Water-based penetration crystalline waterproofing agent

Abstract

The application relates to the field of waterproofing agents, and particularly discloses a water-based permeation crystallization type waterproofing agent which comprises the following raw materials: sodium silicate, colloidal silica solution, tetra-prismatic zinc oxide whisker-polystyrene-talc powder compound and water. The tetra-prismatic zinc oxide whisker-polystyrene-talc powder compound is covered on the surface layer of concrete under the flow action generated by the permeation of the colloidal silica solution, and the pores on the surface of the concrete are blocked. On the other hand, the anchoring action is formed between the insoluble crystalline substances formed by the needle-shaped crystals of the tetra-prismatic zinc oxide whisker and the colloidal silica solution, the falling of the tetra-prismatic zinc oxide whisker-polystyrene-talc powder compound can be reduced when the tetra-prismatic zinc oxide whisker-polystyrene-talc powder compound is subjected to various factors of natural environment such as rainwater scouring and external object friction, the tetra-prismatic zinc oxide whisker-polystyrene-talc powder compound can continuously and stably play the blocking role and improve the waterproof effect, and therefore the durability of the waterproofing agent is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of waterproofing agents, more specifically, it relates to a water-based permeable crystalline waterproofing agent. BACKGROUND

[0002] Reinforced concrete is the most widely used building structure material by humans at present, and the main causes of deterioration of concrete and steel bars (physical, chemical and biological) are freeze-thaw cycles, alkali-aggregate reaction, sulfate attack, shrinkage cracking and steel bar corrosion, etc. For any one of the above deterioration processes, the causes of expansion and cracking are related to water, and water is also the carrier for the migration of aggressive media (such as chloride salts, sulfates, etc.) into concrete. Water is not only a transmission medium for destructive substances, but also a necessary condition for the occurrence of destruction and the basis for the establishment of many failure mechanisms and models. In summary of various deterioration mechanisms of concrete structures, it can be seen that almost all chemical and physical processes that affect the durability of concrete structures involve two main influencing factors, namely water and its migration in the pores and cracks of concrete.

[0003] Concrete is a porous composite material, and in hardened concrete, there are pores of different diameters, such as gel pores, capillary pores, microcracks, etc. When these pores form continuous and interconnected channels, water can easily penetrate. Therefore, how to improve the waterproof performance of the surface of concrete structures is an important aspect to consider in the development of new waterproof materials, and water-based permeable crystalline waterproof materials are one of the most widely used concrete structure surface waterproof materials at present.

[0004] For example, patent No. CN113754467A discloses an inorganic water-based permeable crystalline waterproof material, which comprises the following raw materials by weight: silicate 25-35 parts, carbonate 8-12 parts, caustic soda 1-3 parts, active alumina 0.5-1.5 parts, water-based siloxane 8-12 parts, tartaric acid 1-3 parts, sodium gluconate 1-3 parts, active silicon dioxide 1-3 parts, volcanic ash 1-3 parts, bentonite 0.5-1.5 parts, catalyst 0.1-0.3 parts, auxiliary agent 0.1-0.3 parts, and distilled water 32.7-42.7 parts.

[0005] The use of the above inorganic water-based permeable crystalline waterproof material makes the waterproof layer on the surface of the concrete vulnerable to damage and wear under the action of various factors in the natural environment such as rainwater scouring and external friction, reducing the waterproof effect of the waterproof material and making the durability poor, which needs to be improved. SUMMARY

[0006] In order to improve the durability of the waterproof material, the present application provides a water-based permeable crystalline waterproofing agent.

[0007] The water-based permeable crystalline waterproofing agent provided by the present application adopts the following technical solution:

[0008] The water-based permeable crystalline waterproofing agent comprises the following raw materials in parts by weight: 10-15 parts of sodium silicate, 35-50 parts of colloidal silica solution, 19-27 parts of four-needle-shaped zinc oxide whisker-polystyrene-talc powder composite, and 185-210 parts of water. The four-needle-shaped zinc oxide whisker-polystyrene-talc powder composite is prepared by dissolving 9-15 parts of polystyrene in 25-40 parts of toluene, stirring at room temperature in a sealed container for 20-30 minutes to form a transparent slurry, then adding 30-40 parts of talc powder and continuing to stir for 20-30 minutes, and then spray drying to obtain polystyrene-coated talc powder. The polystyrene-coated talc powder and four-needle-shaped zinc oxide whisker are mixed uniformly at a mass ratio of (2-3):1, and then subjected to impact by a vortex airflow crusher to make the four-needle-shaped zinc oxide whisker adhere to the surface of the polystyrene-coated talc powder, thereby obtaining the four-needle-shaped zinc oxide whisker-polystyrene-talc powder composite.

