A concrete conditioner and a method of making the same

Abstract

The application discloses a concrete regulator and a preparation method thereof, and belongs to the technical field of concrete admixtures. The regulator is composed of the following components in percentage by weight: hydrolysable polycarboxylic water reducing agent with amide groups 25-35%, composite thickening water-retaining material 8-12%, stability composite air entraining component 1.0-2.0%, slow-release composite retarding component 2-4%, internal curing and shrinkage compensating dual-functional anti-cracking component 5-8%, nanocrystalline core active mineral component 15-20%, and the balance of porous fly ash floating bead carriers treated by gamma-propyl trimethoxysilane hydrophobic treatment; the preparation method comprises the following steps: carrier pretreatment and loading, drying and master batch formation, nanometer component pre-dispersion, segmented gradient mixing, homogenization and curing, etc.; through the synergistic effect of the components, the application effectively solves the problems of fast loss of concrete slump, easy cracking, low early strength, poor adaptability to high-mixing admixtures, etc., and comprehensively improves the workability, mechanical properties and durability.

Description

Technical Field

[0001] This invention relates to the field of concrete admixtures, specifically to a concrete conditioner and its preparation method. Background Technology

[0002] Modern concrete engineering is developing towards high performance, long service life, and green technology, placing higher demands on the workability, mechanical properties, and durability of concrete. Although polycarboxylate superplasticizers have become a core component in the preparation of high-performance concrete, they still face many challenges in practical applications.

[0003] Conventional polycarboxylate superplasticizers exhibit rapid decay in dispersion over time in high-temperature, high-alkalinity cement environments, leading to excessively rapid slump loss in concrete and impacting construction quality and efficiency, especially during long-distance transportation and construction in hot seasons.

[0004] To achieve high fluidity, high dosages of water-reducing agents are often required, but this can easily lead to a decrease in the cohesiveness of concrete, resulting in bleeding and aggregate segregation. On the other hand, adding thickeners may excessively increase viscosity, which is detrimental to pumping and casting.

[0005] Early plastic shrinkage and drying shrinkage in concrete are the main causes of cracking, severely affecting structural durability. Traditional single expansive agents and fibers are insufficient to comprehensively and effectively suppress cracks caused by multiple factors. With the development of green building materials, replacing cement with large amounts of industrial waste has become a trend. However, these active mineral admixtures often have high water requirements and low early activity, easily leading to poor concrete cohesion, bleeding, and slow early strength development.

[0006] In the existing technology, although there are various single-function admixtures (such as retarders, air-entraining agents, water-retaining agents, etc.), simply combining them often results in poor effects due to the interaction between components, or even produces side effects, making it difficult to achieve synergistic optimization of slump maintenance, viscosity adjustment, crack resistance enhancement and durability improvement.

[0007] Therefore, developing a high-performance comprehensive regulator that can systematically solve the above problems and achieve synergistic effects among its functional components is a technical challenge that urgently needs to be addressed in this field. Summary of the Invention

[0008] The primary objective of this invention is to overcome the shortcomings of existing technologies and provide a concrete conditioner. This conditioner, through the precise design and synergistic effect of its functional components, can simultaneously and significantly improve the workability retention, crack resistance, mechanical properties, and compatibility with high-volume admixtures of concrete.

[0009] Another objective of this invention is to provide a method for preparing a concrete conditioner. This method features a scientifically designed process that ensures the uniform dispersion and stability of all components, especially liquid, solid, and micro / nano components, thereby guaranteeing the reliability and reproducibility of the final product's performance.

[0010] To achieve the above objectives, the present invention adopts the following technical solution:

[0011] A concrete conditioner, comprising the following components by weight percentage:

[0012] Hydrolyzable polycarboxylate superplasticizer with amide groups: 25%-35%, wherein the amide groups are configured to hydrolyze in the alkaline environment of concrete to generate carboxyl groups in situ, thereby providing enhanced dispersing power over time. CN107868187A, a method for preparing a low-heat-of-hydration polycarboxylate superplasticizer, provides a detailed description of the preparation method for a polycarboxylate superplasticizer with amide groups.

