Repair surface damage by applying a layer of concrete patch with a mason's trowel. For structural damage, place the concrete mix over the holes or damaged areas with a square-headed shovel. Fill the holes and smooth the surface with a trowel. Work new concrete into the pores of existing concrete.
Coat the inside of the mold with cooking oil spray so that it does not stick to the new cement patch. Then apply a plentiful layer of latex adhesive liquid on the chipped surface. In a plastic bucket, mix a small batch of quick-setting cement, such as Quikrete's FastSet cement. Pick up some of the cement with a pointed trowel and press it firmly into the shape (top).
Lightly fill the corner, then smooth the cement flush with the top of the step. Allow the repair to dry overnight before carefully peeling off the tape and removing the mold. Spray the damaged area with water from your spray bottle, just enough for a ready mist. Using the trowel, apply the wet cement to the broken parts of the cement steps.
Make sure you really work in every nook and crack. Keep in mind that you can always use Cement All and NewCrete together, as a team remedy for the entire spectrum of problems that threaten to destroy any concrete installation. In many cases, concrete can last for decades without deteriorating or requiring much in maintenance mode. For both construction professionals and homeowners, concrete offers many attractive qualities, but there may not be any greater than its undeniable durability.
Perhaps no hardscaping feature suffers as much as concrete stairs, which are subject to heavy foot traffic that only serves to accelerate deterioration. While the dough filling is still moist, carry more concrete with the margin trowel and pat it instead. Hold the wooden mold against the chipped corner and flush with the top of the step; secure it with long strips of adhesive tape. You may want to contact any professional for your project if the damage to the concrete steps is extensive or if it extends deep within the structure of the steps.
First, the area of concrete to be repaired must be cleaned without problems of all debris, dirt, dust and moss, as any of them can cause the repair section to fail. Enough water should be used to saturate the concrete substrate, and stagnant water should be removed. The patch will not match the color or texture of the steps, so you may want to re-coat all steps with a concrete resurfacing for a consistent look. You remove damaged areas, rebuild them with new concrete, and then coat all your steps to give them a uniform look.
There is also the fact that compromised concrete can be a tripping hazard, never more than on stairs. Concrete steps whose tread tips or corners are chipped can be repaired by first cleaning the area and then sculpting a replacement section with concrete and a margin trowel. To make the new concrete match the old one, hammer some of the original pieces that fell off until a fine powder is left and sprinkle over the patch while it is still wet and level carefully.