Composite viscosity reduction and temperature rise inhibition material and preparation method and application thereof

Abstract

The invention discloses a composite viscosity reduction and temperature rise inhibition material as well as a preparation method and application thereof, and belongs to the technical field of building materials. The material is prepared from the following components in percentage by mass: 91.5 to 97.9 percent of a surface modified mineral viscosity reducer, 0.1 to 0.3 percent of a composite functional hydration temperature rise inhibition system and 2 to 8.4 percent of a microstructure regulating agent, wherein the total mass of the surface modified mineral viscosity reducer and the composite functional hydration temperature rise inhibition system is 100 percent; the surface modification type mineral viscosity reducer comprises at least two of metakaolin, silica fume, superfine limestone powder, superfine fly ash and fly ash microspheres; the composite functional hydration temperature rise inhibition system is formed by compounding an early inhibition unit and a continuous regulation and control unit according to the mass ratio of 1: (0.5-2); the microstructure regulating agent is prepared by compounding an air entraining / foam stabilizing component and a nano nucleating agent according to the mass ratio of 1: (1-4). The material not only has a good viscosity reduction effect, but also can remarkably and enduringly inhibit hydration temperature rise of concrete, and is especially suitable for mass concrete.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of building materials, and more particularly relates to a composite viscosity-reducing and temperature-rise inhibiting material, a preparation method thereof and an application thereof. BACKGROUND

[0002] In modern concrete engineering, especially in large-volume concrete structures (such as water conservancy dams, various large bridge platforms, anchorage, tower seats, bridge piers and towers, etc.), there is a key technical problem: the hydration heat of cement causes the internal temperature of concrete to rise sharply, forming a significant internal and external temperature difference, and then causing large temperature stress, which causes the concrete to crack, seriously affecting the durability and safety of the structure. Therefore, effectively controlling the adiabatic temperature rise has become a core issue for inhibiting temperature cracks in large-volume concrete.

[0003] In order to improve the workability of high-yield or long-distance pumped concrete and reduce its viscosity, a variety of mineral viscosity reducers (also known as viscosity-reducing composite mineral admixtures) have been developed in the industry. These materials are usually compounded from specific minerals (such as silica fume, specific limestone powder, fly ash beads, etc.), which can effectively reduce the yield stress and plastic viscosity of concrete. However, the applicant found that this type of viscosity reducer has a significant defect: its own hydration reaction activity is relatively high, which causes the early (especially 1-3 days) hydration heat of the system to be even higher than that of concrete using fly ash, slag powder and other conventional admixtures, and in some cases even higher than that of pure cement system. This undoubtedly exacerbates the temperature control problem of large-volume concrete, limiting the popularization and application of such high-efficiency viscosity reducers.

[0004] On the other hand, there are special hydration temperature inhibitors on the market, and their mechanism is usually based on physical nucleation or chemical methods to delay cement hydration, thereby reducing the early hydration heat release rate. In laboratory mortar hydration heat tests, this type of product shows significant inhibition effect on 1-3 day hydration heat; but in actual large-volume concrete structures, due to the near adiabatic state, heat continues to accumulate and is difficult to dissipate, resulting in a significant reduction in the inhibitory effect of such inhibitors on temperature rise in the medium and long term (such as more than 7 days), and the reduction amplitude of the early temperature rise rate and the final adiabatic temperature rise of the concrete is also limited, so the application effect is not good in actual engineering.

[0005] Therefore, there is an urgent need in the technical field to develop a material that can simultaneously solve the above two problems: it has excellent viscosity-reducing performance and can effectively and durably inhibit the hydration temperature rise of concrete, especially having a significant reduction effect on the adiabatic temperature rise of large-volume concrete. SUMMARY

[0006] The present application aims to provide a composite viscosity-reducing and temperature-rise inhibiting material, a preparation method and application thereof, so as to solve the problems of the prior art.

[0007] To achieve the above-mentioned purpose, the present application provides the following solutions.

[0008] One of the technical solutions of the present application is to provide a composite viscosity-reducing and temperature-rise inhibiting material, which is composed of the following components in terms of the total mass of the material being 100%: a surface-modified mineral viscosity reducer 91.5-97.9%, a composite functional hydration temperature-rise inhibiting system 0.1-0.3%, and a microstructure regulator 2-8.4%.

