Impermeable material for geotechnical engineering construction and preparation method thereof

Abstract

The invention discloses an impermeable material for geotechnical engineering construction and a preparation method thereof, and relates to the technical field of geotechnical engineering, the impermeable material is prepared from the following raw materials by weight: 10-16 parts of sulphoaluminate cement, 1-3 parts of ash calcium powder, 0.8-1.2 parts of incense ash, 0.3-0.5 part of single-layer graphene oxide sheet, 15-25 parts of fly ash, 3-5 parts of rosin-based hyperbranched epoxy resin, 3-5 parts of (3, 4-dichlorophenyl)-1, 3, 4-trimethyl-1, 3-pentanediol monoisobutyrate, 3-5 parts of (3, 4-dichlorophenyl)-1, 3, 4-trimethyl-1, 3-pentanediol monoisobutyrate The invention discloses a high-temperature-resistant coating which is prepared from the following components in parts by weight: 1-3 parts of 2, 4-diaminoacridine-9-yl) boric acid, 1-3 parts of double-end epoxy silicone oil, 2-3 parts of a dispersing agent, 1-3 parts of 2, 4-diamino-6-phenyl-1, 3, 5-triazine, 0.2-0.4 part of a fiber material, 1-2 parts of citrus pulp powder and 5-8 parts of water. The material is high in compressive strength, remarkable in anti-seepage effect, excellent in acid, alkali and salt resistance and dry-wet cycle resistance, sufficient in frost resistance and long in service life.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of geotechnical engineering, and in particular to a seepage control material for geotechnical engineering construction and a preparation method thereof. BACKGROUND

[0002] In order to avoid the increasing phenomenon of natural disasters, current engineering needs a large number of seepage control measures, especially in geotechnical engineering, the seepage control of geotechnical engineering located in the slope is the first thing to do. The implementation of seepage control cannot be separated from the use of seepage control materials. Seepage control material is one of the most important materials in the construction industry, which is a functional material for preventing liquid substances (such as water) or gaseous (such as water vapor) substances from entering the protective structure. It has an incomparable seepage control effect that ordinary waterproof materials cannot match, and it has a higher requirement for the water vapor permeation coefficient. Seepage control materials with good comprehensive performance and performance stability are one of the essential materials for geotechnical engineering construction, and are the key to guarantee the quality and safety of geotechnical engineering construction.

[0003] At present, there are various seepage control materials on the market with different performances. However, they more or less have the technical defects of high construction requirements, poor adaptability, easy aging, poor self-healing performance, difficult to guarantee seepage control effect under the action of high salt, strong acid, strong alkali and dry-wet cycle, insufficient frost resistance, high cost and the like.

[0004] In order to solve the above problems, a preparation method of a seepage control material for buildings is disclosed in Chinese patent No. CN115385602B, which comprises the following steps: dissolving an ionic liquid in an organic solvent, adding an organosilane after mixing uniformly, adding a soluble polymer and dimethyl titanate and stirring uniformly, sealing and standing for 12-16 hours, then water bath heating reaction, and then exposing in air for 6-8 days to obtain a modified ionic liquid; mixing the modified ionic liquid 40-60%, nano-silicon dioxide 10-20%, fly ash 10-20%, bentonite 5-10% and sodium silicate 5-10% according to the weight percentage and stirring uniformly at 25-30°C to obtain the seepage control material. The seepage control material obtained by the method of the present application has high compressive strength and good seepage control effect. However, its acid, alkali and salt resistance and dry-wet cycle resistance need to be further improved.

[0005] Therefore, it is necessary to develop a seepage control material for geotechnical engineering construction with high compressive strength, significant seepage control effect, excellent acid, alkali and salt resistance, dry-wet cycle resistance and frost resistance, and long service life, which meets the market demand, has wide market value and application prospect, and has very important significance for promoting the development of the seepage control material field. SUMMARY

[0006] The main objective of this invention is to provide a geotechnical engineering construction seepage prevention material and its preparation method, which has high compressive strength, significant seepage prevention effect, excellent resistance to acid, alkali and salt, excellent resistance to wet and dry cycles, sufficient frost resistance, and long service life.

