Preparation process of waterproof, anti-corrosion and anti-seepage concrete

Abstract

The invention belongs to the technical field of building materials, and particularly relates to a preparation process of waterproof, anti-corrosion and anti-seepage concrete. The main aggregate of the concrete is compounded, meanwhile, functional components such as the silicon dioxide modified agave fiber, the cement composite material and the allophane are introduced, the waterproof, anti-corrosion and anti-seepage concrete is prepared, through the synergistic effect of the multiple components, the water absorption rate of the concrete is effectively reduced, the compressive strength is improved, and the waterproof, anti-corrosion and anti-seepage effects are achieved. Meanwhile, good anti-permeability performance is obtained.

Description

Technical Field

[0001] The invention belongs to the technical field of building materials, and in particular relates to a preparation process of waterproof, anti-corrosion and anti-seepage concrete. Background Art

[0002] Concrete is one of the most important civil engineering materials in contemporary times. It is an artificial stone made of cementitious materials, granular aggregates (also called aggregates), water, and admixtures and additives added in a certain proportion, which are uniformly stirred, compacted, and cured and hardened. In addition, according to different usage requirements, some chemical additives may be added to improve its performance, such as accelerating or delaying the setting time, increasing strength or workability, etc. Concrete has good plasticity and can be made into various shapes according to the mold. It also has high compressive strength.

[0003] A Chinese patent (publication number CN116553886B) discloses a crack-resistant waterproof concrete and a preparation method thereof. The application adopts modified polypropylene fiber and active powder as crack-resistant agents. The active powder can alleviate the hydration heat, reduce the possibility of temperature cracks, and improve the workability reduction caused by adding modified polypropylene fiber, improve the density inside the concrete, improve the impermeability of the concrete, and reduce the overall micro cracks in the later stage; the modified polypropylene fiber is randomly distributed inside the concrete, inhibits the cracking of the concrete, reduces the stress concentration coefficient at the end of the internal crack, and improves the crack resistance and impermeability. However, the patent does not solve the problems of high water absorption, low impermeability pressure, and insufficient compressive strength of concrete in the prior art, which seriously affects its actual use.

[0004] Therefore, how to screen the appropriate proportion of aggregate components and introduce various functional ingredients to reduce the water absorption of concrete, improve the compressive strength, and obtain good anti-seepage performance has become a direction that needs to be focused on. Summary of the invention

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a preparation process for waterproof, anti-corrosion and anti-seepage concrete, aiming to solve the problems of high water absorption, low anti-seepage pressure and insufficient compressive strength of concrete in the prior art.

[0006] The present invention prepares waterproof, anti-corrosion and anti-seepage concrete by compounding the main aggregate of concrete and introducing functional components such as silica-modified agave fiber, cement composite material and hydrophobic stone. Through the synergistic effect of multiple components, the water absorption rate of concrete is effectively reduced, the compressive strength is improved, and good anti-seepage performance is obtained.

[0007] The technical solution adopted by the present invention to solve the above technical problems is as follows:

[0008] The present invention provides a preparation process of waterproof, anti-corrosion and anti-seepage concrete, comprising the following steps:

[0009] Step S1: in parts by weight, 80 to 100 parts of anhydrous ethanol and 20 to 24 parts of deionized water are mixed evenly, then 2 to 6 parts of 3-aminopropyltriethoxysilane are added and stirred for 40 to 60 minutes, the pH is adjusted to 4.6 to 4.8 with glacial acetic acid, and then 6 to 8 parts of agave fiber are added and immersed for 2 to 4 hours, and dried after the immersion is completed to obtain modified agave fiber; 2 to 4 parts of silicon dioxide are added to 180 to 200 parts of deionized water and stirred for 30 to 40 minutes, and then ultrasonically vibrated to obtain a silicon dioxide dispersion; 6 to 8 parts of the modified agave fiber are immersed in 180 to 200 parts of the silicon dioxide dispersion for 6 to 8 hours, and vacuum dried to obtain silicon dioxide modified agave fiber;

