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CN-121990771-A - High-melting Dan Tie aluminate cement material and preparation method thereof

CN121990771ACN 121990771 ACN121990771 ACN 121990771ACN-121990771-A

Abstract

The invention relates to the technical field of cement materials, and particularly discloses a high-melting Dan Tie aluminate cement material and a preparation method thereof. The cement material is prepared by grinding high belite sulphoaluminate cement clinker and a modifier together. The modifier consists of succinyl phosphonate, quaternary ammonium salt and an aluminum source. The molecular formula of the succinyl phosphonate is HOOC-CH 2 -CH 2 -CO(PO 3 H 2 ). The invention utilizes the modifier composed of succinyl phosphonate, quaternary ammonium salt and aluminum source to carry out mechanochemical coupling modification on the belite sulphoaluminate cement clinker, and multi-level interface interaction occurs under the induction of mechanical force, thereby realizing the directional poisoning and growth inhibition of ettringite crystal nucleus, and obviously improving the volume stability of the cement material while maintaining the early strength of the cement.

Inventors

  • HUANG YONGBO
  • LI XINGYU
  • LI ZHEN
  • CHEN FANGYU
  • YU LIANG
  • DING JIAN

Assignees

  • 济南大学

Dates

Publication Date
20260508
Application Date
20260408

Claims (10)

  1. 1. The high-mineral-melting Dan Tie aluminate cement material is characterized by being prepared by grinding high belite sulphoaluminate cement clinker and a modifier, wherein the modifier consists of succinyl phosphonate, quaternary ammonium salt and an aluminum source according to the mass ratio of 1:0.1-0.5:0.2-0.8, and the structural formula of the succinyl phosphonate is shown as the formula (1): ; formula (1).
  2. 2. The high ore melting Dan Tie aluminate cement material according to claim 1, wherein the high belite sulphoaluminate cement clinker comprises 35-50 parts by weight of anhydrous calcium sulphoaluminate, 25-40 parts by weight of dicalcium silicate, 10-20 parts by weight of tetracalcium aluminoferrite and 5-10 parts by weight of dicalcium ferrite.
  3. 3. The high melting Dan Tie aluminate cement material according to claim 1, wherein the quaternary ammonium salt comprises at least one of cetyltrimethylammonium bromide, octadecyltrimethylammonium chloride, dioctadecyl dimethylammonium chloride.
  4. 4. The high melting Dan Tie aluminate cement material of claim 1, wherein the aluminum source comprises at least one of bauxite, boehmite, pseudoboehmite.
  5. 5. The high melting Dan Tie aluminate cement material according to claim 4, wherein the bauxite comprises at least one of gibbsite and diaspore.
  6. 6. The high mine fused Dan Tie aluminate cement material according to any one of claims 1 to 5, wherein the modifier is 0.5 to 3% of the mass of the high belite sulphoaluminate cement clinker.
  7. 7. The method for preparing the high-mine-melting Dan Tie aluminate cement material as claimed in any one of claims 1 to 6, which is characterized by comprising the following steps: (1) Mixing the succinyl phosphonate, the quaternary ammonium salt and the aluminum source, and then performing pre-grinding treatment to obtain a modifier; (2) And mixing the high belite sulphoaluminate cement clinker with the modifier, and grinding to obtain the high-mineral-content Dan Tie aluminate cement material.
  8. 8. The method for preparing the high-melting Dan Tie aluminate cement material according to claim 7, wherein in the step (1), the rotation speed of the pre-grinding treatment is 200-400 r/min, and the grinding time is 15-30 min.
  9. 9. The method for preparing the high-melting Dan Tie aluminate cement material according to claim 7, wherein in the step (2), the rotation speed of the grinding treatment is 400-700 r/min, the grinding time is 30-120 min, or in the step (2), the environmental temperature is controlled to be less than or equal to 50 ℃.
  10. 10. The method for preparing high-melting Dan Tie aluminate cement material according to claim 7, wherein in the step (2), the fineness of the high-melting Dan Tie aluminate cement material is 300-500 meshes.

