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 resis

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

Example Embodiment

[0032] Example 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 weight ratio of the above raw materials is:

[0035] Cement 8 parts

[0036] 5 servings of medical stone

[0037] 2 parts of pyrophyllite

Example Embodiment

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

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

[0040] The application method of the pure inorganic sludge curing agent solidified sludge used in filling roads is as follows: firstly adopt precipitation treatment measures such as turning the sun to reduce the moisture content of the sludge used to below 25%, and then reduce the pure inorganic sludge curing agent of the present invention Mix it into the silt and stir evenly, and then pave the road filler. The mixing amount of the silt curing agent is 25% of the silt mass.

Example Embodiment

[0041] Example 2

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

[0043] The weight ratio of the above raw materials is:

[0044] Cement 20 parts

[0045] Maifan Stone 10 servings

[0046] 5 parts of pyrophyllite

[0047] The implementation method of the sludge composite curing agent of this embodiment is the same as that of Example 1, and the mixing amount of the sludge curing 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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