[0010] Step S2: by weight, 280-300 parts of coarse aggregate, 200-240 parts of fine aggregate, 100-120 parts of cement, 20-30 parts of silica-modified agave fiber, 10-14 parts of allophane and 240-260 parts of deionized water are mixed and stirred for 20-30 minutes, and then allowed to stand for 16-20 minutes to obtain a mixture;

[0011] Step S3: by weight, add 4 to 6 parts of water reducing agent and 6 to 10 parts of penetrant into 760 to 800 parts of the mixture, stir for 10 to 20 minutes, pour into a mold, demold and maintain after solidification to obtain waterproof, anti-corrosion and anti-seepage concrete.

[0012] As a preferred technical solution of the present invention, the conditions of the ultrasonic oscillation treatment include: power of 500-600W and time of 30-50min.

[0013] Silica-modified agave fibers can be evenly distributed in concrete through the deposition of nano-silicon dioxide, so that they can transfer and disperse the stress on the concrete during the force-bearing process, inhibit the development of cracks, reduce the probability of corrosive ions in the environment penetrating into the concrete during the service of the concrete, and significantly improve the concrete's anti-seepage and anti-corrosion effects.

[0014] As a preferred technical solution of the present invention, the coarse aggregate is granite and limestone; the mass ratio of granite to limestone in the coarse aggregate is (1-2):1.

[0015] The coarse aggregate of the present invention is granite and limestone, and by controlling the mass ratio of granite and limestone, a good compounding effect is obtained, the water absorption rate of concrete is reduced, the compressive strength is increased, and the anti-seepage pressure is increased.

[0016] As a preferred technical solution of the present invention, the fine aggregate is selected from any one of quartz sand, river sand, and machine-made sand, or a combination of at least two of them.

[0017] As a preferred technical solution of the present invention, the water reducer is selected from any one of polycarboxylate water reducer, melamine water reducer and naphthalene water reducer or a combination of at least two thereof.

[0018] As a preferred technical solution of the present invention, the penetrant is selected from any one of lauryl alcohol polyoxyethylene ether, nonylphenol polyoxyethylene ether, and fatty alcohol polyoxyethylene ether, or a combination of at least two thereof.

[0019] As a preferred technical solution of the present invention, the cement is a cement composite material; the preparation method of the cement composite material comprises: adding 2 to 4 parts of polyvinyl pyrrolidone to 100 to 110 parts of deionized water by weight and stirring evenly, then adding 4 to 8 parts of carboxylated graphene and ultrasonically dispersing for 50 to 60 minutes to obtain a graphene suspension; mixing 100 to 110 parts of the graphene suspension and 130 to 140 parts of sulphoaluminate cement for 6 to 8 minutes, drying, and crushing to obtain a cement composite material.

[0020] As a preferred technical solution of the present invention, the preparation method of the carboxylated graphene includes: adding 2 to 6 parts of graphene oxide to 400 to 500 parts of deionized water by weight, ultrasonically dispersing for 50 to 60 minutes, then adding 6 to 10 parts of sodium hydroxide and 16 to 20 parts of azobisisobutyronitrile and ultrasonically dispersing for 30 to 40 minutes, reacting at 30 to 34° C. for 4 to 6 hours, washing with water, and drying to obtain carboxylated graphene.

[0021] As a preferred technical solution of the present invention, the particle size of the sulphoaluminate cement is 20 to 200 μm.

[0022] Carboxylated graphene is introduced into cement composites. Carboxylated graphene has a very large specific surface area and excellent lamellar barrier properties, which helps to form a microscopic physical barrier, reducing the channels for moisture to enter the interior of the concrete, thereby effectively reducing the water absorption rate of the concrete.

