CN116003057A - Preparation method of cement-based material with optimized carbon absorption efficiency - Google Patents
Preparation method of cement-based material with optimized carbon absorption efficiency Download PDFInfo
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- CN116003057A CN116003057A CN202211681724.8A CN202211681724A CN116003057A CN 116003057 A CN116003057 A CN 116003057A CN 202211681724 A CN202211681724 A CN 202211681724A CN 116003057 A CN116003057 A CN 116003057A
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- 239000000463 material Substances 0.000 title claims abstract description 104
- 239000004568 cement Substances 0.000 title claims abstract description 82
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 41
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 41
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 25
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 48
- 239000000696 magnetic material Substances 0.000 claims abstract description 35
- 238000000034 method Methods 0.000 claims abstract description 35
- 239000000843 powder Substances 0.000 claims abstract description 34
- 229910052742 iron Inorganic materials 0.000 claims abstract description 24
- 238000009826 distribution Methods 0.000 claims abstract description 20
- 239000002910 solid waste Substances 0.000 claims abstract description 20
- 239000011148 porous material Substances 0.000 claims abstract description 16
- 230000005540 biological transmission Effects 0.000 claims abstract description 15
- 239000002002 slurry Substances 0.000 claims abstract description 13
- 239000007783 nanoporous material Substances 0.000 claims abstract description 12
- 238000005457 optimization Methods 0.000 claims abstract description 7
- 238000004891 communication Methods 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 238000000498 ball milling Methods 0.000 claims description 16
- 239000003638 chemical reducing agent Substances 0.000 claims description 12
- 239000002245 particle Substances 0.000 claims description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- 239000005543 nano-size silicon particle Substances 0.000 claims description 8
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 8
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 6
- 230000003068 static effect Effects 0.000 claims description 6
- 229910021536 Zeolite Inorganic materials 0.000 claims description 5
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 5
- 239000010457 zeolite Substances 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 4
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 4
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 4
- 230000000630 rising effect Effects 0.000 claims description 4
- 238000001179 sorption measurement Methods 0.000 claims description 3
- 239000011398 Portland cement Substances 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 229920005646 polycarboxylate Polymers 0.000 description 3
- 239000002344 surface layer Substances 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000003469 silicate cement Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002715 modification method Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a preparation method of a cement-based material with optimized carbon absorption efficiency, which comprises the following steps: (1) Adsorbing the nano porous material on the surface of the iron-containing solid waste to form a powder material A which can optimize the carbon transmission efficiency of the cement-based material; (2) Arranging magnetic materials on at least one of the upper top surface and the side surface of the die, enabling the polarities of the magnetic materials on the inner wall of the die to be the same, adsorbing powder materials A on the surface of the magnetic materials, controlling the distribution form of the powder materials A on the surface of the magnetic materials, enabling the powder materials A to be regularly arranged on the surface of the magnetic materials, and enabling the powder materials A to have communication characteristics; (3) Pouring the cement-based slurry material from a pouring inlet on the lower bottom surface of the die to the top of the die, and demoulding after hardening to form the cement-based material with improved carbon transmission efficiency due to structural optimization. The method effectively solves the technical problem of controlling the distribution of the porous materials in the cement-based material, and makes scientific design of the high-efficiency carbon-fixing cement-based material possible.
Description
Technical Field
The invention relates to a preparation method of a cement-based material, in particular to a preparation method of a cement-based material with optimized carbon absorption efficiency.
Background
The porous material is added into the cement-based material, so that the carbon dioxide absorption capacity of the cement-based material can be improved, the method is an important method for improving the carbon fixation level of the cement-based material, and the method has important significance for realizing carbon neutralization in the cement industry in the early days. The different distribution of porous materials in cement-based materials gives the difference in their transport structure, resulting in a difference in carbon absorption efficiency. When the traditional raw material mixing method is adopted to prepare the cement-based material, the control of the position distribution of the porous material is a technical problem, so that the carbon absorption efficiency of the cement-based material can not be effectively controlled, and the scientific design and optimization improvement of the high-efficiency carbon fixing capability are limited.
Disclosure of Invention
The invention aims to provide a preparation method of a cement-based material with optimized carbon absorption efficiency, which utilizes magnetic force to control the position distribution of iron-containing solid waste particles, indirectly controls the distribution of porous materials on the surface (upper surface and side surface) of the cement-based material, effectively solves the technical problem of controlling the distribution of the porous materials in the cement-based material, and enables scientific design of high-efficiency carbon-fixing cement-based material to be possible.