[0007] To achieve the above objectives, the present invention provides a seepage-proof material for geotechnical engineering construction, comprising the following raw materials in parts by weight: 10-16 parts of sulfoaluminate cement, 1-3 parts of lime powder, 0.8-1.2 parts of incense ash, 0.3-0.5 parts of single-layer graphene oxide sheets, 15-25 parts of fly ash, 3-5 parts of rosin-based hyperbranched epoxy resin, 1-3 parts of (3,6-diaminoacridin-9-yl)boric acid, 1-3 parts of double-ended epoxy silicone oil, 2-3 parts of dispersant, 1-3 parts of 2,4-diamino-6-phenyl-1,3,5-triazine, 0.2-0.4 parts of fiber material, 1-2 parts of citrus pomace powder, and 5-8 parts of water.

[0008] Preferably, the sulfoaluminate cement is R.SAC 42.5 grade sulfoaluminate cement.

[0009] Preferably, the single-layer graphene oxide sheet has a diameter of 0.5-5 μm and a thickness of 0.8-1.2 nm.

[0010] Preferably, the particle size of the lime powder is 800-1200 mesh.

[0011] Preferably, the particle size of the incense ash is 1000-1300 mesh.

[0012] Preferably, the particle size of the fly ash is 300-600 mesh.

[0013] Preferably, there are no special requirements for the source of the rosin-based hyperbranched epoxy resin. In one embodiment of the present invention, the rosin-based hyperbranched epoxy resin is prepared according to the method of Example 1 of Chinese Invention Patent No. CN106519188B.

[0014] Preferably, the double-ended epoxy silicone oil is IOTA 105-2 epoxy silicone oil, provided by Anhui Aiyota Silicone Oil Co., Ltd.

[0015] Preferably, the dispersant is NOPCO SN-Dispersant 5040 dispersant from Japan.

[0016] Preferably, the fiber material is a mixture of waste coconut fiber and chitosan fiber in a mass ratio of (3-5):1.

[0017] Preferably, the fiber material has an average diameter of 3-10 μm and a length of 1-5 mm.

[0018] Preferably, the particle size of the citrus pomace powder is 400-800 mesh.

[0019] Another objective of this invention is to provide a method for preparing the aforementioned seepage-proof material for geotechnical engineering construction, comprising the following steps: mixing the raw materials evenly according to their weight proportions to obtain the seepage-proof material for geotechnical engineering construction.

[0020] Due to the application of the above technical solution, the present invention has the following beneficial effects: (1) The preparation method of the seepage prevention material for geotechnical engineering construction disclosed in this invention can be achieved simply by mixing the raw materials evenly according to the weight proportions. No special equipment is required, nor is it necessary to modify the existing production line. It requires less capital investment, consumes less energy, has high preparation efficiency and high finished product qualification rate, is suitable for continuous large-scale production, and has high promotion and application value.

[0021] (2) The geotechnical engineering construction seepage prevention material disclosed in this invention is made from the following raw materials in parts by weight: 10-16 parts of sulfoaluminate cement, 1-3 parts of lime powder, 0.8-1.2 parts of incense ash, 0.3-0.5 parts of single-layer graphene oxide sheets, 15-25 parts of fly ash, 3-5 parts of rosin-based hyperbranched epoxy resin, 1-3 parts of (3,6-diaminoacridin-9-yl)boric acid, 1-3 parts of double-ended epoxy silicone oil, 2-3 parts of dispersant, 1-3 parts of 2,4-diamino-6-phenyl-1,3,5-triazine, 0.2-0.4 parts of fiber material, 1-2 parts of citrus pomace powder, and 5-8 parts of water. Through the mutual cooperation and synergistic effect of the raw materials, the resulting seepage prevention material has high compressive strength, significant seepage prevention effect, excellent resistance to acid, alkali, and salt, excellent resistance to wet and dry cycles, sufficient frost resistance, and long service life.