[0023] As a preferred technical solution of the present invention, the preparation method of the allophane comprises: in parts by weight, 180 to 200 parts of an aluminum chloride aqueous solution with a molar concentration of 0.1 mol / L and 180 to 200 parts of a sodium silicate aqueous solution with a molar concentration of 0.15 mol / L are mixed and stirred for 60 to 80 minutes, centrifuged to remove the supernatant to obtain a white gel, washed the white gel with deionized water, and freeze-dried to obtain an intermediate; 100 to 120 parts of the intermediate are added to 260 to 300 parts of a sodium silicate aqueous solution with a mass concentration of 20 % sulfuric acid solution for 4 to 6 hours, filtered, washed and dried to obtain an acidified product; 10 to 14 parts of the acidified product, 4 to 6 parts of hexadecyltrimethylammonium bromide and 1 to 3 parts of sodium hydroxide are added to 280 to 300 parts of deionized water, stirred at 60 to 70° C. for 2 to 4 hours, then transferred to a microwave reactor for microwave treatment (power of 700 to 800 W, temperature of 100 to 110° C., time of 60 to 80 min), cooled after the microwave treatment, filtered, washed and dried to obtain hydroalophane.

[0024] Allophane can act as a fine filler in concrete mixtures, filling the gaps between cement particles. This effect not only reduces porosity but also makes the concrete more dense, thereby improving its compressive strength and durability.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] (1) The hydrophobic material of the present invention introduces hexadecyltrimethylammonium bromide, which, as a quaternary ammonium salt cationic modifier, can be combined with the silica-modified agave fiber and the cement composite material through electrostatic action. At the same time, the amino groups contained in the silica-modified agave fiber react with the carboxyl groups in the cement composite material, thereby forming a complex interconnected structure in the matrix of the concrete, effectively reducing the water absorption rate, while improving the compressive strength and obtaining good anti-seepage performance.

[0027] (2) Carboxylated graphene is introduced into the cement composite material of the present invention. Carboxylated graphene has a very large specific surface area and excellent sheet barrier properties, which helps to form a microscopic physical barrier, reduce the channels for moisture to enter the interior of the concrete, and thus effectively reduce the water absorption rate of the concrete.

[0028] (3) The silica-modified agave fibers of the present invention can be evenly distributed in concrete through the deposition of nano-silicon dioxide, so that the modified agave fibers can transfer and disperse the stress on the concrete during the stress process, inhibit the development of cracks, and reduce the probability of corrosive ions in the environment penetrating into the concrete during the service of the concrete, thereby significantly improving the anti-seepage and anti-corrosion effects of the concrete.

[0029] (4) The allophane of the present invention can act as a fine filler in the concrete mixture, filling the gaps between cement particles. This effect can not only reduce the porosity, but also make the concrete more compact, thereby improving its compressive strength. DETAILED DESCRIPTION

[0030] For the convenience of understanding the present invention, the present invention lists the following embodiments. It should be understood by those skilled in the art that the embodiments are only to help understand the present invention and should not be regarded as specific limitations of the present invention.

[0031] The sources of some components in the embodiments and comparative examples are as follows:

[0032] Granite, item number LKS03, purchased from Shandong Bolero Stone Co., Ltd.;

[0033] Limestone, model 002, purchased from Shandong Zhanfei Building Materials Co., Ltd.;

[0034] Quartz sand, item number sjz139, was purchased from Shijiazhuang Tourmaline Mineral Products Co., Ltd.;

[0035] River sand, item number 5768, was purchased from Lingshou County Zehong Mineral Products Processing Plant;

[0036] Sulphoaluminate cement I, with an average particle size of 20 μm, was purchased from Sanxiang Special Cement Company;

[0037] Sulphoaluminate cement II, with an average particle size of 4 mm, was purchased from Hubei Yicheng Anda Special Cement Co., Ltd.;

[0038] Agave fiber, purchased from Vinmexco, California, USA;

[0039] Silicon dioxide, catalog number zkky7767653-0135, was purchased from Beijing Zhongke Keyou Technology Co., Ltd.;

