The rule of thumb is that it takes 4 weeks for a concrete driveway to fully cure. I admit I've never built a launchpad for the world's biggest rocket, but I'd

The rule of thumb is that it takes 4 weeks for a concrete driveway to fully cure. I admit I've never built a launchpad for the world's biggest rocket, but I'd wave my hands to say it might take a bit longer for that concrete, and it won't get poured immediately.