Abstract: Concrete road pavements, parking areas, etc at some stage deteriorate to such a degree that they have to be removed or replaced by new materials. When the time of replacement has been reached, the question arises of what to do with the old concrete which consists of some 80% sand and gravel and some 20% hardened cement. Can these materials be recycled as aggregate in the production of high quality concrete for new concrete pavements. The study has included 4 different concrete pavement materials: a pavement at an airport from 1959, a road pavement from 1929 and two motorway pavements from 1968, of which one of the latter had deteriorated due to alkali silica reactions. Where existing pavement has shown rapid deterioration due to alkali silica reaction and/or bad concrete quality, it is not advisable to recycle the materials in a new concrete pavement. Existing pavement deteriorated due to fatigue and excessive loading after many years of use should be eligible for recycling.
Publication Year: 2023
Publication Date: 2023-06-14
Language: en
Type: book-chapter
Indexed In: ['crossref']
Access and Citation
Cited By Count: 2
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