Process for manufacturing a decorative indoor rammed earth column

Abstract

The application provides a manufacturing process of a decorative indoor rammed earth column, which comprises the following steps: step one, installing a decorative main frame, the bottom of the decorative main frame is welded with a pre-buried plate; step two, welding an angle code on the corresponding point of the decorative main frame; step three, setting a base panel on the periphery of the decorative main frame; step four, laying a steel mesh on the outside of the base panel; step five, setting a skirting on the periphery of the decorative main frame, setting a pouring mold on the skirting, and forming a pouring cavity between the pouring mold and the base panel; step six, layering rammed earth material into the mold and tamping layer by layer, removing the pouring mold after tamping and coagulation are completed; step seven, moving the pouring mold to the upper end of the coagulated rammed earth structure, and making the lower end of the pouring mold fit the outside of the rammed earth structure; and step eight, repeating steps six and seven until pouring is completed. The application adopts a method of pouring layer by layer from bottom to top, guarantees the forming effect of the rammed earth layer, reduces the manufacturing cost of the mold, and reduces the construction difficulty.

Description

Technical Field

[0001] This invention relates to the field of architectural decoration technology, and in particular to a manufacturing process for decorative indoor rammed earth columns. Background Technology

[0002] Rammed earth is an ancient building material, consisting of compacted, dense blocks of mud with few gaps, used for house construction. This technique has been used extensively in my country from the Neolithic Age until the 1950s and 60s. The basic method of rammed earth construction involves dry-laying and compacting layers of soil, a highly strenuous physical labor requiring thousands to tens of thousands of workers. Rammed earth walls were the earliest method used in my country for constructing city walls. They were built using templates filled with clay or limestone, and each layer was rammed with a pestle.

[0003] Modern rammed earth walls are divided into two types: solid rammed earth walls for construction and decorative rammed earth walls. Decorative rammed earth walls, like solid rammed earth walls, involve artistic creation based on formwork, filling, and compaction. To enhance the aesthetics of buildings, rammed earth structures are often used in the interiors of large hotels, banquet halls, and conference centers. However, due to the excessive weight of rammed earth walls, they are difficult to use solely as decorative structures indoors. Therefore, how to reduce the weight of rammed earth buildings while ensuring their structural stability is a pressing issue in the field of architectural decoration.

[0004] Chinese invention patent CN201911032099.2 discloses a method for preparing a decorative thin-walled rammed earth wall. The method involves setting fixing bolts on the surface of the structure to be decorated, installing angle steel in the vertical direction, and attaching screws to the fixing bolts. A thin-walled rammed earth wall template is then erected on the surface of the template via the screws. Soil is added between the wall and the template, and the wall is rammed. While this process overcomes the problem of the large weight of rammed earth walls used in shipbuilding, it requires a wall as a support and cannot be used to create a three-dimensional rammed earth structure independently. Summary of the Invention

[0005] In view of the shortcomings of the prior art described above, the purpose of this invention is to provide a manufacturing process for decorative indoor rammed earth columns, which solves the problems of rammed earth columns made by the existing technology being heavy, costly, and difficult to use solely as decorative structures indoors.

[0006] To achieve the above and other related objectives, the present invention provides a manufacturing process for decorative indoor rammed earth columns, comprising the following steps:

[0007] Step 1: Install the main decorative frame. An embedded plate is set at the connection between the main decorative frame and the ground. The embedded plate is fixed to the ground with chemical bolts. The bottom of the main decorative frame is welded to the embedded plate.

[0008] Step 2: Weld corner brackets to the corresponding positions on the main decorative frame;

[0009] Step 3: Install the base panel on the outer perimeter of the main decorative frame. First, drill holes on the base panel at the positions corresponding to the corner brackets, and then fix the base panel to the main decorative frame with self-drilling screws.

[0010] Step 4: Lay wire mesh on the outside of the base panel, pass the ends of the corner brackets through the wire mesh, place the vertical reinforcing ribs on the outside of the wire mesh, weld the vertical reinforcing ribs to the corner brackets, and apply slurry to the wire mesh to form an adhesive layer.

[0011] Step 5: Set the skirting board around the main decorative frame, support the casting mold on the skirting board, fix the casting mold to the base panel with bolts, and form a casting cavity between the casting mold and the base panel. Apply release agent to the inner wall of the casting cavity.