The invention aims at realizing the following technical scheme:
a method for preparing a cement-based material with optimized carbon absorption efficiency, comprising the following steps:
the method comprises the following steps of (1) modifying iron-containing solid waste: adsorbing the nano porous material on the surface of the iron-containing solid waste to form a powder material A for optimizing the carbon transmission efficiency of the cement-based material, wherein:
the iron content of the iron-containing solid waste is 11-14.5%, the granularity is 150-200 mu m, and the doping amount is 10-25% of the cement mass;
the nano porous material can be one or more of nano porous materials such as nano biochar, nano zeolite and the like, and the doping amount is 5-12.5% of the volume of the die;
the particle size of the nano biochar is 105-220 nm, and the pore volume is 0.04-0.08 cm 3 The mixing amount per gram is 7.5-12.5% of the volume of the die;
the particle size of the nano zeolite is 101-210 nm, and the pore volume is 0.65-0.85 cm 3 The mixing amount is 5-8% of the volume of the die;
the modification method is a ball milling method or an electrostatic adsorption method, when the ball milling method is adopted to modify the iron-containing solid waste, zirconia balls with the equal particle diameter of 5 mm-10 mm are selected as ball milling balls, the ball milling time is 30-60 minutes, the revolution speed of a ball milling tank is 180-200 rpm, the rotation speed is 400-420 rpm, and the volume ratio of ball materials is 1.9:1.1, the volume ratio of the ball material to the ball milling tank is 4:5, a step of; when the static adsorption method is adopted to modify the iron-containing solid waste, a static generator is used for generating static electricity, the voltage is 5.5-6.2 kV, the pressure boost is 0.6kV, positive and negative mixing is adopted as discharge electrode polarity, the discharge mode is air discharge, the discharge mode is automatic discharge, the interval is 1s, and the total times are 6000-8000;
controlling the distribution form of the powder material A by using a magnetic material to form a structural body capable of optimizing the carbon transmission efficiency of the cement-based material, wherein the concrete method comprises the following steps: arranging magnetic materials on at least one of the upper top surface, the left side surface and the right side surface of the die, enabling the polarities of the magnetic materials on the inner wall of the die to be the same, adsorbing the powder material A obtained in the first step on the surface of the magnetic materials, and controlling the distribution form of the powder material A on the surface of the magnetic materials by adopting a manual or machine control method so that the powder material A is regularly arranged on the surface of the magnetic materials and has a communication characteristic;
step (3) pouring cement-based slurry materials from a pouring inlet at the lower bottom surface of a die to the top of the die, and demoulding after hardening to form cement-based materials with improved carbon transmission efficiency due to structural optimization, wherein:
the mold material is polymethyl methacrylate, and the color is transparent;
the cement-based slurry material consists of ordinary Portland cement, water, a water reducer, nano silicon oxide and the like, wherein the cement fineness is 32-38 mu m, the water cement ratio is 0.28-0.18, the water reducer is a polycarboxylate water reducer, the mixing amount is 0.5-2.5% of the cement mass, and the mixing amount of the nano silicon oxide is 0.8-1.2% of the cement mass;
the rising speed of the cement-based slurry material is 1.5-2.5 mm/s, and the demolding time is 50-80 h.
Compared with the prior art, the invention has the following advantages:
(1) According to the invention, the porous transmission characteristics of the porous materials in the cement-based materials are designed by controlling the distribution positions of the porous materials, so that the carbon absorption efficiency is controllable and optimized, and the effect of improving the carbon absorption capacity under the condition of the same raw material mixing ratio is achieved.
(2) The surface structure of the cement-based material is the part that first contacts and absorbs carbon dioxide. According to the invention, the distribution of porous materials in the surface layer structure (the upper surface layer and the side surface layer) is controlled, so that the accurate optimization of carbon absorption efficiency is realized.
(3) The invention can accurately improve the carbon absorption capacity of the cement-based material, and a proper amount of porous materials are used, so that the cost increase and the adverse effect on the mechanical properties of the cement-based material are limited.
Drawings
FIG. 1 shows the distribution of powder material A on the surface of a magnetic material;
FIG. 2 shows the structure of the powder material A extending outwards from the surface of the magnetic material;
fig. 3 shows the positional relationship between the magnetic material and the powder material a in the mold.
Detailed Description
The following description of the present invention is provided with reference to the accompanying drawings, but is not limited to the following description, and any modifications or equivalent substitutions of the present invention should be included in the scope of the present invention without departing from the spirit and scope of the present invention.
