CN111499328A - Construction method for plastering gypsum and plastering indoor finish wall - Google Patents
Construction method for plastering gypsum and plastering indoor finish wall Download PDFInfo
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- CN111499328A CN111499328A CN202010341899.9A CN202010341899A CN111499328A CN 111499328 A CN111499328 A CN 111499328A CN 202010341899 A CN202010341899 A CN 202010341899A CN 111499328 A CN111499328 A CN 111499328A
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- gypsum
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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
- 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
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F21/00—Implements for finishing work on buildings
- E04F21/02—Implements for finishing work on buildings for applying plasticised masses to surfaces, e.g. plastering walls
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F21/00—Implements for finishing work on buildings
- E04F21/02—Implements for finishing work on buildings for applying plasticised masses to surfaces, e.g. plastering walls
- E04F21/04—Patterns or templates; Jointing rulers
-
- 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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00482—Coating or impregnation 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
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Chemical & Material Sciences (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention provides a plastering gypsum for indoor finish wall and a construction method thereof, wherein the plastering gypsum comprises the following components in parts by weight: 40-60 parts of desulfurized gypsum, 30-40 parts of lightweight aggregate, 3-6 parts of a calcium increasing agent, 2.5-4.5 parts of dispersible latex powder, 0.1-0.4 part of a regulator and 0.05-0.3 part of a water-retaining agent, wherein the calcium increasing agent is calcium oxide and calcium hydroxide, the regulator is ultrafine crushed yeast cell walls, and the water-retaining agent is cellulose ether, the construction method of the plastering gypsum comprises substrate treatment, net hanging, rebar punching and batch scraping, so that the plastering gypsum mortar is firmly combined with the substrate, and the ultrafine crushed yeast cell walls have a good retarding effect as the regulator, are small in strength loss and good in water holding capacity, play a certain role in water retention in the gypsum hydration process, can reduce the using amount of the water-retaining agent and further reduce the strength loss.
Description
Technical Field
The invention relates to the technical field of wall plastering gypsum, in particular to a construction method for plastering gypsum on an indoor finish wall.
Background
The gypsum material has the characteristics of small deformation, good fire resistance and no harm to human bodies, is a novel building material commonly used in modern buildings, has excellent performance, and has the advantages of safety, comfort, environmental protection and the like. The gypsum building material has the outstanding defects of quick setting, the initial setting time is generally only a few minutes to a dozen minutes, the plasticity is quickly lost, great inconvenience is brought to construction, the requirement of the construction operation time cannot be met, and the general solution is to add a gypsum retarder into the gypsum material to prolong the setting time. The commonly used gypsum retarder is mainly organic acids, including citric acid, sodium citrate, sodium polyphosphate and proteins; although the retarder can also play a role in adjusting the setting time of the gypsum material, the retarder has the disadvantages of complex production process, high energy consumption, high cost, great strength loss of the gypsum material and inconvenience for construction.
Disclosure of Invention
Aiming at the problems, the invention provides plastering gypsum plaster for an indoor finish wall surface and a construction method.
The purpose of the invention is realized by adopting the following technical scheme:
a construction method for plastering gypsum on indoor finish wall surfaces comprises the following steps:
(1) substrate treatment
Cleaning the surface of the wall surface substrate, repairing and filling the caulking seams and the wire grooves, and flattening the unreserved concave-convex or hole parts;
(2) plastering for hanging net
Preparing plastering gypsum mortar, wherein the plastering gypsum consists of 40-60 parts of desulfurized gypsum, 30-40 parts of lightweight aggregate, 3-6 parts of calcium increasing agent, 2.5-4.5 parts of dispersible latex powder, 0.1-0.4 part of regulator and 0.05-0.3 part of water-retaining agent, the calcium increasing agent is calcium oxide and calcium hydroxide, the regulator is ultramicro crushed yeast cell walls, the water-retaining agent is cellulose ether, water is added to adjust to proper consistency, fiber mesh cloth is adopted to pave at the joint of different materials of the wall body, the fiber mesh cloth is flattened, the tower joint lengths on the two sides are not less than 100cm, the plastering gypsum mortar is firmly stuck in a dot shape, and the distance between the sticking points is 300 plus one hour and 500 mm;
(3) punching rib
Punching control ash cakes at two ends of a wall body, punching ribs at two ends of the wall body according to the conditions of the ash cakes, and punching ribs at other parts of the wall surface by pulling wires according to the punched ribs at two ends, wherein the distance between the two ribs is 1.2-1.5m, and the width of the punched ribs is 30-50 mm;
(4) plastering gypsum batch scraper
The thickness of the batch scraping is 3-9mm, and the batch scraping is pressed by force during operation, so that the plastering gypsum mortar is firmly combined with the substrate, and the skirting part of the wall surface is plastered.
