A high impermeability and high homogeneity cement-based repair mortar and a method for preparing the same

Abstract

The application discloses a kind of high anti-permeability high homogeneity cement-based repair mortar and preparation method thereof, belong to cement material preparation technical field.Concrete is: microcrystalline glass fine aggregate is dispersed to lye and is handled, after completion, the microcrystalline glass fine aggregate obtained is washed and placed in solution containing calcium ion source and carbon powder, then stirring heating reaction, obtain I-grade pretreatment fine aggregate;I-grade pretreatment fine aggregate is calcined in air atmosphere, and obtain II-grade pretreatment fine aggregate;II-grade pretreatment fine aggregate is placed in the mixed solution of sodium stearate and sodium alginate and is ultrasonically treated, then separate out solid, dry after III-grade pretreatment fine aggregate is obtained;III-grade pretreatment fine aggregate is mixed with cementitious component, silica fume, reinforcing fiber, water reducing agent, water and is stirred uniformly to obtain high anti-permeability high homogeneity cement-based repair mortar.The method of the application can make microcrystalline glass fine aggregate uniformly distributed in mortar, ensure repair effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cement mortar, in particular to a high-impervious high-homogeneous cement-based repair mortar and a preparation method thereof. BACKGROUND

[0002] Cement-based repair mortar is a material widely used for repairing cracks, pits, damages and other diseases of concrete structures such as roads, buildings and bridges, which usually needs to have good compressive strength, crack resistance and waterproof performance. Fine aggregate is an important component in cement-based repair mortar. Microcrystalline glass, also known as glass ceramic, is a new type of inorganic material between glass and ceramic, which can be made from industrial solid waste (such as blast furnace slag, steel slag, red mud, coal gangue, etc.) by high-temperature sintering. The sintered microcrystalline glass can be mechanically crushed to form coarse aggregate to replace natural aggregate for the preparation of concrete materials, which not only realizes the resource utilization of industrial solid waste, but also provides a new way for the treatment of industrial solid waste. A large amount of small particle size particulate matter is produced in the above crushing process, which can be used as fine aggregate for concrete materials. However, it is found through research that the use of such fine aggregate to prepare cement-based repair mortar can easily cause delamination / bleeding, because the fine aggregate mainly exists in the form of dense glass phase and hardly absorbs water. In addition, the water-cement ratio of cement-based repair mortar is usually higher than that of ordinary concrete materials to ensure that the mortar has good fluidity, which helps to better fill and repair the cracks. However, this also leads to delamination / bleeding during the hardening process after the repair mortar is filled into the site to be repaired, resulting in uneven repair structure, which not only reduces the surface quality, but also causes mechanical property degradation, affecting the repair effect. SUMMARY

[0003] In view of the problems in the prior art, the present application provides a high-impervious high-homogeneous cement-based repair mortar and a preparation method thereof, which not only makes the microcrystalline glass fine aggregate uniformly distributed in the mortar to avoid delamination / bleeding, but also improves the waterproof and impermeability of the mortar, thereby improving the repair effect of the mortar.

[0004] Specifically, the technical solutions of the present application are as follows:

[0005] A high-impervious high-homogeneous cement-based repair mortar, comprising III-grade pretreated fine aggregate, cementitious component, silica fume, reinforcing fiber, water reducing agent, defoaming agent and water.

[0006] The preparation method of the III-grade pretreated fine aggregate comprises the following steps:

[0007] (1) dispersing the microcrystalline glass fine aggregate into an alkali solution for surface treatment, after completion, washing the obtained fine aggregate and placing it in a solution containing a calcium ion source, while adding carbon powder thereto, then stirring the system and performing a heating reaction, after completion, separating the fine aggregate and washing to obtain a first-stage pretreated fine aggregate;

[0008] (2) performing calcination treatment on the first-stage pretreated fine aggregate in an air atmosphere to remove the carbon powder therefrom, to obtain a second-stage pretreated fine aggregate;

[0009] (3) placing the second-stage pretreated fine aggregate in a mixed solution of sodium stearate and sodium alginate for ultrasonic treatment, then separating the solid, and drying to obtain a third-stage pretreated fine aggregate.

