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FHWA and many State DOTs are investing on<br />
research and development of standards and<br />
design guidelines for the use of recycled<br />
concrete and recycled asphalt aggregates for<br />
highway pavements and structures<br />
These concrete and asphalt materials can be<br />
effectively reused, saving a lot of virgin<br />
materials and eliminate many environmental<br />
problems<br />
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