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Curing agent for deeply stirring mucky soil as well as preparation method and use method thereof

A muddy soil, deep mixing technology, applied in chemical instruments and methods, sludge treatment, solid waste management, etc., can solve the problems of long consolidation time, not widely recycled, low resource utilization, etc., to achieve Improving curing strength and impermeability, rapidly increasing curing strength, and improving curing strength

Active Publication Date: 2021-10-19
FOSHAN TRANSPORTATION SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional cement mixing piles usually use cement as a curing agent to harden soft soil to improve foundation strength. However, soft soil has the characteristics of high water content, large void ratio, low strength, large deformation, and long consolidation time. The cement hydrates in the soil. The environment is harsh, it is difficult to form dense and stable gelling hydration products, and there is a serious shortage of strength, resulting in a relatively short effective pile length, making it difficult to achieve a good pile-forming effect
Cement has poor or no effect in strengthening soils with high moisture content
[0004] On the other hand, paper mills will produce a large amount of lime mud waste in the causticizing process. The amount of lime mud produced by papermaking in my country is about 3 million tons per year, and the current resource utilization is not high.
Due to the advantages of environmental protection and good safety, magnesium-based inorganic cementitious materials have been widely used in the construction industry in recent years. However, during the production process of magnesium-based decorative panels, a large amount of waste will be generated due to cutting, polishing and other processes. At present, it is mainly piled up anywhere, and has not been widely recycled.

Method used

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  • Curing agent for deeply stirring mucky soil as well as preparation method and use method thereof
  • Curing agent for deeply stirring mucky soil as well as preparation method and use method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] The present embodiment provides a kind of solidifying agent that is used for deep stirring muddy soil, and its formula is as follows:

[0067] 30 parts of PO42.5 cement, 40 parts of papermaking lime mud, and 30 parts of magnesium-based material waste.

[0068] Among them, the chemical composition of papermaking white mud is:

[0069] SiO 2 6.21wt%, K 2 O 3.16wt%, CaO 60.52wt%, MgO 0.85wt%, Al 2 o 3 5.25wt%, Fe 2 o 3 1.21wt%, LOI 22.8wt%.

[0070] The chemical composition of magnesium-based substrate waste is:

[0071] SiO 2 2.41 wt%, CaO 0.1 wt%, MgO 44.72wt%, SO 3 0.52wt%, LOI 52.25wt%.

Embodiment 2

[0073] The present embodiment provides a kind of solidifying agent that is used for deep stirring muddy soil, and its formula is as follows:

[0074] 30 parts of PO42.5 cement, 40 parts of papermaking lime mud, and 30 parts of magnesium-based material waste.

[0075] Among them, the chemical composition of papermaking white mud is:

[0076] SiO 2 6.21wt%, K 2 O 3.16wt%, CaO 60.52wt%, MgO 0.85wt%, Al 2 o 3 5.25wt%, Fe 2 o 3 1.21wt%, LOI 22.8wt%.

[0077] The chemical composition of magnesium-based substrate waste is:

[0078] SiO 2 10.15 wt%, CaO 6.56 wt%, MgO 41.82wt%, Al 2 o 3 4.05wt%, Fe 2 o 3 2.47wt%, LOI34.95%.

Embodiment 3

[0080] The present embodiment provides a kind of solidifying agent that is used for deep stirring muddy soil, and its formula is as follows:

[0081] 30 parts of PO42.5 cement, 40 parts of papermaking lime mud, and 30 parts of magnesium-based material waste.

[0082] Among them, the chemical composition of papermaking white mud is:

[0083] SiO 2 8.64wt%, CaO 50.18wt%, MgO 3.17wt%, Al 2 o 3 4.25wt%, Fe 2 o 3 2.81wt%, LOI30.95wt%.

[0084] The chemical composition of magnesium-based substrate waste is:

[0085] SiO 2 10.15wt%, CaO 6.56wt%, MgO 41.82wt%, Al 2 o 3 4.05wt%, Fe 2 o 3 2.47wt%, LOI34.95%.

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Abstract

The invention discloses a curing agent for deeply stirring mucky soil as well as a preparation method and a use method thereof, and belongs to the field of mucky soil curing agents. The curing agent comprises the following components in parts by weight: 30-40 parts of cement, 30-40 parts of papermaking white mud and 20-40 parts of magnesium-based board waste, wherein the sum of the components above is 100 parts in parts by weight; and the content of MgO in the magnesium-based board waste is greater than or equal to 30wt%. The curing agent disclosed by the invention is high in strength and strong in impermeability after curing.

Description

technical field [0001] The invention relates to the field of silty soil curing agents, in particular to a curing agent for deep stirring silty soil and a preparation method thereof. Background technique [0002] In Guangdong area, the distribution of soft soil is relatively extensive and prominent, so the construction of highway and track projects must take corresponding foundation reinforcement measures to ensure the safety and durability of the project. The cement-soil mixing method is widely used in the treatment of weak foundations in road engineering, bridge engineering, sluices, ports, etc. due to its advantages such as good pile stability, less lateral extrusion, and less impact on the surrounding environment. [0003] Traditional cement mixing piles usually use cement as a curing agent to harden soft soil to improve foundation strength. However, soft soil has the characteristics of high water content, large void ratio, low strength, large deformation, and long consol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C02F11/143C04B18/16C04B18/24
CPCC04B28/04C02F11/143C04B2111/00767C04B18/16C04B18/241Y02W30/91
Inventor 舒本安周敏杨腾宇李永铃任彦飞郑礼尚陈剑刚马云龙邱冰郭立贤邱文俊李白云曾欠谱焦元
Owner FOSHAN TRANSPORTATION SCI & TECH CO LTD
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