History of Concrete Paving In Iowa - Iowa State University Extension ...
History of Concrete Paving In Iowa - Iowa State University Extension ...
History of Concrete Paving In Iowa - Iowa State University Extension ...
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1977 – Recycled<br />
Aggregates<br />
• Existing pavement recycled as<br />
coarse aggregate<br />
• US 75 Lyon, IA 2 Taylor, I-680<br />
Pott.<br />
• Class 2 or better Aggregate<br />
sources<br />
▫ 1979 - 191 sources<br />
▫ 2012 - 298 sources