CN114349453A - High-coating-rate light gypsum mortar - Google Patents
High-coating-rate light gypsum mortar Download PDFInfo
- Publication number
- CN114349453A CN114349453A CN202111667238.6A CN202111667238A CN114349453A CN 114349453 A CN114349453 A CN 114349453A CN 202111667238 A CN202111667238 A CN 202111667238A CN 114349453 A CN114349453 A CN 114349453A
- Authority
- CN
- China
- Prior art keywords
- meshes
- parts
- equal
- less
- gypsum mortar
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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
-
- 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
- C04B2111/00508—Cement paints
-
- 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
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
Abstract
The invention discloses a high-coating-rate light gypsum mortar which is prepared from the following raw materials in parts by weight: 900 parts of semi-hydrated gypsum, 30-160 parts of light aggregate particles, 0-15 parts of dispersible emulsion powder, 0.25-3 parts of retarder and 0.5-5 parts of water-retaining agent; the lightweight aggregate particles refer to closed-cell vitrified micro-beads and/or open-cell perlite; and the particle diameters of the light aggregate are divided into four types, which are respectively: 20 meshes to 30 meshes, 30 meshes to 50 meshes, 50 meshes to 100 meshes and less than 100 meshes, and the weight proportion of the four kinds of particle size lightweight aggregate is (0-2): (6-10): (4-8): (3-7). By adjusting the grading range of the lightweight aggregate particles, the coating rate of the lightweight gypsum mortar is improved while the strength of the lightweight gypsum mortar is not influenced.
Description
Technical Field
The invention belongs to the field of building materials for plastering of building interior walls, and particularly relates to light gypsum mortar with high coating rate.
Background
With the development and progress of society, people have higher and higher quality requirements and construction requirements for the building industry. The light gypsum mortar is a novel inner wall plastering material prepared by taking inorganic cementing material gypsum as a cementing material and doping light aggregate and other additives, can effectively solve the quality defects of hollowing, cracking and the like, and is particularly favored by the construction industry because of light performance, high coating rate per unit area and high cost performance of the product.
Lightweight aggregate is generally added to lightweight gypsum mortar to adjust the coating rate of the gypsum mortar. The properties of the lightweight aggregate, such as bulk density, fineness, particle size distribution and the like, directly affect the coating rate and product strength of the gypsum mortar. In the market, in order to obtain higher coating rate, some manufacturers mix too much or poor-graded lightweight aggregate into gypsum mortar, so that the strength of the gypsum mortar is reduced, and the construction performance of the product is seriously influenced.
Disclosure of Invention
In order to solve the problem that the strength and the coating rate of the existing light gypsum mortar are deviated from each other, the invention provides the light gypsum mortar with high coating rate.
According to the high-coating-rate lightweight gypsum mortar, the coating rate is improved while the strength of the lightweight gypsum mortar is not influenced by adjusting the grading range of the lightweight aggregate particles.
The light gypsum mortar is prepared from the following raw materials in parts by weight:
650-weight portions of hemihydrate gypsum and 900 portions of hemihydrate gypsum,
30-160 parts of light aggregate particles,
0 to 15 parts of dispersible latex powder,
0.25 to 3 portions of retarder,
0.5-5 parts of a water-retaining agent.
The lightweight aggregate particles refer to closed-cell vitrified micro-beads and/or open-cell perlite; the particle size range of the lightweight aggregate is less than or equal to 0.85mm, namely the passing rate of the sieve mesh with the aperture of 0.85mm (20 meshes) is 100 percent;
and the particle diameters of the lightweight aggregate are divided into four types, which are respectively: 20 meshes to 30 meshes, 30 meshes to 50 meshes, 50 meshes to 100 meshes and less than 100 meshes, and the weight proportion of the four kinds of particle size lightweight aggregate is (0-2): (6-10): (4-8): (3-7).
In the case where the bulk densities of the lightweight aggregates are uniform (bulk density fluctuation. + -. 1.5 kg/m)3) Coating of gypsum mortar within the range of the fineness ratio of the lightweight aggregate particlesThe cloth rate is high; when the fineness of the lightweight aggregate particles exceeds this range, the coating rate of the gypsum mortar is reduced.
