CN113087482B - Waterproof gypsum-based self-leveling mortar and preparation method thereof - Google Patents
Waterproof gypsum-based self-leveling mortar and preparation method thereof Download PDFInfo
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- CN113087482B CN113087482B CN202110382252.5A CN202110382252A CN113087482B CN 113087482 B CN113087482 B CN 113087482B CN 202110382252 A CN202110382252 A CN 202110382252A CN 113087482 B CN113087482 B CN 113087482B
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- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 65
- 239000010440 gypsum Substances 0.000 title claims abstract description 65
- 239000004570 mortar (masonry) Substances 0.000 title claims abstract description 61
- 238000002360 preparation method Methods 0.000 title abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 60
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 28
- 239000004593 Epoxy Substances 0.000 claims abstract description 24
- 239000000839 emulsion Substances 0.000 claims abstract description 24
- 150000001412 amines Chemical class 0.000 claims abstract description 23
- 239000004576 sand Substances 0.000 claims abstract description 22
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 17
- 239000004568 cement Substances 0.000 claims abstract description 11
- 238000010276 construction Methods 0.000 claims abstract description 9
- 239000001913 cellulose Substances 0.000 claims abstract description 7
- 229920002678 cellulose Polymers 0.000 claims abstract description 7
- 238000006243 chemical reaction Methods 0.000 claims abstract description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 24
- 238000003756 stirring Methods 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 9
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 7
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 4
- 229910052739 hydrogen Inorganic materials 0.000 claims description 4
- 239000001257 hydrogen Substances 0.000 claims description 4
- 239000002480 mineral oil Substances 0.000 claims description 4
- 235000010446 mineral oil Nutrition 0.000 claims description 4
- 102000004169 proteins and genes Human genes 0.000 claims description 4
- 108090000623 proteins and genes Proteins 0.000 claims description 4
- WPJGWJITSIEFRP-UHFFFAOYSA-N 1,3,5-triazine-2,4,6-triamine;hydrate Chemical group O.NC1=NC(N)=NC(N)=N1 WPJGWJITSIEFRP-UHFFFAOYSA-N 0.000 claims description 3
- 239000004215 Carbon black (E152) Substances 0.000 claims description 3
- 229910019142 PO4 Inorganic materials 0.000 claims description 3
- 239000004952 Polyamide Substances 0.000 claims description 3
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 3
- 239000006229 carbon black Substances 0.000 claims description 3
- 239000003995 emulsifying agent Substances 0.000 claims description 3
- 229930195733 hydrocarbon Natural products 0.000 claims description 3
- 150000002430 hydrocarbons Chemical class 0.000 claims description 3
- 230000002209 hydrophobic effect Effects 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 150000007524 organic acids Chemical class 0.000 claims description 3
- 239000010452 phosphate Substances 0.000 claims description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 3
- 229920002647 polyamide Polymers 0.000 claims description 3
- 229920000570 polyether Polymers 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 claims description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 2
- 229910052710 silicon Inorganic materials 0.000 claims description 2
- 239000010703 silicon Substances 0.000 claims description 2
- 239000013530 defoamer Substances 0.000 claims 4
- JOLVYUIAMRUBRK-UHFFFAOYSA-N 11',12',14',15'-Tetradehydro(Z,Z-)-3-(8-Pentadecenyl)phenol Natural products OC1=CC=CC(CCCCCCCC=CCC=CCC=C)=C1 JOLVYUIAMRUBRK-UHFFFAOYSA-N 0.000 claims 1
- YLKVIMNNMLKUGJ-UHFFFAOYSA-N 3-Delta8-pentadecenylphenol Natural products CCCCCCC=CCCCCCCCC1=CC=CC(O)=C1 YLKVIMNNMLKUGJ-UHFFFAOYSA-N 0.000 claims 1
- JOLVYUIAMRUBRK-UTOQUPLUSA-N Cardanol Chemical compound OC1=CC=CC(CCCCCCC\C=C/C\C=C/CC=C)=C1 JOLVYUIAMRUBRK-UTOQUPLUSA-N 0.000 claims 1
- FAYVLNWNMNHXGA-UHFFFAOYSA-N Cardanoldiene Natural products CCCC=CCC=CCCCCCCCC1=CC=CC(O)=C1 FAYVLNWNMNHXGA-UHFFFAOYSA-N 0.000 claims 1
- PTFIPECGHSYQNR-UHFFFAOYSA-N cardanol Natural products CCCCCCCCCCCCCCCC1=CC=CC(O)=C1 PTFIPECGHSYQNR-UHFFFAOYSA-N 0.000 claims 1
- 238000006703 hydration reaction Methods 0.000 abstract description 7
- 238000004132 cross linking Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 4
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 3
- 238000005336 cracking Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 239000006260 foam Substances 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910001653 ettringite Inorganic materials 0.000 description 1
