CN110963773A - Microbial coal gangue/coal slime building material and manufacturing method thereof - Google Patents
Microbial coal gangue/coal slime building material and manufacturing method thereof Download PDFInfo
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- CN110963773A CN110963773A CN201911145389.8A CN201911145389A CN110963773A CN 110963773 A CN110963773 A CN 110963773A CN 201911145389 A CN201911145389 A CN 201911145389A CN 110963773 A CN110963773 A CN 110963773A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/10—Lime cements or magnesium oxide cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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Abstract
The invention discloses a microorganism coal gangue/coal slime building material and a preparation method thereof, and the concrete formula is as follows: 0-80 parts of coal gangue, 0-30 parts of coal slime, 5-30 parts of steel slag, 5-50 parts of waste incineration fly ash, 2-10 parts of silica powder, 10-20 parts of slaked lime, 5-50 parts of expanded perlite dust remover dust, 10-40 parts of bacterial liquid, 2-4 parts of EVA emulsion, 0.1-0.5 part of silane coupling agent and 0-0.5 part of water reducing agent. The preparation method can prepare and obtain various microbial coal gangue and coal slime building material products, including coal gangue and coal slime concrete, coal gangue and coal slime building blocks and coal gangue and coal slime water permeable bricks, is green and pollution-free, has high solid waste utilization rate and has good environmental benefit.
Description
Technical Field
The invention relates to the field of novel building materials, in particular to a microbial coal gangue/coal slime building material and a manufacturing method thereof.
Background
Coal gangue and coal slime are solid wastes generated in the coal mining and washing processes. The coal gangue and the coal slime become industrial wastes with the largest storage amount and annual output and the largest occupation of stacking sites, and bring a series of problems to the environment and the society. The coal gangue stockpiling occupies a large amount of land, so that the areas of cultivated land and forest land are reduced; SO produced by spontaneous combustion of coal gangue2、NOxToxic and harmful gas, toxic and harmful elementThe rainwater can also pollute underground water and soil along with leaching and percolation, and serious harm is caused to the ecological environment; coal enterprises also need to invest a large amount of capital every year to solve the problems of expropriation of coal gangue land, pollution of gangue dump, coping with natural disasters such as landslide and debris flow and the like. Therefore, increasing the comprehensive utilization of coal gangue and coal slime has been urgent.
The application of the traditional coal gangue and coal slime in the building field is mainly used for preparing sintered bricks or road bed landfill. But the coal gangue baked brick has high energy consumption and secondary pollution, and the coal gangue baked brick has the problems of low strength, easy cracking and the like in the using process. In addition, harmful substances such as heavy metals and the like exist in the coal gangue and the coal slime, and if the coal gangue and the coal slime are used as building materials without treatment, the environment is adversely affected.
Disclosure of Invention
The invention aims to provide a microbial coal gangue/coal slime building material and a manufacturing method thereof, which are used for solving the problems of application of coal slime and coal gangue in building materials and improving the resource utilization rate of the coal slime and the coal gangue.
The invention is realized by the following technical scheme:
a microbial coal gangue/coal slime building material is prepared from the following raw materials in parts by weight:
0-80 parts of coal gangue, 0-30 parts of coal slime, 5-30 parts of steel slag, 5-50 parts of waste incineration fly ash, 2-10 parts of silica powder, 10-20 parts of slaked lime, 5-50 parts of expanded perlite dust remover dust, 10-40 parts of bacterial liquid, 2-4 parts of EVA emulsion, 0.1-0.5 part of silane coupling agent and 0-0.5 part of water reducing agent.
The microorganisms in the bacteria liquid refer to mineralized bacteria with mineralized deposition function, namely single bacteria or mixed bacteria, and single bacteria or mixed bacteria obtained by acclimatization of the microorganisms for adapting to production process and environment. The microorganism especially refers to microorganism KJ01 strain (which has been preserved in China general microbiological culture Collection center CGMCC at 26.3.2018, address: China academy of sciences, institute of microbiology 3, West Lu No.1, Beijing, the south China, having a preservation number of CGMCC No.15516, and having a classification name of Aeromonas,Aeromonas sp.) And (4) screening, activating and culturing to obtain a bacterial liquid.
