CN109776061B - Light high-strength type external wall internal thermal insulation gypsum and preparation method thereof - Google Patents
Light high-strength type external wall internal thermal insulation gypsum and preparation method thereof Download PDFInfo
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Abstract
The invention relates to a lightweight high-strength type internal thermal insulation gypsum for an external wall, which comprises the following raw materials in parts by mass: 100 parts of building gypsum, 5-15 parts of cement, 40-60 parts of vitrified micro bubbles, 120-170 parts of water, 0.2-0.6 part of adhesive, 0.2-0.5 part of water-retaining agent, 0.3-0.9 part of water reducing agent, 0.2-0.5 part of retarder and 0.4-1.2 parts of polymer fiber. The invention adopts various means such as particle grading optimization, water reducing agent and the like to reduce the water demand under the standard working consistency, cement to increase hydration products, retarder compounding and the like to carry out enhancement modification treatment on the internal thermal insulation gypsum of the external wall, and the prepared light high-strength internal thermal insulation gypsum of the external wall has excellent thermal insulation performance, can greatly reduce the energy consumption of building operation and has higher strength. Solves the strength problem and the workability problem of the heat preservation gypsum on the basis of good low-density heat preservation performance.
Description
Technical Field
The invention belongs to the technical field of building thermal insulation materials, relates to a lightweight high-strength type internal thermal insulation gypsum for an external wall, and further relates to a preparation method of the lightweight high-strength internal thermal insulation gypsum.
Background
With the deep popularization and application of energy-saving buildings, the basic requirements of building energy conservation can be met only by adopting heat insulation measures on the outer walls of the buildings. The building external wall heat preservation is divided into external heat preservation, internal heat preservation and self heat preservation, and the external heat preservation is more suitable for areas mainly taking heat preservation, such as the north of China; the internal heat preservation is suitable for areas mainly with heat insulation, such as the south of China.
At present, two technical approaches of thermal insulation boards and thermal insulation slurry are mainly used for internal thermal insulation of the external wall. Among the heat-insulating plates, the inorganic plates have the problems that the shape of the inorganic plates is poor in adaptability to the increasing foreign buildings, the treatment of particularly small parts is difficult, and the organic plates have fire-fighting hidden dangers. The heat preservation slurry is prepared by mainly taking various light materials as aggregate, taking cement as a cementing material and mixing with some modified additives at the present stage; the cement is used as a cementing material, so that the production energy consumption is high, the carbon emission is large, and the product has the defects of easiness in hollowing and cracking, slow setting and hardening, long construction period and the like.
The heat insulating gypsum plaster for outer wall is one kind of heat insulating gypsum plaster material prepared with gypsum and light aggregate as main material. Compared with cement-based heat insulation materials, the gypsum is a green building material which can be recycled and has small environmental load, is a non-combustible material, and has micro-expansibility to effectively avoid cracking and hollowing. However, the general heat-insulating gypsum for the outer wall is used for the internal heat insulation of the outer wall of a building, and has several key problems: the contradiction between the strength and the density of the heat-preservation gypsum in the outer wall is solved. Generally, the higher the strength, the higher the density and thus the higher the thermal conductivity, the poorer the thermal insulation performance. The contradiction between heat preservation and insulation and workability. Generally, the better the heat insulation, the lower the workability, and in particular, the less spreadability.
Disclosure of Invention
In view of the above, the present invention provides a lightweight high-strength thermal-insulation gypsum for use in an exterior wall, and a method for preparing the same.
In order to achieve the purpose, the invention provides the following technical scheme:
1. the light high-strength type heat-insulation gypsum for the outer wall comprises the following raw materials in parts by mass:
100 parts of building gypsum, 5-15 parts of cement, 40-60 parts of vitrified micro bubbles, 120-170 parts of water, 0.2-0.6 part of adhesive, 0.2-0.5 part of water-retaining agent, 0.3-0.9 part of water reducing agent, 0.2-0.5 part of retarder and 0.4-1.2 parts of polymer fiber.
Further, the heat-insulating gypsum for the outer wall comprises the following raw materials in parts by weight:
100 parts of building gypsum, 10 parts of cement, 50 parts of vitrified micro bubbles, 150 parts of water, 0.5 part of adhesive, 0.45 part of water-retaining agent, 0.7 part of water reducing agent, 0.2 part of retarder and 0.7 part of polymer fiber.
