CN113387650A - Carbon-fixing type multifunctional high-strength pervious concrete, preparation method thereof and pavement - Google Patents
Carbon-fixing type multifunctional high-strength pervious concrete, preparation method thereof and pavement Download PDFInfo
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- 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
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- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
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- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
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- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/36—Inorganic materials not provided for in groups C04B14/022 and C04B14/04 - C04B14/34
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- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
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- 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
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- 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
- C04B28/021—Ash cements, e.g. fly ash cements ; Cements based on incineration residues, e.g. alkali-activated slags from waste incineration ; Kiln dust cements
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- 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
- C04B28/06—Aluminous cements
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- 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
- C04B28/06—Aluminous cements
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- 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
- C04B28/08—Slag cements
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/10—Coherent pavings made in situ made of road-metal and binders of road-metal and cement or like binders
- E01C7/14—Concrete paving
- E01C7/142—Mixtures or their components, e.g. aggregate
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- 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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- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00284—Materials permeable to liquids
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- C04B2111/00612—Uses not provided for elsewhere in C04B2111/00 as one or more layers of a layered structure
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- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
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- 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
- C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
Abstract
The application belongs to the technical field of building materials, and particularly relates to carbon-fixing type multifunctional high-strength pervious concrete, a preparation method thereof and a pavement. The application provides multi-functional high strength pervious concrete of solid carbon type includes: a base layer composition and a top layer composition; the composite material comprises the following components in percentage by mass: 5-16% of cement, 1-4% of superfine silica powder, 1-6% of carbonized waste concrete powder, 5-15% of carbonized waste concrete fine aggregate, 60-75% of carbonized waste coarse aggregate, 1.5-3% of water and 0.3-0.8% of polycarboxylic acid water reducer; the composite material comprises the following components in percentage by mass: 5-16% of cement, 1-4% of superfine silicon powder, 1-6% of carbonized waste concrete powder, 65-80% of glass aggregate, 1.5-3% of water, 0.3-0.8% of polycarboxylate superplasticizer, 0.1-3% of photocatalyst and 0.2-3% of pigment. The present application provides high strength and high permeability characteristics concrete.
Description
Technical Field
The application belongs to the technical field of building materials, and particularly relates to carbon-fixing type multifunctional high-strength pervious concrete, a preparation method thereof and a pavement.
Background
The use of pervious concrete is an effective way to deal with environmental problems such as flooding groundwater, reducing rain retention, reducing urban heat island effects, etc. Particularly, in southern areas of China, rainwater is abundant in summer, and how to strengthen rainwater management and relieve waterlogging is an urgent problem to be solved. Therefore, the pervious concrete has been widely used in the fields of parking lots, drainage systems, park green lanes, and the like. However, pervious concrete generally has low compressive strength and durability because it contains a large number of pores. In recent years, as the functionality of sponge cities is more and more prominent, the interest in whether pervious concrete can be applied to cities and expressways is increasing. This requires that the pervious concrete have a high strength to meet the requirements of the driving road.
Although pervious concrete has been developed for many years, most of the produced pervious concrete has difficulty in breaking through 50MPa in strength, and is basically used for pedestrian roads due to low strength and single function. The application range of the road can not be expanded, such as roads with high requirements on strength, such as urban driving roads and the like.
Disclosure of Invention
Based on the concrete, the carbon-fixing type multifunctional high-strength pervious concrete, the preparation method thereof and the pavement are provided, and the concrete has the characteristics of high strength and high water permeability and effectively solves the problems of low strength and single purpose of the existing pervious concrete.
The application provides in a first aspect solid multi-functional high strength pervious concrete of carbon type, include:
a base layer composition and a top layer composition;
the base layer composition comprises the following components in percentage by mass:
the surface layer composition comprises the following components in percentage by mass:
in another embodiment, in the carbon-fixing type multifunctional high-strength pervious concrete, the mass percentage of the base layer composition is 10% -95%, and the mass percentage of the surface layer composition is 5% -90%.
In another embodiment, in the carbon-fixing type multifunctional high-strength pervious concrete, the mass percentage of the base layer composition is 60% -95%, and the mass percentage of the surface layer composition is 5% -40%.
