In 1972, Illinois used 246,000 cubic yards of coal fly ash beneath 7,500 feet of expressway; monitoring found no evidence of settlement, frost or capillary-rise problems
- More than five decades ago, civil engineers in northern Illinois carried out a major engineering experiment by using 246,000 cubic yards of coal fly ash beneath 7,500 feet of a major expressway embankment.
- The pioneering project, completed in 1972 near Waukegan along the US Route 41 corridor, was one of the earliest large-scale examples of recycling industrial waste for American highway construction.
- Long-term monitoring showed that the alternative fill performed very well, with no signs of structural settlement, frost heave or problems caused by rising groundwater.
Unverified
- More than five decades ago, civil engineers in northern Illinois carried out a major engineering experiment by using 246,000 cubic yards of coal fly ash beneath 7,500 feet of a major expressway embankment.
- The pioneering project, completed in 1972 near Waukegan along the US Route 41 corridor, was one of the earliest large-scale examples of recycling industrial waste for American highway construction.
- Long-term monitoring showed that the alternative fill performed very well, with no signs of structural settlement, frost heave or problems caused by rising groundwater.
Sources: Times of India