The purpose of curing is to create suitable temperature and humidity conditions to ensure or accelerate the normal hardening of concrete. Different curing methods have different effects on the performance of concrete. The common maintenance methods include natural curing, steam curing, dry wet heat curing, high pressure sterilization, electric heating curing, infrared curing and solar energy maintenance. The time of maintenance experience is called maintenance cycle. In order to facilitate comparison, specimens specifying concrete properties must be cured under standard conditions. The standard maintenance conditions adopted in China are as follows:
Level I control temperature is 20 ± 2 ℃, level II control temperature is 20 ± 5 ℃, standard curing time is 28 days, humidity is not less than 95%.
Concrete curing includes natural curing and steam curing.
It is important to cover the concrete surface with tarpaulin to prevent the concrete surface from evaporating in time, and to prevent the concrete surface from evaporating. Surface moisture. Before the concrete of the exposed surface cover is first cured, the cover shall be rolled up and the surface shall be rolled up at least twice with a trowel to make it flat and covered again. At this time, it should be noted that the cover should not directly contact the concrete surface before the concrete sets.