[0009] By adopting the above technical solution, the colloidal silica solution has good permeability. After the waterproofing agent is brushed on the surface of the concrete, the colloidal silica solution carrying the sodium silicate diffuses into the interior of the concrete through the pores on the surface of the concrete. The colloidal silica solution and the sodium silicate react with calcium hydroxide in the interior of the concrete to form a large amount of insoluble crystalline substances to block the pores of the concrete, thereby improving the impermeability of the concrete.

[0010] The four-needle-shaped zinc oxide whisker-polystyrene-talc powder composite covers the surface layer of the concrete under the flow generated by the permeation of the colloidal silica solution, blocks the pores on the surface of the concrete, avoids rainwater from entering the pores, and thereby improves the waterproofing effect of the concrete. On the other hand, the four-needle-shaped zinc oxide whisker has a three-dimensional four-needle-shaped stereoscopic structure, i.e., the whisker has a core, and four needle-shaped crystals extend radially from the core. Each needle-shaped body is a single-crystal microfiber. The four-needle-shaped zinc oxide whisker adheres to the surface of the polystyrene-coated talc powder, and the needle-shaped crystals of the four-needle-shaped zinc oxide whisker are randomly distributed on the surface of the polystyrene-coated talc powder. After the four-needle-shaped zinc oxide whisker-polystyrene-talc powder composite blocks the pores, part of the needle-shaped crystals extend into the pores and penetrate into the colloidal silica solution in the pores. After the waterproofing agent solidifies, an anchoring effect is formed between the needle-shaped crystals and the insoluble crystalline substances formed by the colloidal silica solution, thereby fixing the four-needle-shaped zinc oxide whisker-polystyrene-talc powder composite on the concrete. When the four-needle-shaped zinc oxide whisker-polystyrene-talc powder composite is subjected to various factors such as rainwater erosion, external friction, and other natural environmental factors, the falling of the four-needle-shaped zinc oxide whisker-polystyrene-talc powder composite can be reduced, so that the four-needle-shaped zinc oxide whisker-polystyrene-talc powder composite can continuously and stably play a blocking role to improve the waterproofing effect, thereby improving the durability of the waterproofing agent.

[0011] Preferably, the raw material further includes 8-17 parts by weight of redispersible latex powder.

[0012] By adopting the above technical solution, redispersible latex powder is a water-soluble latex powder. After dissolving in water, it penetrates into the pores of concrete along with the silica gel solution. When the water evaporates, it forms an elastomer that fills the pores, increasing the toughness of the bond between the tetra-needle zinc oxide whisker-polystyrene-talc composite and the concrete. This reduces the likelihood of the tetra-needle zinc oxide whisker-polystyrene-talc composite breaking or falling off from the concrete after friction, further improving the durability of the waterproofing agent.

[0013] Preferably, the raw material further includes 0.3-0.5 parts by weight of retarder.

[0014] By adopting the above technical solution, the retarder can slow down the reaction between silica gel solution and sodium silicate with calcium hydroxide, prolong the formation path of insoluble crystals in the pores, inhibit water penetration, and improve the waterproofing effect of the waterproofing agent.

[0015] Preferably, in the preparation method of the tetraneedle-zinc oxide whisker-polystyrene-talc composite, the talc is pretreated before being added. The pretreatment step involves dispersing the talc in deionized water, adding halodimethylbenzylhexadecanium, stirring at 65-75°C for 18-36 hours, repeatedly washing and drying the precipitate with deionized water to obtain a solid powder, adding triethanolamine to the solid powder and grinding it to 800-1000 mesh, then placing the talc in deionized water and stirring at 45-55°C for 3-7 hours, filtering, and drying at 100-110°C to constant weight. The weight ratio of the talc, halodimethylbenzylhexadecanium, and triethanolamine is 7:3:0.07.