[0040] Polycarboxylate water reducer, model ZWL-A-Ⅸ, purchased from Zhejiang Wulong Chemical Co., Ltd.;

[0041] Melamine water reducing agent, model VF-8, purchased from Shanghai Luke Chemical Co., Ltd.;

[0042] Naphthalene-based water reducer, model SNF-A, purchased from Shenyang Xingzhenghe Chemical Co., Ltd.;

[0043] Lauryl alcohol polyoxyethylene ether, CAS No. 9002-92-0, was purchased from Sinopharm Chemical Reagent Co., Ltd.;

[0044] Nonylphenol polyoxyethylene ether, CAS No. 9016-45-9, purchased from Sinopharm Chemical Reagent Co., Ltd.;

[0045] Fatty alcohol polyoxyethylene ether, CAS No. 68131-39-5, purchased from Shanghai MacLean Biochemical Technology Co., Ltd.;

[0046] Anhydrous ethanol, CAS No. 64-17-5, was purchased from Sinopharm Chemical Reagent Co., Ltd.;

[0047] 3-Aminopropyltriethoxysilane, CAS No. 919-30-2, purchased from Shanghai MacLean Biochemical Technology Co., Ltd.;

[0048] Graphene oxide, model DN-20DY, was purchased from Zhejiang Zhiti Nano Micro New Materials Co., Ltd.

[0049] Azobisisobutyronitrile, CAS No. 78-67-1, purchased from Shanghai Aladdin Biochemical Technology Co., Ltd.;

[0050] Polyvinyl pyrrolidone, product number S30267, was purchased from Shanghai Yuanye Biotechnology Co., Ltd.;

[0051] Aluminum chloride, CAS No. 7784-13-6, was purchased from Sinopharm Chemical Reagent Co., Ltd.;

[0052] Sodium silicate, CAS No. 13517-24-3, was purchased from Sinopharm Chemical Reagent Co., Ltd.;

[0053] Sulfuric acid, CAS No. 7664-93-9, was purchased from Sinopharm Chemical Reagent Co., Ltd.;

[0054] Hexadecyltrimethylammonium bromide, CAS No. 57-09-0; purchased from Shanghai Aladdin Biochemical Technology Co., Ltd.;

[0055] Sodium hydroxide, CAS No. 1310-73-2, was purchased from Sinopharm Chemical Reagent Co., Ltd.

[0056] Preparation of cement composite material: (1) By weight, 6 parts of graphene oxide were added to 500 parts of deionized water, ultrasonically dispersed for 60 minutes, then 10 parts of sodium hydroxide and 20 parts of azobisisobutyronitrile were added and ultrasonically dispersed for 40 minutes, reacted at 34°C for 4 hours, washed with water, and dried to obtain carboxylated graphene. (2) By weight, 4 parts of polyvinyl pyrrolidone were added to 110 parts of deionized water and stirred evenly, then 8 parts of carboxylated graphene were added and ultrasonically dispersed for 60 minutes to obtain a graphene suspension; 110 parts of the graphene suspension and 140 parts of sulphoaluminate cement I (average particle size of 20 μm) were mixed and stirred for 8 minutes, dried, and crushed to obtain a cement composite material.

[0057] Preparation of allophane: In parts by weight, 200 parts of an aluminum chloride aqueous solution with a molar concentration of 0.1 mol / L and 200 parts of a sodium silicate aqueous solution with a molar concentration of 0.15 mol / L are mixed and stirred for 80 minutes, and the supernatant is removed by centrifugation to obtain a white gel, and the white gel is washed with deionized water, and freeze-dried to obtain an intermediate; 120 parts of the intermediate are added to 300 parts of a sulfuric acid solution with a mass concentration of 20%, and immersed for 6 hours, filtered, washed, and dried to obtain an acidified product; 14 parts of the acidified product, 6 parts of hexadecyltrimethylammonium bromide, and 3 parts of sodium hydroxide are added to 300 parts of deionized water, stirred at 70°C for 2 hours, and then transferred to a microwave reactor for microwave treatment (power of 800 W, temperature of 110°C, time of 60 minutes), and after the microwave treatment is completed, cooled, filtered, washed, and dried to obtain allophane.

