CN113880492B - Gypsum waterproof modifier and production method thereof, and damp-proof gypsum product and preparation method thereof - Google Patents

Gypsum waterproof modifier and production method thereof, and damp-proof gypsum product and preparation method thereof Download PDF

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CN113880492B
CN113880492B CN202111270767.2A CN202111270767A CN113880492B CN 113880492 B CN113880492 B CN 113880492B CN 202111270767 A CN202111270767 A CN 202111270767A CN 113880492 B CN113880492 B CN 113880492B
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gypsum
paraffin
waterproof
product
alkaline substance
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CN113880492A (en
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古斌
古松
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Sichuan Jipusen Building Materials Co ltd
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Sichuan Jipusen Building Materials Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • C04B40/0028—Aspects relating to the mixing step of the mortar preparation
    • C04B40/0039—Premixtures of ingredients
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/14—Producing shaped prefabricated articles from the material by simple casting, the material being neither forcibly fed nor positively compacted
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/60—Agents for protection against chemical, physical or biological attack
    • C04B2103/65—Water proofers or repellants
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20—Resistance against chemical, physical or biological attack
    • C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Abstract

The invention discloses a gypsum waterproof modifier and a production method thereof, a moistureproof gypsum product and a preparation method thereof, relates to the field of gypsum building materials, and solves the problem that the moistureproof and mildewproof effects of the gypsum product are not good due to the poor waterproof modification effect of gypsum in the prior art, and the key points of the technical scheme are as follows: through the combined action of the alkaline material wrapped by the paraffin and the waterproof agent, a good hydrophobic film can be generated on the surface of the gypsum. The gypsum waterproof modifier has better effect through the scheme, and the gypsum product has better damp-proof and mildew-proof effects.

Description

Gypsum waterproof modifier and production method thereof, and damp-proof gypsum product and preparation method thereof
Technical Field
The invention relates to the field of gypsum building materials, in particular to a gypsum waterproof modifier and a production method thereof, a moisture-proof gypsum product and a preparation method thereof.
Background
The main component of phosphogypsum is calcium sulfate dihydrate (CaSO) 4 ·2H 2 O), it is prepared as calcium sulfate hemihydrate (CaSO) 4 ·0.5H 2 O) as main component, and can be used for preparing gypsum building material products. The gypsum belongs to an air-setting cementing material, the solubility of the gypsum is 2.08g/L, and the problems of reduced mechanical property, moisture deformation, moisture absorption and mildew and the like can occur when the gypsum is applied in a humid environment in the south of China. In the prior art, gypsum is modified by methyl silicone oil products, but the effect is not ideal, so a new scheme needs to be found for modifying phosphogypsum to produce gypsum products.
Disclosure of Invention
In order to solve the above problems, the applicant has made extensive studies on the physicochemical reaction during the gypsum modification process and found that: when modified methyl silicone oil is adopted to carry out moisture-proof modification on phosphogypsum products, the pH value of a liquid phase environment is reduced by water-soluble phosphoric acid contained in phosphogypsum, so that the modified methyl silicone oil and hydroxyl in a solution can not be subjected to dehydration polymerization, a hydrophobic film with changed surface energy can not be formed on the surface of a gypsum crystal, and the improvement of the moisture-proof performance of the gypsum building material products is influenced. The pH of the liquid phase environment increases after the incorporation of the basic substance, but at the same time due to H + Reduction of (2) to CaOH - +SO 4 2- +H + →CaSO 4 ·2H 2 The reaction power of O is reduced, so that the setting time of the gypsum can not be regulated or even set,thereby affecting the stable production of gypsum products. There is therefore a need to find a suitable way of introducing an alkaline substance, which balances the waterproofing effect and the gypsum setting effect.
The invention provides a gypsum waterproof excitant, which is used for producing phosphogypsum products and can achieve good moisture resistance.
The technical purpose of the invention is realized by the following technical scheme:
a waterproof modifier for gypsum, which comprises a waterproof agent and an excitant; the waterproof agent is methyl silicone oil; the activator comprises alkaline substance wrapped by paraffin.
Wrapping alkaline substances by paraffin to delay the release time of the alkaline substances, wherein the early stage mainly comprises gypsum hydration and solidification reaction; gradually releases alkaline substances at the later stage (0.5-5 h) of gypsum hydration and improves OH in the system - And the modified methyl silicone oil and the hydroxyl in the solution can be subjected to polycondensation reaction smoothly to form a hydrophobic film. After the gypsum is modified by adopting the waterproof modifier, the waterproof performance of the gypsum can be improved on the basis of not influencing the hydration and condensation of the gypsum.
