A cementitious material for a multi-coupled system, its preparation method and application

Abstract

The present invention provides a multi-component coupling system cementitious material, its preparation method and application. The multi-component coupling system cementitious material comprises the following components in mass percentages: 60% - 80% of active powder, 5% - 20% of nano-filling material, 10% - 15% of toughening material, and 5% - 13% of chemical modifier. The multi-component coupling system cementitious material prepared by the present invention has hydration and hardening characteristics similar to those of cement. At the same time, it has higher toughness, lower heat of hydration and stronger chemical erosion resistance than traditional cement. It can be used alone to prepare concrete with strength grades from C10 to C100, or can be used in any proportion with cement, capable of saving more than 50% of the cement consumption in traditional concrete and minimizing the cost of concrete to the greatest extent.

Description

Technical Field

[0001] The present invention belongs to the technical field of building materials, and particularly relates to a cementitious material for a multi-element coupling system, a preparation method thereof, and an application thereof. Background Art

[0002] Although traditional cementitious materials such as cement-based cementitious materials are widely used, they often have the following defects: (1) Insufficient toughness: Cement-based cementitious materials can achieve relatively high compressive strength, but their tensile strength and toughness are relatively low, belonging to typical brittle materials; (2) Poor crack resistance: Cement-based cementitious materials are prone to shrinkage cracks during the hardening process, especially in the early stage. The cracks not only affect the overall aesthetics of the material but also reduce its durability and service life; (3) Poor durability: Cement-based cementitious materials have insufficient ability to resist environmental erosion and maintain stable performance during long-term use, usually showing poor chloride ion permeability resistance, insufficient carbonation resistance, and poor airtightness, etc.

[0003] Gasification slag, biomass incineration ash, ammonia soda white mud, etc. are common solid wastes in industrial production. Biomass incineration ash generally contains rich mineral elements and can be applied to farmland as fertilizer in a certain proportion or directly landfilled, but it is easy to cause environmental pollution; Ammonia soda white mud can not only be used as a soil conditioner but also be used to prepare ceramics and refractory materials or produce cement and concrete. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a cementitious material for a multi-element coupling system, a preparation method thereof, and an application thereof in view of the above-mentioned deficiencies of the prior art. The cementitious material for the multi-element coupling system prepared by the present invention not only has hydration and hardening characteristics similar to those of cement, which is essentially different from admixtures such as mineral powder and fly ash without self-hardening property, but also has advantageous characteristics that traditional cement does not have. It has higher toughness, lower heat of hydration, strong chemical erosion resistance, and is low-carbon and energy-saving. It can save more than 50% of the cement consumption in traditional concrete and maximize the reduction of concrete cost.

[0005] To solve the above technical problem, the technical solution adopted by the present invention is: A cementitious material for a multi-element coupling system, the cementitious material for the multi-element coupling system includes the following components in mass percentage: 60% - 80% of active powder, 5% - 20% of nano-filling material, 10% - 15% of toughening material, 5% - 13% of chemical modifier; wherein,

[0006] The active powder includes highly active amorphous silica powder, ultrafine gasification slag powder, and ultrafine biomass incineration ash, providing the cementitious property of the material; The quality of the highly active amorphous silica powder meets the requirements of SF90 grade in GB / T27690 - 2023 "Silica Fume for Mortar and Concrete"; The specific surface area of the ultrafine gasification slag powder is 400 - 500m 2 / kg, water demand ratio ≤ 100, activity index ≥ 60%; the specific surface area of the ultrafine biomass incineration ash ≥ 600m 2 / kg, water demand ratio ≤ 110, activity index ≥ 85%;

[0007] The nano-filling material includes nano-ceramic powder and nano-calcium carbonate, which improves the gradation of the cementitious material and enhances the durability and erosion resistance; the particle size of the nano-ceramic powder is 50 - 100nm; the particle size of the nano-calcium carbonate ≤ 100nm, and the quality meets the requirements of GB / T19590 - 2023;

[0008] The toughening material includes rubber powder and polyvinyl alcohol, which improves the toughness and crack resistance of the material; the rubber powder is 20 - 60 mesh, and the quality meets the requirements of GB / T 19208 - 2020;

[0009] The chemical modifier includes modified sorbitol, ammonia soda white mud and sodium fluorosilicate, which increases the gelling ability of the reactive powder; the pH value of the ammonia soda white mud ≥ 9.0, the limit value of heavy metal leaching concentration complies with the provisions of GB / T 30810 - 2014, and the radioactive index complies with the provisions of GB 6566 - 2010.