[0013] Composite thickening and water-retaining material: 8%-12%, wherein the composite thickening and water-retaining material comprises hydrophobically modified hydroxyethyl cellulose with a viscosity of 40,000-60,000 mPa·s (2% aqueous solution, 20℃);

[0014] Stable composite air-entraining component: 1.0%-2.0%;

[0015] Slow-release compound retarder component: 2%-4%;

[0016] Dual-function crack-resistant component for internal protection and shrinkage compensation: 5%-8%;

[0017] Active mineral components in nanocrystal nuclei: 15%-20%;

[0018] Porous fly ash cenosphere carrier treated with γ-(2,3-epoxypropoxy)propyltrimethoxysilane hydrophobication: balance, used to make up the sum of the weight percentages of the components to 100%;

[0019] The particle size range of the porous fly ash cenosphere carrier is 5μm-150μm.

[0020] Preferably, the hydrolyzable polycarboxylate superplasticizer with amide groups is a copolymer with a ternary block structure of long side chains, short side chains, and amide groups, with a weight-average molecular weight of 40,000-50,000, and the molar content of amide groups accounts for 5%-15% of the total molar amount of monomers in the superplasticizer.

[0021] Preferably, the composite thickening and water-retaining material is composed of hydrophobic modified hydroxyethyl cellulose and vinyl ether in a weight ratio of (3:1) to (5:1).

[0022] Preferably, the stable composite air-entraining component is composed of triterpenoid saponins and sodium lauroylamphoacetate in a weight ratio of (4:1) to (6:1).

[0023] Preferably, the slow-release composite slow-coagulation component is composed of sodium gluconate and phosphate microcapsules encapsulated with a pH-sensitive polymer in a weight ratio of (1:1) to (2:1); the pH-sensitive polymer is a copolymer obtained by copolymerizing ethyl cellulose and acrylic acid in a weight ratio of (7:3) to (6:4).

[0024] Preferably, the dual-function anti-cracking component for internal protection and shrinkage compensation is composed of lightly calcined magnesium oxide with a particle size of 1-5 μm and cross-linked sodium polyacrylate superabsorbent resin in a weight ratio of (7:1)-(9:1); the superabsorbent resin has a saturation absorption ratio of 80-150 times in deionized water.

[0025] Preferably, the active mineral component of the nanocrystal nucleus is a mixture of nano-silica modified with γ-aminopropyltriethoxysilane and synthetic ettringite in a weight ratio of 1:1; the nano-silica has a particle size of 10-30 nm, a specific surface area ≥200 m² / g, and a grafting rate of γ-aminopropyltriethoxysilane on its surface of 8%-15%.

[0026] A method for preparing a concrete conditioner includes the following steps:

[0027] S1: Carrier Pretreatment and Loading: The porous fly ash cenosphere carrier, treated with γ-(2,3-epoxypropoxy)propyltrimethoxysilane hydrophobication according to the formulation, is put into a high-speed mixer. Under the conditions of stirring and jacket cooling temperature control ≤40℃, the hydrolyzable polycarboxylate superplasticizer with amide groups according to the formulation is uniformly sprayed onto the carrier surface through an atomizing nozzle with a pressure of 0.2-0.4 MPa. The solid content of the hydrolyzable polycarboxylate superplasticizer with amide groups is 40%-50%, and its formulation amount is calculated to ensure that the solid content of polycarboxylate superplasticizer in the final product accounts for 25%-35% of the total weight of the regulator.

[0028] S2: Drying and Masterbatch Formation: The wet base masterbatch obtained in step S1 is transferred to a fluidized bed dryer and dried at 60-80℃ for 20-40 minutes to remove moisture and form a dry, free-flowing base masterbatch.

[0029] S3: Pre-dispersion of nano-components: Pre-mix 50% of the nano-crystal active mineral component with an equal weight of composite thickening and water-retaining material in a low-speed mixer for 5-10 minutes to improve the dispersibility of nanoparticles.