[0012] Step 6: The rammed earth material is poured into the mold in layers and compacted layer by layer. After compaction and solidification, the casting mold is removed.

[0013] Step 7: Move the casting mold to the top of the solidified rammed earth structure. The bottom of the casting mold should fit against the outside of the rammed earth structure, and the top should be fixed to the flame-retardant plate with bolts.

[0014] Step 8: Repeat steps 6 and 7 until the pouring is complete.

[0015] As a preferred technical solution, step eight further includes:

[0016] Step 9: Curing the rammed earth pillars and repairing any defects, contamination, or grout leakage.

[0017] Step 10: Apply a protective agent to the outer surface of the rammed earth column.

[0018] As a preferred technical solution, in step six, the method for preparing rammed earth material is as follows: first, add rammed earth powder, then add small stones, stir evenly, add water according to the viscosity, and stir using a mixer.

[0019] As a preferred technical solution, in step seven, after removing the casting mold, the holes left by fixing the casting mold on the rammed earth structure are repaired according to the color and texture effect.

[0020] As a preferred technical solution, in step nine, the curing time for the rammed earth pillar is 14 days in summer and 28 days in winter.

[0021] As a preferred technical solution, in step ten, the protective agent is applied by spraying or brushing, with two coats applied, and the second coat applied before the first coat is completely dry.

[0022] As a preferred technical solution, in step one, the decorative main frame includes supporting square steel, transverse square steel, longitudinal square steel, and connecting square steel. The bottom end of the supporting square steel is fixedly installed on the ground. The transverse square steel is arranged in multiple layers from the lower right to the top, forming a rammed earth column shape around the outside of the supporting square steel. The longitudinal square steel connects the transverse square steel between layers. The connecting square steel connects different spatial points in each layer of transverse square steel. The contact points of the supporting square steel, the transverse square steel, the longitudinal square steel, and the connecting square steel are all welded connections.

[0023] As a preferred technical solution, in step three, the base panel includes a flame-retardant board and a calcium silicate board from the inside out.

[0024] As a preferred technical solution, in step five, the casting mold is a ring-shaped sealed structure formed by horizontally splicing multiple pieces of organic transparent glass. The casting mold includes a flat template and an arc-shaped template. An angle steel is provided on the outside of the flat template. The angle steel and the flat template are fixedly connected to the flame-retardant board by bolts. An arc-shaped fixing frame is provided on the outside of the arc-shaped template. The shape of the arc-shaped fixing frame is the same as that of the arc-shaped template. The arc-shaped fixing frame and the arc-shaped fixing frame are fixed by bolts. The arc-shaped template is fixed to the flame-retardant board by bolts.

[0025] As a preferred technical solution, the distance between any two adjacent angle steels is 400 mm.

[0026] As described above, the manufacturing process of the decorative indoor rammed earth column of the present invention has the following beneficial effects:

[0027] (1) The present invention adopts a method of pouring from bottom to top layer by layer, which ensures the forming effect of the rammed soil layer, reduces the manufacturing cost of the mold, and reduces the construction difficulty.

[0028] (2) The indoor rammed earth column produced by the present invention uses a decorative support frame as the main support structure. The rammed earth is rammed on the outside of the main support structure to form a rammed earth column with a hollow interior. Without affecting the aesthetics of the rammed earth column, the overall weight of the rammed earth column is reduced, the production cost of the rammed earth column is reduced, and the application of rammed earth technology in the field of interior decoration is realized.

[0029] (3) The casting mold of the present invention is made of organic transparent glass, which makes it easy to adjust the layers, texture and color of the rammed soil, and ensures that the ramming effect of the rammed soil layer meets the design requirements.

[0030] (4) The decorative support frame of the present invention is formed by welding supporting square steel, transverse square steel, longitudinal square steel and connecting square steel. The square steels restrict each other to ensure that the supporting steel frame will not deform. At the same time, the supporting steel frame is covered with flame-retardant board and calcium silicate board, so that the rammed earth column has flame-retardant properties while ensuring that the rammed earth material will not enter the interior of the decorative steel frame during the ramming process. Attached Figure Description

[0031] Figure 1 This is one of the structural schematic diagrams of the main decorative frame in the indoor decorative rammed earth column casting device of the present invention.