[0022] (3) The geotechnical engineering construction seepage prevention material disclosed in this invention uses solid waste such as incense ash, fly ash, waste coconut fiber and citrus residue powder as raw materials, which improves their value and added value. It is not only beneficial to environmental protection, but also to resource conservation, and realizes the transformation of waste into treasure. After they are added together, they work together with sulfoaluminate cement, lime powder and single-layer graphene oxide sheets. The activity is complementary and the particle size overlaps, which can promote the hydration reaction, improve the density of the internal structure, block the capillary channels in the cement, thereby reducing the porosity, improving the seepage prevention performance and improving the compressive strength.

[0023] (4) The geotechnical engineering construction seepage prevention material disclosed in this invention, rosin-based hyperbranched epoxy resin, (3,6-diaminoacridin-9-yl)boric acid, double-ended epoxy silicone oil and 2,4-diamino-6-phenyl-1,3,5-triazine, which contain epoxy groups or amino groups respectively, can undergo epoxy ring-opening reaction to form an interpenetrating network structure, which fixes the inorganic raw materials inside the interpenetrating network structure, which is beneficial to improve the density, thereby improving the compressive strength and seepage prevention performance; through the above organic components, rosin-based hyperbranched epoxy resin, acridine group, boric acid group, silicone oil and phenyl triazine structure are introduced into the seepage prevention material at the same time. Under the multiple effects of electronic effect, steric effect and conjugation effect, they can effectively improve the compressive strength, seepage prevention, waterproof and aging resistance performance, so that the product has excellent acid, alkali and salt resistance and dry and wet cycle resistance, and sufficient antifreeze performance, thereby effectively extending the service life of the seepage prevention material.

[0024] (5) The geotechnical engineering construction seepage-proof material disclosed in this invention incorporates fiber materials, wherein the fiber materials are a mixture of waste coconut fiber and chitosan fiber in a mass ratio of (3-5):1. This selection allows them to effectively resist seepage and cracking, while also improving compressive strength and compatibility with other raw materials in the seepage-proof material, thereby improving performance stability and extending its service life. By avoiding the use of bentonite, which is considered a "cancer in engineering," hidden hazards are avoided, and the seepage and cracking resistance is improved, making geotechnical engineering construction safer and of higher quality. Detailed Implementation

[0025] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. Example 1

[0026] A seepage-proof material for geotechnical engineering construction is made from the following raw materials in parts by weight: 10 parts sulfoaluminate cement, 1 part lime powder, 0.8 parts incense ash, 0.3 parts single-layer graphene oxide sheets, 15 parts fly ash, 3 parts rosin-based hyperbranched epoxy resin, 1 part (3,6-diaminoacridin-9-yl)boric acid, 1 part double-ended epoxy silicone oil, 2 parts dispersant, 1 part 2,4-diamino-6-phenyl-1,3,5-triazine, 0.2 parts fiber material, 1 part citrus pomace powder, and 5 parts water.

[0027] The sulfoaluminate cement is R.SAC 42.5 grade sulfoaluminate cement; the single-layer graphene oxide sheet has a diameter of 0.5 μm and a thickness of 0.8 nm; the ash powder has a particle size of 800 mesh; the incense ash has a particle size of 1000 mesh; the fly ash has a particle size of 300 mesh; the rosin-based hyperbranched epoxy resin is prepared according to the method of Example 1 of Chinese Invention Patent No. CN106519188B; the double-ended epoxy silicone oil is IOTA 105-2 epoxy silicone oil, provided by Anhui Aiyota Silicone Oil Co., Ltd.; the dispersant is NOPCO SN-Dispersant 5040 dispersant from Japan.

[0028] The fiber material is a mixture of waste coconut fiber and chitosan fiber in a mass ratio of 3:1; the average diameter of the fiber material is 3μm and the length is 1mm; the particle size of the citrus residue powder is 400 mesh.