The preparation method of the KJ01 bacterial liquid comprises the following steps: (1) preparing a culture medium of KJ01 strain: the culture medium comprises 1L of distilled water, 6g of peptone, 4g of beef extract and NaHCO per liter30.45g、Na2CO30.6 g. Adjusting the pH value of the culture medium to be pH =8 by using 1mol/L sodium hydroxide solution, and sterilizing at 120 ℃ for 20 minutes; (2) inoculating KJ01 strain into the liquid culture medium, and performing shaking culture for 24 hours to obtain a bacterial liquid; centrifuging the obtained bacterial liquid for 20 minutes by a centrifugal machine at the rotating speed of 4000r/min to obtain bacterial sludge; (3) re-suspending the bacterial sludge in sterilized distilled water, and diluting to obtain the bacterial strain with the concentration of (1.0-1.4) x 109one/mL of the bacterial suspension.
The microorganism adopted by the invention is a microorganism with the function of mineralizing and depositing or the function of generating adhesive polysaccharide. Mineralized sediment or polysaccharide generated by microorganisms wraps the coal gangue and the coal slime, so that the phenomenon that heavy metal ions are leached out and migrate to the outside of the building material due to water immersion when the coal gangue is used as the building material is prevented, and the environment and the normal use are influenced. In addition, mineralized sediments or polysaccharides of the microorganisms also have the function of a binder, and are combined with steel slag, waste incineration fly ash, silicon micropowder, hydrated lime and other materials to form a cementing system, coal gangue and coal slime are bonded to form a building material, and meanwhile, the microorganism coal gangue and coal slime building material generates higher strength in a short time through a drying process.
The coal gangue is crushed by a jaw crusher to have a grain diameter of 0.15 mm-4 mm.
The silicon micro powder (organic silicon) comprises organic silicon water repellents such as sodium metasilicate A, potassium metasilicate A, polysiloxane and the like.
The silane coupling agent is one of KH550, KH560 and KH 570.
The dust of the expanded perlite dust remover is dust collected by the dust remover from debris generated in the expansion of perlite in the process of producing the expanded perlite, the particle size of the dust is less than 0.1mm, the chemical composition of the dust is the same as that of the expanded perlite, and the dust is prepared from SiO2And Al2O3Mainly comprises the following steps.
TABLE 1 chemical composition of dust from expanded perlite dust remover
The preparation method of the microbial coal gangue/coal slime building material comprises the following steps: (1) uniformly mixing several solid aggregates and powder materials such as coal gangue, coal slime, steel slag, waste incineration fly ash, silicon micropowder, slaked lime, expanded perlite dust remover dust, a water reducing agent and the like; (2) uniformly mixing the prepared bacterial liquid with several liquids such as EVA emulsion, silane coupling agent and the like; (3) adding the mixed solution prepared in the step (2) into the mixture of the solid aggregate and the powder prepared in the step (1), uniformly stirring, carrying out microbial mineralization deposition culture for several hours, and then putting into a mold for molding. The forming process comprises two modes of pouring, vibrating and forming and extrusion forming, and different types of microbial coal gangue/coal slime building materials are prepared.
The microbial coal gangue and coal slime building material and the manufacturing method thereof have the following characteristics:
firstly, the microbial mineralization deposition product is used as a cementing material to modify coal gangue and coal slime and is used for manufacturing building materials, so that the massive utilization of the coal gangue is realized, and the environmental influence caused by the stockpiling of the coal gangue and the coal slime can be solved.
And secondly, the microbial mineralization deposition product is used as a cementing material to manufacture the building material, so that the use of traditional cementing materials such as cement is avoided, and the method is a green and environment-friendly building material manufacturing method and has obvious environmental and social benefits.
Thirdly, the coal gangue and the coal slime are wrapped by mineralized deposition products of microorganisms, so that leaching of harmful substances in the coal gangue and the coal slime can be reduced, and the use safety and the environmental protection performance of the coal gangue and the coal slime building material products are improved.
