Formula and preparation process of cement-based active siliceous bionic self-repairing material

Abstract

The invention relates to a formula and a preparation process of a cement-based active siliceous bionic self-repairing material in the technical field of bionic self-repairing of concrete. The formula comprises a siliceous base material, superfine quartz sand, an active grouping bag, an expansion grouping bag, a tackifying and water-retaining grouping bag, a mud-inhibiting grouping bag and a flowable grouping bag, the preparation process comprises the following steps: S1, preparing an active group packet; s2, preparing a hydrophobic group bag; s3, preparing a coagulation accelerating group bag; s4, preparing an expansion group package; s5, preparing a tackifying and water retention group bag; s6, preparing a mud inhibition group bag; s7, preparing a flowable group packet; s8, mixing and stirring; the self-repairing agent is doped in concrete or mortar to realize self-repairing of microcracks of a concrete structure, the anti-cracking and repairing purposes are achieved by enhancing the immunity of the concrete, and compared with a traditional mode, the self-repairing agent has the advantages that the self-repairing capability of the concrete is enhanced, the self-repairing effect of the concrete is improved, and the service life of the concrete is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of concrete bionic self-repairing technology, and in particular to a formula and preparation process of a cement-based active siliceous bionic self-repairing material. Background Art

[0002] Concrete pouring refers to the process of pouring concrete into a mold until it is plasticized. In civil engineering projects, concrete and other materials are poured into a mold to form a predetermined shape. When pouring concrete, the free height of the concrete should not exceed 2m. When it exceeds 3m, corresponding measures should be taken.

[0003] Active siliceous self-healing materials imitate the healing function of biological tissue damage, forming an intelligent self-healing system inside the concrete. When cracks or damage appear in the concrete material, the repair reaction is automatically triggered under the action of water, making it densely healed.

[0004] Concrete cracks have long been considered the "cancer" of concrete. With the recent decline in aggregate quality, concrete cracks have become increasingly common and severe, seriously threatening the lifespan of buildings and becoming a major shortcoming in the construction industry. Traditional crack repair methods use grouting materials such as epoxy and polyurethane. However, the limited durability of these repair materials often leads to a cycle of repeated repairs, which in turn increases maintenance costs. Biomimetic self-healing grouting materials for concrete cracks, developed based on active siliceous self-healing materials, can be widely used to address leaks caused by cracks in basements, roofs, tunnels, and other structures. Currently, conventional concrete grouting materials merely fill concrete cracks, effectively blocking water flow, but concrete defects remain. As the grouting materials fail, concrete deteriorates, leading to reduced performance and a shortened service life. A key challenge in leak repair and restoration is how to quickly, efficiently, and cost-effectively address leaks while ensuring they last the same length as the concrete structure.

[0005] Cracks are prone to occur in concrete after pouring due to various reasons. As the cracks develop, the performance of the concrete decreases and its service life is shortened. New materials are urgently needed to change the current situation. In response to the above-mentioned problems, the present invention provides a self-repairing material for concrete with internal active siliceous materials. The active siliceous self-repairing material and the self-repairing concrete can inhibit cracking caused by temperature shrinkage of concrete, and even after cracking, they can self-repair cracks within 0.6mm, thereby improving the waterproof and anti-seepage properties of the concrete, as well as the seawater erosion resistance and durability, thereby extending the service life of the concrete. Summary of the Invention

[0006] The purpose of the present invention is to solve the above defects and provide a formulation and preparation process of a cement-based active siliceous bionic self-repairing material.

[0007] The object of the present invention is achieved in the following ways:

[0008] A formula of a cement-based active siliceous biomimetic self-repairing material, wherein the formula is prepared according to the following parts by mass:

[0009] 30-60 parts of siliceous base materials, 10-20 parts of ultrafine quartz sand, 10-30 parts of active group package, 10-20 parts of expansion group package, 1-5 parts of viscosity-increasing and water-retaining group package, 1-3 parts of mud-suppressing group package, and 1-3 parts of fluidity group package.