[0029] A method for preparing a seepage-proof material for geotechnical engineering construction includes the following steps: mixing the raw materials evenly according to their weight proportions to obtain the seepage-proof material for geotechnical engineering construction. Example 2

[0030] A seepage-proof material for geotechnical engineering construction is made from the following raw materials in parts by weight: 12 parts sulfoaluminate cement, 1.5 parts lime powder, 0.9 parts incense ash, 0.35 parts single-layer graphene oxide sheets, 17 parts fly ash, 3.5 parts rosin-based hyperbranched epoxy resin, 1.5 parts (3,6-diaminoacridin-9-yl)boric acid, 1.5 parts double-ended epoxy silicone oil, 2.3 parts dispersant, 1.5 parts 2,4-diamino-6-phenyl-1,3,5-triazine, 0.25 parts fiber material, 1.2 parts citrus pomace powder, and 6 parts water.

[0031] The sulfoaluminate cement is R.SAC 42.5 grade sulfoaluminate cement; the single-layer graphene oxide sheet has a diameter of 2 μm and a thickness of 0.9 nm; the ash powder has a particle size of 900 mesh; the incense ash has a particle size of 1100 mesh; the fly ash has a particle size of 400 mesh; the rosin-based hyperbranched epoxy resin is prepared according to the method of Example 1 of Chinese Invention Patent No. CN106519188B; the double-ended epoxy silicone oil is IOTA 105-2 epoxy silicone oil, provided by Anhui Aiyota Silicone Oil Co., Ltd.; the dispersant is NOPCO SN-Dispersant 5040 dispersant from Japan.

[0032] The fiber material is a mixture of waste coconut fiber and chitosan fiber in a mass ratio of 3.5:1; the average diameter of the fiber material is 5μm and the length is 2mm; the particle size of the citrus residue powder is 500 mesh.

[0033] A method for preparing a seepage-proof material for geotechnical engineering construction includes the following steps: mixing the raw materials evenly according to their weight proportions to obtain the seepage-proof material for geotechnical engineering construction. Example 3

[0034] A seepage-proof material for geotechnical engineering construction is made from the following raw materials in parts by weight: 13 parts sulfoaluminate cement, 2 parts lime powder, 1 part incense ash, 0.4 parts single-layer graphene oxide sheets, 20 parts fly ash, 4 parts rosin-based hyperbranched epoxy resin, 2 parts (3,6-diaminoacridin-9-yl)boric acid, 2 parts double-ended epoxy silicone oil, 2.5 parts dispersant, 2 parts 2,4-diamino-6-phenyl-1,3,5-triazine, 0.3 parts fiber material, 1.5 parts citrus pomace powder, and 6.5 parts water.

[0035] The sulfoaluminate cement is R.SAC 42.5 grade sulfoaluminate cement; the single-layer graphene oxide sheet has a diameter of 3.5 μm and a thickness of 1 nm; the ash powder has a particle size of 1000 mesh; the incense ash has a particle size of 1150 mesh; the fly ash has a particle size of 450 mesh; the rosin-based hyperbranched epoxy resin is prepared according to the method of Example 1 of Chinese Invention Patent No. CN106519188B; the double-ended epoxy silicone oil is IOTA 105-2 epoxy silicone oil, provided by Anhui Aiyota Silicone Oil Co., Ltd.; the dispersant is NOPCO SN-Dispersant 5040 dispersant from Japan.

[0036] The fiber material is a mixture of waste coconut fiber and chitosan fiber in a mass ratio of 4:1; the average diameter of the fiber material is 7 μm and the length is 3.5 mm; the particle size of the citrus residue powder is 600 mesh.

