CN114409294B - Application of alkyl quaternary ammonium salt as gypsum coagulant and composite gypsum coagulant - Google Patents

Application of alkyl quaternary ammonium salt as gypsum coagulant and composite gypsum coagulant Download PDF

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Publication number
CN114409294B
CN114409294B CN202210117194.8A CN202210117194A CN114409294B CN 114409294 B CN114409294 B CN 114409294B CN 202210117194 A CN202210117194 A CN 202210117194A CN 114409294 B CN114409294 B CN 114409294B
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gypsum
quaternary ammonium
ammonium salt
coagulant
alkyl quaternary
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CN114409294A (en
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冯有愉
冯麒合
冯超
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Zhongxiang New Material Dalian Co ltd
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Zhongxiang New Material Dalian 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
    • 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
    • C04B2103/10—Accelerators; Activators
    • C04B2103/12—Set accelerators

Abstract

The invention relates to the technical field of gypsum dry powder mortar, and provides application of alkyl quaternary ammonium salt as a gypsum coagulant and a composite gypsum coagulant. The alkyl quaternary ammonium salt is used as the gypsum coagulant, so that the initial and final setting time of the gypsum mortar can be effectively controlled; furthermore, the alkyl quaternary ammonium salt and the inorganic gypsum coagulant are matched for use, so that a synergistic effect can be achieved, the initial and final setting time of the gypsum mortar is accurately controlled, the qualification rate of the gypsum mortar is greatly improved, the use amount of industrial gypsum such as citric acid gypsum, fluorgypsum and the like in the building dry powder mortar is increased, the waste is really changed into valuable, and the use amount of the inorganic coagulant in the gypsum-based dry powder mortar can be reduced.

Description

Application of alkyl quaternary ammonium salt as gypsum coagulant and composite gypsum coagulant
Technical Field
The invention relates to the technical field of gypsum dry powder mortar, in particular to application of alkyl quaternary ammonium salt as a gypsum coagulant and a composite gypsum coagulant.
Background
The gypsum-based dry powder mortar is a dry powder material for painting, which is formed by taking gypsum with setting property as a main raw material and mixing various additives, dry sand and the like, wherein the gypsum with the setting property comprises alpha-semi-hydrated gypsum, beta-semi-hydrated gypsum, anhydrous II-type gypsum, anhydrous III-type gypsum and the like.
In GBT28627-2012, the gypsum-based dry powder mortar has an initial setting time of not less than 1h and a final setting time of not more than 8h when in use. However, in the actual use process, the difference of gypsum crystal structure and components can be caused by different sources of gypsum, different gypsum calcining equipment and the like, and the use effect of gypsum powder in dry powder mortar is influenced. Taking industrial citric acid gypsum as an example, the alpha-hemihydrate gypsum or the beta-hemihydrate gypsum sintered by the industrial citric acid gypsum dihydrate often has the problems of normal initial setting, long final setting or no final setting in the application of gypsum-based dry powder mortar, and influences the application of the industrial citric acid gypsum; the main component of the industrial fluorgypsum is anhydrous II type gypsum crystal, the natural initial setting time is usually 9-72 h, and the use of the fluorgypsum in gypsum-based dry powder mortar is influenced due to the overlong initial setting time; and phosphogypsum generated in the process of producing phosphoric acid by a semidry method, desulfurized fly ash generated in the process of dry desulfurization in a steel mill and the like can not be normally solidified, and the initial setting time and the final setting time are required by national standards.
The gypsum coagulant is an important additive in gypsum dry powder mortar, and the main function of the gypsum coagulant is to adjust the initial and final setting time of the gypsum mortar so as to ensure that the gypsum-based mortar achieves the best use effect. At present, the commonly used gypsum coagulant is inorganic gypsum coagulant, including dihydrate gypsum powder, anhydrous aluminum sulfate, anhydrous sodium sulfate, etc., which can quickly form inorganic salt products with crystal water when meeting water, thereby promoting the setting of gypsum-based mortar. However, the inorganic coagulant has a poor accelerating effect, and when the inorganic coagulant is applied to the gypsum-based dry powder mortar which is difficult to be normally solidified, the initial and final setting time of the mortar cannot meet the national standard.