[0010] Further, in step (1), the mass ratio of the microcrystalline glass fine aggregate to the alkali solution is 1:2-5.

[0011] Further, in step (1), the concentration of the alkali solution is 1-3 mol / L.

[0012] Further, in step (1), the alkali solution is any one of a sodium hydroxide solution, a potassium hydroxide solution, and a sodium silicate solution.

[0013] Further, in step (1), the surface treatment is performed for 4-5 h at a temperature of 60-75℃.

[0014] Further, in step (1), the mass ratio of the microcrystalline glass fine aggregate to the solution containing a calcium ion source is 1:4-8; optionally, the mass fraction of the calcium ion source in the solution containing a calcium ion source is 15-30%.

[0015] Further, in step (1), the calcium ion source is at least one of calcium chloride, calcium nitrate, and calcium bicarbonate.

[0016] Further, in step (1), the content of the carbon powder in the solution containing a calcium ion source after addition is 7-9.5 g / L; optionally, the fineness of the carbon powder is 300-400 mesh.

[0017] Further, in step (1), the heating reaction is performed at a temperature of 60-80℃ for 20-24 h.

[0018] Further, in step (2), the calcination treatment is performed at a temperature of 350-500℃ for 10-15 min.

[0019] Further, in step (3), the ratio of the second-stage pretreated fine aggregate to the mixed solution is 1 g:20-40 ml.

[0020] Furthermore, in step (3), the sodium stearate in the mixture is in a saturated state, and the mass fraction of sodium alginate is 0.5~1.5%.

[0021] Furthermore, in step (3), the ultrasonic treatment time is 3 to 5 minutes, so that the fine aggregate can absorb the mixture more quickly and fully.

[0022] Furthermore, the proportions of the Grade III pretreated fine aggregate, cementitious components, silica fume, reinforcing fiber, water-reducing agent, and defoamer are 470~610 parts by weight: 230~280 parts by weight: 20~30 parts by weight: 11~17 parts by weight: 3.6~5.8 parts by weight: 0.25~0.65 parts by weight.

[0023] Furthermore, the high impermeability and high homogeneity cement-based repair mortar is mixed with water at a water-cement ratio of 0.36 to 0.44.

[0024] Further, the reinforcing fiber includes at least one of glass fiber, polyethylene fiber, polypropylene fiber, polyacrylonitrile fiber, and polyvinyl alcohol fiber; optionally, the length of the reinforcing fiber is 0.5~2cm.

[0025] This invention discloses a method for preparing the high impermeability and high homogeneity cement-based repair mortar. Specifically, the method involves mixing Grade III pretreated fine aggregate with cementitious components, silica fume, reinforcing fibers, water-reducing agent, defoamer, and water, and then stirring the mixture evenly to obtain the high impermeability and high homogeneity cement-based repair mortar.

[0026] Compared with the prior art, the present invention has at least the following beneficial technical effects:

