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Environmental suitability of recycled concrete aggregate in highways : [research summary].
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2015-01-01
[PDF-189.87 KB]
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Abstract:Natural highway aggregate is a finite resource that with continued use in construction
activities but some good quality aggregates used in existing concrete structures may be
re-used to replace with the natural aggregate. Due to the repair or replacement of aging
infrastructure, the increasing quantity of construction demolition waste generated, such
as concrete aggregates, cannot be wasted in landfills. Using recycled concrete
aggregate to replace with the natural graded aggregate base (GAB) or as Foamed
Asphalt in highway construction can contribute to a reduction in of greenhouse gas
emission and energy consumption but other environmental concerns need to be
addressed.
Therefore, the Maryland State Highway Administration (SHA) initiated a study to
evaluate the environmental sustainability of the use of recycled concrete aggregate
(RCA) as base material in for pavement construction.
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