Australia: Recycled glass used for concrete

Australian researchers have proposed unwanted glass be used in the manufacture of concrete. CSIRO materials scientist, Kwesi Sagoe-Crentsil, says crushed glass can replace up to 20% of the sand used i…

Australian researchers have proposed unwanted glass be used in the manufacture of concrete. CSIRO materials scientist, Kwesi Sagoe-Crentsil, says crushed glass can replace up to 20% of the sand used in concrete, as both sand and glass are mostly silica. Sagoe-Crentsil said that although the research needs further development before use in construction projects, local councils could use the process for concrete footpaths, kerbing and guttering. The process is safe and cheap, he said. Currently, a disincentive to glass recycling is the need to colour-sort. That would not be an issue if glass were to be incorporated in the manufacture of concrete.