Bridge Deck Hollow Plane Repair Using Injected Epoxy

摘要

Four delaminated bridges were epoxy injected and compared to noninjected bridges so that information on delamination repair durability, frequency, and costs could be collected. The injection history, cores, and condition reports for each bridge demonstrated that the plane of delamination once repaired, stayed repaired, but a new delamination may form above, below or adjacent to the one repaired, yet the deck surface remained intact even when the frequency of repair was once every three or four years. Using 1984 repair costs and comparing with 1984 calculated thin bonded overlay costs it is proposed that a bridge deck can be repaired by epoxy injection (if it is started when delaminations are few) at lower costs than by using a thin bonded overlay. Decks with greater delamination area can be effectively repaired and remain safely serviceable until other repairs can be scheduled. The use of timely epoxy repair for a bridge undergoing untimely delamination extends the useful life of the original deck.