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 description 1
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 description 1
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 description 1
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 description 1
- 239000000976 ink Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- 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
- C04B28/142—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 containing synthetic or waste calcium sulfate cements
- C04B28/144—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 containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being a flue gas desulfurization product
-
- 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
- C04B2103/50—Defoamers, air detrainers
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/52—Sound-insulating 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/60—Flooring materials
- C04B2111/62—Self-levelling compositions
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a waterproof gypsum-based self-leveling mortar and a preparation method thereof, wherein the waterproof gypsum-based self-leveling mortar comprises A, B components, and the component A comprises the following components in percentage by weight: 20% -45% of water-soluble amine; 15% -60% of water; 0.1% -0.4% of defoaming agent; 20% -45% of epoxy emulsion; the component B comprises the following components in percentage by weight: 40% -60% of semi-hydrated desulfurized gypsum; 1% -10% of cement; 30% -65% of round sand; cellulose 0.1% -0.2%; 0.2% -0.3% of water reducer; 0.1% -0.2% of retarder; 0.1% -0.2% of defoaming agent; the component A and the component B are mixed according to the weight ratio A: B=1:3 during construction. The component B adopts semi-hydrated desulfurized gypsum which can generate hydration reaction, and the component A generates cross-linking reaction to form a three-dimensional network structure during preparation. When the component A and the component B are mixed, the moisture in the component A can participate in hydration reaction of the semi-hydrated desulfurized gypsum, so that the volatilization of the moisture is reduced, the whole system is more compact and stable, and meanwhile, the reticular structure in the component A supports and wraps the component B in the whole system, so that the crack resistance and the water resistance of the water-resistant gypsum-based self-leveling mortar are greatly improved.
Description
Technical Field
The invention belongs to the field of building materials, and particularly relates to a waterproof gypsum-based self-leveling mortar and a preparation method thereof.
Background
At present, the self-leveling mortar on the market is usually cement-based self-leveling mortar and gypsum-based self-leveling mortar, but the existing cement-based self-leveling mortar has the problems of easy shrinkage and cracking, only thin layer batch scraping, poor bonding strength and the like, and the gypsum-based self-leveling mortar overcomes the defect that cement-based self-leveling Ping Shajiang is easy to shrink and crack, but has large use limitation due to the defect of poor water resistance.
Disclosure of Invention
The invention aims to provide a waterproof gypsum-based self-leveling mortar to solve at least one of the problems.
In order to solve the technical problems, the invention adopts the following technical scheme that the waterproof gypsum-based self-leveling mortar comprises A, B components, wherein the component A comprises the following components in percentage by weight:
the component B comprises the following components in percentage by weight:
the component A and the component B are mixed according to the weight ratio A: B=1:3 during construction.
In the waterproof gypsum-based self-leveling mortar, the component A comprises the following components in percentage by weight:
the component B comprises the following components in percentage by weight:
in the above water-resistant gypsum-based self-leveling mortar, the water-soluble amine includes one or more of natural cardanol-modified water-soluble amine, polyamide and aliphatic amine.
In the waterproof gypsum-based self-leveling mortar, the epoxy emulsion comprises one or more of E51 type epoxy emulsion, E44 type epoxy emulsion and acrylic acid modified epoxy emulsion.
In the waterproof gypsum-based self-leveling mortar, the defoaming agent in the component A comprises one or more of mineral oil defoaming agents, organic silicon defoaming agents and acrylic defoaming agents.
In the waterproof gypsum-based self-leveling mortar, the defoaming agent in the component B is a mixture composed of special polyether, an emulsifying agent, hydrophobic white carbon black and liquid hydrocarbon.
