits of increased hydration in both the hardened and plastic states.

• Reduced water content required to achieve desired slump, increases compressive and flexural strengths and allows the use of more economical mixes.
• Improved paste quality makes concrete easier to pump and finish.
• Consistent normal setting times throughout the recommended dosage.
• Lower water cement ratios provide decreased permeability and increased durability.
• Sika® Plastocrete®-161 does not contain intentionally added chlorides and will not initiate nor promote the corrosion of steel in the concrete.

Usage

Sika® Plastocrete®-161 is recommended for use in all applications where high quality concrete with superior workability is required.

Advantages

Sika® Plastocrete®-161 water reducing admixture provides an economical and highly effective means of reducing the amount of mixing water required to produce concrete of a certain slump by acting as a dispersant for the cement particles in the mix. Through this dispersing action more of the surface area of the cement particles is available for early hydration. The more cement particles hydrated by contact with the mixing water, the greater the compressive strength of the concrete. Sika® Plastocrete®-161 is formulated as a Type A water reducer to allow up to 10 % water reduction and maximize the benefits of increased hydration in both the hardened and plastic states.

• Reduced water content required to achieve desired slump, increases compressive and flexural strengths and allows the use of more economical mixes.
• Improved paste quality makes concrete easier to pump and finish.
• Consistent normal setting times throughout the recommended dosage.
• Lower water cement ratios provide decreased permeability and increased durability.
• Sika® Plastocrete®-161 does not contain intentionally added chlorides and will not initiate nor promote the corrosion of steel in the concrete.

Packaging

Sika® Plastocrete®-161 is supplied in 55 gallon (208 liter) drums and bulk delivery.

Color

Dark Brown Liquid

Product Details

Product Information

Shelf Life

Shelf life when stored in dry warehouse conditions between 50 °F and 80 °F (10-27 °C) is one year.

Storage Conditions

Sika® Plastocrete®-161 should be stored at above 40 °F (5 °C). If frozen, thaw and agitate thoroughly to return to normal state before use.

Specific gravity

Approx. 1.14

Application

Application Information

Mixing

Sika® Plastocrete®-161 is added at the concrete plant. Measure required quantity manually or by automated dispenser. Add into the water line at the batch plant or to the mixer at the end of the batching cycle.

Combination with other Admixtures: Sika® Plastocrete®-161 works effectively as a single admixture or in combination with other admixtures in the Sika System. When air entrained concrete is specified, Sika recommends the use of Sika air entraining admixtures. When used in combination with other admixtures, care must be taken to dispense each admixture separately into the concrete. Do not mix with dry cement.

Consumption

Recommended Dosage

Dosage rates will vary depending on the material used, ambient conditions and the requirements of a specific project. For general concreting applications, Sika recommends a dosage rate between 2-5 fl. oz. / 100 lbs. (130-325 ml / 100 kg) of cementitious materials for normal setting characteristics. Dosage rates of 5-8 fl. oz. / 100 lbs. (325-520 ml / 100 kg) of cementitious materials are recommended for applications where higher water reduction is needed as well as extended workability and prolonged setting times.

Dosage rates outside the recommended range may be used where specialized materials such as microsilica are specified, extreme ambient conditions are encountered or unusual project conditions require special consideration.

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