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CN-121975358-A - Composition for coating material, preparation method and application thereof

CN121975358ACN 121975358 ACN121975358 ACN 121975358ACN-121975358-A

Abstract

The invention relates to the field of civil engineering materials, and discloses a composition for a coating material, the coating material, a preparation method and application thereof. The composition for the tuff-based inorganic protective coating material comprises 100-200 parts by weight of cementing raw materials, 5-10 parts by weight of quartz sand, 40-70 parts by weight of zinc silicate and 10-50 parts by weight of alkaline activator, wherein the cementing raw materials comprise 10-50% by weight of slag, 10-50% by weight of metakaolin and 10-50% by weight of tuff powder. The tuff-based inorganic protective coating material prepared based on the composition has the characteristics of high strength, high cohesiveness and strong corrosion resistance.

Inventors

  • ZHANG ZUHUA
  • ZHANG JINLIN
  • SHI CHENG
  • Zhu Yingcan
  • LI ZHENXUAN
  • CAI CHENGLONG

Assignees

  • 上海百奥恒新材料有限公司

Dates

Publication Date
20260505
Application Date
20260403

Claims (10)

  1. 1. A composition for a tuff-based inorganic protective coating material is characterized by comprising a cementing raw material, quartz sand, zinc silicate and an alkaline activator; The content of the quartz sand is 100-200 parts by weight, the content of the zinc silicate is 5-10 parts by weight, and the content of the alkaline activator is 40-70 parts by weight relative to 100 parts by weight of the cementing raw material; wherein the cementing raw material comprises 10-50wt% of slag, 10-50wt% of metakaolin and 10-50wt% of tuff powder; the limestone powder contains 75-86wt% of SiO 2 , 5-15wt% of Al 2 O 3 and 0-10wt% of CaO, and the ratio of the total content of CaO and Al 2 O 3 to the content of SiO 2 is 0.1-0.3:1.
  2. 2. The composition of claim 1, wherein the cementitious raw material comprises 10-40wt% slag, 10-40wt% metakaolin, 30-50wt% fine limestone, and/or The slag contains SiO 2 、CaO、MgO、Al 2 O 3 , the ratio of the total content of CaO, mgO, al 2 O 3 to the content of SiO 2 is more than or equal to 2.0, and the average diameter of the slag particles is 5-50 mu m.
  3. 3. The composition according to claim 1 or 2, wherein the particles of the fine limestone particles have an average diameter of 48 μm or less and/or The metakaolin contains 40-55wt% of SiO 2 , 35-55wt% of Al 2 O 3 , 0-1wt% of CaO,0-2.5wt% of Fe 2 O 3 , and the average particle diameter of the metakaolin is 4-20 μm, and/or The particle diameter of the quartz sand is 0.1-2.5mm.
  4. 4. A composition according to claim 1 or 2, wherein the alkaline activator has a modulus of 1.0 to 1.8, and/or The alkaline excitant is prepared by mixing sodium silicate, sodium hydroxide and water in a contact way.
  5. 5. A process for preparing tuff-based inorganic protective coating materials, characterized in that it is carried out using the components of the composition according to any one of claims 1 to 4, comprising: (1) Firstly mixing the cementing raw material and zinc silicate to obtain a mixture I; (2) Performing second mixing on the mixture I and an alkaline excitant to obtain a mixture II; (3) And thirdly mixing the mixture II with quartz sand to obtain the tuff-based inorganic protective coating material.
  6. 6. The method according to claim 5, wherein the first mixing conditions comprise a stirring speed of 60-100rpm for 20-60s; And/or the second mixing condition comprises stirring rotation speed of 250-400rpm for 20-60s; And/or the third mixing condition comprises stirring rotation speed of 250-400rpm and time of 60-120s.
  7. 7. The method according to claim 5 or 6, further comprising stirring the slag, metakaolin, and tuff powder to obtain the cementitious raw material before the first mixing.
  8. 8. Tuff-based inorganic protective coating material prepared by the method of any one of claims 5-7.
  9. 9. The tuff-based inorganic protective coating material according to claim 8, wherein the tuff-based inorganic protective coating material has a 28-day compressive strength of 55-65 mpa, a 28-day flexural strength of 9-17 MPa, a flexural ratio of 15-30%, and a cohesive strength of 2.1-3.1 MPa.
  10. 10. Use of the composition for tuff-based inorganic protective coating material according to any one of claims 1 to 4, the tuff-based inorganic protective coating material according to claim 8 or 9 in civil engineering materials.

