CN112390605A - Light moisture-proof sound-insulation plastering gypsum - Google Patents
Light moisture-proof sound-insulation plastering gypsum Download PDFInfo
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- CN112390605A CN112390605A CN202011124215.6A CN202011124215A CN112390605A CN 112390605 A CN112390605 A CN 112390605A CN 202011124215 A CN202011124215 A CN 202011124215A CN 112390605 A CN112390605 A CN 112390605A
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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
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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
- 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
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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
- 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
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/40—Porous or lightweight materials
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/52—Sound-insulating materials
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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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
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- Chemical Kinetics & Catalysis (AREA)
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Abstract
The invention belongs to the field of building materials, and particularly relates to light moisture-resistant sound-insulation plastering gypsum which comprises gypsum, cement, calcium powder, vitrified micro bubbles, cellulose ether, an additive and functional resin, wherein the functional resin is a styrene thermoplastic elastomer, and the addition weight of the functional resin accounts for 12-20% of the addition weight of the gypsum. The plastering gypsum obtained by the invention has the advantages of no hollowing, sound absorption, flame retardance, heat insulation, impact resistance, environmental protection, water resistance and no powder falling, and even under the conditions of high temperature and high wind speed of a construction site in summer, the plastering gypsum still has no visible cracks and no powder falling.
Description
Technical Field
The invention belongs to the field of building materials, and particularly relates to light moisture-resistant sound-insulation plastering gypsum.
Background
The plastering gypsum is a high-efficiency and energy-saving plastering and leveling material for building interior walls and ceilings, which is prepared by adding sand, an admixture and a special composite additive into gypsum serving as a main cementing material. The dosage of the plastering gypsum in Europe reaches 50 to 70 percent of the total plastering amount, a complete system is formed in production and construction, and the plastering gypsum of nearly 400 ten thousand square meters is applied to the inner wall and the ceiling of a building every year. Plastering gypsum has just started in China, but is developed rapidly. The dosage of plastering gypsum reaches 260 ten thousand in 2012.
The plastering gypsum is used as novel wall plastering, overcomes the defects that the traditional plastering material is large in drying shrinkage, cracking, hollowing and the like and is difficult to avoid, has good workability, flowability and water retention performance, good heat preservation, heat insulation and sound insulation performance and proper fireproof performance, can be bonded with any base material, is not limited by thickness, and still has certain defects: the wall has low strength and poor water resistance, and the wall starts to be pulverized and fall off from a plastered gypsum layer after being used for a period of time, and particularly under the condition of being wetted, similar problems are easy to occur. The objective causes mainly include the following: firstly, the base layer is dried to ensure that the water absorption speed is high, so that the plaster is quickly dehydrated, the building gypsum is not hydrated to form dihydrate gypsum crystals, and the binding power between the building gypsum crystals and the base layer material is small; secondly, the construction site has high temperature and high wind speed, the surface of the plastering gypsum is quickly dried, and the internal moisture can not be diffused to the surface of the plastering layer to form plastic cracking; high temperature in summer, low supersaturation degree of dihydrate gypsum, slow crystal formation speed, long setting time of plastering gypsum, low strength of early plastering gypsum and insufficient resistance to the shrinkage of a plastering layer caused by water loss; fourthly, the construction base layer is seriously uneven, the thickness of the plaster layer is greatly fluctuated, and the plaster layer is easy to crack when the thickness exceeds 10 mm.
