MINERAL-BASED WALL PLASTER WITH CONTROLLED SURFACE CRYSTAL MORPHOLOGY FOR ENHANCED PROJECTION IMAGING PERFORMANCE.

Abstract

The invention relates to a mineral-based wall plaster (1) and its method of creation, for leveling raw building surfaces (2) and creating a functional surface for projection imaging purposes, and is based on the principle of differentiating the morphology of calcium sulfate dihydrate crystals (6) formed during the hydration of the calcium sulfate-based mineral binder phase (15) depending on their position by means of a crystal morphology arrangement system (7), creating an inner mechanical crystal region (4) and an outer optical crystal region (5) within the monolithic plaster body (3) formed in the same hydration and setting process, and the outer optical crystal region (5) differentiated via a crystal morphology gradient (8) to regulate the angular backscatter of the projection light by reducing its directional concentration without requiring a separate resin-based projection coating or projection film.

Description

1 TARIFF SURFACE CRYSTAL MORPHOLOGY CONTROLLED PROJECTION IMAGING PERFORMANCE ENHANCED MINERAL-BASED WALL PLASTER TECHNICAL AREA 5 The invention relates to the leveling and finishing of interior wall surfaces of buildings. It relates to mineral-based building plasters used for this purpose. The invention specifically refers to a calcium sulfate compound that can be applied as a leveling plaster to raw building surfaces. calcium containing essential mineral binders and formed during hydration and setting processes. The morphology of sulfate dihydrate crystals near the surface differs from the morphology of crystals in the inner region. By differentiating it from its morphology, it serves not only a mechanical plastering function but also a projection function. a mineral-based surface that creates a functional surface regulating the angular backscatter of light It relates to wall plaster and the method by which that wall plaster is applied. STATE OF THE ART Mineral-based plasters used on interior wall surfaces of buildings; brick, block, concrete, 15 Leveling of aerated concrete and similar raw building surfaces, correction of surface irregularities. removal and application of paint, coating or similar top coats widespread aim is to create a mechanically stable surface on which this can be achieved. It is used as follows: In calcium sulfate-based plasters, calcium sulfate is mixed with water. Hydration of hemihydrate results in the formation of calcium sulfate dihydrate crystals. 20 and the structure formed by these crystals with each other ensures the hardening and mechanical properties of the plaster. It ensures its integrity. In known applications of the technique, hydration of calcium sulfate-based materials and It is known that crystallization behaviors can be altered by using various additives. By controlling crystal growth, the size, geometry, length / width ratio of the crystals can be altered. Similar morphological characteristics can be modified; thus, the production, setting, and water requirements of the material can be adjusted. various properties such as processability, mechanical properties or filtration behavior It can be edited. In light of the information given in the paragraph above, the literature review conducted on the current state of the art... In the patent document numbered US2907667A encountered in the research, calcium sulfate 30 A method for arranging the crystal habit of crystals is described. The document mentions carboxyl functional acids such as succinic acid, citric acid, malic acid, and maleic acid. The way calcium sulfate crystals grow using the components or their salts 2 can be modified; also, surfactants together with crystal habit regulators. It is stated that it can be used in this way. Thus, the shape and size of calcium sulfate crystals can be altered. It has been observed that its properties can be modified to suit process needs. With this... In the document in question, the control of crystal morphology is primarily of calcium sulfate. It is aimed at regulating production and crystallization properties; 5 applied to the wall. the region near the outer surface of a monolithic plaster layer that is in contact with the air, from the inner region creating a different crystal microstructure and projection of this resulting microstructure a structure designed to regulate the angular backscatter of light It is not explained. On the other hand, in projection technology, 10 of the visible light coming from the projector Micro-projection surfaces are designed so that the projection light can be evenly distributed back to the viewer. Its structure or the arrangement of light-diffusing substances on its surface is also known. In light of the information given in the paragraph above, the literature review conducted on the current state of the art... In the patent document numbered US6144491A encountered in the research, a reflective type was described. The projection screen is explained, and the distribution characteristics of the projection light are described as follows: 15 a light-diffusing coating containing fine crystalline mineral particles for the purpose of regulation The solution utilizes a carrier layer for distribution of the projection light. a special light-diffusing coating is created on the surface and within this coating This is achieved through the optical behavior of particles. Therefore, projection. The structure that provides its performance is formed from the mineral crystallization of the carrier surface itself. 