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I have a 75 year old sidewalk/walkway which has settled and cracked. I would like to pour new concrete over the old sidewalk to bring it back up to proper grade and at the same time avoid breaking up and disposing the old sidewalk. I have several questions:
1)How thick should the new concrete be?
2)What type of concrete should be used?
3)Should I use re-bar or wire mesh reinforcement in the new pour?
4)Should the old sidewalk be prepared in any way, such as cleaning with a chemical to achieve a better bond?