Environmental Indicators

SW Umwelttechnik has been documenting and publishing environmental indicator figures for air, water, waste and material resources for many years and uses them as a basis for the evaluation of its activities. This is done regularly by internal working groups, which also define the next steps to be taken in this field. Thus, we exploit our potential for ecological improvement even further.

Gravel is purchased from suppliers in the local region. The average transport route to our facilities is 10 km. The proportion sand / gravel per 1 m³ concrete has remained constant over recent years and is at 2 tons of sand / m³ of concrete.

The use of chemicals is kept to the minimum necessary. Additionally, we keep improving our processes to reduce our use of chemicals even further. Recently, we were able to cut the amount used almost by half, down to 0.06 kg / m³ concrete.

Binding agents
Cement is transported dust emission-free to our facilities using silo vehicles. Its use depends on the product mix and was at 379 kg/ m³ concrete in 2016.

The use of more environmentally friendly additives helps reduce the use of binding agents. In addition, their use results in better processing and higher product quality. A total of 2.9 kg additives were used per m³ of concrete in 2016.

Separating agents
Separating agents are used to separate the concrete from its casing. A total of 0.68 kg / m³ was used in 2016. The separating agents are part of the production cycle and are recycled.

Water and wastewater
The water is taken from company-owned wells, if possible. Water used in manufacturing processes is cleaned and refed into the production cycle via an internal cycle. Wastewater comes almost entirely from social areas. Such wastewater is fed into the public sewage system and/or treated in biological wastewater treatment systems.

Up to 95 % of the main component – rubble – is crushed into smaller parts and put back into the production cycle. The disposal of industrial waste and hazardous substances is done exclusively via state-licensed disposal companies and complies with all the official requirements and recording obligations.