[0010] A preparation process of a cement-based active siliceous biomimetic self-repairing material, comprising the following steps:

[0011] S1, preparing an active group package; grinding the active material to 800 mesh, taking 1 part of the active material and mixing it with 1 part of the nano-scale open-porous material, adding a small amount of graphene, and thoroughly mixing and stirring in a magnetic stirrer at 1000 rpm for 15 minutes to form a sustained-release active group package;

[0012] S2, preparing a hydrophobic group bag; grouping the hydrophobic groups, fully grinding the hydrophobic groups to 800 mesh, adding them to a mixer, and stirring them evenly with a stirrer at high speed to obtain a hydrophobic group bag;

[0013] S3, preparing a coagulant group package; grouping the coagulant components, fully grinding the coagulant components to 800 mesh, adding them to a mixer, mixing them and stirring them at high speed to obtain a coagulant group package;

[0014] S4, preparing an expanded group bag; grouping the expanded ingredients, fully grinding the expanded ingredients to 800 mesh, adding them to a mixer and mixing them at high speed to obtain an expanded group bag;

[0015] S5, preparing a thickening and water-retaining group bag; grouping the thickening and water-retaining ingredients, fully grinding the thickening and water-retaining ingredients to 800 mesh, adding them to a mixer, mixing them and stirring them at high speed to obtain a thickening and water-retaining group bag;

[0016] S6, preparing mud-inhibiting group packages; grouping the mud-inhibiting ingredients, fully grinding the mud-inhibiting ingredients to 800 mesh, adding them to a mixer, mixing them and stirring them at high speed to obtain a mud-inhibiting group package;

[0017] S7, preparing a fluidity group package; grouping the components that increase the fluidity of the slurry, fully grinding the components that increase the fluidity of the slurry to 800 mesh, adding them to a mixer, mixing and stirring at high speed to obtain a fluidity group package;

[0018] S8, mixing and stirring; after mixing the siliceous base material and ultrafine quartz sand, add the active group package, the expansion group package, the viscosity-enhancing and water-retaining group package and the mud-inhibiting group package into the stirrer in turn and mix and stir thoroughly for 15 minutes; then add the hydrophobic group package and stir evenly, then add the coagulant group package and stir evenly, finally add the auxiliary agent package and a small amount of graphene and stir thoroughly, and put the evenly stirred materials into the silo for packaging.

[0019] Furthermore, in S1, the active material comprises one or a combination of two or more of active silicon dioxide, active aluminum oxide, active lignin and active magnesium oxide.

[0020] Furthermore, in S2, the hydrophobic group comprises a combination of two or more of polysiloxane dry powder hydrophobic agent, potassium methyl silicate, sodium methyl silicate and calcium stearate.

[0021] Furthermore, in S3, the accelerating setting component comprises one or a combination of two or more of calcium formate, aluminate cement, sulphoaluminate cement and anhydrous gypsum.

[0022] Furthermore, in S4, the expansion component comprises 1 part of ultrafine low-activity magnesium oxide and 2 parts of ultrafine high-activity magnesium oxide.

[0023] Furthermore, in S5, the viscosity-increasing and water-retaining component includes a combination of two or more of hydroxypropyl methylcellulose, methylcellulose, calcium chloride, and diatomaceous earth.

[0024] The beneficial effects of the present invention are as follows: the present invention realizes self-repair of micro-cracks in concrete structure by adding it into concrete or mortar, and achieves the purpose of crack resistance and repair by enhancing the immunity of concrete itself. Compared with traditional methods, the present invention adds siliceous base materials, ultrafine quartz sand, active group packages, expansion group packages, viscosity-increasing and water-retaining group packages, mud-inhibiting group packages, hydrophobic group packages, coagulant group packages, additive packages and graphene to enhance the self-repairing ability of concrete, thereby improving the self-repair effect and service life of concrete.

[0025] Active siliceous self-healing materials are added to concrete or mortar at a dosage of 0.5%-5% of the cement content. This can effectively inhibit the generation of concrete cracks, enhance concrete impermeability and strength, reduce the impact of unstable aggregate quality on concrete, and enable concrete to have the ability to self-repair micro-cracks.