[0032] Figure 2 The image shown is a second schematic diagram of the main decorative frame in the interior decorative rammed earth column casting device of the present invention.

[0033] Figure 3 The diagram shows the structure of the base panel, wire mesh, and vertical reinforcing bars in the rammed earth column casting device for interior decoration of the present invention.

[0034] Figure 4 The diagram shows the installation structure of the skirting board and the main decorative frame in the indoor decorative rammed earth column casting device of the present invention.

[0035] Figure 5 The diagram shows the installation structure of the casting mold in the rammed earth column for interior decoration according to the present invention.

[0036] Figure 6 The diagram shows the layered structure of the rammed earth column for interior decoration according to the present invention.

[0037] Figure 7 The image shown is a cross-sectional view of the rammed earth column casting device for interior decoration according to the present invention.

[0038] The specific descriptions of the attached drawings are as follows: 1. Decorative main frame; 11. Supporting square steel; 12. Horizontal square steel; 13. Longitudinal square steel; 14. Connecting square steel; 15. L-shaped square steel; 2. Angle bracket; 3. Flame-retardant board; 4. Calcium silicate board; 5. Wire mesh; 6. Vertical reinforcing rib; 7. Skirting board; 8. Adhesive layer; 9. Casting mold; 10. Angle steel; 110. Rammed earth layer; 120. Arc-shaped fixing frame; 130. Arc-shaped template; 140. Flat template. Detailed Implementation

[0039] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0040] Please see Figures 1 to 6It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding and reading. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0041] Example 1

[0042] This embodiment provides an indoor decorative rammed earth column casting device, including a decorative main frame 1, a base panel, a wire mesh 5, vertical reinforcing bars 6, and a casting mold 9.

[0043] like Figures 1-2As shown, the main decorative frame 1 is used to form the main structure of the interior decorative rammed earth column. The main decorative frame 1 is connected to the ground with an embedded plate, which is fixed to the ground with chemical bolts. The size of the embedded plate is 350*350*10 mm, and the chemical bolts used are RM12 chemical bolts. At the same time, an embedded plate is set at the connection between the main decorative frame 11 and the wall. The embedded plate is fixed to the wall with chemical bolts. The size of the embedded plate at this location is 200*200*8 mm, and the chemical bolts used are RM12 chemical bolts. The embedded plates at the ground and the embedded plates at the wall must be secure after installation, and there should be no looseness or suspension. The main decorative frame 1 is constructed from welded square steel, including supporting square steel 11, transverse square steel 12, longitudinal square steel 13, and connecting square steel 14. In this embodiment, the supporting square steel 11 is made of 400*200*8mm hot-dip galvanized square tubing. The bottom end of the hot-dip galvanized square tubing is welded to an embedded plate on the ground. The verticality of the supporting square steel 11 is adjusted within the allowable error range, and the weld points are treated with rust prevention. The transverse square steel 12 is made of 50*50*5mm hot-dip galvanized square tubing, arranged in multiple layers from the lower right to the upper left outside the supporting square steel 11. The spacing between the layers of transverse square steel 12 is 600mm. The transverse square steel 12 forms a closed-loop structure, creating the shape of a rammed earth column, including straight and curved sections. Angle brackets 2 are pre-embedded on the transverse square steel 12 for easy later connection. The spacing between the angle brackets 2 is 400mm, and the size of the angle brackets 2 is 50*50*5mm. All weld points are treated with rust prevention. The longitudinal square steel 13 connects the transverse square steel 12 between layers. The longitudinal square steel 13 is made of 50*50*5mm hot-dip galvanized square tubing, and all weld points are treated with rust prevention. The connecting square steel 14 connects different spatial points in each layer of transverse square steel 12. The contact points of the supporting square steel 11, transverse square steel 12, longitudinal square steel 13, and connecting square steel 14 are all welded connections. The transverse square steel 12 includes straight sections and curved sections. The curved sections are connected to the supporting square steel 11 by L-shaped square steel 15, and the corners of the L-shaped square steel 15 are connected to the curved sections. The plane of the transverse square steel 12 is perpendicular to the supporting square steel 11, the longitudinal square steel 13 is parallel to the supporting square steel 11, and the connecting square steel 14 is parallel to the supporting square steel 11. One side of the connecting square steel 14 is attached to the supporting square steel 11, and one side of part of the longitudinal square steel 13 is attached to the supporting square steel 11.