In the waterproof gypsum-based self-leveling mortar, the water reducer in the component B is a melamine water reducer or a polycarboxylic acid water reducer.
In the waterproof gypsum-based self-leveling mortar, the retarder in the component B comprises one or more of organic acid and a soluble salt retarder thereof, an alkaline phosphate retarder and a protein retarder.
In the waterproof gypsum-based self-leveling mortar, the round sand is water-washed round sand, and the water-washed round sand comprises the following components in percentage by weight: washing round sand with 80-120 meshes by 20%; 29.37 percent of 120-180 mesh water washed round sand.
Compared with the prior art, the invention has the beneficial effects that:
the component B in the invention adopts semi-hydrated desulfurized gypsum, and the semi-hydrated desulfurized gypsum can undergo hydration reaction, namely:
The invention also provides a preparation method of the waterproof gypsum-based self-leveling mortar, which comprises the following steps:
(1) Adding water-soluble amine, water and a defoaming agent into a container, and stirring at a speed of 15r/min for 15 minutes to obtain a mixture;
(2) According to the kind of water-soluble amine, adding the epoxy emulsion into a container according to the reaction equivalent ratio of 1:1 of active hydrogen equivalent and mixing with the mixture in the step (1) to obtain a component A;
(3) Sequentially adding semi-hydrated desulfurized gypsum, cement, round sand, cellulose, a water reducer, a retarder and a defoaming agent into a stirring kettle, and stirring for 10 minutes to obtain a component B;
(4) And (3) mixing and uniformly stirring the component A in the step (2) and the component B in the step (4) according to the weight ratio A: B=1:3 to obtain the water-resistant gypsum-based self-leveling mortar.
Detailed Description
Embodiment one:
the water-resistant gypsum-based self-leveling mortar comprises A, B components, wherein the component A comprises the following components in percentage by weight:
the component B comprises the following components in percentage by weight:
the component A and the component B are mixed according to the weight ratio A: B=1:3 during construction.
The component B in the invention adopts semi-hydrated desulfurized gypsum, and the semi-hydrated desulfurized gypsum can undergo hydration reaction, namely:
The water-soluble amine in this embodiment is a low viscosity water-soluble amine to ensure that the final mortar has good fluidity, including one or more of natural cardanol-modified water-soluble amine, polyamide and fatty amine, and preferably natural cardanol-modified water-soluble amine is used, which has good water solubility, adhesive strength and good permeability and film forming property because of its low viscosity.
In this embodiment, the epoxy emulsion includes one or more of an E51 type epoxy emulsion, an E44 type epoxy emulsion, and an acrylic modified epoxy emulsion, and it is preferable that the epoxy emulsion includes the following components in weight percentage: 20% of E51 type epoxy emulsion and 20% of acrylic acid modified epoxy emulsion, and the acrylic acid modified epoxy emulsion has better ageing resistance, so that the waterproof gypsum-based self-leveling mortar has better ageing resistance.
In this embodiment, the defoaming agent in the component a includes one or more of mineral oil type defoaming agent, silicone type defoaming agent and acrylic type defoaming agent, and by using the defoaming agent to rapidly break bubbles and permanently defoam bubbles in the stirring preparation process, air holes are prevented from being formed in the mortar after the material is cured, thereby affecting the strength and the appearance of the mortar. Preferably, the defoaming agent is an active mineral oil defoaming agent, and is a special silicon-free defoaming agent, so that the defoaming agent can be self-emulsified in water, can quickly eliminate foam in water-based printing ink, coating and adhesive systems, can prevent the surface of mortar from generating air hole-shaped surface defects after solidification, is suitable for a formula of a porous substrate, has the advantage of good continuous defoaming property, and can continuously foam bubbles generated in the stirring process.