Disclosure of Invention
In view of the above, the present invention provides an application of alkyl quaternary ammonium salt as gypsum coagulant and a composite gypsum coagulant. According to the invention, the alkyl quaternary ammonium salt is used as the gypsum coagulant, so that the initial and final setting time of the gypsum-based dry powder mortar can be effectively controlled, and the qualification rate of the gypsum mortar is greatly improved.
In order to achieve the above object, the present invention provides the following technical solutions:
the alkyl quaternary ammonium salt is used as a gypsum coagulant, and the alkyl quaternary ammonium salt is one or more of C5-C32 alkyl quaternary ammonium salts.
Preferably, the quaternary alkyl ammonium salt is a solid quaternary alkyl ammonium salt.
Preferably, the alkyl quaternary ammonium salt is one or more of dodecyl trimethyl ammonium chloride, dodecyl trimethyl ammonium bromide, tetradecyl trimethyl ammonium bromide and tetradecyl dimethyl benzyl ammonium chloride.
Preferably, the alkyl quaternary ammonium salt is used in combination with an inorganic gypsum coagulant; the inorganic gypsum coagulant comprises one or more of dihydrate gypsum powder, anhydrous aluminum sulfate, anhydrous sodium sulfate and anhydrous potassium sulfate.
Preferably, the mass fraction of the alkyl quaternary ammonium salt is 1-95% based on 100% of the total weight of the alkyl quaternary ammonium salt and the inorganic gypsum coagulant.
The invention also provides a composite gypsum coagulant, which comprises alkyl quaternary ammonium salt and inorganic gypsum coagulant, wherein the mass fraction of the alkyl quaternary ammonium salt in the composite gypsum coagulant is 1-95%.
Preferably, the inorganic gypsum coagulant is dihydrate gypsum powder, and the mass ratio of the dihydrate gypsum powder to the alkyl quaternary ammonium salt is (4.5-9): 1.
Preferably, the inorganic gypsum coagulant is anhydrous sodium sulfate and anhydrous aluminum sulfate; the mass ratio of the anhydrous sodium sulfate to the anhydrous aluminum sulfate to the alkyl quaternary ammonium salt is (3-4.5) to (1-3); or, the inorganic gypsum coagulant is anhydrous potassium sulfate and anhydrous aluminum sulfate; the mass ratio of the anhydrous potassium sulfate to the anhydrous aluminum sulfate to the alkyl quaternary ammonium salt is (3-4.5) to (1-3).
Preferably, the inorganic gypsum coagulant is dihydrate gypsum powder, anhydrous sodium sulfate and anhydrous aluminum sulfate; the mass ratio of the dihydrate gypsum powder to the anhydrous sodium sulfate to the anhydrous aluminum sulfate to the alkyl quaternary ammonium salt is (3-5) to (1-3) to (1-2.5) to (0.1-1); or the inorganic gypsum coagulant is dihydrate gypsum powder, anhydrous potassium sulfate and anhydrous aluminum sulfate; the mass ratio of the dihydrate gypsum powder to the anhydrous potassium sulfate to the anhydrous aluminum sulfate to the alkyl quaternary ammonium salt is (3-5) to (1-3) to (1-2.5) to (0.1-1).
The invention also provides application of the composite gypsum coagulant in the scheme in gypsum-based dry powder mortar.
The invention provides the use of alkyl quaternary ammonium salts as gypsum set accelerators. According to the invention, alkyl quaternary ammonium salt is used as a gypsum coagulant, so that the initial and final setting time of the gypsum mortar can be effectively controlled; furthermore, the alkyl quaternary ammonium salt and the inorganic gypsum coagulant are matched for use, so that a synergistic effect can be achieved, the initial and final setting time of the gypsum mortar is accurately controlled, the qualification rate of the gypsum mortar is greatly improved, the use amount of industrial gypsum such as citric acid gypsum, fluorgypsum and the like in the building dry powder mortar is increased, the waste is turned into wealth, and the use amount of the inorganic coagulant in the gypsum-based dry powder mortar can be reduced by 50-80%.