[0010] Preferably, the multi-component coupled system cementitious material includes the following components by mass percentage: 25% - 40% of highly active amorphous silica powder, 10% - 30% of ultrafine gasification slag powder, 10% - 15% of ultrafine biomass incineration ash, 2% - 10% of nano-ceramic powder, 3% - 10% of nano-calcium carbonate, 5% - 8% of rubber powder, 5% - 7% of polyvinyl alcohol, 3% - 5% of modified sorbitol, 1% - 3% of ammonia soda white mud, 2% - 5% of sodium fluorosilicate.

[0011] The present invention also provides a preparation method of the multi-component coupled system cementitious material, which includes the following steps:

[0012] S1. Add the highly active amorphous silica powder, ultrafine gasification slag powder, and ultrafine biomass incineration ash into an ultrafine vertical mill, grind to a specific surface area of 1000 - 1200m 2 / kg and then enter a high-efficiency separator. Those with a specific surface area not meeting the requirements are re-entered into the ultrafine vertical mill for grinding to obtain a mixed reactive powder;

[0013] S2. Add the mixed reactive powder obtained in S1, together with modified sorbitol, ammonia soda white mud, sodium fluorosilicate, nano-ceramic powder, nano-calcium carbonate, rubber powder and polyvinyl alcohol, into a horizontal ball mill, mix evenly, and finally obtain the multi-component coupled system cementitious material.

[0014] The present invention also provides an application of the multi-component coupling system cementitious material. The multi-component coupling system cementitious material can be used alone to prepare concrete with a strength grade of C10 - C100, or can be used in combination with cement to prepare concrete, and can also add doping materials such as cement, mineral powder, and fly ash.

[0015] Due to the adoption of the above technical solutions, the present invention has significant technical effects:

[0016] 1. The present invention provides a multi-component coupling system cementitious material and a preparation method thereof. The obtained multi-component coupling system cementitious material has hydration and hardening characteristics similar to those of cement, which is essentially different from admixtures such as mineral powder and fly ash that do not have self-hardening properties. At the same time, it has advantageous characteristics that traditional cement does not have, including: (1) Higher toughness, the flexural-compressive ratio of traditional cement is 0.17 - 0.22, and the flexural-compressive ratio of the multi-component coupling system cementitious material is 0.20 - 0.31; (2) Low heat of hydration, only 50% of that of traditional cement, which is particularly suitable for mass concrete; (3) Strong resistance to chemical erosion, which is particularly suitable for marine engineering applications and multi-component coupling complex service environments; (4) Low-carbon and energy-saving, with carbon emissions only 10% of those of traditional cement and energy consumption only 20% of that of traditional cement.

[0017] 2. The present invention regulates the ratio and composition of active powder and nano-filling material through a multi-level micro-nano structure regulation technology, realizing the optimization of the microstructure of the cementitious material. This technology changes the van der Waals force between the particles of the powder material, thereby effectively reducing the porosity of the material and enhancing the denseness of the microstructure.

[0018] By adding specific chemical modifiers to the cementitious material, the molecular chain structure and interaction mode inside the material during the preparation of the concrete material are changed during application, enabling the mixture to form a more stable and dense network structure during the curing process, thereby greatly improving the tensile strength and compressive strength of the concrete material. The coupling effect of the toughening material and the chemical modifier forms a more stable interface layer in the concrete material. Polyvinyl alcohol and rubber powder enhance the toughness and crack resistance of the concrete material through physical cross-linking and intermolecular forces, while the introduction of modified sorbitol and ammonia soda white mud optimizes the micro-interface structure of the material, increases the bonding force between the cement matrix and the filling material, and improves the impermeability and durability of the concrete material.