[0026] The present invention can realize self-waterproofing of concrete structures, reduce the occurrence of concrete cracks, and even if cracks or fissures occur, they can automatically heal under the action of water, thereby achieving a long-lasting waterproofing effect of the concrete body or mortar body itself, greatly improving the durability of the structure, and improving economic and social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Schematic diagram of a method flow in an embodiment of the present invention;

[0028] Figure 2 Reference diagram of the cracks measured on site in Example 2 of the present invention

[0029] Figure 3 This is a diagram showing the actual effect of crack self-repair measured on site according to the second embodiment of the present invention;

[0030] Figure 4 Another reference diagram of the cracks measured on site in Example 2 of the present invention

[0031] Figure 5 for Figure 4 A partial enlarged schematic diagram of the cracks measured on site;

[0032] Figure 6 This is another actual effect diagram of crack self-repair measured on site according to the second embodiment of the present invention. DETAILED DESCRIPTION

[0033] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0034] Example 1:

[0035] Reference Figure 1 , which specifically implements a formula of a cement-based active silica biomimetic self-repairing material, the formula is prepared according to the following mass parts:

[0036] 40 parts of siliceous base materials, 15 parts of ultrafine quartz sand, 20 parts of active group packages, 12 parts of expansion group packages, 3 parts of viscosity-enhancing and water-retaining group packages, 2 parts of mud-suppressing group packages, and 3 parts of fluidity group packages.

[0037] A preparation process of a cement-based active siliceous biomimetic self-repairing material, comprising the following steps:

[0038] S1, preparing an active group package; grinding the active material to 800 mesh, taking 1 part of the active material and mixing it with 1 part of the nano-scale open-porous material, adding a small amount of graphene, and thoroughly mixing and stirring in a magnetic stirrer at 1000 rpm for 15 minutes to form a sustained-release active group package, wherein the active material comprises one or a combination of two or more of active silicon dioxide, active aluminum oxide, active lignin, and active magnesium oxide;

[0039] S2, preparing a hydrophobic group package; grouping the hydrophobic groups, fully grinding the hydrophobic groups to 800 mesh, adding them to a mixer for mixing, and stirring them evenly with a stirrer at high speed to obtain a hydrophobic group package, wherein the hydrophobic group comprises a combination of two or more of a polysiloxane dry powder hydrophobic agent, potassium methyl silicate, sodium methyl silicate, and calcium stearate;

[0040] S3, preparing a coagulant group package; grouping the coagulant components, grinding the coagulant components to 800 mesh, adding them to a mixer, and mixing them at high speed to obtain a coagulant group package, wherein the coagulant components include one or a combination of two or more of calcium formate, aluminate cement, sulfoaluminate cement, and anhydrous gypsum;

[0041] S4, preparing an expansion group bag; grouping the expansion components, fully grinding the expansion components to 800 mesh, adding them to a mixer and mixing them at high speed to obtain an expansion group bag, wherein the expansion components include 1 part of ultrafine low-activity magnesium oxide and 2 parts of ultrafine high-activity magnesium oxide;

[0042] S5, preparing a thickening and water-retaining group package; grouping the thickening and water-retaining ingredients, fully grinding the thickening and water-retaining ingredients to 800 mesh, adding them to a mixer, and mixing them at high speed to obtain a thickening and water-retaining group package, wherein the thickening and water-retaining ingredients include a combination of two or more of hydroxypropyl methylcellulose, methylcellulose, calcium chloride, and diatomaceous earth;

[0043] S6, preparing mud-inhibiting group packages; grouping the mud-inhibiting ingredients, fully grinding the mud-inhibiting ingredients to 800 mesh, adding them to a mixer, mixing them and stirring them at high speed to obtain a mud-inhibiting group package;

[0044] S7, preparing a fluidity group package; grouping the components that increase the fluidity of the slurry, fully grinding the components that increase the fluidity of the slurry to 800 mesh, adding them to a mixer, mixing and stirring at high speed to obtain a fluidity group package;

[0045] S8, mixing and stirring; after mixing the siliceous base material and ultrafine quartz sand, add the active group package, the expansion group package, the viscosity-enhancing and water-retaining group package and the mud-inhibiting group package into the stirrer in turn and mix and stir thoroughly for 15 minutes; then add the hydrophobic group package and stir evenly, then add the coagulant group package and stir evenly, finally add the auxiliary agent package and a small amount of graphene and stir thoroughly, and put the evenly stirred materials into the silo for packaging.

[0046] The self-repairing group cement is prepared from ordinary cement and active siliceous self-repairing materials.

