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The Economic Times
The Economic Times
National
Shreya Biswas

In 1977, Pennsylvania tested an 800-foot road base made with power-plant scrubber sludge; its strength rose from 720 to 1,014 PSI over seven years

Pennsylvania Florida Ohio Texas

In 1977, an 800-foot section of a state secondary road in southwestern Pennsylvania became a test site for a road-base material containing dewatered flue gas desulfurization (FGD) scrubber material.

The demonstration used a pozzolanic road base made from lime, fly ash, bottom ash and dewatered FGD scrubber material. The entire base was placed in a single lift in one day and had a compacted thickness of 10 inches.

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