[0030] S4: Piecewise gradient mixing:

[0031] First stage of mixing: The base masterbatch obtained in step S2, the pre-dispersed nanocomposite material obtained in step S3, and the remaining composite thickening and water-retaining material are put into a mixer and mixed at 150-250 rpm for 8-12 minutes;

[0032] Two-stage mixing: Add the entire amount of the stable composite air-entraining component, the slow-release composite retarding component, the internal curing and shrinkage compensation dual-function anti-cracking component, and the remaining nanocrystalline active mineral component to the material after the first stage mixing. Increase the speed of the mixer to 350-450 rpm and mix for 15-20 minutes.

[0033] S5: Homogenization and maturation: Reduce the mixer speed to 50-100 rpm and continue mixing for 30-60 minutes, pausing for 1 minute every 5 minutes of operation to obtain the concrete conditioner.

[0034] The beneficial effects of this experiment are:

[0035] By employing a synergistic system of hydrolyzable polycarboxylate superplasticizer with amide groups and slow-release composite retarder, the problems of excessively rapid slump loss and viscosity control imbalance were solved, achieving precise maintenance of workability for an ultra-long period of time.

[0036] By combining a dual-function anti-cracking component with internal curing and shrinkage compensation, a stable composite air-entraining component, and a nanocrystalline nucleus active mineral component, the problems of early cracking and insufficient durability are solved, and a multi-path, full-process anti-cracking and toughening system is constructed.

[0037] By introducing surface-modified and grafting-rate-controllable nanocrystalline nuclei active mineral components, the problems of slow early strength development and loose microstructure were solved, achieving a simultaneous leap in strength and durability.

[0038] By using a composite thickening and water-retaining material with a specific viscosity range and a porous fly ash cenosphere carrier treated with γ-(2,3-epoxypropoxy)propyltrimethoxysilane hydrophobication, the problem of poor compatibility with high-dosage admixtures was solved, and the homogeneity and workability of concrete were significantly improved.

[0039] By employing a core process that combines carrier loading to form masterbatch with segmented gradient mixing, the problems of poor performance and uneven product uniformity caused by simple compounding of various additives are solved, providing a preparation method that can ensure component stability and functional synergy.

[0040] This invention is not a simple stacking of multiple functions, but rather achieves efficient synergy between various functional units in time and space through the molecular structure design, functional compounding, and precise control of the preparation process of each component, ultimately achieving comprehensive and systematic optimization of the workability, mechanical properties, and durability of concrete. Detailed Implementation

[0041] Example 1: Preparation of Concrete Conditioner

[0042] Concrete conditioner is composed of the following components by weight percentage:

[0043] Hydrolyzable polycarboxylate superplasticizer with amide groups: 30%;

[0044] Composite thickening and water-retaining material: 10.0%;

[0045] Stable composite air-entraining component: 1.5%;

[0046] Slow-release compound retarder component: 3.0%;

[0047] Dual-function crack-resistant component for internal protection and shrinkage compensation: 6.0%;

[0048] Active mineral component of nanocrystal nuclei: 18.0%;

[0049] Porous fly ash cenosphere carrier treated with γ-(2,3-epoxypropoxy)propyltrimethoxysilane hydrophobication: 31.5%;

[0050] The concrete conditioner of this embodiment was prepared according to the formula shown in Table 1 and the concrete conditioner preparation method of the present invention.

[0051] Table 1: Concrete Conditioner Formulation (by weight) for Example 1

[0052] Component Name Specifications / Instructions content(%) Hydrolyzable polycarboxylate superplasticizer with amide groups Aqueous formulation with a weight average molecular weight of 45,000, amide group content of 10 mol%, and solid content of 45%. 30 Composite thickening and water-retaining materials HMEHC (viscosity 50,000 mPa·s): Warm roller adhesive = 4:1 10.0 Stable composite air-entraining components Triterpenoid saponins : Sodium lauroamphoacetate = 5 : 1 1.5 Slow-release composite retarder Sodium gluconate : phosphate microcapsules = 1.5 : 1 3.0 Internal protection and shrinkage compensation dual-function crack-resistant component Lightly calcined magnesium oxide (d50=3μm) : SAP (liquid absorption ratio 120) = 8 : 1 6.0 Nanocrystalline nucleus active mineral components <![CDATA[Modified nano-SiO2 (grafting rate 12%): Ettringite = 1:1]]> 18.0 Porous fly ash cenosphere carriers treated with γ-(2,3-epoxypropoxy)propyltrimethoxysilane hydrophobication Particles treated with KH-560 have a diameter of 5-150 μm. Balance (31.5) total 100.0

[0053] Note: 30.0% is the effective ingredient content after folding. The actual amount of water-based agent with 45% solid content added is 66.7 parts. The calculation ensures that the solid water-reducing agent content in the final product is 30%.

