Colored stone powder mixture and preparation method thereof

Abstract

The invention discloses a colored stone powder mixture and a preparation method thereof. The colored stone powder mixture comprises 30-50 parts by mass of sand, 15-25 parts by mass of cement, 5-10 parts by mass of ash calcium, 5-10 parts by mass of white lime, 5-10 parts by mass of glue and 0.1-5 parts by mass of natural pigment. The particle size of the sand is 0.1 to 1.5 mm; the fineness of the cement, the ash calcium and the white lime is less than 80 meshes; the fineness of the natural pigment is 800 to 1200 meshes. The problem that an existing natural stone powder product is single in color and cannot meet diversified decoration requirements is solved.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a colored stone powder mixture and a preparation method thereof. Background Art

[0002] In building decoration projects, wall and floor decoration materials play a key role in the beauty, functionality and durability of buildings. Traditional decoration materials such as wallpaper, latex paint, and ceramic tiles have many limitations. Wallpaper has poor durability and is easily affected by moisture, mold, and fading; latex paint has insufficient scrub resistance and weather resistance, and some contain harmful volatile substances; ceramic tiles are complex to construct, costly, and have the risk of falling off.

[0003] As a new type of decorative material, natural stone powder has the advantages of environmental protection, fire resistance, and water resistance. However, the existing natural stone powder products are single in color, mainly white or gray, and cannot meet the diverse decorative needs. Therefore, it is of great practical significance to develop a colored natural stone powder that can maintain the excellent performance of natural stone powder and have a rich color selection. Summary of the invention

[0004] In order to overcome the defects of the prior art, a colored stone powder mixture and a preparation method thereof are provided to solve the problem that the existing natural stone powder products have a single color and cannot meet the diverse decoration needs.

[0005] To achieve the above object, a colored stone powder mixture is provided, comprising 30 to 50 parts by mass of sand, 15 to 25 parts by mass of cement, 5 to 10 parts by mass of lime, 5 to 10 parts by mass of white lime, 5 to 10 parts by mass of glue and 0.1 to 5 parts by mass of natural pigment;

[0006] The particle size of the sand is 0.1 to 1.5 mm;

[0007] The fineness of the cement, lime and white lime is less than 80 mesh;

[0008] The fineness of the natural pigment is 800-1200 meshes.

[0009] Furthermore, the cement is silicate cement.

[0010] Furthermore, the glue is silicone glue or PVA glue.

[0011] Furthermore, the natural pigment is red iron oxide, yellow iron oxide, or ultramarine blue.

[0012] The present invention provides a method for preparing a colored stone powder mixture, comprising the following steps:

[0013] Mix sand, cement, lime, lime and glue and stir at low speed to mix evenly to form a base material;

[0014] The natural pigment is added into the base material and mixed with stirring at high speed to form a colored stone powder mixture.

[0015] The beneficial effect of the present invention is that the colored stone powder mixture of the present invention, by reasonably selecting and optimizing the raw material composition and combining it with a specific preparation process, has excellent physical properties and rich color presentation while maintaining environmental protection characteristics, so as to meet the demand of the building decoration market for beautiful and high-performance decorative materials.

[0016] The color of the colored stone powder mixture of the present invention is rich and durable. The colored stone powder mixture of the present invention can prepare natural stone powder of various colors, such as red, yellow, blue, green, etc., by adding natural pigments, so as to meet the needs of different architectural decoration styles. In addition, the natural pigments have good weather resistance and chemical stability, are not easy to fade, and make the decorative effect of the colored natural stone powder durable.

[0017] The colored stone powder mixture of the present invention has excellent physical properties. The sand as aggregate provides good skeleton support, interacts with silicate cement (PO), lime, white lime and glue to form a solid structure, so that the colored natural stone powder has high strength and hardness. According to tests, its compressive strength can reach 30-50MPa, and its flexural strength can reach 6-10MPa, which is better than traditional decorative materials.

[0018] The colored stone powder mixture of the present invention has good water resistance and moisture resistance, is not easy to deform or mold in a humid environment, has a strength loss rate of less than 10% after being soaked in water for 72 hours, and has excellent water resistance.

[0019] The fire resistance of the colored stone powder mixture of the present invention reaches the Class A non-combustible standard, and can effectively improve the fire safety of buildings.

[0020] The colored stone powder mixture of the present invention is environmentally friendly and non-toxic. The raw materials of the colored stone powder mixture of the present invention do not contain harmful chemicals, such as volatile organic compounds (VOCs) such as formaldehyde and benzene, and are harmless to the environment and human health during production and use, meeting environmental protection requirements.