[0027] This invention involves first surface-treating the microcrystalline glass fine aggregate with an alkaline solution to create dense silicon-oxygen tetrahedra and aluminum-oxygen tetrahedra on its surface in OH solution. -under the action of sodium stearate and sodium alginate solution, and the sodium stearate and sodium alginate are absorbed and stored in the porous structure of the glass-ceramic fine aggregate. When the glass-ceramic fine aggregate is used to prepare a cement-based repair mortar, on the one hand, the porous structure can effectively improve the water absorption of the glass-ceramic fine aggregate, and reduce the phenomenon of delamination and bleeding of the fine aggregate and water caused by excessive free water in the mortar. On the other hand, the sodium alginate in the porous structure can form a viscous body after being contacted with water, which can effectively increase the bonding force between the glass-ceramic fine aggregate and the mortar, and reduce the delamination and bleeding phenomenon caused by the settlement of the glass-ceramic fine aggregate. At the same time, the calcium ions released by the cementitious components of the mortar during hydration promote the crosslinking of the sodium alginate, and the crosslinked body formed by the sodium alginate plays a good shaping role on the mortar system, which helps to further reduce the settlement of the glass-ceramic fine aggregate. On the other hand, the sodium stearate in the porous structure reacts with the calcium ions released by the cement hydration to form calcium stearate hydrophobic agent, and the organic film formed after the crosslinking of the sodium alginate and the calcium stearate hydrophobic agent together constitutes a waterproof system, which improves the water resistance of the mortar. Finally, the hydrated calcium silicate and hydrated calcium aluminate on the surface of the glass-ceramic fine aggregate also have the effect of promoting the hydration of cement, which helps to form more cementitious components, and in combination with the porous characteristics of the glass-ceramic fine aggregate, the bonding mode between the glass-ceramic fine aggregate and the mortar is changed from planar contact to interlaced contact, which effectively improves the mechanical strength and crack resistance of the structure of the hardened mortar. BRIEF DESCRIPTION OF DRAWINGS

[0028] The accompanying drawings, which form a part of the present description, illustrate the present application and, together with the written description, serve to explain the principles of the present application. In the drawings:

[0029] Figure 1 Sample picture of the III-grade pretreated fine aggregate prepared for the following Example 1;

[0030] Figure 2 Sample picture of the III-grade pretreated fine aggregate prepared for the following Example 2;

[0031] Figure 3 Sample picture of the III-grade pretreated fine aggregate prepared for the following Example 3. DETAILED DESCRIPTION

[0032] The application will be further described in conjunction with specific examples. It should be understood that these examples are only used to illustrate the application and not used to limit the scope of the application. The experimental methods in the following examples without specific conditions are generally according to the conventional conditions or according to the conditions suggested by the manufacturers.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The reagents or materials used in the application can be purchased through conventional routes. Unless otherwise specified, the reagents or materials used in the application are used according to the conventional methods in the art or according to the product instructions. The preparation method of the high impermeability and high homogeneity cement-based repair mortar of the application will be further described in conjunction with the drawings and specific embodiments of the application.

[0034] Example 1

[0035] A preparation method of a high impermeability and high homogeneity cement-based repair mortar, comprising the following steps:

[0036] (1) The microcrystalline glass fine aggregate with a particle size distribution of 0.5-1.5 mm is mixed with a 2 mol / L sodium hydroxide solution at a mass ratio of 1:4, stirred uniformly, heated to 70°C for 4.5 h for surface treatment; after completion, the microcrystalline glass fine aggregate is filtered out, washed with clean water to remove residual alkali solution, then mixed with a 20 wt% calcium nitrate solution at a mass ratio of 1:6, and 300 mesh carbon powder is added at a dosage of 8 g / L, then stirred uniformly, the obtained reaction system is heated to 75°C, and the reaction is carried out under continuous stirring for 24 h, the microcrystalline glass fine aggregate is filtered out, washed with clean water, and then dried to control the moisture content, to obtain a first-stage pretreated fine aggregate, which is ready for use;

[0037] (2) The first-stage pretreated fine aggregate is heated to 480°C at a heating rate of 10°C / min in an air atmosphere for 12 min, and then cooled to room temperature to obtain a second-stage pretreated fine aggregate, which is ready for use;

[0038] (3) Sodium alginate is added to a saturated aqueous solution of sodium stearate and stirred until fully dissolved to form a mixed solution, wherein the mass fraction of sodium alginate is 1%; the second-stage pretreated fine aggregate is mixed with the mixed solution at a ratio of 1 g:30 ml, then ultrasonically treated for 5 min, and then the solid is filtered out and dried at 50°C for 60 min to obtain a third-stage pretreated fine aggregate, as shown in Figure 1 .