The invention has reasonable design, can prepare and obtain various microbial coal gangue and coal slime building material products, including coal gangue and coal slime concrete, coal gangue and coal slime building blocks and coal gangue and coal slime water permeable bricks, has green and pollution-free preparation method, high utilization rate of solid waste, good environmental benefit and good practical application value.
Detailed Description
The following provides a detailed description of specific embodiments of the present invention.
Example 1
The microbial coal gangue concrete can be prepared from the following raw materials in parts by weight: 50-80 parts of coal gangue, 5-30 parts of steel slag, 5-50 parts of waste incineration fly ash, 2-10 parts of silicon powder, 10-20 parts of hydrated lime, 5-50 parts of expanded perlite dust remover dust, 10-40 parts of bacterial liquid, 2-4 parts of EVA emulsion, 0.1-0.5 part of silane coupling agent and 0.2-0.5 part of water reducing agent.
The microbial coal gangue concrete is prepared from the following raw materials in parts by weight:
80 parts of coal gangue, 5 parts of steel slag, 5 parts of waste incineration fly ash, 2 parts of silicon micropowder, 20 parts of hydrated lime, 5 parts of expanded perlite dust remover dust, 30 parts of bacterial liquid, 2 parts of EVA emulsion, KH 5600.1 parts of silane coupling agent and 0.5 part of water reducing agent.
The bacterial liquid is obtained by screening, activating and culturing microorganism KJ01 strains.
The preparation method of the microorganism coal gangue concrete comprises the following steps: (1) crushing the coal gangue into coal gangue particles with the particle size of 0.15 mm-1 mm for later use; (2) uniformly mixing several solid aggregates and powder such as coal gangue, steel slag, waste incineration fly ash, silicon micropowder, hydrated lime, expanded perlite dust remover dust, a water reducing agent and the like; (3) uniformly mixing the prepared bacterial liquid with EVA emulsion and silane coupling agent; (4) adding the mixed solution prepared in the step (3) into the solid mixture obtained in the step (2), uniformly stirring, carrying out microbial mineralization deposition culture for 12 hours, and pouring into a mold for vibration molding.
The microbial coal gangue concrete prepared by the method has the compression strength of 45MPa and the softening coefficient of more than 0.9.
Example 2
The microbial coal gangue and coal slime concrete is prepared from the following raw materials in parts by weight:
50 parts of coal gangue, 30 parts of coal slime, 10 parts of steel slag, 15 parts of waste incineration fly ash, 10 parts of silicon micropowder, 20 parts of hydrated lime, 20 parts of expanded perlite dust remover dust, 40 parts of bacterial liquid, 4 parts of EVA emulsion, KH 5600.1 parts of silane coupling agent and 0.5 part of water reducing agent.
The bacterial liquid is obtained by screening, activating and culturing microorganism KJ01 strains.
The preparation method of the microorganism coal gangue and coal slime concrete comprises the following steps: (1) crushing the coal gangue into coal gangue particles with the particle size of 0.15 mm-1 mm for later use; (2) drying the coal slime and sieving the coal slime with a 100-mesh sieve for later use; (3) uniformly mixing several solid aggregates and powder materials such as coal gangue, coal slime, steel slag, waste incineration fly ash, silicon micropowder, slaked lime, expanded perlite dust remover dust, a water reducing agent and the like; (4) uniformly mixing the prepared bacterial liquid with EVA emulsion and silane coupling agent; (5) and (3) adding the mixed solution prepared in the step (4) into the solid mixture obtained in the step (3), uniformly stirring, carrying out microbial mineralization deposition culture for 12 hours, and pouring into a mold for vibration molding.
The microbial coal gangue and coal slime concrete prepared by the method has the compression strength of 37MPa and the softening coefficient of more than 0.9.
The coal gangue is crushed into particles to be used as aggregate, and is one of main sources of the strength of the coal gangue concrete. The coal slime is used as a filler, and the solid waste utilization rate of the coal gangue and coal slime concrete is mainly improved. Therefore, the compression strength of the coal gangue is higher when the pure coal gangue is adopted in the embodiment 1. And the embodiment 2 adds the coal slime, although the intensity is reduced, the solid waste utilization rate of the coal slime is improved.
