Negative temperature environment concrete structure electrical excitation curing method and curing equipment thereof

Abstract

The invention discloses a negative temperature environment concrete structure electrical excitation curing method and curing equipment thereof. In the curing process of a concrete structural member in a negative temperature environment, under the cross influence of a high-temperature curing environment in a concrete test piece and an external low-temperature environment, when temperature stress existing inside and outside the concrete structure exceeds the ultimate tensile strength of concrete, the concrete structure is inevitably cracked, and emergency measures for controlling or avoiding cracking are lacked. In the curing process in the negative temperature environment, when the concrete structure is not doped with the conductive filler, the mass transfer control point of the electrically-excited cured concrete test piece is determined according to the ratio of the resistance of the concrete structure to the initial resistance of the concrete structure in the curing process, and when the concrete structure reaches the mass transfer control point, the conductive filler is added to the concrete structure. And starting the adjustment operation of the power-on power of the concrete test piece so as to meet the crack-free electrical excitation curing process required by the curing temperature in the fresh mixing stage and the hardening stage of the concrete structure.

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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