20 It is not an incoming surface, but a functional coating created separately for projection purposes. It is a layer. Similarly, in known projection surfaces, within resin-based binders dispersed mineral or polymer particles, glass or mineral microspheres, differential refraction Using light-scattering particles with indices and surface roughening methods, 25 The projection light can be distributed at specific angles. This is fundamental in such structures. The approach will provide a separate projection function onto a pre-existing carrier surface. This involves the application of an optical layer, a paint layer, or a coating containing particles. Solutions for converting wall surfaces directly into projection surfaces are also included. It is known. For example, in patent document number CN103242688A, projection 30 a material that can be applied to a surface where an image will be created and that reflects / scatters light a projection screen paint containing glass beads to improve its properties This is explained. Thanks to this solution, a separate classic projection screen can be used without It becomes possible to use an existing surface as a projection display surface. is brought. However, in this technical approach, the projection function, structure 35 3 not from the crystal structure of the mineral plaster that forms the surface, but from the existing surface special projection paint applied to it and the optical functions within this paint It is obtained from the components. Therefore, in the known technique, on the one hand, the chemical morphology of calcium sulfate crystals is determined. It can be modified with the help of additives, on the other hand, the angular direction of light on projection surfaces is 5 its distribution surface microstructure, mineral particles, microspheres or special coating It appears that it can be organized through layers. However, the technique in question... These approaches were developed for independent purposes. In known calcium sulfate systems, the arrangement of crystal morphology is predominantly based on... while aimed at modifying production, hydration, setting, processability or mechanical properties; 10 In known projection surfaces, the optical function is mostly added to the carrier surface afterwards. This is provided by a separate optical layer containing paint, resin, film, or particles. In conclusion, in the known technique, a normal leveling plaster is applied to the raw building surface. A single, applicable mineral-based plaster mass performs the function of mechanical plastering, During the same hydration and setting process, 15 near the outer surface of the plaster that comes into contact with air differentiating the mineral crystal structure in the region from the crystal structure in the interior region and The resulting surface crystalline microstructure is a separate projection film, resin-based. projection without requiring a projection coating or foreign optical particle layer the need to use it in regulating the angular backscatter of light continues It is seen. 20 THE PURPOSE OF THE INVENTION The primary purpose of the invention is to create a surface that can be applied to raw building surfaces in the form of a normal leveling plaster. a single mineral-based plaster structure, while maintaining the mechanical plaster function, The purpose of projection is to create a functional external surface for display purposes. The purpose of the invention is to provide a projection display function by applying a separate 25-inch screen to the plaster surface afterwards. projection paint, resin-based optical coating, projection film, or light-diffusing foreign object not through a surface layer, but through the controlled utilization of the plaster's own mineral crystal structure. The aim is to ensure that it is obtained through differentiation. Another objective of the invention is to improve the hydration and setting process of calcium sulfate-based mineral plaster. Only the hardening of the plaster and mechanical properties result from the crystallization event that occurred. 30 not only to ensure integrity, but also to provide surface coverage for the projection light. 4 with the aim of creating a functional microstructure that regulates its behavior It is to benefit from. Another aim of the invention is to produce a single plaster mixture through a single application and setting process. microstructural zones with different technical functions within the same monolithic plaster body to create; within this scope, the mechanical integrity of the plaster, its adhesion to the surface and 5 with a projection light and an internal mechanical crystal region that primarily provides the leveling function. The goal is to create an interacting external optical crystal region. Another purpose of the invention is to protect the area near the outer surface of the plaster that comes into contact with the air. The average size, length / width ratio of the resulting calcium sulfate dihydrate crystals, at least 10 of the properties of geometry, surface density, distribution and / or orientation of crystal surfaces The aim is to differentiate one of them from the crystals that occur in the interior region of the plaster. Another purpose of the invention is to separately apply the differentiation in crystal morphology. without the need to create layers of material, the same plaster mixture The formation and, if necessary, internalization of the hydration and setting process depending on the location. a crystal morphology that changes from the mechanical crystal region to the outer optical crystal region 15 The goal is to create a gradient. Another aim of the invention is to investigate differential crystal growth occurring at the plaster-water-air interface. By taking advantage of these conditions, the crystal morphology arrangement system is applied to the outer surface of the plaster. This allows the surface to exhibit a selective effect in the immediate area, thus ensuring the same level of plaster distribution throughout the entire volume. Instead of creating the microstructure, 20 near the outer surface where the optical function is needed. The aim is to create a different crystalline microstructure in the region. One of the aims of the invention is to create mineral crystal microstructures in the outer optical crystal region. by causing the visible light from the projector to become excessively concentrated in a particular direction and reduces the tendency for local glare or hot-spot formation on the surface, making the projection light more efficient. The goal is to ensure a controlled angular backscatter. 25 Another aim of the invention is to create a macroscopic image that will not distort the geometry of the projected image. While maintaining a level and smooth wall surface, the angular aspect of light at the microscopic scale... The goal is to create a functional surface with a crystal geometry that influences its distribution. Another purpose of the invention is to level the building surface and create projection images. In terms of creating a functional surface, it is not a series of separate applications that follow each other. 