Example 1:
the embodiment provides a preparation method of a cement-based material with optimized carbon absorption efficiency, which comprises the following steps:
the method comprises the following steps of (1) modifying iron-containing solid waste: the method of ball milling the nano porous material and the iron-containing solid waste together is adopted, the nano porous material is adsorbed on the surface of the iron-containing solid waste particles, so as to form a powder material A for optimizing the carbon transmission efficiency of the cement-based material, wherein:
the iron content of the iron-containing solid waste is 12%, the granularity is 150 mu m, and the mixing amount is 15% of the cement mass;
the nano porous material is nano biochar with the particle diameter of 150nm and the pore volume of 0.06 cm 3 The mixing amount per gram is 10 percent of the volume of the die;
zirconia balls with the equal particle diameter of 10mm are selected as the ball-milling balls, the ball-milling time is 60 minutes, the revolution speed of a ball-milling tank is 180 rpm, the rotation speed is 400 rpm, and the volume ratio of ball materials is 1.9:1.1, the volume ratio of the ball material to the ball milling tank is 4:5.
controlling the distribution form of the powder material A by using a magnetic material to form a structural body capable of optimizing the carbon transmission efficiency of the cement-based material, wherein the concrete method comprises the following steps: the magnetic materials are arranged on the upper top surface and the left side surface of the die, so that the polarities of the magnetic materials on the inner wall of the die are the same, the powder material A obtained in the first step is adsorbed on the surface of the magnetic materials, the distribution form of the powder material A on the surface of the magnetic materials is controlled by adopting a manual or machine control method, the powder material A is regularly arranged on the surface of the magnetic materials, the powder material A has a communication characteristic, the distribution form is shown in figure 1, and the structure of the powder material A extending to the surface of the magnetic materials is shown in figure 2.
And (3) pouring the cement-based slurry material from a pouring inlet M at the lower bottom surface of the die to the top of the die, and demoulding after hardening to form the cement-based material with improved carbon transmission efficiency due to structural optimization, wherein the positional relationship between the magnetic material and the powder material A in the die is shown in fig. 3, and the following steps are that:
the mold material is polymethyl methacrylate, and the color is transparent;
the cement-based slurry material consists of ordinary silicate cement, water, a water reducing agent, nano silicon oxide and the like, wherein the cement fineness is 35 mu m, the water cement ratio is 0.22, the water reducing agent is a polycarboxylate water reducing agent, the mixing amount is 1.5% of the cement mass, and the mixing amount of the nano silicon oxide is 1.0% of the cement mass;
the rising speed of the cement-based slurry material is 2.0mm/s, and the demolding time is 60h.
Example 2:
the embodiment provides a preparation method of a cement-based material with optimized carbon absorption efficiency, which comprises the following steps:
the method comprises the following steps of (1) modifying iron-containing solid waste: the method comprises the steps of adopting an electrostatic generator to enable the surface of the iron-containing solid waste to generate static electricity, adsorbing the nano porous material to form a powder material A for optimizing the carbon transmission efficiency of the cement-based material, wherein:
the iron content of the iron-containing solid waste is 13.5%, the granularity is 180 mu m, and the doping amount is 20% of the cement mass;
the nano porous material is nano zeolite, the grain diameter is 180nm, and the pore volume is 0.75cm 3 The mixing amount per gram is 6% of the volume of the mould;
the voltage of the electrostatic generator is 5.8kV, the voltage boost is 0.6kV, positive and negative mixtures are selected as discharge electrode characteristics, the discharge mode is air discharge, the discharge mode is automatic discharge, the interval is 1s, and the total times are 7000 times.
Controlling the distribution form of the powder material A by using a magnetic material to form a structural body capable of optimizing the carbon transmission efficiency of the cement-based material, wherein the concrete method comprises the following steps: the magnetic materials are arranged on the upper top surface, the left side surface and the right side surface of the die, so that the polarities of the magnetic materials on the inner wall of the die are the same, the powder material A obtained in the first step is adsorbed on the surface of the magnetic material, the distribution form of the powder material A on the surface of the magnetic material is controlled by adopting a manual or machine control method, the powder material A is regularly arranged on the surface of the magnetic material, the powder material A has communication characteristics, the distribution form is shown in figure 1, and the structure of the powder material A extending to the surface of the magnetic material is shown in figure 2.
Step (3) pouring the cement-based slurry material from a pouring inlet M at the lower bottom surface of the die to the top of the die, and demoulding after hardening to form the cement-based material with improved carbon transmission efficiency due to structural optimization, wherein:
the mold material is polymethyl methacrylate, and the color is transparent;
the cement-based slurry material consists of ordinary silicate cement, water, a water reducing agent, nano silicon oxide and the like, wherein the cement fineness is 33 mu m, the water cement ratio is 0.25, the water reducing agent is a polycarboxylate water reducing agent, the mixing amount is 2.0% of the cement mass, and the mixing amount of the nano silicon oxide is 0.8% of the cement mass;
the rising speed of the cement-based slurry material is 1.8mm/s, and the demolding time is 70h.
