Waterproof building material

Abstract

The invention relates to the technical field of waterproof building materials, in particular to a waterproof building material. The waterproof building material is prepared from the following raw materials in parts by weight: 80-100 parts of cement, 8-15 parts of modified montmorillonite, 5-8 parts of modified konjac glucomannan, 3-5 parts of a fiber reinforced material, 1-3 parts of a coupling agent, 1-3 parts of a dispersing agent and 0.1-0.5 part of a defoaming agent. According to the invention, through the synergistic effect of various raw materials, after the montmorillonite is modified, the interlayer spacing is increased, the hydrophilicity is weakened, a nano-scale sheet-shaped barrier layer can be formed in a cement matrix, like countless tiny shields, and water molecule permeation is effectively blocked, and the modified konjac glucomannan has good water resistance in an alkaline cement environment. The water-proofing agent has a cross-linking reaction with hydrated calcium silicate and calcium hydroxide of cement to form a continuous gel network structure to fill pores and capillary channels in set cement and cut off water seepage channels, so that a good water-proofing effect of a building in a long-term humid environment is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of waterproof building materials, and specifically provides a waterproof building material. Background Art

[0002] In the construction field, waterproof building materials are key materials to ensure the quality and service life of buildings. Currently, common waterproof building materials on the market mainly include asphalt-based waterproof materials, polymer waterproof materials, and cement-based waterproof materials, etc. Cement-based waterproof materials use cement as the base material, add various additives and polymers, and form a dense waterproof layer through hydration reaction with water, having advantages such as firm adhesion to the base layer and convenient construction.

[0003] In the prior art, the waterproof performance of traditional waterproof building materials is limited, it is difficult to cope with complex environments such as long-term rain erosion and groundwater seepage, and leakage is likely to occur, resulting in moisture and mildew inside the building, affecting the structural safety and service function; at the same time, when some materials focus on waterproof performance, they sacrifice mechanical properties, with insufficient compressive and flexural strengths, and are prone to cracking under external loads or temperature changes, shortening the service life of the materials.

[0004] Based on this, the present invention provides a waterproof building material. Summary of the Invention

[0005] The purpose of the present invention is to provide a waterproof building material. The waterproof building material prepared by the present invention not only has good waterproof performance, but also has excellent mechanical properties, effectively improving the service life of the waterproof building material.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A waterproof building material is composed of the following raw materials in parts by weight: 80 - 100 parts of cement, 8 - 15 parts of modified montmorillonite, 5 - 8 parts of modified konjac glucomannan, 3 - 5 parts of fiber reinforcing material, 1 - 3 parts of coupling agent, 1 - 3 parts of dispersant, and 0.1 - 0.5 parts of defoaming agent.

[0007] Preferably, the coupling agent is one of γ-aminopropyltriethoxysilane or γ-glycidoxypropyltrimethoxysilane.

[0008] Preferably, the dispersant is one of sodium polycarboxylate, sodium hexametaphosphate, or polyvinylpyrrolidone.

[0009] Preferably, the defoaming agent is one of polydimethylsiloxane emulsion or BYK-022.

[0010] Preferably, the preparation steps of the modified konjac glucomannan are as follows: Select konjac glucomannan powder and ethanol and add them to a reaction kettle. The volume ratio of the konjac glucomannan powder to ethanol is 2:8. After continuously stirring at 300 - 500 r / min for 10 - 30 min by a stirrer inside the reaction kettle, adjust the rotation speed to 200 - 400 r / min and stir for 10 - 30 min. Meanwhile, during the stirring process, continuously add acetic anhydride and dropwise add an acid-base regulator to adjust the pH value to 7 - 8. Then, set the temperature at 40 - 60 °C and react for 2 - 4 h. During the reaction process, the stirrer continuously stirs at 100 - 200 r / min to obtain a first mixture. Wash and dry the first mixture to complete the preparation of the modified konjac glucomannan.

[0011] Preferably, the molar ratio of the konjac glucomannan to acetic anhydride is 1:(1 - 3), and the ethanol concentration is 50%.