In the implementation, cement is added into the component B, so that the cement and gypsum react to form ettringite, and the final hardness of the mortar is improved. The defoaming agent in the component B is a mixture composed of special polyether, an emulsifying agent, hydrophobic white carbon black and liquid hydrocarbon, so that the foam breaking effect of the component B in the mixing process is better, and the final performance of mortar is prevented from being influenced by air bubbles. The water reducer in the component B is a melamine water reducer or a polycarboxylic acid water reducer, and the water reducer is added to reduce the water consumption in hydration reaction, and the polycarboxylic acid water reducer is preferably adopted. The retarder in the component B comprises one or more of organic acid and soluble salt retarder, alkaline phosphate retarder and protein retarder, and the setting retarder is used for reducing the curing speed of mortar, preventing the mortar from being cured too fast and not reaching the construction, and effectively adjusting the construction time of the mortar, preferably the protein retarder. The cellulose in this example is preferably low viscosity hydroxypropyl methylcellulose.
The round sand in the embodiment is water-washed round sand, and the water-washed round sand comprises the following components in percentage by weight: the water-washed round sand with 80-120 meshes and the water-washed round sand with 120-180 meshes are 20 percent and 29.37 percent, and the void ratio of the system can be prevented from being too high by arranging the water-washed round sand with two different particle sizes, so that the mortar is more compact, and the fluidity is improved.
Embodiment two:
the water-resistant gypsum-based self-leveling mortar comprises A, B components, wherein the component A comprises the following components in percentage by weight:
the component B comprises the following components in percentage by weight:
the component A and the component B are mixed according to the weight ratio A: B=1:3 during construction.
Embodiment III:
the water-resistant gypsum-based self-leveling mortar comprises A, B components, wherein the component A comprises the following components in percentage by weight:
the component B comprises the following components in percentage by weight:
the component A and the component B are mixed according to the weight ratio A: B=1:3 during construction.
The results of the tests performed on the water-resistant gypsum-based self-leveling mortars prepared in examples one to three of the present invention are shown in the following table:
the test results show that:
the water-resistant gypsum-based self-leveling mortar meets the requirements of JC/T1023-2007 gypsum-based self-leveling standard and GBT22374-2018 terrace coating paint, has tensile setting strength reaching 2.0MPa and compressive strength reaching more than 45MPa, and meets the water resistance index of 168 hours, so that the water-resistant gypsum-based self-leveling mortar has the effects of water resistance, environmental protection and crack resistance.
Embodiment four:
a preparation method of water-resistant gypsum-based self-leveling mortar comprises the following steps:
(1) Adding water-soluble amine, water and a defoaming agent into a container, and stirring at a speed of 15r/min for 15 minutes to obtain a mixture;
(2) According to the kind of the water-soluble amine, adding the epoxy emulsion into a container according to the reaction equivalent ratio of 1:1 of the active hydrogen equivalent ratio and mixing the epoxy emulsion with the mixture in the step (1) to obtain a component A, and enabling the water-soluble amine and the epoxy emulsion to fully react by adopting the ratio of 1:1 of the active hydrogen equivalent ratio;
(3) Sequentially adding semi-hydrated desulfurized gypsum, cement, round sand, cellulose, a water reducer, a retarder and a defoaming agent into a stirring kettle, and stirring for 10 minutes to obtain a component B;
(4) And (3) mixing and uniformly stirring the component A in the step (2) and the component B in the step (4) according to the weight ratio A: B=1:3 to obtain the water-resistant gypsum-based self-leveling mortar.
Of course, it is understood that a proper amount of water can be added into the mixed water-resistant gypsum-based self-leveling mortar to improve the fluidity of the water-resistant gypsum-based self-leveling mortar for easy construction.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above examples, and all technical solutions belonging to the concept of the present invention belong to the protection scope of the present invention. It should be noted that modifications and adaptations to the present invention may occur to one skilled in the art without departing from the principles of the present invention and are intended to be within the scope of the present invention.
Claims (8)
1. The waterproof gypsum-based self-leveling mortar comprises A, B components, and is characterized in that the component A comprises the following components in percentage by weight:
20% -45% of water-soluble amine;
15% -60% of water;
0.1% -0.4% of defoaming agent;
20% -45% of epoxy emulsion;
the component B comprises the following components in percentage by weight:
40% -60% of semi-hydrated desulfurized gypsum;
1% -10% of cement;
30% -65% of round sand;
cellulose 0.1% -0.2%;
0.2% -0.3% of water reducer;
0.1% -0.2% of retarder;
0.1% -0.2% of defoaming agent;
the component A and the component B are mixed according to the weight ratio A of B=1:3 during construction;
the water-soluble amine is low-viscosity water-soluble amine and comprises one or more of natural cardanol modified water-soluble amine, polyamide and fatty amine; the round sand is water-washed round sand, and the water-washed round sand comprises the following components in percentage by weight: the 80-120 mesh water-washed round sand is 20 percent, and the 120-180 mesh water-washed round sand is 29.37 percent.
