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CN-122010429-A - Special cementing material for anti-corrosion concrete and preparation method thereof

CN122010429ACN 122010429 ACN122010429 ACN 122010429ACN-122010429-A

Abstract

The invention discloses a special cementing material for anti-corrosion concrete and a preparation method thereof, and relates to the technical field of building materials. The cementing material comprises, by mass, 1-4 parts of sugar slag, 15-25 parts of tailings, 0.5-1.5 parts of water reducer, 8-18 parts of slag, 25-35 parts of novel low-calcium clinker, 3-9 parts of white mud, 2-6 parts of microplastic, 3-8 parts of titanium gypsum and 15-25 parts of aluminoferrite cement clinker, wherein the mineral composition of the novel low-calcium clinker comprises 40% -50% dicalcium silicate, 25% -30% calcium sulfoaluminate, 3% -8% calcium sulfosilicate, 3% -8% tetracalcium aluminoferrite, 8% -15% calcium sulfate and 1% -5% free calcium oxide. The invention can consume a large amount of industrial solid waste, has the characteristics of low carbon, environmental protection and low cost, realizes the efficient comprehensive protection of various corrosion factors through the synergistic effect of micro-expansion, close packing, electric conduction retardation and self-sealing carbonization, and has the self-repairing and self-compaction capabilities, thereby remarkably prolonging the service life of the concrete structure in a severe environment.

Inventors

  • YANG LI
  • Yi Feiyang
  • ZHANG XUAN
  • LI CHAO
  • WANG NING
  • XIA YANQING
  • ZHANG LINGLEI
  • FAN YOUYIN
  • ZHU MENG
  • Qing ting
  • XIONG QIAN

Assignees

  • 嘉华特种水泥股份有限公司

Dates

Publication Date
20260512
Application Date
20260130

Claims (11)

  1. 1. The special cementing material for the anti-corrosion concrete is characterized by comprising the following components in parts by mass: 1-4 parts of sugar residues; 15-25 parts of tailings; 0.5-1.5 parts of water reducer; 8-18 parts of slag; 25-35 parts of novel low-calcium clinker; 3-9 parts of white mud; 2-6 parts of microplastic; 3-8 parts of titanium gypsum; 15-25 parts of aluminoferrite cement clinker; The novel low-calcium clinker comprises the following mineral compositions in percentage by mass, wherein the sum of the mineral compositions in percentage by mass is 100 percent, and the novel low-calcium clinker comprises the following components in percentage by mass: 40% -50% dicalcium silicate; 25% -30% of calcium sulfoaluminate; 3% -8% of calcium sulfosilicate; 3% -8% of tetracalcium aluminoferrite; 8% -15% of calcium sulfate; 1% -5% of free calcium oxide.
  2. 2. The special cementing material for the anti-corrosion concrete, as set forth in claim 1, wherein the sugar residue is fiber residue remained after sugar cane or beet is squeezed to extract sugar juice, the water content is less than 10%, the length is 10-30mm, the length-diameter ratio is 50-150, and the cellulose content is more than 50%.
  3. 3. The special cementing material for the anti-corrosion concrete, as set forth in claim 1, wherein the tailings are aphanitic graphite flotation tailings, and the water content of the tailings is less than 5%.
  4. 4. The special cementing material for the anti-corrosion concrete, as claimed in claim 1, wherein the water reducer is a polycarboxylic acid high-performance water reducer, and the water reduction rate is more than 25%.
  5. 5. A special cementing material for anti-corrosion concrete according to any one of claims 1 to 4, wherein the slag is zinc, aluminum or magnesium smelting slag.
  6. 6. The special cementing material for anti-corrosion concrete of claim 5, wherein the slag is zinc-smelting slag.
  7. 7. The special cementing material for the anti-corrosion concrete, as set forth in claim 1, wherein the white mud is solid waste produced by the paper industry, the calcium carbonate content is more than 90%, and the sodium hydroxide content is more than 0.3%.
  8. 8. A special cementing material for anti-corrosion concrete according to claim 1, wherein the micro plastic is prepared by crushing processed plastic waste into fine particles with the particle size of 0.5-5mm.
  9. 9. The special cementing material for anti-corrosion concrete of claim 1, wherein the titanium gypsum is a solid waste associated with the titanium pigment industry, and the content of calcium sulfate dihydrate is more than 90%.
  10. 10. The special cementing material for the anti-corrosion concrete, as set forth in claim 1, wherein the aluminoferrite cement clinker is aluminoferrite cement clinker conforming to GB/T45920-2025 standard aluminoferrite cement, and has an iron oxide content of >7% and an aluminum oxide content of >25%.
  11. 11. The method for preparing the special cementing material for the anti-corrosion concrete according to any one of the claims 1 to 10, which is characterized by comprising the following steps, S1, weighing sugar slag and white mud according to parts by weight, fully mixing the sugar slag and the white mud, and drying at a low temperature after fully reacting to obtain a material A; S2, weighing titanium gypsum, slag and novel low-calcium clinker according to parts by weight, grinding together with the material A obtained in the step S1, and controlling the specific surface area to be 380-420m 2 /kg to obtain a material B; S3, weighing tailings and a water reducer according to parts by weight, grinding and controlling the specific surface area to be 550-620m 2 /kg to obtain a material C; S4, weighing microplastic and aluminoferrite cement clinker according to the parts by weight, grinding and controlling the specific surface area to be 230-280m 2 /kg to obtain a material D; s5, uniformly mixing the material B, the material C and the material D to obtain the special cementing material for the anti-corrosion concrete.