[0019] 3. The present invention uses industrial solid wastes such as gasification slag, biomass incineration ash, and ammonia soda white mud as the main raw materials, which can greatly consume solid wastes, achieve resource allocation, and is economical and environmentally friendly. The prepared multi-component coupling system cementitious material can be used alone to prepare concrete with a strength grade of C10 - C100, or can be used in combination with cement in any proportion, and can save more than 50% of the cement consumption in traditional concrete, minimizing the cost of concrete to the greatest extent.

[0020] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. Description of the Drawings

[0021] Figure 1 is the process flow chart of the preparation of the multi - component coupling system cementitious material of the present invention;

[0022] Figure 2 is the shrinkage test chart of the C40 multi - component coupling system cementitious material without - cement low - carbon concrete in Example 8 of the present invention;

[0023] Figure 3 is the test sample chart of the electric flux of the C40 multi - component coupling system cementitious material without - cement low - carbon concrete in Example 8 of the present invention;

[0024] Figure 4 is the frost resistance test chart of the C40 multi - component coupling system cementitious material without - cement low - carbon concrete in Example 8 of the present invention;

[0025] Figure 5 is the frost resistance test chart of the C40 multi - component coupling system cementitious material without - cement low - carbon concrete in Example 8 of the present invention. Detailed Embodiments

[0026] Example 1

[0027] This example is a multi - component coupling system cementitious material, including the following components in mass percentages: 40% of highly active amorphous silica powder, 11% of ultra - fine gasified slag micro - powder, 13% of ultra - fine biomass incineration ash, 10% of nano - ceramic powder, 3% of nano - calcium carbonate, 5% of rubber powder, 7% of polyvinyl alcohol, 5% of modified sorbitol, 1% of ammonia - soda white mud, and 5% of sodium fluorosilicate.

[0028] As Figure 1 shown, the preparation method of the multi - component coupling system cementitious material includes the following steps:

[0029] S1. Add the highly active amorphous silica powder, ultra - fine gasified slag micro - powder, and ultra - fine biomass incineration ash into an ultra - fine vertical mill, grind to 1000 - 1200 m 2 / kg, then enter a high - efficiency powder separator. If the specific surface area does not meet the requirements, it will re - enter the ultra - fine vertical mill through the closed - circuit air - separation system for re - grinding to obtain a mixed active powder;

[0030] S2. Add the mixed active powder obtained in S1, together with modified sorbitol, ammonia - soda white mud, sodium fluorosilicate, nano - ceramic powder, nano - calcium carbonate, rubber powder, and polyvinyl alcohol, into a horizontal ball mill, mix evenly, and finally obtain the multi - component coupling system cementitious material.

[0031] Example 2

[0032] This embodiment is a cementitious material for a multi - element coupling system, comprising the following components by mass percentage: 34% of highly active amorphous silica powder, 20% of ultra - fine gasified slag micro - powder, 15% of ultra - fine biomass incineration ash, 6% of nano - ceramic powder, 6% of nano - calcium carbonate, 6% of rubber powder, 5% of polyvinyl alcohol, 4% of modified sorbitol, 2% of ammonia - soda white mud, and 2% of sodium fluorosilicate. The preparation method is the same as that in Example 1.

[0033] Example 3

[0034] This embodiment is a cementitious material for a multi - element coupling system, comprising the following components by mass percentage: 25% of highly active amorphous silica powder, 30% of ultra - fine gasified slag micro - powder, 10% of ultra - fine biomass incineration ash, 2% of nano - ceramic powder, 10% of nano - calcium carbonate, 8% of rubber powder, 6% of polyvinyl alcohol, 3% of modified sorbitol, 3% of ammonia - soda white mud, and 3% of sodium fluorosilicate. The preparation method is the same as that in Example 1.

[0035] Example 4

[0036] This embodiment is a cementitious material for a multi - element coupling system, comprising the following components by mass percentage: 30% of highly active amorphous silica powder, 20% of ultra - fine gasified slag micro - powder, 10% of ultra - fine biomass incineration ash, 5% of nano - ceramic powder, 7% of nano - calcium carbonate, 8% of rubber powder, 7% of polyvinyl alcohol, 5% of modified sorbitol, 3% of ammonia - soda white mud, and 5% of sodium fluorosilicate. The preparation method is the same as that in Example 1.

