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Sulphate corrosion resistant curing agent for marine facies sludge curing

An anti-sulfate and curing agent technology, applied in the direction of dehydration/drying/thickened sludge treatment, etc., can solve problems affecting curing strength and durability, structural expansion, and erosion of solidified soil, so as to prevent seawater erosion and reduce Effect of porosity, increased strength and compactness

Inactive Publication Date: 2018-04-20
福建港湾岩土工程集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The content of chloride salt, sulfate, magnesium salt, etc. in the marine environment is generally high, which is easy to cause erosion to the solidified soil, and the formation of ettringite and magnesium minerals will cause the structure to expand, crack, and disintegrate, affecting its solidification strength and durability.

Method used

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  • Sulphate corrosion resistant curing agent for marine facies sludge curing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A kind of anti-sulphate corrosion curing agent for solidification of marine phase silt, in parts by weight, said curing agent is made of the following raw materials:

[0024] P.O 42.5 Portland cement: 2.3 parts;

[0025] S95 granulated blast furnace slag: 2.4 parts;

[0026] CL90 quicklime: 1.0 parts;

[0027] F.II grade fly ash: 1.8 parts;

[0028] Early strength enhancer: 1.0 parts;

[0029] Natural dihydrate gypsum: 0.1 parts;

[0030] Liquid stimulant: 0.2 parts.

[0031] The early-strength enhancer is made of silicon micropowder, calcium-based bentonite and metakaolin mixed in a mass ratio of 5:2:3, calcined at 800°C and ground to a specific surface area of ​​400m 2 / g of powder.

[0032] The liquid activator is a composite liquid prepared by mixing silica sol, polyacrylamide and triethanolamine in a mass ratio of 2:2:1, and stirring at a constant temperature of 80°C for 30 minutes.

Embodiment 2

[0034] A kind of anti-sulphate corrosion curing agent for solidification of marine phase silt, in parts by weight, said curing agent is made of the following raw materials:

[0035] P.O 42.5 Portland cement: 2.7 parts;

[0036] S95 granulated blast furnace slag: 2.9 parts;

[0037] CL90 quicklime: 1.5 parts;

[0038] F.II class fly ash: 2.4 parts;

[0039] Early strength enhancer: 1.5 parts;

[0040] Natural dihydrate gypsum: 0.3 parts;

[0041] Liquid stimulant: 0.5 parts.

[0042] The early-strength enhancer is made of silicon micropowder, calcium-based bentonite and metakaolin mixed in a mass ratio of 5:2:3, calcined at 800°C and ground to a specific surface area of ​​400m 2 / g of powder.

[0043] The liquid activator is a composite liquid prepared by mixing silica sol, polyacrylamide and triethanolamine in a mass ratio of 2:2:1, and stirring at a constant temperature of 80°C for 30 minutes.

Embodiment 3

[0045] A kind of anti-sulphate corrosion curing agent for solidification of marine phase silt, in parts by weight, said curing agent is made of the following raw materials:

[0046] P.O 42.5 Portland cement: 2.5 parts;

[0047] S95 granulated blast furnace slag: 2.6 parts;

[0048] CL90 quicklime: 1.3 parts;

[0049] F.II class fly ash: 2.1 parts;

[0050] Early strength enhancer: 1.2 parts;

[0051] Natural dihydrate gypsum: 0.2 parts;

[0052] Liquid stimulant: 0.3 parts.

[0053] The early-strength enhancer is made of silicon micropowder, calcium-based bentonite and metakaolin mixed in a mass ratio of 5:2:3, calcined at 800°C and ground to a specific surface area of ​​400m 2 / g of powder.

[0054] The liquid activator is a composite liquid prepared by mixing silica sol, polyacrylamide and triethanolamine in a mass ratio of 2:2:1, and stirring at a constant temperature of 80°C for 30 minutes.

[0055] Construction application:

[0056] (1) Mix uniformly according to ...

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Abstract

The invention discloses a sulphate corrosion resistant curing agent for marine facies sludge curing. The curing agent is prepared from the following raw materials in parts by weight: 2.3 to 2.7 partsof Portland cement, 2.4 to 2.9 parts of S95 granulated blast furnace mineral waste residues, 1.0 to 1.5 parts of quicklime, 1.8 to 2.4 parts of fly ash, 1.0 to 1.5 parts of early strengthening agents,0.1 to 0.3 part of gypsum and 0.2 to 0.5 part of liquid excitants. By reducing the cement mixing quantity and increasing the mixing quantity of granulated blast furnace mineral waste residue and flyash, the activity of the fly ash and blast furnace mineral waste residue powder is excited through the dual effects of early strengthening agents and liquid excitants; the intensity and the compactness of the curing soil are improved; the porosity is reduced; the formation of a water passage is prevented; in addition, a hydrophobe layer is formed in the soil body; the seawater erosion can be effectively prevented; the curing soil intensity and stability are improved.

Description

technical field [0001] The invention relates to a sulfate corrosion-resistant curing agent used for solidifying marine phase sludge, belonging to the field of sludge curing agents. Background technique [0002] Dredging mud is a kind of waste with high water content produced in large quantities in port maintenance and coastal engineering. limits. The solidification method is an effective dredging mud resource treatment method. The dredged silt can be converted into geotechnical materials through solidification treatment, which can not only solve the environmental hazards of silt waste, but also make the soil produced by silt solidification treatment (silt solidified soil) Filling materials used in roads, embankments, and sea reclamation projects can also generate new geotechnical renewable resources, which is of great significance to the sustainable development of society. [0003] The content of chloride salt, sulfate, and magnesium salt in the marine environment is gener...

Claims

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Application Information

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IPC IPC(8): C04B28/04C02F11/14
CPCC02F11/14C04B28/04C04B2111/00767C04B18/142C04B22/064C04B18/08C04B2103/0068C04B22/143
Inventor 陈建康肖颖梅丰陆伟
Owner 福建港湾岩土工程集团有限公司
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