Composition for inhibiting the alkali-silica reaction of concrete and method for producing concrete

Abstract

The application relates to the technical field of concrete materials and durability engineering, in particular to a composition for inhibiting the alkali-silica reaction of concrete and a method for preparing concrete. The composition comprises: a portland cement and a doping component selected from one or more of ceramic polishing residues, rice husk ash, metakaolin, rubber powder, silica fume, fly ash, polypropylene fiber, and the content of the doping component is 0.1%-25% based on the total mass of the composition. The composition can balance the inhibiting effect on the alkali-silica reaction of concrete and the mechanical properties.

Description

Technical Field

[0001] This application relates to the field of concrete materials and durability engineering technology, specifically to an application method for inhibiting the alkali-silica reaction (ASR) in concrete by adding mineral admixtures, and more specifically to a composition for inhibiting the alkali-silica reaction in concrete and a method for preparing concrete. Background Technology

[0002] During service, ordinary silicate cement concrete is prone to alkali-silica reaction when active siliceous aggregates are present in the system and the alkali content in the pore solution is high. This reaction produces a hydrophilic gel, which expands in volume after absorbing water, leading to concrete expansion, cracking, and a significant reduction in structural durability. In severe cases, it can affect the safety and service life of the engineering structure. Existing engineering practices often suppress the alkali-silica reaction by limiting the alkali content of cement, selecting inactive aggregates, or adding mineral admixtures.

[0003] However, current compositions of mineral admixtures still have the following shortcomings: The dosage of single mineral admixtures lacks precise control, resulting in limited inhibitory effects at low dosages, while excessively high dosages can lead to a significant decrease in the compressive strength of concrete; in complex service environments such as high salt and high alkali, the inhibitory effect of some admixtures on the later stages of the alkali-silica reaction is unstable; and when different mineral admixtures are used in combination, their reasonable dosage ratios and applicable engineering ranges lack systematic summarization, leading to a certain degree of blindness in engineering applications.

[0004] Therefore, it is necessary to propose a mineral admixture formulation scheme that, while ensuring the mechanical properties of concrete, also takes into account the inhibitory effect of alkali-silica reaction and engineering applicability. Summary of the Invention

[0005] In view of the above problems, this application provides a composition for inhibiting the alkali-silica reaction in concrete and a method for preparing concrete. This composition achieves both the inhibition of the alkali-silica reaction and the preservation of mechanical properties in concrete.

[0006] In one aspect of this application, a composition for inhibiting the alkali-silica reaction in concrete is provided. The composition comprises silicate cement and a dopant component selected from one or more of ceramic polishing slag, rice husk ash, metakaolin, rubber powder, silica fume, fly ash, and polypropylene fiber, wherein the dopant component comprises 0.1%-25% by weight of the total composition.

[0007] The above composition, when used to prepare concrete, has the advantages of effectively reducing the expansion caused by the alkali-silica reaction of concrete, inhibiting ASR expansion, ensuring its mechanical properties within the allowable range of engineering, and being suitable for engineering projects in general environments and high-salt and high-alkali environments.

[0008] According to an embodiment of this application, the doping component is the ceramic polishing slag, and the content of the ceramic polishing slag is 17% to 23% based on the total mass of the composition.

[0009] According to an embodiment of this application, the doping component is rice husk ash, and the content of rice husk ash is 7% to 11% based on the total mass of the composition.

[0010] According to an embodiment of this application, the doping component is metakaolin, and the content of metakaolin is 9% to 20% based on the total mass of the composition.

[0011] The composition according to claim 1, wherein the doping component is the rubber powder, and the content of the rubber powder is 2.5% based on the total mass of the composition.

[0012] The composition according to claim 1, wherein the doping component is the silica fume, and the silica fume content is 5-10% based on the total mass of the composition.

[0013] The composition according to claim 1, wherein the doping component is the fly ash, and the content of the fly ash is 10% based on the total mass of the composition.

[0014] The composition according to claim 1, wherein the doping component is the polypropylene fiber, and the content of the polypropylene fiber is 0.1%-0.2% based on the total mass of the composition.