[0039] (4) Take the following proportions of components: 530 parts by weight of the III-grade pretreated fine aggregate, 260 parts by weight of 42.5 ordinary portland cement, 25 parts by weight of silica fume, 13 parts by weight of polyethylene fiber with a length of 1 cm, 4.7 parts by weight of polycarboxylate superplasticizer, and 0.45 parts by weight of silicone defoamer; after mixing the above components, add clean water according to a water-cement ratio of 0.41 and stir uniformly, to obtain the cement-based repair mortar.

[0040] Performance test:

[0041] (1) Pour the cement-based repair mortar prepared in this embodiment into a mold with dimensions of 15 cm x 15 cm x 15 cm, demold after hardening, and then cure in a standard curing box for 7 days. Then cut the obtained test piece horizontally in the middle into upper and lower parts, and measure the mass m1 and m2 of the two parts of the test piece respectively; the homogeneity Y = m1 / m2, the closer the value is to 1, the better the homogeneity of the cement-based repair mortar. Test five groups of samples according to the above method, and then calculate the average value of the homogeneity Y.

[0042] (2) According to the "Cement mortar strength test method (ISO method)" (GB / T 17671-2021), test the compressive strength of the cement-based repair mortar prepared in this embodiment, with an age of 28d.

[0043] (3) According to the "Standard for long-term performance and durability test methods of ordinary concrete" (GBT50082-2009), test the water penetration height of the cement-based repair mortar prepared in this embodiment.

[0044] The test results of the cement-based repair mortar prepared in Example 1 are as follows: homogeneity Y = 0.968, compressive strength = 31.02 MPa, and water penetration height = 30.1 mm.

[0045] Example 2

[0046] A preparation method of a high-impervious high-homogeneous cement-based repair mortar, comprising the following steps:

[0047] (1) Mix the microcrystalline glass fine aggregate with a particle size distribution of 0.5-1.5 mm and 3 mol / L sodium hydroxide solution at a mass ratio of 1:2, stir uniformly, heat to 60℃ and keep for 5h for surface treatment, then filter out the microcrystalline glass fine aggregate, wash with clean water to remove residual alkali solution, then mix with 15wt% calcium bicarbonate solution at a mass ratio of 1:8, add 400 mesh carbon powder at a dosage of 9.5g / L, stir uniformly, then heat the obtained reaction system to 60℃, and keep the reaction under continuous stirring for 22h, filter out the microcrystalline glass fine aggregate, wash with clean water, and control the moisture content to obtain I-grade pretreated fine aggregate for standby use;

[0048] (2) heating the first-stage pretreated fine aggregate to 350℃ at a heating rate of 10℃ / min in an air atmosphere for 15 min, and then cooling to room temperature to obtain the second-stage pretreated fine aggregate, which is ready for use;

[0049] (3) adding sodium alginate into a saturated aqueous solution of sodium stearate and stirring until the sodium alginate is completely dissolved to form a mixed solution, wherein the mass fraction of the sodium alginate is 1.5%; mixing the second-stage pretreated fine aggregate with the mixed solution at a ratio of 1 g: 20 ml, and then ultrasonic treating for 4 min, and then filtering out the solid, and drying at 50℃ for 60 min to obtain the third-stage pretreated fine aggregate, as shown in Figure 2 ;

[0050] (4) taking components in the following proportions: 610 parts by weight of the third-stage pretreated fine aggregate, 280 parts by weight of 42.5 ordinary portland cement, 30 parts by weight of silica fume, 17 parts by weight of polyvinyl alcohol fibers with a length of 2 cm, 5.8 parts by weight of polycarboxylate superplasticizer, and 0.65 parts by weight of silicone defoaming agent; mixing the above components, and then adding water according to a water-cement ratio of 0.36 to obtain the cement-based repair mortar.

[0051] Performance test: the homogeneity Y, compressive strength and water permeability of the cement-based repair mortar prepared in Example 2 were tested according to the method described in Example 1, and the results are as follows: homogeneity Y = 0.981 mm, compressive strength = 34.26 MPa, and water permeability = 28.2 mm.