Therefore, Chinese invention patent application with patent publication number CN108191369A discloses plastering gypsum and a preparation method thereof in 2018, 06 and 22. The plastering gypsum comprises the following components in parts by weight: 250-350 parts of gypsum powder, 50-90 parts of low-alkali cement, 350-550 parts of washed sand, 150-250 parts of heavy calcium powder, 3-7 parts of ash calcium powder, 2-6 parts of retarder, 1-3 parts of polyvinyl alcohol, 1-3 parts of hydroxypropyl methyl cellulose and 1-3 parts of hydrophobic agent. The strength of the plastering gypsum is improved mainly by selecting the low-alkali cement, and the prepared plastering gypsum not only has the characteristics of fire prevention, sound absorption, no shrinkage, low alkalinity and the like of common plastering gypsum, but also has better strength, excellent water resistance and wider application range, and can be used in places with darkness and humidity, such as basements and the like. However, the dusting was not significantly improved.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the light moisture-resistant sound-insulation plastering gypsum which has the advantages of no hollowing, sound absorption, flame retardance, heat insulation, impact resistance, environmental friendliness, water resistance, no powder falling, no visible cracks and no powder falling even under the conditions of high temperature and high wind speed of a construction site in summer.
In order to achieve the purpose, the invention provides the following technical scheme:
the light moisture-resistant sound-insulation plastering gypsum comprises gypsum, cement, calcium powder, vitrified micro bubbles, cellulose ether, an additive and functional resin, wherein the functional resin is a styrene thermoplastic elastomer, and the addition weight of the functional resin accounts for 12-20% of the addition weight of the gypsum.
The applicant researches the application of the resin in plastering gypsum at the present stage and finds that the addition of the functional resin styrene thermoplastic elastomer in a proper amount can improve the cracking and powder dropping conditions, and the cracking and powder dropping can be still kept even under the conditions of high temperature and high wind speed.
Styrene-based thermoplastic elastomers (also called styrene Block Copolymers, SBCs for short) are currently the thermoplastic elastomers with the highest worldwide production and the most similar rubber properties. Currently, there are mainly 4 types in the SBCs series of varieties, namely: styrene-butadiene-styrene block copolymers (SBS); styrene-isoprene-styrene block copolymers (SIS); styrene-ethylene-butylene-styrene block copolymer (SEBS); styrene-ethylene-propylene-styrene type block copolymers (SEPS).
Preferably, the ethylene thermoplastic elastomer is styrene-butadiene-styrene block copolymer (SBS), which is often used as a resin modifier and can be blended with PP, PE, PS, ABS and other resins to improve the impact resistance and the flexibility of the product. In the present invention, SBS is preferred to facilitate direct fusion with other components for better functioning.
Preferably, the styrenic thermoplastic elastomer is styrene-butadiene-styrene block copolymer (SBS), styrene-ethylene-butylene-styrene block copolymer (SEBS), and urethane polymer. The carbamate polymer has certain polarity, can be better fused with a styrene-butadiene block copolymer and a styrene-isoprene block copolymer, and better plays the function of a styrene thermoplastic elastomer.
Preferably, the functional resin also comprises at least one of hydrogenated petroleum resin, terpene resin and phenolic aldehyde modified terpene resin, the improvement of the bonding force of the plastering gypsum and the base layer is one of important means for solving hollowing and cracking of the plastering gypsum layer, and the addition of one of the three resins into the functional resin is beneficial to the improvement of the bonding force of the gypsum, is not only beneficial to the improvement of the bonding force of the plastering gypsum and the base layer, but also beneficial to the improvement of the functions of cracking and powder falling in cooperation with the styrene thermoplastic elastomer.
Preferably, the amount of at least one of the hydrogenated petroleum resin, the terpene resin and the phenol-modified terpene resin is 1 to 5% by weight based on the styrene-based thermoplastic elastomer.
Preferably, the gypsum is building gypsum, the gypsum is a main cementing material of the plastering gypsum, the gypsum plays a decisive role in the performance of the plastering gypsum, the building gypsum has certain micro-expansibility, the hollowing and cracking phenomenon can not be generated in the hydration process under normal conditions, the hydration process of the building gypsum is fast, the building gypsum can be basically hydrated in 24 hours, and the volume stability is high.