Description

Composition for coating material, preparation method and application thereof Technical Field The invention relates to the field of civil engineering materials, in particular to a composition for a coating material, the coating material, a preparation method and application thereof. Background Along with the progress of science and technology and the continuous increase of national engineering construction demands, the research of cementing materials is developing towards high performance, environmental protection and low cost, and is widely applied in the fields of building engineering, hydraulic engineering, road construction, ocean engineering construction and the like. The traditional organic cementing material has the problems of high cost, poor ageing resistance, low strength and the like. However, the conventional inorganic cementing materials represented by the silicate cement-based materials also have the problems of poor toughness, low flexural strength, poor bonding performance and the like, are difficult to meet the development requirements of high durability and long service life of buildings such as highways, bridges, water conservancy and the like, generate a large amount of carbon emission in the production process, and influence the environment. Therefore, the development of the low-carbon high-performance inorganic cementing material is a key for improving the mechanical stability of the structure, prolonging the service life of the structure and meeting the development of low-carbon economy. The geopolymer is used as an environment-friendly inorganic cementing material, and an active silicon-aluminum material is used as a precursor (such as slag, metakaolin, fly ash, coal gangue and the like) to react with an alkaline activator to form the cementing material with the characteristics of early strength, quick hardness, corrosion resistance and the like, so that the emission of CO 2 can be greatly reduced, and the cementing material is an environment-friendly building material which has the highest potential to replace the traditional Portland cement at present. However, existing geopolymer materials, like conventional portland cements, suffer from the disadvantage of high brittleness. Therefore, in order to improve the fracture resistance of the cement, researchers have improved the structure by adding fibrous materials, nano modifiers, and the like. The materials can form a compact three-dimensional network structure with a cementing material matrix at a microscopic level, so that the overall flexural strength and crack resistance of the material are improved. However, this method also has problems such as complicated dispersion process, uneven dispersion, and expensive material cost. In addition, the uneven dispersion not only has limited improvement range on the flexural strength, but also can cause remarkable reduction of the compressive strength, the flexural ratio of the existing inorganic coating material is about 10%, and the bonding strength is lower than 2 MPa. Disclosure of Invention The invention aims to solve the problems of low flexural strength and poor bonding capability of inorganic coating materials in the prior art. In order to achieve the aim, the first aspect of the invention provides a composition for tuff-based inorganic protective coating materials, which comprises cementing materials, quartz sand, zinc silicate and an alkaline activator; The content of the quartz sand is 100-200 parts by weight, the content of the zinc silicate is 5-10 parts by weight, and the content of the alkaline activator is 40-70 parts by weight relative to 100 parts by weight of the cementing raw material; wherein the cementing raw material comprises 10-50wt% of slag, 10-50wt% of metakaolin and 10-50wt% of tuff powder; The fine limestone powder contains 75-86wt% of SiO 2, 5-15wt% of Al 2O3 and 0-10wt% of CaO, and the ratio of the total content of CaO and Al 2O3 to the content of SiO 2 is 0.1-0.3:1. In a second aspect the present invention provides a method of preparing a tuff-based inorganic protective coating material using the components of the composition of the first aspect, comprising: (1) Firstly mixing the cementing raw material and zinc silicate to obtain a mixture I; (2) Performing second mixing on the mixture I and an alkaline excitant to obtain a mixture II; (3) And thirdly mixing the mixture II with quartz sand to obtain the tuff-based inorganic protective coating material. In a third aspect the present invention provides a tuff-based inorganic protective coating material prepared by the method of the second aspect. A fourth aspect of the present invention provides a composition for tuff-based inorganic protective coating material according to the first aspect, and the use of tuff-based inorganic protective coating material according to the third aspect in civil engineering materials. Compared with the prior art, the composition for the tuff-based inorganic protective coating mater