Abstract
This paper aims to explain the use of secondary materials in design details. Primarily, attention is paid to flat roofs, for which there is currently a wide range of technologies needed for user-friendly operation of a building. Recycled materials are still often looked down on and, therefore, it is important to show that even these elements may work very well in constructions. They must meet strict criteria for static and thermal properties. Furthermore, they must comply with fire and weather resistance requirements. They also have acoustic, secondary and aesthetic function. The roof structure is one of the basic segments that characterize the final properties of the building. Any malfunctions will lead to increased economic costs and degradation of users’ environment.
Highlights
Government decrees of the Czech Republic, and EU membership bring about requirements for reducing energy consumption
Flat roofs begin to be more and more equipped with technological devices which cannot be placed inside structures due to space, financial and operational constraints
In places where technological devices are to be installed on roof structures in the future, thermal insulation materials with higher compression strength are applied in the composition of the roof cladding
Summary
Government decrees of the Czech Republic, and EU membership bring about requirements for reducing energy consumption. Civil engineering industry is forced to find and develop new construction elements and construction technologies. Taking over tested details and elements from other countries is not desirable due to different climatic conditions in the Czech Republic. It is necessary to deal with the issue of community and corporate waste. Connecting civil engineering with a potential to integrate waste secondary materials seems obvious. The most used is the waste from demolition works (e.g. debris), asphalt waste from road reconstructions, and plastic materials. Community waste can be divided into sorted and unsorted (currently, mainly two types of glass, plastic – mostly unsorted, in some cases strictly sorted, e.g. PET bottles and paper). Plastic secondary material is technologically and economically more demanding to recycle and unsuitable to be reused in food industry
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