Example 3
The microbial coal gangue building block can be prepared from the following raw materials in parts by weight: 50-80 parts of coal gangue, 5-30 parts of steel slag, 5-50 parts of waste incineration fly ash, 2-10 parts of silicon powder, 10-20 parts of hydrated lime, 5-50 parts of expanded perlite dust remover dust, 10-40 parts of bacterial liquid, 2-4 parts of EVA emulsion and 0.1-0.5 part of silane coupling agent.
The microbial coal gangue building block is prepared from the following raw materials in parts by weight:
80 parts of coal gangue, 30 parts of steel slag, 5 parts of waste incineration fly ash, 10 parts of silicon micropowder, 20 parts of hydrated lime, 5 parts of expanded perlite dust remover dust, 20 parts of bacterial liquid, 4 parts of EVA emulsion and KH 5600.1 parts of silane coupling agent.
The bacterial liquid is obtained by screening, activating and culturing microorganism KJ01 strains.
The preparation method of the microbial coal gangue building block comprises the following steps: (1) crushing the coal gangue into coal gangue particles with the particle size of 1 mm-2 mm for later use; (2) uniformly mixing several solid aggregates and powder such as coal gangue, steel slag, waste incineration fly ash, silicon micropowder, hydrated lime, expanded perlite dust remover dust and the like; (3) uniformly mixing the prepared bacterial liquid with EVA emulsion and silane coupling agent; (4) adding the mixed solution prepared in the step (3) into the solid mixture obtained in the step (2), uniformly stirring, carrying out microbial mineralization deposition culture for 24 hours, and then putting into a die for compression molding, wherein the compression molding pressure is 20 MPa.
The microbial coal gangue building block prepared by the method has the compression strength of 53MPa and the softening coefficient of more than 0.9.
Example 4
The microbial coal slime building block can be prepared from the following raw materials in parts by weight: 15-30 parts of coal slime, 5-30 parts of steel slag, 5-50 parts of waste incineration fly ash, 2-10 parts of silicon powder, 10-20 parts of hydrated lime, 5-50 parts of expanded perlite dust remover dust, 10-40 parts of bacterial liquid, 2-4 parts of EVA emulsion and 0.1-0.5 part of silane coupling agent.
The microbial coal slime building block is prepared from the following raw materials in parts by weight:
30 parts of coal slime, 30 parts of steel slag, 50 parts of waste incineration fly ash, 10 parts of silicon micropowder, 10 parts of hydrated lime, 50 parts of expanded perlite dust remover dust, 40 parts of bacterial liquid, 2 parts of EVA emulsion and KH 5600.5 parts of silane coupling agent.
The bacterial liquid is obtained by screening, activating and culturing microorganism KJ01 strains.
The preparation method of the microbial coal slime building block comprises the following steps: (1) drying the coal slime for later use; (2) uniformly mixing several solid aggregates and powder such as coal slime, steel slag, waste incineration fly ash, silicon micropowder, hydrated lime, expanded perlite dust remover dust, a water reducing agent and the like; (3) uniformly mixing the prepared bacterial liquid with EVA emulsion and silane coupling agent; (4) and (3) adding the mixed solution prepared in the step (3) into the solid mixture obtained in the step (2), uniformly stirring, carrying out microbial mineralization deposition culture for 12 hours, then putting into a die, carrying out extrusion molding, and carrying out molding under the pressure of 20 MPa.
The microbial coal slime building block prepared by the method has the compression strength of 12MPa and the softening coefficient of more than 0.9.
In the embodiment 3, the coal gangue is crushed into particles and used as aggregate, and is one of main sources of coal gangue building blocks, so that the coal gangue building blocks have very high strength. In the embodiment 4, the coal slime is only used as a filler, although the strength of the building block is only 12MPa, the strength of the building block meets the strength requirement of the building block, and more importantly, the solid waste utilization rate of the coal slime is greatly improved.
