I-80 is a main thoroughfare that carries travelers east and west through Pennsylvania. RAM Construction Services was chosen by Glenn O. Hawbaker to perform the repair of existing epoxy based surface treatments on three bridge decks as part of a 25.7 million dollar resurfacing project in Clarion County. The I-80 bridge decks over SR 338 and the Clarion River contained existing epoxy based surface treatments that were installed prior and in need of repair. The designed repair scope of work included sounding the existing systems to determine loose or poorly bounded overlay, removing identified areas, patching back the removed areas to existing elevation and installing a single epoxy based surface treatment top coat to the bridge’s entire deck area. Prior to beginning construction while the paving portion of the contract had lane closures on the bridge decks, RAM sent personnel to perform a thorough investigation into the condition of the existing overlay systems. Through the investigation, it was determined that the designed scope would properly repair the SR 338 bridge decks and extend their service life for years to come. However, the existing surface treatment on the Clarion River bridge deck was found to be in a state beyond repair and alternate methods would need to be evaluated. RAM proposed to completed remove the existing surface treatment system to the concrete bridge deck and install a new two course epoxy based surface treatment. Pennsylvania Department of Transportation engineer’s accepted the proposal and construction began.
At first, RAM utilized a flat-tooth mill skidster attachment to remove the existing system without removing any concrete in the process. Though the mill worked well, RAM’s team believed there were alternate methods that could perform the removal faster. RAM manufactured two skidsteer attachments which assisted in expediting the removal of the existing system off of the bridge deck which emphasized the poor condition of the existing surface treatment. Once removal was completed, RAM installed the new two course epoxy based surface treatment. Basalt aggregate was used in the surface treatment which is an extremely durable material in order to withstand the heavy traffic volumes the road sees and maintain the friction coefficients of the surface treatment. In total 100,692 s.f. of the existing system was remove and replaced and 13,860 s.f. was repaired per the original design scope. RAM also performed 23.3 s.f. of concrete deck patching prior to installing the new systems. The entire project was completed in 6 weeks.