Whenever rebar is used to reinforce concrete around a paving project (I emphasize a paving project because of the horizontal nature of the concrete usually means there will be water sitting on it for extended periods of time) the use of COATED rebar is imperative. The iron in the rebar will eventually oxidize (rust) and expand in the process. The more it oxidizes, the more it expands. The more it expands the more water it can collect and therefore the more it oxidizes and so on and so forth. Eventually you will get a massive failure like this municipal project on the Malaga (Spain) Beach Promenade. By the way, no sense in using coated rebar if you don’t also coat the ends yourself after cutting the pieces to the necessary length for your install. For those that may be interested contact me for information regarding a new generation of lightweight rebar that is a[...]
Remember, when implementing or installing a certain fixed pattern it is important to stick within the parameters of the original design. Improvisation and creativity are acceptable and even very admirable in the appropriate …..in this example; not so much!