The technical points of large-volume concrete curing mainly include the following aspects:
Timely covering and watering: After the concrete is poured, it should be covered with straw curtains, plastic film, etc. in time to avoid the surface drying due to excessive exposure. At the same time, regular watering should be done to keep the concrete surface moist. The number and amount of watering should be determined on a case-by-case basis to keep the concrete moist.
Temperature control: Due to the large volume of concrete, the internal heat is not easy to dissipate, which can easily lead to a temperature increase. Therefore, appropriate measures should be taken to control the temperature, such as using cooling water, adding ice, etc. At the same time, pouring should be avoided during high temperature periods to avoid affecting the performance of concrete due to excessive temperature.
Regular testing: In order to ensure the quality of large-volume concrete, its strength, thickness, flatness, etc. should be tested regularly. If it is found that it does not meet the requirements, measures should be taken to deal with it in time.
Rational use of additives: In order to improve the performance of concrete, some additives can be added, such as water reducer, retarder, etc. Additives should be used rationally and operated in strict accordance with relevant specifications.
Pay attention to the concrete mix ratio: the mix ratio of concrete is an important factor affecting its performance. Appropriate raw materials should be selected and tests should be conducted to determine the best mix ratio. At the same time, the mixing should be ensured to be uniform to improve the quality of concrete.
Pay attention to the treatment of construction joints: construction joints are one of the key factors affecting the quality of bulk concrete. The location of the construction joint should be reasonably set and effective treatment measures should be taken, such as increasing steel bars and adding waterstops at the construction joints.
Through the control of the above technical points, the curing quality of large-volume concrete can be effectively improved, and the safety and stability of the project can be ensured.