[0015] According to an embodiment of this application, the doping component is selected from two of the following: ceramic polishing slag, rice husk ash, metakaolin, rubber powder, silica fume, fly ash, and polypropylene fiber. When the doping component includes the rubber powder, the total content of the doping component is 0.1%-15% based on the total mass of the composition; when the doping component includes the rice husk ash, the total content of the doping component is 5%-10% based on the total mass of the composition.

[0016] According to embodiments of this application, the method satisfies at least one of the following conditions: the particle size of the ceramic polishing slag is not greater than 0.16 mm, and the specific surface area is 300-350 m² / kg; the median particle size of the rice husk ash is 2-3 μm; the fineness of the metakaolin is 1200-1600 mesh; the particle size of the rubber powder is 80-120 mesh; the fineness of the silica fume is not less than 1600 mesh; and the density of the polypropylene fiber is 0.8-1.2 kg / m³. 3 The length is 9-12mm; the density of the fly ash is 2-3kg / cm³. 3 The silicate cement includes PO-42.5 silicate cement.

[0017] According to an embodiment of this application, the doping component includes rice husk ash, metakaolin or fly ash, wherein the content of rice husk ash is 6%-12%, the content of metakaolin is 5%-8% of the sum of the content of rice husk ash and silicate cement, or the content of fly ash is 8%-10%.

[0018] According to an embodiment of this application, the doping component includes ceramic polishing slag and silica fume, wherein the content of ceramic polishing slag is 15-20% and the content of silica fume is 5-8% based on the total mass of the composition.

[0019] According to embodiments of this application, the doping component includes the rubber powder, and one selected from silica fume, polypropylene fiber, and metakaolin, wherein the content of the rubber powder is 2%-3% based on the total mass of the composition.

[0020] The content of silica fume is 9%-13%, the content of polypropylene fiber is 0.1%-0.2%, or the content of metakaolin is 9%-13%.

[0021] In another aspect of this application, a method for preparing concrete using the aforementioned composition is provided. The method includes mixing the composition with water to achieve a water-cement ratio of 0.4-0.5. Concrete prepared by this method has the advantage of simultaneously inhibiting the alkali-silica reaction and maintaining good mechanical properties. Detailed Implementation

[0022] The embodiments of this application are described in detail below with appropriate reference to examples. However, unnecessary details may be omitted. For example, detailed descriptions of well-known matters and repetitive descriptions of actually identical structures may be omitted. This is to avoid making the following description unnecessarily lengthy and to facilitate understanding by those skilled in the art. Furthermore, the following description is provided to enable those skilled in the art to fully understand this application and is not intended to limit the subject matter of the claims.

[0023] The "range" disclosed in this application is defined by a lower limit and an upper limit. A given range is defined by selecting a lower limit and an upper limit, which define the boundaries of the particular range. Ranges defined in this way can include or exclude endpoints and can be arbitrarily combined; that is, any lower limit can be combined with any upper limit to form a range. For example, if ranges of 60 to 120 and 80 to 110 are listed for a specific parameter, it is also expected that ranges of 60 to 110 and 80 to 120 are also included. Furthermore, if minimum range values ​​of 1 and 2 are listed, and if maximum range values ​​of 3, 4, and 5 are listed, then the following ranges are all expected: 1 to 3, 1 to 4, 1 to 5, 2 to 3, 2 to 4, and 2 to 5. In this application, unless otherwise stated, the numerical range "a to b" represents a shortened representation of any combination of real numbers between a and b, where a and b are real numbers. For example, the numerical range "0 to 5" means that all real numbers between "0 and 5" have been listed in this article; "0 to 5" is just a shortened representation of these numerical combinations. In addition, when a parameter is stated as an integer ≥ 2, it is equivalent to disclosing that the parameter is, for example, an integer 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, etc.

[0024] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0025] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0026] Unless otherwise specified, all steps of this application may be performed sequentially or randomly, preferably sequentially. For example, if the method includes steps (a) and (b), it means that the method may include steps (a) and (b) performed sequentially, or it may include steps (b) and (a) performed sequentially. For example, if the method may also include step (c), it means that step (c) may be added to the method in any order. For example, the method may include steps (a), (b), and (c), or it may include steps (a), (c), and (b), or it may include steps (c), (a), and (b), etc.