Detailed Description
The invention provides an application of alkyl quaternary ammonium salt as a gypsum coagulant. In the invention, the alkyl quaternary ammonium salt is preferably solid alkyl quaternary ammonium salt, in particular solid powdery alkyl quaternary ammonium salt; the alkyl quaternary ammonium salt is one or more of C5-C32 alkyl quaternary ammonium salts, more preferably C8-C25 alkyl quaternary ammonium salts, and further preferably C12-C20 alkyl quaternary ammonium salts, and in the specific embodiment of the invention, the alkyl quaternary ammonium salt is preferably one or more of dodecyl quaternary ammonium salt and tetradecyl quaternary ammonium salt; the quaternary alkyl ammonium salt is preferably hydrochloride or bromate; in a specific embodiment of the present invention, the quaternary alkylammonium salts are preferably one or more selected from dodecyltrimethylammonium chloride, dodecyltrimethylammonium bromide, tetradecyltrimethylammonium bromide and tetradecyldimethylbenzylammonium chloride. The four alkyl quaternary ammonium salts are preferably adopted in the invention, and the coagulation accelerating effect is the best.
In the present invention, the quaternary alkyl ammonium salt is preferably used in combination with an inorganic gypsum accelerator; the inorganic gypsum coagulant preferably comprises one or more of dihydrate gypsum powder, anhydrous aluminum sulfate, anhydrous sodium sulfate and anhydrous potassium sulfate, and more preferably comprises two or three of dihydrate gypsum powder, anhydrous aluminum sulfate, anhydrous sodium sulfate and anhydrous potassium sulfate. In the present invention, the mass fraction of the quaternary alkylammonium salt is preferably 1 to 95%, more preferably 5 to 90%, and still more preferably 15 to 80%, based on 100% by weight of the total amount of the quaternary alkylammonium salt and the inorganic gypsum accelerator. The alkyl quaternary ammonium salt and the inorganic gypsum coagulant are scientifically combined, so that the initial and final setting time of the dry powder gypsum mortar can be accurately controlled (specifically, the initial and final setting speed of the gypsum added by the alkyl quaternary ammonium salt can be controlled, the larger the addition amount is, the shorter the initial and final setting time is), the use amount of industrial gypsum in the building dry powder mortar is increased, and the use amount of the inorganic gypsum coagulant can be greatly reduced.
The invention also provides a composite gypsum coagulant, which comprises alkyl quaternary ammonium salt and inorganic gypsum coagulant; the mass fraction of the alkyl quaternary ammonium salt in the composite gypsum coagulant is 1-95%, preferably 5-90%, and more preferably 15-80%; the optional types of the alkyl quaternary ammonium salt and the inorganic gypsum coagulant are consistent with the scheme, and are not described in detail herein.
In the invention, when the inorganic gypsum coagulant in the composite gypsum coagulant is dihydrate gypsum powder, the mass ratio of the dihydrate gypsum powder to the alkyl quaternary ammonium salt is preferably (4.5-9): 1, and more preferably (5-8.5): 1.
In the invention, when the inorganic gypsum coagulant in the composite gypsum coagulant is anhydrous sodium sulfate and anhydrous aluminum sulfate, the mass ratio of the anhydrous sodium sulfate, the anhydrous aluminum sulfate and the alkyl quaternary ammonium salt is preferably (3-4.5) to (1-3), more preferably (3.5-4) to (1.5-2.5); when the inorganic gypsum coagulant is anhydrous potassium sulfate and anhydrous aluminum sulfate, the mass ratio of the anhydrous potassium sulfate, the anhydrous aluminum sulfate and the alkyl quaternary ammonium salt is preferably (3-4.5) to (1-3), and more preferably (3.5-4) to (1.5-2.5).