[0037] A method for preparing a seepage-proof material for geotechnical engineering construction includes the following steps: mixing the raw materials evenly according to their weight proportions to obtain the seepage-proof material for geotechnical engineering construction. Example 4

[0038] A seepage-proof material for geotechnical engineering construction is made from the following raw materials in parts by weight: 15 parts sulfoaluminate cement, 2.5 parts lime powder, 1.1 parts incense ash, 0.45 parts single-layer graphene oxide sheets, 23 parts fly ash, 4.5 parts rosin-based hyperbranched epoxy resin, 2.5 parts (3,6-diaminoacridin-9-yl)boric acid, 2.5 parts double-ended epoxy silicone oil, 2.8 parts dispersant, 2.5 parts 2,4-diamino-6-phenyl-1,3,5-triazine, 0.35 parts fiber material, 1.8 parts citrus pomace powder, and 7.5 parts water.

[0039] The sulfoaluminate cement is R.SAC 42.5 grade sulfoaluminate cement; the single-layer graphene oxide sheet has a diameter of 4.5 μm and a thickness of 1.1 nm; the ash powder has a particle size of 1100 mesh; the incense ash has a particle size of 1250 mesh; the fly ash has a particle size of 550 mesh; the rosin-based hyperbranched epoxy resin is prepared according to the method of Example 1 of Chinese Invention Patent No. CN106519188B; the double-ended epoxy silicone oil is IOTA 105-2 epoxy silicone oil, provided by Anhui Aiyota Silicone Oil Co., Ltd.; the dispersant is NOPCO SN-Dispersant 5040 dispersant from Japan.

[0040] The fiber material is a mixture of waste coconut fiber and chitosan fiber in a mass ratio of 4.5:1; the average diameter of the fiber material is 8 μm and the length is 4 mm; the particle size of the citrus residue powder is 750 mesh.

[0041] A method for preparing a seepage-proof material for geotechnical engineering construction includes the following steps: mixing the raw materials evenly according to their weight proportions to obtain the seepage-proof material for geotechnical engineering construction. Example 5

[0042] A seepage-proof material for geotechnical engineering construction is made from the following raw materials in parts by weight: 16 parts of sulfoaluminate cement, 3 parts of lime powder, 1.2 parts of incense ash, 0.5 parts of single-layer graphene oxide sheets, 25 parts of fly ash, 5 parts of rosin-based hyperbranched epoxy resin, 3 parts of (3,6-diaminoacridin-9-yl)boric acid, 3 parts of double-ended epoxy silicone oil, 3 parts of dispersant, 3 parts of 2,4-diamino-6-phenyl-1,3,5-triazine, 0.4 parts of fiber material, 2 parts of citrus pomace powder, and 8 parts of water.

[0043] The sulfoaluminate cement is R.SAC 42.5 grade sulfoaluminate cement; the single-layer graphene oxide sheet has a diameter of 5 μm and a thickness of 1.2 nm; the ash powder has a particle size of 1200 mesh; the incense ash has a particle size of 1300 mesh; the fly ash has a particle size of 600 mesh; the rosin-based hyperbranched epoxy resin is prepared according to the method of Example 1 of Chinese Invention Patent No. CN106519188B; the double-ended epoxy silicone oil is IOTA 105-2 epoxy silicone oil, provided by Anhui Aiyota Silicone Oil Co., Ltd.; the dispersant is NOPCO SN-Dispersant 5040 dispersant from Japan.

[0044] The fiber material is a mixture of waste coconut fiber and chitosan fiber in a mass ratio of 4.5:1; the average diameter of the fiber material is 10 μm and the length is 5 mm; the particle size of the citrus residue powder is 800 mesh.

[0045] A method for preparing a seepage-proof material for geotechnical engineering construction includes the following steps: mixing the raw materials evenly according to their weight proportions to obtain the seepage-proof material for geotechnical engineering construction.

[0046] Comparative Example 1 A seepage-proof material for geotechnical engineering construction is basically the same as that in Example 1, except that it does not contain incense ash and single-layer graphene oxide sheets.

[0047] Comparative Example 2 A seepage-proof material for geotechnical engineering construction is basically the same as that in Example 1, except that it does not contain (3,6-diaminoacrid-9-yl)boric acid and double-ended epoxy silicone oil.