[0027] In one aspect of this application, a composition for inhibiting the alkali-silica reaction in concrete is provided. The composition comprises silicate cement and a dopant component selected from one or more of ceramic polishing slag, rice husk ash, metakaolin, rubber powder, silica fume, fly ash, and polypropylene fiber, wherein the dopant component comprises 0.1%-25% by weight of the total composition.

[0028] The above composition, when used to prepare concrete, has the advantages of effectively reducing the expansion caused by the alkali-silica reaction of concrete, inhibiting ASR expansion, ensuring its mechanical properties within the allowable range of engineering, and being suitable for engineering projects in general environments and high-salt and high-alkali environments.

[0029] Specifically, aluminosilicate materials such as rice husk ash, ceramic polishing slag, silica fume, and metakaolin, due to their high pozzolanic reactivity and fineness, can be incorporated into the composition as dopants to reduce the expansion caused by the alkali-silica reaction in concrete. By controlling the content of these dopants, the defects of poor expansion inhibition or decreased mechanical properties of concrete caused by inappropriate content can be overcome. Furthermore, concrete prepared with this composition can exhibit a relatively stable late-stage inhibition effect against the alkali-silica reaction under complex service environments such as high salt and high alkali conditions.

[0030] According to an embodiment of this application, the dopant component is the ceramic polishing slag, and the content of the ceramic polishing slag is 17% to 23% based on the total mass of the composition. When ceramic polishing slag is used as the dopant component, the inhibition effect increases with the increase of the dosage, and the inhibition effect is significantly improved in the later stages as hydration continues. However, if the dosage of ceramic polishing slag is too high, it will affect the mechanical strength. Therefore, controlling the dosage to no more than 23% can better maintain the mechanical properties of the obtained concrete. For example, in the composition, the content of ceramic polishing slag can be 17%, 19%, 20%, 22%, or 23%, or selected from integers or non-integers within the above range.

[0031] In some embodiments, the performance of the composition can be further improved by controlling the properties of the ceramic polishing slag: the particle size of the ceramic polishing slag can be no greater than 0.16 mm, and the specific surface area can be 300-350 m² / kg. For example, the particle size of the ceramic polishing slag can be 0.05 mm, 0.08 mm, 0.1 mm, 0.12 mm, 0.15 mm, or 0.16 mm. Here, the particle size can be the average particle size, such as Dv50. The specific surface area of ​​the ceramic polishing slag can be 300-350 m² / kg. For example, it can be 300 m² / kg, 310 m² / kg, 315 m² / kg, 320 m² / kg, 325 m² / kg, 330 m² / kg, 335 m² / kg, 340 m² / kg, 345 m² / kg, 350 m² / kg, etc. This is beneficial for further improving the composition's ability to both suppress expansion and maintain mechanical properties.

[0032] According to embodiments of this application, the dopant component is the rice husk ash. The content of the rice husk ash, based on the total mass of the composition, is 7% to 11%. For example, the content of rice husk ash can be 7%, 8%, 9%, 10%, or 11%, or selected from integers or non-integers within the above range. Rice husk ash is rich in amorphous silica (SiO2) (typically >85%), which can undergo a secondary reaction with calcium hydroxide (Ca(OH)2), a cement hydration product, to generate more CSH gel, improving density and later-stage strength, and offering advantages in energy saving and environmental protection. However, excessively high rice husk ash content may lead to increased material moisture content, poor workability, and a greater risk of drying shrinkage and cracking in later stages. Insufficient content may result in an insignificant "volcanic ash" effect, thus limiting the improvement in strength and durability.

[0033] In some embodiments, the performance of the composition can be further improved by adjusting the properties of the rice husk ash: the median particle size of the rice husk ash can be 2-3 μm. For example, it can be 2 μm, 2.1 μm, 2.2 μm, 2.3 μm, 2.4 μm, 2.5 μm, 2.6 μm, 2.7 μm, 2.8 μm, 2.9 μm, or 3.0 μm. Rice husk ash with an appropriate particle size can better exert its interfacial effect and improve its performance in inhibiting ASR reactions.

