TERRAquell
TERRAquell is used as a flushing additive for flushing bore holes. As a result of its swelling properties, TERRAquell stabilises the bore hole halls and also seals any crevasses in it.
TERRAquell must not be used as the sole backfilling material for ground heat sensors. It may only be used for this application if the ingredient specifications of VDI 4640 are satisfied (for example mixture of TERRAquell, blast-furnace cement, quartz sand and water). The ready-mixed pressing material Calidutherm® is more suitable for use as the sole pressing material for ground heat sensors.
At the place of use, TERRAquell is mixed in a flushing tank or the like with a hand-held mixer until it is completely dissolved to produce a suspension that can flow and be pumped. After placing the appropriate volume of water in the vessel, the corresponding quantity of TERRAquell must be added whilst the mixer is running, depending on the crevasse formation in the geology concerned. The time-dependent increase in the thixotropy of the material (increase in rigidity over time) should be observed.
TERRAquell is made up predominantly of active swelling clay minerals (Smectites). TERRAquell contains only natural ingredients. It complies with the specifications of TRGS 613 and DIN EN 196-10 of < 2ppm in soluble Cr VI. This means that TERRAquell can be described as chromate-free.
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