Please see below for picture. I would like to repair the cracks, but am unsure as to the ideal product. For reference, the picture represents an area that is approximately 3 feet by 2 feet, with a slight depression of a couple inches. Leading contenders seem to be Quikrete Patching Compound and Quikrete Polymer-modified Structural Repair. It is a shared driveway that sees regular vehicle traffic and would be difficult to shut down for any period of time. Ideally, I would just patch the cracks and resurface/fill the depression at a later time. Primary objective is keep from getting worse. Thanks.
Best Answer
You typically don't repair something like that. It's likely very unstable, and any rigid repairs will quickly disintegrate. If you are limited by logistics or budget, consider a flexible skimcoat overlay to mask the damage and bring it to a rough level. Specific product recommendations are off-topic (and I don't have any anyway).
Really, the corners (or entire sections) should be cut out, and new concrete poured.