[0034] According to embodiments of this application, the dopant component is the metakaolin. The content of the metakaolin, based on the total mass of the composition, is 9% to 20%. For example, the content of the metakaolin can be 9%, 12%, 14%, 16%, 18%, 19%, 20%, or any integer or non-integer selected from the above range.

[0035] Similarly, in some embodiments, the performance of the composition can be further improved by controlling the properties of metakaolin: the fineness of the metakaolin is 1200-1500 mesh, for example, 1200 mesh, 1300 mesh, 1350 mesh, 1480 mesh, or 1500 mesh, or an integer or non-integer selected from the above range. Appropriate fineness of metakaolin can enhance the pozzolanic reactivity of the dopant components and improve the micro-filling effect: finer filler particles have a larger contact area with cement hydration products such as Ca(OH)2, resulting in a faster and more complete pozzolanic reaction rate, thus allowing for earlier formation of CSH and calcium aluminosilicate gel, improving later strength and density. However, excessive fineness may lead to reduced effective mixing water, insufficient local hydration, agglomeration, and uneven pozzolanic reaction. Therefore, controlling the fineness of the metakaolin within the above range can further improve the performance of the composition.

[0036] Similarly, the particle size of rubber powder is 80-120 mesh, for example, 80 mesh, 90 mesh, 100 mesh, 110 mesh, or 120 mesh. The fineness of silica fume can be no less than 1600 mesh, for example, 1000 mesh, 1100 mesh, 1200 mesh, 1300 mesh, 1400 mesh, 1500 mesh, or 1600 mesh. The density of polypropylene fibers can be 0.8-1.2 kg / m³. 3 For example, it can be 0.8 kg / m 3 0.9kg / m 3 1 kg / m 3 1.1 kg / m 3 Or 1.2 kg / m 3 The length of the polypropylene fibers can be 9-12 mm, for example, 9 mm, 10 mm, 11 mm, or 12 mm. The density of fly ash can be 2-3 kg / cm³. 3 For example, it can be 2kg / cm 3 2.2kg / cm 3 2.5kg / cm 3 2.6 kg / cm 3 2.7 kg / cm 3 2.8 kg / cm 3 2.9 kg / cm 3 3.0 kg / cm 3 wait.

[0037] In this application, the silicate cement may be selected from commonly used cement types, such as PO-42.5 silicate cement.

[0038] According to embodiments of this application, the doping component can be a composite dopant. For example, the doping component can be selected from rice husk ash and fly ash, or metasilica, or rubber powder and silica fume, polypropylene fiber, or metasilica.

[0039] According to embodiments of this application, the doping component may include rice husk ash, and either the metakaolin or the fly ash. The rice husk ash content is 6%-12%, for example, 6%, 8%, 10%, 11%, or 12%. The metakaolin content is 5%-8%, for example, 5%, 6%, 7%, or 8%, or the fly ash content is 8%-10%, for example, 8%, 9%, or 10%.

[0040] According to an embodiment of this application, the doping component includes ceramic polishing slag and silica fume, wherein the content of ceramic polishing slag is 15-20% and the content of silica fume is 5-8% based on the total mass of the composition.

[0041] According to an embodiment of this application, the doping component includes the rubber powder, and one selected from silica fume, polypropylene fiber and metakaolin, wherein, based on the total mass of the composition, the content of the rubber powder is 2%-3%, the content of the silica fume is 9%-13%, the content of the polypropylene fiber is 0.1%-0.2%, or the content of the metakaolin is 9%-13%.

[0042] In another aspect of this application, a method for preparing concrete using the aforementioned composition is provided. The method includes mixing the composition with water to achieve a water-cement ratio of 0.4-0.5. Concrete prepared by this method has the advantage of simultaneously inhibiting the alkali-silica reaction and maintaining good mechanical properties.

[0043] Example The following embodiments describe the contents disclosed in this application in more detail. These embodiments are merely illustrative, as various modifications and variations will be apparent to those skilled in the art within the scope of the disclosure of the embodiments of this application. Unless otherwise stated, all parts, percentages, and ratios reported in the following embodiments are based on mass, and all reagents used in the embodiments are commercially available or synthesized by conventional methods and can be used directly without further processing, and the instruments used in the embodiments are commercially available.