Example 5
The microbial coal gangue and coal slime water permeable brick is prepared from the following raw materials in parts by weight: 60 parts of coal gangue, 15 parts of coal slime, 15 parts of steel slag, 24 parts of waste incineration fly ash, 18 parts of silicon micropowder, 16 parts of hydrated lime, 5 parts of expanded perlite dust remover dust, 10 parts of bacterial liquid, 2 parts of EVA emulsion, KH 5600.1 parts of silane coupling agent and 0.2 part of water reducing agent.
The bacterial liquid is obtained by screening, activating and culturing microorganism KJ01 strains.
The preparation method of the microbial coal gangue coal slime water permeable brick comprises the following steps of (1) crushing coal gangue into coal gangue particles with the particle size of 3-4 mm for later use; (2) drying the coal slime and sieving the coal slime with a 100-mesh sieve for later use; (3) uniformly mixing several solid aggregates and powder materials such as coal gangue, coal slime, steel slag, waste incineration fly ash, silicon micropowder, slaked lime, expanded perlite dust remover dust, a water reducing agent and the like; (4) uniformly mixing the prepared bacterial liquid with EVA emulsion and silane coupling agent KH 560; (5) and (3) adding the mixed solution prepared in the step (4) into the solid mixture obtained in the step (3), uniformly stirring, carrying out microbial mineralization deposition culture for 12 hours, then putting into a die, carrying out extrusion molding, and carrying out molding under the pressure of 20 MPa.
The microbial coal gangue and coal slime water permeable brick prepared by the method has the water permeability coefficient of more than or equal to 2.0 multiplied by 10-2cm/s, the tensile strength of splitting is more than or equal to 3MPa, and the frost resistance, the wear resistance and the skid resistance all meet the requirementsAnd (5) performing specification requirements.
The coal gangue adopted in the embodiment 2 is crushed into the particle size of 0.15 mm-1 mm, and the coal gangue adopted in the embodiment 5 is crushed into the particle size of 3 mm-4 mm. The coal gangue with large particle size adopted in the embodiment 5 enables larger gaps to be formed among particles, so that the coal gangue with large particle size has a water permeable effect, and a water permeable brick can be prepared.
The concrete, the building blocks and the water permeable bricks mainly use stones, sands and cement in the form of used materials, and in the embodiment of the invention, the traditional stones and sands are replaced by gangue particles with different particle sizes obtained by crushing gangue, and a mineralized product generated by microorganisms is combined with a certain cementing material to replace the cement, so that the microorganism gangue coal slime concrete is formed. The building blocks and the permeable bricks are two forms of concrete, generally called as concrete building blocks and concrete permeable bricks, and the corresponding strength and function are obtained by adjusting the material proportion and the aggregate gradation.
It should be noted that modifications and applications may occur to those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A microorganism coal gangue/coal slime building material is characterized in that: the feed is prepared from the following raw materials in parts by weight:
0-80 parts of coal gangue, 0-30 parts of coal slime, 5-30 parts of steel slag, 5-50 parts of waste incineration fly ash, 2-10 parts of silica powder, 10-20 parts of slaked lime, 5-50 parts of expanded perlite dust remover dust, 10-40 parts of bacterial liquid, 2-4 parts of EVA emulsion, 0.1-0.5 part of silane coupling agent and 0-0.5 part of water reducing agent.
2. The microbial coal gangue/coal slime building material of claim 1, wherein: preparing microorganism coal gangue concrete from the following raw materials in parts by weight:
50-80 parts of coal gangue, 5-30 parts of steel slag, 5-50 parts of waste incineration fly ash, 2-10 parts of silicon powder, 10-20 parts of hydrated lime, 5-50 parts of expanded perlite dust remover dust, 10-40 parts of bacterial liquid, 2-4 parts of EVA emulsion, 0.1-0.5 part of silane coupling agent and 0.2-0.5 part of water reducing agent.
3. The microbial coal gangue/coal slime building material of claim 1, wherein: preparing microorganism coal gangue and coal slime concrete from the following raw materials in parts by weight:
50-80 parts of coal gangue, 15-30 parts of coal slime, 5-30 parts of steel slag, 5-50 parts of waste incineration fly ash, 2-10 parts of silica powder, 10-20 parts of slaked lime, 5-50 parts of expanded perlite dust remover dust, 10-40 parts of bacterial liquid, 2-4 parts of EVA emulsion, 0.1-0.5 part of silane coupling agent and 0.2-0.5 part of water reducing agent.