Furthermore, the particle size of the building gypsum is 45-145 μm.
Furthermore, the cement is 42.5-grade sulphoaluminate cement, and the grain size is less than 45 microns.
Further, the building gypsum is prepared from the following components in percentage by mass according to the particle size of 45-80 μm: 80-145 μm ═ 40: 60.
further, the mass ratio of the cement to the particle size is <15 μm: 60:40 is equal to 15-45 μm.
Further, the particle size of the vitrified micro bubbles is 145-250 μm, the mass ratio of the vitrified micro bubbles according to the particle size is 80-180 μm: 180-250 um is 16: 9.
Further, the adhesive is re-dispersible emulsion powder of vinyl acetate-ethylene copolymer; the water-retaining agent is hydroxypropyl methyl cellulose ether; the water reducing agent is a sulfonated melamine water reducing agent; the retarder is prepared from citric acid and bone glue protein according to a mass ratio of 1: 2, mixing the components.
Further, the polymer fiber is a polypropylene fiber having a diameter of 15 μm and a length of 3 mm.
2. The preparation method of the light high-strength internal thermal-insulation gypsum for the external wall is also provided, and the light high-strength internal thermal-insulation gypsum for the external wall can be obtained by adding water into all raw materials according to the proportion and uniformly stirring.
The heat-insulating gypsum for the outer wall comprises the following raw materials in parts by weight:
100 parts of building gypsum, 5-15 parts of cement, 40-60 parts of vitrified micro bubbles, 120-170 parts of water, 0.2-0.6 part of adhesive, 0.2-0.5 part of water-retaining agent, 0.3-0.9 part of water reducing agent, 0.2-0.5 part of retarder and 0.4-1.2 parts of polymer fiber.
Furthermore, the particle size of the building gypsum is 45-145 μm.
Furthermore, the cement is 42.5-grade sulphoaluminate cement, and the grain size is less than 45 microns.
Further, the building gypsum is prepared from the following components in percentage by mass according to the particle size of 45-80 μm: 80-145 μm ═ 40: 60.
further, the mass ratio of the cement to the particle size is <15 μm: 60:40 is equal to 15-45 μm.
Further, the particle size of the vitrified micro bubbles is 145-250 μm, the mass ratio of the vitrified micro bubbles according to the particle size is 80-180 μm: 180-250 um is 16: 9.
Further, the adhesive is re-dispersible emulsion powder of vinyl acetate-ethylene copolymer; the water-retaining agent is hydroxypropyl methyl cellulose ether; the water reducing agent is a sulfonated melamine water reducing agent; the retarder is prepared from citric acid and bone glue protein according to a mass ratio of 1: 2, mixing the components.
Further, the polymer fiber is a polypropylene fiber having a diameter of 15 μm and a length of 3 mm.
The invention has the beneficial effects that: the gypsum is a green building material which can be recycled and has small environmental load and is a non-combustible material; the defects that the heat-insulating slurry prepared by cement is easy to hollowly and crack, is slow in setting and hardening, and has long construction period are overcome, and the cement is a cementing material with high resource consumption, high energy consumption and high environmental load. Secondly, the invention carries out particle grading optimization on the binding materials such as building gypsum, cement and the like and the vitrified microsphere light aggregate on the whole, realizes orderly filling of coarse and fine particles in the mixture step by step, and achieves a dense accumulation state, thereby greatly reducing the water demand of the slurry under the standard working consistency and being very beneficial to strength increase; the C-S-H gel generated by hydration of the early-strength sulphoaluminate cement plays a role in filling a framework and compacting a hardened body structure, thereby achieving the aim of enhancing modification. The sulfonated melamine water reducing agent further reduces the water consumption required when the slurry reaches the standard working consistency, thereby improving the compactness of a hardened body and playing a role in obviously enhancing and modifying; the mass ratio of the citric acid to the bone glue protein is 1: 2, the compound has good retarding effect and avoids the excessive loss of strength; the polypropylene fiber can effectively improve the crack resistance of the matrix. The invention adopts various means such as particle grading optimization, water reducing agent and the like to reduce the water demand under the standard working consistency, cement to increase hydration products, retarder compounding and the like to carry out enhancement modification treatment on the external wall internal heat insulation gypsum, and the prepared external wall internal heat insulation gypsum has excellent heat insulation performance, can greatly reduce the building operation energy consumption and has higher strength. The strength problem and the workability problem of the heat-insulating gypsum in the outer wall on the basis of low density and good heat-insulating property are solved.