30 by removing, applying a single mineral plaster and within the same hydration / setting process to accomplish. The ultimate goal of the invention is to mechanically and mechanically induce the crystallization mechanism of mineral-based plaster. both in the creation of the plaster structure and in the angular backscatter of the projection light. By using them together in the creation of a regulating surface microstructure, an additional optical surface is created. mechanical and optical functions within the same monolithic plaster structure without the need for a layer. The goal is to provide a wall plaster with enhanced projection display performance that brings them together. 5 The structural and characteristic features and all the advantages of the invention are given in the figures below. Thanks to the detailed explanation written with references to the figures, it becomes clearer. This will be understood, and therefore the evaluation will also take these forms and detailed explanations into account. It must be done by taking it. BRIEF DESCRIPTION OF THE FIGURES The best way to utilize the advantages of the existing invention, together with its structure and additional elements. For it to be understood, it must be considered together with the figures explained below. Figure 1: Perspective view of mineral-based wall plaster applied to the raw building surface. It is the appearance. Figure 2: Internal mechanical components of mineral-based wall plaster located within the monolithic plaster body. This is a cross-sectional view showing the crystalline region and the outer optical crystalline region. Figure 3: Calcium sulfate dihydrate crystals in the inner mechanical crystal region and outer optical crystal. Comparative schematic of differentiated calcium sulfate dihydrate crystals in the region 20 It is the appearance. Figure 4: The projection beam from the projector hitting the calcium deposit on the outer surface of the plaster. Schematic showing the backdistribution at different angles by interacting with sulfate dihydrate crystals. It is the appearance. Figure 5: From the inner mechanical crystal region to the outer optical crystal region of the monolithic plaster body 25 the crystal morphology gradient and crystal morphology transition region that occurs correctly This is a schematic cross-sectional view illustrating the situation. Figure 6: Application, leveling, and finishing of mineral-based wall plaster to the raw building surface. the application stages related to the formation of the external optical crystal region during the prism process This is a schematic view showing the diagram. 30 6 REFERENCE NUMBERS 1. Mineral-based wall plaster 2. Raw building surface 3. Monolithic plaster body 5 4. Internal mechanical crystal region 5. Outer optical crystal region 6. Calcium sulfate dihydrate crystals 7. Crystal morphology arrangement system 8. Crystal morphology gradient 10 9. Plaster exterior surface 10. Projector 11. Incident projection beam 12. Backscattered projection beam 13. Crystal morphology transition zone 15 14. Mineral filler phase 15. Calcium sulfate-based mineral binder phase The drawings do not necessarily need to be scaled and are necessary for understanding the invention. Details that are not present may have been overlooked. Furthermore, at least to a large extent, 20 Elements that are identical or at least have substantially identical functions are numbered the same. It is shown. DETAILED DESCRIPTION OF THE INVENTION The invention enables the leveling of raw building surfaces by applying it to those surfaces. 25 providing and also creating a functional surface in terms of projection display. It is related to the mineral-based wall plaster (1) that brings. The subject of the invention is mineral-based wall plaster (1); brick, block, concrete, reinforced concrete, aerated concrete, can be applied to raw building surfaces (2) such as betopan, mineral-based boards and similar It is structured in this way. The basic feature of mineral-based wall plaster (1) is that the building surface is 30 projection by leveling and creating a mechanically stable surface The functions of regulating the redistribution of light on the surface are all within the same plaster structure. It is the act of bringing together. 7 The structure of plaster The subject of the invention is a mineral-based wall plaster (1), which is raw when the application and setting process is completed. It forms a monolithic plaster body (3) on the building surface (2). Monolithic plaster The body (3) consists of different layers of material applied independently of each other. It does not form; it is formed as a result of the hydration and setting process of a single plaster mixture. 5 It is coming. The main binder system of the monolithic plaster body (3) is a calcium sulfate based mineral binder. phase (15) is formed. Calcium sulfate based mineral binder phase (15) preferably consists of calcium It contains calcium sulfate hemihydrate. The hydration of this calcium sulfate hemihydrate with water... As a result, calcium sulfate dihydrate crystals (6) are formed. 10 Calcium sulfate dihydrate crystals (6) interact with each other and develop into monolithic plaster. It ensures the formation of the solid mineral structure of the body (3). Thus, the word The subject crystals (6) contribute to the mechanical integrity of the plaster on the one hand, and on the other hand Within the scope of the invention, it is used in the interaction of the plaster exterior surface (9) with the projection light. Mineral-based wall plaster (1) may also contain mineral filler phase (14). Mineral filler 15 phase (14), in the regulation of the mechanical, rheological and application properties of the plaster It is used. The plaster that is the subject of the invention also contains at least one crystal morphology arrangement system (7). Crystal morphology arrangement system (7), calcium sulfate based mineral binder phase (15) Growth of calcium sulfate dihydrate crystals (6) formed during hydration 20 It is structured in a way that can influence its behavior and at least one morphological feature. Crystal morphology arrangement system (7); carboxyl functional organic compounds, their salts, compounds containing multiple carboxyl groups, surfactants, crystals fine mineral particles or their suitable nucleation that regulate their formation It may include at least one of the following combinations. 