The Application of Demolition Materials in Gypsum Concrete Production Ardakani, M.H.M. Building and Housing Research centre, Tehran, Iran (email: [email protected]) Abstract The application of gypsum concrete as non-structural construction elements has long been practiced. This paper deals with recycled aggregates derived form construction demolition debris in the production of gypsum concrete. The experimental program compares the performance of natural sand aggregates with recycled aggregates in gypsum concrete specimens. Keywords: demolition materials, gypsum concrete, physical and mechanical properties 69