WRDA® P8

Concrete Plasticiser

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Product Description

WRDA® P8 is an accelerating plasticiser, or water-reducing agent for concrete and mortar and is based on calcium chloride. It is particularly useful for obtaining high early strength in precast items such as blocks and lintels where no reinforcement is used, etc. especially under conditions of low ambient temperature. The plasticising ingredient of WRDA® P8 is fully soluble in the calcium chloride solution and no separation can occur even at low temperatures.

WRDA® P8 is formulated from carefully selected raw materials and is manufactured under controlled conditions to give consistent product. It is based on naturally derived materials dissolved in calcium chloride solution and meets the requirements of Type E of ASTM C-494 designation.

Advantages

  • WRDA® P8 imparts early and ultimate strengths to concrete enabling forms to be stripped sooner and blocks to quickly achieve high lifting strengths. This effect is particularly useful at low ambient temperatures.
  • The effective plasticising action of WRDA® P8 will give increased workability to most concrete mixes enabling easier placing.
  • Water reductions in the region of 10% can be made without adversely affecting the workability with a subsequent increase in strength, impermeability and durability.
  • WRDA® P8 offers an improvement over most other accelerating plasticisers in that it is a fully compatible system which will not ‘seed out’ a low temperatures which can lead to blockages of pipe lines and inconsistent results.

Typical Properties

WRDA® P8
Appearance pale yellow liquid
Specific Gravity 1.34 at 20°C
Air Entrainment Any additional air entrainment is slight and will rarely exceed 0.7%.
Chloride Content 34% approx. as calcium chloride
Freezing Point -7°C

Method of Use

WRDA® P8 is supplied ready for use. It should be added to concrete mixes during the mixing process, at the same time as the water or the aggregates. It should not be added directly to the cement. No extension of normal mixing time is necessary.

Compatibility with Cements

WRDA® P8 can be used with all types of Portland cement and those containing cement replacement materials.

Compatibility with other Admixtures

WRDA® P8 should not be premixed under any circumstances with other admixtures. While some admixtures can be usefully combined within the same mix the performance of this product may well be affected by the presence of other chemicals and we recommend that GCP Applied Technologies be contacted for advice in all such circumstances.

Addition Rates

Range: 1.68%–3.36% volume by weight of cement

The performance of WRDA® P8 is best assessed after preliminary tests on site using the actual concrete under consideration to determine the optimum dosage and the effect on properties such as ultimate compressive strength, early rates of strength and shrinkage when these are of consequence.

Warning:

Under no circumstances should additions be made at a higher level than the maximum dosage of 3360 ml WRDA® P8 per 100 kg cement because of possible deleterious effects of excessive calcium chloride.

Effects of Overdosing

Overdosing of WRDA® P8 will generally produce a considerable increase in workability and will shorten the setting and hardening process. Such overdosing is, however, to be avoided because the maximum addition rate of WRDA® P8 is equivalent to approximately 1.4% by weight of anhydrous calcium chloride based on the cement.

This is the level normally advised as being the maximum that should be used in cementitious compositions.

Pre-Stressed and Post-Tensioned

Concrete WRDA® P8 contains calcium chloride and should not under any circumstances be employed in concrete where pre-stressing or post-tensioning of reinforcement is to be used.

Dispensing

It is preferable that liquid admixtures for concrete should be introduced into a mixer by means of automatic dispensing equipment, details of which are available upon request.

Health and Safety

For further information see WRDA® P8 SDS (Safety Data Sheet) or consult GCP.

Packaging

WRDA® P8 is supplied in nominal 210 litre, non-returnable containers.

Storage

WRDA® P8 should be stored in original containers or suitable closed tanks, preferably out of direct sunlight and protected from extremes of temperature.

Storage Life in Manufacturer’s Drums:

12 months from the date of manufacture

Storage Life in Bulk Storage:

12 months from the date of delivery

Technical Service

The Technical Service Department of GCP is available to assist you in the correct and best use of our products. These resources and advice are at your disposal entirely without obligation. Please contact:

GCP

Emirates Chemicals LLC
Festival Tower, Suite 1701
Dubai Festival City
P.O. Box 5006
Dubai, United Arab Emirates
Tel: +971 4 2329901
Fax: +971 4 2329940
Email: meinfo@grace.com

    gcpat.ae | United Arab Emirates customer service: +971 4 5139560

    We hope the information here will be helpful. It is based on data and knowledge considered to be true and accurate, and is offered for consideration, investigation and verification by the user, but we do not warrant the results to be obtained. Please read all statements, recommendations, and suggestions in conjunction with our conditions of sale, which apply to all goods supplied by us. No statement, recommendation, or suggestion is intended for any use that would infringe any patent, copyright, or other third party right.

    WRDA is a trademark, which may be registered in the United States and/or other countries, of GCP Applied Technologies Inc. This trademark list has been compiled using available published information as of the publication date and may not accurately reflect current trademark ownership or status.

    © Copyright 2018 GCP Applied Technologies Inc. All rights reserved.


    GCP Applied Technologies Inc., 2325 Lakeview Parkway, Alpharetta, GA 30009, USA
    P. O. Box 5006, Office 2104, 21 Floor, The Exchange Tower, Opp. JW Marriott Marquis Hotel, Business Bay, Dubai – United Arab Emirates
    This document is only current as of the last updated date stated below and is valid only for use in the UAE. It is important that you always refer to the currently available information at the URL below to provide the most current product information at the time of use. Additional literature such as Contractor Manuals, Technical Bulletins, Detail Drawings and detailing recommendations and other relevant documents are also available on www.gcpat.ae. Information found on other websites must not be relied upon, as they may not be up-to-date or applicable to the conditions in your location and we do not accept any responsibility for their content. If there are any conflicts or if you need more information, please contact GCP Customer Service.

    Last Updated: 2022-11-18

    https://gcpat.ae/en-gb/solutions/products/wrda-p8