25 The component that regulates crystal growth in preferred applications is succinic acid or succinate-based components, citric acid or citrate-based components, malic acid or its salts, Maleic acid or its salts, and suitable combinations thereof, can be selected. However... The invention is not limited to the use of a specific crystal morphology-modifying chemical compound. The key to the invention is the arrangement system of crystal morphology (7) monolithic plaster 30 not necessarily that it produces the same crystal morphology throughout its (3) body, 8 The crystal morphology in the region near the outer surface of the plaster (9) differs from the crystal morphology in the inner region. It allows for differentiation. Internal mechanical crystal region and external optical crystal region As schematically shown in Figure 2, the monolithic structure has completed the hydration and setting process. functionally differentiated internal mechanical crystal regions (4) within the plaster body (3) 5 and the outer optical crystal region (5) is formed. Internal mechanical crystalline region (4), towards the raw building surface (2) of the monolithic plaster body (3). It is located in the interior part and the mechanical integrity of the plaster is preserved, the raw structure adhesion to the surface, ensuring surface leveling, and the resulting plaster geometry It primarily performs protection functions. 10 The outer optical crystal region (5) is the outer plaster body (3) of the monolithic plaster body that is in contact with the air. It occurs in the part near the surface (9). The outer optical crystal region in question (5), regulating the interaction of visible light from the projector with the plaster outer surface (9) It contains a crystalline microstructure. The inner mechanical crystal region (4) and the outer optical crystal region (5) are two different plaster compositions superimposed on each other. They are not independent layers formed by the application. Both regions contain the same mineral. the essential wall plaster (1), within the same monolithic plaster body (3) and with the same hydration and It occurs during the plugging process. This structure is one of the key technical features of the invention. Thus, the projection function is achieved. For this purpose, a resin-based projection coating is also applied to the hardened plaster, 20 The plaster itself can be used without the need for a projection film or a separate optical layer. A functional outer surface is created from the mineral crystal structure. Position-dependent differentiation of crystal morphology. As schematically shown in Figure 3, calcium is located in the internal mechanical crystal region (4). calcium sulfate dihydrate 25 located in the outer optical crystal region (5) with sulfate dihydrate crystals (6). There is at least one morphological difference between the crystals (6). This difference refers to the average size, average length, and average width of the crystals. aspect ratio, crystal geometry, surface density, distribution of exposed crystal faces, orientation of crystal tips, crystal orientation distribution and / or the micro-levels they create It may occur in terms of at least one of the roughness characteristics. 30 9 The difference in crystal morphology is of the same magnitude throughout the entire outer optical crystal region (5). It is not necessary. In one application of the invention, the interior of the monolithic plaster body (3) As one approaches the outer surface of the plaster (9), at least one morphological feature of the crystals is observed. It changes gradually. This gradual change creates the crystal morphology gradient (8). 5 As shown in Figure 5, between the inner mechanical crystal region (4) and the outer optical crystal region (5) The transition region of crystal morphology (13) can be found. In the transition region of crystal morphology (13), At least one morphological feature of calcium sulfate dihydrate crystals (6) is in the internal mechanical crystal region. (4) changes from the structure found in the outer optical crystal region to the structure found in (5). Therefore, there must be a sharp 10 between the inner mechanical crystal region (4) and the outer optical crystal region (5). And there doesn't need to be a physical layer boundary. These areas are composed of the same monolithic mineral. They can occur as crystalline microstructures that vary depending on their position within the structure. Formation of surface-selective crystallization When mineral-based wall plaster (1) is mixed with water and applied to the raw building surface (2), A plaster-water-air interface is formed on the outside of the monolithic plaster body (3). 15 The amount of water at the interface, moisture loss, evaporation conditions, and the surface of the components are all factors to consider. activity they exhibit in the immediate region, crystal nucleation conditions, and crystal morphology Interaction of the regulation system (7) with the surface, crystalline region near the plaster outer surface (9) This contributes to the differentiation of the growth environment from the environment inside the plaster. As a result of these different crystal growth conditions, from the same plaster mixture and the same hydration 20 Although it is formed from the reaction of calcium sulfate in the outer optical crystal region (5) dihydrate crystals (6) have at least one morphological feature from crystals in the internal mechanical crystal region (4). They differ in terms of... Crystal morphology arrangement system (7) with the same concentration throughout the plaster volume Even if present, local hydration, moisture, and evaporation due to the plaster-water-air interface are 25%. and the effects of differences in surface interaction conditions on the crystal growth of the system Results may vary depending on location. In alternative applications, at least one component of the crystal morphology arrangement system (7) is plaster- It can be selected to exhibit different activity or distribution in the region near the water-air interface. In this way, different crystal growth conditions are created in the near-surface region, allowing for the development of external optical crystals. the region (5) occurring as part of the same monolithic plaster body (3) is provided. Preparation and application of plaster. The subject of the invention, mineral-based wall plaster (1), can preferably be prepared as a dry mix. 5 The dry mixture will form the calcium sulfate-based mineral binder phase (15). binder, mineral filler phase (14), crystal morphology arrangement system (7), prism regulators, water-retaining components, rheological modifiers, and other necessary construction chemicals It may include auxiliary components. During application, the appropriate amount of water is added to the dry mixture until it reaches a usable consistency. 