CN114014619B - Air-carbonized mortar and preparation method thereof - Google Patents

Air-carbonized mortar and preparation method thereof Download PDF

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Publication number
CN114014619B
CN114014619B CN202111519820.8A CN202111519820A CN114014619B CN 114014619 B CN114014619 B CN 114014619B CN 202111519820 A CN202111519820 A CN 202111519820A CN 114014619 B CN114014619 B CN 114014619B
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mortar
parts
air
solid
solid waste
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CN114014619A (en
Inventor
马韵升
崔东波
杨猜霞
张余鑫
张学雷
殷方园
祁泽
贺永鹏
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Shandong Hanbo Yuzhou New Material Co ltd
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Shandong Hanbo Yuzhou New Material Co ltd
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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
    • C04B28/12—Hydraulic lime
    • 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
    • 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
    • C04B2201/10—Mortars, concrete or artificial stone characterised by specific physical values for the viscosity
    • 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
    • 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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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

The invention relates to air carbonization mortar and a preparation method thereof, and the air carbonization mortar comprises the following raw materials in parts by weight: 15-30 parts of solid waste powder, 100-150 parts of mortar adhesive, 4-8 parts of admixture and 60-70 parts of water; the solid waste powder is crushed quarry solid fine material, and the mortar adhesive is a mixture of fine aggregate, quicklime and steel slag powder. The air carbonization mortar provided by the invention utilizes the regulation and control of the solid fines in the quarry to the pores of the mortar material and the CO regulation and control of the steel slag to the CO under the condition of not changing the traditional mortar production technology 2 The high absorption rate of the lime mortar improves the carbonization capacity of the lime mortar in the atmosphere, and the potential of recycling solid wastes is exerted.

Description

Air-carbonized mortar and preparation method thereof
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to air-carbonized mortar and a preparation method thereof.
Background
In contrast to cement-based composites, lime-based composites, after initial hardening by drying, are cured by CO with the atmosphere 2 The reaction of (2) is naturally carbonized and can be almost completely solidified under atmospheric conditions. Although the air lime mortar is carbonized by CO with the atmosphere 2 The chemical reactions of (a) occur naturally, but the chemical reactions are very slow and long lasting, and the whole process can last for years, which prevents their widespread use in contemporary buildings.
Disclosure of Invention
The invention aims to overcome the technical defects and provides air carbonization mortar and a preparation method thereof, so that the carbonization capacity of the lime mortar in the atmosphere is improved.
In order to achieve the technical purpose, the technical scheme of the invention is as follows:
the composite material comprises the following raw materials in parts by weight:
15-30 parts of solid waste powder, 100-150 parts of mortar adhesive, 4-8 parts of admixture and 60-70 parts of water;
the solid waste powder is crushed quarry solid fine material, and the mortar adhesive is a mixture of fine aggregate, quicklime and steel slag powder.
Furthermore, the particle size of the solid waste powder is 10-30 μm.
Further, the quarry solid fines comprise one or a mixture of several of diabase, olivine and basalt in any proportion.
Furthermore, the particle size of the fine aggregate is 1-2 mm; the fine aggregate is prepared from (43-47) by mass: (17 to 19): (11-13): (7-8): (5-7) a mixture of calcite, albite, quartz, anorthite and dolomite.
Furthermore, the grain size of the steel slag powder is 30-60 μm; the steel slag powder contains 0.1 to 1.5 mass percent of CaO.
Further, the weight ratio of the steel slag powder to the quick lime is 1: (6-7); the weight ratio of the mortar adhesive to the fine aggregate is (3-3.5): 1.
further, the admixture comprises 3-5 parts of a water reducing agent and 1-3 parts of a retarder.
Further, the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent or a naphthalene high-efficiency water reducing agent; the retarder is lignosulfonate.
The technical scheme of the preparation method of the air carbonization mortar is as follows: the method comprises the following steps: and (3) uniformly mixing the solid waste powder with the mortar adhesive, and then adding the admixture and water to uniformly mix to obtain the air carbonized mortar.
