Control Method of Maximum Temperature Range of Low-heat Cement Concrete in High Arch Dam

Abstract

The invention provides a method for controlling the maximum temperature range of low-heat cement concrete for high arch dams. Combined with the characteristics of low-heat cement concrete, it can not only give full play to its advantages to improve the crack resistance safety of dam concrete, but also prevent the maximum temperature of concrete from being too low. The opening of the transverse joints during the construction of the arch dam is too small, which affects the quality of the joint grouting and ensures the integrity of the arch dam; avoid controlling the maximum temperature of the concrete too low, especially when the ambient temperature is low in autumn and winter, low-heat cement concrete is the highest The temperature is more likely to be too low. After setting the lower limit of the maximum temperature of concrete, the maximum temperature can be appropriately increased by adjusting concrete precooling measures, water cooling measures, etc., which obviously saves the amount of temperature control and cooling engineering and investment; after setting the maximum temperature interval control standard, the actual construction The temperature control operation of concrete in the process is more flexible, which is convenient for on-site construction control.

Description

technical field [0001] The invention relates to a control method for the maximum temperature range of low-heat cement concrete of a high arch dam, which is suitable for high arch dams using low-heat cement concrete in water conservancy and hydropower projects, and controls the maximum temperature of the concrete during construction. Background technique [0002] With the construction and development of my country's water conservancy and hydropower projects, in recent years, through the progress of building materials manufacturing technology and the gradual application of hydropower projects, low-heat cement has been successfully applied to concrete high arch dams, which reduces the pressure and difficulty of concrete temperature control and provides dam Excellent temperature control and anti-cracking have brought huge engineering and economic benefits. [0003] Due to the composition of its mineral components, the low-heat cement has relatively low early hydration activity of...

AI Technical Summary

Problems solved by technology

like figure 2 As shown, a high arch dam uses low-heat cement concrete in an all-round way, and the opening of local transverse joints on the bank slope of the dam body during the construction period is not ideal

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