DARAFILL® LS additive produces flowable fill or engineered Controlled Low Strength Material (CLSM)* that is highly flowable, volume stable and excavatable in the future. By developing a stable air matrix in the CLSM mixture, DARAFILL® LS improves fluidity and requires no compaction equipment.
DARAFILL® LS is available packaged in one litre bags to treat one cubic meter of concrete or in larger packaging for dosing through a liquid dispenser.
* CLSM may be referred to as “Flowable Fill”, “Controlled Density Fill” or “Cement Stabilised Sand” in different geographical areas.
The use of DARAFILL® LS produces a low water content CLSM that is primarily used to improve flowability, lower densities, eliminate segregation and settlement, and control strength development in applications where future excavation is required.
DARAFILL® LS is designed to be used with Portland cement, fly ash and ground granulated blastfurnace slag. CLSM produced using DARAFILL® LS is a cost-effective alternative to soil backfill.
DARAFILL® LS is designed for CLSM mixtures and is not recommended for use in conventional concrete. DARAFILL® LS offers the following benefits:
The addition of DARAFILL® LS generates stable air contents of 15 to 25% and significantly reduces mix water requirements by as much as 50%, producing concretes with a final density of 1500 – 1800 kg/m3. When used as recommended, DARAFILL® LS enhances plastic and
hardened properties of CLSM accordingly:
Store DARAFILL® LS for 2 years in original unopened packaging, above freezing, away from heat sources and out of direct sunlight. Addition rates are typically one litre DARAFILL® LS to dose 1.0 m3 of CLSM. DARAFILL® LS is supplied in pouches containing one litre. The
contents of DARAFILL® LS pouches are added to the CLSM load typically at one litre per m3. DARAFILL® LS should be added directly into the mixer after the CLSM load is batched. For optimisation of freight volumes, add DARAFILL® LS at the job site. CLSM with DARAFILL® LS reaches optimum consistency when the mixture reaches a creamy, flowing appearance. For central mix operations, add the contents of DARAFILL® LS pouches into the central mixer and not into trucks to ease discharge from the central mixer. Alternatively DARAFILL® LS is supplied in 1000 litres (in IBC) or 220 litre drums and is added to the premixed concrete on site in the mixer truck at a dosage rate of 1 litre per m3 of concrete. Mix design information may be obtained from GCP Applied Technologies.
| DARAFILL® LS | ||
| Appearance | Liquid | |
Material for backfill operations shall be cementitious Controlled Low Strength Material mixtures as supplied by concrete producer and contain DARAFILL® LS CLSM Performance Additive, as manufactured by GCP. Mixture ingredients and proportions shall be submitted for
approval. DARAFILL® S CLSM Performance Additive shall be added by the concrete producer personnel as per manufacturer’s recommendations.
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.
DARAFILL 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: 2025-05-13
https://gcpat.uk/en-gb/solutions/products/darafill-ls