Active admixture and preparation method thereof

A technology for active admixtures and raw materials, which is applied in the field of active admixtures and their preparation, can solve the problems of not being able to solve environmental protection problems well, enterprise enthusiasm, complicated product preparation processes, and imperfect utilization technologies, etc. Stable product performance and low activation temperature in medium heat

Inactive Publication Date: 2021-11-02
KUNMING UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since 2019, the utilization rate of some solid wastes in my country has greatly increased, such as coal gangue and fly ash, but the utilization rate is still low
[0005] At present, solid waste such as limestone slag, steel slag, coal gangue, and calcium carbide slag mainly adopts the method of "stockpiling and using". The utilization technology is not perfect, the production process is complicated, and the added value of the product is low. Entrepreneurship

Method used

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  • Active admixture and preparation method thereof
  • Active admixture and preparation method thereof
  • Active admixture and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: as figure 1 , 2 As shown, the active admixture is an active admixture made by pulverizing, mixing, pressing, heat-treating, and grinding the raw materials in the following mass percentages: limestone waste slag 45wt%, carbide slag 5wt%, steel slag 20wt%, coal gangue 30wt%. Limestone waste slag, steel slag, and coal gangue are crushed to pass 100 mesh and the sieve residue is less than 5%.

[0030] The preparation method of active admixture of the present invention, concrete preparation steps are as follows:

[0031] (1) Raw material pretreatment: Limestone waste slag, calcium carbide slag, steel slag, and coal gangue are respectively taken as raw materials, and the limestone waste slag, steel slag, and coal gangue are respectively crushed to pass 100 mesh and the sieve residue is less than 5%.

[0032] (2) Static pressure molding: Weigh the raw materials processed in step (1) according to the mass percentage, mix them evenly, put them into the static pre...

Embodiment 2

[0040] Embodiment 2: as figure 1 , 3 As shown, the active admixture is an active admixture made by pulverizing, mixing, pressing, heat-treating, and grinding the raw materials in the following mass percentages: limestone waste slag 50wt%, carbide slag 8wt%, steel slag 15wt%, coal gangue 27wt%. Limestone waste slag, steel slag, and coal gangue are crushed to 100 mesh, and the sieve residue is less than 5%.

[0041] The preparation method of active admixture of the present invention, concrete preparation steps are as follows:

[0042] (1) Raw material pretreatment: Limestone waste slag, calcium carbide slag, steel slag, and coal gangue are respectively taken as raw materials, and the limestone waste slag, steel slag, and coal gangue are respectively crushed to 100 mesh, and the sieve residue is less than 5%.

[0043] (2) Static pressure molding: Weigh the raw materials processed in step (1) according to the mass percentage, mix them evenly, put them into the static pressure mo...

Embodiment 3

[0051] Embodiment 3: as figure 1 , 4 As shown, the active admixture is an active admixture obtained by pulverizing, mixing, pressing, heat-treating, and grinding raw materials in the following mass percentages: limestone waste slag 60wt%, carbide slag 10wt%, steel slag 10wt%, and coal gangue 20wt%. Limestone waste slag, steel slag, and coal gangue are crushed to 100 mesh, and the sieve residue is less than 5%.

[0052] The preparation method of active admixture of the present invention, concrete preparation steps are as follows:

[0053] (1) Raw material pretreatment: Limestone waste slag, calcium carbide slag, steel slag, and coal gangue are respectively taken as raw materials, and the limestone waste slag, steel slag, and coal gangue are respectively crushed to 100 mesh, and the sieve residue is less than 5%.

[0054] (2) Static pressure molding: Weigh the raw materials processed in step (1) according to the mass percentage, mix them evenly, put them into the static pressu...

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Abstract

The invention relates to an active admixture and a preparation method thereof, and belongs to the technical field of building material production and the technical field of industrial solid waste resource utilization. The active admixture is prepared from the following raw materials in percentage by mass through crushing, mixing, profiling, heat treatment and grinding. The active admixture comprises the following components in percentage by weight: 45-60 wt% of limestone waste residue, 5-10 wt% of carbide slag, 10-20 wt% of steel slag, and 20-30 wt% of coal gangue. According to the active admixture prepared by the method, solid waste is used as a raw material, steel slag is used as a mineralizer, carbide slag slurry is used as an adhesive, a mineralizer and an adhesive do not need to be additionally added, and the product performance is stable. Meanwhile, the medium heat activation temperature is low, the production cost is low, the process is simple, and high economic benefits are achieved.

Description

technical field [0001] The invention relates to an active admixture and a preparation method thereof, belonging to the technical fields of building material production and industrial solid waste resource utilization. Background technique [0002] The permanent admixture refers to an inorganic powder used to replace part of the cement in order to adjust the performance of the concrete and reduce the production cost during the concrete production process. Usually the active admixture is prepared from the mineral phases such as granulated blast furnace slag, phosphorus slag, fly ash, and silicon powder, which have gelling properties under the action of an activator. [0003] At present, limestone waste is the residue left over from mining limestone, with high mud content, low CaO content, and no gelling property. It is a kind of solid waste that has not found a way to use it. The impurity waste slag produced in the steelmaking process of steel slag open hearth furnace has the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/24C04B7/147C04B7/36
CPCC04B7/24C04B7/147C04B7/36Y02P40/10
Inventor 赵龑魏兴夏举佩李朴忠
Owner KUNMING UNIV OF SCI & TECH
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