[0058] Example 1

[0059] This embodiment provides a preparation process of waterproof, anti-corrosion and anti-seepage concrete, comprising the following steps:

[0060] Step S1: In parts by weight, 100 parts of anhydrous ethanol and 24 parts of deionized water are mixed evenly, and then 6 parts of 3-aminopropyltriethoxysilane are added and stirred for 60 minutes, the pH is adjusted to 4.8 with glacial acetic acid, and then 8 parts of agave fiber are added and immersed for 4 hours, and dried after the immersion is completed to obtain modified agave fiber; 4 parts of silicon dioxide are added to 200 parts of deionized water and stirred for 40 minutes, and then ultrasonically shaken (power is 600 W, time is 30 minutes) to obtain a silicon dioxide dispersion; 8 parts of the modified agave fiber are immersed in 200 parts of the silicon dioxide dispersion for 8 hours, and vacuum dried to obtain silicon dioxide modified agave fiber;

[0061] Step S2: In parts by weight, 300 parts of coarse aggregate (200 parts of granite and 100 parts of limestone), 240 parts of fine aggregate quartz sand, 120 parts of cement composite material, 30 parts of silica-modified agave fiber, 14 parts of hydrophobic stone and 260 parts of deionized water are mixed and stirred for 30 minutes, and then allowed to stand for 20 minutes to obtain a mixture;

[0062] Step S3: by weight, add 6 parts of polycarboxylic acid water-reducing agent and 10 parts of penetrant lauryl alcohol polyoxyethylene ether to 800 parts of the mixture and stir for 20 minutes, pour into a mold, demold and maintain after solidification to obtain waterproof, anti-corrosion and anti-seepage concrete.

[0063] Example 2

[0064] This embodiment provides a preparation process of waterproof, anti-corrosion and anti-seepage concrete, comprising the following steps:

[0065] Step S1: In parts by weight, 80 parts of anhydrous ethanol and 20 parts of deionized water are mixed evenly, and then 2 parts of 3-aminopropyltriethoxysilane are added and stirred for 40 minutes, the pH is adjusted to 4.6 with glacial acetic acid, and then 6 parts of agave fiber are added and immersed for 2 hours, and dried after the immersion is completed to obtain modified agave fiber; 2 parts of silicon dioxide are added to 180 parts of deionized water and stirred for 30 minutes, and then ultrasonically shaken (power is 500W, time is 50 minutes) to obtain a silicon dioxide dispersion; 6 parts of the modified agave fiber are immersed in 180 parts of the silicon dioxide dispersion for 6 hours, and vacuum dried to obtain silicon dioxide modified agave fiber;

[0066] Step S2: In parts by weight, 280 parts of coarse aggregate (140 parts of granite and 140 parts of limestone), 200 parts of fine aggregate river sand, 100 parts of cement composite material, 20 parts of silica-modified agave fiber, 10 parts of hydrophobic stone and 240 parts of deionized water are mixed and stirred for 20 minutes, and then allowed to stand for 16 minutes to obtain a mixture;

[0067] Step S3: In parts by weight, 4 parts of water reducing agent melamine water reducing agent and 6 parts of penetrant nonylphenol polyoxyethylene ether are added to 760 parts of the mixture, stirred for 10 minutes, poured into a mold, and demolded and cured after solidification to obtain waterproof, anti-corrosion and anti-seepage concrete.