In another embodiment, the average particle size of the carbonized waste concrete powder is less than 100 μm; the carbonized waste concrete powder is selected from gas carbonized waste concrete powder or/and liquid carbonized waste concrete powder; the gas carbonization waste concrete powder is obtained by carbonizing waste concrete powder and carbon dioxide gas in a closed container; the liquid carbonized waste concrete powder is obtained by introducing carbon dioxide gas into a mixed liquid of water and waste concrete powder for carbonization treatment.
In another embodiment, the carbonized waste concrete powder has a particle size of less than 50 μm.
In another embodiment, in the preparation method of the carbonized waste concrete powder, the concentration of carbon dioxide subjected to carbonization is 10-100%, the carbonization time is 10-10000 minutes, and the carbonization temperature is 10-40 ℃.
In another embodiment, in the preparation method of the carbonized waste concrete powder, the concentration of the carbonized carbon dioxide is 20-100%, and the carbonization time is 0.5-24 hours.
In another embodiment, the average particle size of the carbonized waste concrete fine aggregate is less than 2.36 mm; the carbonized waste concrete fine aggregate is selected from gas carbonized waste concrete fine aggregate or/and liquid carbonized waste concrete fine aggregate; the liquid carbonized waste concrete fine aggregate is obtained by carbonizing waste concrete fine aggregate and carbon dioxide gas in a closed container; the gas carbonization waste concrete fine aggregate is obtained by introducing carbon dioxide gas into a mixed solution of water and the waste concrete fine aggregate for carbonization treatment.
In another embodiment, the average particle size of the carbonized waste concrete fine aggregate is less than 1.18 mm.
Specifically, in the preparation method of the carbonized waste concrete fine aggregate, the concentration of carbon dioxide subjected to carbonization is 10-100%, the carbonization time is 10-10000 minutes, and the carbonization temperature is 10-40 ℃.
In another embodiment, in the preparation method of the carbonized waste concrete powder, the concentration of the carbonized carbon dioxide is 30-100%, and the carbonization time is 0.5-24 hours.
In another embodiment, the average particle size of the carbonized waste coarse aggregate is 2.36-14 mm; the carbonized waste coarse aggregate is selected from one or more of gas carbonized crushed concrete aggregate, gas carbonized steel slag and gas carbonized incineration waste bottom ash; the gas carbonization crushed concrete aggregate is obtained by carbonizing the crushed concrete aggregate and carbon dioxide gas in a closed container; the gas carbonized steel slag is obtained by carbonizing steel slag and carbon dioxide gas in a closed container; the gas carbonization waste incineration furnace bottom ash is obtained by carbonizing waste incineration furnace bottom ash and carbon dioxide gas in a closed container.
Specifically, in the preparation method of the gas carbonized crushed concrete aggregate, the gas carbonized incineration waste bottom ash and the gas carbonized steel slag, the concentration of the carbon dioxide subjected to carbonization treatment is 10-100%, the carbonization time is 10-10000 minutes, and the carbonization temperature is 10-40 ℃.
In another embodiment, in the preparation method of the gas carbonized crushed concrete aggregate, the gas carbonized incineration waste bottom ash and the gas carbonized steel slag, the concentration of the carbon dioxide subjected to carbonization treatment is 30-100%, and the carbonization time is 8-24 hours.
Specifically, the incinerator bottom ash is the conventional incinerator bottom ash.
Specifically, the carbonized waste coarse aggregate is selected from one or more of urban solid waste or tailings.
The carbonized waste concrete powder, the carbonized waste concrete fine aggregate and the carbonized waste coarse aggregate have different particle sizes.
In another embodiment, the cement is selected from one or more of portland cement, aluminate cement, sulphoaluminate cement, slag/fly ash portland cement, and limestone calcined clay cement; the superfine silica powder is selected from nano silicon dioxide or/and superfine silica fume.
In another embodiment, the photocatalyst is selected from one or more of titanium dioxide, zinc oxide, and zirconium dioxide; the pigment is selected from organic dye or/and iron oxide pigment, such as red iron oxide, yellow iron oxide, red organic solution, green iron oxide or yellow organic solution, etc.
In another embodiment, the photocatalyst may be a solid photocatalyst, the photocatalyst solid is used for slurry stirring of the surface layer composition, or may be a solution photocatalyst, the photocatalyst solution is used for spraying the surface of the molded back surface layer, the photocatalyst solution is one selected from solutions prepared from titanium dioxide, zinc oxide or zirconium dioxide, and the solid content of the photocatalyst in the photocatalyst solution is 1-30% by mass.