[0012] Preferably, the preparation method of the modified montmorillonite is as follows: Select sodium-based montmorillonite, cetyltrimethylammonium bromide, and water and add them to a constant-temperature water bath according to the ratio of 1:(0.5 - 1):(20 - 50). Set the temperature at 60 - 70 °C and continuously stir at 300 - 500 r / min for 5 - 6 h by a magnetic stirrer to obtain a second mixture. Centrifuge the second mixture by a centrifugal filter to perform solid-liquid separation. Then, remove the supernatant to obtain a third mixed solution, and wash the third mixed solution with distilled water multiple times. After the washing is completed, add it to a vacuum dryer for drying to complete the preparation of the modified montmorillonite.

[0013] Preferably, the rotation speed of the centrifugal filter is 8000 - 10000 rpm for 10 - 15 min. The temperature of the vacuum dryer is set at 60 - 80 °C, the pressure is -0.1 to -0.3 MPa, and the duration is 12 - 16 h. The conductivity of the third mixed solution after washing is less than 50 μS / cm.

[0014] Preferably, select a lithium chloride solution and aramid pulp and add them to a water bath. The mass ratio of the lithium chloride solution to aramid pulp is (10 - 20):1, the concentration of the lithium chloride solution is 20%, the temperature of the water bath is set at 80 - 90 °C, and react for 3 - 6 h. After the reaction, take it out and wash it 4 - 8 times with distilled water, then transfer it to a petri dish and place it in a blast drying oven to dry at 90 - 120 °C to complete the preparation of the fiber-reinforced material.

[0015] A waterproof building material, comprising the following steps:

[0016] Step 1: Dry mixing: Weigh cement, modified konjac glucomannan, modified montmorillonite, and fiber-reinforced material as needed and place them in a dry powder mixer. Mix at a rotation speed of 200 rpm for 10 - 12 min to obtain a mixed material;

[0017] Step 2: Wet mixing. Add the mixture, coupling agent, dispersant, defoaming agent and water into a planetary mixer, and stir at 1000 rpm for 5 - 8 min. The ratio of water to the total amount of the mixture, coupling agent, dispersant and defoaming agent is 1:(0.25:0.4).

[0018] Step 3: Molding. Inject the wet - mixed material into a mold, vibrate to exhaust air, and cure at room temperature for 20 days to complete the preparation of the waterproof building material.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] 1. In the present invention, through the synergistic effect of various raw materials, after montmorillonite is modified, the layer spacing increases and the hydrophilicity weakens. It can form a nanoscale flaky barrier layer in the cement matrix, just like countless tiny shields, effectively blocking the penetration of water molecules. Modified konjac glucomannan undergoes a cross - linking reaction with hydrated calcium silicate and calcium hydroxide in the alkaline cement environment to form a continuous gel network structure, filling the pores and capillary channels inside the cement stone and cutting off the water seepage channels. At the same time, the coupling agent can enhance the interfacial bonding force between various raw materials, making the waterproof barrier more dense, further improving the overall waterproof performance of the material, and ensuring that the building can still maintain good waterproof effect in a long - term humid environment.

[0021] 2. In the present invention, after aramid pulp is treated with lithium chloride solution, its surface activity is enhanced and the bonding force with the cement matrix is significantly improved. During the stress process of the material, the fiber - reinforced material is evenly dispersed in the cement matrix. When the material is subjected to bending stress, the fibers can effectively disperse the stress and hinder the initiation and propagation of cracks. At the same time, modified montmorillonite and modified konjac glucomannan improve the toughness of the cement matrix, making the material less likely to undergo brittle fracture when stressed, greatly improving the flexural strength of the material, and enhancing the stability and durability of the building structure.

[0022] 3. In the present invention, due to the fact that modified konjac glucomannan has certain activity and water absorption, when there are tiny cracks in the material, external water will seep into the cracks, prompting modified konjac glucomannan to absorb water and swell. At the same time, its active groups react chemically with cement hydration products and substances such as carbon dioxide in the surrounding environment to generate new gelling substances. The newly generated gelling substances gradually fill the cracks, making the cracks gradually heal. Moreover, the layered structure of modified montmorillonite also plays a supporting and guiding role in the crack repair process, ensuring that the cracks can be effectively repaired, restoring the integrity and waterproof performance of the material, and extending the service life of the building. Detailed implementation method

[0023] Next, in combination with the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] It should be noted that all raw materials used in the following experiments are commercially available raw materials.