Further, the alkaline substance at least comprises one of cement, ash calcium, carbide slag and potassium hydroxide; the ratio of paraffin to alkaline substance is 4.
The alkaline substance is easily available. Meanwhile, according to different types of gypsum products, suitable alkaline substances can be selected. By adopting the proportion, the alkaline substance can be fully wrapped by the paraffin. The activator caking caused by excessive paraffin is avoided, and the waterproof modification effect is reduced; avoid the problems that the paraffin is too little, the alkaline substance can not be fully wrapped and the OH is released in advance - Reducing the gypsum setting rate.
The invention also provides a production method of the gypsum waterproof modifier, paraffin is mixed with alkaline substances, and the alkaline substances are wrapped by the paraffin to form an excitant; the activator and the waterproof agent are mixed to form the waterproof gypsum modifier. And stirring by adopting a stirrer in the mixing process of the paraffin and the alkaline substances for 2-20 min so that the alkaline substances can be fully wrapped by the paraffin.
The invention also provides a moisture-proof gypsum product which contains the gypsum waterproof modifier. On one hand, the gypsum waterproof agent is used in production; on the other hand, the gypsum waterproof modifier or the product thereof can be detected in the finished product of the gypsum product.
The invention also provides a preparation method of the moisture-proof gypsum product, which comprises the following steps:
a: mixing paraffin and alkaline substances to form an excitant;
b: stirring gypsum and an excitant for 20-600 s to form premixed dry powder;
c: stirring a waterproofing agent and water to form a mixed solution;
d: mixing the dry powder with the solution, and stirring for 20-60 s to form slurry;
e: pouring the slurry into a forming mold, and demolding to form the moisture-proof gypsum product after solidification and hardening.
Further provides a preparation method of the moisture-proof gypsum product, wherein the gypsum product is a gypsum block; the gypsum is building gypsum; the alkaline substance is cement; the ratio of paraffin to cement in the excitant is 2.5-2; and adding the reinforcing material in the step B and stirring the reinforcing material and the mixture.
The strength of the gypsum product can be increased by adding the reinforcing material in the production. The reinforcing material is at least one of glass fiber, polypropylene fiber and basalt fiber.
Further, a reinforcing material is added in the step B and stirred together.
And C, adding a retarder and stirring the retarder and the retarder together.
The strength of the gypsum product can be increased by adding the reinforcing material in the production. The reinforcing material is at least one of glass fiber, polypropylene fiber and basalt fiber. The length of the fiber is 6-20 mm.
The retarder is added in the production, so that the gypsum setting time is prolonged within a certain range, the slurry is convenient to transfer to a mould, and the problem that the production cannot be finished due to setting in the transfer process is avoided.
Further, a method for preparing a moisture-proof gypsum product, wherein the gypsum product is a gypsum hollow ribbon board; the gypsum is a mixture of building gypsum and high-strength gypsum, and the ratio of the building gypsum to the high-strength gypsum is 6; the alkaline substance is carbide slag; the ratio of paraffin to carbide slag in the excitant is 2.5-2.
Further, the preparation method of the moisture-proof gypsum product is characterized by comprising the following steps: the gypsum product is a decorative gypsum product; the gypsum is high-strength gypsum; the alkaline substance is potassium hydroxide; ratio of paraffin to potassium hydroxide in the excitant is 3.
Further, a preparation method of the moisture-proof gypsum product is characterized by comprising the following steps: the gypsum product is a paperless gypsum board; the gypsum is a mixture of building gypsum and high-strength gypsum, and the proportion of the building gypsum to the high-strength gypsum is 2; the alkaline substance is ash calcium; the ratio of paraffin to gray calcium in the excitant is 2.5 to 2.
The invention provides a production formula of a moisture-proof gypsum product, which comprises the following components: 95 to 100 portions of gypsum, 0.1 to 3.0 portions of waterproof agent, 0.5 to 5.0 portions of excitant and 35 to 80 portions of water.
Further comprises 0 to 1.0 portion of retarder and 0.1 to 1 portion of reinforcing material.
Further, the gypsum is at least one of high-strength gypsum and building gypsum; the waterproof agent is at least one of sodium methyl silicate, methyl hydrogen silicone oil and methyl silicone resin; the retarder is at least one of carboxylic acid, carboxylate, phosphate, protein retarder and amino acid retarder; the reinforcing material is at least one of glass fiber, polypropylene fiber and basalt fiber.
Further the activator comprises paraffin-coated alkaline substances; the alkaline substance at least comprises one of cement, ash calcium, carbide slag and potassium hydroxide; the ratio of paraffin to alkaline substance is 4.