In the invention, when the inorganic gypsum coagulant in the composite gypsum coagulant is dihydrate gypsum powder, anhydrous sodium sulfate and anhydrous aluminum sulfate, the mass ratio of the dihydrate gypsum powder, the anhydrous sodium sulfate, the anhydrous aluminum sulfate and the alkyl quaternary ammonium salt is preferably (3-5) to (1-3) to (1-2.5) to (0.1-1), more preferably (3.5-4.5) to (1.5-2) to (0.3-0.5); when the inorganic gypsum coagulant is dihydrate gypsum powder, anhydrous potassium sulfate and anhydrous aluminum sulfate, the mass ratio of the dihydrate gypsum powder, the anhydrous potassium sulfate, the anhydrous aluminum sulfate and the alkyl quaternary ammonium salt is preferably (3-5) to (1-3) to (1-2.5) to (0.1-1), more preferably (3.5-4.5) to (1.5-2) to (0.3-0.5).
The preparation method of the composite gypsum coagulant has no special requirements, and the alkyl quaternary ammonium salt and the inorganic gypsum coagulant are uniformly mixed according to the proportion.
The invention also provides the application of the composite gypsum coagulant in the proposal in gypsum-based dry powder mortar; the gypsum-based dry powder mortar is preferably citric acid gypsum-based dry powder mortar or fluorine gypsum-based dry powder mortar; in the present invention, the amount of the composite gypsum accelerator added to the gypsum-based dry powder mortar is preferably 0.1 to 25 kg/ton, and more preferably 5 to 20 kg/ton. In the present invention, the amount of the composite gypsum setting accelerator is related to the proportion of gypsum in the mortar and the properties of the gypsum, and in the embodiment of the present invention, it is preferable to adjust the amount of the composite gypsum setting accelerator according to the circumstances and the desired initial setting time.
In the invention, the gypsum-based dry powder mortar is preferably gypsum putty, gypsum-based self-leveling mortar, gypsum plastering mortar, light gypsum mortar or light heat-insulating gypsum mortar; the formula of the gypsum-based dry powder mortar is not particularly required, and the composite gypsum coagulant is added by adopting the formula well known to the skilled person.
In the specific embodiment of the invention, the gypsum putty is preferably fluorine gypsum putty, citric acid gypsum putty or water-resistant gypsum putty, and the specific formula is shown in tables 1-3:
TABLE 1 Fluorogypsum putty formulation
Name of raw material Dosage (kg/ton)
Fluorgypsum 400～600
Calcium hydroxide 40～60
Sand 400～500
Composite gypsum coagulant 2～6
Hydroxypropyl methylcellulose (HPMC) 1～5
Lubricant agent 0.5～2
Thixotropic agent 0.5～2
In Table 1, the mesh number of the fluorgypsum is preferably 120 to 200 meshes, and the calcium hydroxide is preferably industrial grade calcium hydroxide, wherein Ca (OH) 2 Preferably greater than or equal to 90%, the HPMC has NDJ-1,2% viscosity of preferably 7 ten thousand cps, the lubricant is preferably UNNM-WT04, and the thixotropic agent is preferably AMS980.
TABLE 2 citric acid plaster putty formulation
Name of raw material Dosage (kg/ton)
Citric acid gypsum 20～950
Heavy calcium carbonate 25～950
Lime calcium 25～300
Cellulose ethers 1.5～5
Construction aid 0.5～5
Composite gypsum coagulant 0.1～5
In table 2, the whiteness of the citric acid gypsum is preferably > 85%, and the folding pressure is preferably 2.5MPa; the mesh number of the heavy calcium carbonate is preferably 350 meshes, the invention has no special requirement on the type of the construction aid in the table 2, and the construction aid which is well known to a person skilled in the art can be selected, specifically, the construction aid comprises an air entraining type, a mineral type, a starch type construction aid and the like.