Furthermore, the solid waste powder is prepared from quarry solid fines by a ball milling method, the ball milling time is 2-4 h, the water consumption is 10-50% of the quarry solid fines by mass, and the rotating speed is 300-400 rpm.
Compared with the prior art, the invention has the beneficial effects that:
in the solid fine material of quarry utilized by the inventionContains abundant calcium, magnesium and ferrum silicate minerals, can be used for sealing off carbon dioxide in different places, and can be mixed with CO 2 The reaction forms stable carbonate minerals, and has extremely high carbon fixation potential; meanwhile, the solid fine materials in the quarry are crushed to improve CO 2 Diffusivity and absorptivity. By using the steel slag powder, the carbon dioxide can be mixed with CO 2 Reacted and cemented. Therefore, the air carbonization mortar provided by the invention utilizes the regulation and control of the solid fines in the quarry to the pores of the mortar material and the CO regulation and control of the steel slag to the CO under the condition of not changing the traditional mortar production technology 2 The high absorption rate of the lime mortar improves the carbonization capability of the lime mortar in the atmosphere, exerts the potential of recycling solid wastes and unifies environmental protection and social benefits. After the mortar is cured in the air for 28 days, all mechanical strength is effectively improved, all performances reach the standard and are obviously better than those of quicklime and fine aggregate according to the mass ratio of 1:3, the compressive strength of the air-carbonized mortar is improved by 2.57-3.03 times compared with that of the blank group, and the compressive strength is effectively improved, which shows that the mortar has full carbonization reaction in the curing period and integrates CO 2 An efficient way of capture and waste resource conversion applications without the traditional carbonation process, which can last several years.
Detailed Description
The present invention is further illustrated by the following specific embodiments.
The invention discloses a preparation method of air carbonized mortar, which comprises the following steps:
(1) Mixing the quarry solid fine materials with water, uniformly dispersing, and grinding by using a planetary mill to obtain solid waste powder with the particle size of 10-30 mu m.
The particle size of the solid fine material in the quarry is below 400 μm, preferably 250-400 μm; the quarry solid fines comprise one or a mixture of several of diabase, olivine and basalt in any proportion; the grinding method is ball milling by a planet grinding wet method, the grinding time is 2-4 h, and the water consumption is 10-50% of the mass of solid fine materials in the quarry; during grinding, the quality of the grinding balls is ensured to be larger than that of the powder, the preferred ball-powder mass ratio is 18-20.
(2) Uniformly mixing the fine aggregate, the quicklime and the steel slag powder to obtain a mortar adhesive; the weight ratio of the steel slag powder to the quick lime is 1/6-1/7; the weight ratio of the mortar adhesive to the fine aggregate is (3-3.5): 1.
the particle size of the fine aggregate is 1-2 mm; the fine aggregate is prepared from (43-47) by mass: (17 to 19): (11-13): (7-8): (5-7) a mixture of calcite, albite, quartz, anorthite and dolomite. The grain size of the steel slag powder is 30-60 mu m, and the steel slag powder contains 0.1-1.5 mass percent of CaO.
(3) And (2) uniformly mixing 15-30 parts of the solid waste powder prepared in the step (1) and 100-150 parts of the mortar adhesive prepared in the step (2), adding 3-5 parts of a water reducing agent, 1-3 parts of a retarder and 60-70 parts of water, and strongly stirring uniformly to obtain the air carbonized mortar.
The water reducing agent is a polycarboxylic acid high-efficiency water reducing agent or a naphthalene high-efficiency water reducing agent; the retarder is lignosulfonate.
The air carbonization mortar prepared by the invention uses solid wastes as renewable resources, and realizes the carbonization function of solid fines and steel slag powder in a quarry under natural conditions 2 For CO 2 Curing warfare is of little importance.
The air carbonization mortar of the invention can comprise external admixtures such as water reducing agent and retarder, which are executed according to the concrete admixture specification (BB 807-2016).