Description

Special cementing material for anti-corrosion concrete and preparation method thereof Technical Field The invention relates to the technical field of building materials, in particular to a special cementing material for anti-corrosion concrete and a preparation method thereof. Background Concrete is currently the most widely used building material worldwide, and its durability directly determines the safe service period and full life cycle economic cost of infrastructure. Under multiple severe working conditions such as marine environment corrosion, deicing salt effect, acid soil corrosion, industrial pollution and the like, steel bar corrosion and matrix degradation in a concrete structure become the primary causes of performance attenuation and early failure. Currently, the degree of dependence of economic development on maritime trade and coastal area construction continues to rise, and research and development of protective concrete technology with excellent durability and corrosion resistance has become a core focus of common attention of the building material field academy and industry. The technology takes industrial solid waste as all raw materials, thereby saving natural mineral resources, reducing ecological damage caused by mining, solidifying toxic and harmful ions in the solid waste in the concrete, realizing the recycling of the solid waste, and having the advantages of high utilization rate of the solid waste and excellent mechanical property and corrosion resistance. However, in order to ensure the anti-corrosion effect, a large amount of trisiloxane preservative is required to be added, so that the comprehensive cost is increased, meanwhile, the overall water-gel ratio is higher, the internal pores formed after hydration reaction are still anti-corrosion weak links, and the technical problem of low cost and long-acting anti-corrosion cannot be fundamentally solved. In another example, the invention patent application with the application publication number of CN120841913A discloses a high-performance anti-corrosion concrete for ocean engineering and a preparation method thereof, and the chloride ion permeability and sulfate corrosion resistance of the concrete are improved by optimizing a formula, so that the structural stability and the service life of the concrete in an ocean environment are enhanced. On the one hand, the technology relies on the compactness of the sulphoaluminate cement, and a large amount of preservative is added to strengthen the anti-corrosion effect, while the sulphoaluminate cement is not resistant to carbonization, which is common knowledge in the field, on the other hand, the sulphoaluminate cement hydration product is weak in alkalinity, the activity of the admixture such as fly ash, silica fume and the like cannot be fully excited, the later-stage strength of the concrete is insufficient, the durability decay is rapid, and the long-term anti-corrosion aim is difficult to realize. And as the application publication number is CN119100641A, the invention discloses an anti-corrosion concrete additive and a preparation method thereof, wherein the additive improves the comprehensive performance of concrete through the multi-component synergistic effect, fly ash fills the internal pores to optimize the microstructure, modified plant fibers strengthen the mechanical property and the crack resistance, the amphoteric polycarboxylate water reducer combines the workability and the formation of a reinforcing steel bar surface protection film, and inorganic salt further improves the anti-permeability capability. However, the core of the technology depends on a single action path of the preservative, the preservative lifting effect is limited, the ion erosion resistance is easy to deteriorate in the long-term service process, and the long-term preservative requirement in a severe environment is difficult to meet. In summary, the research focus of the prior art (including but not limited to the above patent) is mainly on single dimension such as optimization of concrete mix ratio, research and development of anti-corrosion additives, and the like, and common defects of single function, isolated mechanism and passive defense are commonly existed. These techniques either focus on the dense packing of the internal pores only, or enhance the corrosion protection function alone, or focus on shrinkage compensation issues only, failing to organically coordinate and integrate multiple corrosion protection mechanisms. Therefore, developing a special cementing material integrating multiple protection mechanisms to fundamentally solve the corrosion problem of concrete has become an urgent need and an important development direction for technological breakthrough in the field. Disclosure of Invention In order to overcome the defects and the shortcomings in the prior art, the invention provides a special cementing material for anti-corrosion concrete and a preparation method thereof, and ai