4. The microbial coal gangue/coal slime building material of claim 1, wherein: the microbial coal gangue building block is prepared from the following raw materials in parts by weight:
50-80 parts of coal gangue, 5-30 parts of steel slag, 5-50 parts of waste incineration fly ash, 2-10 parts of silicon powder, 10-20 parts of hydrated lime, 5-50 parts of expanded perlite dust remover dust, 10-40 parts of bacterial liquid, 2-4 parts of EVA emulsion and 0.1-0.5 part of silane coupling agent.
5. The microbial coal gangue/coal slime building material of claim 1, wherein: preparing the microbial coal slime building block from the following raw materials in parts by weight:
15-30 parts of coal slime, 5-30 parts of steel slag, 5-50 parts of waste incineration fly ash, 2-10 parts of silicon powder, 10-20 parts of hydrated lime, 5-50 parts of expanded perlite dust remover dust, 10-40 parts of bacterial liquid, 2-4 parts of EVA emulsion and 0.1-0.5 part of silane coupling agent.
6. The microbial coal gangue/coal slime building material of claim 1, wherein: the microbial coal gangue and coal slime water permeable brick is prepared from the following raw materials in parts by weight:
60-80 parts of coal gangue, 15-30 parts of coal slime, 5-30 parts of steel slag, 5-50 parts of waste incineration fly ash, 2-10 parts of silica powder, 10-20 parts of slaked lime, 5-50 parts of expanded perlite dust remover dust, 10-40 parts of bacterial liquid, 2-4 parts of EVA emulsion, 0.1-0.5 part of silane coupling agent and 0.2-0.5 part of water reducing agent.
7. The microbial coal gangue/coal slime building material of any one of claims 1 to 6, wherein: the microorganisms in the bacterial liquid are mineralized bacteria with a mineralization deposition function, namely single bacteria or mixed bacteria, or the single bacteria or the mixed bacteria are obtained by microorganism acclimation for adapting to the production process and the environment.
8. The microbial coal gangue/coal slime building material of claim 7, wherein: the microorganism is a microorganism KJ01 strain with mineralization and deposition functions, the KJ01 strain is preserved in China general microbiological culture Collection center of China Committee for culture Collection of microorganisms (CGMCC No. 15516) in 26 months and 3 months in 2018, and the bacterial solution is obtained by screening, activating and culturing, wherein the concentration of the bacterial solution is (1.0-1.4) multiplied by 109one/mL.
9. The microbial coal gangue/coal slime building material of claim 8, wherein: the silicon micro powder comprises sodium metasilicate A, potassium metasilicate A or polysiloxane; the silane coupling agent is KH550, KH560 or KH 570.
10. The preparation method of the microbial coal gangue/coal slime building material as set forth in any one of claims 1 to 6, wherein: the method comprises the following steps:
(1) uniformly mixing the coal gangue, the coal slime, the steel slag, the waste incineration fly ash, the silicon micropowder, the hydrated lime, the expanded perlite dust remover dust and the water reducing agent;
(2) uniformly mixing the prepared bacterial liquid with EVA emulsion and silane coupling agent;
(3) adding the mixed solution prepared in the step (2) into the mixture of the solid aggregate and the powder prepared in the step (1), uniformly stirring, carrying out microbial mineralization deposition culture for several hours, and then putting into a mold for molding, wherein the molding process comprises pouring, vibrating and molding or extrusion molding.
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| CN113185170A (en) * | 2021-03-31 | 2021-07-30 | 西安交通大学 | Method for modifying coal gangue aggregate based on microbial induction technology |
| CN115093167A (en) * | 2022-06-21 | 2022-09-23 | 宁夏大学 | Method for preparing roadbed by utilizing solid waste in microorganism mineralization and cementation industry |
| CN117105610A (en) * | 2023-10-23 | 2023-11-24 | 中北大学德州产业技术研究院 | Baking-free brick of coal slime and household garbage incineration fly ash and preparation process thereof |
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