Claims (10)
1. A method for preparing a cement-based material with an optimized carbon absorption efficiency, characterized in that it comprises the steps of:
the method comprises the following steps of (1) modifying iron-containing solid waste: adsorbing the nano porous material on the surface of the iron-containing solid waste to form a powder material A for optimizing the carbon transmission efficiency of the cement-based material, wherein: the mixing amount of the iron-containing solid waste is 10-25% of the mass of cement, and the mixing amount of the nano porous material is 5-12.5% of the volume of the die;
controlling the distribution form of the powder material A by using a magnetic material to form a structural body capable of optimizing the carbon transmission efficiency of the cement-based material, wherein the concrete method comprises the following steps: arranging magnetic materials on at least one of the upper top surface, the left side surface and the right side surface of the die, enabling the polarities of the magnetic materials on the inner wall of the die to be the same, adsorbing the powder material A obtained in the first step on the surface of the magnetic materials, controlling the distribution form of the powder material A on the surface of the magnetic materials, enabling the powder material A to be regularly arranged on the surface of the magnetic materials, and enabling the powder material A to have communication characteristics;
and (3) pouring the cement-based slurry material from a pouring inlet at the lower bottom surface of the die to the top of the die, and demoulding after hardening to form the cement-based material with improved carbon transmission efficiency due to structural optimization.
2. The method for preparing a cement-based material with optimized carbon absorption efficiency according to claim 1, wherein the iron content of the iron-containing solid waste is 11-14.5%, and the granularity is 150-200 μm.
3. The method for preparing a cement-based material with optimized carbon absorption efficiency according to claim 1, wherein the nano porous material is one or two of nano biochar and nano zeolite.
4. The method for preparing a cement-based material with optimized carbon absorption efficiency according to claim 3, wherein the nano biochar has a particle size of 105-220 nm and a pore volume of 0.04-0.08 cm 3 The mixing amount per gram is 7.5-12.5% of the volume of the die.
5. The method for preparing a cement-based material with optimized carbon absorption efficiency according to claim 3, wherein the nano zeolite has a particle size of 101-210 nm and a pore volume of 0.65-0.85 cm 3 And/g, wherein the doping amount is 5-8% of the volume of the die.
6. The method for preparing the cement-based material with optimized carbon absorption efficiency according to claim 1, wherein in the first step, the method for modifying the iron-containing solid waste is a ball milling method, zirconia balls with the equal particle diameter of 5 mm-10 mm are selected as ball milling balls, the ball milling time is 30-60 minutes, the revolution speed of a ball milling tank is 180-200 rpm, the rotation speed is 400-420 rpm, and the volume ratio of the balls is 1.9:1.1, the volume ratio of the ball material to the ball milling tank is 4:5.
7. the method for preparing the cement-based material with optimized carbon absorption efficiency according to claim 1, wherein in the first step, the method for modifying the iron-containing solid waste is an electrostatic adsorption method, static electricity is generated by using a static electricity generator, the voltage is 5.5-6.2 kV, the voltage is 0.6kV, positive and negative mixing is selected as discharge electrode performance, the discharge mode is air discharge, the discharge mode is automatic discharge, the interval is 1s, and the total times are 6000-8000.
8. The method for producing a cement-based material with an optimized carbon absorption efficiency according to claim 1, wherein the material of the mold is polymethyl methacrylate.
9. The preparation method of the cement-based material with the optimized carbon absorption efficiency according to claim 1, which is characterized in that the cement-based slurry material consists of ordinary Portland cement, water, a water reducing agent and nano silicon oxide, wherein the cement fineness is 32-38 mu m, the water cement ratio is 0.28-0.18, the water reducing agent is a polycarboxylic acid water reducing agent, the mixing amount is 0.5-2.5% of the cement mass, and the mixing amount of the nano silicon oxide is 0.8-1.2% of the cement mass.
10. The method for preparing a cement-based material with optimized carbon absorption efficiency according to claim 1, wherein the rising speed of the cement-based slurry material is 1.5-2.5 mm/s, and the demolding time is 50-80 h.
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|---|---|---|---|---|
| JPH11116352A (en) * | 1997-10-15 | 1999-04-27 | Asahi Glass Co Ltd | Production of porous ceramic |
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| JP2018162186A (en) * | 2017-03-24 | 2018-10-18 | 東北環境開発株式会社 | Porous concrete using zeolite |
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- 2022-12-27 CN CN202211681724.8A patent/CN116003057A/en active Pending
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