Self-repairing inorganic material and preparation method thereof

Abstract

The invention discloses a self-repairing inorganic material and a preparation method thereof. The self-repairing inorganic material comprises the following raw materials, in percentages by weight: 0.001-0.005% of nitric acid, 2-6% of zinc tartrate, 18-21% of tartaric acid, 3-6% of citric acid, 3-6% of calcium nitrate, 22-29% of a MnWO4 composite powder material, 13-18% of a cuprous oxide / MnWO4 composite powder material, and the balance of MnWO4. According to the material and method provided by the invention, the processes of roasting, grinding, secondary tempering and the like are adopted in the preparation process, so that the material has good water resistance and good self-repairing performance, and can be widely used in the field of construction; the cuprous oxide / MnWO4 composite powder material facilitates strength of a loose acicular structure, and the MnWO4 composite powder material greatly improves the overall impermeability of the structure; and the material can substantiallyimprove re-crack permeability and strength loss caused by damage cracks of ordinary concrete.

Description

technical field [0001] The invention belongs to the field of composite materials, in particular to a self-repairing inorganic material and a preparation method thereof. Background technique [0002] The traditional concrete repair technology is mainly regular maintenance and post-event maintenance, but this negative and passive maintenance method is not only expensive, but also ineffective, and cannot meet the requirements of modern engineering structures for concrete materials. Therefore, it is urgent to adopt some technology or method to actively and automatically repair cracks and damaged parts, so as to restore or even improve the strength of concrete materials and prolong the service life of concrete structures. In recent years, researchers have proposed a new concrete crack repair technology-self-healing technology. Crack self-healing concrete imitates the function of biological tissue to automatically secrete certain substances to the wounded part, so that the wounde...

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Problems solved by technology

[0003] Although the above self-healing methods for concrete cracks can repair concrete cracks to a certain extent, these methods also have obvious shortcomings: the repair amount of mineral self-healing method is limited, and the repair efficiency is low; although fiber reinforced cement-based composite materials are better than ordinary Concrete has high potential self-healing properties, but the self-healing process is too long and the effect is poor; the disadvantage of microcapsule and glass fiber tube self-healing technology is that once the self-healing agent is exhausted, it cannot continue to provide self-healing agent, The self-healing of cracks has not been fully realized, and after the repairing agent is used up, the container that encapsulates the self-healing agent will leave holes in place, which will become a weak link in the concrete and have a negative impact on the strength of the concrete material. When organic matter such as oxygen resin is used as a crack repair agent, its durability, compatibility with the concrete mechanism, and impact on the environment need to be further analyzed; the cost of the active concrete self-repair system using smart devices is too high, and the limitation its application in construction engineering

[0005] Although the above-mentioned patent can penetrate into the concrete and react in the capillary pores to produce crystals to block the channels, the strength of the crystals cannot be guaranteed and the channels cannot be completely blocked, so the compressive strength and waterproof effect are poor, and the application site is the concrete base surface. Its penetration distance is limited, and the thickness of the waterproof layer is relatively thin. The waterproof effect is only limited to the surface of the concrete base surface. Once the base surface is cracked, worn or weathered, it can cause water seepage

The above-mentioned patents are only one-time waterproofing, and cannot be self-repaired when the concrete structure is penetrated again by water or partially damaged and cracked. Seep

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