DARAGROUT® 191 (EH)
Non-shrink grout admixture for use with injection grouts requiring controlled expansion and high flowability Additive for non-shrink grout acc. to EN 934-4:T2
Fields of Application
DARAGROUT® 191 (EH) is a grout admixture for injection grouts in prestressed concrete. Grout admixtures compensate the plastic shrinkage and the settlement of the cementitious grout, in the ducts containing the steel tendons and secure an effective bond between the tendons and the posttensioned concrete structural members. Therefore, the protection against corrosion of the prestressed elements is secured.
Further fields of application include the manufacture of highly flowable cement grout for injection into voids and for a complete filling, e.g. in underground cavity and tunnel constructions, brickwork constructions, improving properties of the ground by consolidating via injections, as e.g. underpinning of foundations, water sealing of dam projects (grout curtain), large field injections for waterproofing and compaction of the substrate of tunnels.
Technical Data
| DARACEM 19CFU | |
| Effective Component | aluminium powder |
| Form | powder |
| Homogeneity | homogeneous (tested acc. to DIN V 20000-101, annex A) |
| Colour | light brown |
| Dry material content | 95,0 ± 5,0 M.-% |
| pH-value | 9.3 ± 1 (3% suspension) |
| Total chloride content | < 0.10 m.-% |
| Water-soluble chloride content | < 0.10 m.-% |
| Alkali content | < 10.0 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 with 500 g) |
| Physiological effect | May irritate skin and eyes; see SDS |
| Shelf-life | approx. 2 year in closed original containers |
Properties/Mode of Action
DARAGROUT 191 (EH) enables a significant reduction in the water demand and in bleeding as well as a considerable increase of flowability, even at higher temperatures and controlled swelling properties to compensate the natural settlement of the cement paste.
Dosage and Use
DARAGROUT 191 (EH) is pre-dosed into the gauging water, subsequently the cement is slowly added. Mixing should be finished after 4 minutes at the latest. To prevent segregation of the grout, it must be constantly mixed in the storage container.
Special Information
Suitable for use with injection grouts in prestressed concrete. When using non-shrink grout admixtures with chromate-reduced cements, there may be unexpected side-effects, e.g. changed course of setting or hardening.
Preliminary tests according to official national standards are always required before use!
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GCP0082-1216 DARAGROUT-191-EH_DE-EN
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Last Updated: 2022-11-24
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