TABLE 3 Water-resistant Gypsum putty formulation
Name of raw material Dosage (kg/ton)
Citric acid gypsum 20～950
Heavy calcium carbonate 25～300
Lime calcium 25～950
Cellulose ethers 0.5～8
Construction aid 0.5～5
Composite gypsum coagulant 0.1～5
In table 3, the whiteness of the citric acid gypsum is preferably > 85%, and the folding pressure is preferably 2.5MPa; the mesh number of the heavy calcium carbonate is preferably 350 meshes; in the present invention, the construction aid in Table 3 is preferably a mineral type construction aid, and specifically can be produced by Mitsubishi (Dalian) Co., ltd
Figure BDA0003496887850000061
Thixotropic lubricant AMS980S.
In a specific embodiment of the invention, the formulation of the gypsum-based self-leveling mortar (citric acid gypsum-based self-leveling mortar) is shown in table 4:
TABLE 4 formula of citric acid gypsum-based self-leveling mortar
Name of raw material Dosage (kg/ton)
Alpha-hemihydrate gypsum (citric acid gypsum) 400～600
Cement mortar 30～40
Calcium hydroxide 10～20
Sand 400～500
Composite coagulant 1～4
Hydroxypropyl methylcellulose (HPMC) 0.5～1.5
Water reducing agent 1～2
Defoaming agent 0.5～1.5
Leveling agent 0.5～1.5
Polyamino acid retarder 0.4～0.6
In table 4, the 2h flexural strength of the alpha-hemihydrate gypsum is preferably 4.5MPa; the type of the cement is preferably 42.5R; the calcium hydroxide is preferably industrial grade calcium hydroxide, wherein Ca (OH) 2 The content of (b) is preferably more than or equal to 90%; the mesh number of the sand is preferably 50-120 meshes; the NDJ-1,2% viscosity of the HPMC is preferably 400cps; the type of the water reducing agent is preferably UNNM-AD43G, the type of the defoaming agent is preferably UNNM-AD42A, the type of the leveling agent is preferably UNNM-AD47P, and the type of the polyamino acid retarder is preferably UNNM-GR25.
In a specific embodiment of the invention, the formulation of the gypsum plastering mortar is shown in table 5:
TABLE 5 Gypsum plastering mortar formula
Name of raw material Dosage (kg/ton)
Fluorgypsum 200～800
Heavy calcium carbonate 50～700
Sand 100～700
Cellulose ethers 0.5～5
Construction aid 0.5～5
Composite gypsum coagulant 0.5～5
In table 5, the folding pressure of the fluorgypsum is preferably 3.5MPa, the mesh number of the coarse whiting is preferably 150-250 meshes, and the mesh number of the sand is preferably 50-70 meshes, the invention has no special requirement on the types of the construction aids in table 5, and the construction aids known by the technicians in the field can be selected, specifically, the construction aids include air-entraining type, mineral type, starch type construction aids and the like.
In a specific embodiment of the invention, the formulation of the light gypsum mortar is shown in table 6:
TABLE 6 light Gypsum mortar formulation
Name of raw material Dosage (kg/ton)
Fluorgypsum 300～950
Portland cement 10～300
Sand 50～500
Expanded perlite 5～100
Cellulose ethers 0.5～5
Construction aid 0.5～5
Composite gypsum coagulant 0.3～5
In Table 6, the flexural strength of the fluorogypsum is preferably 3.5MPa, the type of the portland cement is preferably 42.5R, the mesh number of the sand is preferably 30 to 70 meshes, and the density of the boronized perlite is preferably 100kg/m 3 (ii) a The invention has no special requirements on the types of the construction aids in the table 6, and the construction aids known by the technicians in the field can be selected, such as air-entraining type, mineral type, starch type construction aids and the like, and when the construction aids are specifically applied, the construction aids can improve the hand feeling of workers during plastering, achieve the effects of lightness and comfort,The construction efficiency is improved.
