Method and device for repairing concrete after fire, and storage medium

Abstract

The invention discloses a method for repairing concrete after a fire. The damaged concrete is repaired through a PCM by determining PCM repair parameters of the to-be-repaired damaged concrete, wherein the PCM can penetrate into pores of the concrete and thus can fuse with the damaged concrete, and therefore, when the PCM is utilized to repair the concrete after the fire, the durability and repairstrength of the PCM are higher than those in the prior art; and secondly, when the PCM is utilized to repair the damaged concrete, the requirement for the levelness of the damaged concrete is avoided, and thus the repair limitation of the PCM is small. In addition, the invention further discloses a device for repairing the concrete after the fire, and a storage medium, and the effects are achieved.

Description

technical field [0001] The invention relates to the construction field, in particular to a repair method, device and storage medium for concrete after fire. Background technique [0002] Under the high temperature of fire, the strength and elastic modulus of concrete structures will decrease with the increase of temperature, which will cause cracking and deformation of concrete components. Concrete acts as a protective layer for steel bars. Once the protective layer is destroyed, the steel bars will be exposed and their strength indicators will drop rapidly under the action of high temperature, and then lose their bearing capacity. It even causes the collapse of the building. At the same time, under the action of high temperature, the internal porosity of the concrete will increase due to water evaporation and other reasons, and the durability of the concrete structure will decrease. Therefore, it is necessary to monitor and evaluate the damage degree of the concrete structu...

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Problems solved by technology

[0003] The traditional reinforcement methods for concrete structures after fire mainly include high-strength concrete strong repair method and direct FRP external reinforcement method, but the construction method of the former is more complicated and the bonding strength of old and new cement-based materials is weak, and this strength concrete cannot penetrate into the fire. The porosity of the post-concrete leads to poor durability and low strength of the repaired concrete; although the direct paste FRP reinforcement can repair the damaged structure well, this method requires a large degree of concrete flatness. Therefore, using This method has great limitations in strengthening the concrete structure after the fire

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