A basement waterproof, moisture-proof and mildew-proof construction technology

Abstract

The present invention relates to a waterproof, moisture-proof and mildew-proof construction process for a basement, which is characterized in that it comprises the following steps: Step 1, cleaning the walls and the floor of the basement; Step 2, detecting whether the walls and the floor of the cleaned basement are flat; Step 3, drying the walls and the floor of the basement, and then coating the spacer primer; Step 4, after the spacer primer is dried, coating the surface of the spacer primer with a waterproof topcoat; Step 5, curing and drying until it is completely solidified, that is, completing the construction. The present invention adopts an environmentally friendly water-based double-layer coating for the waterproof construction of the basement. Among them, the spacer primer is an epoxy water-based coating, which is a varnish coating with strong adhesion, so that it has good adhesion with concrete; the waterproof topcoat is an acrylic water-based coating with a new formula, which not only has excellent waterproof properties, but also has high strength and good mildew resistance.

Description

Technical Field

[0001] The invention relates to the field of building construction, and in particular to a waterproof, moisture-proof and mildew-proof construction process for a basement. Background Art

[0002] With the popularity of high-rise buildings, building basements are becoming more and more common. Since there is often groundwater or soil water outside the basement, if the basement floor and the outer wall are not waterproofed properly, leakage is likely to occur; leakage in the basement will seriously affect the normal use of the basement, and the repair cost is also very expensive.

[0003] The traditional method of waterproofing a basement is to lay waterproofing membranes or apply waterproof coatings on the concrete base. Both waterproofing membranes and waterproof coatings are common choices, and they each have their own advantages. In terms of integrity, waterproof coatings form a seamless whole after application, while waterproofing membranes rely on sheet splicing, which poses the risk of loose joints. In terms of the treatment of special-shaped parts, waterproof coatings can more densely apply complex parts, such as areas with many pipes and complex equipment, while membranes may be difficult to fit tightly in these areas. In terms of anti-water-crossing performance, once the membrane is damaged, water will spread rapidly, while the unaffected parts of the coating after damage can still play a waterproof role. In terms of aging resistance, qualified waterproofing membranes are usually more durable than coatings, but there are also high-quality aging-resistant coatings available on the market. Therefore, the advantages of waterproof coatings being more widely used and more convenient to construct make them more popular in the market.

[0004] Currently on the market, traditional waterproof coatings often experience aging, cracking, and falling off. As the market changes, people's requirements for waterproofing, moisture-proofing, and mildew-proofing are also increasing, and traditional waterproof coatings can no longer meet market requirements. Summary of the invention

[0005] In view of the problems existing in the prior art, the object of the present invention is to provide a basement waterproof, moisture-proof and mildew-proof construction process.

[0006] The purpose of the present invention is achieved by the following technical solutions:

[0007] A basement waterproof, moisture-proof and mildew-proof construction process comprises the following steps:

[0008] Step 1: Before applying the waterproof coating, clean the walls and floors of the basement. For example, dirt such as dust, mold, and oil stains need to be cleaned up, otherwise it will affect the application effect of the coating.

[0009] Step 2: Check whether the walls and floors of the cleaned basement are flat, and promptly renovate or fill any uneven or loose areas to avoid the overall waterproofing effect being affected by the falling of concrete on the walls and floors;

[0010] Step 3: Dry the walls and floors of the basement, and then apply the interval primer. The interval primer is generally a buffer layer, which is thinner than the topcoat and plays a role in enhancing adhesion and buffering protection.

[0011] Step 4: After the interval primer is dry, apply waterproof topcoat on the surface of the interval primer. The topcoat needs to completely cover the primer and the coating process needs to be evenly coated. It is best to complete it in one go. If necessary, it can be repeated 2-3 times.

[0012] Step 5. After coating, check for any missing or missing areas. After the topcoat has dried on the surface, perform maintenance and drying until it is completely cured. This completes the construction.