[0044] Example 1 The composition contains 18% ceramic polishing slag and 82% PO-42.5 silicate cement by mass.

[0045] The ceramic polishing slag has a particle size of 0.15 mm and a specific surface area of ​​322.3 m². 2 / kg.

[0046] Example 2 The composition contains 8% rice husk ash by mass, 92% PO-42.5 silicate cement by mass, and the median particle size of rice husk ash is 2.629 μm.

[0047] Example 3 The composition contains 11% rice husk ash by mass, 89% PO-42.5 silicate cement by mass, and the median particle size of rice husk ash is 2.629 μm.

[0048] Expansion tests were conducted on the concrete mortar bars and concrete prisms prepared from the compositions of Examples 2 and 3. An 11% rice husk ash content showed an inhibitory effect on ASR expansion of the concrete. At 364 days of the experiment, the mortar bars with the 11% admixture showed an expansion inhibition rate of 57% compared to the baseline group (without any admixture) under standard ASR curing conditions. The expansion rate of the concrete prisms under standard curing conditions was only 0.04% at 364 days. The concrete prepared from the composition of Example 2 showed a lower expansion inhibition rate than that from Example 3, but its compressive strength was improved, with the 8% admixture showing the best compressive strength.

[0049] Example 4 The mass fraction of metakaolin is 20%, and the fineness of metakaolin is 1500 m² / kg; the mass fraction of PO-42.5 silicate cement is 80%.

[0050] The concrete prepared from the composition of Example 4 was tested. At 63 days, the expansion rate of the concrete mortar bars in the 20% admixture group under ASR standard curing conditions was only 0.21%, which was about 7% lower than the expansion rate of the baseline group (without any admixture). The inhibition effect increased with increasing admixture dosage, but excessive dosage caused agglomeration, resulting in the inhibition effect only becoming apparent in later stages.

[0051] Example 5 The composition contains 2.5% rubber powder by mass, with a particle size of 120 mesh, and 97.5% PO-42.5 silicate cement by mass.

[0052] The concrete prepared using the composition of Example 5 was tested. The expansion rate of the 56-day concrete mortar bars under ASR standard curing conditions was 35.9% lower than that of the baseline group (without any additives). Furthermore, the expansion inhibition effect was most significant at 365 days when standard curing was applied to concrete prisms. Therefore, the addition of rubber powder alone can significantly reduce the risk of expansion due to the alkali-silica reaction. However, in the experiment, the compressive strength of the 120-mesh test group was 24% lower than that of the baseline group at 90 days, and the compressive strength of the 80-mesh test group was 19% lower than that of the baseline group at 90 days. Therefore, it is not recommended to add rubber powder alone in engineering applications; other mineral admixtures can be added to compensate for the loss in mechanical properties.

[0053] Example 6 The composition contains 10% silica fume by mass, with a silica fume fineness of 1600 mesh; and 90% PO-42.5 silicate cement by mass.

[0054] The amount of silica fume added was examined, and a 10% dosage showed the best inhibitory effect, with an expansion rate much lower than the baseline group at 56 days. However, as the hydration reaction proceeded, the silica fume was gradually consumed, and the inhibitory effect did not increase significantly in the later stages.

[0055] Example 7 The fly ash mass fraction is 10%, and the fly ash density is 2.42 g / cm³. 3 The loss on ignition is 2.86%, and the mass fraction of PO-42.5 silicate cement is 90%.

[0056] Concrete prepared using the composition of Example 7 was tested and found to reduce the risk of alkali-silica reaction expansion. After 364 days, the expansion rate of concrete mortar bars under ASR standard curing conditions was 0.73%, and the expansion rate of concrete prisms under standard curing conditions was 0.104% after 364 days. Furthermore, the 56-day compressive strength was 8.4% higher than the baseline group.

[0057] Example 8 Polypropylene fiber density is 0.8-1.2 kg / m³. 3 The length is 9mm-12mm and the content is 0.1%-0.2%.