[0009] The surface-modified mineral viscosity reducer is prepared by dry grinding of a base viscosity-reducing mineral and a surface modifier, the base viscosity-reducing mineral includes at least two of metakaolin, silica fume, ultra-fine limestone powder, ultra-fine fly ash, and fly ash microbeads; the composite functional hydration temperature-rise inhibiting system is compounded by an early inhibiting unit and a sustained regulating unit at a mass ratio of 1:0.5-2; and the microstructure regulator is compounded by an air entraining / stable foaming component and a nano nucleating agent at a mass ratio of 1:1-4.

[0010] In the present application, the surface modifier is a polycarboxylate superplasticizer powder or a silane coupling agent at 0.1-1.5% of the mass of the base viscosity-reducing mineral.

[0011] Preferably, the material is composed of the following components in terms of the total mass of the material being 100%: a surface-modified mineral viscosity reducer 92-96%, a composite functional hydration temperature-rise inhibiting system 0.2%, and a microstructure regulator 3-8%.

[0012] Preferably, the material is composed of the following components in terms of the total mass of the material being 100%: a surface-modified mineral viscosity reducer 93-95%, a composite functional hydration temperature-rise inhibiting system 0.2%, and a microstructure regulator 4-7%.

[0013] Preferably, the material is composed of the following components in terms of the total mass of the material being 100%: a surface-modified mineral viscosity reducer 95%, a composite functional hydration temperature-rise inhibiting system 0.2%, and a microstructure regulator 6%.

[0014] Preferably, the early inhibiting unit includes calcium nitrate and / or sodium thiosulfate.

[0015] Preferably, the sustained regulating unit includes one or more of maltodextrin, hydroxyl carboxylate, calcium saccharide, and lignin sulfonate.

[0016] Preferably, the air entraining / stabilizing component comprises one of triterpenoid saponins, hydrolyzed protein-based stabilizing agents.

[0017] Preferably, the nano-nucleating agent comprises one or more of nano-silica, nano-calcium carbonate and nano-alumina.

[0018] The second technical solution of the present application provides a preparation method of the composite viscosity-reducing and temperature-rise inhibiting material, comprising the following steps:

[0019] The predetermined proportions of the surface-modified mineral viscosity-reducing agent, the composite functional hydration temperature-rise inhibiting system and the microstructure regulating agent are mixed until the components are uniformly dispersed, and the composite viscosity-reducing and temperature-rise inhibiting material is obtained.

[0020] The third technical solution of the present application provides an application of the composite viscosity-reducing and temperature-rise inhibiting material in concrete, and the concrete comprises mass concrete.

[0021] The technical mechanism of the present application is as follows:

[0022] 1. Source modification and activity regulation mechanism (action of the surface-modified mineral viscosity-reducing agent): The traditional mineral viscosity-reducing agent has a large specific surface area, high surface energy and many active sites, and thus, while playing a physical viscosity-reducing role, it also acts as a hydration nucleation point to sharply accelerate early hydration and cause concentrated heat release. The present application introduces a polycarboxylic acid-based water reducing agent powder or a silane coupling agent as a surface modifier and co-grinds it with the basic viscosity-reducing mineral. This process is not a simple mixing, but a mechanical chemical action that anchors the modifier molecules on the surface active sites of the viscosity-reducing mineral particles in the form of chemical bonding or strong physical adsorption. The modifier molecules form a space hindrance protective layer on the particle surface, significantly enhancing the dispersibility of the basic viscosity-reducing mineral particles in the cement paste and reducing the internal friction caused by the flocculation structure, thereby amplifying the inherent viscosity-reducing effect. This layer of organic molecular film partially "shields" the high active sites on the surface of the viscosity-reducing mineral, slows down the secondary reaction rate of the viscosity-reducing agent with the cement hydration products, and weakens the concentrated heat release effect caused by the viscosity-reducing agent acting as an additional hydration nucleation point from the "source", creating a stable initial environment for the effective action of the subsequent hydration temperature-rise inhibiting agent.