Preferably, the yeast cell wall is a cell wall extracted from waste saccharomyces cerevisiae.
Preferably, the preparation method of the yeast cell wall comprises the steps of diluting the yeast paste with water, filtering to remove impurities, standing and settling yeast filtrate or performing centrifugal separation, washing with 1-20% sodium chloride solution and water respectively for deodorization, adding neutral protease for enzymolysis, performing ultrasonic crushing and enzyme deactivation treatment, performing centrifugal washing until washing liquid is colorless, drying, and performing superfine grinding to obtain the yeast cell wall.
Preferably, the yeast cell wall also comprises chloroacetic acid modified yeast cell wall.
Preferably, the modification method of the chloroacetic acid modified yeast cell wall comprises the steps of adding 0.5 mol/L chloroacetic acid solution into the yeast cell wall obtained by superfine grinding, adding the chloroacetic acid solution with the solid-to-liquid ratio of 10m L/g, heating to 35-60 ℃, reacting for 0.5-3h, filtering out a product, washing, drying, performing irradiation treatment, and performing irradiation metering of 1-60kGy to obtain the chloroacetic acid modified yeast cell wall.
Preferably, the lightweight aggregate is vitrified micro bubbles, fine sand, zeolite or a combination thereof, and the particle size is 90-120 meshes.
Preferably, the plaster also comprises an anionic emulsifier, and the addition amount of the anionic emulsifier is 0.01-0.04% of the total amount of the plastering gypsum.
Preferably, the anionic emulsifier is a sulfonate-type emulsifier.
The invention has the beneficial effects that:
the yeast cell wall contains rich glucan, mannan, protein and chitin, and the yeast cell wall subjected to superfine grinding has rich oxygen-containing and nitrogen-containing functional group structures, and is added as a regulator, so that the growth of dihydrate gypsum crystal nuclei can be inhibited, the early hydration of gypsum is delayed, the slow setting time is moderate, the strength loss is small, and meanwhile, the yeast cell wall also has good water holding capacity, plays a certain role in water retention in the gypsum hydration process, reduces the dosage of a water retention agent, and further reduces the strength loss.
Detailed Description
The invention is further described with reference to the following examples.
The embodiment of the application relates to indoor finish wall plastering gypsum, which consists of 40-60 parts of desulfurized gypsum, 30-40 parts of lightweight aggregate, 3-6 parts of calcium increasing agent, 2.5-4.5 parts of dispersible latex powder, 0.1-0.4 part of regulator and 0.05-0.3 part of water-retaining agent by mass part, wherein the calcium increasing agent is calcium oxide and calcium hydroxide, the regulator is ultramicro crushed yeast cell wall, and the water-retaining agent is cellulose ether.
The retarder is a main additional regulator of the plastering gypsum, and the addition of the retarder in the plastering gypsum can delay the gypsum coagulation and has better construction property; but with the increase of the mixing amount of the retarder, the setting time is prolonged, and the strength is also obviously reduced; the retarder is doped, so that the hydration process of the semi-hydrated gypsum is inhibited, the retention and condensation time of the gypsum on a wall is prolonged, most of the wall has water absorption, and in order to prevent part of water in the gypsum from transferring to the wall to cause separation and shell formation at the joint of slurry and the wall and ensure the hydration reaction of gypsum slurry at an interface, thereby ensuring the bonding strength, a water-retaining agent is required to be added for carrying out water retention treatment on the calcined gypsum slurry;
the yeast cell wall consists of β -glucan of about 29 percent, mannan of 31 percent, protein of 13 percent, lipid of 9 percent and chitin of 1 percent to 2 percent, wherein β -glucan and mannan are polysaccharides and have rich hydroxyl structures, protein is a good retarder, chitin is a polymer formed by acetylglucosamine and comprises rich amino, acyl and hydroxyl groups, the crushed and thinned yeast cell wall surface has a large amount of oxygen-containing and nitrogen-containing functional groups and is easy to form complexation with calcium ions in a gypsum liquid phase on the surfaces of hemihydrate gypsum and crystal nuclei, so that crystals are loosely lapped with each other, the growth of dihydrate gypsum crystal nuclei is inhibited, the early hydration of gypsum is delayed, the retarding time is moderate, the strength loss is less than that of a citric acid retarder, on the other hand, the yeast cell wall also has good water retention capacity due to multiple hydrophilic groups, a certain water retention effect is achieved in the gypsum hydration process, but the water retention effect is limited, and a trace amount of water retention agent is still required to be added;
the ultramicro crushing refers to a process of crushing material particles of 0.5-5 mm to micron or even nanometer by using a machine or a hydrodynamic approach;
preferably, the yeast cell wall is a cell wall extracted from waste saccharomyces cerevisiae.
