DBM® W
Plasticiser for Semi-Dry Mixes
Product Description
DBM® W is a liquid permeability reducing admixture for use in all types of mortar and concrete mixes. DBM W has particular applications in the cast stone and block making industries, where high aggregate/ cement ratios are normally used.
Typical Properties
| DBM W | |
|---|---|
| Appearance | amber coloured liquid |
| Specific Gravity | 1.04 at 20 °C |
| Sulphate Content | 0.50% as SO3 |
| Chloride Content | Nil |
| Freezing Point | -5 °C |
Advantages
- DBM W can be added by means of an automatic disperser.
- It can be used with grey or white Portland cement or with pigmented mixes to help prevent unsightly efflorescence and irregular leaching out of pigments.
- Precast units, blocks, bricks and other semi-dry concretes containing this type of permeability reducer, retain their original clean appearance when exposed to the elements for considerable periods.
- The durability of concrete finishes is increase because the penetration of rain and moisture is greatly reduced, giving improved resistance to frost damage.
- Aggregate mottling can be prevented in most mixes.
-
The reduction in permeability obtained with DBM W is long lasting.
Method of Use
DBM W 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
DBM W can be used with all types of Portland cement including sulphate resisting and cement replacement materials.
Compatibility with other Admixtures
DBM W 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: 1.0%–2.0% volume by weight of cement
The performance of DBM W is best assessed after preliminary tests on site using the actual mix under consideration. It has been found to be effective in a wide range of concretes, e.g. in open textured blocks containing grey or white cement, various mixes into which a synthetic colour is added and in concrete of normal density.
It is difficult to specify a precise level of addition for optimum results to be achieved because of the range of applications. Furthermore, the degree of reduction in surface permeability required can be achieved by varying the dosage level, which typically lies between 1000 ml–2000 ml DBM W per 100 kg cement.
Effects of Overdosing
Serious overdosing of DBM W will generally produce an increase in workability and cohesion of the mix. In cold weather this may be accompanied by retardation of setting.
Dispensing
It is preferable that liquid admixtures for concrete should be introduced into the mixer by means of automatic dispensing equipment. Details are available upon request.
Health and Safety
For further information see DBM® W SDS (Safety Data Sheet) or consult GCP.
Packaging
DBM W is supplied in nominal 210 litre free, non-returnable containers.
Alternatively, 1000 litre IBCs or bulk deliveries can be arranged.
Storage
DBM W 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.uk | United Kingdom customer service: +44 (0) 1480 478421
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.
DBM 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.
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/dbm-w