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Author(s): K. Weimann, C. Adam
Paper category: Proceedings
Book title: IV International Conference Progress of Recycling in the Built Environment
Editor(s): Isabel M. Martins, Carina Ulsen, Yury Villagran
e-ISBN: Isabel M. Martins, Carina Ulsen, Yury Villagran
Publisher: RILEM Publications SARL
Publication year: 2018
Pages: 243-250
Total Pages: 08
Language : English

Abstract: During the last decades the material composition of buildings has become increasingly diverse.
However, largely sorted material flows are needed for generating high quality secondary
building materials. The use of secondary building materials can meet the requirements of
sustainability in several ways: the extended time availability of primary raw materials and,
thereby, the preservation of natural resources as well as the conservation of landfill sites.

Recycling of gypsum (calcium sulfate) can be a good example for the environmental benefits
of closed-loop recycling. The content of sulfates in other secondary building materials, in
particular in recycled concrete aggregates, should be minimized for quality reasons. In contrast,
separated gypsum can also be used in gypsum production if the high quality requirements for
the recycled gypsum are met. Since almost all processing steps in the recycling process are
associated with environmental impacts, an environmental evaluation of the use of recycled
gypsum as a substitute in gypsum production has to be carefully conducted.

This paper focusses on the techniques for generating recycled gypsum from gypsum
plasterboards, the related quality requirements and a comprehensive environmental evaluation
of the complete process.

Online publication : 2018
Publication type : full_text
Public price (Euros) : 0.00

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