In another embodiment, when the photocatalyst is a photocatalyst solution, the photocatalyst solution is not added in the preparation of the surface layer composition, the surface layer composition is mixed and then laid on a base layer for molding, and the photocatalyst solution is sprayed on the surface of the surface layer within 1-10000 minutes after molding.
The preparation method of the photocatalyst solution comprises the following steps: and pre-mixing the photocatalyst with water or other organic solvents, and mixing for 1-10 minutes by adopting a mode of combining stirring and ultrasonic dispersion.
The second aspect of the application provides a preparation method of carbon-fixing type multifunctional high-strength pervious concrete,
the preparation method of the base layer composition comprises the following steps: mixing cement, superfine siliceous powder and carbonized waste concrete powder to obtain a mixture; mixing the mixture, water and a polycarboxylic acid water reducing agent to obtain base layer slurry; mixing the base layer slurry, the carbonized waste concrete fine aggregate and the carbonized waste coarse aggregate to prepare the base layer composition;
the base layer composition comprises the following components in percentage by mass:
the preparation method of the surface layer composition comprises the following steps: mixing cement, superfine silica powder, carbonized waste concrete powder, a photocatalyst and a pigment to obtain a mixture; mixing the mixture, water and a polycarboxylic acid water reducing agent to obtain surface layer slurry; mixing the surface layer slurry and glass aggregate to prepare the surface layer composition;
the surface layer composition comprises the following components in percentage by mass:
specifically, the strength of the base layer slurry is greater than 120 MPa; the strength of the surface layer slurry is more than 120 MPa.
The third aspect of the application provides a multi-functional high strength pervious concrete pavement of solid carbon type, includes:
step 1, mixing the base layer composition, and then pressing and forming to obtain a base layer;
and 2, mixing the surface layer composition, paving the mixture on the base layer, pressurizing and molding the mixture, and curing the mixture to obtain the carbon-fixing type multifunctional high-strength pervious concrete pavement.
In another embodiment, the press molding may be a roll compaction molding or a vibratory compaction molding.
In another embodiment, the curing is conventional concrete curing, and the curing time is generally 28 days.
Specifically, the compressive strength of the carbon-fixing type multifunctional high-strength pervious concrete pavement is larger than 50MPa, and the water permeability coefficient is larger than 0.5 mm/s.
The carbon-fixing type multifunctional high-strength pervious concrete can be used in concrete in the fields of urban pavements, slope protection, rainwater drainage and the like.
The application provides a special component and special proportion's multi-functional high strength pervious concrete of solid carbon type, including basic unit's composition and surface course composition, these two kinds of compositions adopt bilayer structure through physics and chemical reaction, obtain high strength, the high multi-functional high strength pervious concrete of solid carbon type of characteristic that permeates water and air purification, and the surface of the concrete of this application is porous rough moreover, has higher antiskid nature, can be in building engineering wide application to obtain excellent mechanics and skid resistance. Simultaneously, the multi-functional high strength pervious concrete of solid carbon type of this application has used low water-cement ratio, and the discarded aggregate and the glass of close packing's material system and a large amount of carbonization treatments can absorb a large amount of carbon dioxide, has reduced pervious concrete's preparation cost, also makes this pervious concrete have more the feature of environmental protection. In addition, the preparation method is simple in preparation process and low in equipment requirement.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
Fig. 1 is a structural diagram and a physical diagram of a carbon-fixation multifunctional high-strength pervious concrete pavement provided in the embodiment of the application, where a is a structural schematic diagram of the carbon-fixation multifunctional high-strength pervious concrete pavement, B is an appearance diagram of the high-strength pervious concrete pavement, and C is a water permeability test diagram of the carbon-fixation multifunctional high-strength pervious concrete pavement.
Detailed Description
The application provides carbon-fixing type multifunctional high-strength pervious concrete, a preparation method thereof and a pavement, which are used for solving the technical defects of low strength and single purpose of pervious concrete in the prior art.
The technical solutions in the embodiments of the present application will be described clearly and completely below, and it should be understood that the described embodiments are only a part of the embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The raw materials and reagents used in the following examples are commercially available or self-made.