[0025] Example 1: A waterproof building material is composed of the following raw materials in parts by weight: 80 parts of cement, 8 parts of modified montmorillonite, 5 parts of modified konjac glucomannan, 3 parts of fiber reinforcing material, 1 part of coupling agent, 1 part of dispersant, and 0.1 part of defoaming agent.

[0026] The coupling agent is γ-aminopropyltriethoxysilane.

[0027] The dispersant is polycarboxylate sodium salt.

[0028] The defoaming agent is polydimethylsiloxane emulsion.

[0029] The preparation steps of the modified konjac glucomannan are as follows: Select konjac glucomannan powder and ethanol and add them to the reaction kettle. The volume ratio of konjac glucomannan powder to ethanol is 2:8. After continuously stirring at 300 r / min for 10 min by the stirrer in the reaction kettle, adjust the rotation speed to 200 r / min and stir for 10 min. At the same time, during the stirring process, continuously add acetic anhydride and dropwise add an acid-base regulator to adjust the pH value to 7. Then, set the temperature to 40 °C and react for 2 h. During the reaction process, the stirrer continuously stirs at 100 r / min to obtain a first mixture. Wash and dry the first mixture to complete the preparation of the modified konjac glucomannan.

[0030] The molar ratio of konjac glucomannan to acetic anhydride is 1:1, and the ethanol concentration is 50%.

[0031] The preparation method of the modified montmorillonite is as follows: Select sodium-based montmorillonite, cetyltrimethylammonium bromide, and water and add them to a thermostatic water bath at a ratio of 1:0.5:20. Set the temperature to 60 °C and continuously stir at 300 r / min for 5 h by a magnetic stirrer to obtain a second mixture. Centrifuge the second mixture by a centrifuge filter to perform solid-liquid separation. Then, remove the supernatant to obtain a third mixed solution, and wash the third mixed solution with distilled water multiple times. After the washing is completed, add it to a vacuum dryer for drying treatment to complete the preparation of the modified montmorillonite.

[0032] The centrifugal filter rotates at 8000 rpm for 10 min. The vacuum dryer is set at a temperature of 60 °C, a pressure of -0.1 MPa, and a duration of 12 h. After washing with the third mixed liquid, the conductivity is less than 50 μS / cm.

[0033] Select lithium chloride solution and aramid pulp and add them to a water bath. The mass ratio of lithium chloride solution to aramid pulp is 10:1, the concentration of the lithium chloride solution is 20%, the temperature of the water bath is set at 80 °C, react for 3 h. After the reaction, take it out and wash it 4 times with distilled water, then transfer it to a petri dish and put it in a blast drying oven to dry at 90 °C to complete the preparation of the fiber-reinforced material.

[0034] A waterproof building material, comprising the following steps:

[0035] Step 1: Dry mixing: Weigh cement, modified konjac glucomannan, modified montmorillonite and fiber-reinforced material as required and place them in a dry powder mixer, mix at a rotation speed of 200 rpm for 10 min to obtain a mixture.

[0036] Step 2: Wet mixing, add the mixture, coupling agent, dispersant, defoaming agent and water to a planetary mixer, stir at 1000 rpm for 5 min, and the ratio of water to the total amount of the mixture, coupling agent, dispersant and defoaming agent is 1:0.25.

[0037] Step 3, molding, inject the wet-mixed material into a mold, vibrate to exhaust air, and cure at room temperature for 20 days to complete the preparation of the waterproof building material.

[0038] Example 2: A waterproof building material is composed of the following raw materials in parts by weight: 90 parts of cement, 12 parts of modified montmorillonite, 6 parts of modified konjac glucomannan, 4 parts of fiber-reinforced material, 2 parts of coupling agent, 2 parts of dispersant and 0.3 part of defoaming agent.

[0039] The coupling agent uses γ-aminopropyltriethoxysilane.

[0040] The dispersant uses sodium polycarboxylate.

[0041] The defoaming agent uses polydimethylsiloxane emulsion.

