KrampeHarex GmbH & Co. KG
Pferdekamp 6-8
59075 Hamm

 +49 02381 977 977
F +49 02381 977 955

Office hours

Mon - Thurs 7 a.m. - 5 p.m.
Fri 7 a.m. - 2 p.m.

Shipping times

Mon - Fri 6 a.m. - 2 p.m.

Project information

Special feature

of the Project

In Ground-Support protection, it is important to achieve safe and permanently reliable results when spraying the steel fibre concrete. An optimized concrete composition and coordinated fibre dosage is required.

Ground-Support with steel fibre concrete

Optimization of the results

The company Sachtleben Bergbau has so far used a steel fibre shotcrete with a dosage of 40 kg/m³ for the tunnel support in the mine “Grube CLARA”. The aim was to reduce the dosage rate and achieve at least the same performance. Numerous tests confirmed that the same or better results could be achieved with the steel wire fibre DE 35/0.5 N from KrampeHarex and a dosage of 26.7 kg/m³ or the DE 35/0.6 N with 33.3 kg/m³.

The steel fibre shotcrete is applied in the pit with a mobile sprayer with a smaller compressor to reduce dust generation and minimize fibre rebound. After the material is excavated and conveyed, the steel fibres are collected out through liquid separators and magnetic separators to obtain a pure product.

The concrete formulation considered and optimized consists of 425 kg of cement, 1,670 kg of sand and 210 kg of water. The w/c ratio is 0.5 and about 11% accelerator is dosed.

Do you have questions
about the project?

We look forward to hearing from you.

Ja, ich habe die Bedingungen gelesen und akzeptiere sie.