Electric-induced curing method and curing equipment for concrete structures in negative temperature environment

Abstract

The electric excitation curing method and curing equipment for concrete structures in negative temperature environment. During the curing process of concrete structural parts in a negative temperature environment, due to the cross influence of the high temperature curing environment inside the concrete specimen and the external low temperature environment, when the temperature stress inside and outside the concrete structure exceeds the ultimate tensile strength of the concrete, the concrete structure will Inevitable cracking, lack of emergency measures to control or avoid cracking. In the maintenance process of the present invention under the negative temperature environment, when the concrete structure is a concrete structure without conductive filler, the mass transfer rate of the electric-excited curing concrete specimen is determined by the ratio of the concrete structure resistance in the maintenance process to the initial resistance of the concrete structure. Control point, when the concrete structure reaches the quality transfer control point, start the adjustment operation of the energizing power of the concrete specimen, so as to achieve the crack-free electric excitation curing process required by the curing temperature of the concrete structure in the fresh stage and hardening stage.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, and in particular relates to an electric excitation maintenance method and maintenance equipment for a concrete structure in a negative temperature environment. Background technique [0002] The average temperature of the coldest month in the cold region is below 0°C. Under such conditions, it is difficult for concrete structures to form strength due to the inability of normal hydration of cementitious materials. If reasonable maintenance measures are not taken, the construction of concrete structures in cold regions will be out of the question. In order to solve this problem, many methods including greenhouse method, heat storage and heat preservation method, and electric heat tracing method are used to maintain concrete structures under negative temperature environment to ensure the normal development of concrete structure construction projects. However, there are many limitations an...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a negative temperature environment concrete structure electric excitation maintenance method and its maintenance equipment to solve the problem of high temperature maintenance in the concrete specimen during the maintenance process of the concrete structural parts in the negative temperature environment, especially in the winter in the cold area. Under the cross influence of the environment and the external low temperature environment, when the temperature stress inside and outside the concrete structure exceeds the ultimate tensile strength of the concrete, the concrete structure will inevitably crack, and there is a lack of emergency measures to control or avoid cracking

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