Preferably, the building gypsum has a fineness of 100 to 130 meshes. If the fineness of the building gypsum is too small, the dissolving speed is slow, the supersaturation degree is low, but the water consumption is small, the pores in the hardened body are few, and the strength of the plastering gypsum hardened body is high; if the fineness of the building gypsum is too large, the specific surface area is large, the dissolution speed is high, the supersaturation degree of the dihydrate gypsum is high, the crystal precipitation and growth speed is high, the setting time is short, large crystallization stress is possibly generated, meanwhile, the water consumption is large, the pores in a hardened body are large, and the strength of the plastering gypsum is reduced on the contrary.
Preferably, the cement is low-alkali cement, the alkalinity of the gypsum can be obviously reduced by adding the low-alkali cement, when the construction is carried out by using the gypsum with high alkali content, alkali in the gypsum can react with amorphous silica aggregate, the reaction can continue to be carried out in the hardened gypsum member to cause volume expansion, internal stress is formed in the gypsum, and various destructive factors such as cracking and the like are induced. The alkali content in the gypsum is reduced, the compressive strength of the gypsum is correspondingly improved, the influence of alkalinity on a decorative layer on the surface of a wall body is reduced, and the water resistance of the material can be obviously improved by adding the low-alkali cement. The main component of the sierozem powder is calcium hydroxide, and the sierozem powder can absorb carbon dioxide in the air to form calcium carbonate crystals in the drying process and form an intricate and complex network together with components such as low-alkali cement, gypsum powder and the like, so that the strength and the water resistance of the material are enhanced; the low-alkali cement belongs to a hydraulic cementing material, and the gypsum powder and the sierozem powder belong to a gas hardening cementing material.
Cellulose ether used for plastering gypsum is specifically methyl cellulose ether, hydroxyethyl methyl cellulose ether, hydroxypropyl methyl cellulose ether or the like. Due to the introduction of nonpolar groups such as methyl and the like, the cellulose ether has the property of a surfactant, and air bubbles brought in the process of stirring and constructing the plastering gypsum are stabilized, so that the construction property of the plastering gypsum is improved. Under the action of the cellulose ether, moisture is gradually released into the substrate or air for a prolonged period of time, so that the plastering gypsum has enough time to gradually crystallize and harden with water.
The vitrified micro bubbles are hollow round particles, have high strength and are not easy to break in the manufacturing, storage and transportation and construction processes of products. The interior of the vitrified micro bubble is a porous cavity structure, and the ideal outer surface is completely closed and smooth. In fact, the surface of the vitrified microsphere is not completely sealed, so that the vitrified microsphere has higher water absorption rate, and the moisture absorbed in the vitrified microsphere can be slowly released in the later curing period of the plastering gypsum to hydrate the hemihydrate gypsum and increase the strength of the plastering gypsum leveling layer. In addition, the vitrified micro bubbles are very smooth spheres, and can play a roll ball effect in plastering gypsum, so that the construction process is smoother and faster. The grain diameter of the vitrified micro bubbles is small, and the plastering gypsum leveling layer can be decorated to be very smooth, so that the direct construction of putty on the surface is allowed. The intensity of vitrified micro bubbles is lower, can reduce the elastic modulus of plaster of plastering, and the shrinkage stress that produces is dispersed because the volume of plaster of plastering is reduced in moisture volatilization reduces, reduces the fracture of plaster of plastering screed-coat.
Preferably, the vitrified small balls are modified with a resin.
Preferably, the vitrified small balls are coated and modified by acrylic resin.
Preferably, the additives comprise slip agents, set retarders, water repellents, air entraining agents, and binders.
The slip agent comprises the following components: the mechanical stirring resistance and the shearing force resistance are enhanced.
The air entraining agent comprises: the air entraining agent can improve the workability, water retention and cohesiveness of the concrete mixture, improve the fluidity of the concrete, and introduce a large amount of additives of closed and stable micro-bubbles which are uniformly distributed in the mixing process of the concrete mixture.
