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Compound sludge curing agent and application thereof

A curing agent and sludge technology, which is applied in the direction of dehydration/drying/concentrated sludge treatment, etc., can solve the problems of poor water resistance, large drying shrinkage, and high water content of solidified sludge, so as to enhance road durability and increase sludge strength , the effect of increasing the moisture content

Inactive Publication Date: 2014-09-24
TIANJIN MUNICIPAL ENG DESIGN & RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Cement and lime are commonly used as sludge curing agents, which are effective in improving the strength, but they have large drying shrinkage, are only suitable for certain specific sludge, and have poor water resistance, which leads to excessive water content in the solidified sludge, exceeding the optimum value. Moisture content, the degree of compaction during construction cannot be guaranteed to meet the acceptance criteria

Method used

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  • Compound sludge curing agent and application thereof
  • Compound sludge curing agent and application thereof
  • Compound sludge curing agent and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Taking the production of 100kg of the product of the present invention as an example, the sludge composite curing agent of this embodiment is made by mixing 53.3Kg of ordinary Portland cement C325, 33.3Kg of medical stone with a particle size of 325 mesh and 13.4Kg of pyrophyllite with a particle size of 120 mesh.

[0034] The proportioning by weight of above-mentioned raw material is:

[0035] Cement 8 parts

[0036] 5 servings of medical stone

[0037] 2 parts pyrophyllite

Embodiment approach

[0038] The implementation method of this sludge curing agent is specifically as follows:

[0039] The preparation method of the pure inorganic sludge curing agent in this embodiment is as follows: according to the proportion determined by the principle of the sludge curing agent, respectively weigh cement and pyrophyllite, and mix them evenly to obtain a pure inorganic sludge curing agent.

[0040] The application method when the pure inorganic silt solidifying agent of the present embodiment is used to solidify the silt for filling roads is as follows: firstly take precipitation treatment measures such as overturning to reduce the moisture content of the used silt to below 25%, and then use the silt pure inorganic solidifying agent of the present invention Mixed into the sludge and stirred evenly, the paving construction of the road filler can be carried out. The mixing amount of the sludge curing agent is 25% of the sludge mass.

Embodiment 2

[0042] Taking the production of 100kg of the product of the present invention as an example, the sludge composite solidifying agent of this embodiment is made by mixing 57.1Kg of ordinary Portland cement C325, 28.6Kg of medical stone with a particle size of 325 mesh and 14.3Kg of pyrophyllite with a particle size of 120 mesh.

[0043] The proportioning by weight of above-mentioned raw material is:

[0044] 20 parts of cement

[0045] 10 servings of medical stone

[0046] 5 parts pyrophyllite

[0047] The implementing method of the sludge composite solidifying agent of this embodiment is the same as that of Example 1, and the mixing amount of the sludge solidifying agent is 25% of the sludge mass.

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Abstract

The invention discloses a compound sludge curing agent and an application thereof. The curing agent is a mixture mixed from following raw materials, by weight, 8-20 parts of cement, 5-10 parts of medical stone powder and 2-5 parts of pyrophyllite powder. The cement in the sludge curing agent is mainly used for increasing a curing strength of sludge. Strong water-absorption effects of the medical stone powder and the pyrophyllite powder can be developed. The medical stone powder and the pyrophyllite powder are layer silicate minerals. Clay meniral characteristics of both of the medical stone powder and the pyrophyllite powder cooperatively work so that sludge after being cured is ensured to have relatively good anti-washout performance and anti-freeze-thawing performance and finally optimum moisture content in the cured sludge is increased and a compaction requirement during a construction process is satisfied better. The invention develops an application of the medical stone and the pyrophyllite in the technical field of curing agent and reduces cost of road construction.

Description

technical field [0001] The invention belongs to the technical field of solidification of road engineering materials, and in particular relates to a novel composite sludge solidification agent. Background technique [0002] Since the 1990s, my country's urban construction has developed rapidly, and highway construction has also grown rapidly. Along with the development of urban construction, problems of environmental pollution and shortage of resources have emerged one after another. Especially in the construction of Binhai New Area, a coastal city, the dredging project is huge, and the land formed by a large amount of silt soft soil foundation and silt dumping is very weak and difficult to use. It is easy to cause waste of land resources. In the process of highway engineering construction, scientific researchers must constantly explore new environmentally friendly road engineering materials and develop new technologies with low ecological loss in the road area. [0003] At...

Claims

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Application Information

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IPC IPC(8): C04B28/00C02F11/14
Inventor 曾伟王朝辉王新岐刘润有王晓华狄升贯高志伟王选仓李忠峰韩海生王志华周骊巍练象平张国梁高立鑫康娟萍葛娟张洋苑红凯张占领段晓沛
Owner TIANJIN MUNICIPAL ENG DESIGN & RES INST
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