Unique concrete admixture
Fig. 1 Crack formation at the concrete surface. 
Abb. 2 Rissheilung durch autoreaktive,... Schomburg ICS GmbH presented its Betocrete®-C Series, from now on consisting of three types, at bauma 2010 for the first time. The products serve as an integral waterproofing of concrete in contact with ground and water. The C series includes the world-wide one and only liquid, crystalline waterproofing concrete admixture being approved in compliance with EN 934-2. This is an effective answer to the issue of lump formation in concrete when adding powder additives of a similar kind.
Once the concrete has been used up in building in areas being in contact with ground and water, no matter whether the waterproof concrete basement system applied is a „black, white or brown tank“, the repair of cracks requires great effort and substantial expenses, particularly as water mostly ingresses into a building structure irrespective of the point of damage. The innovation of the Betocrete®-C series is therefore all the more important – the liquid, crystalline admixtures of the same are added to the fresh concrete and are latently acting until the end of the serviceability of the building structure. The concrete is thus sealed from inside, i.e. the liquid admixture becomes an integral part of the concrete structure. A homogeneous and reliable dispersion of the active agents in the concrete structure is therefore guaranteed at any time.
The product series includes Betocrete-C-16, Betocrete-C17 (BV). The groundbreaking innovation is Betocrete-C21 (DM), which was only established in the standard (EN 934-2) at the beginning of this year and this time even in the efficiency class of sealing agents. Apart from the likewise pore filling effect, the third generation of the C series has slightly plasticizing and hydrophobizing properties. Betocrete-C-21 enables manufacturing an active waterproof concrete basement (white tank).
Active crack healing is the declared objective of the complicated interaction of all components of the Betocrete-C series, which has been proven in extensive test series by creating defined surface cracks – crack width up to 0.4 mm – in the test specimens and exposing them to a continuous water pressure.
This auto reactive, crack healing effect is significantly extending the durability of the reinforcement steel up to 30 years according to recognized calculation methods.