The raw materials or reagents used in the following examples are all commercially available or self-made.
Examples 1 to 5
The application provides five carbon-fixing type multifunctional high-strength pervious concrete pavements, and the concrete method comprises the following steps:
1. weighing the raw material components according to the mass percentage of the raw materials in the table 1, mixing the cement, the superfine silicon powder and the carbonized waste concrete powder, and stirring strongly for 5 minutes to obtain a mixture; mixing the mixture, water and a polycarboxylic acid water reducing agent to obtain base layer slurry; five base layer compositions, labeled as examples 1-5, were prepared by mixing and stirring the base layer slurry, the carbonized waste concrete fine aggregate, and the carbonized waste coarse aggregate for 2 minutes. Wherein, the types of the cement and the superfine siliceous powder are shown in the table 1; preparation parameters (waste material type, carbonization method, carbonization time and carbon dioxide concentration) of carbonized waste concrete powder, carbonized waste concrete fine aggregate and carbonized waste coarse aggregate are shown in table 1, and carbonization temperatures are all 30 ℃.
2. Weighing the raw material components according to the mass percentage of the raw materials in the table 2, mixing and stirring the cement, the superfine silicon powder, the carbonized waste concrete powder, the photocatalyst (namely titanium dioxide solid) and the pigment for 5 minutes to obtain a mixture; mixing the mixture, water and a polycarboxylic acid water reducing agent to obtain surface layer slurry; three facer compositions, labeled as example 1, example 3, and example 5, were prepared by mixing and stirring the facer slurry and glass aggregate for 2 minutes. Wherein, the types of cement, superfine silica powder, glass aggregate, photocatalyst and pigment are shown in the table 2; the preparation parameters (carbonization method, carbonization time and carbon dioxide concentration) of the carbonized waste concrete powder are shown in table 2, and the carbonization temperature is 30 ℃.
Weighing the raw material components according to the mass percentage of the raw materials in the table 2, and mixing and stirring the cement, the superfine silicon powder, the carbonized waste concrete powder and the pigment for 5 minutes to obtain a mixture; mixing the mixture, water and a polycarboxylic acid water reducing agent to obtain slurry; the slurry and glass aggregate were mixed and stirred for 2 minutes to produce two top layer compositions, designated example 2 and example 4, respectively. Wherein, the types of cement, superfine silica powder, glass aggregate, photocatalyst and pigment are shown in the table 2; the preparation parameters (carbonization method, carbonization time and carbon dioxide concentration) of the carbonized waste concrete powder are shown in table 2, and the carbonization temperature is 30 ℃. The amount of photocatalyst added in examples 2 and 4 of Table 2 refers to the titanium dioxide solids mass percent calculation.
3. Base layer composition according to table 3: the mass ratio of the surface layer composition is that the five base layer compositions in the step 1 are pre-pressed and formed to form five base layers; and then, correspondingly and uniformly paving the five surface layer compositions obtained in the step 2 on a base layer, tightly compacting the base layer and the surface layer which correspond to each other one by using a rolling roller method or a vibration compaction method to obtain a concrete pavement, and uniformly spraying the titanium dioxide solution in the table 2 on the surface layers obtained in the embodiment 2 and the embodiment 4 respectively for 6 hours and 72 hours after the surface layers are shaped to obtain five high-strength permeable concrete pavements. And then placing the high-strength pervious concrete pavements of the embodiments 1-5 in a standard curing box for curing for 28 days to obtain the hardened carbon-fixing type multifunctional high-strength pervious concrete pavement, and testing the performances such as compressive strength, permeability coefficient, skid resistance and the like, wherein the results are shown in table 3. Wherein, the one-to-one correspondence is in the corresponding shaping of the base layer composition of example 1 in table 1 and the surface layer composition of example 2 in table 2, namely, example 1 in table 1 and example 1 in table 2.
TABLE 1
TABLE 2
TABLE 3
As can be seen from Table 3, the compressive strength of the base layer slurry of the examples of the present application has an ultra high strength (> 120 MPa); the compressive strength of the prepared carbon-fixing type multifunctional high-strength pervious concrete pavement is more than 56MPa, and the carbon-fixing type multifunctional high-strength pervious concrete pavement has good water permeability, NO catalytic property and skid resistance.