10 The plaster mixture is prepared. The prepared plaster mixture is applied to the raw building surface (2) as shown in Figure 6. The application is carried out using hand tools or with the help of a suitable plastering machine. realizable. The applied plaster is leveled and / or the surface smoothed using appropriate leveling tools. 15 Thus, the outer surface of the plaster (9) provides the macroscopic geometry of the projection image. It is leveled in such a way as not to create irregularities on a scale that would disrupt the surface. In the preferred application of the invention, the final finishing process takes place after the plaster has completely hardened. first and within a time interval that will allow the crystalline microstructure on the surface to develop This is done. In this way, the macroscopic smoothness of the outer surface of the plaster (9) is ensured while the outer 20 complete crushing of the microscopic crystal structure that will be formed by the optical crystal region (5) or The closure can be prevented. The appropriate finishing time depends on the properties of the calcium sulfate-based binder used, and the water / binder ratio. the ratio, ambient temperature, ambient humidity, plaster thickness, and crystal morphology arrangement can be determined according to the (7) characteristics of the system. 25 In an alternative application, during or after the final finishing, the plaster surface (9) A controlled amount of water or a water-based crystallization activation solution may be applied. In practice, the activation fluid is used to create a separate optical coating. not used to regulate crystallization conditions occurring in the region near the outer surface. It is used for this purpose. 30 Working principle and formation of the optical effect. 11 The working principle of the mineral-based wall plaster (1) which is the subject of the invention is the monolithic plaster body. (3) the crystal microstructure created in the outer optical crystal region (5) with projection light It is based on interaction. As shown in Figure 4, the incident projection beam (11) coming from the projector (10), It reaches the outer surface of the plaster (9). 5 The incident projection beam (11) is located in the outer optical crystal region (5) of calcium sulfate dihydrate. the surfaces of their crystals (6) and the microscopic surface geometry they form They interact. All surfaces of the crystals located in the outer optical crystal region (5) have a single common not being in alignment and the crystal geometry creating controlled different orientations 10 As a result of bringing it, at least a part of the incoming projection ray (11) is reflected back in different directions. They are directed in the form of distributed projection rays (12). This reduces the tendency of the projection light to concentrate excessively in a single direction. Local glare or hot-spot formation can be limited, and the projection image can be improved. Its visibility in different viewing directions can be adjusted. 15 The aim of this invention is to determine the total amount of light necessarily reflected from the plaster surface. It is not an increase. The main technical effect is the incoming projection light (11) on the plaster outer surface (9) angular backscatter characteristic of the mineral produced in the outer optical crystal region (5) It is the arrangement of crystals through microstructures. Therefore, the plaster exterior surface (9) meets different technical requirements at two different scales. 20 On a macroscopic scale, the surface can preserve the geometry of the projection image. While kept level and smooth, calcium in the outer optical crystal region (5) at the microscopic scale sulfate dihydrate crystals (6) form a microsurface that affects the scattering of light. It brings. The optical microsurface in question is a 25 that was subsequently added onto the monolithic plaster body (3). It is not a foreign projection layer. The optical function also involves the hardening of the plaster. differentiation of the mineral crystallization mechanism in the region near the outer surface It is obtained as a result. Thus, the internal mechanical crystal region (4) is predominantly located within the same monolithic plaster body (3). While performing the structural and mechanical plaster function, the external optical crystal region (5) projection 30 It performs the optical function of regulating the angular dispersion of light. 12 As a result, the leveling of the raw building surface (2) is mechanical thanks to the invention. Creating a stable plaster surface and being functional in terms of projection display. Creation of crystalline microsurfaces; separate plaster, optical paint and projection coating. without the need for applications, the application of a single mineral-based wall plaster (1) and This can be achieved within the same hydration / priming process. 5 The scope of protection in this application is defined in the claims section and is explicitly stated above. The examples given cannot be limited to those that a technically skilled person demonstrates in the invention. the innovation introduced can be created by using similar structures and / or this It is clear that the structure can be applied to other areas with similar purposes using the relevant technique. 10 Therefore, such structures foster innovation and, in particular, surpass the known state of technology. It is also obvious that it will lack this criterion.