[0042] The preparation steps of the modified konjac glucomannan are as follows: Select konjac glucomannan powder and ethanol and add them to a reaction kettle. The volume ratio of konjac glucomannan powder to ethanol is 2:8. After continuously stirring at 400 r / min for 20 min by the stirrer in the reaction kettle, adjust the rotation speed to 300 r / min and stir for 20 min. Meanwhile, during the stirring process, continuously add acetic anhydride and dropwise add an acid-base regulator to adjust the pH value to 7. Then, set the temperature to 50 °C and react for 3 h. During the reaction process, the stirrer continuously stirs at 150 r / min to obtain a first mixture. Wash and dry the first mixture to complete the preparation of the modified konjac glucomannan.

[0043] The molar ratio of konjac glucomannan to acetic anhydride is 1:2, and the ethanol concentration is 50%.

[0044] The preparation method of the modified montmorillonite is as follows: Select sodium-based montmorillonite, cetyltrimethylammonium bromide, and water and add them to a constant temperature water bath pot according to the ratio of 1:0.7:35. Set the temperature to 65 °C and continuously stir at 400 r / min for 5.5 h by a magnetic stirrer to obtain a second mixture. Perform a centrifugation operation on the second mixture by a centrifugal filter to carry out solid-liquid separation. Then, remove the supernatant to obtain a third mixed solution, and wash the third mixed solution multiple times with distilled water. After the washing is completed, add it to a vacuum dryer for drying treatment to complete the preparation of the modified montmorillonite.

[0045] The rotation speed of the centrifugal filter is 9000 rpm for 12 min. The temperature of the vacuum dryer is set to 70 °C, the pressure is -0.2 MPa, and the duration is 14 h. The conductivity of the third mixed solution is less than 50 μS / cm after washing.

[0046] Select lithium chloride solution and aramid pulp and add them to a water bath pot. The mass ratio of lithium chloride solution to aramid pulp is 15:1, the concentration of the lithium chloride solution is 20%, the temperature of the water bath pot is set to 85 °C, and react for 4 h. After the reaction, take it out and wash it 6 times with distilled water, then transfer it to a petri dish and put it in a blast drying oven to dry at 105 °C to complete the preparation of the fiber-reinforced material.

[0047] A waterproof building material includes the following steps:

[0048] Step 1: Dry mixing: Weigh cement, modified konjac glucomannan, modified montmorillonite, and fiber-reinforced material as needed and place them in a dry powder mixer. Mix at a rotation speed of 200 rpm for 11 min to obtain a mixed material;

[0049] Step 2: Wet mixing: Add the mixed material, coupling agent, dispersant, defoaming agent, and water to a planetary mixer and stir at 1000 rpm for 6 min. The ratio of water to the total amount of the mixed material, coupling agent, dispersant, and defoaming agent is 1:0.3;

[0050] Step 3, forming: Inject the wet-mixed materials into the mold, vibrate to exhaust air, and cure at room temperature for 20 days to complete the preparation of the waterproof building material.

[0051] Example 3: A waterproof building material is composed of the following raw materials in parts by weight: 100 parts of cement, 15 parts of modified montmorillonite, 8 parts of modified konjac glucomannan, 5 parts of fiber reinforcing material, 3 parts of coupling agent, 3 parts of dispersant, and 0.5 part of defoaming agent.

[0052] The coupling agent uses γ-glycidoxypropyltrimethoxysilane.

[0053] The dispersant uses polyvinylpyrrolidone.

[0054] The defoaming agent uses polydimethylsiloxane emulsion.

[0055] The preparation steps of the modified konjac glucomannan are as follows: Select konjac glucomannan powder and ethanol and add them to the reaction kettle. The volume ratio of konjac glucomannan powder to ethanol is 2:8. After continuously stirring at 500 r / min for 30 min by the stirrer in the reaction kettle, adjust the rotation speed to 400 r / min and stir for 30 min. At the same time, during the stirring process, continuously add acetic anhydride and dropwise add an acid-base regulator to adjust the pH value to 8. Then set the temperature at 60 °C and react for 4 h. During the reaction process, the stirrer continuously stirs at 100 - 200 r / min to obtain the first mixture. Wash and dry the first mixture to complete the preparation of the modified konjac glucomannan.

[0056] The molar ratio of konjac glucomannan to acetic anhydride is 1:3, and the ethanol concentration is 50%.

