Preparation method of alkali-activated copper slag-based pervious concrete and alkali-activated copper slag-based pervious concrete

A technology of permeable concrete and alkali excitation, which is applied in the preparation field of alkali-excited copper slag-based permeable concrete and alkali-excited copper slag-based permeable concrete, can solve the problems of uneconomical and environmental protection, poor flexural strength, and production methods such as easy falling off of aggregates. , to save natural resources, improve wear resistance, and reduce material costs

Pending Publication Date: 2022-04-15
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the shortcomings of the alkali-activated copper slag-based permeable concrete prepared by the above method, such as poor wear resistance, compressive strength, and flexural strength, the aggregate of the permeable concrete is easy to fall off, and the production method is uneconomical and environmentally friendly. Preparation method of alkali-activated copper slag-based pervious concrete with good wear resistance, high flexural strength and high aggregate bonding strength under the premise of ensuring water permeability and setting time

Method used

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  • Preparation method of alkali-activated copper slag-based pervious concrete and alkali-activated copper slag-based pervious concrete

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Experimental program
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Effect test

Embodiment 1

[0036] A preparation method of alkali-activated copper slag-based permeable concrete, the steps are as follows:

[0037] 1) Copper slag (copper industry waste slag, iron content is 49%) and calcium carbide slag (waste slag produced for industrial production of acetylene, with a median particle size of 1 μm) are dry-milled with a drum dry mill to obtain copper slag powder (The density of copper slag powder is 3.5kg / m 3 , the color is gray-black, the specific surface area is 350m 2 / kg, the particle size of copper slag powder is 32 μm), calcium carbide slag powder; red mud (waste slag produced for bauxite production) is crushed with a crusher, and then dry-milled with a drum dry mill to obtain red mud powder (grinding The median particle size of crushed red mud is 3 μm);

[0038] 2) Take 200 parts by weight of the above-mentioned copper slag powder, 100 parts by weight of water, and add 0.2 parts by weight of a water reducer (the water reducer is a mixed water reducer obtained b...

Embodiment 2

[0042] A preparation method of alkali-activated copper slag-based permeable concrete, the steps are as follows:

[0043] 1) Copper slag (copper industry waste slag with iron content of 53%) and calcium carbide slag (waste slag produced for industrial production of acetylene with a median particle size of 2 μm) were dry-milled with a drum dry mill to obtain copper slag powder (The density of copper slag powder is 4.0kg / m 3 , the color is gray-black, the specific surface area is 400m 2 / kg, the particle size of copper slag powder is 35 μm), calcium carbide slag powder; red mud (waste slag produced for bauxite production) is crushed with a crusher, and then dry-milled with a drum dry mill to obtain red mud powder (grinding The median particle size of crushed red mud is 4 μm);

[0044] 2) Take 195 parts by weight of the above-mentioned copper slag powder, 95 parts by weight of water, and add 0.1 parts by weight of a water reducer (the water reducer is a mixed water reducer obtai...

Embodiment 3

[0048] A preparation method of alkali-activated copper slag-based permeable concrete, the steps are as follows:

[0049] 1) Copper slag (copper industry waste slag, iron content is 51%) and calcium carbide slag (waste slag produced for industrial production of acetylene, median particle size is 1 μm) are dry-milled with a drum dry mill to obtain copper slag powder (The density of copper slag powder is 3.8kg / m 3 , the color is gray-black, the specific surface area is 380m 2 / kg, the particle size of copper slag powder is 33 μm), calcium carbide slag powder; red mud (waste slag produced for bauxite production) is crushed with a crusher, and then dry-milled with a drum dry mill to obtain red mud powder (grinding The median particle size of crushed red mud is 3 μm);

[0050] 2) Take 205 parts by weight of the above-mentioned copper slag powder, 105 parts by weight of water, and add 0.2 parts by weight of a water reducer (the water reducer is a mixed water reducer obtained by mix...

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Abstract

The invention provides a preparation method of alkali-activated copper slag-based pervious concrete and the alkali-activated copper slag-based pervious concrete. The method comprises the following steps: (1) respectively carrying out dry grinding on copper slag and carbide slag to obtain copper slag powder and carbide slag powder; crushing the red mud, and performing dry grinding to obtain red mud powder; (2) 195-205 parts by weight of copper slag powder and 95-105 parts by weight of water are taken, 0.1-0.2 part by weight of a water reducing agent is added, wet grinding is conducted for 15-25 min, and copper slag slurry is obtained and marked as slurry A; taking 80-83 parts by weight of red mud powder and 160-165 parts by weight of water, and performing wet grinding for 20-40 minutes to obtain red mud slurry which is marked as slurry B; (3) mixing ammonium tartrate, sodium sulfate, lignosulfonate, hydroxypropyl methyl cellulose and wood fiber according to a ratio of 1: 2: 3: 1: 1 to prepare a reinforcing agent; and (4) uniformly stirring 20-40 parts by weight of carbide slag powder, 50-60 parts by weight of the slurry A, 30-40 parts by weight of the slurry B, 2-8 parts by weight of sodium carbonate, 5-15 parts by weight of water, 2-3 parts by weight of a reinforcing agent, 1-2 parts by weight of a water reducing agent, 120-160 parts by weight of river sand, 40-80 parts by weight of copper slag powder and 250-350 parts by weight of coal gangue.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a method for preparing alkali-activated copper slag-based permeable concrete and the alkali-activated copper slag-based permeable concrete prepared by the method. Background technique [0002] With the rapid development of urbanization, impermeable concrete is often used on urban floors. However, high temperature rain in summer, urban waterlogging caused by large precipitation, and groundwater level drop have seriously affected people's normal life. In order to ensure the strength of ordinary concrete pavement, the number of internal pores The lack of water permeability and air permeability reduces the urban air humidity and easily leads to the formation of the heat island effect. Under the background of "sponge city" construction, a kind of permeable concrete with air permeability, water permeability and light weight was born. Permeable concrete is a green...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B38/00C04B111/20C04B111/40
CPCC04B28/006C04B38/0041C04B2201/50C04B2111/40C04B2111/00284C04B2111/20C04B18/144C04B18/0427C04B18/0409C04B24/122C04B22/147C04B24/18C04B24/383C04B18/26C04B22/10C04B14/06C04B18/12C04B2103/302
Inventor 王迎斌胡轶贺行洋苏英杨杰何岩原振毅陈顺陈威王佳菲
Owner HUBEI UNIV OF TECH
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