[0068] Example 3

[0069] This embodiment provides a preparation process of waterproof, anti-corrosion and anti-seepage concrete, comprising the following steps:

[0070] Step S1: In parts by weight, 90 parts of anhydrous ethanol and 22 parts of deionized water are mixed evenly, and then 4 parts of 3-aminopropyltriethoxysilane are added and stirred for 50 minutes, the pH is adjusted to 4.7 with glacial acetic acid, and then 7 parts of agave fiber are added and immersed for 3 hours, and dried after the immersion is completed to obtain modified agave fiber; 3 parts of silicon dioxide are added to 190 parts of deionized water and stirred for 35 minutes, and then ultrasonically shaken (power is 550W, time is 40 minutes) to obtain a silicon dioxide dispersion; 7 parts of the modified agave fiber are immersed in 190 parts of the silicon dioxide dispersion for 7 hours, and vacuum dried to obtain silicon dioxide modified agave fiber;

[0071] Step S2: by weight, 290 parts of coarse aggregate (150 parts of granite and 140 parts of limestone), 220 parts of fine aggregate river sand, 110 parts of cement composite material, 25 parts of silica-modified agave fiber, 12 parts of hydrophobic stone and 250 parts of deionized water were mixed and stirred for 25 minutes, and then allowed to stand for 18 minutes to obtain a mixture;

[0072] Step S3: In parts by weight, 5 parts of a naphthalene-based water reducer and 8 parts of a fatty alcohol polyoxyethylene ether penetrant are added to 780 parts of the mixture, stirred for 15 minutes, poured into a mold, and demolded and cured after solidification to obtain a waterproof, anti-corrosion and anti-seepage concrete.

[0073] Comparative Example 1

[0074] This comparative example provides a process for preparing concrete, which differs from Example 1 in that sulphoaluminate cement I is used instead of cement composite material.

[0075] Comparative Example 2

[0076] This comparative example provides a process for preparing concrete, which differs from Example 1 in that sulphoaluminate cement II is used instead of sulphoaluminate cement I to prepare the cement composite material.

[0077] Comparative Example 3

[0078] This comparative example provides a process for preparing concrete, which differs from Example 1 in that commercially available silica is used instead of silica-modified agave fiber.

[0079] Comparative Example 4

[0080] This comparative example provides a process for preparing concrete, which differs from Example 1 in that 14 parts of allophane are not added.

[0081] Comparative Example 5

[0082] This comparative example provides a process for preparing concrete, which is different from Example 1 in that the amount of granite in the coarse aggregate is changed to 250 parts, and the amount of limestone is changed to 50 parts.

[0083] Comparative Example 6

[0084] This comparative example provides a process for preparing concrete, which is different from Example 1 in that the amount of granite in the coarse aggregate is changed to 100 parts, and the amount of limestone is changed to 200 parts.

[0085] The performance of the concrete provided in the above embodiments and comparative examples was tested, and the testing method was as follows:

[0086] (1) Water absorption test: Test according to the requirements of GB / T 50081-2016 Standard for Test Methods of Mechanical Properties of Ordinary Concrete.

[0087] (2) Anti-seepage pressure test: The test shall be conducted in accordance with the requirements of GB / T 50082-2009 Test methods for long-term properties and durability of ordinary concrete.

[0088] (3) Compressive strength test: The test shall be conducted in accordance with the requirements of GB / T 50081-2016 Standard for Test Methods of Mechanical Properties of Ordinary Concrete.

[0089] The above performance test data is shown in Table 1.

[0090] Table 1 Performance test results

[0091] Water absorption (%) Impermeability pressure (MPa) 28d compressive strength (MPa) Example 1 2.47 1.95 47.9 Example 2 2.63 1.87 47.1 Example 3 2.55 1.92 47.5 Comparative Example 1 5.24 1.34 39.6 Comparative Example 2 3.38 1.55 44.8 Comparative Example 3 5.16 1.39 40.2 Comparative Example 4 5.47 1.22 38.5 Comparative Example 5 3.29 1.61 45.6 Comparative Example 6 3.32 1.58 45.1

[0092] From the above content, it can be seen that the present invention prepares waterproof, anti-corrosion and anti-seepage concrete (Examples 1 to 3) by compounding the main aggregate of concrete and introducing functional components such as silica-modified agave fiber, cement composite material and hydrophobic stone. The water absorption rate of the concrete is 2.47-2.63%, the anti-seepage pressure is 1.87-1.95 MPa, and the 28d compressive strength is 47.1-47.9 MPa.