The solid fine materials of the quarry comprise quarry waste particles and powder, and are solid wastes, and the invention uses the solid wastes rich in calcium, magnesium and iron for the remote storage of carbon dioxide, and is an effective way for treating the carbon dioxide discharged by the industry. The invention applies the ball milling process to the solid waste to prepare the carbon dioxide with CO 2 A material with an adsorptive capacity. Meanwhile, the introduction of the ground steel slag and the quarry solid waste into the lime mortar is beneficial to the reutilization of the solid waste on one hand and the super-strong CO of the solid waste on the other hand 2 The adsorption capacity enhances the short-term strength of the lime mortar, and is an economically and technically feasible carbon dioxide emission reduction mode.
Pore structure of mortarAnd the pore size distribution is to control CO in the atmosphere 2 Through the main factors of microstructure diffusion, the pore size distribution is continuously changed along with the carbonization, so that the method has important significance for modifying the pore structure.
The contents of calcium, magnesium and iron silicate minerals in the solid waste of the quarry are high, and the mineral can be mixed with CO 2 Stable carbonate mineral is formed by reaction, has extremely high carbon fixing potential, and the particle size of the carbonate mineral is further reduced by a ball milling process before diabase and other quarry wastes are added into the lime mortar, which is beneficial to improving CO 2 Diffusivity and absorptivity.
The steel slag as an industrial solid waste has the problems of high yield and low utilization rate. The main mineral phase in the steel slag is calcium silicate, and when newly solidified calcium silicate exists as polychrome in the steel slag, the calcium silicate can react with CO 2 And the reaction is cemented, so that the effective utilization of secondary resources is realized.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Blank group
Referring to 'Guangdong province building and decoration engineering integrated quota' (8003041), mixing quicklime and fine aggregate according to a mass ratio of 1:3, preparing the lime mortar. The fine aggregate source was the same as in example 1.
Example 1
The embodiment of the invention provides a production method of air carbonized mortar, which comprises the following components in parts by weight:
(1) 20 parts of quarry fine aggregate with the grain diameter of 250-300 mu m, 2 parts of water and 180 parts of agate grinding balls are placed in a planetary mill for grinding for 2 hours at the rotating speed of 300rpm according to the mass ratio, and solid waste powder with the grain diameter of 10-15 mu m is obtained after drying.
The solid fine material of the quarry adopts diabase, olivine and basalt with the mass ratio of 1:1: 1.
(2) Uniformly mixing 10 parts of steel slag powder with the particle size of 30-35 mu m, 60 parts of quicklime and 35 parts of fine aggregate with the particle size of 1-1.5 mm, adding 15 parts of the solid waste powder, 3 parts of the naphthalene-based superplasticizer, 1 part of retarder and 60 parts of water, and strongly stirring uniformly to obtain the air carbonization mortar.
The fine aggregate is prepared from the following components in percentage by mass of 45:18:12:7.5:6 calcite, albite, quartz, anorthite and dolomite.
The steel slag powder contains 1 mass percent of CaO.
The retarder is lignosulfonate.
Example 2
The embodiment of the invention provides a production method of air carbonized mortar, which comprises the following components in parts by weight:
(1) 20 parts of quarry fine aggregate with the grain diameter of 350-400 mu m, 10 parts of water and 200 parts of agate grinding balls are placed in a planetary mill for grinding for 4 hours at the rotating speed of 400rpm according to the mass ratio, and solid waste powder with the grain diameter of 10-30 mu m is obtained after drying.
The weight ratio of diabase, olivine and basalt in the solid fine materials of the quarry is 1:1: 1.
(2) Uniformly mixing 10 parts of steel slag powder with the particle size of 50-60 mu m, 70 parts of quicklime and 40 parts of fine aggregate with the particle size of 1-1.5 mm, adding 25 parts of the solid waste powder, 5 parts of polycarboxylic acid high-efficiency water reducing agent, 3 parts of retarder and 70 parts of water, and strongly stirring uniformly to obtain the air carbonization mortar.