Claims

13 REQUESTS 1. The invention is for leveling raw building surfaces (2) and projection imaging purposes. a calcium sulfate-based mineral used to create a usable surface binder phase (15) and the hydration of the mineral binder phase in question crystal morphology regulating the morphology of the resulting calcium sulfate dihydrate crystals (6) 5 It is a mineral-based wall plaster (1) containing a regulation system (7), and its feature is; • formed from a single plaster mixture as a result of the same hydration and setting process, internal mechanical crystal region (4) located towards the raw building surface (2) and plaster exterior containing the outer optical crystal region (5) which is positioned towards its surface (9) monolithic plaster body (3), 10 • average of calcium sulfate dihydrate crystals (6) located in the outer optical crystal region (5) from its size, length / width ratio, geometry, surface density and / or orientation distribution calcium sulfate dihydrate, found in the inner mechanical crystal region (4), of a few of them. The outer optical crystal region (5) is different from the crystals (6), • Calcium sulfate 15 from the inner mechanical crystal region (4) to the outer optical crystal region (5) at least one morphological feature of dihydrate crystals (6) depending on location the crystal morphology gradient that occurs with the change (8), • the external optical crystal region (5) mentioned is also placed on the monolithic plaster body (3) without the application of a resin-based projection coating or projection film, 20 through the microsurface formed by calcium sulfate dihydrate crystals (6) by reducing the directional concentration of the projection light, it reduces angular backscatter. arrangement, It is characterized by...

2. A mineral-based wall plaster (1) conforming to Claim 1, whose characteristic is; internal mechanical crystal. from crystal morphology in region (4) to crystal morphology in external optical crystal region (5) 25 It is characterized by containing a transition region (13) in crystal morphology to provide a gradual transition. is being done.

3. A mineral-based wall plaster (1) conforming to Claim 1, whose characteristic is; calcium sulfate dihydrate crystal morphology regulation system to regulate the growth form of crystals (6) (7) characterized by containing at least one carboxyl functional crystal growth regulator component 30 is being done.

4. A mineral-based wall plaster (1) conforming to Claim 3, whose characteristic is; calcium sulfate dihydrate. Succinic crystal growth regulator component to regulate the morphology of crystals (6) 14 acid or its salt, citric acid or its salt, malic acid or its salt, maleic acid or its salt and theirs It is characterized by containing at least one of these combinations.

