CN115504743A - Environment-friendly concrete and preparation method thereof - Google Patents
Environment-friendly concrete and preparation method thereof Download PDFInfo
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- CN115504743A CN115504743A CN202211289561.9A CN202211289561A CN115504743A CN 115504743 A CN115504743 A CN 115504743A CN 202211289561 A CN202211289561 A CN 202211289561A CN 115504743 A CN115504743 A CN 115504743A
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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
- C04B28/04—Portland cements
-
- 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
- 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
- C04B20/0076—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 characterised by the grain distribution
- C04B20/008—Micro- or nanosized fillers, e.g. micronised fillers with particle size smaller than that of the hydraulic binder
-
- 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
- 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
- C04B20/02—Treatment
- C04B20/023—Chemical treatment
-
- 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
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/346—Materials exhibiting reduced plastic shrinkage cracking
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- 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
Abstract
The application relates to the technical field of concrete, and particularly discloses environment-friendly concrete and a preparation method thereof. The environment-friendly concrete is prepared from the following raw materials in parts by weight: 100-150 parts of cement; 300-350 parts of modified recycled aggregate; 50-100 parts of fly ash; 30-60 parts of steel slag; 100-150 parts of water; the modified recycled aggregate is prepared from the following raw materials in parts by weight: 5-10 parts of unmodified recycled aggregate; 10-20 parts of glacial acetic acid; 8-15 parts of cassava starch. The application of the environment-friendly concrete can be used for concrete production, and has the advantage of improving the mechanical property of the environment-friendly concrete.
Description
Technical Field
The application relates to the technical field of concrete, in particular to environment-friendly concrete and a preparation method thereof.
Background
Ordinary concrete is usually formed by mainly mixing a cementing material, aggregate and water, the aggregate in the ordinary concrete is usually natural gravel in a riverbed, a large amount of natural gravel is exploited along with the increase of the demand of the concrete, meanwhile, along with the rapid development of modern building industry, the discharge amount of building garbage is increased year by year, and if the waste concrete is not reasonably recycled, resources can be wasted and environmental pollution can be caused.
The environment-friendly concrete is a concrete material prepared by using construction industry wastes, aggregate prepared by using the waste concrete is called recycled aggregate, and natural aggregate is used as the recycled aggregate, so that the environment-friendly concrete has good social benefits of energy conservation and environmental protection.
However, the recycled aggregate in the environment-friendly concrete has the defects of more cracks, high water absorption and low compressive strength, so that the environment-friendly concrete has the defects of easy cracking and poor compressive strength, and the mechanical property of the environment-friendly concrete is poor.
Disclosure of Invention
In order to improve the mechanical property of the environment-friendly concrete, the application provides the environment-friendly concrete and a preparation method thereof.
In a first aspect, the present application provides an environment-friendly concrete, which adopts the following technical scheme:
the environment-friendly concrete is prepared from the following raw materials in parts by weight:
100-150 parts of cement;
300-350 parts of modified recycled aggregate;
50-100 parts of fly ash;
30-60 parts of steel slag;
100-150 parts of water;
the modified recycled aggregate is prepared from the following raw materials in parts by weight:
5-10 parts of unmodified recycled aggregate;
10-20 parts of glacial acetic acid;
8-15 parts of cassava starch.
By adopting the technical scheme, the recycled aggregate is obtained by crushing and screening waste concrete, the steel slag is steel slag discharged by a steel mill, and the recycled aggregate and the steel slag are added in the process of preparing the concrete, so that the resource is recycled, but the recycled aggregate is modified by glacial acetic acid and tapioca starch due to a large number of micro-cracks in the recycled aggregate, the glacial acetic acid enables the surface of the alkaline recycled aggregate to be acidic, and the condition that the concrete cracks due to the generation of alkaline aggregate reaction is reduced; and due to the addition of the cassava starch, the cassava starch and the glacial acetic acid can be associated through hydrogen bonds, so that the cassava starch can automatically enter the microcracks of the recycled aggregate and form crystalline complexes in the microcracks, the effect of filling the microcracks of the recycled aggregate is achieved, a large amount of hydration heat is generated in the cement hydration reaction process, the cassava starch in the microcracks of the recycled aggregate is gelatinized and gradually converted into viscous colloid along with the rise of temperature, the molding of concrete is facilitated, the initial setting time is shortened, the shrinkage cracks caused by aggregate settlement are reduced, and the concrete cracking is reduced.
In addition, glacial acetic acid is a polar organic compound, has strong volatility, can be quickly volatilized in the hydration reaction process of cement, realizes quick diffusion of heat, and reduces the cracking of concrete.