The fine aggregate, steel slag powder and retarder were the same as in example 1.
Example 3
The embodiment of the invention provides a production method of air carbonized mortar, which comprises the following components in parts by weight:
(1) 20 parts of quarry fine aggregate with the grain diameter of 350-400 mu m, 10 parts of water and 200 parts of agate grinding balls are placed in a planetary mill for grinding for 4 hours at the rotating speed of 400rpm according to the mass ratio, and solid waste powder with the grain diameter of 10-30 mu m is obtained after drying.
The solid fine material of the quarry adopts diabase, olivine and basalt with the mass ratio of 1:1: 1.
(2) Uniformly mixing 10 parts of steel slag powder with the particle size of 50-60 mu m, 70 parts of quicklime and 40 parts of fine aggregate with the particle size of 1mm, adding 25 parts of the solid waste powder, 5 parts of polycarboxylic acid high-efficiency water reducing agent, 3 parts of retarder and 70 parts of water, and strongly stirring uniformly to obtain the air carbonization mortar.
The fine aggregate, steel slag powder and retarder were the same as in example 1.
Example 4
The embodiment of the invention provides a production method of air carbonized mortar, which comprises the following components in parts by weight:
(1) 20 parts of quarry fine aggregate with the grain diameter of 350-400 mu m, 10 parts of water and 200 parts of agate grinding balls are placed in a planetary mill for grinding for 4 hours at the rotating speed of 400rpm according to the mass ratio, and solid waste powder with the grain diameter of 10-30 mu m is obtained after drying.
The solid fine material of the quarry adopts diabase, olivine and basalt with the mass ratio of 1:1: 1.
(2) Uniformly mixing 10 parts of steel slag powder with the particle size of 50-60 mu m, 70 parts of quicklime and 40 parts of fine aggregate with the particle size of 1mm, adding 15 parts of the solid waste powder, 5 parts of polycarboxylic acid high-efficiency water reducing agent, 3 parts of retarder and 70 parts of water, and strongly stirring uniformly to obtain the air carbonization mortar.
The fine aggregate, steel slag powder and retarder were the same as in example 1.
Example 5
The embodiment of the invention provides a production method of air carbonized mortar, which comprises the following components in parts by weight:
(1) 30 parts of quarry fine aggregate with the grain diameter of 300-350 mu m, 5 parts of water and 300 parts of agate grinding balls are placed in a planetary mill for grinding for 3 hours at the rotating speed of 300rpm according to the mass ratio, and solid waste powder with the grain diameter of 10-25 mu m is obtained after drying.
The solid fine material of the quarry adopts diabase, olivine and basalt with the mass ratio of 1:2:2, or a mixture thereof.
(2) Uniformly mixing 10 parts of steel slag powder with the particle size of 35-45 mu m, 65 parts of quicklime and 30 parts of fine aggregate, adding 25 parts of the solid waste powder, 4 parts of the naphthalene-based superplasticizer, 2 parts of the retarder and 65 parts of water, and strongly stirring uniformly to obtain the air carbonization mortar.
The fine aggregate, steel slag powder and retarder were the same as in example 1.
Example 6
The embodiment of the invention provides a production method of air carbonized mortar, which comprises the following components in parts by weight:
(1) 20 parts of quarry fine aggregate with the grain diameter of 260-300 mu m, 2 parts of water and 400 parts of agate grinding balls are placed in a planetary mill for grinding for 2.4 hours at the rotating speed of 320rpm according to the mass ratio, and solid waste powder with the grain diameter of 10-20 mu m is obtained after drying.
The mass ratio of diabase to basalt of the solid fine materials in the quarry is 1: 1.
