Daravair® AE4 is a liquid air-entraining agent for use in all types of mortar and concrete mixes. It is particularly designed for use in the production of foamed concrete and for use with synthetic and naturally occurring lightweight aggregates, where the density of fine aggregate/cement paste is normally required to be similar to that of the aggregate. Daravair AE4 is formulated from carefully selected raw material and is manufactured under controlled conditions to give a consistent product. It is a blend of anionic surfactants.
Daravair AE4 is a pale, straw-coloured liquid intended for use as supplied. Daravair AE4 does not contain chlorides as an intentional component and it is non-corrosive.
One litre weighs approximately 1.03kg ± 0.02kg.
Daravair AE4 may be used whenever the purposeful entrainment of air is required by concrete specifications. It is particularly useful in mass concrete and in high-cement, low-slump paving mixes, which require efficient, effective air-entraining admixtures. Daravair AE4 should be added to concrete mixes or mortar mixes during the mixing process at the same time as the water or the aggregates. It should not be added directly to the cement or mortar.
Air is incorporated into the concrete by the mechanics of mixing and stabilised into millions of discrete, semi-microscopic bubbles in the presence of a specifically designed air-entraining admixture such as Daravair AE4. These air bubbles act much like flexible ball bearings increasing the workability of the concrete. This permits a reduction in mixing water with no loss of slump. Placeability is improved, and bleeding and segregation are minimised.
Through the purposeful entrainment of air, Daravair AE4 markedly increases the durability of concrete to all exposures - particularly to freezing and thawing. It has also demonstrated a remarkable ability to impart resistance to the action of frost and deicing salts as well as sulphates, sea and alkaline waters.
The performance of Daravair AE4 is best assessed after preliminary tests on site using the actual mix and the plant under consideration to determine the optimum dosage rates which will give the desired concrete properties.
For foamed concrete-mortar, a 5 - 7% solution of Daravair AE4 is usually added via a foam tube. The quantity of Daravair AE4 added will determine the resultant density of the concretemortar produced.
Hence the volume of aqueous solution added is proportional to the concrete-mortar density required. Conventional mixing equipment can be used to produce foamed, lightweight aggregate concrete.
As a guide to trials, an addition rate of 200mL of Daravair AE4 per 50kg cement should be evaluated.
The air content of air regularly checked, and because of the absorptive nature of most lightweight aggregates, a gravimetric determination is most suitable.
- Daravair AE4 will entrain air into types of concrete, even those with highly angular crushed aggregates.
- It can be used with all types of lightweight aggregates to produce very low-density concrete mixes.
- Daravair AE4 can be employed to entrain air in mixes containing high proportions of pulverised fuel ash.
- An aqueous solution of Daravair AE4 can be performed to give a very stable, foamed concrete.
Compatibility with Other Admixtures
Daravair AE4 is compatible in concrete with all known accelerating admixtures, water-reducing admixtures and water-reducing retarders. Each admixture should be added separately to the mix, and not premixed with other admixtures.
Effects of Overdosing
As with all air-entraining agents, Daravair AE4 in any given mix will proportionately reduce compressive strengths as the level of entrained air is increased. Overdosing Daravair AE4 will normally produce an increase in air content and workability, together with a loss in ultimate compressive strengths.
Please contact your local GCP representative for further information regarding the dispensing equipment for this product.
Packaging and Storage
Daravair AE4 is supplied in 205L drums and in 1,000L totes. Daravair AE4 should preferably be stored in sealed conventional containers protected from the elements. Daravair AE4 does not contain any flammable ingredients.
Health and Safety
See Daravair AE4 Material Safety Data Sheet or consult GCP Applied Technologies.
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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.
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GCP Applied Technologies Inc., 62 Whittemore Avenue, Cambridge, MA 02140, USA
This document is only current as of the last updated date stated below and is valid only for use in Thailand. 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.th.gcpat.com. 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: 2021-02-05