Preferably, the preparation method of the modified aggregate comprises the following steps:
firstly, crushing and screening unmodified recycled aggregate, then soaking in glacial acetic acid for 15-20min, and then adding cassava starch for ultrasonic dispersion to obtain the modified recycled aggregate.
By adopting the technical scheme, the recycled aggregate is firstly soaked in the glacial acetic acid, the glacial acetic acid plays a role in cleaning the residual cement stone on the surface of the recycled aggregate, the specific surface area of the recycled aggregate is increased, the cassava starch is added, and the cassava starch is bonded in the microcracks of the recycled aggregate in an association mode with the glacial acetic acid, so that the improvement of the bonding strength between the cassava starch and the recycled aggregate is facilitated.
Preferably, the modified recycled aggregate further comprises 8-15 parts of ceramic micropowder.
By adopting the technical scheme, the ceramic micro powder has lower viscosity, so that the ceramic micro powder has better fluidity, and in the process of association of the cassava starch and the glacial acetic acid, the ceramic micro powder flows towards the microcracks of the recycled aggregate along with the cassava starch and is filled in the microcracks of the recycled aggregate, and when the cassava starch is influenced by the temperature of hydration heat, the viscosity of the cassava starch rises and the ceramic micro powder is bonded in the microcracks of the recycled aggregate, so that the strength of the recycled aggregate is enhanced, and the compressive strength of the environment-friendly concrete is further enhanced.
Preferably, the particle size of the ceramic micro powder is 50-80nm.
By adopting the technical scheme, the value of the grain diameter of the ceramic micro powder is within the range of 50-80nm, the ceramic micro powder can be better filled in the recycled aggregate, and the strength of the recycled aggregate is improved.
Preferably, the paint also comprises 26-35 parts of a crosslinking solution, wherein the crosslinking solution comprises 11-15 parts of toluene diisocyanate and 15-20 parts of castor oil.
By adopting the technical scheme, the toluene diisocyanate and the castor oil can be crosslinked to generate the polyurethane prepolymer, when the polyurethane prepolymer is blended with the modified recycled aggregate, the crosslinking solution can play a role in modifying the cassava starch, the defect of strong hydrophilicity of the cassava starch is overcome, the mechanical strength of the cassava starch is improved, the mechanical property of the recycled aggregate is further improved, meanwhile, the condition that the concrete cracks due to aggregate settlement can be reduced in the crosslinking process of the crosslinking solution, and the ceramic micropowder is fixed in the recycled aggregate, so that the compressive strength and the cracking resistance of the environment-friendly concrete are improved.
Preferably, the preparation method of the crosslinking solution comprises the following steps: firstly, castor oil is dried in vacuum to remove moisture, then toluene diisocyanate is added, and the mixture is stirred for 1 hour at the temperature of 80-90 ℃ to obtain a crosslinking solution.
By adopting the technical scheme, the castor oil is dehydrated after being dried, the adverse effect of moisture contained in the crosslinking solution on the cassava starch is reduced, the cassava starch can be modified by the crosslinking solution under the influence of the hydration heat temperature, the hydrophobicity of the cassava starch is improved, the water absorption of the recycled aggregate is reduced, and the mechanical property of the recycled aggregate is improved.
In a second aspect, the present application provides a method for preparing an environment-friendly concrete, which adopts the following technical scheme:
the preparation method of the environment-friendly concrete comprises the following steps:
and fully mixing the modified recycled aggregate, cement, fly ash, steel slag and water, and curing to obtain the environment-friendly concrete.
By adopting the technical scheme, after the modified recycled aggregate is mixed with cement, fly ash, steel slag and water, the prepared environment-friendly concrete has good anti-cracking performance and compressive strength, is beneficial to recycling of wastes and is more environment-friendly.
Preferably, the preparation method of the environment-friendly concrete comprises the following steps:
the modified recycled aggregate and the crosslinking solution are quickly stirred and mixed, then the cement, the fly ash, the steel slag and the water are added for stirring, and the environment-friendly concrete is obtained after maintenance and curing.
By adopting the technical scheme, the cross-linking solution is firstly mixed with the modified recycled aggregate and then mixed with other raw materials, and in the cement hydration reaction process, the generated heat is beneficial to modifying the cassava starch in the modified recycled aggregate, and simultaneously, the ceramic micro powder is fixed in the recycled aggregate, so that the compressive strength of the ceramic micro powder is improved; the crosslinking solution is influenced by hydration heat to generate crosslinking, which is beneficial to the rapid molding of concrete and reduces the cracking of the concrete.