[0054] The preparation method is as follows:

[0055] S1: 31.5 parts of porous fly ash cenosphere carrier treated with γ-(2,3-epoxypropoxy)propyltrimethoxysilane hydrophobication were added to a high-speed mixer, and stirring (200 rpm) and cooling water (temperature controlled ≤35℃) were started. 66.7 parts of the hydrolyzable polycarboxylate superplasticizer with amide groups (solid content 45%) were uniformly sprayed onto the carrier surface through an atomizing nozzle (pressure 0.3 MPa). After spraying, the mixture was mixed for another 5 minutes to obtain wet-based masterbatch.

[0056] S2: Transfer the wet masterbatch obtained in S1 to a fluidized bed dryer and dry it at 70°C for 30 minutes to remove moisture and form a dry, free-flowing base masterbatch.

[0057] S3: Premix 9.0 parts (50% of the total formula) of nanocrystalline active mineral components with 9.0 parts of composite thickening and water-retaining material in a low-speed mixer for 8 minutes to obtain pre-dispersed nanocomposite material.

[0058] S4: Segmented gradient blending

[0059] First stage of mixing: The base masterbatch obtained in S2, the pre-dispersed nanocomposite material obtained in S3, and the remaining 1.0 part of composite thickening and water-retaining material are put into the mixer and mixed at 200 rpm for 10 minutes.

[0060] Second-stage mixing: Add 1.5 parts of stable composite air-entraining component, 3.0 parts of slow-release composite retarder, 6.0 parts of internal curing and shrinkage compensation dual-function crack-resistant component, and the remaining 9.0 parts of nanocrystalline nucleus active mineral component to the material after the first-stage mixing. Increase the mixer speed to 400 rpm and mix for 18 minutes.

[0061] S5: Reduce the mixer speed to 80 rpm and continue mixing for 45 minutes, pausing for 1 minute every 5 minutes. Discharge the mixture to obtain a gray powdery concrete modifier.

[0062] Comparative Example 1

[0063] A commercially available brand of polycarboxylate-based high-performance water-reducing agent (powder) was used to perform a simple physical mixture with hydroxypropyl methylcellulose, an air-entraining agent, and sodium gluconate. The total composition was approximately the same as in Example 1.

[0064] Performance testing experiment

[0065] In conventional concrete, the admixture content is typically low, between 15% and 20%. This results in low early strength due to the low hydration activity of fly ash, leading to slow strength development at 3 and 7 days. Poor cohesion and easy bleeding are also issues. The different particle shape of fly ash compared to cement contributes to insufficient paste cohesion, causing aggregate separation and surface bleeding. The competitive water absorption between the admixture and cement further exacerbates slump loss.

[0066] The verification objective of this embodiment is:

[0067] Tests conducted under these high dosage conditions demonstrate that the concrete conditioner of this invention can effectively overcome the aforementioned problems.

[0068] 1. Concrete test mix proportion

[0069] Cementitious materials: 70% P·O 42.5 cement, 30% Grade II fly ash (simulating high admixture conditions).

[0070] Aggregate: The weight ratio of medium sand to gravel is 2.3:3.2.

[0071] Water-cement ratio: The weight ratio of water to cementitious material is 0.35.

[0072] Admixtures: 1.0% of the total weight of the cementitious materials of the products in Example 1 and Comparative Example 1, respectively.

[0073] Baseline group: No additives were added, and the initial slump was roughly equivalent to that of the test group by adjusting the amount of water.

