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A kind of recycled micropowder cement mixture material and preparation method thereof

A technology of recycled micropowder and mixed materials, which is applied in the direction of cement production, etc., can solve problems such as environmental and personal safety hazards, deterioration of the natural environment, and immature research, and achieve the effects of saving resources, low production costs, and promoting the development of circular economy

Active Publication Date: 2018-08-17
WUHAN YUANJING READY MIXED CONCRETE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most construction wastes are disposed of in traditional ways, which not only occupy a large amount of land, but also cause great harm to the environment and personal safety.
In addition, mass production of concrete requires massive mining of high-quality natural sand and gravel resources, resulting in serious deterioration of the natural environment
There have been many studies on the processing of construction waste into recycled aggregates to replace natural sand and gravel to produce concrete, but processing construction waste into concrete with a specific surface area greater than 400 m 2 / kg ultrafine powder to replace cement or as an admixture to prepare concrete research is not mature enough

Method used

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  • A kind of recycled micropowder cement mixture material and preparation method thereof

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Embodiment 1

[0031] This embodiment provides a recycled micropowder cement mixture, which is obtained by grinding and mixing activated construction waste powder, activator, desulfurized gypsum, and cement clinker. The components are mixed according to the following mass ratio: active construction waste powder: activator: desulfurized gypsum : Cement clinker is 4:1.5:1:21.

[0032] The preparation method of above-mentioned recycled micropowder cement admixture comprises the steps:

[0033] 1) Crushing: crushing construction waste into 30mm particles;

[0034] 2) Pretreatment: Calcining 30mm construction waste at 400°C for 3 hours;

[0035] 3) Ball milling: mill the pretreated construction waste in a ball mill for 4 hours to obtain construction waste powder ≤ 80 μm;

[0036] 4) Calcination: calcining construction waste ≤ 80 μm at 600°C for 2 hours, raising the temperature to 900°C for 2 hours for 0.5 hours, and cooling to room temperature for 0.5 hours to obtain active construction waste p...

Embodiment 2

[0039] This embodiment provides a recycled micropowder cement mixture, which is obtained by grinding and mixing activated construction waste powder, activator, desulfurized gypsum, and cement clinker. The components are mixed according to the following mass ratio: active construction waste powder: activator: desulfurized gypsum : Cement clinker is 2.85:1.05:0.72:15.

[0040] The preparation method of above-mentioned recycled micropowder cement admixture comprises the steps:

[0041] 1) Crushing: crushing construction waste into 25mm particles;

[0042] 2) Pretreatment: Calcining 25mm of construction waste at 500°C for 2 hours;

[0043] 3) Ball milling: mill the pretreated construction waste in a ball mill for 3.5 hours to obtain construction waste powder with a size of 30 μm to 80 μm;

[0044] 4) Calcination: Calcining 30 μm ~ 80 μm construction waste at 600°C for 2 hours, raising the temperature to 900°C for 2 hours for 0.5 hours, and cooling to room temperature for 0.5 hou...

Embodiment 3

[0047] This embodiment provides a recycled micropowder cement mixture, which is obtained by grinding and mixing activated construction waste powder, activator, desulfurized gypsum, and cement clinker. The components are mixed according to the following mass ratio: active construction waste powder: activator: desulfurized gypsum : Cement clinker is 2:2.1:0.1:18.

[0048] The preparation method of above-mentioned recycled micropowder cement admixture comprises the steps:

[0049] 1) Crushing: crushing construction waste into 25mm particles;

[0050] 2) Pretreatment: Calcining 25mm of construction waste at 300°C for 5 hours;

[0051] 3) Ball milling: mill the pretreated construction waste in a ball mill for 2.5 hours to obtain construction waste powder smaller than 80 μm;

[0052] 4) Calcination: calcining construction waste smaller than 80 μm at 600°C for 2 hours, raising the temperature to 900°C for 2 hours for 0.5 hours, and cooling to room temperature for 0.5 hours to obtai...

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Abstract

The invention discloses a renewable micropowder and cement admixture and a preparation method thereof. The renewable micropowder and cement admixture is obtained by grinding and mixing activated building garbage powder, an excitant, desulfurized gypsum and cement clinker according to the mass ratio of 2-8: 0.21-2.1:0.1-1:15-21. Sources of the raw materials required for the renewable micropowder and cement admixture are wide. Use amount of cement clinker can be reduced, and reuse rate of solid waste is increased. The invention has a good effect of protecting the ecological environment and promoting circular economy. Meanwhile, the product can satisfy strength standard of ordinary Portland cement.

Description

technical field [0001] The invention relates to the field of solid waste utilization, in particular to a regenerated micropowder cement admixture and a preparation method thereof. Background technique [0002] With the continuous increase in the scale of urban reconstruction and expansion in my country and the rapid advancement of the construction of a new socialist countryside, the demolition of a large number of old buildings and structures has produced a large amount of construction waste such as concrete, bricks, stones, mortar and tiles. According to the estimate of the Ministry of Housing and Urban-Rural Development, by 2020, China will build 30 billion square meters of new housing, and the resulting construction waste will reach at least 5 billion tons. At present, most construction wastes are disposed of in traditional ways, which not only occupy a large amount of land, but also cause great harm to the environment and personal safety. In addition, mass production of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/24
CPCC04B7/246Y02P40/10
Inventor 何志斌张双艳
Owner WUHAN YUANJING READY MIXED CONCRETE CO LTD
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