The retarder is a gypsum retarder, and the conventional gypsum retarder mainly comprises three types: organic acid and its soluble salt, alkaline phosphate and protein retarder. The embodiment can select PLAST RETARD PE retarder of Italy SISISIIT 2000 company, the activity of which is not influenced by water-paste ratio, the mechanical endurance of gypsum is not influenced, the surface quality of gypsum can be improved, the surface hardness is improved, the cracking risk is reduced, and the retarder can be biodegraded and is green and environment-friendly.
The adhesive adopts starch ether, and a certain amount of starch ether is added into the light plastering gypsum, so that the gypsum slurry has excellent water-soluble and bonding properties.
The water repellent comprises at least one of calcium stearate, sodium stearate and hydrogenated silicone oil. The water repellent is a special waterproof agent for water prevention of inner and outer walls, and has the performances of acid and alkali resistance, aging resistance, carbonization resistance, moisture resistance, mildew resistance and the like. Calcium stearate, white powder, water insoluble, cold ethanol and diethyl ether, dissolved in organic solvent such as hot benzene, benzene and turpentine, etc., can be slowly decomposed when heated to 400 deg.C, and can be combustible, and can be decomposed into stearic acid and corresponding calcium salt when encountering strong acid, and has hygroscopicity. Sodium stearate, also known as sodium stearate, is a white oily powder with a greasy feel and fatty odor, is made by the interaction of stearic acid and sodium hydroxide, and is useful as a waterproofing agent. The water repellent is added into the light plastering gypsum in a certain proportion, so that the waterproof performance of the wall surface coated with the light plastering gypsum slurry can be improved, and the water resistance and the frost resistance of the coated light plastering gypsum can be improved by the mutual matching of the cement and the water repellent in a certain proportion.
Preferably, the components of the light moisture-proof sound-insulation plastering gypsum are added according to the following parts by weight:
750-800 parts of gypsum, 20-30 parts of cement, 110-120 parts of calcium powder, 50-80 parts of vitrified micro bubbles, 1-5 parts of cellulose ether, 0.1-0.5 part of a slip agent, 1-3 parts of a retarder, 1-5 parts of a water repellent, 0.1-0.5 part of an air entraining agent, 0.5-2 parts of an adhesive and 90-160 parts of a functional resin.
Preferably, the components of the light moisture-proof sound-insulation plastering gypsum are added according to the following parts by weight:
780 parts of gypsum, 20 parts of cement, 120 parts of calcium powder, 80 parts of vitrified micro bubbles, 2.5 parts of cellulose ether, 0.5 part of slip agent, 2.2 parts of retarder, 3 parts of water repellent, 0.15 part of air entraining agent, 1 part of adhesive and 150 parts of functional resin.
By implementing the technical scheme, the invention has the following advantages: the plastering gypsum obtained by the invention has the advantages of no hollowing, sound absorption, flame retardance, heat insulation, impact resistance, environmental protection, water resistance and no powder falling, and even under the conditions of high temperature and high wind speed of a construction site in summer, the plastering gypsum still has no visible cracks and no powder falling.
Detailed Description
The invention is further illustrated below with reference to specific examples and experimental data. It is to be understood that the embodiments of the present invention are merely for illustrating the present invention and not for limiting the present invention, and that various substitutions and alterations made according to the common knowledge and conventional means in the art without departing from the technical idea of the present invention are included in the scope of the present invention.
The technical schemes described in the embodiments of the present invention are conventional technical schemes unless otherwise specified, and all the reagents or formulations used are purchased from the market unless otherwise specified.
Example 1:
a light moisture-proof sound insulation plastering gypsum comprises the following components in parts by weight:
750 parts of building gypsum, 30 parts of cement, 120 parts of calcium powder, 80 parts of vitrified micro bubbles, 1-5 parts of cellulose ether, 0.5 part of a slip agent, 1 part of a retarder, 1 part of calcium stearate, 0.5 part of an air entraining agent, 0.5 part of starch ether and 90-160 parts of styrene-butadiene-styrene block copolymer (SBS) serving as an ethylene thermoplastic elastomer.