Description

High-melting Dan Tie aluminate cement material and preparation method thereof Technical Field The invention relates to the technical field of cement materials, in particular to a high-mine-melting Dan Tie aluminate cement material and a preparation method thereof. Background The disclosure of this background section is only intended to increase the understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art already known to those of ordinary skill in the art. The high belite sulphoaluminate cement is a novel low-carbon gelling material taking anhydrous calcium sulphoaluminate and dicalcium silicate (C 2 S) as dominant minerals, has the advantages of quick hardening, early strength, micro expansion, corrosion resistance, low carbon emission and the like, and is widely applied to the fields of rush repair and rush construction engineering, ocean engineering, mass concrete and the like. However, in the hydration hardening process of high belite sulphoaluminate cement, anhydrous calcium sulphoaluminate reacts with gypsum to generate a large amount of ettringite (AFt), and although a proper amount of ettringite can provide early strength and compensate shrinkage, excessive or delayed generation of ettringite tends to cause volume expansion, microcrack expansion and even structural damage of cement stones. At present, the method for inhibiting the overgrowth of ettringite mainly comprises (1) reducing the content of anhydrous calcium sulfoaluminate in cement clinker, (2) doping mineral admixtures (such as fly ash, slag and the like), and (3) introducing inorganic salt inhibitors (such as barium salt, lithium salt and the like). However, decreasing the calcium sulfoaluminate anhydrous content affects the early strength development of cement, the mineral admixture has insufficient activity, slow action and limited early ettringite inhibition effect, while the inorganic salt inhibitor can inhibit ettringite generation by precipitating sulfate radical or complex calcium ions, but has the problems of high dosage, easy elution, uneven distribution and the like, and other harmful side reactions may be introduced, resulting in the performance degradation of cement materials. Disclosure of Invention Aiming at the problems, the invention provides a high-mineral-content Dan Tie aluminate cement material and a preparation method thereof, which can not only effectively inhibit excessive formation of ettringite, but also maintain the development of early strength of cement, thereby realizing the purpose of remarkably improving the volume stability while maintaining the early strength of cement. Specifically, the technical scheme of the invention is as follows. Firstly, the invention discloses a high-mineral-content Dan Tie aluminate cement material, which is prepared by grinding high belite sulphoaluminate cement clinker and a modifier together. The modifier consists of succinyl phosphonate, quaternary ammonium salt and an aluminum source. The molecular formula of the succinyl phosphonate is HOOC-CH 2-CH2-CO(PO3H2, and the structural formula is shown as the following formula (1). ; Formula (1). Further, the high belite sulphoaluminate cement clinker comprises, by weight, 35-50 parts of anhydrous calcium sulphoaluminate, 25-40 parts of dicalcium silicate (C 2 S), 10-20 parts of tetracalcium aluminoferrite (C 4 AF) and 5-10 parts of dicalcium ferrite (C 2 F). Further, the mass ratio of the succinyl phosphonate, the quaternary ammonium salt and the aluminum source is 1:0.1-0.5:0.2-0.8. Further, the quaternary ammonium salt comprises at least one of cetyl trimethyl ammonium bromide, stearyl trimethyl ammonium chloride, dioctadecyl dimethyl ammonium chloride and the like. Further, the aluminum source includes at least one of aluminum stone, boehmite, pseudo-boehmite, and the like. Optionally, the bauxite includes at least one of gibbsite, diaspore, and the like. Further, the modifier is 0.5-3% of the mass of the high belite sulphoaluminate cement clinker. Secondly, the invention discloses a preparation method of the high-melting Dan Tie aluminate cement material, which comprises the following steps: (1) And mixing the succinyl phosphonate, the quaternary ammonium salt and the aluminum source, and then performing pre-grinding treatment to obtain the modifier. (2) And mixing the high belite sulphoaluminate cement clinker with the modifier, and grinding to obtain the high-mineral-content Dan Tie aluminate cement material. Further, in the step (1), the rotation speed of the pre-grinding treatment is 200-400 r/min, and the grinding time is 15-30 min. Further, in the step (2), the rotation speed of the grinding treatment is 400-700 r/min, and the grinding time is 30-120 min. Further, in the step (2), the ambient temperature is controlled to be less than or equal to 50 ℃ in the grinding treatment process. Further, in the