In cooperation with specialists from the field, our company has developed products for use in sewerage systems, which are used for building as well as reconstruction of sewer networks. And what is most important – they increase the service life of these works several times (!) in comparison with other materials and technologies.
In order to prevent defects of concrete sewers, it was condluded that the most efficient solution will be the one that would minimize the number of joints at the bottom part of the sewer and for which the highest quality building material is used. The solution of this issue is the result of cooperation between the workers from PKVT s.p. and EUTIT s.r.o. – sewer troughs made from cast basalt. High resistance to abrasion effects of materials suspended in water and materials being moved over the bottom and practical indifference of cast basalt to aggressive effects of substances contained in sewage water are further advantages of this solution. Despite the fact that a basalt trough is more expensive than e.g. a ceramic trough, its usage in reconstruction works of the sewage network shall provide significant savings as well. Current technology of building brick sewers enables their introduction to operation after covering the trough, performing at least part of the bottom masonry and its pointing. For this period of work, alternative temporary drainage must be used. In the case of basalt troughs, laying is accomplished in a short time and they can be used soon for drainage of waste water. Short-term closure of sewage may be bridged over by pumping.
In both cases, there is a risk of rain flow and impairment of performed building works. The condition for long life of a brick sewer with a basalt trough is correct implementation of concrete work and quality performance of load-bearing concrete at the bottom part of the sewerage. To ensure this requirement, a liquid mixture made in central concrete mixing plants is used and it is transported in mixers to the building site and placed using hose-pipes and pumping.
Basic physical properties:- compressive strength (ÄŒSN EN 993-5):
- wear resistance (ÄŒSN EN ISO 10545-6):
- Mohs hardness (ÄŒSN EN 101):
- range of application:
- absorptivity (ÄŒSN EN ISO 10545-3):
- volume mass (ÄŒSN EN 993-1):
- coefficient of length thermal expansivity 0 - 100 °C:
- min. 300 – 450 MPa
- max. decrease 110 mm3
- min. 8. degree
- pH 3 to pH 13
- 0 %
- 2900 - 3000 kg.m-3
- 8·10-6 K-1
- -physical properties are maintained through the whole diameter
- -absolute resistance to corrosion of natural material
- -very low hydraulic roughness compared to concrete, K = 0.04 mm
- -absolute chemical resistance to sewage water
- -zero absorptivity prevents leaking and contamination of groundwater
- -ensured adherence to concrete and a possibility to secure with anchorage elements
- -geometric accuracy of the products ensures minimal joints and savings on cements
- -absolute resistance to rodents