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Special curing agent for low-strength solidified soil and preparation method thereof

A technology of solidifying soil and curing agent, which is applied in the field of low-strength solidifying soil special curing agent and its preparation, to achieve the effect of improving mechanical properties, good economic benefits and environmental protection benefits

Inactive Publication Date: 2019-12-27
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to some data, my country's proven reserves of high-grade limestone can only meet the production needs of the cement industry for more than 30 years.

Method used

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  • Special curing agent for low-strength solidified soil and preparation method thereof
  • Special curing agent for low-strength solidified soil and preparation method thereof
  • Special curing agent for low-strength solidified soil and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A special curing agent for low-strength solidified soil, comprising the following raw materials according to weight percentage:

[0038] 74wt% special clinker for low-grade solidified soil, 25wt% desulfurized gypsum, and 1.0wt% grinding aid.

[0039] The special clinker for low-grade solidified soil is composed of alkali slag, engineering spoil and iron ore, and C in its mineral composition 3 S content is 40wt%, C 2 S content is 25wt%, C 3 A content is 12wt%, C 4 The AF content is 20 wt%.

[0040] The content of CaO in the alkali slag is 45wt%, SiO 2 Content is 10wt%, Al 2 o 3 The content is 4wt%; SiO in the engineering spoil 2 Content is 50wt%, Al 2 o 3The content is 25wt%, Fe 2 o 3 The content is 5wt%; Fe in the iron ore 2 o 3 The content is 58wt%. The specific chemical composition is shown in Table 1.

[0041] Table 1 Chemical Analysis of Raw Materials

[0042] name SiO 2 / %

Al 2 o 3 / %

Fe 2 o 3 / %

CaO / % MgO / % SO ...

Embodiment 2

[0050] A special curing agent for low-strength solidified soil, comprising the following raw materials according to weight percentage:

[0051] 84wt% special clinker for low-grade solidified soil, 15wt% desulfurized gypsum, and 1.0wt% grinding aid.

[0052] Wherein, the special clinker for low-grade solidified soil is composed of alkali slag, engineering spoil and iron ore, and C in its mineral composition 3 S content is 50wt%, C 2 S content is 20wt%, C 3 A content is 10wt%, C 4 The AF content is 15 wt%.

[0053] CaO content in the alkali slag is 55wt%, SiO 2 Content is 8wt%, Al 2 o 3 The content is 8wt%; SiO in the engineering spoil 2 The content is 70wt%, Al 2 o 3 Content is 15wt%, Fe 2 o 3 The content is 6wt%; Fe in the iron ore 2 o 3 The content is 60wt%. The specific chemical composition is shown in Table 2.

[0054] Table 2 Chemical Analysis of Raw Materials

[0055] name SiO 2 / %

Al 2 o 3 / %

Fe 2 o 3 / %

CaO / % MgO / % SO...

Embodiment 3

[0063] A special curing agent for low-strength solidified soil, comprising the following raw materials according to weight percentage:

[0064] 83.5wt% special clinker for low-grade solidified soil, 16wt% desulfurized gypsum, and 0.5wt% grinding aid.

[0065] Wherein, the special clinker for low-grade solidified soil is composed of alkali slag, engineering spoil and iron ore, and C in its mineral composition 3 S content is 45wt%, C 2 S content is 22wt%, C 3 A content is 15wt%, C 4 The AF content was 17 wt%.

[0066] CaO content in the alkali slag is 50wt%, SiO 2 Content is 9wt%, Al 2 o 3 The content is 6wt%; SiO in the engineering spoil 2 The content is 60wt%, Al 2 o 3 Content is 20wt%, Fe 2 o 3 The content is 15wt%; Fe in the iron ore 2 o 3 The content is 62wt%. The specific chemical composition is shown in Table 3.

[0067] Table 3 Chemical Analysis of Raw Materials

[0068] name SiO 2 / %

Al 2 o 3 / %

Fe 2 o 3 / %

CaO / % MgO / %...

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Abstract

The invention relates to a special curing agent for low-strength solidified soil and a preparation method thereof. The curing agent comprises the following components in percentage by weight: 74-84% of special clinker for low-grade solidified soil, 15-25% of desulfurized gypsum and 0.5-1.0% of a grinding aid, wherein the special clinker for the low-grade solidified soil comprises a calcium carbonate raw material that is alkaline residues, a clay raw material that is engineering spoil and a correction raw material that is iron ore. The preparation method comprises the following steps: 1) pretreating the calcium carbonate raw material, and homogenizing the pretreated calcium carbonate raw material, the clay raw material and the correction raw material; 2) blending the homogenized calcium carbonate raw material, the clay raw material and the correction raw material, and grinding the mixture to obtain raw material powder; 3) adding a mineralizer into the raw material powder, calcining themixture, and quenching to room temperature to obtain special clinker for the low-grade solidified soil; 4) adding the desulfurized gypsum and the grinding aid into the special clinker for the low-grade solidified soil, and grinding the mixture to obtain the special curing agent. According to the curing agent and the method, industrial solid waste and engineering spoil are combined, so that the curing agent has remarkable economical efficiency and environmental friendliness, and is a new way for resource utilization of the industrial solid waste and the engineering spoil.

Description

technical field [0001] The invention relates to a special curing agent for low-strength curing soil and a preparation method thereof, belonging to the field of curing agents for curing soil. Background technique [0002] Cement is a kind of cementitious material that can harden in both air and water. It is widely used in civil engineering, water conservancy, national defense and other projects, and is known as "grey gold". Tracing its development history, it can be found that its essence is designed based on mineral components. It has gone through multiple stages such as natural clay, gypsum-lime, lime-volcanic ash and artificially configured cement. The basic principle is to use the calcium phase in the material. , silicon phase, aluminum phase, and iron phase interact with water to form cementing / filling substances. The difference is that the activity of each phase in each material is different. The various promotion measures currently used are also based on improving the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14
CPCC04B28/144C04B2111/00732C04B2201/50C04B14/10C04B18/0481C04B14/308C04B2103/52
Inventor 邓永锋吴军陈琦刘丽邓祖华
Owner SOUTHEAST UNIV