Browse

Concrete and mortar made with Portland cement can be damaged when exposed to solutions containing sulphate. Waste water ofte n contains sulphuric bacteria, and so the piping is frequently damage due to sulphate attack. In case of concrete sewer pipes this phenomenon is caused mainly by the sulphur-o xidising and sulphate-reducing bacteria that are forming part of the biological circulation of sulphur and its compounds in biosphere. These bacteria take part in the dissimilatory part of this cycle and the bacterial ...

The cement as a building material significan tly affects the environment throughout the whole life cycle. The environmental assessm ent of products should be a factor of importance in term of protection of the e nvironment and human safety. Environmental assessment of type I which determines the criteria for materials and products is the most used evaluation process in Slovak Republic. Cements environmental criteri a within the Slovak eco-lab elling process include the energy consumption limitation for production ...

Building industry has an essential share in depletion of environment and, after food production, belongs to the largest consumer of raw materials. Exploitation, production or transportation of building materials, as well as build-up, operation or demolition of buildings requires massive amounts of energy and results in huge amounts of greenhouse or acidifying gasses emission, par ticipates in depletion of ozone layer, eutrophication processes or photochemical ozone creation. Selection of building materials, as pri...