[0013] Preferably, in the step 3, the components of the spacer primer are calculated by weight and include:

[0014] 40-50 parts of waterborne epoxy resin emulsion, 3-7 parts of polyethylene glycol, 0.4-0.8 parts of a first defoamer, 0.5-1 parts of a first leveling agent, 15-25 parts of a curing agent and 10-20 parts of deionized water.

[0015] Preferably, the model of the waterborne epoxy resin emulsion is DER-916 or DER-909G; the polyethylene glycol is one of PGE-200, PGE-400 and PGE-600.

[0016] Preferably, the first defoaming agent is one of BYK-011, BYK-024 and BYK-028; and the first leveling agent is BYK-333 or BYK-345.

[0017] Preferably, the curing agent is a water-based room temperature curing agent CYDHD-220.

[0018] Preferably, the preparation process of the spacer primer is to firstly mix the components of the spacer primer except the curing agent evenly, and then mix with the curing agent before use.

[0019] Preferably, in the fourth step, the components of the waterproof topcoat are calculated by weight and include:

[0020] 60-80 parts of water-based acrylic emulsion, 18-32 parts of active silicon powder, 10-15 parts of modifying additives, 0.6-1.2 parts of a second defoaming agent, 0.8-1.6 parts of a second leveling agent, 1-3 parts of a film-forming agent and 25-35 parts of deionized water.

[0021] Preferably, the model of the aqueous acrylic emulsion is Hanwha SX-1420 or Hanwha RV-4916.

[0022] Preferably, the second defoaming agent is one of TEGO-901W, TEGO-810, and TEGO-902W; the second leveling agent is BYK-381 or BYK-333; and the film-forming agent is alcohol ester 12.

[0023] Preferably, the preparation process of the active silicon powder comprises:

[0024] Blending silicon micropowder with a particle size of 10-20 μm and silane coupling agent KH-560 into anhydrous ethanol, reflux for 2-6 hours, filtering to remove the liquid, washing with water and drying to obtain active silicon micropowder;

[0025] The mass volume ratio of silicon micropowder, KH-560 and anhydrous ethanol is 1g:(0.16-0.32)g:(20-40)mL.

[0026] Preferably, the preparation method of the modified additive comprises:

[0027] Step a, mixing micron-sized calcium boride and anhydrous ethanol, reflux for 0.5-1.5 hours, adding 3-aminopropyltriethoxysilane (KH-550), reflux again for 2-6 hours, then filtering to remove the liquid, washing and drying to obtain aminated calcium boride;

[0028] Step b, mixing glycidyl methacrylate (GMA) and anhydrous ethanol, stirring and dissolving them, adding calcium boron amide, and then refluxing for 3-5 hours, filtering to remove the liquid, washing and drying to obtain activated calcium boron;

[0029] Step c, 4-mercaptopyridine and anhydrous ethanol are mixed and dissolved uniformly, activated calcium boride is added, and the mixture is stirred under ultraviolet light for 1-3 hours, and then the liquid is removed by filtering, and the modified additive is obtained after washing and drying.

[0030] Preferably, in step a, the particle size of micron-sized calcium boride (CaB6) is 10-20 μm.

[0031] Preferably, in step a, the mass volume ratio of calcium boride, 3-aminopropyltriethoxysilane and anhydrous ethanol is 1 g: (0.15-0.3) g: (15-35) mL.

[0032] Preferably, in step b, the mass volume ratio of calcium boroamide, glycidyl methacrylate and anhydrous ethanol is 1 g: (0.28-0.56) g: (20-40) mL.

[0033] Preferably, in step c, the mass volume ratio of activated calcium boride, 4-mercaptopyridine and anhydrous ethanol is 1 g: (0.12-0.24) g: (20-40) mL.

[0034] Preferably, the waterproof topcoat is prepared by mixing all ingredients evenly before use.

[0035] The beneficial effects of the present invention are:

[0036] 1. The present invention adopts environmentally friendly water-based double-layer coating for basement waterproofing construction. Among them, the interval primer is epoxy water-based coating, which is a varnish coating with strong adhesion, so that it has good adhesion with concrete; the waterproof topcoat is an acrylic water-based coating with a new formula, which not only has excellent waterproofness, but also has high strength and good mildew resistance.

