Method for preparing large-admixture-amount wet-milled phosphorus solid waste super-retarding cementing material

A cementitious material and ultra-retarding technology, which is applied in the field of building materials, can solve the problem of only 28-day strength, achieve high strength in the later stage, increase the dosage, and have obvious effects

Active Publication Date: 2019-12-03
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the coagulation time of this invention is more than 60h, its 28-day strength is only 28MPa

Method used

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  • Method for preparing large-admixture-amount wet-milled phosphorus solid waste super-retarding cementing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 1) Take 200 parts by weight of phosphorus slag and send 20 parts of desulfurization ash into a wet ball mill, add water according to the ratio of water to material mass ratio of 0.4, and obtain mixed slurry A;

[0039] The average particle size of the mixed slurry A is 4 μm;

[0040] 2) Take 5 parts by weight of alkali slag, 2 parts of phosphogypsum, and 4 parts of fly ash and grind them with a dry mill to obtain a mixed powder material B;

[0041] The average particle size of the mixed powder material B is 9 μm;

[0042] 3) Mix the mixed slurry A with the mixed powder material B to obtain the mixed material C, add 5 parts of cement, 0.5 parts of water-soluble resin sulfonate water reducing agent, 0.5 parts of sodium pyrophosphate, 150 1 part of tailings sand, 300 parts of gravel, stirred for 4 minutes to obtain super retarded concrete;

[0043] The phosphorus slag P 2 o 5 The content of F is 2.5%, and the content of F is 1.9%.

Embodiment 2

[0045] 1) Take 230 parts by weight of phosphorus slag and 25 parts of desulfurized ash and send them into a wet ball mill, add water according to the ratio of water to material mass ratio of 0.4, and obtain mixed slurry A;

[0046] The average particle size of the mixed slurry A is 3.2 μm;

[0047] 2) Take 7 parts by weight of alkali slag, 8 parts of phosphogypsum, and 10 parts of fly ash and grind them with a dry mill to obtain a mixed powder material B;

[0048] The average particle size of the mixed powder material B is 8.5 μm;

[0049] 3) Mix the mixed slurry A with the mixed powder material B to obtain the mixed material C, add 10 parts of cement, 0.5 parts of water-soluble resin sulfonate water reducing agent, 0.5 parts of sodium pyrophosphate, 0.5 1 part of phosphate, 100 parts of tailings sand, 250 parts of gravel, and stirred for 4 minutes to obtain super retarded concrete.

[0050] The phosphorus slag P 2 o 5 The content of F is 3%, and the content of F is 2.4%. ...

Embodiment 3

[0052] 1) Take 260 parts by weight of phosphorus slag and 25 parts of desulfurization ash and send them into a wet ball mill, add water according to the ratio of water to material mass ratio of 0.45, and obtain mixed slurry A;

[0053] The average particle size of the mixed slurry A is 2.4 μm;

[0054] 2) Take 10 parts by weight of alkali slag, 8 parts of phosphogypsum, and 8 parts of fly ash and grind them with a dry mill to obtain a mixed powder material B;

[0055] The average particle size of the mixed powder material B is 7 μm;

[0056] 3) Mix the mixed slurry A with the mixed powder material B to obtain the mixed material C, add 15 parts of cement, 0.5 parts of water-soluble resin sulfonate water reducer, 0.7 parts of phosphate, 200 parts of Tailings sand, 400 parts of gravel, stirred for 4 minutes to obtain super retarded concrete.

[0057] The phosphorus slag P 2 o 5 The content of F is 3.5%, and the content of F is 2.9%;

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Abstract

The invention discloses a method for preparing a large-admixture-amount wet-milled phosphorus solid waste super-retarding cementing material. The method comprises the following steps: putting phosphorus slag and desulfurized fly ash into a wet-milling machine, and performing mixing and wet milling so as to obtain mixed slurry A; grinding caustic dross, ardealite and coal ash in a dry-milling machine so as to obtain a mixed powder material B; and mixing the mixed slurry A with the mixed powder material B so as to obtain a mixed material C, adding cement, a water reduction agent, a retarder, tailing sand and macadam into the mixed material C, and performing stirring for 4 minutes, so as to obtain super-retarding concrete. Wastes such as the phosphorus slag, desulfurized fly ash, caustic dross, ardealite, coal ash and tailings are adopted to prepare concrete, wastes are turned into wealth, and the amount of cement can be also reduced; due to a mixed wet-milling mode of the phosphorus slagand the desulfurized fly ash, phosphorus dissolution of the phosphorus slag can be promoted, the initial setting time and the final setting time of the concrete can be greatly prolonged, early-stagehydration heat can be reduced, cracks can be reduced, later strength can be ensured, and large-admixture-amount efficient application of the phosphorus slag can be achieved; and the prepared super-retarding concrete can be applied to large-size concrete, drilling bitten piles, and the like.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a method for preparing a large-volume wet-grinding phosphorus solid waste ultra-retarding gelling material. Background technique [0002] There are a lot of phosphate rock resources in nature, which can be used to produce phosphoric acid by wet method. In the process of phosphoric acid production by wet method, industrial waste residues such as phosphorus slag and phosphogypsum will be discharged; on the other hand, mineral processing will also produce a large amount of phosphorus tailings. Most phosphorus solid wastes are stacked in the open air, which not only occupies a large amount of land resources, but also contains phosphorus, fluorine and organic matter, which are washed by rainwater and seriously pollute nearby soil and water resources. Therefore, the effective utilization of phosphorus solid waste has extremely important environmental protection significance. [0003...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B22/00C04B103/22
CPCC04B22/0006C04B28/00C04B2103/22C04B2103/302C04B18/12C04B14/02
Inventor 贺行洋王庭苇苏英王迎斌杨进曾三海陈顺张明郑正旗徐焰蒋健
Owner HUBEI UNIV OF TECH
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