[0037] Example 5

[0038] This embodiment is a cementitious material for a multi - element coupling system, comprising the following components by mass percentage: 40% of highly active amorphous silica powder, 25% of ultra - fine gasified slag micro - powder, 15% of ultra - fine biomass incineration ash, 2% of nano - ceramic powder, 3% of nano - calcium carbonate, 5% of rubber powder, 5% of polyvinyl alcohol, 2% of modified sorbitol, 1% of ammonia - soda white mud, and 2% of sodium fluorosilicate. The preparation method is the same as that in Example 1.

[0039] Example 6

[0040] In this embodiment, the multi - element coupling system cementitious materials prepared in Examples 1 - 5 are admixed with cement in different proportions for performance testing and compared with the traditional cementitious material, cement. Among them, the determination of the standard consistency water consumption, setting time, and soundness refers to GB / T 1346 - 2011, the determination of fluidity refers to GB / T 2419 - 2005, and the determination of strength refers to GB / T17671 - 2021. The results are shown in Table 1.

[0041] Table 1 Performance comparison between the multi - element coupling system cementitious material and cement

[0042] ;

[0043] The above results show that the multi - component coupling system cementitious material of the present invention can be used alone to prepare concrete with strength grades from C10 to C100, or can be used in any proportion with cement, which can save more than 50% of the cement consumption in traditional concrete and minimize the concrete cost to the greatest extent. At the same time, it also shows that the mechanical properties of the multi - component coupling system cementitious materials prepared in different embodiments of the present invention can all meet the national standards of P·O42.5 cement and have excellent performance. The multi - component coupling system cementitious material prepared by the present invention has hydration and hardening characteristics similar to those of cement, which is essentially different from admixtures such as mineral powder and fly ash that do not have self - hardening properties. At the same time, it has advantageous features that traditional cement does not have, including: (1) Higher toughness, the flexural - compression ratio of traditional cement is 0.17 - 0.22, while the flexural - compression ratio of the multi - component coupling system cementitious material is 0.20 - 0.31; (2) Low heat of hydration, only 50% of that of traditional cement, which is especially suitable for mass concrete; (3) Strong resistance to chemical erosion, especially suitable for marine engineering applications and multi - component coupling complex service environments; (4) Low - carbon and energy - saving, with carbon emissions only 10% of those of traditional cement and energy consumption only 20% of that of traditional cement.

[0044] Example 7

[0045] This example is about the application of the multi - component coupling system cementitious material in concrete. The multi - component coupling system cementitious material prepared in Example 1 of the present invention is used to prepare cement + multi - component coupling system cementitious material concrete, and its performance differences from conventional cement + fly ash + mineral powder cementitious material concrete are compared.

[0046] 1. Cement + multi - component coupling system cementitious material concrete

[0047] The raw materials include: cement, multi - component coupling system cementitious material, sand, stone, water, and admixture. The concrete formulations and compressive strength test results of different grades are shown in Table 2:

[0048] Table 2 Mix proportion of cement + multi - component coupling system cementitious material concrete (kg / m 3 )

[0049] .

[0050] 2. Conventional cement + fly ash + mineral powder cementitious material concrete

[0051] The raw materials include: cement, fly ash, mineral powder, sand, stone, water, and admixture. The concrete formulations and compressive strength test results of different grades are shown in Table 3:

[0052] Table 3 Mix proportion of cement + fly ash + mineral powder conventional cementitious material concrete (kg / m 3 )

[0053] .