(2) Uniformly mixing 10 parts of steel slag powder with the particle size of 40-50 mu m, 70 parts of quicklime and 32 parts of fine aggregate with the particle size of 2mm, adding 15 parts of the solid waste powder, 3 parts of polycarboxylic acid high-efficiency water reducing agent, 2 parts of retarder and 70 parts of water, and strongly stirring uniformly to obtain the air carbonization mortar.
The fine aggregate is prepared from 47 mass percent: 19:13:8:7 calcite, albite, quartz, anorthite and dolomite.
The steel slag powder contains 0.5 mass percent of CaO.
The retarder is lignosulfonate.
Example 7
The embodiment of the invention provides a production method of air carbonized mortar, which comprises the following components in parts by weight:
(1) 14 parts of quarry fine aggregate with the grain diameter of 350-400 mu m, 10 parts of water and 200 parts of agate grinding balls are placed in a planetary mill for grinding for 4 hours at the rotating speed of 300rpm according to the mass ratio, and solid waste powder with the grain diameter of 10-25 mu m is obtained after drying.
Diabase is used as the solid fine material in quarry.
(2) Uniformly mixing 10 parts of steel slag powder with the particle size of 45-60 mu m, 60 parts of quicklime and 28 parts of fine aggregate with the particle size of 1mm, adding 25 parts of the solid waste powder, 5 parts of polycarboxylic acid high-efficiency water reducing agent, 2 parts of retarder and 60 parts of water, and strongly stirring uniformly to obtain the air carbonization mortar.
The fine aggregate is 43:17:11:7:5 calcite, albite, quartz, anorthite, and dolomite.
The steel slag powder contains 1.5 mass percent of CaO.
The retarder is lignosulfonate.
The relative performance profiles of the articles of the above examples are shown in table 1.
The performance test method of the air carbonization mortar refers to 'masonry and plastering dry mixed mortar for buildings' (JG/T291-2011), and the test is carried out when the product is maintained at constant temperature for 28 days under the air condition.
TABLE 1 mortar Performance test made in the blanks of the invention and in examples 1 to 7
Adhesive Strength (MPa) Compressive strength (MPa) Fluidity (not less than 200 mm)
Blank group 0.45 1.8 158
Example 1 0.55 4.62 212
Example 2 0.66 5.21 218
Example 3 0.69 5.38 223
Example 4 0.59 4.93 209
Example 5 0.63 5.41 221
Example 6 0.67 5.46 215
Example 7 0.62 5.34 223
Compared with a blank group, the air carbonization mortar prepared by the invention has the advantages that various mechanical strengths are effectively improved after being cured in air for 28 days, the bonding strength reaches 0.55-0.69 MPa, the compressive strength is 4.62-5.46 MPa, the fluidity is 209-223 mm, and various performances are obviously superior to those of the blank group; the compressive strength of the air carbonization mortar prepared by the invention is effectively improved compared with that of a blank group, which shows that the air carbonization mortar has full carbonization reaction in a curing period and integrates CO 2 Efficient means of capturing and discarding resource transformation applications.
Comparative example 1
And (3) investigating the influence of solid waste powder with different particle sizes on the performance of the obtained mortar.
The solid waste powders of example 3 were replaced with solid waste powders having particle sizes of less than 10 μm and greater than 40 μm, respectively, and the mortar obtained was tested under the same conditions as in example 3, respectively, and the results are shown in Table 2.
TABLE 2 mortar property test prepared in comparative example 1 of the present invention
Figure BDA0003408325320000071
As can be seen from Table 2, when the particle size of the solid waste powder is too large, the relative surface area decreases, the porosity of the mortar system decreases, and CO is hindered to some extent 2 The reaction rate and diffusion range with the active ingredient; when the particle size is too small, the surface carbonization reaction is too fast, the internal effective components are wrapped by the reaction products, and CO 2 The subsequent carbonization reaction can not be carried out by breaking the external barrier, the reaction efficiency of the mortar is reduced, and the mechanical property of the mortar is influenced, so the preferable particle size range of the solid waste powder is 10-30 mu m.