The light plastering gypsum prepared in the embodiment 1 meets the requirements of light bottom plastering gypsum in national standard GB/T28627-2012 plastering gypsum, has lighter volume weight of about 780-850 kg/m3Mortar containing no cement (1700 to 1900 kg/m)3) The half of the construction method can effectively reduce the weight of the building, greatly reduce the labor intensity of the worker in construction, and improve the construction efficiency.
Example 2:
a light moisture-proof sound insulation plastering gypsum comprises the following components in parts by weight:
800 parts of building gypsum, 20 parts of cement, 110 parts of calcium powder, 50 parts of vitrified micro bubbles, 4 parts of cellulose ether, 0.1 part of a slip agent, 1 part of a retarder, 3 parts of sodium stearate, 0.5 part of an air entraining agent, 1.5 parts of starch ether and 120 parts of functional resin, wherein the functional resin is styrene thermoplastic elastomer which is styrene-butadiene-styrene block copolymer (SBS), styrene-ethylene-butylene-styrene block copolymer (SEBS) and carbamate polymer.
The light plastering gypsum prepared in the embodiment 2 meets the requirements of light bottom plastering gypsum in national standard GB/T28627-2012 plastering gypsum, has lighter volume weight of about 750-820 kg/m3Mortar containing no cement (1700 to 1900 kg/m)3) The half of the construction method can effectively reduce the weight of the building, greatly reduce the labor intensity of the worker in construction, and improve the construction efficiency.
Example 3:
a light moisture-proof sound insulation plastering gypsum comprises the following components in parts by weight:
750 parts of building gypsum, 22 parts of low-alkali cement, 111 parts of calcium powder, 65 parts of vitrified micro bubbles, 1 part of cellulose ether, 0.5 part of slip agent, 1 part of retarder, 1 part of calcium stearate, 0.1 part of air entraining agent, 0.5 part of starch ether and 160 parts of styrene-butadiene-styrene block copolymer (SBS).
The light plastering gypsum prepared in the embodiment 3 meets the requirements of light bottom plastering gypsum in national standard GB/T28627-2012 plastering gypsum, has light volume weight of 700-790 kg/m3Mortar containing no cement (1700 to 1900 kg/m)3) The half of the construction method can effectively reduce the weight of the building, greatly reduce the labor intensity of the worker in construction, and improve the construction efficiency.
Example 4:
a light moisture-proof sound insulation plastering gypsum comprises the following components in parts by weight:
800 parts of building gypsum with the fineness of 100-130 meshes, 30 parts of low-alkali cement, 115 parts of calcium powder, 55 parts of vitrified micro bubbles, 5 parts of cellulose ether, 0.5 part of a slip agent, 1.5 parts of a retarder, 3 parts of hydrogenated silicone oil, 0.5 part of an air entraining agent, 2 parts of starch ether and 110 parts of functional resin, wherein the functional resin comprises 100 parts of styrene-butadiene-styrene block copolymer (SBS) as an ethylene thermoplastic elastomer and 10 parts of hydrogenated petroleum resin.
The light plastering gypsum prepared in the embodiment 4 meets the requirements of light bottom plastering gypsum in national standard GB/T28627-2012 plastering gypsum, has light volume weight of 700-790 kg/m3Mortar containing no cement (1700 to 1900 kg/m)3) The half of the construction method can effectively reduce the weight of the building, greatly reduce the labor intensity of the worker in construction, and improve the construction efficiency.
