DARAGROUT® EXPAND (EH)

Non-shrink grout admixture for mortar and concrete with strong swelling effect Additive for non-shrink grout acc. to EN 934-4:T2

Fields of Application

DARAGROUT EXPAND (EH) is predominantly used for the production of swelling mortars and concretes. Swelling concretes secure an effective filling of larger cavities, e.g. filling of larger joints between construction parts, filling of brittles from rock formations or constructions, casting of pipe ducts such as for drinking water purification plants, as well as for underpinnings in foundations.

DARAGROUT EXPAND (EH) is also used for the manufacture of cementitious mortars with swelling properties for filling, injection into smaller voids for tasks in building and civil engineering constructions or underground structures. Possible applications are above all injection, sealing and strengthening of cracks, fissures, porous patches, filling of joints between construction parts as well as the casting of cavities underneath floor screeds.

Technical Data

Effective Component Aluminium powder
Form Powder
Homogeneity Homogeneous (tested acc. to DIN V 20000-101, annex A)
Colour Light grey
Dry material content > 95.0 m.-%
Bulk Density 920 ± 20 kg/m3
pH-value 8.0 ± 1 (3% suspension)
Total chloride content < 0.10 m.-%
Water-soluble chloride content < 0.10 m.-%
Alkali content approx. 0.5 m.-%
Storage Keep dry and well closed in original containers
Recommended Dosage 0.20–2.00 m.-% of cement
Delivery Form 25 kg sacks; 25 kg boxes (50 bags per 500 g)
Physiological effect May irritate skin and eyes; see Safety Data Sheet
Shelf-life Approx. 1 year in closed original containers

Properties/Mode of Action

Compared to unmodified concretes or mortars, DARAGROUT EXPAND (EH) allows a reduction of the water requirement, increases the flowability and reduces bleeding and segregation. Workability and flowability are significantly increased by using the product which makes for an easier access even into smallest cavities.

DARAGROUT EXPAND (EH) forms micro air bubbles in the plastic cement gel in order to compensate the settlement by increase in volume. Swelling is finalized after 2–4 hours depending on ambient temperatures and proceeds slowly with little pressure so that the grout can encase all surrounding surfaces completely and fill the smallest voids. The formation of pores that effects the swelling is to be considered in advance by incorporating a strength reserve.

Dosage and Use

Best results are obtained when DARAGROUT EXPAND (EH) is added as the last component to the mix after about half of the total mixing time. However, it can also be added to the concrete or mortar together with the gauging water.

Special Information

The product is suitable for use in pre-stressed concrete. When using non-shrink grouts in combination with chromate-reduced cements a different setting and hardening may occur.
Preliminary tests according to official national standards are always required before use!

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.

DARAGROUT 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 2016 GCP Applied Technologies Inc. All rights reserved.

GCP Applied Technologies (UK) Ltd., 830 Birchwood Boulevard, Birchwood, Warrington, WA3 7QZ United Kingdom

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/betec-grouts-and-cementitious-mortars/daragrout-expand-eh