The waste saccharomyces cerevisiae is a byproduct in the saccharomyces cerevisiae industry, the application of the waste saccharomyces cerevisiae is mostly concentrated in the feed industry and the production of yeast preparations, a large amount of waste saccharomyces cerevisiae is discharged along with waste water, so that the waste of resources and the serious pollution to the environment are caused, and a new way is provided for the resource utilization of the waste saccharomyces cerevisiae;
preferably, the preparation method of the yeast cell wall comprises the steps of diluting the yeast paste with water, filtering to remove impurities, standing and settling yeast filtrate or performing centrifugal separation, washing with 1-20% sodium chloride solution and water respectively for deodorization, adding neutral protease for enzymolysis, performing ultrasonic crushing and enzyme deactivation treatment, performing centrifugal washing until washing liquid is colorless, drying, and performing superfine grinding to obtain the yeast cell wall.
The waste saccharomyces cerevisiae contains more impurities and peculiar smell, the impurities and the peculiar smell need to be removed, the muddy yeast mixture is diluted by water to be accelerated to be filtered, the sodium chloride solution can be washed to remove the peculiar smell, and the combination of enzymolysis and ultrasonic crushing is used for breaking the cell wall;
preferably, the yeast cell wall also comprises chloroacetic acid modified yeast cell wall.
The actual hydration water requirement of the semi-hydrated gypsum is higher, so that excessive water generated by hydration can be evaporated after the gypsum is hardened, a plurality of air holes are left, the influence on the strength is larger, a water reducing agent is required to be added to reduce the water consumption for the hydration of the gypsum and reduce the water-paste ratio of the hydration of the gypsum; the yeast cell wall is replaced by partial carboxyethyl, so that the zeta potential value is increased, the charge distribution on the surface of gypsum particles is changed in a gypsum system, the resistance among the gypsum particles is increased, the dispersibility among the particles is enhanced, the water reducing effect is exerted, the hydration water demand of the gypsum can be greatly reduced, and the absolute dry strength of the gypsum is remarkably improved;
preferably, the modification method of the chloroacetic acid modified yeast cell wall comprises the steps of adding 0.5 mol/L chloroacetic acid solution into the yeast cell wall obtained by superfine grinding, adding the chloroacetic acid solution with the solid-to-liquid ratio of 10m L/g, heating to 35-60 ℃, reacting for 0.5-3h, filtering out a product, washing, drying, performing irradiation treatment, and performing irradiation metering of 1-60kGy to obtain the chloroacetic acid modified yeast cell wall.
The interaction between the rays and the processed object is utilized to ionize and excite the generated activated atoms and activated molecules so as to generate a series of physical and chemical changes with the processed object substances, including depolymerization, crosslinking or modification of cell walls, so that the modification effect is more stable, the water reducing effect is improved, and the addition amount is reduced;
preferably, the lightweight aggregate is vitrified micro bubbles, fine sand, zeolite or a combination thereof, and the particle size is 90-120 meshes.
Preferably, the plaster also comprises an anionic emulsifier, and the addition amount of the anionic emulsifier is 0.01-0.04% of the total amount of the plastering gypsum.
Preferably, the anionic emulsifier is a sulfonate-type emulsifier.
The ultrafine crushed yeast cell walls are easy to agglomerate in a gypsum system, so that the performance of the delayed coagulation and water reducing performance of the ultrafine crushed yeast cell walls is influenced, the dispersion of the yeast cell walls in the gypsum system can be improved by the anionic emulsifier, the addition amount of the yeast cell walls can be reduced when the same effect is obtained, the water wrapped in gypsum particles is released, the water requirement for hydration is reduced, and a certain water reducing effect is achieved; the use of sulfonate emulsifiers can further enhance the workability and stability of the system, and have a positive effect on the improvement of gypsum strength.