Comparative example
The application provides a common pervious concrete pavement, and the specific method comprises the following steps:
weighing the raw material components according to the mass percentages of the raw materials in the table 4, mixing the ordinary portland cement and the superfine silica fume, and stirring strongly for 5 minutes to obtain a mixture; mixing the mixture with water to obtain slurry; mixing and stirring the slurry and waste concrete aggregate (2.36-10 mm) for 2 minutes to prepare common pervious concrete slurry, and measuring the compressive strength of the common pervious concrete slurry. The results are shown in Table 4.
And then compacting the common pervious concrete by a rolling roller method or a vibration compaction method to obtain a common pervious concrete pavement, placing the common pervious concrete pavement in a standard curing box for curing for 28 days, marking the pavement as a comparative example, and measuring the compressive strength of the common pervious concrete pavement. The results are shown in Table 4.
TABLE 4
As can be seen from table 4, the compressive strength of the ordinary pervious concrete slurry does not reach high strength because the ordinary pervious concrete does not adopt the design concept (low water-cement ratio) and the material system (close packing and carbonization treatment) of the present application, so that the overall pervious concrete pavement does not obtain high compressive strength.
The embodiment of the application provides the basic unit composition of specific proportion and specific raw materials, and the basic unit composition adopts different particle morphology and the powder of equidimension not, and under water and high-efficiency water reducing agent's mixing effect, different powder particles will be closely packed, have effectively filled the space between the solid particle for basic unit composition slurry reaches the biggest closely knit state, thereby obtains the basic unit composition slurry (> 120MPa) of superhigh strength. Because of the adoption of very low water consumption and a large amount of fine powder, the slurry presents higher viscosity, the caking property between carbonized waste aggregates is improved, simultaneously, the pores between the aggregates are not blocked, and the higher water permeability of the concrete is ensured. In addition, the carbonized waste aggregate reduces the porosity of the waste aggregate and improves the strength of the waste aggregate, thereby not only effectively capturing carbon dioxide, but also reducing the water absorption of the waste aggregate, and providing support for the hydration and the strength improvement of cement.
The embodiment of the application provides a base layer composition and a surface layer composition which are prepared from specific raw materials according to specific proportions, so that alkaline cement hydration products can be subjected to volcanic ash reaction with superfine silica powder and carbonized waste concrete powder, and the compactness and strength of slurry are improved. Because of the low water content of the slurry, a large amount of cement does not react with the water. The porous structure of the pervious concrete brings benefits to the continuous hydration of the slurry, and the unhydrated cement and the superfine siliceous powder can continuously react with water entering the interior of the concrete, so that the overall strength of the pervious concrete is improved, and the strength of the concrete is improved along with the pervious action. The surface layer composition is introduced with the photocatalytic material, so that the carbon-fixing type multifunctional high-strength pervious concrete has the effect of purifying air. Because the functional high-strength pervious concrete surface layer has a porous structure and is provided with the waste glass material, light can be reflected in the porous structure, and the photocatalysis effect is greatly enhanced.
From fig. 1A, it can be known that the carbon-fixation type multifunctional high-strength pervious concrete pavement has an air purification effect, fig. 1B shows that the carbon-fixation type multifunctional high-strength pervious concrete pavement has a double-layer material structure, and fig. 1C shows that the carbon-fixation type multifunctional high-strength pervious concrete pavement has a large number of pores, is rough in surface and skid-resistant, and also has high water permeability.
To sum up, the multi-functional high strength pervious concrete pavement of solid carbon type of this application is through designing the double-deck material structure, through physics and chemical reaction for the multi-functional high strength pervious concrete of solid carbon type of this application embodies high strength, the high characteristic of permeating water and air purification. Simultaneously, the multifunctional high-strength carbon-fixing pervious concrete uses a large amount of carbonized waste aggregate and glass, reduces the preparation cost of the pervious concrete, and also enables the pervious concrete to have more environmental protection.
The foregoing is only a preferred embodiment of the present application and it should be noted that those skilled in the art can make several improvements and modifications without departing from the principle of the present application, and these improvements and modifications should also be considered as the protection scope of the present application.
Claims (10)
1. Many functional high strength pervious concrete of solid carbon type, its characterized in that includes:
a base layer composition and a top layer composition;
the base layer composition comprises the following components in percentage by mass:
the surface layer composition comprises the following components in percentage by mass:
2. the carbon-fixing type multifunctional high-strength pervious concrete according to claim 1, characterized in that the mass percentage of the base layer composition is 10% -95% and the mass percentage of the surface layer composition is 5% -90%.
