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O'Fallon staff urges council to allow asphalt PDR in residential streets to address ACR damage
Summary
City pavement staff presented evidence of alkali carbonate reaction (ACR) damage, outlined repair techniques and costs, and asked council to allow asphalt partial-depth repairs (PDR) on residential streets; council members signaled support and staff said implementation will follow through budgets and the CIP.
City street-maintenance staff outlined a multi-pronged approach to persistent pavement damage at a June 26 workshop and asked the O'Fallon City Council to let crews resume asphalt partial-depth repairs (PDR) on residential streets.
Mister Bender, the city's pavement presenter, told the council some neighborhoods are “suffering from a condition called alkali carbonate reaction, ACR,” a chemical process in older concrete that “peels the slab apart from the inside.” He showed photographs of Country Orchard Drive and other streets to illustrate how ACR damage propagates through a slab and causes repeated failures.
Bender walked council members through the city’s toolbox of maintenance options — crack sealing…
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