Concrete quantity toolsWalking and vehicle traffic are different
There is no single waiting time that applies to every concrete mix and project. Foot traffic and vehicle traffic place different demands on a surface, so do not use a walking guideline as permission to drive or park on it.
First define the use you need to allow: walking, vehicle access, parking, or another load. A surface that looks firm does not confirm that it is ready for that use. Follow the instructions and project requirements for the specific concrete placed, and do not transfer a time listed for one use to a more demanding use.
Check the product and project instructions
Check the product name and the current technical information for the mix that was placed. Look for instructions that specifically address the kind of traffic planned, along with any conditions or curing requirements attached to that guidance. The same product family can have different instructions by product, so do not apply a time from another mix or project as a universal rule.
If the product information does not clearly address the use you plan to allow, keep the area closed and ask the concrete supplier or the professional responsible for the project. Do not substitute a curing-compound or sealer recoat time for concrete traffic guidance.
Keep the area protected until it is cleared for use
Keep people, vehicles, and other loads off the concrete until the applicable instructions allow them. A curing or sealing product may have its own application and recoat directions; those directions do not automatically establish when the concrete can carry traffic.
This guide does not approve a surface for use or replace project specifications, product instructions, or advice from the people responsible for the work.