[0057] The preparation method of the modified montmorillonite is as follows: Select sodium-based montmorillonite, cetyltrimethylammonium bromide, and water and add them to a constant temperature water bath at a ratio of 1:1:50. Set the temperature at 70 °C and continuously stir at 500 r / min for 5 - 6 h by a magnetic stirrer to obtain the second mixture. Perform centrifugation on the second mixture by a centrifugal filter to separate the solid and liquid. Then remove the supernatant to obtain the third mixed solution. Wash the third mixed solution with distilled water multiple times. After the washing is completed, add it to a vacuum dryer for drying to complete the preparation of the modified montmorillonite.

[0058] The rotation speed of the centrifugal filter is 10000 rpm for 15 min. The temperature of the vacuum dryer is set at 80 °C, the pressure is -0.3 MPa, and the duration is 16 h. The conductivity of the third mixed solution is less than 50 μS / cm after washing.

[0059] Select lithium chloride solution and aramid pulp and add them to a water bath. The mass ratio of lithium chloride solution to aramid pulp is 20:1, the concentration of the lithium chloride solution is 20%, the temperature of the water bath is set at 90 °C, and the reaction is carried out for 6 h. After the reaction, take it out and wash it 8 times with distilled water, then transfer it to a petri dish and put it in a blast drying oven to dry at 120 °C to complete the preparation of the fiber-reinforced material.

[0060] A waterproof building material, comprising the following steps:

[0061] Step 1: Dry mixing: Weigh cement, modified konjac glucomannan, modified montmorillonite and fiber-reinforced material as required and place them in a dry powder mixer, mix at a rotation speed of 200 rpm for 12 min to obtain a mixture.

[0062] Step 2: Wet mixing, add the mixture, coupling agent, dispersant, defoaming agent and water to a planetary mixer, stir at 1000 rpm for 8 min, and the ratio of water to the total amount of the mixture, coupling agent, dispersant and defoaming agent is 1:0.4.

[0063] Step 3, molding, inject the wet-mixed material into a mold, vibrate to exhaust air, and cure at room temperature for 20 days to complete the preparation of the waterproof building material.

[0064] Comparative example one. The difference between this comparative example and experimental example one is that: this comparative example does not contain fiber-reinforced material.

[0065] Comparative example two. The difference between this comparative example and experimental example one is that: this comparative example does not carry out the modification of konjac glucomannan powder.

[0066] Comparative example three. The difference between this comparative example and experimental example one is that: in this comparative example, montmorillonite is not modified during preparation.

[0067] Comparative example four. The difference between this comparative example and experimental example one is that: in this comparative example, montmorillonite is not added during preparation.

[0068] Performance test: Carry out performance tests on the waterproof building materials treated in experimental example one, experimental example two, experimental example three, comparative example one, comparative example two, comparative example three and comparative example four.

[0069] The performance test includes: Install the cured waterproof building material on an impermeability tester, take 0.1 MPa as the initial pressure, increase 0.1 MPa every 1 hour until the specimen leaks water, record the maximum pressure value when the specimen leaks water, and the test standard is GB / T50082-2009.

[0070] High temperature resistance test: Put the cured waterproof building material into an oven at 100 °C and keep it at a constant temperature for 24 h. After cooling to room temperature, test the compressive strength, and the test standard is GB / T 50081-2019.

[0071] Flexural test: The flexural strength of the cured waterproof building material was tested by the three-point bending method using a universal material testing machine;

[0072] The obtained test data are recorded in the following table:

[0073]

[0074] By comparing and analyzing the relevant data in the table, it can be seen that the waterproof building material prepared by the present invention not only has good waterproof performance, but also has excellent mechanical properties, effectively improving the service life of the waterproof building material, and also has excellent hardness properties. This shows that the waterproof building material provided by the present invention has a broader market prospect and is more suitable for popularization.

[0075] In the description of this specification, the description with reference to terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0076] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and utilize the present invention well. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A waterproof building material, characterized in that, It consists of the following raw materials in parts by weight: 80 - 100 parts of cement, 8 - 15 parts of modified montmorillonite, 5 - 8 parts of modified konjac glucomannan, 3 - 5 parts of fiber reinforcing material, 1 - 3 parts of coupling agent, 1 - 3 parts of dispersant, and 0.1 - 0.5 parts of defoaming agent.