[0074] 2. Test Results

[0075] Table 2: Concrete Performance Test Results

[0076] Test Project benchmark group Comparative Example 1 Example 1 Initial slump (mm) 215 225 218 90-minute slump (mm) It has solidified 165 205 90-minute slump loss rate (%) - 26.5 6.0 <![CDATA[Early cracking test (total cracking area, mm 2 / m 2 )]]> 1250 480 210 Crack area reduction rate (vs. baseline) (%) - 61.6 83.2 3D compressive strength (MPa) 18.5 25.1 29.8 3D intensity growth rate (vs. baseline) (%) - 35.7 61.1 <![CDATA[28d Chloride ion diffusion coefficient (×10 -12 m 2 / s)]]> 8.5 7.1 5.9 Reduction rate of diffusion coefficient (vs. baseline) (%) - 16.5 30.6 Appearance Mild oozing There is virtually no oozing. It exhibits no bleeding, good cohesiveness, and high gloss.

[0077] Results analysis:

[0078] As shown in Table 2, compared with Comparative Example 1 (simple physical mixing), the product of Embodiment 1 of the present invention exhibits significant advantages:

[0079] Workability retention: The slump loss rate after 90 minutes was only 6.0%, far lower than the 26.7% of Comparative Example 1, proving the effectiveness of the time-controlled hydrolysis water reduction and slow-release sludge synergistic mechanism of the present invention.

[0080] Crack resistance: The crack area reduction rate reached 83.2%, which is significantly better than the 61.6% of Comparative Example 1, demonstrating the superiority of the multi-path crack resistance system.

[0081] Mechanical properties and durability: The 3-day strength growth rate and the 28-day chloride ion diffusion coefficient reduction rate were significantly higher than those of Comparative Example 1, indicating that the nanocrystal nucleus effect of the present invention has a more prominent effect on the optimization of the microstructure.

[0082] Adaptability: Under high fly ash content (30%), the concrete prepared in Example 1 has good cohesiveness, no bleeding, and better condition.

[0083] Example 2

[0084] The content of each component was adjusted to be within the range claimed in this invention. The specific formulation is shown in Table 3.

[0085] Concrete conditioner is composed of the following components by weight percentage:

[0086] Hydrolyzable polycarboxylate superplasticizers with amide groups: 25.0%;

[0087] Composite thickening and water-retaining material: 8.0%;

[0088] Stable composite air-entraining component: 1.0%;

[0089] Slow-release compound retarder component: 2.0%;

[0090] Dual-function crack-resistant component for internal protection and shrinkage compensation: 5.0%;

[0091] Nanocrystalline nucleus active mineral component: 15.0%;

[0092] Porous fly ash cenosphere carrier treated with γ-(2,3-epoxypropoxy)propyltrimethoxysilane hydrophobication: 44.0%;

[0093] The concrete conditioner of this embodiment was prepared according to the formula shown in Table 3 and the concrete conditioner preparation method of the present invention.

[0094] Table 3: Concrete Conditioner Formulation (by weight) for Example 2

[0095] Component Name Example 2 (%) Hydrolyzable polycarboxylate superplasticizer with amide groups 25.0 Composite thickening and water-retaining materials 8.0 Stable composite air-entraining components 1.0 Slow-release composite retarder 2.0 Internal protection and shrinkage compensation dual-function crack-resistant component 5.0 Nanocrystalline nucleus active mineral components 15.0 Porous fly ash cenosphere carriers treated with γ-(2,3-epoxypropoxy)propyltrimethoxysilane hydrophobication Balance (44.0) total 100.0

[0096] The preparation method is the same as in Example 1:

[0097] S1: 44.0 parts of porous fly ash cenosphere carrier treated with γ-(2,3-epoxypropoxy)propyltrimethoxysilane hydrophobication were put into a high-speed mixer. Under the conditions of stirring and cooling temperature control ≤35℃, the corresponding amount of polycarboxylate superplasticizer was evenly sprayed onto the surface of the carrier through an atomizing nozzle to obtain wet-based masterbatch.

[0098] S2: The wet masterbatch obtained in S1 is dried in a fluidized bed dryer at 65°C for 25 minutes to form the base masterbatch.

[0099] S3: Premix 7.5 parts (50% of the total formula) of nanocrystalline active mineral components with 7.5 parts of composite thickening and water-retaining material for 7 minutes.