Comparative example 2
And (3) investigating the influence of the steel slag powder with different particle sizes on the performance of the obtained mortar.
The steel slag powder of example 3 was replaced with steel slag powder having a particle size of less than 30 μm and greater than 60 μm, respectively, and the mortar obtained was tested under the same conditions as in example 3, respectively, and the mortar was found to have an adverse effect on the mortar, similar to that of comparative example 1, i.e., too large or too small a particle size.
Comparative example 3
And (3) investigating the influence of different amounts of solid waste powder on the performance of the obtained mortar.
The mortar obtained was tested by adjusting the amounts of the solid waste powders to 0 part, 5 parts, 30 parts and 40 parts, respectively, and the other conditions were the same as in example 3, and the results are shown in table 3 below:
the results show that the solid waste powder is not doped or the dosage of the solid waste powder is too small, and the mechanical property of the mortar is improved slightly; when the mixing amount of the solid waste powder is 40 parts, the mechanical property is slightly lower than that of 30 parts, and the compressive strength is gradually reduced after the mixing amount exceeds 20 parts, so that the mixing amount of the solid waste powder is preferably in a range of 15-30 parts.
TABLE 3 mortar property test prepared by comparative example 3 of the present invention
Adhesive Strength (MPa) Compressive strength (MPa) Fluidity (mm)
Example 3 0.69 5.38 223
0 portion of solid waste powder 0.45 3.82 208
5 portions of solid waste powder 0.52 4.17 211
30 portions of solid waste powder 0.62 5.03 218
40 portions of solid waste powder 0.60 4.96 215
The above-described embodiments of the present invention should not be construed as limiting the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. The air carbonization mortar is characterized in that: the composite material comprises the following raw materials in parts by weight:
15-30 parts of solid waste powder, 100-150 parts of mortar adhesive, 4-8 parts of admixture and 60-70 parts of water;
the solid waste powder is crushed quarry solid fine material, and the mortar adhesive is a mixture of fine aggregate, quicklime and steel slag powder;
the weight ratio of the steel slag powder to the quick lime is 1: (6-7).
2. The air-carbonized mortar of claim 1, wherein: the particle size of the solid waste powder is 10-30 mu m.
3. The air carbonization mortar of claim 1, wherein: the quarry solid fines comprise one or a mixture of several of diabase, olivine and basalt in any proportion.
4. The air-carbonized mortar of claim 1, wherein: the particle size of the fine aggregate is 1-2 mm; the fine aggregate is prepared from (43-47) by mass: (17 to 19): (11-13): (7-8): (5-7) a mixture of calcite, albite, quartz, anorthite and dolomite.
5. The air carbonization mortar of claim 1, wherein: the grain size of the steel slag powder is 30-60 mu m; the steel slag powder contains 0.1 to 1.5 mass percent of CaO.
6. The air carbonization mortar of claim 1, wherein: the weight ratio of the mortar adhesive to the fine aggregate is (3-3.5): 1.
7. the air carbonization mortar of claim 1, wherein: the admixture comprises 3-5 parts of water reducing agent and 1-3 parts of retarder.
8. An air carbonation mortar according to claim 7 wherein: the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent or a naphthalene high-efficiency water reducing agent; the retarder is lignosulfonate.
9. The method for preparing air-carbonized mortar of claim 1, wherein: the method comprises the following steps: and (3) uniformly mixing the solid waste powder with the mortar adhesive, and then adding the admixture and water to uniformly mix to obtain the air carbonized mortar.
10. The method for preparing air-carbonized mortar according to claim 9, characterized in that: the solid waste powder is prepared from quarry solid fines by a ball milling method, the ball milling time is 2-4 h, the water consumption is 10-50% of the mass of the quarry solid fines, and the rotating speed is 300-400 rpm.
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Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Recycling and utilization of high volume converter steel slag into CO2 activated mortars–The role of slag particle size;Gang Liu等;《Resources, Conservation & Recycling》;20200518;第160卷(第104883期);第1-9页 *

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