3. The carbon-fixing multifunctional high-strength pervious concrete according to claim 1, characterized in that the average particle size of the carbonized waste concrete powder is less than 100 μm; the carbonized waste concrete powder is selected from gas carbonized waste concrete powder or/and liquid carbonized waste concrete powder; the gas carbonization waste concrete powder is obtained by carbonizing waste concrete powder and carbon dioxide gas in a closed container; the liquid carbonized waste concrete powder is obtained by introducing carbon dioxide gas into a mixed liquid of water and waste concrete powder for carbonization treatment.
4. The carbon-fixing multifunctional high-strength pervious concrete according to claim 1, characterized in that the average particle size of the carbonized waste concrete fine aggregate is less than 2.36 mm; the carbonized waste concrete fine aggregate is selected from gas carbonized waste concrete fine aggregate or/and liquid carbonized waste concrete fine aggregate; the liquid carbonized waste concrete fine aggregate is obtained by carbonizing waste concrete fine aggregate and carbon dioxide gas in a closed container; the gas carbonization waste concrete fine aggregate is obtained by introducing carbon dioxide gas into a mixed solution of water and the waste concrete fine aggregate for carbonization treatment.
5. The carbon-fixing multifunctional high-strength pervious concrete as claimed in claim 1, wherein the average particle size of the carbonized waste coarse aggregate is 2.36-14 mm; the carbonized waste coarse aggregate is selected from one or more of gas carbonized crushed concrete aggregate, gas carbonized steel slag and gas carbonized incineration waste bottom ash; the gas carbonization crushed concrete aggregate is obtained by carbonizing the crushed concrete aggregate and carbon dioxide gas in a closed container; the gas carbonized steel slag is obtained by carbonizing steel slag and carbon dioxide gas in a closed container; the gas carbonization waste incineration furnace bottom ash is obtained by carbonizing waste incineration furnace bottom ash and carbon dioxide gas in a closed container.
6. The carbon-fixing multifunctional high-strength pervious concrete according to claim 1, characterized in that the average particle size of the glass aggregate is 2.36-10 mm; the glass aggregate is selected from one or more of silicate glass, borate glass and phosphate glass fine particles.
7. The carbon-fixing multifunctional high-strength pervious concrete according to claim 1, wherein said cement is selected from one or more of portland cement, aluminate cement, sulphoaluminate cement, slag/fly ash portland cement, and limestone calcined clay cement; the superfine silica powder is selected from nano silicon dioxide or/and superfine silica fume.
8. The carbon-fixing multifunctional high-strength pervious concrete according to claim 1, wherein the photocatalyst is selected from one or more of titanium dioxide, zinc oxide and zirconium dioxide; the pigment is selected from organic dyes or/and iron oxide pigments.
9. The method for preparing the carbon sequestration type multifunctional high-strength pervious concrete according to any one of claims 1 to 8, characterized in that,
the preparation method of the base layer composition comprises the following steps: mixing cement, superfine siliceous powder and carbonized waste concrete powder to obtain a mixture; mixing the mixture, water and a polycarboxylic acid water reducing agent to obtain base layer slurry; mixing the base layer slurry, the carbonized waste concrete fine aggregate and the carbonized waste coarse aggregate to prepare the base layer composition;
the base layer composition comprises the following components in percentage by mass:
the preparation method of the surface layer composition comprises the following steps: mixing cement, superfine silica powder, carbonized waste concrete powder, a photocatalyst and a pigment to obtain a mixture; mixing the mixture, water and a polycarboxylic acid water reducing agent to obtain surface layer slurry; mixing the surface layer slurry and glass aggregate to prepare the surface layer composition;
the surface layer composition comprises the following components in percentage by mass:
10. many functional high strength pervious concrete road surface of solid carbon type, its characterized in that includes:
step 1, mixing the base layer composition of any one of claims 1 to 9, and then pressing and forming to obtain a base layer;
step 2, mixing the surface layer composition of any one of claims 1 to 9, paving the mixture on the base layer, pressing, forming and curing to obtain the carbon-fixing type multifunctional high-strength pervious concrete pavement.
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