5. A mineral-based wall plaster (1) that conforms to any of the previous requirements, and whose characteristic is; Internal mechanical conditions of crystal growth in the outer surface region near the plaster-water-air interface Crystal growth regulator 5 to contribute to differentiation according to the crystal region (4) It is characterized by containing at least one surfactant used in conjunction with the component.

6. A mineral-based wall plaster (1) that conforms to any of the previous requirements, and whose characteristic is; macroscopic surface smoothness that will not distort the geometry of the projection image while providing external support to regulate the backscatter of projection light at a microscopic scale. plaster exterior 10 formed by calcium sulfate dihydrate crystals (6) in the optical crystal region (5). It is characterized by containing the surface (9).

7. A mineral-based wall plaster (1) that conforms to any of the previous requirements, and whose characteristic is; external optical crystal to reduce the concentration of projection light in a single direction calcium sulfate dihydrate crystals with different surface orientations in the region (5) (6) It is characterized by its inclusion. 15 8. A mineral-based wall plaster (1) that conforms to any of the previous requirements, and whose characteristic is; Calcium to contribute to the regulation of the mechanical and rheological properties of the plaster. mineral filler phase (14) dispersed within sulfate-based mineral binder phase (15) It is characterized by its inclusion.

9. The invention creates a surface that can be used for projection display purposes. It is a method for creating mineral-based wall plaster (1), and its characteristic is; • with the binder that forms the calcium sulfate-based mineral binder phase (15) Crystal morphology affecting the morphology of calcium sulfate dihydrate crystals (6) (7) Preparation of a single plaster mixture by mixing with water, • The prepared plaster mixture is applied to the raw building surface (2) to form a monolithic plaster 25 the formation of the body (3), • macroscopically preserving the geometry of the projection image of the applied plaster leveling to ensure surface smoothness, • during the hydration and setting process of the monolithic plaster body (3), to the plaster-water-air interface crystal growth conditions in the immediate region and crystal morphology regulation 30 By utilizing the system (7), calcium that occurs in the region near the outer surface average size, length / width ratio, geometry, surface of sulfate dihydrate crystals (6) at least one of the density and / or orientation distribution occurring in the interior region internal mechanical crystal differentiation from calcium sulfate dihydrate crystals (6) Formation of region (4) and external optical crystal region (5), • calcium sulfate from the inner mechanical crystal region (4) to the outer optical crystal region (5) at least one morphological feature of dihydrate crystals (6) depending on location by changing the crystal morphology gradient (8) and 5 • formation of calcium sulfate dihydrate crystals (6) in the outer optical crystal region (5) the micro-surface it brings, also resin-based projection coating or projection By reducing the directional concentration of the projection light without applying film, angular regression Completing the socket process in a way that will regulate the distribution, It is characterized by including stages. 10 10. A method that conforms to claim 9, and its characteristic is that the inner mechanical crystal region (4) is the outer optical crystal. To ensure the gradual change of crystal morphology towards region (5), the crystal Its morphology is characterized by the inclusion of the stage of formation of the transition zone (13). is being done.

11. A method that conforms to claim 9 or 10, and its characteristic is; macroscopic 15 of the outer surface of the plaster (9). while ensuring its uniformity, the complete crushing of the developing crystalline microstructure or to prevent sealing before the plaster has completely hardened and the surface crystalline performing the finishing process within the time interval that allows the structure to develop It is characterized by including this stage.

12. A method that conforms to either of claims 9-11, and whose characteristic is that the outer optical crystal region is 20 (5) will not form a separate optical layer to regulate the crystallization conditions a quantity of water or water-based crystallization activation liquid to the outer surface of the plaster (9) It is characterized by including the implementation phase.

13. A method that conforms to either of claims 9-12, and whose characteristic is that it is located in the external optical crystal region. (5) to ensure the arrangement of the morphology of calcium sulfate dihydrate crystals (6) 25 In the crystal morphology arrangement system (7) succinic acid or its salt, citric acid or its salt, malic acid or its salt, maleic acid or its salt, and at least one of the combinations thereof It is characterized by including the usage phase.

14. A method that conforms to any of claims 9-13, and its characteristic is that it is in the external optical crystal region (5) to contribute to the creation of different crystal growth conditions crystal 30 In the morphology regulation system, at least one crystal growth regulatory component (7) It is characterized by including the step of applying the surfactant.

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