How soon can vehicles drive on concrete pavement?
2 Answers
Concrete pavement can generally be driven on after 12 hours. Concrete pavement: It refers to a road surface with cement concrete slabs as the top layer. Composed of cement concrete slabs as the surface layer, with a base layer and sub-base layer underneath, it is also known as a rigid pavement. Concrete joint issues: The main causes of joint damage are substandard filler material quality at the joints, leading to material aging under long-term environmental exposure, or thermal expansion of the slab surface squeezing out the filler, preventing proper restoration. Alternatively, there may be no filler at all in the joints, with an accumulation of debris like sand and mud causing joint damage.
I've been dealing with this kind of road surface for years, and I feel that after concrete is freshly laid, you need to wait at least 24 to 48 hours before letting light vehicles test the waters. In warm weather, like sunny summer days, the surface usually stabilizes after 24 hours, and small cars can carefully pass through. But in winter or rainy conditions, you might need to wait an extra day or even longer—72 hours or more is safest. Pressing too early is a bad idea; the road can sink or crack. I've personally seen a car drive over fresh concrete, causing the entire surface to collapse into a mess, and the repairs were extremely costly. During construction, we always use barriers and signs to warn against passage. Keeping the surface moist for the first day or two can speed up the hardening process, but don’t overwater it. High wind speeds or low humidity also require caution, as rapid evaporation can delay hardening. In short, be patient—wait a day or two before gradually opening the road to traffic to avoid trouble.