[0037] 2. The waterproof topcoat prepared by the present invention is an acrylic water-based paint. The main raw material is a water-based acrylic emulsion, and the filler is a compound of active silicon micropowder and modified additives. Compared with conventional acrylic paints, not only the surface strength and waterproofness are greatly improved, but also the paint has excellent moisture resistance and waterproofness.

[0038] 3. The modified additive used in the waterproof topcoat is prepared based on high hardness and high stability calcium boride. The specific process is that the surface is first modified by amino using a coupling agent to obtain amino calcium boride; then it is reacted with glycidyl methacrylate containing epoxy groups to obtain surface activated calcium boride through epoxy-amino combination; the surface of the activated calcium boride contains abundant double bonds after activation, and it undergoes a thiol-double bond click chemical reaction with 4-mercaptopyridine containing thiol groups.

[0039] 4. The modified additive prepared by the present invention is used as an auxiliary filler for waterproof topcoat, which not only enhances the strength and waterproofness of the waterproof topcoat, but also the pyridine group and the generated amide group and thioether group have good mildew inhibition, thereby enhancing the mildew resistance of the waterproof topcoat. DETAILED DESCRIPTION

[0040] The technical solution of the present invention is described below through specific examples. It should be understood that the one or more method steps mentioned in the present invention do not exclude the existence of other method steps before and after the combination step or the insertion of other method steps between these explicitly mentioned steps; it should also be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. Moreover, unless otherwise specified, the numbering of each method step is only a convenient tool for identifying each method step, and is not intended to limit the order of arrangement of each method step or to limit the scope of the present invention. The change or adjustment of the relative relationship thereof shall also be regarded as the scope of the present invention without substantially changing the technical content.

[0041] In order to better understand the above technical scheme, the exemplary embodiments of the present invention are described in more detail below. Although exemplary embodiments of the present invention are shown, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to enable the scope of the present invention to be fully communicated to those skilled in the art.

[0042] The present invention will be further described below in conjunction with the following examples.

[0043] Example 1

[0044] A basement waterproof, moisture-proof and mildew-proof construction process comprises the following steps:

[0045] Step 1: Before applying the waterproof coating, clean the walls and floors of the basement. For example, dirt such as dust, mold, and oil stains need to be cleaned up, otherwise it will affect the application effect of the coating.

[0046] Step 2: Check whether the walls and floors of the cleaned basement are flat, and promptly renovate or fill any uneven or loose areas to avoid the overall waterproofing effect being affected by the falling of concrete on the walls and floors;

[0047] Step 3: Dry the walls and floors of the basement, and then apply the spacer primer with a coating thickness of 0.3mm. The spacer primer is generally a buffer layer, which is thinner than the topcoat and plays a role in enhancing adhesion and buffering protection. The components of the spacer primer are calculated by weight, including: 45 parts of water-based epoxy resin emulsion DER-916, 5 parts of polyethylene glycol PGE-400, 0.6 parts of defoamer BYK-011, 0.6 parts of leveling agent BYK-333, 20 parts of curing agent CYDHD-220 and 15 parts of deionized water. First, mix the components of the spacer primer except the curing agent evenly, and then mix with the curing agent before use.

[0048] Step 4: After the interval primer has dried for 24 hours, apply waterproof topcoat on the surface of the interval primer. The topcoat needs to completely cover the primer with a coating thickness of 0.6 mm. The coating process needs to be uniform and repeated twice. Repeated coating requires the last coating to dry before re-coating. The ingredients of the waterproof topcoat are calculated by weight, including: 70 parts of water-based acrylic emulsion Hanhua SX-1420, 24 parts of active silica powder, 12 parts of modified additives, 0.9 parts of defoamer TEGO-901W, 1.2 parts of leveling agent BYK-381, 2 parts of film-forming agent alcohol grease 12 and 30 parts of deionized water. Mix all the ingredients evenly before use.

[0049] Step 5. After coating, check for any missing or missing areas. After the topcoat is dry, dry and cure until it is completely cured, which takes 36 hours. This completes the construction.