[0058] Concrete prepared from the composition of Example 8 was tested. The results showed that increasing the admixture dosage and length significantly reduced the risk of alkali-silica reaction expansion, and the inhibitory effect gradually increased with cement hydration time. Simultaneously, the compressive strength also increased positively with increasing admixture dosage (0.2%, 1.2 kg / m²). 3 Polypropylene fiber reinforced concrete mortar rods with a length of 12 mm showed a 20.7% reduction in expansion after 119 days under ASR standard curing conditions, and the concrete prisms also exhibited the best inhibition effect under standard curing conditions. The concrete prepared using the composition in Example 8 showed a 10.75% increase in 90-day strength compared to the baseline group.

[0059] Example 9 The rice husk ash content is 11%, and the median particle size of the rice husk ash is 2.629μm; the metakaolin content is 8%, and the fineness of the metakaolin is 1500 mesh; the remainder is PO-42.5 silicate cement.

[0060] Example 10 The ceramic polishing slag has a mass fraction of 20%, and the particle size of the ceramic polishing slag is no greater than 0.16 mm. The silica fume has a mass fraction of 8%, and the silica fume fineness is no less than 1600 mesh. The remainder is PO-42.5 silicate cement.

[0061] Example 11 The mass fraction of rubber powder is 2.5%, and the particle size of rubber powder is 120 mesh; the mass fraction of silica fume replacing cement is 10%, and the fineness of silica fume is not less than 1600 mesh; the remainder is PO-42.5 silicate cement.

[0062] The concrete prepared by the composition of Example 10 was tested. Compared with the baseline group, the expansion inhibition rate of the concrete mortar bar under ASR standard curing conditions reached 85.7% after 364 days, and the expansion inhibition rate of the concrete prism under standard curing conditions reached 96.97% after 364 days. The inhibition effect was better than the single-admixture scheme, and it also had a certain repair effect on the mechanical property loss caused by the single admixture of rubber powder.

[0063] Example 12 The rubber powder has a mass fraction of 2.5% and a particle size of 120 mesh; the polypropylene fiber content is 1.2 kg / m². 3 The polypropylene fiber is 12mm long and contains 0.2% polypropylene, with the remainder being PO-42.5 silicate cement.

[0064] The concrete prepared by the composition of Example 12 was tested. The inhibition effect of the compound admixture scheme was better than that of the single admixture of rubber powder or polypropylene fiber. At the same time, it made up for the loss of mechanical properties caused by the addition of rubber powder, and the mechanical strength was also guaranteed.

[0065] Example 13 The fly ash has a mass fraction of 10% and a density of 2.42 kg / cm³. 3 The rice husk ash content is 7% by mass, the median particle size of the rice husk ash is 2.629μm, and the remainder is PO-42.5 silicate cement.

[0066] Example 14 The rest is the same as in Example 13, except that the mass fraction of rice husk ash is 8%.

[0067] Example 15 The rest is the same as in Example 13, except that the mass fraction of rice husk ash is 9%.

[0068] Example 16 The rest is the same as in Example 13, except that the mass fraction of rice husk ash is 10%.

[0069] Example 17 The rest is the same as in Example 13, except that the mass fraction of rice husk ash is 11%.

[0070] Concrete prepared from the compositions of Examples 13-17 was tested. The compound admixture scheme ensured both the expansion inhibition effect and compensated for the mechanical property loss caused by the single admixture of rice husk ash. The expansion inhibition effect of 11% rice husk ash + 10% fly ash was the best. Under ASR standard curing conditions, the expansion rate of concrete mortar bars was 0.48% after 364 days, which was 66.2% higher than the baseline group. The expansion rate of concrete prisms under standard curing conditions was less than 0.04% after 364 days. In terms of improving mechanical properties, 7% rice husk ash + 10% fly ash improved by 21.8% compared with the baseline group, while 11% rice husk ash + 10% fly ash was the second best.

[0071] Example 18 The rubber powder has a mass fraction of 2.5% and a particle size of 120 mesh; the high-purity cement has a mass fraction of 9% and a particle size of 1250 mesh; the remainder is PO-42.5 silicate cement.

