Steam method
Steam curing of concrete can be divided into four stages: static stop, heating, constant temperature and cooling.
Box beam steam method
After concrete pouring, the beam body is sealed with a curing cover, and steam is input to control the humidity and temperature around the beam body. When the temperature is low, input steam to raise the temperature, and after the initial setting of concrete, the bridge deck and the box are stored with water to keep moisture.
Natural protection method
During the curing period of formwork concrete, measures such as formwork wrapping, watering and sprinkling should be taken to keep moisture and moisture, so as to ensure that formwork joints are not dehydrated and dry. In order to ensure the smooth form removal, the formwork can be loosened slightly after 24 ~ 48 hours of concrete pouring, and the formwork can continue to be watered and maintained until the form removal, and then the formwork can continue to be moisturized to the specified age.