[0050] Among them, the preparation process of active silica powder in the composition of waterproof topcoat includes:

[0051] Silica powder with a particle size of 10-20 μm and silane coupling agent KH-560 are mixed into anhydrous ethanol, refluxed for 4 hours, the liquid is filtered out, and active silica powder is obtained after washing and drying; the mass volume ratio of silica powder, KH-560 and anhydrous ethanol is 1g:0.24g:30mL.

[0052] The preparation method of the modified additive in the composition of the waterproof topcoat includes:

[0053] a. Mix micron-sized calcium boride (CaB6, particle size 10-20 μm) and anhydrous ethanol, reflux for 1 hour, add 3-aminopropyltriethoxysilane (KH-550), reflux for 4 hours, filter to remove the liquid, wash and dry to obtain aminated calcium boride; the mass volume ratio of calcium boride, 3-aminopropyltriethoxysilane and anhydrous ethanol is 1g:0.2g:20mL.

[0054] b. Mix glycidyl methacrylate (GMA) and anhydrous ethanol, stir and dissolve them thoroughly, then add calcium boronamide, the mass volume ratio of calcium boronamide, glycidyl methacrylate and anhydrous ethanol is 1g:0.42g:30mL, then reflux for 4h, filter to remove the liquid, wash and dry to obtain activated calcium boronamide;

[0055] c. Mix 4-mercaptopyridine and anhydrous ethanol, and add activated calcium boride after dissolving evenly. The mass volume ratio of activated calcium boride, 4-mercaptopyridine and anhydrous ethanol is 1g:0.18g:30mL. Stir under ultraviolet light for 2h, then filter to remove the liquid, wash and dry to obtain a modified additive.

[0056] Example 2

[0057] A basement waterproof, moisture-proof and mildew-proof construction process comprises the following steps:

[0058] Step 1: Before applying the waterproof coating, clean the walls and floors of the basement. For example, dirt such as dust, mold, and oil stains need to be cleaned up, otherwise it will affect the application effect of the coating.

[0059] Step 2: Check whether the walls and floors of the cleaned basement are flat, and promptly renovate or fill any uneven or loose areas to avoid the overall waterproofing effect being affected by the falling of concrete on the walls and floors;

[0060] Step 3: Dry the walls and floors of the basement, and then apply the spacing primer. The spacing primer is generally a buffer layer, which is thinner than the topcoat and plays a role in enhancing adhesion and buffering protection. The ingredients of the spacing primer are calculated by weight, including: 40 parts of water-based epoxy resin emulsion DER-916, 3 parts of polyethylene glycol PGE-200, 0.4 parts of defoamer BYK-024, 0.5 parts of leveling agent BYK-333, 15 parts of curing agent CYDHD-220 and 10 parts of deionized water. First, mix the ingredients except the curing agent in the spacing primer evenly, and then mix with the curing agent before use.

[0061] Step 4: After the interval primer has dried for 24 hours, apply waterproof topcoat on the surface of the interval primer. The topcoat needs to completely cover the primer, and the coating process needs to be evenly coated and completed in one go. The ingredients of the waterproof topcoat are calculated by weight, including: 60 parts of water-based acrylic emulsion Hanhua RV-4916, 18 parts of active silica powder, 10 parts of modifying additives, 0.6 parts of defoamer TEGO-810, 0.8 parts of leveling agent BYK-381, 1 part of film-forming agent alcohol grease 12 and 25 parts of deionized water. Mix all the ingredients evenly before use.

[0062] Step 5. After coating, check for any missing or missing areas. Wait for the topcoat to dry on the surface, and then dry and cure until it is completely cured, which takes 24 hours. This completes the construction.

[0063] Among them, the preparation process of active silica powder in the composition of waterproof topcoat includes:

[0064] Silica powder with a particle size of 10-20 μm and silane coupling agent KH-560 are mixed into anhydrous ethanol, refluxed for 2 hours, the liquid is filtered out, and active silica powder is obtained after washing and drying; the mass volume ratio of silica powder, KH-560 and anhydrous ethanol is 1g:0.16g:20mL.

[0065] The preparation method of the modified additive in the composition of the waterproof topcoat includes:

[0066] a. Mix micron-sized calcium boride (CaB6, particle size 10-20 μm) and anhydrous ethanol, reflux for 0.5 h, add 3-aminopropyltriethoxysilane (KH-550), reflux for 2 h, filter to remove the liquid, wash and dry to obtain aminated calcium boride; the mass volume ratio of calcium boride, 3-aminopropyltriethoxysilane and anhydrous ethanol is 1 g:0.15 g:15 mL.

[0067] b. Mix glycidyl methacrylate (GMA) and anhydrous ethanol, stir and dissolve them thoroughly, then add calcium boronamide, the mass volume ratio of calcium boronamide, glycidyl methacrylate and anhydrous ethanol is 1g:0.28g:20mL, then reflux for 3h, filter to remove the liquid, wash and dry to obtain activated calcium boronamide;

[0068] c. Mix 4-mercaptopyridine and anhydrous ethanol, and add activated calcium boride after dissolving evenly. The mass volume ratio of activated calcium boride, 4-mercaptopyridine and anhydrous ethanol is 1g:0.12g:20mL. Stir under ultraviolet light for 1h, then filter to remove the liquid, wash and dry to obtain a modified additive.

[0069] Example 3

[0070] A basement waterproof, moisture-proof and mildew-proof construction process comprises the following steps:

[0071] Step 1: Before applying the waterproof coating, clean the walls and floors of the basement. For example, dirt such as dust, mold, and oil stains need to be cleaned up, otherwise it will affect the application effect of the coating.

[0072] Step 2: Check whether the walls and floors of the cleaned basement are flat, and promptly renovate or fill any uneven or loose areas to avoid the overall waterproofing effect being affected by the falling of concrete on the walls and floors;

[0073] Step 3: Dry the walls and floors of the basement, and then apply the spacing primer. The spacing primer is generally a buffer layer, which is thinner than the topcoat and plays a role in enhancing adhesion and buffering protection. The ingredients of the spacing primer are calculated by weight, including: 50 parts of water-based epoxy resin emulsion DER-909G, 7 parts of polyethylene glycol PGE-600, 0.8 parts of defoamer BYK-028, 1 part of leveling agent BYK-345, 25 parts of curing agent CYDHD-220 and 20 parts of deionized water. First, mix the ingredients except the curing agent in the spacing primer evenly, and then mix with the curing agent before use.

[0074] Step 4: After the interval primer has dried for 24 hours, apply waterproof topcoat on the surface of the interval primer. The topcoat needs to completely cover the primer, and the coating process needs to be uniform. It is best to complete it in one go. If necessary, it can be repeated three times. Repeated coating requires waiting for the previous coating to dry before re-coating. The ingredients of the waterproof topcoat are calculated by weight, including: 80 parts of water-based acrylic emulsion Hanhua RV-4916, 32 parts of active silica powder, 15 parts of modified additives, 1.2 parts of defoamer TEGO-902W, 1.6 parts of leveling agent BYK-333, 3 parts of film-forming agent alcohol grease 12 and 35 parts of deionized water; all the ingredients are mixed evenly before use;

[0075] Step 5. After coating, check for any missing or missing areas. After the topcoat is dry, dry and cure until it is completely cured, which takes 48 hours. This completes the construction.

[0076] Among them, the preparation process of active silica powder in the composition of waterproof topcoat includes:

[0077] Silica powder with a particle size of 10-20 μm and silane coupling agent KH-560 are mixed into anhydrous ethanol, refluxed for 6 hours, the liquid is filtered out, and active silica powder is obtained after washing and drying; the mass volume ratio of silica powder, KH-560 and anhydrous ethanol is 1g:0.32g:40mL.