[0072] Example 19 The rubber powder has a mass fraction of 2.5% and a particle size of 120 mesh; the high-purity cement has a mass fraction of 13% and a particle size of 1250 mesh; the remainder is PO-42.5 silicate cement.

[0073] The combined blending schemes of Examples 18 and 19 were tested, and their effect in inhibiting swelling was better than that of single blending of rubber powder and metakaolin.

[0074] Although illustrative embodiments have been demonstrated and described, those skilled in the art should understand that the above embodiments should not be construed as limiting the present application, and that changes, substitutions and modifications can be made to the embodiments without departing from the spirit, principles and scope of the present application.

Claims

1. A composition for inhibiting the alkali-silica reaction in concrete, characterized in that, include: Silicate cement and doping components, wherein the doping components are selected from one or more of the following: ceramic polishing slag, rice husk ash, metakaolin, rubber powder, silica fume, fly ash, and polypropylene fiber. The content of the doped component is 0.1%-25% based on the total mass of the composition.

2. The composition according to claim 1, characterized in that, The doping component is the ceramic polishing slag, and the content of the ceramic polishing slag is 17% to 23% based on the total mass of the composition.

3. The composition according to claim 1, characterized in that, The dopant component is rice husk ash, and the content of rice husk ash is 7% to 11% based on the total mass of the composition.

4. The composition according to claim 1, characterized in that, The dopant component is the metakaolin, and the content of the metakaolin is 9% to 20% based on the total mass of the composition.

5. The composition according to claim 1, characterized in that, The dopant component is the rubber powder, and the content of the rubber powder is 2%-3% based on the total mass of the composition.

6. The composition according to claim 1, characterized in that, The doping component is the silica fume, and the silica fume content is 5-10% based on the total mass of the composition.

7. The composition according to claim 1, characterized in that, The dopant component is the fly ash, and the fly ash content is 9%-10% based on the total mass of the composition.

8. The composition according to claim 1, characterized in that, The dopant component is the polypropylene fiber, and the content of the polypropylene fiber is 0.1%-0.2% based on the total mass of the composition.

9. The composition according to claim 1, characterized in that, The doping component is selected from two of the following: ceramic polishing slag, rice husk ash, metakaolin, rubber powder, silica fume, fly ash, and polypropylene fiber. When the doping component includes the rubber powder, the total content of the doping component is 0.1%-15% based on the total mass of the composition; When the doping component includes the rice husk ash, the total content of the doping component is 5%-10% based on the total mass of the composition.

10. The composition according to any one of claims 1-9, characterized in that, The method satisfies at least one of the following conditions: The ceramic polishing slag has a particle size of no more than 0.16 mm and a specific surface area of ​​300-350 m² / kg. The median particle size of the rice husk ash is 2-3 μm; The fineness of the metakaolin is 1200-1500 mesh; The particle size of the rubber powder is 80-120 mesh; The fineness of the silica fume is not less than 1600 mesh; The density of the polypropylene fiber is 0.8-1.2 kg / m³. 3 The length is 9-12mm; The density of the fly ash is 2-3 kg / cm³. 3 ; The silicate cement includes PO-42.5 silicate cement.

11. The composition according to claim 10, characterized in that, The doping components include rice husk ash, and either the meta-high terrestrial material or the fly ash. The rice husk ash content is 6%-10%. The content of metakaolin is 5% to 8%, or... The fly ash content is 8%-10%.

12. The composition according to claim 10, characterized in that, The doping components include ceramic polishing slag and silica fume, wherein the content of ceramic polishing slag is 15-20% and the content of silica fume is 5-8% based on the total mass of the composition.

13. The composition according to claim 10, characterized in that, The doping component includes the rubber powder, and one selected from silica fume, polypropylene fiber, and metakaolin. Based on the total mass of the composition, the rubber powder content is 2%-3%, the silica fume content is 9%-13%, the polypropylene fiber content is 0.1%-0.2%, or the metakaolin content is 9%-13%.

14. A method for preparing concrete using the composition according to any one of claims 1-13, characterized in that, include: The composition is mixed with water so that the water-to-binder ratio of the mixed material is 0.4-0.5.