In summary, the present application has the following beneficial effects:
1. because the modified recycled aggregate and the ceramic micro powder are adopted, the glacial acetic acid in the modified raw materials reduces the generation of alkali aggregate reaction, so that the concrete is cracked; the cassava starch in the modified raw materials is beneficial to the forming of concrete, and the initial setting time is shortened, so that shrinkage cracks caused by aggregate settlement are reduced, concrete cracking is reduced, and the mechanical property of the recycled aggregate filled with the ceramic micro powder is improved.
2. In the application, a cross-linking solution is preferably adopted, so that the defect of strong hydrophilicity of the cassava starch is overcome, the mechanical strength of the cassava starch is improved, and the mechanical property of the recycled aggregate is further improved; in the crosslinking process of the crosslinking solution, the cracking of the concrete caused by aggregate settlement can be reduced, and meanwhile, the ceramic micropowder is fixed in the recycled aggregate, so that the compressive strength and the cracking resistance of the environment-friendly concrete are improved.
3. According to the method, after the modified recycled aggregate is mixed with cement, fly ash, steel slag and water, the prepared environment-friendly concrete has good anti-cracking performance and compressive strength, is beneficial to recycling of waste, and is more environment-friendly.
Detailed Description
The present application will be described in further detail with reference to specific examples.
The raw materials in the application are all commercial products;
wherein the molecular weight of the toluene diisocyanate is 174.16;
the castor oil is a product sold in Shanghai Fangye chemical Co., ltd, and the CAS number is 8001-79-4;
the cassava starch is a product sold in the market of Shanghai-sourced leaf biotechnology limited company with the product number of S25805-500g;
the cement is portland cement with a strength grade of 42.5.
Examples
Example 1
The environment-friendly concrete is prepared from the following raw materials in parts by weight:
120kg of cement;
320kg of modified recycled aggregate; average particle size 2 cm;
80kg of fly ash;
45kg of steel slag; average particle size 0.8 cm;
125kg of water;
the preparation method comprises the following steps:
and fully mixing the cement, the modified recycled aggregate, the fly ash, the steel slag and the water, curing for 28 days, and curing to obtain the environment-friendly concrete.
The preparation method of the modified recycled aggregate comprises the following steps: 8kg of unmodified recycled aggregate is crushed, screened and soaked in 15kg of glacial acetic acid, 10kg of cassava starch is added and uniformly mixed, and the modified recycled aggregate is obtained.
Examples 2 to 3
An environment-friendly concrete is based on the concrete of example 1, and is different in raw material dosage.
The amounts of the eco-friendly concrete raw materials of examples 1 to 3 are shown in the following table.
TABLE 2 raw material amounts of eco-friendly concrete of examples 1 to 3
Example 4
The environment-friendly concrete is based on the embodiment 1, and is characterized in that 10kg of ceramic micro powder is further added into the modified recycled aggregate, and the particle size of the ceramic micro powder is 70nm.
Example 5
The environment-friendly concrete is characterized in that 8kg of ceramic micro powder is further added into the modified recycled aggregate based on the embodiment 4, and the particle size of the ceramic micro powder is 70nm.
Example 6
The environment-friendly concrete is characterized in that 15kg of ceramic micro powder is added into the modified recycled aggregate on the basis of the embodiment 4, and the particle size of the ceramic micro powder is 70nm.
Example 7
An environmentally friendly concrete, which is different from that of example 4 in that the ceramic fine powder has a particle size of 40nm.
Example 8
An environmentally friendly concrete, which is different from that of example 4 in that the ceramic fine powder has a particle size of 80nm.
Example 9
An environmentally friendly concrete, which is based on example 4, is distinguished in that the ceramic fine powder has a particle size of 20nm.
Example 10
An environmentally friendly concrete, which is based on example 4, is distinguished in that the ceramic fine powder has a particle size of 100nm.
Example 11
Based on example 4, the environment-friendly concrete is characterized in that the raw materials further comprise 30kg of cross-linking solution, and the cross-linking solution comprises 12kg of toluene diisocyanate and 18kg of castor oil;
the preparation method of the crosslinking solution comprises the following steps:
firstly, castor oil is dried in vacuum to remove water, then toluene diisocyanate is added, and the mixture is stirred for 1 hour at the temperature of 80 ℃ to obtain a cross-linking solution;
the preparation method of the environment-friendly concrete comprises the following steps:
the modified recycled aggregate and the crosslinking solution are quickly stirred and mixed, then the cement, the fly ash, the steel slag and the water are added for stirring, the curing is carried out for 28 days, and the environment-friendly concrete is obtained after the curing.