[0047] The following mix ratios were used for the benchmark and self-repair groups in each group to prepare C35 concrete. The test was conducted in accordance with the requirements of GB 18445-2012, Cement-based Penetrating Crystalline Waterproof Materials (the benchmark concrete did not comply with the specification, but used the following standard mix ratios), as shown in the following table:

[0048] cement sand Pebbles water 386 643 1194 197

[0049] Experimental data:

[0050]

[0051]

[0052] Benchmark Group 1: Select a brand of PO42.5 ordinary Portland cement on the market.

[0053] Group 1: The raw materials used for self-healing ordinary Portland cement are 99 parts of the base group 1 cement and 1 part of the active siliceous self-healing material, which are fully stirred and mixed.

[0054] Benchmark Group 2: Select a brand of PL42.5 Portland cement on the market.

[0055] Group 2: The raw materials used for self-healing silicate cement are 99 parts of the benchmark group 2 cement and 1 part of the active siliceous self-healing material, which are fully stirred and mixed.

[0056] Benchmark Group 3: Select a brand of PP42.5 pozzolanic Portland cement on the market.

[0057] Group 3: Self-repairing pozzolanic silicate cement uses 99 parts of benchmark group 3 cement and 1 part of active siliceous self-repairing material, which are fully stirred and mixed.

[0058] Benchmark Group 4: Select a brand of PS42.5 slag Portland cement on the market.

[0059] Group 4: Self-repairing slag silicate cement uses raw materials made by fully mixing 99 parts of benchmark group 1 cement and 1 part of active siliceous self-repairing material.

[0060] Active siliceous self-healing materials imitate the healing function of biological tissue damage, forming an intelligent self-healing system inside the concrete. When cracks or damage appear in the concrete material, the repair reaction is automatically triggered under the action of water, making it densely healed.

[0061] Experimental data:

[0062] According to the "Inorganic Waterproof Leakage-Proofing Materials" test:

[0063]

[0064] According to the "Specification for Cement-based Penetrating Crystalline Waterproof Materials" GB 18445-2012

[0065]

[0066]

[0067] Example 2:

[0068] Reference Figures 1-6 , which specifically implements a formula of a cement-based active silica biomimetic self-repairing material, the formula is prepared according to the following mass parts:

[0069] 50 parts of siliceous base materials, 20 parts of ultrafine quartz sand, 25 parts of active group packages, 20 parts of expansion group packages, 4 parts of viscosity-enhancing and water-retaining group packages, 3 parts of mud-suppressing group packages, and 3 parts of fluidity group packages.

[0070] A preparation process of a cement-based active siliceous biomimetic self-repairing material, comprising the following steps:

[0071] S1, preparing an active group package; grinding the active material to 800 mesh, taking 1 part of the active material and mixing it with 1 part of the nano-scale open-porous material, adding a small amount of graphene, and thoroughly mixing and stirring in a magnetic stirrer at 1000 rpm for 15 minutes to form a sustained-release active group package, wherein the active material comprises one or a combination of two or more of active silicon dioxide, active aluminum oxide, active lignin, and active magnesium oxide;

[0072] S2, preparing a hydrophobic group package; grouping the hydrophobic groups, fully grinding the hydrophobic groups to 800 mesh, adding them to a mixer for mixing, and stirring them evenly with a stirrer at high speed to obtain a hydrophobic group package, wherein the hydrophobic group comprises a combination of two or more of a polysiloxane dry powder hydrophobic agent, potassium methyl silicate, sodium methyl silicate, and calcium stearate;

[0073] S3, preparing a coagulant group package; grouping the coagulant components, grinding the coagulant components to 800 mesh, adding them to a mixer, and mixing them at high speed to obtain a coagulant group package, wherein the coagulant components include one or a combination of two or more of calcium formate, aluminate cement, sulfoaluminate cement, and anhydrous gypsum;

[0074] S4, preparing an expansion group bag; grouping the expansion components, fully grinding the expansion components to 800 mesh, adding them to a mixer and mixing them at high speed to obtain an expansion group bag, wherein the expansion components include 1 part of ultrafine low-activity magnesium oxide and 2 parts of ultrafine high-activity magnesium oxide;

[0075] S5, preparing a thickening and water-retaining group package; grouping the thickening and water-retaining ingredients, fully grinding the thickening and water-retaining ingredients to 800 mesh, adding them to a mixer, and mixing them at high speed to obtain a thickening and water-retaining group package, wherein the thickening and water-retaining ingredients include a combination of two or more of hydroxypropyl methylcellulose, methylcellulose, calcium chloride, and diatomaceous earth;