[0078] The preparation method of the modified additive in the composition of the waterproof topcoat includes:

[0079] a. Mix micron-sized calcium boride (CaB6, particle size 10-20 μm) and anhydrous ethanol, reflux for 1.5 hours, add 3-aminopropyltriethoxysilane (KH-550), reflux for 6 hours, filter to remove the liquid, wash and dry to obtain aminated calcium boride; the mass volume ratio of calcium boride, 3-aminopropyltriethoxysilane and anhydrous ethanol is 1g:0.3g:35mL.

[0080] b. Mix glycidyl methacrylate (GMA) and anhydrous ethanol, stir and dissolve them thoroughly, then add calcium boronamide, the mass volume ratio of calcium boronamide, glycidyl methacrylate and anhydrous ethanol is 1g:0.56g:40mL, then reflux for 5h, filter to remove the liquid, wash and dry to obtain activated calcium boronamide;

[0081] c. Mix 4-mercaptopyridine and anhydrous ethanol, and after uniform dissolution, add activated calcium boride. The mass volume ratio of activated calcium boride, 4-mercaptopyridine and anhydrous ethanol is 1g:0.24g:40mL. Stir under ultraviolet light for 3h, then filter to remove the liquid, wash and dry to obtain a modified additive.

[0082] Comparative Example 1

[0083] A waterproof topcoat, which differs from Example 1 only in that the modified additive in the composition of the waterproof topcoat is replaced by micron-sized calcium boride, and the other components and contents remain unchanged. The components of the waterproof topcoat are calculated by weight and include: 70 parts of water-based acrylic emulsion Hanhua SX-1420, 24 parts of active silicon powder, 12 parts of micron-sized calcium boride, 0.9 parts of defoamer TEGO-901W, 1.2 parts of leveling agent BYK-381, 2 parts of film former alcohol fat 12 and 30 parts of deionized water.

[0084] Comparative Example 2

[0085] A waterproof topcoat, which differs from Example 1 only in that the modified additive in the composition of the waterproof topcoat is replaced by activated calcium boride (prepared in the same manner as in Example 1), and the other components and contents remain unchanged. The components of the waterproof topcoat are calculated by weight and include: 70 parts of water-based acrylic emulsion Hanhua SX-1420, 24 parts of active silica powder, 12 parts of activated calcium boride, 0.9 parts of defoamer TEGO-901W, 1.2 parts of leveling agent BYK-381, 2 parts of film former alcohol fat 12 and 30 parts of deionized water.

[0086] Comparative Example 3

[0087] A waterproof topcoat, which differs from Example 1 only in that the modified additive in the composition of the waterproof topcoat is replaced by a mixture of micron-sized calcium boride and 4-mercaptopyridine, and the other components and contents remain unchanged. The components of the waterproof topcoat are calculated by weight and include: 70 parts of water-based acrylic emulsion Hanhua SX-1420, 24 parts of active silicon powder, 10.17 parts of micron-sized calcium boride, 1.83 parts of 4-mercaptopyridine, 0.9 parts of defoamer TEGO-901W, 1.2 parts of leveling agent BYK-381, 2 parts of film-forming agent alcohol fat 12 and 30 parts of deionized water.

[0088] The performance of the waterproof topcoat prepared in Example 1 and Comparative Examples 1-3 was tested. The impact strength test was based on GB-T_1732-1993, the surface hardness test was based on GB / T 6739-2006, the adhesion test was based on GB / T 9286-1998, the waterproof test was based on GB / T 1733-1993, and the mildew resistance test was based on GB / T 1741-2007. The results are shown in the following table:

[0089]

[0090] It can be seen from the test results in the above table that the waterproof topcoat prepared in Example 1 of the present invention not only has high strength and hardness, but also has good waterproof and moisture-proof effects. In addition, it has excellent mildew resistance and can be well applied in the field of waterproof coatings for basements.