[0023] 2. Whole-process hydration heat release regulation mechanism (action of the composite functional hydration temperature-rise inhibiting system): A single hydration temperature-rise inhibiting agent usually only targets a certain specific stage of the hydration process. The present application innovatively combines an early inhibiting unit and a sustained regulation unit that complement each other in mechanism and time period. The early inhibiting unit: represented by calcium nitrate, provides Ca 2+or other ions can quickly participate in and change the hydration path of minerals such as C3A in cement, prompting the formation of denser, less soluble hydrated product film wrapped around the surface of cement particles. This stage mainly strongly inhibits the initial (1-3 days) exothermic of cement, flattens the exothermic peak. Continuous control unit: represented by sodium gluconate and other hydroxyl carboxylates, the functional groups (such as -COOH, -OH) in the molecules can continuously adsorb on the surface of silicate minerals such as C3S and C2S in cement, hinder the contact of water molecules and the dissolution of ions, and at the same time, form complexation with Ca 2+ , delay the precipitation of hydration products Ca(OH)2 and C-S-H gel. This stage mainly smoothly delays the hydration process in the middle and later stages (3 days to 7 days and above), prolongs the exothermic curve, and prevents temperature rebound. The combination of the two realizes the "time sequence synergistic regulation" of the hydration exothermic process. The early unit flattens the huge exothermic peak, while the continuous unit extends the compressed exothermic process backward and further lowers it, which together realizes the dual control of the total heat release and the heat release rate, which is the key to significantly reducing the adiabatic temperature rise of mass concrete.

[0024] 3. Physical-chemical dual synergistic mechanism (the role of microstructure control agents):

[0025] Nanometer nucleating agent: nanometer-sized silica and other nucleating agents have extremely high surface activity and can act as heterogeneous nucleation points to induce C-S-H gel and other hydration products to grow preferentially on their surfaces. This process promotes the more uniform distribution of hydration products in the paste, avoiding excessive aggregation of hydration products around cement particles, thereby improving the homogeneity of the microstructure of the paste. In addition, nanometer nucleating agents can also refine the pores, optimize the pore structure, and reduce the proportion of harmful pores. At the same time, the homogeneous structure is also conducive to the uniform diffusion and transmission of internal heat, enhancing the heat diffusion capacity and effectively avoiding local heat accumulation, thereby reducing thermal stress from a physical perspective.

[0026] Air entraining / stable bubble component: by introducing a large number of small, independent, and stable closed bubbles, the performance of concrete is optimized in two ways: first, the bubbles produce a "ball bearing" effect, further improving the workability of fresh concrete; second, since still air is an excellent thermal insulator (thermal conductivity is much lower than that of cement stone), these uniformly distributed micro-bubbles form a discontinuous "thermal barrier network" inside the concrete, effectively delaying the rate of heat transfer from the core area to the outside surface of the concrete. In the adiabatic temperature rise test, this heat insulation effect directly manifests as a significant reduction in the measured apparent adiabatic temperature rise value.

[0027] The present application discloses the following technical effects:

[0028] 1. The unification of viscosity reduction and temperature reduction: Successfully solved the technical problem of high hydration heat of traditional mineral viscosity reducers. While significantly reducing the viscosity of concrete mixture (slump spread can reach more than 600 mm, and inverted slump cylinder emptying time is less than 7 s), the 1-day and 3-day hydration heat can be reduced by 20-35% compared with the system using traditional viscosity reducers, realizing the synergistic optimization of concrete workability and temperature control performance.

[0029] 2. Excellent and persistent inhibition effect on adiabatic temperature rise: Compared with the blank reference concrete, the material can reduce the adiabatic temperature rise peak value by 6-12℃, and the temperature peak appears 2-4 days later. The effect is much better than that of single hydration temperature rise inhibitor, and completely solves the industry pain point of "poor effect" of single inhibitor under adiabatic condition.

[0030] 3. Strength guarantee: The induced nucleation effect of nano nucleating agent effectively compensates for the early strength loss caused by hydration delay, and the 7-day strength can reach more than 92% of the reference concrete, and the 28-day strength is flat or slightly increased.

[0031] 4. Durability improvement: The homogeneous microstructure and optimized pore structure effectively improve the impermeability and crack resistance of concrete, thereby enhancing the long-term durability.

[0032] 5. Good construction adaptability: Dry powder product, convenient for transportation, storage and automatic feeding at mixing station, seamless connection with existing concrete production process. DETAILED DESCRIPTION

[0033] The various exemplary embodiments of the present application will now be described in detail, which should not be considered as limiting the present application, but should be understood as a more detailed description of certain aspects, characteristics and embodiments of the present application.