[0093] Compared with Example 1, sulfoaluminate cement I was used to replace the cement composite material, and the water absorption rate increased, the anti-seepage pressure decreased, and the compressive strength decreased (Comparative Example 1); Compared with Example 1, sulfoaluminate cement II was used to replace sulfoaluminate cement I for the preparation of cement composite materials. Since the particle size of sulfoaluminate cement II was too large and the modification effect was not good, the water absorption rate increased, the anti-seepage pressure decreased, and the compressive strength decreased (Comparative Example 2); Compared with Example 1, commercially available silica was used to replace silica-modified agave fiber, and the water absorption rate increased, the anti-seepage pressure decreased, and the compressive strength decreased (Comparative Example 3); Compared with Example Compared with Example 1, if 14 parts of allophane are not added, the water absorption rate becomes larger, the impermeability pressure decreases, and the compressive strength decreases (Comparative Example 4); compared with Example 1, the amount of granite in the coarse aggregate is changed to 250 parts, and the amount of limestone is changed to 50 parts. Since the amount of granite is too much, the compounding effect is not good, the water absorption rate becomes larger, the impermeability pressure decreases, and the compressive strength decreases (Comparative Example 5); compared with Example 1, the amount of granite in the coarse aggregate is changed to 100 parts, and the amount of limestone is changed to 200 parts. Since the amount of granite is too little, the compounding effect is not good, the water absorption rate becomes larger, the impermeability pressure decreases, and the compressive strength decreases (Comparative Example 6).

[0094] In summary, the present invention prepares waterproof, anti-corrosion and anti-seepage concrete by compounding the main aggregate of concrete and introducing functional components such as silica-modified agave fiber, cement composite material and hydrophobic stone. Through the synergistic effect of multiple components, the water absorption rate of concrete is effectively reduced, the compressive strength is improved, and good anti-seepage performance is obtained.

Claims

1. A preparation process for waterproof, anti-corrosion and anti-seepage concrete, characterized in that: The following steps are involved: Step S1: in parts by weight, 80 to 100 parts of anhydrous ethanol and 20 to 24 parts of deionized water are mixed evenly, then 2 to 6 parts of 3-aminopropyltriethoxysilane are added and stirred for 40 to 60 minutes, the pH is adjusted to 4.6 to 4.8 with glacial acetic acid, and then 6 to 8 parts of agave fiber are added and immersed for 2 to 4 hours, and dried after the immersion is completed to obtain modified agave fiber; 2 to 4 parts of silicon dioxide are added to 180 to 200 parts of deionized water and stirred for 30 to 40 minutes, and then ultrasonically vibrated to obtain a silicon dioxide dispersion; 6 to 8 parts of the modified agave fiber are immersed in 180 to 200 parts of the silicon dioxide dispersion for 6 to 8 hours, and vacuum dried to obtain silicon dioxide modified agave fiber; Step S2: by weight, 280-300 parts of coarse aggregate, 200-240 parts of fine aggregate, 100-120 parts of cement, 20-30 parts of silica-modified agave fiber, 10-14 parts of allophane and 240-260 parts of deionized water are mixed and stirred for 20-30 minutes, and then allowed to stand for 16-20 minutes to obtain a mixture; Step S3: by weight, add 4 to 6 parts of water reducing agent and 6 to 10 parts of penetrant into 760 to 800 parts of the mixture, stir for 10 to 20 minutes, pour into a mold, demold and maintain after solidification to obtain waterproof, anti-corrosion and anti-seepage concrete.