The basic substance in the present invention means a substance capable of releasing OH - Not a substance that supplies electrons in a broad sense.
The paraffin wax in the present invention may be emulsified paraffin wax or solid paraffin wax, and the solid paraffin wax needs to be dissolved by heating when used, and is mixed with an alkaline substance in a dissolved state.
The gypsum of the invention is mainly phosphogypsum.
The wrapping is to mix alkaline substances and paraffin to form granular substances or powdery substances with certain particle size. The inside of the granular material is alkaline material, and the outside is covered with paraffin.
After the phosphogypsum product produced by adopting the scheme is dried at the temperature of 45 +/-2 ℃, the weight increase of the phosphogypsum product soaked in water for 2 hours is less than or equal to 3.5 percent and is higher than the national standard by 30 percent; the compression strength softening coefficient is more than or equal to 0.6 after the water immersion for 48 hours, and the national standard is reached. And a good waterproof effect is achieved. The water absorption of the gypsum can be reduced, the moisture-proof effect is good, and the gypsum is not easy to mildew, so that a good use effect is achieved.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more apparent, the present invention is further described in detail below with reference to the embodiments.
Examples
Embodiments provide a gypsum waterproof modifier, including a waterproof agent and an activator; the waterproof agent is at least one of sodium methyl silicate, methyl hydrogen silicone oil and methyl silicone resin; the excitant comprises a paraffin-coated alkaline substance.
According to different use scenes, different alkaline substances can be selected to be matched with the paraffin to form different types of excitants. Common usage scenarios and corresponding coordination methods are as follows:
usage scenarios Type of trigger Amount of paraffin wax used Alkaline substance
For gypsum block Cement base 40 percent of paraffin 60 percent of cement
For hollow gypsum laths Carbide slag base Paraffin wax 40% Carbide slag 60%
For gypsum decorative products Potassium hydroxide radical Paraffin wax 30% 70 percent of potassium hydroxide
For gypsum board without paper surface Ash calcium base 40 percent of paraffin 60 percent of gray calcium
The percentages in the above table are percentages by mass of the substances in the excitant.
According to different use scenes, different waterproof agents can be selected to be matched with the exciting agent to form different types of waterproof modifiers.
Usage scenarios Amount of water repellent Amount of exciting agent
For gypsum block Sodium methylsilicate 3 parts 3 portions of cement base
For hollow gypsum lath Methyl hydrogen silicone oil 1 part Carbide slag base 5 parts
For gypsum decorative products 2 parts of methyl silicone resin 0.5 part of potassium hydroxide group
For gypsum board without paper surface 2 parts of sodium methylsilicate 1 part of ash calcium base
The parts in the above table are in units based on mass of the material.
In the practical use of the paraffin, the emulsified paraffin or the solid paraffin can be selected according to the purchasing convenience of the raw materials. When solid paraffin is used for wrapping, the solid paraffin should be melted first. After melting, mixing with alkaline substances, and finally mixing with a waterproof agent to form a final product.
The different formulas in the use scene do not represent that only the formula can achieve the waterproof modification effect. The adjustment of the formulation under the inventive concept is within the scope of the protection claimed in this patent.
The product can be made into different forms according to different use conditions. For example, the preparation may be in the form of granules or powder, or may be in the form of a solution or suspension by adding water. In either form, the scope of protection afforded by this patent is considered to be within the scope of this patent.
The embodiment also provides a production method of the gypsum waterproof modifier, which comprises the following steps:
mixing paraffin and alkaline substances, and wrapping the alkaline substances with the paraffin to form an exciting agent; the alkaline substance and the paraffin are mixed and stirred by a stirrer for 1-20 min.
Mixing an exciting agent and a waterproof agent to form a gypsum waterproof modifier; the excitant and the waterproof agent are mixed by a stirrer for 1-20 min.
The materials in the above process can be referred to the relevant ratios in example 1.
If solid paraffin is adopted, the implementation also comprises the step of melting the paraffin.
The stirring time in the above examples is determined by the amount of the mixture to be mixed.
If the final product adopts a solution as the product form, the embodiment also comprises the step of adding water into the gypsum waterproof modifier and stirring.
The present embodiments also provide a moisture resistant gypsum-containing product.
In the process of manufacturing the gypsum product, an alkaline substance wrapped by paraffin is added as an initiator and a waterproof agent; alkaline substances wrapped by paraffin and a hydrophobic film formed by the waterproof agent can be detected in the finished product of the gypsum product.
The alkaline substance at least comprises one of cement, ash calcium, carbide slag and potassium hydroxide.