[0034] It should be understood that the terms described in the present application are only for describing the specific embodiments, and are not used to limit the present application. In addition, for the numerical range in the present application, it should be understood that each intermediate value between the upper limit and the lower limit of the range is also specifically disclosed. Each smaller range between any stated value or intermediate value within the range, and any other stated value or intermediate value within the range, is also included in the present application. The upper limit and lower limit of these smaller ranges can be independently included or excluded from the range.

[0035] All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains unless otherwise specifically defined herein. Although preferred methods and materials are described herein, any method and material similar or equivalent to those described herein can be used in the practice or testing of the present application. All documents mentioned herein are incorporated by reference to disclose and describe in full the methods and / or materials which are described herein. In case of conflict between the content of the specification and that of any document incorporated herein by reference, the content of the specification prevails.

[0036] Many modifications and variations of the present application described in the specification are possible without departing from the scope or spirit of the application. Other implementations of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. The specification and examples given are exemplary only.

[0037] As used herein, the terms "comprises", "comprising", "includes", "including", "has", "having", and the like are open-ended terms that are intended to permit but not limit the inclusion of elements or the number of elements, as well as the possibility that one or more other elements can be added or otherwise included.

[0038] It should be noted that the present application does not describe in detail the conventional operation means in the art, and is not the focus of the present application.

[0039] The raw materials used in the following examples and comparative examples of the present application are as follows:

[0040] Cement: P·O 42.5 grade ordinary Portland cement.

[0041] Fly ash: Class II F fly ash.

[0042] Viscosity-reducing mineral: fly ash microbeads (FAM, specific surface area 3200 m 2 / kg), metakaolin (MK, 1250 mesh), silica fume (SF, specific surface area 21800 m 2 / kg), and ultra-fine limestone powder (ULS, 1000 mesh).

[0043] Surface modifier: polycarboxylate superplasticizer powder (PC-P) and silane coupling agent (KH-560).

[0044] Early inhibiting unit: calcium nitrate (CN), industrial grade.

[0045] Sustained regulating unit: maltodextrin (MD), with a DE (dextrose equivalent) value of 9;

[0046] Nanometer nucleating agent: nanometer silicon dioxide (nS, particle size 15-20 nm).

[0047] Air entraining / stable foam component: triterpenoid saponin (TS), solid powder.

[0048] Aggregate: Class II medium sand (river sand with fineness modulus of 2.8) and Class II gravel (5-25 mm continuous gradation limestone gravel) in accordance with the specification.

[0049] The other raw materials used are commercially available products, and the source of the commercially available products does not affect the technical effects of the present application.

[0050] Example 1

[0051] (1) Preparation of surface modified mineral viscosity reducer: fly ash beads, ultra-fine limestone powder and silica fume are mixed in a mass ratio of 55:30:15 as the basic viscosity reducing mineral (100 parts in total), 0.5 parts of polycarboxylic acid type water reducing agent powder (PC-P) is added, and the mixture is put into a laboratory planetary ball mill for co-milling for 30 minutes, and the outfeed is ready for use.

[0052] (3) Preparation of microstructure regulator: triterpenoid saponin (TS) and nano-silicon dioxide (nS) are mixed in a mass ratio of 1:2.

[0053] (4) Total mixing: 95 parts of the surface modified viscosity reducer obtained in step (1), 0.2 parts of the composite inhibition system obtained in step (2), and 6 parts of the microstructure regulator obtained in step (3) are put into a three-dimensional mixer and mixed for 45 minutes to obtain the composite viscosity reducing and temperature rise inhibiting material of the present application (denoted as S1).

[0054] Example 2

[0055] (1) The basic viscosity reducing mineral is a mixture of fly ash beads, ultra-fine limestone powder and metakaolin in a mass ratio of 60:25:15, and the surface modifier is 0.8 parts of silane coupling agent (KH-560), which is co-milled to prepare.

[0056] (2) The composite inhibition system is a mixture of calcium nitrate and calcium saccharide in a mass ratio of 1:1.5.

[0057] (3) The microstructure regulator is a mixture of hydrolyzed protein foam stabilizer and nano-calcium carbonate in a mass ratio of 1:3.

[0058] (4) Total mixing: 93 parts of the surface modified viscosity reducer, 0.2 parts of the composite inhibition system, and 4 parts of the microstructure regulator are mixed to obtain material S2.