2. The water-resistant gypsum-based self-leveling mortar of claim 1, wherein the a component comprises, by weight:
25% of water-soluble amine;
34.68% of water;
0.32% of defoaming agent;
40% of epoxy emulsion;
the component B comprises the following components in percentage by weight:
semi-hydrated desulfurized gypsum 46%;
4% of cement;
49.37% of round sand;
cellulose 0.12%;
0.25% of water reducer;
retarder 0.1%;
0.16% of defoaming agent.
3. A water-resistant gypsum-based self-leveling mortar in accordance with claim 1 or 2, wherein: the epoxy emulsion comprises one or more of E51 type epoxy emulsion, E44 type epoxy emulsion and acrylic modified epoxy emulsion.
4. A water-resistant gypsum-based self-leveling mortar in accordance with claim 1 or 2, wherein: the defoamer in the component A comprises one or more of mineral oil defoamer, organic silicon defoamer and acrylic defoamer.
5. A water-resistant gypsum-based self-leveling mortar in accordance with claim 1 or 2, wherein: the defoaming agent in the component B is a mixture composed of special polyether, an emulsifying agent, hydrophobic white carbon black and liquid hydrocarbon.
6. A water-resistant gypsum-based self-leveling mortar in accordance with claim 1 or 2, wherein: the water reducer in the component B is a melamine water reducer or a polycarboxylic acid water reducer.
7. A water-resistant gypsum-based self-leveling mortar in accordance with claim 1 or 2, wherein: the retarder in the component B comprises one or more of organic acid and a soluble salt retarder, an alkaline phosphate retarder and a protein retarder thereof.
8. A method for preparing the water-resistant gypsum-based self-leveling mortar according to any one of claims 1 to 7, comprising the steps of:
(1) Adding water-soluble amine, water and a defoaming agent into a container, and stirring at a speed of 15r/min for 15 minutes to obtain a mixture;
(2) According to the kind of water-soluble amine, adding the epoxy emulsion into a container according to the reaction equivalent ratio of 1:1 of active hydrogen equivalent and mixing with the mixture in the step (1) to obtain a component A;
(3) Sequentially adding semi-hydrated desulfurized gypsum, cement, round sand, cellulose, a water reducer, a retarder and a defoaming agent into a stirring kettle, and stirring for 10 minutes to obtain a component B;
(4) And (3) mixing and uniformly stirring the component A in the step (2) and the component B in the step (4) according to the weight ratio A: B=1:3 to obtain the water-resistant gypsum-based self-leveling mortar.
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| CN102173707A (en) * | 2011-01-31 | 2011-09-07 | 上海市建筑科学研究院(集团)有限公司 | Desulfurization alpha semi-hydrated gypsum self-leveling mortar |
| CN104261765B (en) * | 2014-09-29 | 2015-06-03 | 小浪底水利水电工程有限公司 | Epoxy resin polymer mortar and production process thereof |
| CN106431146A (en) * | 2016-10-09 | 2017-02-22 | 南京工业大学 | Composite gypsum-based self-leveling mortar and preparation method thereof |
| CN108275913B (en) * | 2017-12-13 | 2020-11-20 | 苍南县交通建设工程有限公司 | Epoxy mortar for bridge and preparation method thereof |
| CN108516785A (en) * | 2018-07-03 | 2018-09-11 | 义乌市恒起进出口有限公司 | A kind of high-early-strength does not crack surfacing self-leveling floor mortar and preparation method thereof |
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Denomination of invention: A water resistant gypsum based self leveling mortar and its preparation method Granted publication date: 20230425 Pledgee: Zhejiang Linhai Rural Commercial Bank Co.,Ltd. Chengdong sub branch Pledgor: ZHEJIANG ZHIQIANG PAINT Co.,Ltd. Registration number: Y2024980024405 |
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