A preparation method of 3D-printable electromagnetic protection phosphate material

Abstract

The invention discloses a preparation method for an electromagnetic protection phosphate material capable of being subjected to 3D printing. According to the method, phosphate cement and a porous aggregate material are utilized for preparing functional phosphate cement integrating electromagnetic wave absorbing and heat preservation integration, an electromagnetic wave absorbing structure is printed on the surface of a concrete structure by utilizing the performance of intelligence, flexibility, precision and the like of the 3D printing technology, and the porous aggregate material is porous EPS, and the dual effects of achieving electromagnetic wave absorbing and protection on the concrete structure and improving the heat preservation performance of the concrete structure are achieved.

Description

technical field [0001] The invention belongs to the technical field of new building electromagnetic protection materials, and specifically relates to a preparation method and a use method of a 3D-printable electromagnetic protection phosphate material. Background technique [0002] At present, there are many technologies and researches on the electromagnetic protection of concrete structures. Electromagnetic protective coatings are the most widely used because of their low cost, simple process, strong applicability, and no need for special equipment. Applying a layer of coating on the surface of the building structure can achieve Electromagnetic protection effect. 3D printing technology has been widely used due to its characteristics of no model, intelligence, flexibility and speed. The combination of 3D printing technology and electromagnetic protection technology can effectively purify the electromagnetic pollution environment and establish a green electromagnetic ecologi...

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Problems solved by technology

However, it is susceptible to changes in ambient temperature and humidity and different ways of use, resulting in problems such as low service life, easy to fall off, easy to crack, and poor environmental friendliness, which seriously reduces its electromagnetic protection performance.

For the research of commonly used electromagnetic absorbing materials, most of them focus on ordinary Portland cement-based electromagnetic protection materials, which have poor adhesion and cannot bond the surface of the existing structure, and cannot achieve the effect of rapid repair of electromagnetic protection.

[0005] 2) Poor electromagnetic protection effect: The traditional construction process is manual stirring and smearing of electromagnetic protection materials, which cannot guarantee the uniformity of all material composition and application process, so the thickness and material uniformity of the electromagnetic protection layer cannot be guaranteed, which may easily cause partial electromagnetic protection failure

Moreover, the construction steps of electromagnetic protection structures manufactured by traditional manual painting and spraying processes are cumbersome, the construction level is high, and the construction quality is difficult to guarantee, which also reduces the electromagnetic protection effect.

In addition, artificial coating of the surface of the protective coating cannot make a textured surface structure (such as "S-shaped", "X-shaped" and strip-shaped structures), which also greatly reduces the absorption efficiency of electromagnetic waves

[0006] 3) Low strength and toughness: Commonly used cement-based electromagnetic protection materials are mostly resistive and dielectric wave-absorbing aggregates modified cement-based materials, which have single functionality, low strength and toughness, and are prone to damage to the protective layer under external force

For example, graphite-modified cement-based materials, because the addition of graphite reduces the working performance and strength index of concrete, thus reducing its structural performance; ferrite-modified cement-based materials, which have a single function and only have electromagnetic protection properties, The strength and toughness properties of the material cannot be guaranteed

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