[0054] The multi - coupled system cementitious material prepared by the present invention is made into concrete with cement, sand, stone, and admixtures, and its performance is compared with that of the concrete prepared by the traditional cementitious materials of cement, fly ash, and slag powder. The results are as follows:

[0055] Table 4 Comparison of the durability performance between the concrete with the multi - coupled system cementitious material and the concrete with the conventional cementitious material

[0056] ;

[0057] The results show that under the same strength grade, the compressive strength of the concrete with the multi - coupled system cementitious material is generally higher than that of the concrete with the conventional cementitious material of cement + fly ash + slag powder at each age. Generally speaking, with the increase of the strength grade of the concrete with the multi - coupled system cementitious material, the growth rate of the compressive strength is also quite remarkable. From grade C30 to grade C60, its compressive strength gradually increases and the gap between each strength grade is obvious, indicating that the multi - coupled system cementitious material has a significant effect on improving the compressive capacity of concrete.

[0058] The chloride ion migration coefficient and electric flux of the concrete with the multi - coupled system cementitious material are significantly lower than those of the concrete with the conventional cementitious material of cement + fly ash + slag powder. Moreover, with the increase of the concrete strength grade, the chloride ion migration coefficient and electric flux are lower, which means that the concrete has a stronger ability to resist chloride ion erosion. In scenarios such as marine environments and deicing salt - using environments where there is a risk of chloride ion corrosion, the concrete with the multi - coupled system cementitious material can better guarantee the durability of the structure.

[0059] The shrinkage rate of the concrete with the multi - coupled system cementitious material is generally lower than that of the concrete with the conventional cementitious material. At grade C30, the shrinkage rate of the former is 100×10 -6 , and that of the latter is 215×10 -6 ; at grade C60, the former is 135×10 -6 , and that of the latter is 285×10 -6 . The lower shrinkage rate means that the internal stress generated by the volume change of the concrete during the hardening process is smaller, thus effectively reducing the cracks generated by the shrinkage of the concrete. This not only improves the crack - resistance performance of the concrete but also enhances its durability, preventing external harmful substances from invading the interior of the concrete through the cracks and further extending the service life of the concrete structure.

[0060] In terms of tensile strength, the cementitious material concrete of the multi - element coupling system also shows significant advantages: when it comes to concrete of strength grade C30, its tensile strength can reach 3.5 MPa, while that of the conventional cementitious material concrete of the same grade is only 2.1 MPa; when it comes to concrete of strength grade C40, the tensile strength of the former is 3.8 MPa and that of the latter is 2.2 MPa; when it comes to concrete of strength grade C50, the tensile strength of the former is 4.0 MPa and that of the latter is 2.3 MPa; when it comes to concrete of strength grade C60, the tensile strength of the former can reach 4.5 MPa, while that of the latter is only 2.6 MPa. The higher tensile strength enables the concrete to better resist deformation and cracking when subjected to tensile stress, which is crucial for the integrity and stability of concrete structures under complex stress states such as bending and shear. This characteristic can effectively avoid structural failure caused by tensile failure and significantly improve the reliability and durability of concrete structures. Therefore, the cementitious material concrete of the multi - element coupling system is of great significance in the seismic design of concrete, prestressed concrete structures, and other scenarios with high requirements for structural integrity.

[0061] Example 8

[0062] This example is to prepare C40 - grade multi - element coupling system cement - free low - carbon concrete using the multi - element coupling system cementitious material obtained in Example 1 of the present invention, and study its mechanical properties, long - term properties, and durability.

[0063] The raw materials include: multi - element coupling system cementitious material, fine sand, manufactured sand, gravel, water, and admixture; the concrete formula is shown in Table 5:

[0064] Table 5 Formula of C40 multi - element coupling system cement - free low - carbon concrete

[0065] ;

[0066] (1)Mechanical property test of C40 cement - free low - carbon concrete with multi - element coupling system cementitious material.