Examples 12 to 13
An environmentally friendly concrete which is based on example 9 and differs therefrom in the amount of the crosslinking solution used in the raw materials.
The amounts of crosslinking solution used for examples 11-13 are given in the table below.
TABLE 3 crosslinking solution dosage for examples 11-13
Comparative example
Comparative example 1
An environmentally friendly concrete, which is different from example 1 in that the amount of glacial acetic acid used in the modified recycled aggregate was 0kg.
Comparative example 2
An environment-friendly concrete, which is different from the concrete in example 1 in that the dosage of the cassava starch in the modified recycled aggregate is 0kg.
Comparative example 3
An environmentally friendly concrete, which differs from example 1 in that the modified recycled aggregate is replaced with an equal amount of unmodified recycled aggregate.
Comparative example 4
An eco-friendly concrete, which is different from example 1 in that glacial acetic acid is replaced with an equal amount of n-butyric acid.
Comparative example 5
The environment-friendly concrete is different from the environment-friendly concrete in example 4 in that the ceramic fine powder is replaced by the same amount of quartz powder.
Comparative example 6
The preparation method of the environment-friendly concrete is different from the embodiment 11 in that the environment-friendly concrete is obtained by directly mixing the cross-linking solution with cement, modified recycled aggregate, fly ash, steel slag and water, and curing for 28 days.
Performance test
The test comprises the following steps:
1. the compression strength of the environment-friendly concrete after 28 days of curing is tested according to the method specified in GB/T50081-2002 concrete mechanical property test method Standard.
2. And calculating the cracking area of the concrete in unit area, wherein the smaller the cracking area in unit area is, the better the cracking resistance is.
The eco-friendly concretes of examples 1 to 11 and comparative examples 1 to 6 were tested according to the above-described method, and the test results are shown in the following table.
TABLE 4 test results of examples 1 to 11 and comparative examples 1 to 6
As can be seen by combining examples 1-3 with Table 4, example 1 is superior to examples 2-3, indicating that example 1 is a preferred example.
As can be seen by combining the example 1 and the comparative examples 1-5 and combining the table 4, the example 1 is superior to the comparative examples 1-5, and the condition that the concrete cracks due to the fact that the glacial acetic acid makes the surface of the alkaline recycled aggregate acidic after the recycled aggregate is modified by the glacial acetic acid and the tapioca starch in the application is reduced; in addition, due to the addition of the cassava starch, the cassava starch and the glacial acetic acid can be associated through hydrogen bonds, so that the cassava starch can automatically enter the microcracks of the recycled aggregate and form crystalline complexes in the microcracks, the effect of filling the microcracks of the recycled aggregate is achieved, a large amount of hydration heat is generated in the cement hydration reaction process, the cassava starch in the microcracks of the recycled aggregate is gelatinized and gradually converted into viscous colloid along with the rise of temperature, the molding of concrete is facilitated, the initial setting time is shortened, the shrinkage cracks caused by aggregate settlement are reduced, and the concrete cracking is reduced; in addition, glacial acetic acid is a polar organic compound, has strong volatility, can be quickly volatilized in the hydration reaction process of cement, realizes quick diffusion of heat, and reduces the cracking of concrete.
It can be seen by combining the examples 1 and 4-6 and combining the table 4 that the examples 4-6 are all better than the example 1 and the example 4 is better than the examples 5-6, which illustrates that the example 4 is a better example, the ceramic micro powder has lower viscosity, so that the ceramic micro powder has better fluidity, the ceramic micro powder flows towards the microcracks of the recycled aggregate along with the cassava starch in the process of associating the cassava starch with the glacial acetic acid and is filled in the microcracks of the recycled aggregate, and when the cassava starch is influenced by the temperature of hydration heat, the viscosity of the cassava starch is increased and the ceramic micro powder is bonded in the microcracks of the recycled aggregate, so that the strength of the recycled aggregate is enhanced, and further the compressive strength of the environment-friendly concrete is enhanced.
It can be seen by combining examples 4 and 7-10 with table 4 that example 4 is better than examples 7-8 and better than examples 9-10, and that the value of the particle size of the ceramic fine powder is in the range of 40-80nm, which can better fill in the recycled aggregate and improve the strength of the recycled aggregate.