[0100] S4: Segmented gradient blending

[0101] First stage of mixing: Mix the base masterbatch, pre-dispersed nanocomposite material and the remaining 0.5 parts of composite thickening and water-retaining material at 180 rpm for 10 minutes.

[0102] Second stage mixing: Add all remaining components and mix at 380 rpm for 17 minutes.

[0103] S5: Reduce the speed to 70 rpm, stir intermittently for 40 minutes, and then discharge.

[0104] Results analysis: The concrete performance of the product of Example 2 was better than that of Comparative Example 1, and all indicators met the effects claimed by the present invention.

[0105] Example 3

[0106] The content of each component was adjusted to be within the range claimed in this invention. The specific formulation is shown in Table 4.

[0107] Concrete conditioner is composed of the following components by weight percentage:

[0108] Hydrolyzable polycarboxylate superplasticizers with amide groups: 35.0%;

[0109] Composite thickening and water-retaining material: 12.0%;

[0110] Stable composite air-entraining component: 2.0%;

[0111] Slow-release compound retarder component: 4.0%;

[0112] Dual-function crack-resistant component for internal protection and shrinkage compensation: 8.0%;

[0113] Nanocrystalline nucleus active mineral component: 20.0%;

[0114] Porous fly ash cenosphere carrier treated with γ-(2,3-epoxypropoxy)propyltrimethoxysilane hydrophobication: 19.0%;

[0115] The concrete conditioner of this embodiment was prepared according to the formula shown in Table 4 and the concrete conditioner preparation method of the present invention.

[0116] Table 4: Concrete Conditioner Formulation (by weight) for Example 3

[0117] Component Name Example 3 (%) Hydrolyzable polycarboxylate superplasticizer with amide groups 35.0 Composite thickening and water-retaining materials 12.0 Stable composite air-entraining components 2.0 Slow-release composite retarder 4.0 Internal protection and shrinkage compensation dual-function crack-resistant component 8.0 Nanocrystalline nucleus active mineral components 20.0 Porous fly ash cenosphere carriers treated with γ-(2,3-epoxypropoxy)propyltrimethoxysilane hydrophobication Balance (19.0) total 100.0

[0118] The preparation method is as follows:

[0119] S1: 19.0 parts of porous fly ash cenosphere carrier treated with γ-(2,3-epoxypropoxy)propyltrimethoxysilane hydrophobication were put into a high-speed mixer. Under the conditions of stirring and cooling temperature control ≤35℃, the corresponding amount of polycarboxylate superplasticizer was evenly sprayed onto the surface of the carrier through an atomizing nozzle to obtain wet-based masterbatch.

[0120] S2: The wet masterbatch obtained in S1 is dried in a fluidized bed dryer at 75°C for 35 minutes to form the base masterbatch.

[0121] S3: Premix 10.0 parts (50% of the total formula) of nanocrystalline active mineral components with 10.0 parts of composite thickening and water-retaining material for 9 minutes.

[0122] S4: Segmented gradient blending

[0123] First stage of mixing: Mix the base masterbatch, pre-dispersed nanocomposite material and the remaining 2.0 parts of composite thickening and water-retaining material at 220 rpm for 11 minutes.

[0124] Second stage mixing: Add all remaining components and mix at 420 rpm for 19 minutes.

[0125] S5: Reduce the speed to 90 rpm, stir intermittently for 50 minutes, and then discharge the material.

[0126] Results Analysis: The concrete performance of the product of Example 3 was better than that of Comparative Example 1, and all indicators met the effects claimed by the present invention, proving the effectiveness and feasibility of the formulation within the scope of the claims of the present invention.

[0127] In summary, the concrete conditioner and its preparation method of the present invention, through careful component design and process control, successfully solves several problems in the prior art and has broad prospects for industrial application.