[0067] Table 6 Comparison of mechanical properties between multi - element coupling system cement - free low - carbon concrete and conventional concrete

[0068] ;

[0069] It is found that the cementless low-carbon concrete with multi-component coupling system cementitious materials shows good compressive strength development in both the early and late stages. Especially at the age of 28 days, its compressive strength is significantly higher than that of conventional concrete. The tensile strength of the concrete with multi-component coupling system cementitious materials is much higher than that of conventional concrete, which can better resist the deformation and fracture caused by external forces, indicating its obvious advantages in crack resistance and toughness. It is proved that the present invention realizes the optimization of the microstructure of the cementitious material by regulating the ratio and composition of the reactive powder and the nano-filling material through the multi-level micro-nano structure regulation technology. This technology changes the van der Waals force between the particles of the powder material, thus effectively reducing the porosity of the material and enhancing the density of the microstructure. In addition, by adding specific chemical modifiers to the cementitious material, the molecular chain structure and the interaction mode inside the material during the preparation process of the concrete material are changed during application, so that a more stable and dense network structure can be formed during the curing process of the mixture, thereby greatly improving the tensile strength and toughness of the concrete material.

[0070] (2) Long-term performance and durability tests of C40 cementless low-carbon concrete with multi-component coupling system cementitious materials.

[0071] ① Long-term performance test - shrinkage test (contact method), see Figure 2 , and the test results are shown in Table 7:

[0072] Table 7 Shrinkage test results of C40 cementless low-carbon concrete with multi-component coupling system cementitious materials

[0073] ;

[0074] The results show that under the C40 strength grade, the cementless low-carbon concrete with multi-component coupling system cementitious materials shows obvious advantages in shrinkage performance. Its shrinkage rate is only 80.5×10 -6 , compared with the shrinkage rate of up to 240×10 -6 of conventional concrete, the reduction amplitude is extremely significant. Such a low shrinkage rate means that the deformation amount generated by shrinkage during the hardening process of the concrete is extremely small. This characteristic can effectively reduce the generation and development of microcracks inside the concrete, greatly improving the crack resistance of the concrete structure. During long-term use, it can effectively prevent external moisture, harmful chemical substances, etc. from invading the inside of the concrete through the cracks, thereby enhancing the durability of the concrete structure and extending its service life, providing a more reliable material choice for various construction projects with strict requirements for shrinkage deformation control.

[0075] ② Durability test - chloride ion penetration resistance, and the results are shown in Table 8:

[0076] Table 8 Chloride ion penetration resistance results of C40 cementless low-carbon concrete with multi-component coupling system cementitious materials

[0077] ;

[0078] The electric flux test samples are as Figure 3 shown. The results show that the chloride ion penetration resistance of the cement-free low-carbon concrete with the C40 multi-coupled system cementitious material reaches the technical requirements of the highest grade of high-performance concrete: RCM-V and Q-V grades, meeting the design service life of 100 years.

[0079] ③ Durability test - sulfate attack resistance, and the results are shown in Table 9:

[0080] Table 9 Results of sulfate attack resistance of the cement-free low-carbon concrete with the C40 multi-coupled system cementitious material

[0081] ;

[0082] The results show that compared with the specimens not attacked by sulfate, the compressive strength of the sulfate-attacked specimens has no loss. The corrosion resistance coefficient of the cement-free low-carbon concrete with the C40 multi-coupled system cementitious material is 102% when the sulfate attack resistance grade is KS120, far exceeding the national standard requirement of 75%, meeting the requirements of the KS120 grade.

[0083] ④ Durability test - frost resistance (rapid freezing method), see Figure 4 and Figure 5 , and the test results are shown in Table 10:

[0084] Table 10 Test results of frost resistance of the cement-free low-carbon concrete with the C40 multi-coupled system cementitious material

[0085] ;

[0086] The results show that both the mass loss and the relative dynamic elastic modulus of the cement-free low-carbon concrete with the C40 multi-coupled system cementitious material of the present invention meet the index requirements of the F250 grade.

[0087] The above results prove that in the multi-coupled system cementitious material of the present invention, the coupling effect of the toughening material and the chemical modifier forms a more stable interfacial layer in the cementitious material. Polyvinyl alcohol and rubber powder enhance the crack resistance (shrinkage rate) of the concrete material through physical crosslinking and intermolecular forces. The introduction of modified sorbitol and ammonia soda white mud optimizes the microscopic interfacial structure of the material, increases the bonding force between the cement matrix and the filling material, and improves the impermeability (chloride ion penetration resistance) and durability (chloride ion penetration resistance, sulfate attack resistance, frost resistance) of the concrete material.