[0076] S6, preparing mud-inhibiting group packages; grouping the mud-inhibiting ingredients, fully grinding the mud-inhibiting ingredients to 800 mesh, adding them to a mixer, mixing them and stirring them at high speed to obtain a mud-inhibiting group package;

[0077] S7, preparing a fluidity group package; grouping the components that increase the fluidity of the slurry, fully grinding the components that increase the fluidity of the slurry to 800 mesh, adding them to a mixer, mixing and stirring at high speed to obtain a fluidity group package;

[0078] S8, mixing and stirring; after mixing the siliceous base material and ultrafine quartz sand, add the active group package, the expansion group package, the viscosity-enhancing and water-retaining group package and the mud-inhibiting group package into the stirrer in turn and mix and stir thoroughly for 15 minutes; then add the hydrophobic group package and stir evenly, then add the coagulant group package and stir evenly, finally add the auxiliary agent package and a small amount of graphene and stir thoroughly, and put the evenly stirred materials into the silo for packaging.

[0079] The on-site measured crack self-repair effect is shown in Table 1 below:

[0080]

[0081] Table 1. The repair effect of Table 1 is as follows Figure 2 and Figure 3 The field-measured crack self-repairing effect is shown in Table 2 below:

[0082]

[0083] Table 2. The repair effect of Table 2 is as follows Figure 4-Figure 6 shown.

[0084] Application direction:

[0085] Active silica self-healing materials, as a cement activation activator, can be widely used in many fields of building materials and have great social significance:

[0086] 1. Preparation of self-repairing cement:

[0087] Self-repairing cement can be prepared by uniformly stirring 95-99.5 parts of cement and 0.5-5 parts of active siliceous self-repairing material or cement-based penetrating crystallization waterproofing agent at high speed.

[0088] Concrete produced with self-repairing cement formulated with active siliceous self-repairing materials can compensate for the negative effects of unstable aggregate quality to a certain extent, allowing the concrete to have the functions of crack resistance, impermeability and self-repair of cracks, and greatly improve its performance in terms of waterproofing, freeze-thaw resistance, and seawater resistance, thereby achieving the purpose of extending the service life of the building.

[0089] The prepared self-repairing cements include: self-repairing ordinary Portland cement, self-repairing Portland cement, self-repairing pozzolanic Portland cement, self-repairing slag Portland cement, etc.

[0090] 2. Preparation of self-repairing concrete:

[0091] In a commercial mixing station, active silica self-healing materials or cement-based penetrating crystallization waterproofing agents are added to concrete raw materials at a rate of 0.5% to 5% of the cement dosage and mixed together to produce self-healing concrete. The strength grades of self-healing concrete are divided into C30, C35, C40, C45, etc. In addition, according to the durability requirements of concrete, various types of frost-resistant concrete, seawater-resistant concrete, and sulfate-resistant concrete can be produced through inspection and verification.

[0092] 3. Recycling of slag as building materials:

[0093] Slag is currently typically disposed of through backfill. When exposed to groundwater, various hazardous chemicals can easily leak out, posing a threat to the environment and humans. Using slag as an aggregate in concrete or cement products, by adding active siliceous self-healing materials or cement-based penetrating crystallizing waterproofing agents, can enhance concrete performance and maintain its density through high impermeability. This improves concrete quality while achieving the comprehensive utilization of slag.

[0094] 4. Recycling of construction waste as building materials:

[0095] Construction waste accounts for 40% of the total urban waste. The best way to dispose of it is undoubtedly recycling and processing it into concrete aggregate. However, the processed construction waste as concrete aggregate still has problems in terms of quality and strength. By adding active silica self-healing materials or cement-based penetrating crystallization waterproofing agents, the performance of concrete can be greatly improved, and the shortcomings of recycled construction waste materials can be compensated to the greatest extent to meet engineering application requirements.

[0096] Active siliceous self-healing materials imitate the healing function of biological tissue damage, forming an intelligent self-healing system inside the concrete. When cracks or damage appear in the concrete material, the repair reaction is automatically triggered under the action of water, making it densely healed.