[0021] The colored stone powder mixture of the present invention has good construction performance. The colored stone powder mixture of the present invention has good plasticity and adhesion. During construction, it can be applied by spraying, scraping, rolling and other methods. The construction is convenient and fast, and can adapt to different construction processes and base conditions. The surface after construction is flat and smooth, with a fine texture, and can be ground, polished and other treatments as needed to obtain different decorative effects. DETAILED DESCRIPTION

[0022] The present application is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention.

[0023] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below in conjunction with the embodiments.

[0024] The invention provides a colored stone powder mixture, comprising 30-50 parts by weight of sand, 15-25 parts by weight of cement, 5-10 parts by weight of lime, 5-10 parts by weight of white lime, 5-10 parts by weight of glue and 0.1-5 parts by weight of natural pigment.

[0025] The particle size of sand is 0.1-1.5 mm. The fineness of cement, lime and lime is less than 80 mesh. The fineness of natural pigment is 800-1200 mesh.

[0026] As a preferred embodiment, the cement is silicate cement.

[0027] As a preferred implementation, the glue is silicone glue or PVA glue.

[0028] As a preferred embodiment, the natural pigment is red iron oxide, yellow iron oxide, or ultramarine blue.

[0029] The present invention provides a method for preparing a colored stone powder mixture, comprising the following steps:

[0030] S1. Mix sand, cement, lime, lime and glue and stir at a low speed to form a base material.

[0031] First, the raw materials are pretreated.

[0032] Sand processing:

[0033] Select high-quality sand with a particle size of 0.1 to 1.5 mm, place it in a drying device, and dry it at 100 to 150°C until the moisture content is less than 2%. After drying, screen it to remove impurities and particles that do not meet the particle size requirements to ensure the purity and uniformity of the sand.

[0034] Treatment of Portland Cement (PO), Lime and White Lime:

[0035] Pass them through 80-120 mesh sieves respectively to remove impurities and ensure the fineness and uniformity of the raw materials, which is conducive to the full reaction of the raw materials in the subsequent mixing process.

[0036] Processing of natural pigments:

[0037] Choose appropriate natural pigments according to the required color, such as red iron oxide, yellow iron oxide, ultramarine blue, etc.

[0038] Grind the natural pigments to a fineness of 800-1200 mesh to ensure that the pigments can be evenly dispersed in the stone powder system, making the colors bright and uniform.

[0039] Add the pre-treated sand, silicate cement (PO), lime, lime and glue according to the above weight into a forced mixer. Stir at a low speed (100-200 rpm) for 5-10 minutes to make the raw materials preliminarily mixed and uniform, and avoid the loss and environmental pollution caused by the flying of raw materials.

[0040] S2. Add natural pigment into the base material and stir at high speed to form a colored stone powder mixture.

[0041] Add the ground natural pigment and continue stirring at a low speed for 3 to 5 minutes to disperse the pigment initially. Increase the stirring speed to medium speed (300 to 500 rpm) and stir for 15 to 20 minutes to ensure that all raw materials are fully mixed and the pigment is evenly dispersed in the stone powder to obtain a colored natural stone powder mixture.

[0042] The colored stone powder mixture of the present invention has excellent physical properties and rich color presentation by reasonably selecting and optimizing the raw material composition and combining a specific preparation process, while maintaining environmental protection characteristics, so as to meet the demand of the building decoration market for beautiful and high-performance decorative materials.

[0043] The color of the colored stone powder mixture of the present invention is rich and durable. The colored stone powder mixture of the present invention can prepare natural stone powder of various colors, such as red, yellow, blue, green, etc., by adding natural pigments, so as to meet the needs of different architectural decoration styles. In addition, the natural pigments have good weather resistance and chemical stability, are not easy to fade, and make the decorative effect of the colored natural stone powder durable.

[0044] The colored stone powder mixture of the present invention has excellent physical properties. The sand as aggregate provides good skeleton support, interacts with silicate cement (PO), lime, white lime and glue to form a solid structure, so that the colored natural stone powder has high strength and hardness. According to tests, its compressive strength can reach 30-50MPa, and its flexural strength can reach 6-10MPa, which is better than traditional decorative materials.

[0045] The colored stone powder mixture of the present invention has good water resistance and moisture resistance, is not easy to deform or mold in a humid environment, has a strength loss rate of less than 10% after being soaked in water for 72 hours, and has excellent water resistance.

[0046] The fire resistance of the colored stone powder mixture of the present invention reaches the Class A non-combustible standard, and can effectively improve the fire safety of buildings.