[0088] In summary, the present invention provides a multi-component coupled system cementitious material and a preparation method thereof. The obtained multi-component coupled system cementitious material can be used alone to prepare concrete with a strength grade of C10-C100, or can be used in any proportion with cement, which can save more than 50% of the cement consumption in traditional concrete and minimize the cost of concrete. It is a promising new cementitious material that can replace cement. When the multi-component coupled system cementitious material prepared by the present invention is used to prepare concrete, its compressive strength and tensile strength are higher than those of conventional concrete, and it has obvious advantages in terms of compressive performance, crack resistance and toughness. Moreover, the chloride ion migration coefficient, electric flux and shrinkage rate are significantly lower than those of conventional concrete, with better corrosion resistance and higher durability, which can effectively extend its service life.

[0089] The above is only a preferred embodiment of the present invention and does not impose any limitation on the present invention. Any simple modification, change and equivalent change made to the above embodiments according to the technical essence of the invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A multi-element coupling system gelling material, characterized in that: The multi-coupling system gelling material comprises the following components in percentage by mass: 60% to 80% active powder, 5% to 20% nano-filling material, 10% to 15% toughening material, and 5% to 13% chemical modifier; wherein, The active powder includes highly active amorphous silicon dioxide powder, ultrafine gasified slag powder and ultrafine biomass incineration ash; The nano-filling material includes nano-ceramic powder and nano-calcium carbonate; The toughening material includes rubber powder and polyvinyl alcohol; The chemical modifiers include modified sorbitol, ammonia-alkali white mud and sodium fluorosilicate.

2. The multi-element coupling system gelling material according to claim 1, characterized in that: The highly active amorphous silicon dioxide powder is SF90 grade silica fume for mortar and concrete; the ultrafine gasified slag powder has a specific surface area of ​​400-500m 2 / kg, water requirement ratio ≤100, activity index ≥60%; the specific surface area of ​​the ultrafine biomass incineration ash ≥600m 2 / kg, water requirement ratio ≤110, activity index ≥85%.

3. The multi-element coupling system gelling material according to claim 1, characterized in that: The particle size of the nano ceramic powder is 50-100 nm; the particle size of the nano calcium carbonate is ≤100 nm.

4. The multi-element coupling system gelling material according to claim 1, characterized in that: The rubber powder has a mesh size of 20-60.

5. The multi-element coupling system gelling material according to claim 1, characterized in that: The pH value of the ammonia-soda white mud is ≥9.

0.

6. The multi-element coupling system gelling material according to claim 1, characterized in that: The multi-coupling system gelling material comprises the following components in percentage by mass: 25% to 40% of high-activity amorphous silicon dioxide powder, 10% to 30% of ultrafine gasified slag powder, 10% to 15% of ultrafine biomass incineration ash, 2% to 10% of nano-ceramic powder, 3% to 10% of nano-calcium carbonate, 5% to 8% of rubber powder, 5% to 7% of polyvinyl alcohol, 3% to 5% of modified sorbitol, 1% to 3% of ammonia-alkali white mud, and 2% to 5% of sodium fluorosilicate.

7. A method for preparing the multi-element coupling system gelling material according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1. Add high-activity amorphous silicon dioxide powder, ultrafine gasification slag powder and ultrafine biomass incineration ash into the ultrafine vertical grinding mill and grind them to a specific surface area of ​​1000~1200m 2 / kg enters the high-efficiency powder concentrator, and those with specific surface area that do not meet the requirements enter the ultra-fine vertical grinding mill for grinding to obtain mixed active powder; S2. Add the mixed active powder obtained in S1, modified sorbitol, ammonia-alkali white mud, sodium fluorosilicate, nano-ceramic powder, nano-calcium carbonate, rubber powder and polyvinyl alcohol into a horizontal ball mill, mix them evenly, and finally obtain a multi-element coupling system gelling material.

8. An application of the multi-element coupling system gelling material according to claim 1, characterized in that: The multi-element coupling system cementitious material is used alone to prepare C10-C100 strength grade concrete, or is used in combination with cement to prepare concrete.

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