[0097] The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention should not be considered to be limited to these descriptions. For those skilled in the art of the present invention, several simple deductions or substitutions can be made without departing from the concept of the present invention, and all of these should be considered as the scope of protection of the present invention.

Claims

1. A formulation of a cement-based active siliceous biomimetic self-repairing material, characterized by: The formula is prepared according to the following mass parts: 30-60 parts of siliceous base materials, 10-20 parts of ultrafine quartz sand, 10-30 parts of active group package, 10-20 parts of expansion group package, 1-5 parts of viscosity-increasing and water-retaining group package, 1-3 parts of mud-suppressing group package, and 1-3 parts of fluidity group package.

2. A process for preparing a cement-based active siliceous biomimetic self-repairing material, characterized by: The preparation process is used to prepare the cement-based active siliceous biomimetic self-repairing material according to claim 1, and the preparation process comprises the following steps: S1, preparing an active group package; grinding the active material to 800 mesh, taking 1 part of the active material and mixing it with 1 part of the nano-scale open-porous material, adding a small amount of graphene, and thoroughly mixing and stirring in a magnetic stirrer at 1000 rpm for 15 minutes to form a sustained-release active group package; S2, preparing a hydrophobic group bag; grouping the hydrophobic groups, fully grinding the hydrophobic groups to 800 mesh, adding them to a mixer, and stirring them evenly with a stirrer at high speed to obtain a hydrophobic group bag; S3, preparing a coagulant group package; grouping the coagulant components, fully grinding the coagulant components to 800 mesh, adding them to a mixer, mixing them and stirring them at high speed to obtain a coagulant group package; S4, preparing an expanded group bag; grouping the expanded ingredients, fully grinding the expanded ingredients to 800 mesh, adding them to a mixer and mixing them at high speed to obtain an expanded group bag; S5, preparing a thickening and water-retaining group bag; grouping the thickening and water-retaining ingredients, fully grinding the thickening and water-retaining ingredients to 800 mesh, adding them to a mixer, mixing them and stirring them at high speed to obtain a thickening and water-retaining group bag; S6, preparing mud-inhibiting group packages; grouping the mud-inhibiting ingredients, fully grinding the mud-inhibiting ingredients to 800 mesh, adding them to a mixer, mixing them and stirring them at high speed to obtain a mud-inhibiting group package; S7, preparing a fluidity group package; grouping the components that increase the fluidity of the slurry, fully grinding the components that increase the fluidity of the slurry to 800 mesh, adding them to a mixer, mixing and stirring at high speed to obtain a fluidity group package; S8, mixing and stirring; after mixing the siliceous base material and ultrafine quartz sand, add the active group package, the expansion group package, the viscosity-enhancing and water-retaining group package and the mud-inhibiting group package into the stirrer in turn and mix and stir thoroughly for 15 minutes; then add the hydrophobic group package and stir evenly, then add the coagulant group package and stir evenly, finally add the auxiliary agent package and a small amount of graphene and stir thoroughly, and put the evenly stirred materials into the silo for packaging.

3. The process for preparing a cement-based active siliceous biomimetic self-repairing material according to claim 2, characterized in that: In the above-mentioned S1, the active material comprises one or a combination of two or more of active silicon dioxide, active aluminum oxide, active lignin and active magnesium oxide.

4. The process for preparing a cement-based active siliceous biomimetic self-repairing material according to claim 2, characterized in that: In S2, the hydrophobic group comprises a combination of two or more of a polysiloxane dry powder hydrophobic agent, potassium methyl silicate, sodium methyl silicate and calcium stearate.

5. The process for preparing a cement-based active siliceous biomimetic self-repairing material according to claim 2, characterized in that: In the S3, the accelerating setting component comprises one or a combination of two or more of calcium formate, aluminate cement, sulphoaluminate cement and anhydrous gypsum.

6. The process for preparing a cement-based active siliceous biomimetic self-repairing material according to claim 2, characterized in that: In the above-mentioned S4, the expansion component comprises 1 part of ultrafine low-activity magnesium oxide and 2 parts of ultrafine high-activity magnesium oxide.

7. The process for preparing a cement-based active siliceous biomimetic self-repairing material according to claim 2, characterized in that: In the above-mentioned S5, the viscosity-increasing and water-retaining component includes a combination of two or more of hydroxypropyl methylcellulose, methylcellulose, calcium chloride, and diatomaceous earth.

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