[0047] The colored stone powder mixture of the present invention is environmentally friendly and non-toxic. The raw materials of the colored stone powder mixture of the present invention do not contain harmful chemicals, such as volatile organic compounds (VOCs) such as formaldehyde and benzene, and are harmless to the environment and human health during production and use, meeting environmental protection requirements.

[0048] The colored stone powder mixture of the present invention has good construction performance. The colored stone powder mixture of the present invention has good plasticity and adhesion. During construction, it can be applied by spraying, scraping, rolling and other methods. The construction is convenient and fast, and can adapt to different construction processes and base conditions. The surface after construction is flat and smooth, with a fine texture, and can be ground, polished and other treatments as needed to obtain different decorative effects.

[0049] The colored stone powder mixture of the present invention can be widely used in the field of building decoration, such as the decoration of indoor and outdoor walls, floors, and ceilings, as well as the production of sculptures, handicrafts, etc., and is particularly suitable for places with high environmental protection requirements and unique decorative effects, such as residences, schools, hospitals, shopping malls, museums, etc.

[0050] In order to further illustrate the performance of the colored stone powder mixture of the present invention, the following embodiments are given in detail.

[0051] Example 1

[0052] 1. Raw material preparation

[0053] Sand (without water): Select river sand with a particle size between 0.5 and 1.2 mm, and the water content after drying is 1.5%, and weigh 40 parts by mass.

[0054] Portland cement (PO): pass through a 100-mesh sieve to remove impurities and weigh 20 parts by mass.

[0055] Lime lime: pass through a 100-mesh sieve and weigh 8 parts by mass.

[0056] White lime: Pass through a 100-mesh sieve and weigh 7 parts by mass.

[0057] Glue: Use environmentally friendly water-based glue and weigh 8 parts by weight.

[0058] Natural pigment: Use red iron oxide pigment, grind it to a fineness of 1000 mesh, and weigh 2 portions.

[0059] 2. Mixing and stirring

[0060] Add sand, silicate cement (PO), lime, white lime and glue into a forced mixer and mix at a low speed of 150 rpm for 8 minutes.

[0061] Add red iron oxide pigment and continue stirring at 150 rpm for 5 minutes. Increase the stirring speed to 400 rpm and stir for 18 minutes to obtain a red colored stone powder mixture.

[0062] 3. Construction of colored stone powder mixture

[0063] 3-1. Wall construction process

[0064] Clean the base layer → Apply anti-alkali primer → Apply 8mm thick natural stone powder base coarse aggregate for leveling → Paste medium-alkali glass fiber mesh cloth at the junction of different materials → Level 2mm thick natural stone powder base coarse aggregate → Apply the first coat of colored stone powder mixture (0.8mm) → Apply the second coat of colored stone powder mixture (0.7mm) → Polish with sandpaper → Apply the surface layer of colored stone powder mixture (0.5mm) → Finish.

[0065] 3-2. Ceiling construction process

[0066] Clean the base layer → Apply anti-alkali primer → Apply natural stone powder base coarse aggregate to level the surface → Apply the first coat of colored stone powder mixture (0.8mm) → Apply the second coat of colored stone powder mixture (0.7mm) → Polish with sandpaper → Apply the surface layer of colored stone powder mixture (0.5mm) → Finish.

[0067] Construction points

[0068] 1. Basic processing

[0069] (1) Check the location and size of door and window openings, the junction between concrete structure and masonry, and the wire conduit and distribution box. Nail the wire mesh behind it and seal the junction box tightly.

[0070] (2) Use a putty knife to scrape away dust, dirt and other adhesions on the walls and ceilings, and sprinkle water to moisten them.

[0071] (3) Before plastering, use a 2m ruler to check the original wall base. If the flatness and verticality errors exceed 15mm, and there are obvious unevenness in the base, such as large depressions, use base coarse aggregate to level it, scrape it evenly with a scraper, and compact it with a trowel.

[0072] 2. Apply primer

[0073] After the base is cleaned, partially leveled, compacted and dried, apply the anti-alkali primer. The anti-alkali primer is sprayed with an inorganic sprayer, and the wall and ceiling are sprayed evenly to avoid missing sprays.

[0074] 3. Leveling of base coarse aggregate

[0075] (1) First, use a barrel to prepare the base coarse aggregate sand ash. Base coarse aggregate: water = 1:0.26 (weight ratio); stir for 5 minutes, stir evenly, let it stand for 10 minutes, and stir for another 5 minutes before use.