2. The preparation process of a waterproof, anti-corrosion and anti-seepage concrete according to claim 1, characterized in that: The conditions of the ultrasonic oscillation treatment include: power of 500-600W and time of 30-50min.

3. The preparation process of a waterproof, anti-corrosion and anti-seepage concrete according to claim 1, characterized in that: The coarse aggregate is granite and limestone; the mass ratio of granite to limestone in the coarse aggregate is (1-2):

1.

4. The preparation process of a waterproof, anti-corrosion and anti-seepage concrete according to claim 1, characterized in that: The fine aggregate is selected from any one of quartz sand, river sand, and machine-made sand, or a combination of at least two of them.

5. The process for preparing waterproof, anti-corrosion and anti-seepage concrete according to claim 1, characterized in that: The water reducer is selected from any one of polycarboxylate water reducer, melamine water reducer and naphthalene water reducer or a combination of at least two thereof.

6. The process for preparing waterproof, anti-corrosion and anti-seepage concrete according to claim 1, characterized in that: The penetrant is selected from any one of lauryl alcohol polyoxyethylene ether, nonylphenol polyoxyethylene ether, and fatty alcohol polyoxyethylene ether, or a combination of at least two thereof.

7. The process for preparing waterproof, anti-corrosion and anti-seepage concrete according to claim 1, characterized in that: The cement is a cement composite material; The preparation method of the cement composite material comprises: adding 2 to 4 parts of polyvinyl pyrrolidone to 100 to 110 parts of deionized water by weight and stirring evenly, then adding 4 to 8 parts of carboxylated graphene and ultrasonically dispersing for 50 to 60 minutes to obtain a graphene suspension; mixing 100 to 110 parts of the graphene suspension and 130 to 140 parts of sulphoaluminate cement for 6 to 8 minutes, drying, and crushing to obtain a cement composite material.

8. The process for preparing waterproof, anti-corrosion and anti-seepage concrete according to claim 7, characterized in that: The preparation method of the carboxylated graphene comprises: adding 2 to 6 parts of graphene oxide to 400 to 500 parts of deionized water by weight, ultrasonically dispersing for 50 to 60 minutes, then adding 6 to 10 parts of sodium hydroxide and 16 to 20 parts of azobisisobutyronitrile and ultrasonically dispersing for 30 to 40 minutes, reacting at 30 to 34° C. for 4 to 6 hours, washing with water, and drying to obtain the carboxylated graphene.

9. The process for preparing waterproof, anti-corrosion and anti-seepage concrete according to claim 7, characterized in that: The particle size of the sulphoaluminate cement is 20 to 200 μm.

10. The process for preparing waterproof, anti-corrosion and anti-seepage concrete according to claim 1, characterized in that: The preparation method of the allophane comprises: mixing 180 to 200 parts by weight of an aluminum chloride aqueous solution with a molar concentration of 0.1 mol / L and 180 to 200 parts of a sodium silicate aqueous solution with a molar concentration of 0.15 mol / L and stirring for 60 to 80 minutes, removing the supernatant by centrifugation to obtain a white gel, washing the white gel with deionized water, and freeze-drying to obtain an intermediate; adding 100 to 120 parts of the intermediate to 260 to 300 parts of a sulfuric acid solution with a mass concentration of 20% to obtain a white gel; The mixture is soaked for 4 to 6 hours, filtered, washed and dried to obtain an acidified product; 10 to 14 parts of the acidified product, 4 to 6 parts of hexadecyltrimethylammonium bromide and 1 to 3 parts of sodium hydroxide are added to 280 to 300 parts of deionized water, stirred at 60 to 70° C. for 2 to 4 hours, and then transferred to a microwave reactor for microwave treatment (power of 700 to 800 W, temperature of 100 to 110° C., and time of 60 to 80 min). After the microwave treatment is completed, the mixture is cooled, filtered, washed and dried to obtain allophane.