. Construction materials for coastal structures. Coastal engineering; Building materials. Figure 19. Concrete pile damaged by overloading (photo courtesy of Los Angeles Harbor Department). The repair of spalls from reinforcing bar corrosion requires a more detailed study. Simply replacing the deteriorated concrete and restoring the original cover over the steel will not solve the problem. Also, if the structure is salt-contaminated, the electrolytic conditions will be changed by the application of new concrete, and the consequences of these changed conditions must be considered before any repa
. Construction materials for coastal structures. Coastal engineering; Building materials. Figure 19. Concrete pile damaged by overloading (photo courtesy of Los Angeles Harbor Department). The repair of spalls from reinforcing bar corrosion requires a more detailed study. Simply replacing the deteriorated concrete and restoring the original cover over the steel will not solve the problem. Also, if the structure is salt-contaminated, the electrolytic conditions will be changed by the application of new concrete, and the consequences of these changed conditions must be considered before any repairs are undertaken. Basic requirements for achieving a durable repair are: (1) The repair material must be thoroughly bonded to the sound concrete of the cavity; (2) the shrinkage of the patch should be small enough not to jeopardize this bond; (3) the patch and its substrate should be free of cracks; (4) the response of the patch and the old concrete to changes in temperature, moisture, and load should be similar enough to avoid gross differences in movement; (5) the patch should be low enough in permeability that moisture will not migrate through it to the old concrete underneath; and 132. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Moffatt & Nichol, Engineers; Coastal Engineering Research Center (U. S. ). Fort Belvoir, Va. : The Center
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