[0059] Example 3

[0060] (1) The basic viscosity reducing mineral is a mixture of fly ash beads, ultra-fine limestone powder and silica fume in a mass ratio of 60:20:20, and the surface modifier is 1.0 parts of polycarboxylic acid type water reducing agent powder (PC-P), which is co-milled to prepare.

[0061] (2) The composite inhibitor system is sodium thiosulfate and calcium lignosulfonate compounded at a mass ratio of 1:0.8.

[0062] (3) The microstructure regulator is triterpenoid saponin and nano-alumina compounded at a mass ratio of 1:1.

[0063] (4) Total mixing: 94 parts of the surface-modified viscosity reducer, 0.2 parts of the composite inhibitor system, and 6 parts of the microstructure regulator are mixed to obtain material S3.

[0064] Comparative Example 1 (traditional viscosity reducer)

[0065] A physical mixture of fly ash cenospheres, ultra-fine limestone powder, and silica fume at a mass ratio of 55:30:15 is directly used without surface modification, and no inhibitor or regulator is added.

[0066] Comparative Example 2 (single inhibitor)

[0067] Malt dextrin is directly added to the reference concrete at a dosage of 0.2% of the mass of cementitious materials.

[0068] Comparative Example 3 (unmodified compound material)

[0069] The traditional viscosity reducer of Comparative Example 1 is used in an amount of 95 parts, and the same composite inhibitor system and microstructure regulator as in Example 1 are simply physically mixed in amounts of 0.2 parts and 6 parts, respectively.

[0070] Comparative Example 4 (compound material without nano-nucleating agent)

[0071] The formulation of Example 1 is used, but only triterpenoid saponin (TS) is used in the microstructure regulator, and no nano-silicon dioxide (nS) is added, i.e., the total amount of the microstructure regulator is 1 part (TS).

[0072] Performance test:

[0073] C40 concrete is prepared with a mix ratio (kg / m 3 ) of: cement: 315, fly ash: 63, inventive material: 42, water: 168, sand: 736, and stone: 1104. The inventive material replaces 10% of the cement by equal amount. The total cementitious material dosage (the sum of the mass of cement, fly ash, and inventive material) and water dosage are kept the same for all groups, and a liquid retarding polycarboxylate high-performance water reducer (solid content 19.4%) is uniformly added at a dosage of 1.0% of the total cementitious material mass.

[0074] The test results are shown in Table 1 and Table 2. Among them, the concrete slump, spread and inverted slump cylinder emptying time in Table 1 are tested according to the Standard Test Methods for Properties of Fresh Concrete (GB / T 50080-2016), the hydration heat is tested according to the Isothermal Calorimeter Method in the Standard Test Methods for Hydration Heat of Cement (GB / T 12959-2024) on the cementitious materials in the concrete, and the testing instrument is TAM Air eight-channel isothermal microcalorimeter; the concrete compressive strength in Table 2 is tested according to the Standard Test Methods for Mechanical Properties of Fresh Concrete (GB / T 50081-2019), and the adiabatic temperature rise is tested according to the Standard Test Methods for Properties of Fresh Concrete (GB / T 50080-2016).

[0075] Table 1 Test results of fresh concrete performance and hydration heat

[0076]

[0077] Table 2 Test results of mechanical properties of concrete and adiabatic temperature rise

[0078]

[0079] From Table 1, it can be seen that Comparative Example 1 confirms that the traditional mineral viscosity reducer can greatly improve the workability (spread of 580 mm, inverted slump cylinder emptying time of only 9 s), but significantly increases the early hydration heat (1d reaches 198 kJ / kg). Comparative Example 2 shows that a single inhibitor can strongly reduce the hydration heat, but severely sacrifices the workability (spread is only 430 mm, and inverted slump cylinder emptying time is as high as 28 s) and early strength. Examples 1-3 achieve optimal workability (spread is ≥585 mm, and inverted slump cylinder emptying time is ≤8.7 s) while the 1d and 3d hydration heats are significantly lower than those of Comparative Example 1, and even better than those of Comparative Example 2. This proves the synergy of surface modification and composite inhibitor system, achieving “viscosity reduction without temperature rise” or even “viscosity reduction and temperature reduction”.