The water-proofing agent at least comprises one of methyl sodium silicate, methyl hydrogen silicone oil and methyl silicone resin.
The present example also provides a method of making a moisture resistant gypsum-containing product comprising the steps of:
a: mixing paraffin and alkaline substances, and wrapping the alkaline substances with the paraffin to form a propellant; the alkaline substance at least comprises one of cement, ash calcium, carbide slag and potassium hydroxide.
B: stirring gypsum and an excitant for 20-120 s to form premixed dry powder; in part of gypsum products, a reinforcing material is added to improve the gypsum products to obtain higher strength; the reinforcing material is at least one of glass fiber, polypropylene fiber and basalt fiber; the gypsum is one or two of building gypsum or high-strength gypsum.
C: stirring a waterproofing agent and water to form a mixed solution; a retarding material needs to be added into part of the gypsum product, so that the phenomenon that slurry is rapidly condensed in the transferring process to cause the failure of entering a mold is avoided; the retarder is at least one of carboxylic acid, carboxylate, phosphate, protein retarder and amino acid retarder; the waterproof agent is at least one of sodium methyl silicate, methyl hydrogen silicone oil and methyl silicone resin.
D: mixing the dry powder with the solution, and stirring for 20-60 s to form slurry;
e: pouring the slurry into a forming mold, and demolding to form the moisture-proof gypsum product after solidification and hardening.
The formula of the production process comprises 95-100 parts of gypsum, 0.1-3.0 parts of waterproof agent, 0-1.0 part of retarder, 0.5-5.0 parts of excitant, 0.1-1 part of reinforcing material and 35-80 parts of water.
The gypsum is at least one of high-strength gypsum and building gypsum; the waterproof agent is at least one of sodium methylsilicate, methyl hydrogen silicone oil and methylsilicone resin; the retarder is at least one of carboxylic acid, carboxylate, phosphate, protein retarder and amino acid retarder; the reinforcing material is at least one of glass fiber, polypropylene fiber and basalt fiber; the excitant comprises a paraffin-coated alkaline substance; the alkaline substance at least comprises one of cement, ash calcium, carbide slag and potassium hydroxide; the ratio of paraffin to alkaline substance is 4.
In order to better clarify the advantages of the present embodiment. Example 1, comparative example 1 and comparative example 2 compare the water absorption of 2h and the setting time of several common moisture-proof gypsum products.
Example 1
Example 1 a method of making a moisture resistant gypsum-containing product, comprising the steps of:
a: mixing paraffin and alkaline substances, and wrapping the alkaline substances with paraffin to form a stimulant; the alkaline substance at least comprises one of cement, ash calcium, carbide slag and potassium hydroxide.
B: stirring gypsum and an excitant for 20-120 s to form premixed dry powder; in part of gypsum products, reinforcing materials are added to improve the gypsum products to obtain higher strength; the reinforcing material is at least one of glass fiber, polypropylene fiber and basalt fiber; the gypsum is one or two of building gypsum or high-strength gypsum.
C: stirring a waterproofing agent and water to form a mixed solution; a retarding material needs to be added into part of the gypsum product, so that the phenomenon that slurry is rapidly condensed in the transfer process to cause failure in mold entering is avoided; the retarder is at least one of carboxylic acid, carboxylate, phosphate, protein retarder and amino acid retarder; the waterproof agent is at least one of sodium methyl silicate, methyl hydrogen silicone oil and methyl silicone resin.
D: mixing the dry powder with the solution, and stirring for 20-60 s to form slurry;
e: pouring the slurry into a forming mold, and demolding to form the moisture-proof gypsum product after solidification and hardening.
The specific formula is as follows:
Figure BDA0003328671190000101
comparative example 1:
comparative example 1 a method of making a moisture resistant gypsum-containing product comprising the steps of:
a: stirring gypsum and an excitant for 20-120 s to form premixed dry powder; in part of gypsum products, reinforcing materials are added to improve the gypsum products to obtain higher strength; the reinforcing material is at least one of glass fiber, polypropylene fiber and basalt fiber; the gypsum is one or two of building gypsum or high-strength gypsum.
B: stirring a waterproofing agent and water to form a mixed solution; a retarding material needs to be added into part of the gypsum product, so that the phenomenon that slurry is rapidly condensed in the transferring process to cause the failure of entering a mold is avoided; the retarder is at least one of carboxylic acid, carboxylate, phosphate, protein retarder and amino acid retarder; the waterproof agent is at least one of sodium methyl silicate, methyl hydrogen silicone oil and methyl silicone resin.