[0048] To further illustrate the beneficial technical effects of the geotechnical engineering construction seepage-proof materials involved in the various embodiments of the present invention, relevant performance tests were conducted on the geotechnical engineering construction seepage-proof materials prepared in Examples 1-5 and Comparative Examples 1-2. The test results are shown in Table 1. The test methods are as follows: The permeability coefficient test was conducted using the variable head permeability test in the People's Republic of China industry standard JTG E40-2007. The test solutions used were pure water, nitric acid solution (pH=3), sodium hydroxide solution (pH=12), and sodium chloride solution (600mM), respectively, to test the barrier properties of modified bentonite against acid, alkali, and salt solutions. The resistance to wet-dry cycles was measured by the permeability coefficient after 5 wet-dry cycles (permeation and wetting in 12.5mmol / L CaCl2 solution for 2 hours, followed by drying in an oven at 36.5℃ for 3 hours). The smaller the value, the stronger the resistance to wet-dry cycles. The frost resistance of the material was tested according to JTG E30-2005; the 28-day compressive strength was tested according to GB / T 17671-2021.

[0049]

[0050] As can be seen from Table 1, the geotechnical engineering construction seepage prevention materials disclosed in the embodiments of the present invention have better seepage prevention performance, compressive strength and frost resistance than the comparative products, and have better resistance to acid, alkali and salt, and stronger resistance to wet and dry cycles. The addition of incense ash, single-layer graphene oxide sheets, (3,6-diaminoacridin-9-yl)boric acid and double-ended epoxy silicone oil are beneficial to improving the above properties.

[0051] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A seepage-proof material for geotechnical engineering construction, characterized in that, It is made from the following raw materials in parts by weight: 10-16 parts sulfoaluminate cement, 1-3 parts lime powder, 0.8-1.2 parts incense ash, 0.3-0.5 parts single-layer graphene oxide sheets, 15-25 parts fly ash, 3-5 parts rosin-based hyperbranched epoxy resin, 1-3 parts (3,6-diaminoacridin-9-yl)boric acid, 1-3 parts double-ended epoxy silicone oil, 2-3 parts dispersant, 1-3 parts 2,4-diamino-6-phenyl-1,3,5-triazine, 0.2-0.4 parts fiber material, 1-2 parts citrus pomace powder, and 5-8 parts water.

2. The seepage-proof material for geotechnical engineering construction according to claim 1, characterized in that, The sulfoaluminate cement is R.SAC 42.5 grade sulfoaluminate cement.

3. The seepage-proof material for geotechnical engineering construction according to claim 1, characterized in that, The single-layer graphene oxide sheet has a diameter of 0.5-5 μm and a thickness of 0.8-1.2 nm.

4. The seepage-proof material for geotechnical engineering construction according to claim 1, characterized in that, The particle size of the hydrated lime powder is 800-1200 mesh.

5. The seepage-proof material for geotechnical engineering construction according to claim 1, characterized in that, The particle size of the incense ash is 1000-1300 mesh; the particle size of the fly ash is 300-600 mesh.

6. The seepage-proof material for geotechnical engineering construction according to claim 1, characterized in that, The dispersant is SN-Dispersant 5040.

7. The seepage-proof material for geotechnical engineering construction according to claim 1, characterized in that, The fiber material is a mixture of waste coconut fiber and chitosan fiber in a mass ratio of (3-5):

1.

8. The seepage-proof material for geotechnical engineering construction according to claim 7, characterized in that, The fiber material has an average diameter of 3-10 μm and a length of 1-5 mm.

9. The seepage-proof material for geotechnical engineering construction according to claim 1, characterized in that, The particle size of the citrus pomace powder is 400-800 mesh.

10. A method for preparing a seepage-proof material for geotechnical engineering construction according to any one of claims 1-9, characterized in that, The process includes the following steps: After mixing the raw materials evenly according to their weight proportions, a seepage-proof material for geotechnical engineering construction is obtained.

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