CONSTRUCTION MATERIALS RESEARCH PROJECTS AT COVENTRY UNIVERSITY
RECYCLED GYPSUM Back to home page
Full Title: Gypsum Waste Reduction
Academic staff: Dr P A Claisse, Dr E Ganjian
Research Staff: Seema Karami
Funding to CU: £16,000 from industry, + £102,000 from EPSRC/NERC/industry
Research Partners: Professor Alan Atkinson and Dr Mark Tyrer at Imperial College of Science, Technology and Medicine , Dr Gurmel Ghataora at Birmingham University
Industrial partners: Lafarge Plasterboard and Huntsman Tioxide
Each year the titanium dioxide (white pigment) process produces 125,000 tonnes of impure (red) gypsum in the UK, and far larger quantities worldwide. The construction industry also produces large quantities of waste gypsum in the form of plasterboard off-cuts and production rejects. We have found that this material can be used to make "Controlled Low Strength Materials" which are low strength concretes, which are used extensively in the USA for trench backfill, and other applications in construction.
Following from an industrial contract to find uses for the red gypsum; we were awarded funds in the Faraday Mini-Waste programme from the Environmental and Physical Sciences Research Council, and the Natural Environment Research Council.
The programme researched a range of ideas to use red gypsum in construction, or even to modify the process to produce clean white gypsum in place of the red gypsum.
Placing a trial pour of "Controlled low strength material" made with waste gypsum and steel slag.