DARATARD® R1 is a liquid retarding admixture for concrete which temporarily delays the hydration of cement allowing the transportation and placing of concrete to be extended. It can be used with all types of concrete including sprayed concrete. DARATARD® R1 is formulated from carefully selected raw materials and is based on inorganic hydroxylated polymers.
DARATARD® R1 conforms to EN 934-2 and manufactured under controlled conditions to give a consistent product.
| DARATARD® R1 | ||
| Appearance | Pale Straw Liquid | |
| Specific Gravity (20°C) | 1.190 | |
| Alkali Content (eq.Na20) | 8.30 | |
| Chloride Content | Nil | |
| Air Entrainment | Nil | |
| Freezing Point | -9°C | |
DARATARD® R1 is supplied ready for use. It should be added to the concrete mixture 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 DARATARD® R1 can be used with most types of Portland cements. It is also effective in concrete containing fly ash or ground granulated blastfurnace slag. For use with special cements we recommend that you contact GCP Applied Technologies.
DARATARD® R1 should not be premixed with other admixtures. The performance of the product may be affected by the presence of other chemical admixtures. We recommend that all admixtures be added separately into the mix.
The effect of overdosing DARATARD® R1 is a function of the degree of overdose.
Overdosing DARATARD® R1 will generally produce a considerable increase in set retardation, without any significant increase in air entrainment. In cold weather this retardation will be further increased. If the increase is above the recommended dosage rates, care must be taken to allow for the retardation effect on stripping time and formwork pressure. In such cases, provided the concrete is properly cured, the ultimate strength will generally be higher than for normal concrete.
| Range | 300 ml -3000 ml per 100 kg cement |
| 0.30%-3.00% (v/w) by wt. of cement | |
| As a guide to trials an addition rate of 0.30-3.00% volume by weight of cement is suggested. | |
| For advice and assistance with trials we recommend that you consult GCP Applied Technologies. | |
DARATARD® R1 is a versatile material which gives benefits in a wide variety of applications. As with most products of this type, the level of effect of DARATARD® R1 is governed, within limits, by the quantity of product used and the specific nature of the concrete mix. The performance of DARATARD® R1 is best assessed after preliminary tests using the actual concrete materials to determine the optimum dosage and effect on both plastic and hardened concrete properties.
It is preferable that the DARATARD® R1 should be introduced into the mixer by automatic dispensing equipment. Equipment or advice on dispensing can be obtained from GCP Applied Technologies.
For further information on Health and Safety matters regarding this product we recommend that you consult the relevant Safety Data Sheet from GCP Applied Technologies. In line with general chemical handling precautions avoid contact with skin or eyes and protective gloves/goggles should be worn.
DARATARD® R1 is supplied in both 15 or 205 non returnable drums and 1,000 litre totes. Alternatively, bulk deliveries can be arranged. DARATARD® R1 should be stored away from extremes of temperature then protected from frost and should be kept out of direct sunlight in shaded storage at all times. If the product does freeze, it should be carefully thawed before mixing.
Storage Life in Manufacturer ‘s Drums:
12 months from date of manufacture.
Storage Life in Bulk Storage:
12 months from date of delivery.
Our Technical Service department of GCP Applied Technologies is available to assist you in the correct use of our performance chemicals.
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.
DARACEM 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.
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GCP Applied Technologies (UK) Ltd, Gate St, Dukinfield SK16 4RU.
This document is only current as of the last updated date stated below and is valid only for use in the United Kingdom. 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.uk. 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: 2022-11-24
https://gcpat.uk/en-gb/solutions/products/daratard-r1