Preparation method of sludge-based artificial building aggregate

A technology for building aggregates and silt, applied in the field of preparation of artificial building aggregates, can solve the problems of high mining pressure of natural aggregates, troublesome recovery and disposal of silt, etc., and achieves the realization of secondary utilization value, the preparation method is simple and convenient, and the strong mechanics Effects of properties and compressive strength

Inactive Publication Date: 2021-01-08
SHENZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of this application is to provide a method for preparing man-made construction aggregate based on silt, aiming to solve the problem of cumbersome sludge recycling and high pressure of natural aggregate mining in the prior art

Method used

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  • Preparation method of sludge-based artificial building aggregate
  • Preparation method of sludge-based artificial building aggregate
  • Preparation method of sludge-based artificial building aggregate

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preparation example Construction

[0024] The first aspect of the embodiment of the present application provides a method for preparing an artificial building aggregate based on silt, comprising the following steps:

[0025] S01. Provide sludge, and pretreat the sludge to obtain dry sludge powder;

[0026] S02. The dry sludge powder is mixed with the inorganic binder, the mineral admixture and the activator to obtain the first mixture, wherein the parts of the dry silt powder, the inorganic binder, the mineral admixture and the activator are The ratio is (50~90):(5~20):(1~30):(0.5~5);

[0027] S03. Mix and granulate the first mixture and water to obtain artificial building aggregate.

[0028] The preparation method of the silt-based artificial building aggregate provided in the first aspect of the present application, in this preparation method, the dry silt powder obtained through pretreatment is used as the main raw material, and is compounded with an inorganic binder and an activator for use. Under the act...

Embodiment 1

[0061] A kind of preparation method of artificial building aggregate based on silt

[0062] The preparation method comprises the following steps:

[0063] (1) providing sludge, drying the sludge at a temperature of 60° C. to 80° C., and then performing ball milling for 2 minutes to obtain dry sludge powder;

[0064] (2) carry out mixing process 3 minutes under the condition of 80 rev / mins with dry mud powder and inorganic binder, mineral admixture and exciter, obtain the first mixture, wherein, the addition part number of dry mud powder is 90 parts, the number of added parts of inorganic binder is 5 parts, the number of added parts of mineral admixture is 4 parts and the number of added parts of activator is 1 part; The agent is selected from geopolymer cement, the mineral admixture is selected from fly ash, and the activator is selected from the combination of sodium hydroxide and sodium silicate;

[0065] (3) The first mixture and water were granulated for 5 minutes under ...

Embodiment 2

[0069] Compared with Example 1, the difference is: in (5), "the rough artificial building aggregate after the curing treatment is carbonized for 3 days in the carbonization box of the carbon dioxide gas with a volume concentration of 20%" is revised to "the cured The processed crude artificial building aggregate was carbonized for 24 hours in a carbonization box with a volume concentration of 20% carbon dioxide gas, and the other steps were the same, and the artificial building aggregate was prepared.

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Abstract

The invention provides a preparation method of sludge-based artificial building aggregate, which comprises the steps of providing sludge, and pretreating the sludge to obtain dry sludge powder; mixingthe dried sludge powder with an inorganic binder, a mineral admixture and an excitant according to a part ratio of (50-90): (5-20): (1-30): (0.5-5) to obtain a first mixture; and mixing and granulating the first mixture and water to obtain the artificial building aggregate. According to the method, the sludge serves as a main component, the inorganic adhesive is used for crosslinking and curing harmful components, it is guaranteed that the artificial building aggregate has enough mechanical strength and excellent properties, the sludge can be recycled on a large scale through the method, andon the other hand, the artificial building aggregate can replace natural aggregate to be exploited and is widely applied to engineering such as buildings.

Description

technical field [0001] The application belongs to the technical field of inorganic non-metallic materials, and in particular relates to a preparation method of silt-based artificial building aggregate. Background technique [0002] In recent years, as urban populations have become denser and land resources have become scarcer, the resulting environmental problems are that more and more rivers have been occupied and buried by humans, and the number of urban rivers has declined rapidly. At the same time, the increase in population has also led to the rapid development of urban industry, resulting in more and more serious environmental pollution problems. Urban rivers began to play the role of natural garbage dumps. The once clear water channels were forced to be transformed into urban drainage channels. Domestic sewage, industrial wastewater and even various solid wastes were thrown into the rivers. At present, about 90% of urban rivers in our country have been seriously poll...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B18/02C04B18/04
CPCC04B18/021C04B18/0436C04B18/08C04B22/062C04B12/04Y02W30/91
Inventor 王琰帅董必钦洪舒贤邢锋张津瑞侯东帅
Owner SHENZHEN UNIV
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