Example 1
46 parts of desulfurized gypsum, 38 parts of lightweight aggregate, 6 parts of calcium increasing agent, 4 parts of dispersible latex powder, 0.3 part of regulator and 0.15 part of water-retaining agent, wherein the addition amount of the anionic emulsifier is 0.02 percent of the total amount of the plastered gypsum, the calcium increasing agent is calcium oxide and calcium hydroxide, the regulator is yeast cell walls which are superfine crushed, the water-retaining agent is cellulose ether, the anionic emulsifier is a sulfonate emulsifier, the lightweight aggregate is vitrified micro-beads, fine sand, zeolite or a combination thereof, and the granularity is 90-120 meshes;
the preparation method of the superfine crushed yeast cell wall comprises the following steps: diluting the waste saccharomyces cerevisiae mud with water, filtering to remove impurities, standing and settling yeast filtrate or performing centrifugal separation, washing with 1-20% sodium chloride solution and water respectively to remove odor, adding neutral protease for enzymolysis, performing ultrasonic crushing and enzyme deactivation treatment, performing centrifugal washing until the washing liquid is colorless, drying, and performing superfine grinding to obtain the superfine ground yeast cell wall.
The retardation effect of the ultrafinely shattered yeast cell walls was compared with conventional retarders (citric acid, sodium polyphosphate) as follows:
example 2
The indoor fine finishing wall plastering gypsum comprises 58 parts of desulfurized gypsum, 40 parts of lightweight aggregate, 5 parts of a calcium increasing agent, 4.5 parts of dispersible latex powder, 0.4 part of a regulator and 0.25 part of a water-retaining agent in parts by mass, wherein the addition amount of the anionic emulsifier is 0.04 percent of the total amount of the plastering gypsum, the calcium increasing agent is calcium oxide and calcium hydroxide, the regulator is yeast cell walls which are superfine crushed, the water-retaining agent is cellulose ether, the anionic emulsifier is a sulfonate emulsifier, the lightweight aggregate is vitrified micro-beads, fine sand, zeolite or a combination thereof, and the granularity is 90-120 meshes;
the preparation method of the yeast cell wall comprises the following steps:
(1) diluting the waste saccharomyces cerevisiae mud with water, filtering to remove impurities, standing and settling yeast filtrate or performing centrifugal separation, washing with 1-20% sodium chloride solution and water respectively for deodorization, adding neutral protease for enzymolysis, performing ultrasonic crushing and enzyme deactivation treatment, performing centrifugal washing until the washing liquid is colorless, drying, and performing superfine grinding to obtain superfine ground yeast cell walls;
(2) adding 0.5 mol/L chloroacetic acid solution into the yeast cell wall obtained by superfine grinding, adding 10m L/g of the chloroacetic acid solution, heating to 35-60 ℃, reacting for 0.5-3h, filtering and washing products, drying, performing irradiation treatment, and measuring the irradiation dose to 1-60kGy to obtain the chloroacetic acid modified yeast cell wall.
The yeast cell wall substituted by partial carboxyethyl has a certain water reducing effect, can greatly reduce the hydration water demand of the gypsum and obviously improve the absolute dry strength of the gypsum, and compared with the plastering gypsum in the embodiment 1, the hydration water demand is reduced by 8-11 percent and the absolute dry strength is improved by 5-9 percent.
Example 3
A construction method of plastering gypsum on a finish interior wall according to embodiment 1 or 2, comprising the steps of:
(1) substrate treatment
Cleaning the surface of the wall surface substrate, repairing and filling the caulking seams and the wire grooves, and flattening the unreserved concave-convex or hole parts;
(2) plastering for hanging net
Preparing plastering gypsum mortar, mixing the plastering gypsum mortar according to a ratio, adding water to adjust the thickness to a proper value, paving and binding the joint of different materials of the wall by adopting fiber mesh cloth, flattening the fiber mesh cloth, ensuring that the tower joint length of two sides is not less than 100cm, firmly sticking the plastering gypsum mortar in a dot shape, and ensuring that the distance between sticking points is 300-500 mm;
(3) punching rib
Punching control ash cakes at two ends of a wall body, punching ribs at two ends of the wall body according to the conditions of the ash cakes, and punching ribs at other parts of the wall surface by pulling wires according to the punched ribs at two ends, wherein the distance between the two ribs is 1.2-1.5m, and the width of the punched ribs is 30-50 mm;
(4) plastering gypsum batch scraper
The thickness of the batch scraping is 3-9mm, and the batch scraping is pressed by force during operation, so that the plastering gypsum mortar is firmly combined with the substrate, and the skirting part of the wall surface is plastered.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (9)
1. The indoor fine decoration wall plastering gypsum is characterized by comprising, by mass, 40-60 parts of desulfurized gypsum, 30-40 parts of lightweight aggregate, 3-6 parts of a calcium increasing agent, 2.5-4.5 parts of dispersible latex powder, 0.1-0.4 part of a regulator and 0.05-0.3 part of a water-retaining agent, wherein the calcium increasing agent is calcium oxide and calcium hydroxide, the regulator is yeast cell walls subjected to superfine grinding, and the water-retaining agent is cellulose ether.