Detailed Description
The following describes in detail preferred embodiments of the present invention. The experimental procedures, in which specific conditions are not specified in the examples, are generally carried out under conventional conditions or under conditions recommended by the manufacturers.
Example 1
The light high-strength heat-insulating gypsum for the inner wall of the outer wall takes 100kg of the used building gypsum as an example, and the used raw materials and the mass thereof are as follows:
wherein: the particle size of the building gypsum is 45-145 mu m, and the mass ratio of the particles distributed in two ranges of 45-80 mu m and 80-145 mu m is respectively 40: 60, adding a solvent to the mixture;
the cement is 42.5-grade sulphoaluminate cement, the grain size is less than 45 mu m, and the mass ratio of the grain distribution in two ranges of <15 mu m and 15 mu m-45 mu m is respectively 60: 40;
the grain size of the vitrified micro bubbles is 145-250 μm, and the mass ratio of the grains distributed in two ranges of 145-180 μm and 180-250 μm is respectively 35: 65;
according to the invention, the particle grading optimization is carried out on the binding materials such as building gypsum and cement and the vitrified microsphere light aggregate on the whole, so that the step-by-step orderly filling of coarse and fine particles in the mixture is realized, and a dense accumulation state is reached, thereby greatly reducing the water demand of the slurry under the standard working consistency and being very beneficial to the strength increase.
The water is common tap water;
the adhesive is re-dispersible emulsion powder of vinyl acetate-ethylene copolymer; white powder with the grain diameter of 0.2-2 mu m, the content of non-volatile matters more than or equal to 98 percent and the tensile strength of 5.6 MPa.
The water retention agent is hydroxypropyl methyl cellulose ether (HPMC), is white powder, has particle size of less than 180 μm, and has viscosity of 15 ten thousand.
The water reducing agent is a powdery sulfonated melamine water reducing agent.
The retarder is citric acid and bone glue protein according to the mass ratio of 1: 2, mixing the components.
The polymer fibers were polypropylene fibers having a diameter of 15 μm and a length of 3 mm.
The building gypsum material adopted by the invention is a green environment-friendly recyclable material with zero environmental load,
the preparation method comprises the following steps: all the raw materials are added with water according to the proportion and stirred evenly, and the light high-strength type heat-insulating gypsum in the outer wall can be obtained.
The inner side of the outer wall is applied with heat-insulating gypsum.
Example 2
The light high-strength heat-insulating gypsum for the inner wall of the outer wall takes 100kg of the used building gypsum as an example, and the used raw materials and the mass thereof are as follows:
the specifications and preparation method of the raw materials are the same as those of example 1.
Example 3
The light high-strength heat-insulating gypsum for the inner wall of the outer wall takes 100kg of the used building gypsum as an example, and the used raw materials and the mass thereof are as follows:
the specifications and preparation method of the raw materials are the same as those of example 1.
Example 4
The light high-strength heat-insulating gypsum for the inner wall of the outer wall takes 100kg of the used building gypsum as an example, and the used raw materials and the mass thereof are as follows:
the specifications and preparation method of the raw materials are the same as those of example 1.
Example 5
The light high-strength heat-insulating gypsum for the inner wall of the outer wall takes 100kg of the used building gypsum as an example, and the used raw materials and the mass thereof are as follows:
the specifications and preparation method of the raw materials are the same as those of example 1.
Example 6
The light high-strength heat-insulating gypsum for the inner wall of the outer wall takes 100kg of the used building gypsum as an example, and the used raw materials and the mass thereof are as follows:
the specifications and preparation method of the raw materials are the same as those of example 1.
In order to confirm the performance of the thermal insulation gypsum for exterior walls according to the present invention, the inventors of examples 1 to 6 carried out a number of tests, and the results are shown in Table 1.
TABLE 1 examples 1-6 product Properties
As can be seen from table 1, the dry density and the thermal conductivity of the heat-insulating gypsum in the outer wall of the invention are small, so that the heat-insulating effect is remarkably improved, the operation energy consumption of the building is greatly reduced, and the energy use efficiency is improved; meanwhile, the material has higher strength, and the combustion performance of the material is non-combustible (A grade).
Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (4)
1. The lightweight high-strength internal thermal insulation gypsum for the external wall is characterized by comprising the following raw materials in parts by mass:
100 parts of building gypsum, 5-15 parts of cement, 40-60 parts of vitrified micro bubbles, 120-170 parts of water, 0.2-0.6 part of adhesive, 0.2-0.5 part of water-retaining agent, 0.3-0.9 part of water reducing agent, 0.2-0.5 part of retarder and 0.4-1.2 parts of polymer fiber; the building gypsum is prepared from the following components in percentage by mass according to the particle size of 45-80 μm: 80 μm to 145 μm = 40: 60, adding a solvent to the mixture; the mass ratio of the cement to the particle size is <15 mu m: 15-45 μm =60: 40; the particle size of the vitrified micro bubbles is 145-250 μm, the mass ratio of the vitrified micro bubbles according to the particle size is 145-180 μm: 180-250 μm =35: 65; the adhesive is re-dispersible emulsion powder of vinyl acetate-ethylene copolymer; the water-retaining agent is hydroxypropyl methyl cellulose ether; the water reducing agent is a sulfonated melamine water reducing agent; the retarder is prepared from citric acid and bone glue protein according to a mass ratio of 1: 2, mixing the components.
2. The interior thermal insulation gypsum for the external wall as claimed in claim 1, wherein the interior thermal insulation gypsum for the external wall comprises the following raw materials in parts by mass:
100 parts of building gypsum, 10 parts of cement, 50 parts of vitrified micro bubbles, 150 parts of water, 0.5 part of adhesive, 0.45 part of water-retaining agent, 0.7 part of water reducing agent, 0.2 part of retarder and 0.7 part of polymer fiber.
3. The interior thermal insulation gypsum of claim 1, wherein the polymer fiber is a polypropylene fiber having a diameter of 15 μm and a length of 3 mm.
4. The method for preparing the internal thermal insulation gypsum of the external wall according to any one of claims 1 to 3, wherein the lightweight high-strength internal thermal insulation gypsum of the external wall can be obtained by adding water to all raw materials according to the proportion and uniformly stirring.
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| CN110282945A (en) * | 2019-08-13 | 2019-09-27 | 吉林重通成飞新材料股份公司 | A kind of gypsum based composite, preparation method and plaster formulation part |
| CN110984436B (en) * | 2019-12-20 | 2022-05-24 | 江西奇信集团股份有限公司 | Partition board and preparation and installation method of building partition wall thereof |
| CN110981241B (en) * | 2019-12-27 | 2020-09-25 | 河南理工大学 | Modified reinforced gypsum material and preparation method thereof |
| CN111233414A (en) * | 2020-01-15 | 2020-06-05 | 重庆建大建筑材料有限公司 | Water-resistant light gypsum material and preparation method thereof |
| CN111039641A (en) * | 2020-01-15 | 2020-04-21 | 重庆建大建筑材料有限公司 | Low-shrinkage light gypsum material and preparation method thereof |
| CN111205055A (en) * | 2020-01-15 | 2020-05-29 | 重庆建大建筑材料有限公司 | Anti-flow on-hook spraying heat preservation gypsum for heat preservation in building outer wall |
| CN111233416A (en) * | 2020-01-15 | 2020-06-05 | 重庆建大建筑材料有限公司 | Anti-cracking gypsum-based light material |
| CN113354377A (en) * | 2021-05-25 | 2021-09-07 | 重庆大学 | Lightweight plastering gypsum prepared from mirabilite gypsum and preparation method thereof |
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| CN101691292A (en) * | 2009-09-30 | 2010-04-07 | 谢日清 | Lightweight wall plaster |
| US8070876B1 (en) * | 2011-05-05 | 2011-12-06 | Haihong Jiang | Fireproof insulating cementitious foam comprising phase change materials |
| CN106220115B (en) * | 2016-07-19 | 2018-07-20 | 北京建筑材料科学研究总院有限公司 | The gypsum based self-leveling mortar and preparation method thereof prepared using iron tailings fine sand |
| CN106800401B (en) * | 2017-01-13 | 2019-04-09 | 河北睿索固废工程技术研究院有限公司 | A kind of gypsum based self-leveling mortar using molybdic tailing as filler |
| CN108751900B (en) * | 2018-07-31 | 2020-12-08 | 苏州大乘环保新材有限公司 | High-performance reflective heat-insulation gypsum-based composite heat-insulation material and preparation method thereof |
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