In the specific embodiment of the invention, the formula of the light heat-insulating gypsum mortar is shown in table 7:
TABLE 7 light heat-insulating gypsum mortar formula
Name of raw material Dosage of
Citric acid gypsum 500-950 kg/ton
Puffed pearl sand 1～3m 3 Per ton of
Cellulose ethers 1-8 kg/ton
Construction aid 1-5 kg/ton
Composite gypsum coagulant 1-5 kg/ton
In Table 7, the folding pressure of the citric acid gypsum is preferably 3.5MPa, and the density of the expanded perlite is preferably 55-75 kg/m 3 (ii) a The invention has no special requirements on the types of the construction aids in the table 7, and the construction aids known to the technicians in the field can be selected, such as air-entraining type, mineral type, starch type construction aids and the likeFruit and improvement of construction efficiency.
The use method of the composite gypsum coagulant has no special requirements, and the composite gypsum coagulant and other raw materials in the formula of the gypsum-based dry powder mortar are directly stirred and mixed in the preparation of the gypsum-based dry powder mortar.
In the invention, the composite gypsum coagulant can control the initial setting time of the gypsum-based dry powder mortar to be more than or equal to 1h and the final setting time to be less than or equal to 8h, and meets the requirements of GBT 28627-2012.
The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention.
Example 1
The composite gypsum coagulant comprises the following components: the gypsum powder dihydrate and the dodecyl quaternary ammonium salt (specifically dodecyl trimethyl ammonium chloride) are mixed according to the mass ratio of 9.
And (3) mixing the dihydrate gypsum powder and the dodecyl quaternary ammonium salt according to a proportion to obtain the composite gypsum coagulant which is marked as the No. 1 coagulant.
Example 2
The composite gypsum coagulant comprises the following components: the mass ratio of the anhydrous sodium sulfate to the anhydrous aluminum sulfate to the tetradecyl quaternary ammonium salt is 4.5.
And mixing the anhydrous sodium sulfate, the anhydrous aluminum sulfate and the tetradecyl quaternary ammonium salt according to a ratio to obtain the composite gypsum coagulant, which is marked as a No. 2 coagulant.
Example 3
The composite gypsum coagulant comprises the following components: the mass ratio of the dihydrate gypsum powder to the anhydrous sodium sulfate to the anhydrous aluminum sulfate to the dodecyl quaternary ammonium salt is 5.
And (3) mixing dihydrate gypsum powder, anhydrous sodium sulfate, anhydrous aluminum sulfate and dodecyl quaternary ammonium salt according to a proportion to obtain the composite gypsum coagulant which is marked as a 3# coagulant.
Example 4
The composite gypsum coagulant comprises the following components: the mass ratio of the anhydrous potassium sulfate to the anhydrous aluminum sulfate to the tetradecyl quaternary ammonium salt is 4.5.
And mixing anhydrous potassium sulfate, anhydrous aluminum sulfate and tetradecyl quaternary ammonium salt according to a ratio to obtain the composite gypsum coagulant, which is marked as a No. 4 coagulant.
Application example 1
The 3# coagulant prepared in example 3 was applied to the fluorgypsum render base putty, the specific formulation is shown in table 8:
TABLE 8 formulation of fluorgypsum based render
Name of raw material Specification of Dosage per kg
Fluorgypsum 120-200 meshes 500
Calcium hydroxide ≥90％ 50
Sand 70-140 mesh 440
3# Accelerator - 5
HPMC NDJ-1,2% viscosity; 7 ten thousand cps 3.0
Lubricant agent UNNM-WT04 1.0
Thixotropic agent AMS980 1.0
The raw materials in the table 8 are stirred and mixed uniformly to obtain the fluorgypsum substrate layer putty, and the initial setting time and the final setting time of the fluorgypsum substrate layer putty are tested according to the method in the GBT28627-2012, and the result shows that the initial setting time of the fluorgypsum substrate layer putty is 70-90 min, and the final setting time is 3-3.5 h.