C: mixing the dry powder with the solution, and stirring for 20-60 s to form slurry;
d: pouring the slurry into a forming mold, and demolding to form the moisture-proof gypsum product after solidification and hardening. The specific formula is as follows:
Figure BDA0003328671190000111
Figure BDA0003328671190000121
comparative example 2
Comparative example 2 a method of making a moisture resistant gypsum product comprising the steps of:
a: stirring the gypsum reinforcing material to form premixed dry powder; the reinforcing material is at least one of glass fiber, polypropylene fiber and basalt fiber; the gypsum is one or two of building gypsum or high-strength gypsum.
B: stirring a waterproofing agent and water to form a mixed solution; a retarding material needs to be added into part of the gypsum product, so that the phenomenon that slurry is rapidly condensed in the transferring process to cause the failure of entering a mold is avoided; the retarder is at least one of carboxylic acid, carboxylate, phosphate, protein retarder and amino acid retarder; the waterproof agent is at least one of sodium methyl silicate, methyl hydrogen silicone oil and methyl silicone resin.
C: mixing the dry powder with the solution, and stirring for 20-60 s to form slurry;
d: and pouring the slurry into a forming die, solidifying and hardening, and demolding to form the moisture-proof gypsum product.
The specific formula is as follows:
Figure BDA0003328671190000131
the test conditions of the above tests are consistent.
On the basis of comparing example 1 with comparative examples 1 and 2, the following conclusions were drawn:
1. as can be seen from example 1 and comparative example 1. Compared with the method using a simple alkaline substance as an exciting agent, the method has the advantage that the setting time of the gypsum product is accelerated by over 60 percent by wrapping the exciting agent with paraffin.
2. As can be seen from example 1 and comparative example 2. Compared with the method without adding the excitant, the water absorption of the gypsum product is reduced by more than 90% after the excitant coated by the paraffin is added for 2 hours. The reduction of the water absorption rate shows that the gypsum product has better waterproof and moistureproof effects.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims (10)

1. A gypsum waterproof modifier is characterized in that: comprises a waterproof agent and an exciting agent; the activator comprises paraffin-coated alkaline substance.
2. The waterproof gypsum modifier as set forth in claim 1, wherein: the alkaline substance at least comprises one or more of cement, ash calcium, carbide slag and potassium hydroxide; the ratio of paraffin to alkaline substance is 4 to 4; the waterproof agent is at least one of sodium methyl silicate, methyl hydrogen silicone oil and methyl silicone resin.
3. A production method of a gypsum waterproof modifier comprises the following steps:
mixing paraffin and alkaline substances, and wrapping the alkaline substances with the paraffin to form an excitant;
the excitant and the waterproof agent are mixed to form the gypsum waterproof modifier.
4. A moisture-proof gypsum product, characterized by: comprising the gypsum water-proofing modifier of claim 1.
5. A method of making a moisture resistant gypsum product comprising the steps of:
a: mixing paraffin and an alkaline substance, and coating the alkaline substance with the paraffin to form an excitant;
b: stirring gypsum and an excitant for 20-600 s to form premixed dry powder;
c: stirring a waterproofing agent and water to form a mixed solution;
d: mixing the dry powder with the solution, and stirring for 20-60 s to form slurry;
e: and pouring the slurry into a forming mold, and demolding to form the moisture-proof gypsum product after solidification and hardening.
6. The method of claim 5, wherein the moisture resistant gypsum product comprises:
adding a reinforcing material in the step B and stirring the reinforcing material and the reinforcing material together;
and C, adding a retarder and stirring the mixture together.
7. The production formula of the moisture-proof gypsum product is characterized in that: the production formula comprises the following components: 95 to 100 portions of gypsum, 0.1 to 3.0 portions of waterproof agent, 0.5 to 5.0 portions of excitant and 35 to 80 portions of water; the activator comprises paraffin-coated alkaline substance.
8. The production formula of the moisture-proof gypsum product as claimed in claim 7, further comprising 0-1.0 part of retarder and 0.1-1 part of reinforcing material.
9. The formulation of claim 8, wherein the formulation is selected from the group consisting of: the gypsum is at least one of high-strength gypsum and building gypsum; the waterproof agent is at least one of sodium methyl silicate, methyl hydrogen silicone oil and methyl silicone resin; the retarder is at least one of carboxylic acid, carboxylate, phosphate, protein retarder and amino acid retarder; the reinforcing material is at least one of glass fiber, polypropylene fiber and basalt fiber.
10. The method of claim 7, wherein the moisture resistant gypsum product comprises: the alkaline substance at least comprises one of cement, ash calcium, carbide slag and potassium hydroxide; the ratio of paraffin to alkaline substance is 4 to 4.
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