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Concrete findings

Recycled glass can be used in concrete manufacture, a study by the Waste and Resources Action Programme (WRAP) has found.

Waste glass can be used as an aggregate and pozzolan (a material that causes compounds to form cement) and the resultant product complies with the appropriate British Standards for concrete.

As a result of the research, BRE Certifications has produced a pre-certification report stating that ground glass pozzolana is suitable for use as a pozzolanic cement-replacement material.

WRAP material sector manager Andy Dawe said: The use of waste glass as an aggregate and pozzolan in concrete manufacture has huge potential that has not been exploited due to a lack of standards and third-party certification.

Industry now has tentative specifications and pre-certification reports that may increase confidence in glass as a material that can be used in concrete, especially as a pozzolan and decorative aggregate.

The studies, conducted by the Centre for Cement and Concrete at the University of Sheffield, have also resulted in a prestigious award. Research associate Huiying Zhu won the 2004 Concrete Society National Student prize at the Concrete Society Awards dinner held in London recently.

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