[0080] As shown in Table 2, the final adiabatic temperature rise value (expressed by the highest temperature rise value reached by the concrete under adiabatic condition at the end of 14d test) of the concrete of Example 1 is greatly reduced from 48.1℃ of the baseline to 40.5℃, with a reduction of 7.6℃, and the time to reach 90% of the final adiabatic temperature rise (reflecting the speed of temperature rise entering the stable period) is delayed to 6.5 days, which is much better than Comparative Example 2 with a reduction of only 1.6℃ and Comparative Example 3 with a reduction of 2.9℃. Comparing Example 1 and Comparative Example 3, the final adiabatic temperature rise value (45.2℃) of the latter is higher than that of Example 1 due to the lack of surface modification of the viscosity reducer, and the strength of the latter is lower than that of Example 1. It is proved that surface modification is a necessary prerequisite for achieving deep temperature control and strength guarantee. Comparing Example 1 and Comparative Example 4, the 7d strength (31.7MPa) of the latter is significantly lower than that of Example 1 due to the lack of nano nucleating agent, and the adiabatic temperature rise (43.5℃) of the latter is higher than that of Example 1. It is proved that the nano nucleating agent is indispensable in compensating the strength and developing "physical insulation". The 28d strength of Examples 1-3 is flat or slightly higher than the baseline, completely eliminating the risk of strength reduction due to hydration delay.

[0081] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0082] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A composite material for reducing viscosity and inhibiting temperature rise, characterized in that, Based on the total mass of the material (100%), it consists of the following components: 91.5-97.9% surface-modified mineral viscosity reducer, 0.1-0.3% composite functional hydration temperature rise inhibition system, and 2-8.4% microstructure regulator; The surface-modified mineral viscosity reducer includes at least two of metakaolin, silica fume, ultrafine limestone powder, ultrafine fly ash, and fly ash microspheres; the composite functional hydration temperature rise inhibition system is composed of an early inhibition unit and a continuous regulation unit in a mass ratio of 1:0.5~2; the microstructure regulator is composed of an air-entraining / foam-stabilizing component and a nano-nucleating agent in a mass ratio of 1:1~4.

2. The composite viscosity-reducing and temperature rise-inhibiting material according to claim 1, characterized in that, Based on the total mass of the material, it consists of the following components: 92-96% surface-modified mineral viscosity reducer, 0.2% composite functional hydration temperature rise inhibition system, and 3-8% microstructure regulator.

3. The composite viscosity-reducing and temperature-rise-inhibiting material according to claim 2, characterized in that, Based on the total mass of the material, it consists of the following components: 93-95% surface-modified mineral viscosity reducer, 0.2% composite functional hydration temperature rise inhibition system, and 4-7% microstructure regulator.

4. The composite viscosity-reducing and temperature rise-inhibiting material according to claim 3, characterized in that, Based on the total mass of the material, it consists of the following components: 95% surface-modified mineral viscosity reducer, 0.2% composite functional hydration temperature rise inhibition system, and 6% microstructure regulator.

5. The composite viscosity-reducing and temperature-rise-inhibiting material according to any one of claims 1 to 4, characterized in that, The early inhibition unit includes calcium nitrate and / or sodium thiosulfate.

6. The composite viscosity-reducing and temperature rise-inhibiting material according to any one of claims 1 to 4, characterized in that, The continuous regulation unit includes one or more of maltodextrin, hydroxycarboxylate, calcium glycoside, and lignin sulfonate.

7. The composite viscosity-reducing and temperature-rise-inhibiting material according to any one of claims 1 to 4, characterized in that, The air-entraining / foam-stabilizing component includes one of triterpenoid saponins and hydrolyzed protein foam stabilizers.

8. The composite viscosity-reducing and temperature-rise-inhibiting material according to any one of claims 1 to 4, characterized in that, The nanonucleating agent includes one or more of nano-silica, nano-calcium carbonate, and nano-alumina.

9. The method for preparing the composite viscosity-reducing and temperature-rise-inhibiting material according to any one of claims 1 to 8, characterized in that, Includes the following steps: A predetermined ratio of surface-modified mineral viscosity reducer, composite functional hydration temperature rise inhibition system, and microstructure regulator is mixed until all components are uniformly dispersed to obtain the composite viscosity reducer and temperature rise inhibition material.

10. The application of the composite viscosity-reducing and temperature-inhibiting material according to any one of claims 1 to 8 in concrete, characterized in that, The concrete includes mass concrete.

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