The semi-hydrated gypsum is calcined by-product of flue gas desulfurization technology of a thermal power plant, and the purity of the desulfurized gypsum is more than or equal to 85%.
The particle size of the closed-pore vitrified micro bubbles is less than or equal to 0.85mm, and the bulk density is more than 80kg/m3The cylinder pressure strength is more than or equal to 200kPa, the heat conductivity coefficient is less than or equal to 0.070W/(m.K), the volume water absorption is less than or equal to 45 percent, and the volume floating rate is more than or equal to 80 percent.
The grain diameter of the open-pore vitrified micro bubbles is less than or equal to 0.85mm, and the bulk density is more than 80kg/m3The cylinder pressure strength is more than or equal to 200kPa, the heat conductivity coefficient is less than or equal to 0.070W/(m.K), the volume water absorption is less than or equal to 45 percent, and the volume floating rate is more than or equal to 80 percent.
The dispersible latex powder adopts one, two or three of ethylene-vinyl acetate copolymer, acrylic acid copolymer and polyvinyl alcohol.
The retarder adopts one or two of bone glue protein and sugar calcium gypsum retarder materials.
The water retention agent adopts hydroxyethyl methyl cellulose or hydroxypropyl methyl cellulose, and the viscosity of the water retention agent is 30000-200000 mPa.
Under the condition of the same stacking density of the lightweight aggregate, the invention greatly improves the coating rate of the lightweight gypsum mortar by adjusting the grading of the lightweight aggregate particles, and does not influence the strength and the construction performance of the lightweight gypsum mortar.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to specific embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The raw material proportions of the examples and the comparative examples are as follows:
the raw material ratios of the examples 1 to 5, the comparative examples 1 to 2 are as follows: 853 parts of semi-hydrated gypsum, 135 parts of closed-pore vitrified micro-beads, 6.7 parts of dispersible emulsion powder, 1.3 parts of retarder and 4 parts of water-retaining agent.
The raw material ratio of the embodiment 6 is as follows: 853 parts of semi-hydrated gypsum, 135 parts of open-pore perlite, 6.7 parts of dispersible emulsion powder, 1.3 parts of retarder and 4 parts of water-retaining agent.
The raw material ratio of the embodiment 7 is as follows: 853 parts of semi-hydrated gypsum, 105 parts of closed-pore vitrified micro-beads, 30 parts of open-pore pearls, 6.7 parts of dispersible latex powder, 1.3 parts of retarder and 4 parts of water-retaining agent.
The raw material ratio of the embodiment 8 is as follows: 853 parts of semi-hydrated gypsum, 35 parts of closed-cell vitrified micro-beads, 100 parts of open-cell perlite, 6.7 parts of dispersible emulsion powder, 1.3 parts of retarder and 4 parts of water-retaining agent.
The raw materials in the above examples were all commercially available, and the bulk density of the lightweight aggregate was 105. + -. 1.5kg/m3In the case where the fluctuation in bulk density is small, the particle size distribution is different between the examples and the comparative examples;
TABLE Dry volume weight and particle size distribution of the examples and comparative examples
In table two, the coating rate was measured: adding 10kg of material into appropriate water, stirring for 1min to obtain uniformly stirred gypsum mortar, and uniformly coating the gypsum mortar in a prefabricated test mold frame, wherein the size of the test mold frame is 1m x 2m, and the thickness of the test mold frame is 10 mm. The actual application area of 10kg of gypsum mortar dry powder was measured.
TABLE II examples and comparative examples Properties of Gypsum mortars
Example 1-example 8, the lightweight aggregate was blended with either closed cell vitrified beads or open cell perlite or both, within the specified particle size range of the lightweight aggregate of less than or equal to 0.85 mm; and the particle composition of the lightweight aggregate is as follows: 0-10% of 20-30 mesh ratio;30-50% of 30-50 mesh; 20-40% of 50-100 meshes and 15-35% of less than 100 meshes. Under the condition that the particle grading range of the closed-cell vitrified micro bubbles is within the particle grading range and the stacking density of the closed-cell vitrified micro bubbles is consistent, the actual coating area of the gypsum mortar dry powder is 1.70m2More than 10kg, the folding strength and the compressive strength meet the strength requirement in GB/T28627-2012 plastering gypsum, and the product has moderate viscosity and good construction performance.