[0016] By adopting the above technical solution, halodimethylbenzylhexadecanium, talc powder and deionized water are stirred together. Halodimethylbenzylhexadecanium can enter the interlayer of talc powder, expand the interlayer spacing, and perform delamination treatment on talc powder to form a single-layer structure. This allows the toluene solution of polystyrene to fully impregnate the surface of talc powder, thereby improving the coating effect of polystyrene on talc powder.

[0017] Preferably, the halo-dimethylbenzylhexadecanium is compounded from dimethylbenzylhexadecanium chloride and dimethylbenzylhexadecanium bromide in a weight ratio of (1-5):1.

[0018] Preferably, the redispersible latex powder is VAE powder.

[0019] In summary, this application has the following beneficial effects:

[0020] 1. Because this application uses a tetra-needle zinc oxide whisker-polystyrene-talc composite, the tetra-needle zinc oxide whisker-polystyrene-talc composite covers the concrete surface under the flow action generated by the penetration of the silica gel solution, blocking the pores on the concrete surface. On the other hand, the needle-shaped crystals of the tetra-needle zinc oxide whisker and the insoluble crystals formed by the silica gel solution form an anchoring effect. Under the action of various natural environmental factors such as rainwater erosion and external friction, the shedding of the tetra-needle zinc oxide whisker-polystyrene-talc composite can be reduced, so that the tetra-needle zinc oxide whisker-polystyrene-talc composite can continuously and stably play a blocking role to improve the waterproofing effect, thereby improving the durability of the waterproofing agent.

[0021] 2. In this application, redispersible latex powder is preferably used. After the redispersible latex powder dissolves in water, it penetrates into the pores of the concrete along with the silica gel solution. When the water evaporates, it forms an elastomer that fills the pores, increasing the toughness of the bond between the tetra-needle zinc oxide whisker-polystyrene-talc composite and the concrete. This reduces the likelihood of the tetra-needle zinc oxide whisker-polystyrene-talc composite breaking or falling off from the concrete after being rubbed, further improving the durability of the waterproofing agent. Detailed Implementation

[0022] The present application will be further described in detail below with reference to the embodiments.

[0023] Raw materials Source Silica colloidal solution Silica content: 30-40 wt% Four acicular zinc oxide whiskers Model: SS-ZJ52 Polystyrene Grade: GP525 Talc powder Mesh: 2000 mesh Retarder Sodium citrate

[0024] Unless otherwise specified, all raw materials used in the following embodiments are commercially available.

[0025] Example of raw material preparation

[0026] Preparation Example 1

[0027] Preparation of tetra-needle zinc oxide whisker-polystyrene-talc composite: 90g of polystyrene was dissolved in 250g of toluene and stirred at 200r / min for 30min in a sealed container at room temperature to form a transparent slurry. Then, 300g of talc was added and stirred for another 30min. After spray drying, polystyrene-coated talc was obtained. The polystyrene-coated talc and tetra-needle zinc oxide whiskers were mixed evenly at a mass ratio of 2:1 and then subjected to impact by a vortex airflow pulverizer to make the tetra-needle zinc oxide whiskers adhere to the surface of the polystyrene-coated talc, thus obtaining the tetra-needle zinc oxide whisker-polystyrene-talc composite.

[0028] Preparation Example 2

[0029] Preparation of the tetrapod-shaped zinc oxide whisker-polystyrene-talcum powder composite: 150 g of polystyrene was dissolved in 400 g of toluene, and stirred at a speed of 300 r / min for 20 min at room temperature in a closed container to form a transparent slurry, and then 400 g of talcum powder was added and stirred for another 20 min, and then spray dried to obtain talcum powder coated with polystyrene. Then, the talcum powder coated with polystyrene and tetrapod-shaped zinc oxide whiskers were mixed uniformly at a mass ratio of 3:1, and then impacted by a vortex airflow crusher to make the tetrapod-shaped zinc oxide whiskers adhere to the surface of the talcum powder coated with polystyrene, thereby obtaining the tetrapod-shaped zinc oxide whisker-polystyrene-talcum powder composite.

