Figure 7-55.-Repairing concrete with dry-packed mortar.
Where absorptive form lining has been used, the patch can be made to match the rest of the surface by pressing a piece of form lining against the fresh patch.
View A of figure 7-56 shows an incorrectly installed patch. Feathered edges around a patch lack sufficient strength and will eventually break down. View B of the figure shows a correctly installed patch. The chipped area should be at least 1-inch deep with the edges at right angles to the surface. The correct method of screeding a patch is shown in view C. The new concrete should project slightly above the surface of the old concrete. It should be allowed to stiffen and then troweled and finished to match the adjoining surfaces.
NOTE Although the following references were current when this TRAMAN was published,
Figure 7-56.-Patching concrete.
their continued currency cannot be assured. You therefore need to ensure that you are studying the latest version.
Concrete and Masonry, FM 5-742, Headquarters, Department of the Army, Washington, D.C., 1985.
Concrete Formwork, Keel, Leonard, American Technical Publishers, Homewood, Ill., 1988.
Steelworker 3 & 2, NAVEDTRA 10653-G, Naval Education and Training Program Management Support Activity, Pensacola, Fla., 1988.Continue Reading