Rehabbing Research

by Kneeland A. Godfrey, Jr., Sr. Ed.; Civil Engineering Magazine, ASCE World Headquarters, 345 East 47th Street, New York City, NY.,

Serial Information: Civil Engineering—ASCE, 1986, Vol. 56, Issue 9, Pg. 55-57

Document Type: Feature article


Because a growing share of Corps of Engineers' effort is going int rehabilitation, likewise a growing share of its research is too. This shift in emphasis is encouraged by an ongoing, six year &2235 million program of Repair, Evaluation, Maintenance and Rehabilitation (REMR). This article introduces the program's philosophy and mode of operation, and illustrates it with a case history of repair of the Brandon Road Lock on the Illinois Waterway. First rehabilitation step here was to remove old, deteriorated concrete on the lock walls. Concrete removal methods used are mentioned, as are new alternates recently put on the market. Before the replacement concrete is placed, steel anchors must be embedded in the face of the remaining concrete; reportedly two grouts (cement and epoxy) have performed well but a third (polyester resin) not as well under wet conditions. Likewise, there have been problems with cracking of newly placed lock-wall concrete; four alternative approaches that might reduce or eliminate cracking are described. An eventual goal is to do all the rehabilitation tasks (identification of structural problems, removal of bad concrete, and pouring replacement concrete) without dewatering. Some progress toward that goal is described.

Subject Headings: Rehabilitation | Case studies | Cracking | Maintenance | Highways and roads | Locks (waterway) | Deterioration | Walls | Illinois | United States

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