Comparative examples 1 to 2, the lightweight aggregate particles were mostly in the range of 20 to 50 mesh, i.e., large particles were more and particles smaller than 50 mesh were less. In the case of a large number of large particles, the voids between the particles are large, and in the gypsum mortar, the large voids are replaced by the gypsum slurry, and the volume per unit mass of comparative examples 1 and 2 is reduced, resulting in a coating rate that is apparently not high. Compared with the comparative examples 1 and 2, the selected lightweight aggregate has certain bulk density, but more large particles in the particles, poor particle grading, lower actual coating area of the gypsum mortar dry powder, non-fine slurry, poor viscosity and low flatness of the coated surface after construction.
Claims (7)
1. The high-coating-rate light gypsum mortar is prepared from the following raw materials in parts by weight: 900 parts of semi-hydrated gypsum, 30-160 parts of light aggregate particles, 0-15 parts of dispersible emulsion powder, 0.25-3 parts of retarder and 0.5-5 parts of water-retaining agent; the method is characterized in that:
the lightweight aggregate particles refer to closed-cell vitrified micro-beads and/or open-cell perlite; the particle size range of the lightweight aggregate is less than or equal to 0.85mm, namely the passing rate of the sieve mesh with the aperture of 0.85mm (20 meshes) is 100 percent;
and the particle diameters of the light aggregate are divided into four types, which are respectively: 20 meshes to 30 meshes, 30 meshes to 50 meshes, 50 meshes to 100 meshes and less than 100 meshes, and the weight proportion of the four kinds of particle size lightweight aggregate is (0-2): (6-10): (4-8): (3-7).
2. The high-coatability light gypsum mortar of claim 1, wherein: the semi-hydrated gypsum is calcined by-product of flue gas desulfurization technology of a thermal power plant, and the purity of the desulfurized gypsum is more than or equal to 85%.
3. The high-coatability light gypsum mortar of claim 1, wherein: the particle size of the closed-pore vitrified micro bubbles is less than or equal to 0.85mm, and the bulk density is more than 80kg/m3The cylinder pressure strength is more than or equal to 200kPa, the heat conductivity coefficient is less than or equal to 0.070W/(m.K), the volume water absorption is less than or equal to 45 percent, and the volume floating rate is more than or equal to 80 percent.
4. The high-coatability light gypsum mortar of claim 1, wherein: the grain diameter of the open-pore vitrified micro bubbles is less than or equal to 0.85mm, and the bulk density is more than 80kg/m3The cylinder pressure strength is more than or equal to 200kPa, the heat conductivity coefficient is less than or equal to 0.070W/(m.K), the volume water absorption is less than or equal to 45 percent, and the volume floating rate is more than or equal to 80 percent.
5. The high-coatability light gypsum mortar of claim 1, wherein: the dispersible latex powder adopts one, two or three of ethylene-vinyl acetate copolymer, acrylic acid copolymer and polyvinyl alcohol.
6. The high-coatability light gypsum mortar of claim 1, wherein: the retarder adopts one or two of bone glue protein and sugar calcium gypsum retarder materials.