[0091] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms should not be understood as necessarily being directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0092] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A basement waterproof, moisture-proof and mildew-proof construction process, characterized in that: The following steps are involved: Step 1: Before applying the waterproof coating, clean the walls and floor of the basement; Step 2: Check whether the walls and floors of the cleaned basement are flat, and promptly renovate or fill any uneven or loose areas; Step 3: Dry the walls and floor of the basement, and then apply the interval primer; Step 4: After the spacer primer is dry, apply waterproof topcoat on the surface of the spacer primer; Step 5: After coating, check whether there are any defects or missed areas. After the topcoat is dry, perform curing and drying until it is completely cured. This completes the construction. In the third step, the components of the spacer primer are calculated by weight and include: 40-50 parts of waterborne epoxy resin emulsion, 3-7 parts of polyethylene glycol, 0.4-0.8 parts of a first defoamer, 0.5-1 parts of a first leveling agent, 15-25 parts of a curing agent and 10-20 parts of deionized water; In the fourth step, the components of the waterproof topcoat are calculated by weight and include: 60-80 parts of water-based acrylic emulsion, 18-32 parts of active silica powder, 10-15 parts of modifying additives, 0.6-1.2 parts of second defoaming agent, 0.8-1.6 parts of second leveling agent, 1-3 parts of film-forming agent and 25-35 parts of deionized water; The preparation method of the modified additive comprises: Step a, mixing micron-sized calcium boride and anhydrous ethanol, reflux for 0.5-1.5 hours, adding 3-aminopropyltriethoxysilane (KH-550), reflux again for 2-6 hours, then filtering to remove the liquid, washing and drying to obtain aminated calcium boride; Step b, mixing glycidyl methacrylate (GMA) and anhydrous ethanol, stirring and dissolving them, adding calcium boron amide, and then refluxing for 3-5 hours, filtering to remove the liquid, washing and drying to obtain activated calcium boron; Step c, 4-mercaptopyridine and anhydrous ethanol are mixed and dissolved uniformly, activated calcium boride is added, and the mixture is stirred under ultraviolet light for 1-3 hours, and then the liquid is removed by filtering, and the modified additive is obtained after washing and drying.

2. A basement waterproof, moisture-proof and mildew-proof construction process according to claim 1, characterized in that: The model of the water-based epoxy resin emulsion is DER-916 or DER-909G; the polyethylene glycol is one of PGE-200, PGE-400 and PGE-600.

3. A basement waterproof, moisture-proof and mildew-proof construction process according to claim 1, characterized in that: The first defoamer is one of BYK-011, BYK-024, and BYK-028; the first leveling agent is BYK-333 or BYK-345; and the curing agent is a water-based room temperature curing agent CYDHD-220.

4. A basement waterproof, moisture-proof and mildew-proof construction process according to claim 1, characterized in that: The model of the water-based acrylic emulsion is Hanhua SX-1420 or Hanhua RV-4916; the second defoamer is one of TEGO-901W, TEGO-810, and TEGO-902W; the second leveling agent is BYK-381 or BYK-333; and the film-forming agent is alcohol ester 12.

5. A basement waterproof, moisture-proof and mildew-proof construction process according to claim 1, characterized in that: The preparation process of the active silicon micropowder comprises: Silica powder with a particle size of 10-20 μm and silane coupling agent KH-560 are mixed into anhydrous ethanol, refluxed for 2-6 hours, the liquid is filtered out, and the active silica powder is obtained after washing and drying; wherein the mass volume ratio of silica powder, KH-560 and anhydrous ethanol is 1 g: (0.16-0.32) g: (20-40) mL.

6. A basement waterproof, moisture-proof and mildew-proof construction process according to claim 1, characterized in that: In the step a, the mass volume ratio of calcium boride, 3-aminopropyltriethoxysilane and anhydrous ethanol is 1 g: (0.15-0.3) g: (15-35) mL.

7. A basement waterproof, moisture-proof and mildew-proof construction process according to claim 1, characterized in that: In the step b, the mass volume ratio of calcium boroamide, glycidyl methacrylate and anhydrous ethanol is 1 g: (0.28-0.56) g: (20-40) mL.

8. The basement waterproof, moisture-proof and mildew-proof construction process according to claim 1 is characterized in that: In the step c, the mass volume ratio of activated calcium boride, 4-mercaptopyridine and anhydrous ethanol is 1 g: (0.12-0.24) g: (20-40) mL.

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