[0052] Example 3

[0053] A preparation method of a high-water-permeability and high-homogeneity cement-based repair mortar, comprising the following steps:

[0054] (1) mixing microcrystalline glass fine aggregate with a particle size distribution of 0.5-1.0 mm and a 1 mol / L sodium silicate solution at a mass ratio of 1:5, stirring uniformly, and then heating to 75℃ for 4 h for surface treatment, filtering out the microcrystalline glass fine aggregate, washing with water to remove residual alkali, and then mixing with a 30 wt% calcium chloride solution at a mass ratio of 1:4, adding 350 mesh carbon powder at a dosage of 7 g / L, and stirring uniformly, and then heating the obtained reaction system to 80℃, and continuously stirring for 20 h, filtering out the microcrystalline glass aggregate, washing with water, and controlling the moisture content to obtain the first-stage pretreated fine aggregate, which is ready for use;

[0055] (2) heating the first-stage pretreated fine aggregate to 500℃ at a heating rate of 10℃ / min in an air atmosphere for 10 min, and then cooling to room temperature to obtain the second-stage pretreated fine aggregate, which is ready for use;

[0056] (3) adding sodium alginate into the saturated sodium stearate aqueous solution and stirring until the sodium alginate is fully dissolved to form a mixed solution, wherein the mass fraction of the sodium alginate is 0.5%; mixing the second-grade pretreated fine aggregate with the mixed solution at a ratio of 1 g: 40 ml and then ultrasonic treating for 3 min, filtering out the solid, and drying at 50℃ for 60 min to obtain the third-grade pretreated fine aggregate, as shown in Figure 3

[0057] (4) taking components in the following proportions: 470 parts by weight of the third-grade pretreated fine aggregate, 230 parts by weight of 42.5 ordinary portland cement, 20 parts by weight of silica fume, 11 parts by weight of glass fiber with a length of 0.5 cm, 3.6 parts by weight of polycarboxylate superplasticizer, and 0.25 parts by weight of silicone defoaming agent; mixing the above components and then adding water at a water-cement ratio of 0.44 to obtain the cement-based repair mortar.

[0058] Performance test: the homogeneity Y, compressive strength and water permeability of the cement-based repair mortar prepared in this example 3 were tested by the method described in example 1, and the results are shown as follows: homogeneity Y = 0.977 mm, compressive strength = 30.12 MPa, and water permeability = 33.4 mm.

[0059] Comparative example 1

[0060] A method for preparing a high-water-permeability and high-homogeneity cement-based repair mortar, comprising the following steps:

[0061] Taking components in the following proportions: 530 parts by weight of microcrystalline glass fine aggregate with a particle size distribution of 0.5-1.5 mm, 260 parts by weight of 42.5 ordinary portland cement, 25 parts by weight of silica fume, 13 parts by weight of polyethylene fiber with a length of 1 cm, 4.7 parts by weight of polycarboxylate superplasticizer, and 0.45 parts by weight of silicone defoaming agent; mixing the above components and then adding water at a water-cement ratio of 0.41 to obtain the cement-based repair mortar.

[0062] Performance test: the homogeneity Y, compressive strength and water permeability of the cement-based repair mortar prepared in this comparative example 1 were tested by the method described in example 1, and the results are shown as follows: homogeneity Y = 0.763 mm, compressive strength = 24.47 MPa, and water permeability = 56.3 mm.

[0063] Comparative example 2

[0064] A method for preparing a high-water-permeability and high-homogeneity cement-based repair mortar, compared with the above example 1, the third-grade pretreated fine aggregate in this example is prepared by the following method:

[0065] ​(1) The glass-ceramic fine aggregate with particle size distribution between 0.5-1.5 mm is mixed with 2 mol / L sodium hydroxide solution at a mass ratio of 1:4, stirred uniformly, heated to 70℃ for 4.5 h for surface treatment, then filtered to obtain the glass-ceramic fine aggregate, washed with water to remove residual alkali solution, then mixed with 20% calcium nitrate solution at a mass ratio of 1:6, stirred uniformly, then heated to 75℃ under continuous stirring for 24 h, filtered to obtain the glass-ceramic fine aggregate, washed with water, and dried to obtain the first-stage pretreated fine aggregate for standby.

[0066] (2) The first-stage pretreated fine aggregate is heated to 480℃ at a heating rate of 10℃ / min in an air atmosphere for 12 min, then cooled to room temperature to obtain the second-stage pretreated fine aggregate for standby.

[0067] (3) Sodium alginate is added to a saturated aqueous sodium stearate solution and stirred until dissolved to form a mixed solution, wherein the mass fraction of sodium alginate is 1%; the second-stage pretreated fine aggregate is mixed with the mixed solution at a ratio of 1 g:30 ml, then ultrasonically treated for 5 min, then filtered to obtain a solid, which is dried at 50℃ for 60 min to obtain the third-stage pretreated fine aggregate.

[0068] Performance test: The homogeneity Y, compressive strength and water permeation resistance of the cement-based repair mortar prepared in Comparative Example 2 are tested by the method described in Example 1; the results are as follows: homogeneity Y=0.824 mm, compressive strength=26.35 MPa, water permeation height=51.7 mm.

[0069] Comparative Example 3

[0070] A method for preparing a high-water-permeation-resistance and high-homogeneity cement-based repair mortar, comprising the following steps:

[0071] The following components are taken in the following proportions: 610 parts by weight of the second-stage pretreated fine aggregate prepared in Example 2, 280 parts by weight of 42.5 ordinary portland cement, 30 parts by weight of silica fume, 17 parts by weight of polyvinyl alcohol fiber with a length of 2 cm, 5.8 parts by weight of polycarboxylate superplasticizer, and 0.65 parts by weight of silicone defoamer; the above components are mixed, then water is added at a water-cement ratio of 0.36 to obtain the cement-based repair mortar.

[0072] Performance test: The homogeneity Y, compressive strength and water permeation resistance of the cement-based repair mortar prepared in Comparative Example 3 are tested by the method described in Example 1; the results are as follows: homogeneity Y=0.916 mm, compressive strength=34.87 MPa, water permeation height=42.8 mm.

[0073] Comparative Example 4

[0074] A preparation method of a high-impervious high-homogeneous cement-based repair mortar, compared with the above-mentioned embodiment 3, the III-grade pretreated fine aggregate of the present embodiment is prepared by the following method:

[0075] (1) The microcrystalline glass fine aggregate with a particle size distribution of 0.5-1.0 mm is mixed with a 1 mol / L sodium silicate solution at a mass ratio of 1:5, stirred uniformly, heated to 75°C for 4 h for surface treatment, filtered out after completion, washed with clean water to remove residual alkali solution, then mixed with a 30% calcium chloride solution at a mass ratio of 1:4, and 350 mesh carbon powder is added at a dosage of 7 g / L, then stirred uniformly, then the obtained reaction system is heated to 80°C, and the fine aggregate is filtered out under continuous stirring for 20 h, washed with clean water, then dried to control the moisture content, to obtain a I-grade pretreated fine aggregate, ready for use.

[0076] (2) The I-grade pretreated fine aggregate is heated to 500°C at a heating rate of 10°C / min in an air atmosphere for 10 min, cooled to room temperature after completion, to obtain a II-grade pretreated fine aggregate, ready for use.

[0077] (3) The II-grade pretreated fine aggregate is mixed with a saturated sodium stearate solution at a ratio of 1 g:40 ml, then ultrasonically treated for 3 min, then the solid is filtered out, dried at 50°C for 60 min, to obtain a III-grade pretreated fine aggregate.

[0078] Performance test: the homogeneity Y, compressive strength and water permeability performance of the cement-based repair mortar prepared in the present comparative example are tested; the results are as follows: homogeneity Y=0.952 mm, compressive strength=30.69 MPa, water permeability height=47.3 mm.