7. The high-coatability light gypsum mortar of claim 1, wherein: the water retention agent adopts hydroxyethyl methyl cellulose or hydroxypropyl methyl cellulose, and the viscosity of the water retention agent is 30000-200000 mPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111667238.6A CN114349453A (en) | 2021-12-31 | 2021-12-31 | High-coating-rate light gypsum mortar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111667238.6A CN114349453A (en) | 2021-12-31 | 2021-12-31 | High-coating-rate light gypsum mortar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114349453A true CN114349453A (en) | 2022-04-15 |
Family
ID=81104766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111667238.6A Pending CN114349453A (en) | 2021-12-31 | 2021-12-31 | High-coating-rate light gypsum mortar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114349453A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114685135A (en) * | 2022-05-10 | 2022-07-01 | 江苏吉邦材料科技有限公司 | Light gypsum mortar with high coating rate |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05201757A (en) * | 1992-01-10 | 1993-08-10 | Koopu Chem Kk | Cured body of gypsum |
| CN111423249A (en) * | 2020-05-28 | 2020-07-17 | 杰森石膏板（嘉兴）有限公司 | Gypsum-based lightweight plastering material and preparation method thereof |
| CN111439983A (en) * | 2019-12-19 | 2020-07-24 | 嘉兴创奇环保材料有限公司 | Light inner wall heat insulation gypsum mortar and production process thereof |
| CN112159184A (en) * | 2020-07-13 | 2021-01-01 | 维德斯新材料(上海)有限公司 | Multifunctional base material for interior wall and preparation method thereof |
-
2021
- 2021-12-31 CN CN202111667238.6A patent/CN114349453A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05201757A (en) * | 1992-01-10 | 1993-08-10 | Koopu Chem Kk | Cured body of gypsum |
| CN111439983A (en) * | 2019-12-19 | 2020-07-24 | 嘉兴创奇环保材料有限公司 | Light inner wall heat insulation gypsum mortar and production process thereof |
| CN111423249A (en) * | 2020-05-28 | 2020-07-17 | 杰森石膏板（嘉兴）有限公司 | Gypsum-based lightweight plastering material and preparation method thereof |
| CN112159184A (en) * | 2020-07-13 | 2021-01-01 | 维德斯新材料(上海)有限公司 | Multifunctional base material for interior wall and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114685135A (en) * | 2022-05-10 | 2022-07-01 | 江苏吉邦材料科技有限公司 | Light gypsum mortar with high coating rate |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110105013B (en) | High-strength anti-cracking foam concrete and preparation method thereof | |
| CN110395946B (en) | Preparation method of aerogel-vitrified microsphere composite mortar for external wall heat insulation | |
| CN114276107B (en) | Quick-calcined light plastering gypsum and preparation method thereof | |
| CN109776061B (en) | Light high-strength type external wall internal thermal insulation gypsum and preparation method thereof | |
| CN107098667B (en) | Gypsum base light energy conservation plate and preparation method thereof | |
| CN105948646B (en) | A kind of dry-mixed mortar of fire-retardant noise reduction insulation | |
| CN108892451B (en) | Lightweight concrete, lightweight concrete prefabricated part, preparation method of lightweight concrete prefabricated part and building material | |
| CN114349453A (en) | High-coating-rate light gypsum mortar | |
| CN108751900A (en) | High-performance reflective insulation gypsum base compound insulating material and preparation method thereof | |
| CN115108796A (en) | Lightweight plastering gypsum and preparation method thereof | |
| CN113666682A (en) | Anti-crack foam light soil and preparation method thereof | |
| CN113307555B (en) | Preparation method of light insulation board | |
| CN112174604A (en) | Dry-mixed masonry mortar | |
| CN115340345B (en) | Gypsum-based plastering mortar with high coating rate | |
| CN114804772B (en) | Light plastering mortar and using method thereof | |
| CN110894151A (en) | 3D printing building ink capable of being constructed in winter and preparation method thereof | |
| CN115353412A (en) | Calcium magnesium silicate light heat-preservation and heat-insulation wall material and preparation method thereof | |
| CN109592942A (en) | A kind of three-in-one dry-mixed mortar | |
| CN113880513A (en) | Anti-efflorescence ceramic tile glue and preparation method thereof | |
| CN112625489A (en) | Humidity-adjustable interior wall heat-insulating putty powder | |
| CN114685135A (en) | Light gypsum mortar with high coating rate | |
| CN117567119A (en) | Light gypsum mortar with high coating rate and excellent water retention | |
| CN116730695A (en) | Early-strength heat-insulation type light plastering gypsum mortar and preparation method thereof | |
| CN114292079A (en) | Plastering gypsum mortar and preparation method thereof | |
| CN117902917A (en) | Heat-insulating lightweight aggregate concrete and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |