	US 11,945,752 B1
	Barium slag-modified aluminate quick-hardening special cementing material and preparation method thereof
Jiangshan Li, Wuhan (CN); Qiang Xue, Wuhan (CN); and Xin Chen, Wuhan (CN)
Assigned to Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan (CN)
Filed by Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan (CN)
Filed on Oct. 16, 2023, as Appl. No. 18/487,622.
Claims priority of application No. 202211320649.2 (CN), filed on Oct. 26, 2022.
Int. Cl. C04B 28/14 (2006.01); C04B 18/14 (2006.01); C04B 103/12 (2006.01)

CPC C04B 28/143 (2013.01) [C04B 18/141 (2013.01); C04B 2103/12 (2013.01)]

2 Claims

1. A barium slag-modified aluminate quick-hardening cementing material, comprising, in parts by weight, following raw materials for preparation of the barium slag-modified aluminate quick-hardening cementing material: 10-12 parts of aluminate cement clinker, 2-3 parts of barium slag powder, 1.5-2 parts of sulfate material, and an early-setting agent; wherein the early-setting agent is present in an amount greater than zero and up to 1.5 parts and wherein the sulfate material and the early setting agent are different;

the sulfate material includes at least one of sodium sulfate, calcium sulfate, aluminum sulfate, potassium sulfate, phosphogypsum, and celestite;

the early-setting agent comprises at least one of calcium hydroxide, sodium hydroxide, sodium carbonate, sodium sulfate, quicklime, and carbide slag;

a mass proportion of tricalcium aluminate in the aluminate cement clinker is 20-40 wt %;

a ratio of a molar mass of Ba²⁺ in the barium slag powder to a molar mass of SO₄²⁻+PO₄³⁻ ions in the sulfate material is 1:1;

wherein a method for preparing the barium slag powder comprises:

obtaining a black barium slag powder satisfying that according to GB 5085.3-2007 test, a leaching concentration of Ba²⁺ from the black barium slag powder in an acidic solution with a liquid-solid ratio of 10:1 is 1500-2300 mg/L; and

subjecting the black barium slag powder to calcining at 800-1200° C., a ball milling and passing through a 200-mesh sieve to obtain the barium slag powder.