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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.
DARAGROUT EXPAND (ST) 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 (ST) 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.
Industrial Slab on Grade
Commercial Slab on Grade
Seeing Concrete Shrinkage Neutralized with Daragrout Expand
What does neutralizing drying shrinkage look like? We wanted to find out, so we poured two test cubes. The only difference between the two is the addition of Daragrout Expand to the cube on the right. You'll be surprised at...Read More
|Effective Component||Aluminium powder|
|Homogeneity||Homogeneous (tested acc. to DIN V 20000-101, annex A)|
|Dry Material Content||> 95.0 m.-%|
920 ± 20 kg/m3
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|
May irritate skin and eyes; see Safety Data Sheet
|Shelf-life||Approx. 1 year in closed original containers|