Application example 2
The 3# coagulant prepared in example 3 was applied to citric acid gypsum self-leveling mortar, and the specific formulation is shown in table 9:
TABLE 9 citric acid gypsum self-leveling mortar formula
Name of raw material Specification of Proportioning (kg/ton)
Alpha-hemihydrate gypsum (citric acid gypsum) Yingxuan product, 2h folding-resistant 4.5MPa 500
Cement mortar 42.5R 35
Calcium hydroxide ≥90％ 15
Sand 50-120 mesh 442
3# Accelerator - 3
HPMC NDJ-1,2% viscosity; 400cps 1.0
Water reducing agent UNNM-AD43G 1.5
Defoaming agent UNNM-AD42A 1.0
Leveling agent UNNM-AD47P 1.0
Polyamino acid retarder UNNM-GR25 0.5
The raw materials in the table 9 are stirred and mixed uniformly to obtain the citric acid gypsum self-leveling mortar, and the initial and final setting time of the citric acid gypsum self-leveling mortar is tested according to the method in the GBT28627-2012, and the result shows that the initial setting time of the citric acid gypsum self-leveling mortar is 110min, and the final setting time is 4h.
Application example 3
The concrete formulation of the setting accelerator # 3 prepared in example 3 applied to lightweight thermal insulation gypsum mortar is shown in table 10:
TABLE 10 light weight thermal insulation gypsum mortar formula
Figure BDA0003496887850000101
The raw materials in the table 10 are stirred and mixed uniformly to obtain light heat-insulating gypsum mortar, and the initial setting time and the final setting time of the light heat-insulating gypsum mortar are tested according to the method in GBT28627-2012, and the result shows that the initial setting time and the final setting time of the light heat-insulating gypsum mortar are respectively 95min and 3.5-4 h.
Application example 4
The setting accelerator # 2 prepared in example 2 was used in light gypsum mortar, and the specific formulation is shown in table 11:
TABLE 11 light Gypsum mortar formulation
Figure BDA0003496887850000102
The raw materials in the table 11 are stirred and mixed uniformly to obtain light gypsum mortar, and the initial and final setting time of the light gypsum mortar is tested according to the method in GBT28627-2012, and the result shows that the initial setting time of the light gypsum mortar is 90-120 min, and the final setting time is 4-4.5 h.
Application example 5
The 2# coagulant is applied to the gypsum plastering mortar, and the specific formula is shown in table 12:
TABLE 12 Gypsum plastering mortar formula
Figure BDA0003496887850000111
The raw materials in the table 12 are stirred and mixed uniformly to obtain gypsum plastering mortar, and the initial setting time and the final setting time of the gypsum plastering mortar are tested according to the method in the GBT28627-2012, so that the result shows that the initial setting time and the final setting time of the gypsum plastering mortar are respectively 80-90 min and 2.8-3 h.
Application example 6
The concrete formula of the coagulant 4 applied to the citric acid gypsum putty is shown in the table 13:
TABLE 13 citric acid plaster putty formula
Figure BDA0003496887850000112
The raw materials in the table 13 are stirred and mixed uniformly to obtain the citric acid gypsum putty, and the initial setting time and the final setting time of the citric acid gypsum putty are tested according to the method in the GBT28627-2012, and the result shows that the initial setting time of the citric acid gypsum putty is 80-90 min, and the final setting time is 3h.
Application example 7
The concrete formula of the 1# coagulant applied to the water-resistant citric gypsum putty is shown in the table 14:
TABLE 14 Water-fast citric acid Gypsum putty formulation
Figure BDA0003496887850000121
The raw materials in the table 14 are stirred and mixed uniformly to obtain the water-resistant citric acid gypsum putty, and the initial setting time and the final setting time of the water-resistant citric acid gypsum putty are tested according to the method in the GBT28627-2012, and the result shows that the initial setting time and the final setting time of the water-resistant citric acid gypsum putty are respectively 60-90 min and 150-180 min.
Comparative example 1
Other raw materials and applications were identical to those in table 8 of example 1, except that the set accelerator # 3 was replaced with a mixture of dihydrate gypsum powder, anhydrous sodium sulfate and anhydrous aluminum sulfate in a mass ratio of 5. The initial and final setting time of the obtained fluorgypsum substrate layer putty is tested, and the result shows that the initial setting time is 3 hours and the final setting time is 8 hours. The result shows that the alkyl quaternary ammonium salt is used as the coagulant, so that the initial and final setting time of the gypsum powder can be effectively adjusted.