[0030] Preparation Example 3

[0031] Preparation of the tetrapod-shaped zinc oxide whisker-polystyrene-talcum powder composite: 120 g of polystyrene was dissolved in 320 g of toluene, and stirred at a speed of 250 r / min for 25 min at room temperature in a closed container to form a transparent slurry, and then 350 g of talcum powder was added and stirred for another 25 min, and then spray dried to obtain talcum powder coated with polystyrene. Then, the talcum powder coated with polystyrene and tetrapod-shaped zinc oxide whiskers were mixed uniformly at a mass ratio of 2:1, and then impacted by a vortex airflow crusher to make the tetrapod-shaped zinc oxide whiskers adhere to the surface of the talcum powder coated with polystyrene, thereby obtaining the tetrapod-shaped zinc oxide whisker-polystyrene-talcum powder composite.

[0032] Preparation Example 4

[0033] Preparation of the tetrapod-shaped zinc oxide whisker-polystyrene-talcum powder composite: The talcum powder was pretreated. The pretreatment steps were as follows: the talcum powder was dispersed in deionized water, and then halogen dimethyl benzyl hexadecyl ammonium was added, and stirred at a speed of 200 r / min for 36 h at 65 ℃. The precipitate was repeatedly washed with deionized water and dried to obtain a solid powder. Then, triethanolamine was added to the solid powder, and ground to 800 mesh. Then, the talcum powder was placed in deionized water, and stirred at a speed of 200 r / min for 7 h at 45 ℃. After filtration, the talcum powder was dried at 100 ℃ to a constant weight. The weight ratio of the talcum powder, halogen dimethyl benzyl hexadecyl ammonium and triethanolamine was 7:3:0.07. The halogen dimethyl benzyl hexadecyl ammonium was compounded by dimethyl benzyl hexadecyl ammonium chloride and dimethyl benzyl hexadecyl ammonium bromide at a weight ratio of 1:1.

[0034] The 90g polystyrene was dissolved in 250g of toluene, stirred at 200r / min for 30min at room temperature in a closed container to form a transparent slurry, then 300g of pretreated talc powder was added and stirred for another 30min, and then spray dried to obtain polystyrene-coated talc powder. Then the polystyrene-coated talc powder and the four-needle zinc oxide whiskers were mixed uniformly at a mass ratio of 2:1, and the four-needle zinc oxide whiskers were adhered to the surface of the polystyrene-coated talc powder by impacting with a vortex airflow crusher, thereby preparing a four-needle zinc oxide whisker-polystyrene-talc powder composite.

[0035] Preparation Example 5

[0036] Preparation of the four-needle zinc oxide whisker-polystyrene-talc powder composite: The talc powder was pretreated. The pretreatment steps were as follows: the talc powder was dispersed in deionized water, then halogen dimethyl benzyl hexadecyl ammonium was added, stirred at 200r / min for 18h at 75℃, the precipitate was washed repeatedly with deionized water and dried to obtain a solid powder, then triethanolamine was added and ground to 1000 mesh, then the talc powder was placed in deionized water, stirred at 200r / min for 3h at 55℃, and then dried at 110℃ to constant weight after suction filtration. The weight ratio of talc powder, halogen dimethyl benzyl hexadecyl ammonium and triethanolamine was 7:3:0.07. The halogen dimethyl benzyl hexadecyl ammonium was compounded by chlorinated dimethyl benzyl hexadecyl ammonium and brominated dimethyl benzyl hexadecyl ammonium at a weight ratio of 5:1.

[0037] The 150g polystyrene was dissolved in 400g of toluene, stirred at 300r / min for 20min at room temperature in a closed container to form a transparent slurry, then 400g of pretreated talc powder was added and stirred for another 20min, and then spray dried to obtain polystyrene-coated talc powder. Then the polystyrene-coated talc powder and the four-needle zinc oxide whiskers were mixed uniformly at a mass ratio of 3:1, and the four-needle zinc oxide whiskers were adhered to the surface of the polystyrene-coated talc powder by impacting with a vortex airflow crusher, thereby preparing a four-needle zinc oxide whisker-polystyrene-talc powder composite.

[0038] Preparation Example 6

[0039] Preparation of tetrapod-shaped zinc oxide whisker-polystyrene-talc powder composite: The talc powder was pretreated by dispersing it in deionized water, then halogen dimethyl benzyl hexadecyl ammonium was added, stirring at 200 r / min for 24 h at 70℃, the precipitate was washed repeatedly with deionized water, dried to obtain a solid powder, then triethanolamine was added and ground to 900 mesh, the talc powder was then placed in deionized water, stirring at 200 r / min for 5 h at 50℃, then filtered and dried at 105℃ to constant weight, the weight ratio of talc powder, halogen dimethyl benzyl hexadecyl ammonium and triethanolamine was 7:3:0.07, the halogen dimethyl benzyl hexadecyl ammonium was compounded from chlorinated dimethyl benzyl hexadecyl ammonium and brominated dimethyl benzyl hexadecyl ammonium at a weight ratio of 3:1.

[0040] 120 g of polystyrene was dissolved in 320 g of toluene, stirring at 250 r / min for 25 min at room temperature in a sealed container to form a transparent slurry, then 350 g of pretreated talc powder was added and stirring was continued for 25 min, then spray drying was performed to obtain polystyrene-coated talc powder, then the polystyrene-coated talc powder was mixed with tetrapod-shaped zinc oxide whiskers at a mass ratio of 2:1, and the mixture was impacted by a vortex airflow crusher to make the tetrapod-shaped zinc oxide whiskers adhere to the surface of the polystyrene-coated talc powder, thereby preparing a tetrapod-shaped zinc oxide whisker-polystyrene-talc powder composite.

[0041] Example

[0042] Example 1

[0043] The present application discloses a water-based penetration crystalline waterproofing agent, comprising the following raw materials: sodium silicate, colloidal silica solution, tetrapod-shaped zinc oxide whisker-polystyrene-talc powder composite and water, the tetrapod-shaped zinc oxide whisker-polystyrene-talc powder composite is prepared by Preparation Example 1, the waterproofing agent is prepared by stirring and uniformly mixing the above-mentioned raw materials, and the content of each component is shown in Table 1-1.

[0044] Example 2

[0045] The present application discloses a water-based penetration crystalline waterproofing agent, comprising the following raw materials: sodium silicate, colloidal silica solution, tetrapod-shaped zinc oxide whisker-polystyrene-talc powder composite and water, the tetrapod-shaped zinc oxide whisker-polystyrene-talc powder composite is prepared by Preparation Example 2, the waterproofing agent is prepared by stirring and uniformly mixing the above-mentioned raw materials, and the content of each component is shown in Table 1-1.

[0046] Example 3

[0047] The application discloses a water-based permeable crystalline waterproofing agent, which comprises the following raw materials: sodium silicate, colloidal silica solution, tetra-prismatic zinc oxide whisker-polystyrene-talc powder compound and water, the tetra-prismatic zinc oxide whisker-polystyrene-talc powder compound is prepared from Preparation Example 3, the waterproofing agent is prepared by stirring and uniformly mixing the above raw materials, and the content of each component is shown in Table 1-1.

[0048] Example 4

[0049] The difference from Example 1 is that redispersible latex powder is added into the raw materials, and the content of each component is shown in Table 1-1.

[0050] Example 5

[0051] The difference from Example 1 is that a retarder is added into the raw materials, and the content of each component is shown in Table 1-1.

[0052] Example 6

[0053] The difference from Example 1 is that the tetra-prismatic zinc oxide whisker-polystyrene-talc powder compound is prepared from Preparation Example 4, and the content of each component is shown in Table 1-1.

[0054] Example 7

[0055] The application discloses a water-based permeable crystalline waterproofing agent, which comprises the following raw materials: sodium silicate, colloidal silica solution, tetra-prismatic zinc oxide whisker-polystyrene-talc powder compound, water, redispersible latex powder and retarder, the tetra-prismatic zinc oxide whisker-polystyrene-talc powder compound is prepared from Preparation Example 4, the waterproofing agent is prepared by stirring and uniformly mixing the above raw materials, and the content of each component is shown in Table 1-2.

[0056] Example 8

[0057] The application discloses a water-based permeable crystalline waterproofing agent, which comprises the following raw materials: sodium silicate, colloidal silica solution, tetra-prismatic zinc oxide whisker-polystyrene-talc powder compound, water, redispersible latex powder and retarder, the tetra-prismatic zinc oxide whisker-polystyrene-talc powder compound is prepared from Preparation Example 5, the waterproofing agent is prepared by stirring and uniformly mixing the above raw materials, and the content of each component is shown in Table 1-2.

[0058] Example 9

[0059] The application discloses a water-based permeable crystalline waterproofing agent, which comprises the following raw materials: sodium silicate, colloidal silica solution, tetra-prismatic zinc oxide whisker-polystyrene-talc powder compound, water, redispersible latex powder and retarder, the tetra-prismatic zinc oxide whisker-polystyrene-talc powder compound is prepared from Preparation Example 6, the waterproofing agent is prepared by stirring and uniformly mixing the above raw materials, and the content of each component is shown in Table 1-2.

[0060] Comparative Example 1

[0061] Comparative Example 1

[0062] The difference from Example 1 is that the waterproofing agent of the four-needle-shaped zinc oxide whisker-polystyrene-talc powder composite is replaced by a waterproofing agent of talc as a blank control group.

[0063] Comparative Example 2

[0064] The difference from Example 1 is that the four-needle-shaped zinc oxide whisker-polystyrene-talc powder composite is replaced by four-needle-shaped zinc oxide whiskers, and the content of each component is shown in Table 1-2.

[0065] Comparative Example 3

[0066] The difference from Example 1 is that the four-needle-shaped zinc oxide whisker-polystyrene-talc powder composite is replaced by a mixture of talc and four-needle-shaped zinc oxide whiskers with a mass ratio of 2:1, and the content of each component is shown in Table 1-2.

[0067] Table 1-1 Component Content Table (unit: g)

[0068]

[0069] Table 1-2 Component Content Table (unit: g)

[0070]

[0071]

[0072] Performance Test

[0073] The waterproofing agents prepared in Examples 1-9 and Comparative Examples 1-3 were determined for initial impermeability according to the standard JC / T 1018-2020 "Water-based permeable inorganic waterproofing agent".

[0074] The test samples were prepared according to the method in Chapter 7.9.3 of the standard JC / T 1018-2020 "Water-based permeable inorganic waterproofing agent", and then the waterproofing agents prepared in Examples 1-4, 6-9 and Comparative Examples 1-3 were coated on the surface of each test sample. After standing at room temperature for 48 h, the surface of the test sample coated with the waterproofing agent was placed under flowing deionized water, so that the deionized water washed the surface of the test sample coated with the waterproofing agent. The flow rate of the deionized water was 6 L / min, and after washing for 12 h, the test sample was determined for post-test impermeability according to the standard JC / T 1018-2020 "Water-based permeable inorganic waterproofing agent". The test results are shown in Table 2.

[0075] Table 2 Test Results of Each Example and Comparative Example

[0076]

[0077]

[0078] In summary, the following conclusions can be drawn:

[0079] 1. It can be seen from the combination of Examples 1-3 and Comparative Examples 1-3 and Table 2 that the addition of the four-needle-shaped zinc oxide whisker-polystyrene-talc powder composite to the raw materials of the waterproofing agent can improve the durability of the waterproofing agent, and the reason may be that the four-needle-shaped zinc oxide whisker has a three-dimensional four-needle-shaped structure, the four-needle-shaped zinc oxide whisker adheres to the surface of the talc powder coated with polystyrene, the needle-shaped crystals of the four-needle-shaped zinc oxide whisker are randomly distributed on the surface of the talc powder coated with polystyrene, and after the waterproofing agent is solidified, an anchoring effect is formed between the needle-shaped crystals and the insoluble crystalline material formed by the colloidal solution of silicon dioxide, realizing the fixation of the four-needle-shaped zinc oxide whisker-polystyrene-talc powder composite on the concrete, and when subjected to various factors such as rainwater erosion and external friction in the natural environment, the four-needle-shaped zinc oxide whisker-polystyrene-talc powder composite can reduce the falling off, so that the four-needle-shaped zinc oxide whisker-polystyrene-talc powder composite can continuously and stably play a blocking role to improve the waterproofing effect, thereby improving the durability of the waterproofing agent.

[0080] 2. It can be seen from the combination of Examples 1 and 4 that the addition of the redispersible latex powder to the raw materials of the waterproofing agent can improve the durability of the waterproofing agent, and the reason may be that the redispersible latex powder dissolves in water and penetrates into the pores of the concrete along with the colloidal solution of silicon dioxide, and when the water evaporates, an elastomer is formed to fill in the pores, increasing the toughness of the connection between the four-needle-shaped zinc oxide whisker-polystyrene-talc powder composite and the concrete, and reducing the fracture and falling off between the four-needle-shaped zinc oxide whisker-polystyrene-talc powder composite and the concrete after being rubbed, thereby improving the durability of the waterproofing agent.

[0081] 3. It can be seen from the combination of Examples 1 and 5 that the addition of the coagulant to the raw materials of the waterproofing agent is beneficial to improving the waterproofing effect of the waterproofing agent, and the reason may be that the retarder can slow down the reaction between the colloidal solution of silicon dioxide and sodium silicate and calcium hydroxide, prolong the formation path of the insoluble crystalline material in the pores, and inhibit the penetration of water, thereby improving the waterproofing effect of the waterproofing agent.

[0082] The specific embodiments are merely an explanation of the present application, and are not a limitation of the present application. Those skilled in the art can make modifications to the embodiments without creative contribution after reading the present specification, and the modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. An aqueous permeation crystalline waterproofing agent, characterized by, The raw materials include the following weight parts: 10-15 parts of sodium silicate, 35-50 parts of colloidal silica solution, 19-27 parts of tetrapod-shaped zinc oxide whisker-polystyrene-talc powder composite, 185-210 parts of water, 8-17 parts of redispersible latex powder, and 0.3-0.5 parts of retarder, and the preparation method of the tetrapod-shaped zinc oxide whisker-polystyrene-talc powder composite is as follows: talc powder is pretreated, the pretreatment step is that the talc powder is dispersed in deionized water, then halogen dimethyl benzyl hexadecyl ammonium is added, stirring is carried out at 65-75 DEG C for 18-36 h, the precipitate is repeatedly washed with deionized water, dried to obtain a solid powder, triethanolamine is added to the solid powder, and the solid powder is ground to 800-1000 mesh, then the talc powder is placed in deionized water, stirring is carried out at 45-55 DEG C for 3-7 h, and the talc powder is dried at 100-110 DEG C to constant weight after suction filtration, and the weight ratio of the talc powder, halogen dimethyl benzyl hexadecyl ammonium and triethanolamine is 7:3:0.07; 9-15 parts of polystyrene are dissolved in 25-40 parts of toluene, stirring is carried out at room temperature in a closed container for 20-30 min to form a transparent slurry, then 30-40 parts of the pretreated talc powder is added and stirring is continued for 20-30 min, and then spray drying is carried out to obtain polystyrene-coated talc powder, then the polystyrene-coated talc powder with a mass ratio of (2-3):1 is mixed with tetrapod-shaped zinc oxide whisker, and the mixture is impacted by a vortex airflow crusher to make the tetrapod-shaped zinc oxide whisker adhere to the surface of the polystyrene-coated talc powder, thereby obtaining the tetrapod-shaped zinc oxide whisker-polystyrene-talc powder composite.

2. The water-based osmotic crystalline waterproofing agent according to claim 1, characterized by: The halogen dimethyl benzyl hexadecyl ammonium is compounded from chlorinated dimethyl benzyl hexadecyl ammonium and brominated dimethyl benzyl hexadecyl ammonium at a weight ratio of (1-5):

1.

3. The water-based penetration crystalline waterproofing agent according to claim 1, characterized by: The redispersible latex powder is VAE glue powder.

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