As can be seen by combining the examples 4 and 11 to 13 and combining the table 4, the examples 11 to 13 are superior to the example 4, which indicates that the toluene diisocyanate and the castor oil can be crosslinked to generate the polyurethane prepolymer in the application, when the polyurethane prepolymer is blended with the modified recycled aggregate, the crosslinking solution can modify the tapioca starch, improve the defect of strong hydrophilicity of the tapioca starch, improve the mechanical strength of the tapioca starch, further increase the mechanical property of the recycled aggregate, reduce the cracking of the concrete caused by the sedimentation of the aggregate in the crosslinking process of the crosslinking solution, and improve the compressive strength and the cracking resistance of the environment-friendly concrete because the ceramic micropowder is fixed in the recycled aggregate; the castor oil is dehydrated after being dried, so that adverse effects of moisture contained in the crosslinking solution on the cassava starch are reduced, the cassava starch can be modified by the crosslinking solution under the influence of the hydration heat temperature, the hydrophobicity of the cassava starch is improved, the water absorption of the recycled aggregate is reduced, and the mechanical property of the recycled aggregate is improved.
As can be seen by combining example 9 and comparative example 6 and table 4, example 9 is superior to comparative example 6 in that the crosslinking solution is firstly mixed with the modified recycled aggregate and then mixed with other raw materials in the application, and the generated heat is favorable for modifying tapioca starch in the modified recycled aggregate in the cement hydration reaction process, so that the ceramic micropowder is fixed in the recycled aggregate, and the compressive strength of the modified recycled aggregate is improved; the crosslinking solution is influenced by hydration heat to generate crosslinking, which is beneficial to the rapid molding of concrete and reduces the cracking of the concrete.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (8)
1. The environment-friendly concrete is characterized by comprising the following raw materials in parts by weight:
100-150 parts of cement;
300-350 parts of modified recycled aggregate;
50-100 parts of fly ash;
30-60 parts of steel slag;
100-150 parts of water;
the modified recycled aggregate is prepared from the following raw materials in parts by weight:
5-10 parts of unmodified recycled aggregate;
10-20 parts of glacial acetic acid;
8-15 parts of cassava starch.
2. The environment-friendly concrete according to claim 1, wherein: the preparation method of the modified aggregate comprises the following steps:
firstly, crushing and screening unmodified recycled aggregate, then soaking in glacial acetic acid for 15-20min, and then adding cassava starch for ultrasonic dispersion to obtain the modified recycled aggregate.
3. The environment-friendly concrete as claimed in claim 1, wherein: the modified recycled aggregate also comprises 8-15 parts of ceramic micro powder.
4. The environment-friendly concrete according to claim 1, wherein: the grain size of the ceramic micro powder is 50-80nm.
5. The environment-friendly concrete according to claim 1, wherein: the modified castor oil composition further comprises 26-35 parts of a crosslinking solution, wherein the crosslinking solution comprises 11-15 parts of toluene diisocyanate and 15-20 parts of castor oil.
6. The environment-friendly concrete according to claim 5, wherein: the preparation method of the crosslinking solution comprises the following steps: firstly, castor oil is dried in vacuum to remove water, then toluene diisocyanate is added, and the mixture is stirred for 1 hour at the temperature of 80-90 ℃ to obtain a cross-linking solution.
7. The method for preparing the environment-friendly concrete as claimed in any one of claims 1 to 4, characterized by comprising the following steps:
and fully mixing the modified recycled aggregate, the cement, the fly ash, the steel slag and the water, and curing to obtain the environment-friendly concrete.
8. The preparation method of the environment-friendly concrete as claimed in any one of claims 5 to 6, characterized by comprising the following steps:
the modified recycled aggregate and the crosslinking solution are quickly stirred and mixed, then the cement, the fly ash, the steel slag and the water are added for stirring, and the environment-friendly concrete is obtained after maintenance and curing.
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| CN111039624A (en) * | 2019-12-25 | 2020-04-21 | 泸州临港思源混凝土有限公司 | Recycled concrete and preparation method thereof |
| CN113443879A (en) * | 2021-07-24 | 2021-09-28 | 陕西秦汉恒盛新型建材科技股份有限公司 | Lightweight aggregate concrete produced by utilizing recycled lightweight aggregate and production process thereof |
| CN115180881A (en) * | 2022-05-24 | 2022-10-14 | 上海楼诚混凝土有限公司 | Environment-friendly high-strength concrete and preparation method thereof |
| CN115073074A (en) * | 2022-08-24 | 2022-09-20 | 平泉市岩石建筑材料有限公司 | Environment-friendly solid waste recycled concrete and preparation method thereof |
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