2. The interior finishing wall render gypsum of claim 1, wherein said yeast cell walls are cell walls extracted from waste saccharomyces cerevisiae.
3. The indoor finishing wall plastering gypsum of claim 1, wherein the yeast cell wall is prepared by diluting yeast slurry with water, filtering to remove impurities, standing and settling yeast filtrate or centrifuging, washing with 1-20% sodium chloride solution and water respectively to remove odor, adding neutral protease for enzymolysis, carrying out ultrasonic crushing and enzyme deactivation treatment, centrifuging and washing until the washing solution is colorless, drying and carrying out superfine grinding to obtain the yeast cell wall.
4. The indoor finishing wall render gypsum of claim 1, wherein said yeast cell wall further comprises chloroacetic acid-modified yeast cell wall.
5. The indoor finishing wall plastering gypsum of claim 4, wherein the modification method of the chloroacetic acid modified yeast cell wall is to add the yeast cell wall obtained by superfine grinding into 0.5 mol/L chloroacetic acid solution, add the chloroacetic acid solution with the solid-to-liquid ratio of 10m L/g, heat up to 35-60 ℃, react for 0.5-3h, filter out the product and wash, perform irradiation treatment after drying, and perform irradiation metering of 1-60kGy to obtain the chloroacetic acid modified yeast cell wall.
6. The indoor finishing wall plastering gypsum of claim 1, wherein the lightweight aggregate is vitrified micro bubbles, fine sand, zeolite or a combination thereof, and the granularity is 90 to 120 meshes.
7. The indoor finishing wall plastering gypsum of claim 1, further comprising an anionic emulsifier in an amount of 0.01 to 0.04% based on the total amount of the plastering gypsum.
8. The interior finishing wall render gypsum of claim 7, wherein said anionic emulsifier is a sulfonate type emulsifier.
9. A method of plastering gypsum on a finishing interior wall surface according to any one of claims 1 to 8, comprising the steps of:
(1) substrate treatment
Cleaning the surface of the wall surface substrate, repairing and filling the caulking seams and the wire grooves, and flattening the unreserved concave-convex or hole parts;
(2) plastering for hanging net
Preparing plastering gypsum mortar, mixing desulfurized gypsum, lightweight aggregate, a calcium increasing agent, dispersible emulsion powder, a regulator and a water-retaining agent according to a ratio, adding water to adjust to a proper consistency, paving and binding at the joint of different materials of the wall body by adopting fiber mesh cloth, flattening the fiber mesh cloth, firmly bonding the tower joint lengths on two sides in a dot manner, and enabling the distance between the bonding points to be 300-fold-500 mm;
(3) punching rib
Punching control ash cakes at two ends of a wall body, punching ribs at two ends of the wall body according to the conditions of the ash cakes, and punching ribs at other parts of the wall surface by pulling wires according to the punched ribs at two ends, wherein the distance between the two ribs is 1.2-1.5m, and the width of the punched ribs is 30-50 mm;
(4) plastering gypsum batch scraper
The thickness of the batch scraping is 3-9mm, and the batch scraping is pressed by force during operation, so that the plastering gypsum mortar is firmly combined with the substrate, and the skirting part of the wall surface is plastered.
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| CN202010341899.9A CN111499328A (en) | 2020-04-27 | 2020-04-27 | Construction method for plastering gypsum and plastering indoor finish wall |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112028663A (en) * | 2020-08-31 | 2020-12-04 | 中铁十二局集团建筑安装工程有限公司 | Indoor finish-decoration wall plastering gypsum and construction process thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112028663A (en) * | 2020-08-31 | 2020-12-04 | 中铁十二局集团建筑安装工程有限公司 | Indoor finish-decoration wall plastering gypsum and construction process thereof |
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