2. The waterproof building material according to claim 1, characterized in that, The coupling agent is one of γ-aminopropyltriethoxysilane or γ-glycidoxypropyltrimethoxysilane.

3. The waterproof building material according to claim 1, characterized in that, The dispersant is one of sodium polycarboxylate, sodium hexametaphosphate, or polyvinylpyrrolidone.

4. The waterproof building material according to claim 1, characterized in that, The defoaming agent is one of polydimethylsiloxane emulsion or BYK-022.

5. The waterproof building material according to claim 1, characterized in that The preparation steps of the modified konjac glucomannan are as follows: Select konjac glucomannan powder and ethanol and add them to the reaction kettle. The volume ratio of the konjac glucomannan powder to ethanol is 2:

8. After continuously stirring at 300 - 500 r / min for 10 - 30 min by the stirrer in the reaction kettle, adjust the rotation speed to 200 - 400 r / min and stir for 10 - 30 min. At the same time during the stirring process, continuously add acetic anhydride and dropwise add an acid-base regulator to adjust the pH value to 7 - 8. Then set the temperature to 40 - 60 °C and react for 2 - 4 h. During the reaction process, the stirrer continuously stirs at 100 - 200 r / min to obtain the first mixture. Wash and dry the first mixture to complete the preparation of the modified konjac glucomannan.

6. The waterproof building material according to claim 5, characterized in that, The molar ratio of the konjac glucomannan to acetic anhydride is 1:(1 - 3), and the ethanol concentration is 50%.

7. The waterproof building material according to claim 1, characterized in that, The preparation method of the modified montmorillonite is as follows: Select sodium-based montmorillonite, cetyltrimethylammonium bromide, and water and add them to a constant temperature water bath according to the ratio of 1:(0.5 - 1):(20 - 50). Set the temperature to 60 - 70 °C and continuously stir at 300 - 500 r / min for 5 - 6 h by a magnetic stirrer to obtain the second mixture. Perform centrifugation on the second mixture by a centrifugal filter to separate the solid and liquid phases. Then remove the supernatant to obtain the third mixed solution. Wash the third mixed solution with distilled water multiple times. After the washing is completed, add it to a vacuum dryer for drying to complete the preparation of the modified montmorillonite.

8. The waterproof building material according to claim 7, characterized in that, The rotation speed of the centrifugal filter is 8000 - 10000 rpm for 10 - 15 min. The temperature of the vacuum dryer is set to 60 - 80 °C, the pressure is -0.1 to -0.3 MPa, and the duration is 12 - 16 h. The conductivity of the third mixed solution after washing is less than 50 μS / cm.

9. The waterproof building material according to claim 1, characterized in that, The preparation method of the fiber reinforcing material is as follows: Select lithium chloride solution and aramid pulp and add them to a water bath. The mass ratio of the lithium chloride solution to aramid pulp is (10 - 20):1, the concentration of the lithium chloride solution is 20%, the temperature of the water bath is set to 80 - 90 °C, and react for 3 - 6 h. After the reaction, take it out and wash it 4 - 8 times with distilled water, then transfer it to a petri dish and put it in a blast drying oven to dry at 90 - 120 °C to complete the preparation of the fiber reinforcing material.

10. A waterproof building material, characterized in that, Using the waterproof building material according to any one of claims 1 to 9, includes the following steps: Step 1: Dry mixing: Weigh cement, modified konjac glucomannan, modified montmorillonite and fiber reinforcement materials as required and place them in a dry powder mixer. Mix at a rotation speed of 200 rpm for 10 - 12 minutes to obtain a mixture. Step 2: Wet mixing, Add the mixture, coupling agent, dispersant, defoaming agent and water to a planetary mixer. Stir at 1000 rpm for 5 - 8 minutes. The ratio of water to the total amount of the mixture, coupling agent, dispersant and defoaming agent is 1:(0.25:0.4). Step 3, Molding, Inject the wet-mixed material into a mold, vibrate to exhaust air, and cure at room temperature for 20 days to complete the preparation of the waterproof building material.

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