WRDA® 24
Mid-Range Concrete Plasticiser
Product Description
WRDA® 24 is a liquid based concrete plasticiser which is used to improve the workability of cement based mixes and to provide for effective slump retention of concrete when manufactured and placed under high ambient temperature conditions.
WRDA® 24 can also be used as a water reducing agent, exhibiting moderate retarding properties when used in concrete.
WRDA® 24 is a multifunctional product, performing as a normal plasticiser / water reducing agent at low dosage levels, whilst at moderate addition rates, medium to high slump concrete can be produced. Alternatively at high dosage rates, large water reductions can be made or extremely high workabilities can be achieved.
It is formulated from selected raw materials and is manufactured under controlled conditions to give a consistent product.
It is based on an aqueous solution of modified organic polymers and meets the requirements of ASTM C-494 Type D and BS EN 934-2.
Advantages
- Effective plasticising action
- Extends the placement time of concrete even at high ambient temperatures.
- Excellent slump retention properties
- WRDA® 24 improves surface finish of concrete. Multi-dosage function, universal application
- Harsh mixes can be improved in both the plastic and hardened state using WRDA® 24.
- Improved permeability by reducing capillary pores in the hardened matrix
- Allows lower w/c ratios to be used with moderate cement contents
Typical Properties
| Appearance | dark brown liquid |
| Specific Gravity | 1.20 at 20°C |
| Air Entrainment | Air content will normally be increased by 1% to 2%. |
| Chloride Content | Nil |
| Freezing Point | 0°C |
Method of Use
WRDA® 24 is supplied ready for use. It should be added to concrete mixes during the mixing process at the same time as the water.
It should not be added directly to the cement. No extension of normal mixing time is necessary.
Compatibility with Cements
WRDA® 24 can be used with all types of Portland, Pozzolanic and blast furnace cements. It can also be used in mixes containing fly ash and silica fume.
Compatibility with other Admixtures
WRDA® 24 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: 0.5%–1.2% volume by weight of cement
The performance of WRDA® 24 is best assessed after preliminary tests on site, suing the actual concrete materials under consideration to determine optimal effect on properties such as ultimate compressive strength, early rate of gain of strength, etc., when these are of consequence.
WRDA® 24 should be used at an addition rate of 500 ml–1200 ml per 100 kg cement, the rate of addition will vary according to the nature of the constituent ingredients in the mix, however, dosage levels of 0.5%–0.75% by weight of cement should be used for normal plasticising effect and 0.75%–1.2% for high slump concrete.
Effects of Overdosing
Overdosing of WRDA® 24 will generally produce a considerable increase in workability and in certain circumstances an increase in air content may be noticeable.
Depending on the degree of overdosing the initial and final set of the concrete may be extended. The effects of overdosing with regards to initial and final set will also be exaggerating when fly ash, blast furnace slag or sulphate resisting cement is 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 can be supplied upon request.
Health and Safety
For further information see WRDA® 24 SDS (Safety Data Sheet) or consult GCP.
Packaging
WRDA® 24 is supplied in 210 litre, non-returnable containers.
Alternatively, 1000 litre IBCs or bulk deliveries can be arranged.
Storage
WRDA® 24 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
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
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