Claims

1. A concrete conditioner, characterized in that, Composed of the following components by weight percentage: Hydrolyzable polycarboxylate superplasticizers with amide groups: 25%-35%; Composite thickening and water-retaining material: 8%-12%, wherein the composite thickening and water-retaining material is compounded from hydrophobically modified hydroxyethyl cellulose and acetone in a weight ratio of 3:1 to 5:1; the viscosity of the hydrophobically modified hydroxyethyl cellulose is 40000-60000 mPa·s; Stable composite air-entraining component: 1.0%-2.0%, wherein the stable composite air-entraining component is composed of triterpenoid saponins and sodium lauroylamphoacetate in a weight ratio of 4:1 to 6:1; Slow-release composite slow-release component: 2%-4%, wherein the slow-release composite slow-release component is composed of sodium gluconate and phosphate microcapsules encapsulated with pH-sensitive polymer in a weight ratio of 1:1 to 2:1; wherein the pH-sensitive polymer is a copolymer obtained by copolymerizing ethyl cellulose and acrylic acid in a weight ratio of 7:3 to 6:

4. Internal curing and shrinkage compensation dual-function crack-resistant component: 5%-8%, wherein the internal curing and shrinkage compensation dual-function crack-resistant component is composed of lightly calcined magnesium oxide with a particle size of 1-5μm and cross-linked sodium polyacrylate superabsorbent resin in a weight ratio of 7:1 to 9:1; the test medium for the superabsorbent resin is deionized water; Nanocrystalline nucleus active mineral component: 15%-20%, wherein the nanocrystalline nucleus active mineral component is a mixture of nano-silica modified with γ-aminopropyltriethoxysilane and synthetic ettringite in a weight ratio of 1:1; The nano-silica has a particle size of 10-30 nm, a specific surface area of ​​≥200 m² / g, and a grafting rate of γ-aminopropyltriethoxysilane on its surface of 8%-15%. Porous fly ash cenosphere carrier treated with γ-propyltrimethoxysilane hydrophobication: balance, used to make up the sum of the weight percentages of the components to 100%; The particle size range of the porous fly ash cenosphere carrier is 5μm-150μm.

2. The concrete conditioner according to claim 1, characterized in that, The hydrolyzable polycarboxylate superplasticizer with amide groups is a copolymer with a ternary block structure of long side chains, short side chains, and amide groups, with a weight-average molecular weight of 40,000-50,000, and the molar content of amide groups accounts for 5%-15% of the total molar amount of monomers in the superplasticizer.

3. A method for preparing the concrete conditioner as described in any one of claims 1 to 2, characterized in that, Includes the following steps: S1: Carrier Pretreatment and Loading: The porous fly ash cenosphere carrier treated with γ-propyltrimethoxysilane hydrophobication in the formulation amount is put into a high-speed mixer. Under the conditions of stirring and jacket cooling temperature control ≤40℃, the hydrolyzable polycarboxylate superplasticizer with amide groups in the formulation amount is uniformly sprayed onto the carrier surface through an atomizing nozzle with a pressure of 0.2-0.4MPa. The solid content of the hydrolyzable polycarboxylate superplasticizer with amide groups is 40%-50%, and its formulation amount is calculated to ensure that the solid content of polycarboxylate superplasticizer in the final product accounts for 25%-35% of the total weight of the regulator. S2: Drying and Masterbatch Formation: The wet masterbatch obtained in step S1 is transferred to a fluidized bed dryer and dried at 60-80℃ for 20-40 minutes to remove moisture and form a dry, free-flowing basic masterbatch. S3: Pre-dispersion of nano-components: Pre-mix 50% of the nano-crystal active mineral component with an equal weight of composite thickening and water-retaining material in a low-speed mixer for 5-10 minutes to improve the dispersibility of nanoparticles. S4: Piecewise gradient blending: First stage of mixing: The base masterbatch obtained in step S2, the pre-dispersed nanocomposite material obtained in step S3, and the remaining composite thickening and water-retaining material are put into a mixer and mixed at a speed of 150-250 rpm for 8-12 minutes. Two-stage mixing: Add the entire amount of the stable composite air-entraining component, the slow-release composite retarding component, the internal curing and shrinkage compensation dual-function anti-cracking component, and the remaining nanocrystalline active mineral component to the material after the first stage mixing. Increase the speed of the mixer to 350-450 rpm and mix for 15-20 minutes. S5: Homogenization and maturation: Reduce the mixer speed to 50-100 rpm and continue mixing for 30-60 minutes, pausing for 1 minute every 5 minutes of operation to obtain the concrete conditioner.