[0079] The above only describes the preferred embodiments of the present application and is not intended to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still repair the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features. Any repair, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A high-permeability, high-homogeneity cement-based repair mortar, characterized in that, The high impermeability and high homogeneity cement-based repair mortar includes Class III pretreated fine aggregate, cementitious components, silica fume, reinforcing fibers, water-reducing agent, defoamer, and water; The method for preparing the Grade III pretreated fine aggregate includes the following steps: (1) The fine aggregate of microcrystalline glass is dispersed in an alkaline solution for surface treatment. After the treatment, the fine aggregate is washed and placed in a solution containing a calcium ion source. Carbon powder is added to the solution. The system is then stirred and heated to react. After the reaction is completed, the fine aggregate is separated and washed to obtain Grade I pretreated fine aggregate. (2) The first-grade pretreated fine aggregate is calcined in air to remove carbon powder, thereby obtaining second-grade pretreated fine aggregate; (3) The Grade II pretreated fine aggregate is placed in a mixture of sodium stearate and sodium alginate for ultrasonic treatment, and then the solids are separated and dried to obtain Grade III pretreated fine aggregate. In step (1), the temperature of the heating reaction is 60~80℃, and the heating reaction time is 20~24h; In step (2), the calcination treatment is carried out at a temperature of 350~500℃ for 10~15 minutes. The proportions of the pretreated fine aggregate, cementitious components, silica fume, reinforcing fiber, water-reducing agent, and defoamer in the Class III pretreatment are 470~610 parts by weight: 230~280 parts by weight: 20~30 parts by weight: 11~17 parts by weight: 3.6~5.8 parts by weight: 0.25~0.65 parts by weight.

2. The high impermeability and high homogeneity cement-based repair mortar according to claim 1, characterized in that, In step (1), the mass ratio of the microcrystalline glass aggregate to the alkaline solution is 1:2~5; in step (1), the concentration of the alkaline solution is 1~3 mol / L; in step (1), the alkaline solution is any one of sodium hydroxide solution, potassium hydroxide solution, or sodium silicate solution; in step (1), the surface treatment time is 4~5 h and the temperature is 60~75℃.

3. The high impermeability and high homogeneity cement-based repair mortar according to claim 1, characterized in that, In step (1), the mass ratio of the microcrystalline glass aggregate to the solution containing the calcium ion source is 1:4~8; in step (1), the mass fraction of the calcium ion source in the solution containing the calcium ion source is 15~30%; in step (1), the calcium ion source is at least one of calcium chloride, calcium nitrate, and calcium bicarbonate.

4. The high impermeability and high homogeneity cement-based repair mortar according to claim 1, characterized in that, In step (1), the content of the carbon powder in the solution containing calcium ion source is 7~9.5g / L after it is added; in step (1), the fineness of the carbon powder is 300~400 mesh.

5. The high impermeability and high homogeneity cement-based repair mortar according to claim 1, characterized in that, In step (3), the ratio of the pretreated fine aggregate to the mixture is 1g: 20~40ml; in step (3), the sodium stearate in the mixture is saturated and the mass fraction of sodium alginate is 0.5~1.5%; in step (3), the ultrasonic treatment time is 3~5min.

6. The high impermeability and high homogeneity cement-based repair mortar according to claim 1, characterized in that, The high impermeability and high homogeneity cement-based repair mortar is mixed with water at a water-cement ratio of 0.36~0.44; The length of the reinforcing fiber is 0.5~2cm.

7. A method for preparing a high-permeability, high-homogeneity cement-based repair mortar according to any one of claims 1 to 6, characterized in that, The high-permeability and high-homogeneity cement-based repair mortar is obtained by mixing the pretreated fine aggregate (Grade III) with cementitious components, silica fume, reinforcing fibers, water-reducing agent, defoamer, and water, and stirring evenly.

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