Daragrout Expand
- Description
- Specifications
- Instructions
- Applications
- Documentation
Daragrout Expand (ST) is an admixture predominantly used for the production of swelling mortars and concretes. It 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.
| Effective Component | Aluminium powder |
|---|---|
| Form | Powder |
| Homogeneity | Homogeneous (tested acc. to DIN V 20000-101, annex A) |
| Color | 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 |
| Physiological Effect | May irritate skin and eyes; see Safety Data Sheet |
| Shelf-life | Approx. 1 year in closed original containers |
Best results are obtained when Daragrout Expand (ST) 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.
Daragrout Expand (ST) 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.
Industrial Slab on Grade, Commercial Slab on Grade, Pour-in-place, Residential Slab, Grouts