[0076] (2) The total thickness of leveling is generally 10mm, which is carried out in two steps. First, use a trowel to level the mortar joints of the masonry wall, and scrape and fill the vertical and horizontal mortar joints evenly and fully, so that they are straight and flat with the wall. Then, the base coarse aggregate is leveled on the large surface of the wall. The first base coarse aggregate leveling is about 8mm thick, and the vertical leveling construction is carried out clockwise from top to bottom. Use a trowel or scraper tool to evenly apply the prepared base coarse aggregate to the wall to make the wall surface flat and straight. After the first mortar is 60% to 70% dry, apply the second coat. The second coat uses 2mm thick base coarse aggregate for leveling, and the horizontal leveling construction is carried out clockwise from left to right to make the surface flat and straight.

[0077] (3) When the first layer of coarse aggregate is applied to the base and leveled, glass fiber mesh cloth should be pasted at the holes and the junctions of walls of different materials. The overlap on both sides of the glass fiber mesh should be no less than 100 mm to prevent cracking at the junctions of different walls in the later stage.

[0078] (4) After the two layers of base coarse aggregate treatment are completed and dried, use an internal angle planer to straighten and grind the internal corners of the wall, and use a leveling planer to level and grind the wall surface.

[0079] (5) For the ceiling, base coarse aggregate is used for local primer and leveling, mainly for the corners of the beams, uneven holes in the beams, slight cracks and scratches, which are first repaired and leveled with base coarse aggregate.

[0080] 4. Scrape the base twice

[0081] The thickness of the first coat of colored stone powder mixture is about 0.8mm. The vertical construction is carried out clockwise from top to bottom. Use a trowel or scraper tool to evenly apply the prepared stone powder slurry to the wall. The wall surface is required to be scratch-free and basically flat and straight. Conventional application is troweling or scraping. After the painting is completed, wait for no less than 2 hours, and dry it thoroughly before applying the second coat of colored stone powder mixture. The thickness of the second coat of colored stone powder mixture is about 0.7mm. The horizontal construction is carried out clockwise from left to right, and the wall surface is required to be basically flat and smooth. After the painting is completed, wait for no less than 2 hours, and dry it thoroughly before proceeding to the next process.

[0082] When treating the stone powder paint base layer, a laser instrument is used to align the inner and outer corners of the wall columns, and inner corner strips are pasted on the inner corners and outer corner strips are pasted on the outer corners.

[0083] 5. Sandpaper polishing

[0084] After two coats of stone powder paint are applied and dried, sandpaper is used to polish and clean (no scratches, no lumps, no floating dust, and the local unevenness is repaired and leveled with base stone powder paint.

[0085] 6. Scrape the surface colored stone powder mixture

[0086] (1) After grinding, start scraping and applying the surface layer of colored stone powder mixture.

[0087] (2) The surface layer should be scraped and applied along the dividing lines of the partition joints, the inner corners or the outer corners of the wall. The vertical construction should be carried out in a clockwise direction from top to bottom, with uniform thickness and finishing treatment. The surface layer of the ceiling should reach a matte brightness, and the surface layer of the wall should reach a high brightness state.

[0088] 4. Performance Testing

[0089] Compressive strength test: Test specimens were made in accordance with relevant standards and subjected to a compressive strength test after 28 days of curing. The test result was 42 MPa, which met the strength requirements for building decoration materials.

[0090] Water resistance test: After the specimen was immersed in water for 72 hours, no obvious change was observed in its appearance, and the strength loss rate was 8%, indicating good water resistance.

[0091] Color stability test: After the test piece was exposed to the sun outdoors for 6 months, the color remained basically unchanged, indicating excellent color stability.

[0092] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

Claims

1. A colored stone powder mixture, characterized in that: The invention comprises 30 to 50 parts by weight of sand, 15 to 25 parts by weight of cement, 5 to 10 parts by weight of lime, 5 to 10 parts by weight of white lime, 5 to 10 parts by weight of glue and 0.1 to 5 parts by weight of natural pigment; The particle size of the sand is 0.1 to 1.5 mm; The fineness of the cement, lime and white lime is less than 80 mesh; The fineness of the natural pigment is 800-1200 meshes.

2. The colored stone powder mixture according to claim 1, characterized in that: The cement is silicate cement.

3. The colored stone powder mixture according to claim 1, characterized in that: The glue is silicone glue or PVA glue.

4. The colored stone powder mixture according to claim 1, characterized in that: The natural pigment is red iron oxide, yellow iron oxide, or ultramarine blue.

5. A method for preparing a colored stone powder mixture as claimed in any one of claims 1 to 4, characterized in that: The following steps are involved: Mix sand, cement, lime, lime and glue and stir at low speed to mix evenly to form a base material; The natural pigment is added into the base material and mixed with stirring at high speed to form a colored stone powder mixture.