Example 5:
a light moisture-proof sound insulation plastering gypsum comprises the following components in parts by weight:
760 parts of building gypsum with the fineness of 100-130 meshes, 20 parts of low-alkali cement, 110 parts of calcium powder, 75 parts of vitrified micro bubbles, 4 parts of cellulose ether, 0.2 part of a slip agent, 1 part of a retarder, 5 parts of calcium stearate, 0.2 part of an air entraining agent, 0.5 part of starch ether and 130 parts of functional resin, wherein the functional resin comprises 100 parts of styrene-butadiene-styrene block copolymer (SBS) and 30 parts of terpene resin serving as an ethylene thermoplastic elastomer.
The light plastering gypsum prepared in the embodiment 5 meets the requirements of light bottom plastering gypsum in national standard GB/T28627-2012 plastering gypsum, has light volume weight of 700-790 kg/m3Mortar containing no cement (1700 to 1900 kg/m)3) The half of the construction method can effectively reduce the weight of the building, greatly reduce the labor intensity of the worker in construction, and improve the construction efficiency.
Example 6:
a light moisture-proof sound insulation plastering gypsum comprises the following components in parts by weight:
780 parts of building gypsum with the fineness of 100-130 meshes, 20 parts of low-alkali cement, 120 parts of calcium powder, 80 parts of vitrified micro-beads coated by acrylic resin, 2.5 parts of cellulose ether, 0.5 part of a slip agent, 2.2 parts of a retarder, 3 parts of calcium stearate, 0.15 part of an air entraining agent, 1 part of starch ether and 150 parts of functional resin, wherein the functional resin comprises 100 parts of styrene-butadiene-styrene block copolymer (SBS) as an ethylene thermoplastic elastomer and 50 parts of phenolic aldehyde modified terpene resin.
The light plastering gypsum prepared in the embodiment 6 meets the requirements of light bottom plastering gypsum in national standard GB/T28627-2012 plastering gypsum, has light volume weight of 700-790 kg/m3Mortar containing no cement (1700 to 1900 kg/m)3) The half of the construction method can effectively reduce the weight of the building, greatly reduce the labor intensity of the worker in construction, and improve the construction efficiency.
Comparative example 1:
a light moisture-proof sound insulation plastering gypsum comprises the following components in parts by weight: 750 parts of building gypsum, 30 parts of cement, 120 parts of calcium powder, 80 parts of vitrified micro bubbles, 1-5 parts of cellulose ether, 0.5 part of slip agent, 1 part of retarder, 1 part of water repellent, 0.5 part of air entraining agent and 0.5 part of adhesive.
The difference from example 1 is that no functional resin was added.
Comparative example 2:
a light moisture-proof sound insulation plastering gypsum comprises the following components in parts by weight: 750 parts of building gypsum, 30 parts of cement, 120 parts of calcium powder, 80 parts of vitrified micro bubbles, 1-5 parts of cellulose ether, 0.5 part of slip agent, 1 part of retarder, 1 part of water repellent, 0.5 part of air entraining agent and 0.5 part of adhesive.
The difference from example 1 is that an acrylic resin is used as the functional resin.
And (3) performance testing:
the light plastering gypsum obtained in each example was tested for cracking and dusting:
the method comprises the following steps: the lightweight plastering gypsum obtained in each example is prepared into gypsum blocks with the length of 100cm, the width of 100cm and the thickness of 5cm by the same method, and is placed for six months in a natural environment (placed in an outdoor natural environment), a high-temperature environment (60 ℃ and no wind) and a high-temperature windy environment (60 ℃ and wind speed of 15m/min), and the crack condition and the dusting condition are detected:
evaluation criteria for cracking conditions:
very good: no obvious cracks.
O: a small number of less distinct cracks appeared (less than 5% of the total area).
X: macroscopic cracks (more than 30% of the total area) appeared.
Evaluation standard of powder falling condition:
■: no obvious powder falling.
□: there was a small amount of less noticeable dusting.
The results are shown in Table 1:
Claims (10)
1. the light moisture-resistant sound-insulation plastering gypsum comprises gypsum, cement, calcium powder, vitrified micro bubbles, cellulose ether and an additive, and is characterized by further comprising a functional resin, wherein the functional resin is a styrene thermoplastic elastomer, and the addition weight of the functional resin accounts for 12-20% of the addition weight of the gypsum.
