TEMPERATURE CONTROL

When temperatures dip below 40 °F, the chemical reactions that strengthen concrete slow down and can lead to weaker concrete. If concrete curing temperatures are below freezing, the water inside the concrete can freeze and expand, resulting in cracks.

Use concrete curing blankets to prevent freezing and keep the concrete at an optimal curing temperature. Use insulation blankets or heated enclosures to maintain concrete temperatures above 50 °F for 3–7 days. Do not begin final finishing operations while bleed water is present.