The main component of the fluorgypsum is anhydrous type II gypsum, and the time of the coagulant in the presence of water is 9 to 72 hours, so that the fluorgypsum is difficult to reach the use standard of building materials; the invention uses alkyl quaternary ammonium salt as a coagulant to be applied to the fluorine gypsum-based dry powder mortar or the citric acid gypsum-based dry powder mortar and is matched with the inorganic gypsum coagulant for use, so that the initial and final setting time of the fluorine gypsum-based dry powder mortar or the citric acid gypsum-based dry powder mortar can be effectively adjusted, and the national standard requirement is met.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (7)

1. The application of the alkyl quaternary ammonium salt as the gypsum-based dry powder mortar coagulant is characterized in that the alkyl quaternary ammonium salt is one or more of C5-C32 alkyl quaternary ammonium salts; the gypsum is fluorgypsum or citric acid gypsum; the alkyl quaternary ammonium salt is matched with an inorganic gypsum coagulant for use; the inorganic gypsum coagulant comprises one or more of dihydrate gypsum powder, anhydrous aluminum sulfate, anhydrous sodium sulfate and anhydrous potassium sulfate; the mass fraction of the alkyl quaternary ammonium salt is 1 to 95 percent, wherein the total weight of the alkyl quaternary ammonium salt and the inorganic gypsum coagulant is 100 percent; the alkyl quaternary ammonium salt is solid alkyl quaternary ammonium salt.
2. The use of claim 1, wherein the quaternary alkyl ammonium salt is one or more of dodecyl trimethyl ammonium chloride, dodecyl trimethyl ammonium bromide, tetradecyl trimethyl ammonium bromide and tetradecyl dimethyl benzyl ammonium chloride.
3. The composite gypsum setting accelerator used in the application of claim 1 or 2, which comprises alkyl quaternary ammonium salt and inorganic gypsum setting accelerator, wherein the mass fraction of the alkyl quaternary ammonium salt in the composite gypsum setting accelerator is 1-95%.
4. The composite gypsum setting accelerator of claim 3, wherein the inorganic gypsum setting accelerator is dihydrate gypsum powder, and the mass ratio of the dihydrate gypsum powder to the alkyl quaternary ammonium salt is (4.5 to 9): 1.
5. The composite gypsum accelerator of claim 3, wherein the inorganic gypsum accelerator is anhydrous sulfur
Sodium and anhydrous aluminium sulphate; the mass ratio of the anhydrous sodium sulfate to the anhydrous aluminum sulfate to the alkyl quaternary ammonium salt is (3) - (4.5) to (1) - (3);
or, the inorganic gypsum coagulant is anhydrous potassium sulfate and anhydrous aluminum sulfate; the mass ratio of the anhydrous potassium sulfate to the anhydrous aluminum sulfate to the alkyl quaternary ammonium salt is (3 to 4.5) to (1 to 3).
6. The composite gypsum accelerator of claim 3, wherein the inorganic gypsum accelerator is powdered gypsum dihydrate, anhydrous sodium sulfate, and anhydrous aluminum sulfate; the mass ratio of the dihydrate gypsum powder to the anhydrous sodium sulfate to the anhydrous aluminum sulfate to the alkyl quaternary ammonium salt is (3) - (5): (1) - (3): 1) - (2.5): 0.1) - (1);
or the inorganic gypsum coagulant is dihydrate gypsum powder, anhydrous potassium sulfate and anhydrous aluminum sulfate; the mass ratio of the dihydrate gypsum powder to the anhydrous potassium sulfate to the anhydrous aluminum sulfate to the alkyl quaternary ammonium salt is (3) - (5): (1) - (3): 1) - (2.5): 0.1) - (1).
7. Use of the composite gypsum setting accelerator according to any one of claims 3 to 6 in a fluorogypsum-based dry powder mortar or a citric acid gypsum-based dry powder mortar.
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