2. The lightweight moisture resistant acoustic plastering gypsum of claim 1, wherein said ethylene based thermoplastic elastomer is a styrene-butadiene-styrene block copolymer.
3. The lightweight moisture resistant acoustic plastering gypsum of claim 1, wherein the styrenic thermoplastic elastomer comprises styrene-butadiene-styrene block copolymer, styrene-ethylene-butylene-styrene block copolymer and urethane polymer.
4. The lightweight moisture-resistant soundproof plastering gypsum according to claim 1, 2 or 3, wherein the functional resin further comprises at least one of a hydrogenated petroleum resin, a terpene resin and a phenolic-modified terpene resin.
5. The lightweight moisture-resistant sound-proofing plastering gypsum of claim 4, wherein at least one of the hydrogenated petroleum resin, terpene resin and phenolic-modified terpene resin is added in an amount of 1 to 5% by weight based on the styrene-based thermoplastic elastomer.
6. The lightweight moisture-resistant sound-proofing plastering gypsum according to claim 1, wherein said vitrified beads are modified with a resin.
7. The lightweight moisture-proof sound-proof plastering gypsum of claim 6, wherein the vitrified microspheres are coated and modified with acrylic resin.
8. The lightweight moisture-resistant sound-proofing plastering gypsum of claim 1, wherein the additives comprise slip agents, set retarders, water repellents, air-entraining agents, and adhesives.
9. The lightweight moisture-proof soundproof plastering gypsum of claim 8, wherein the lightweight moisture-proof soundproof plastering gypsum comprises the following components in parts by weight:
750-800 parts of gypsum, 20-30 parts of cement, 110-120 parts of calcium powder, 50-80 parts of vitrified micro bubbles, 1-5 parts of cellulose ether, 0.1-0.5 part of a slip agent, 1-3 parts of a retarder, 1-5 parts of a water repellent, 0.1-0.5 part of an air entraining agent, 0.5-2 parts of an adhesive and 90-160 parts of a functional resin.
10. The lightweight moisture-proof soundproof plastering gypsum according to claim 9, wherein the lightweight moisture-proof soundproof plastering gypsum comprises the following components in parts by weight:
780 parts of gypsum, 20 parts of cement, 120 parts of calcium powder, 80 parts of vitrified micro bubbles, 2.5 parts of cellulose ether, 0.5 part of slip agent, 2.2 parts of retarder, 3 parts of water repellent, 0.15 part of air entraining agent, 1 part of adhesive and 150 parts of functional resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011124215.6A CN112390605A (en) | 2020-10-20 | 2020-10-20 | Light moisture-proof sound-insulation plastering gypsum |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011124215.6A CN112390605A (en) | 2020-10-20 | 2020-10-20 | Light moisture-proof sound-insulation plastering gypsum |
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Cited By (3)
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| CN113248223A (en) * | 2021-04-28 | 2021-08-13 | 浙申环保材料(宁波)有限公司 | Self-leveling gypsum |
| CN113896492A (en) * | 2021-10-27 | 2022-01-07 | 湖南华材友邦科技有限责任公司 | Water-resistant heat-preservation plastering gypsum and preparation method thereof |
| CN113955966A (en) * | 2021-12-10 | 2022-01-21 | 广东龙湖科技股份有限公司 | Multifunctional auxiliary agent for mortar, preparation method and gypsum-based light plastering mortar composition |
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| CN113248223A (en) * | 2021-04-28 | 2021-08-13 | 浙申环保材料(宁波)有限公司 | Self-leveling gypsum |
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| CN113955966A (en) * | 2021-12-10 | 2022-01-21 | 广东龙湖科技股份有限公司 | Multifunctional auxiliary agent for mortar, preparation method and gypsum-based light plastering mortar composition |
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