Barium slag-modified aluminate quick-hardening special cementing material and preparation method thereof

Patent metadata

Field	Value
Publication number	US-11945752-B1
Application number	US-202318487622-A
Country	US
Kind code	B1
Filing date	Oct 16, 2023
Priority date	Oct 26, 2022
Publication date	Apr 2, 2024
Grant date	Apr 2, 2024

Abstract

Disclosed are a barium slag-modified aluminate quick-hardening special cementing material and a preparation method thereof, wherein the raw materials for the preparation of the barium slag-modified aluminate quick-hardening special cementing material includes, in parts by weight: 10-12 parts of aluminate cement clinker, 2-3 parts of barium slag powder, 1.5-2 parts of sulfate material, and 0-1.5 parts of early-setting agent. The present invention, on the basis of ensuring the original advantages of aluminate cement, can increase the long-term strength, durability, and economy, and solve the possible environmental problems caused by the barium slag, making it more suitable for use in various engineering projects.

First claim

What is claimed is:

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 Ba 2+ in the barium slag powder to a molar mass of SO 4 2− +PO 4 3− 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 Ba 2+ 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.

2. A method for preparing a barium slag-modified aluminate quick-hardening cementing material, comprising:
mixing, in parts by weight, 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, and then adding water and stirring until uniform to obtain the barium slag-modified aluminate quick-hardening cementing material, 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; and
wherein a mass ratio of the added water to solid components is 0.3-0.5.

Assignees

• Inst Rock & Soil Mech Cas

Inventors

• Li Jiangshan
• Xue Qiang
• Chen Xin

Classifications

• C04B28/143 Primary

  the synthetic calcium sulfate being phosphogypsum · CPC title

• C04B18/141

  Slags · CPC title

• C04B2103/12

  Set accelerators · CPC title

• Y02P40/10

  Production of cement, e.g. improving or optimising the production methods; Cement grinding · CPC title

• C04B18/0481 Primary

  Other specific industrial waste materials not provided for elsewhere in C04B18/00 · CPC title