When repairing concrete, the best cement for filling large gaps and holes depends on the size of the void and the desired strength of the repair. For small gaps and holes, a pre-mixed concrete patching compound may be sufficient. These compounds are typically made with Portland cement, sand, and additives that improve workability and adhesion. For larger gaps and holes, a more durable repair material may be necessary, such as an epoxy-based concrete repair mortar. These mortars are made with epoxy resins and aggregate, and they offer high strength and resistance to chemicals and abrasion.
Regardless of the type of cement used, it is important to properly prepare the surface of the concrete before making the repair. This involves cleaning the surface of any dirt, debris, or loose concrete, and then roughening the surface to create a good bond for the new cement. The cement should be mixed according to the manufacturer’s instructions, and it should be applied to the prepared surface in a uniform layer. The cement should be allowed to cure for the recommended amount of time before the repaired area is put back into service.