[0044] like Figure 3As shown, the main decorative frame 1 is surrounded by a base panel, and the base panel is surrounded by a wire mesh 5. The wire mesh 5 is fixedly connected to the transverse square steel 12 and the longitudinal square steel 13 by bolts. The end of the angle bracket 2 passes through the base panel and the wire mesh 5. The base panel can only be installed after the concealed acceptance of the main decorative frame 1 is qualified. The base panel includes a flame-retardant board 3 and a calcium silicate board 4. The flame-retardant board 3 is set inside the calcium silicate board 4. Due to the insufficient plasticity and nail-holding power of the calcium silicate board 4, the base uses a 15mm thick flame-retardant board 3. Flame-retardant board 3, with grooves and bends at the arc-shaped positions, is fixed to a 50*50*5mm hot-dip galvanized square tube using self-drilling screws. After the flame-retardant board 3 is fixed, its flatness is inspected. Once the inspection is passed, calcium silicate board 4 is laid on top of the flame-retardant board 3. At the arc-shaped positions, calcium silicate board 4 is cut into strips and tightly spliced ​​with automatic screws at intervals of 150-170mm. The corner bracket 2 can be installed by manually cutting the board material. Dust removal equipment should be used to remove dust during cutting. For ease of installation, the positions of corner bracket 2 can be marked on the base panel before drilling holes. Wire mesh 5 is covered with calcium silicate board 4 and fixed to the main frame with bolts. To increase the strength between the rammed earth and the calcium silicate board, a slurry treatment is required to form an adhesive layer 8. The adhesive layer 8 is made of a mixture of glue, cement, and mortar. Before slurrying, the calcium silicate board and wire mesh 5 are cleaned and the reinforcing bars are moistened with water. The premixed material is gradually and evenly applied to the wire mesh 5, with each application of slurry being uniform and moderate. Vertical reinforcing ribs 6 are welded onto corner bracket 2. The vertical reinforcing ribs 6 are made of hot-dip galvanized square tubes with a specification of 20*20*2. The vertical reinforcing ribs 6 are used to increase the reliability of the vertical reinforcing ribs 6. When welding the vertical reinforcing ribs 6, ensure that the verticality of each vertical reinforcing rib 6 is within the allowable error range. The weld joints are treated with rust prevention. The vertical reinforcing ribs 6 are staggered with the longitudinal square steel 13.

[0045] like Figure 4 As shown, a skirting board 7 is provided on the outside of the main frame 1. A gap is formed between the skirting board 7 and the main frame 1. The base panel and wire mesh 5 are located in the gap. The vertical reinforcing ribs 6 and the rammed earth layer 110 are located on the upper part of the skirting board 7. The outer edge of the skirting board 7 protrudes from the rammed earth layer 110.

[0046] like Figures 5-7As shown, a casting cavity is formed between the casting mold 9 and the base panel. The vertical reinforcing rib 6 is located inside the casting cavity. The casting mold 9 and the flame-retardant plate 3 are fixedly connected by bolts. The casting mold 9 is made of organic transparent glass. In this embodiment, the casting mold 9 is a ring-shaped sealed structure formed by horizontally splicing multiple pieces of organic transparent glass. The casting mold 9 includes a flat template 140 and an arc template 130. Angle steel 10 is provided on the outside of the flat template 140. The angle steel 10 and the flat template 140 are fixedly connected to the flame-retardant plate 3 by bolts. The distance between any two adjacent angle steel 10s is 400 mm. An arc-shaped fixing frame 120 is provided on the outside of the arc template 130. The shape of the arc-shaped fixing frame 120 is the same as that of the arc template 130. The arc-shaped fixing frame 120 is fixed to the arc template 130 by bolts. A steel square tube with a specification of 20*20mm is longitudinally arranged between the arc template 120 and the arc template 130. The arc template 130 is fixed to the flame-retardant plate 3 by bolts. During pouring, the pouring mold 9 is erected from bottom to top, with the lowest layer 9 placed on the kick plate 7. The mold is adjusted to be vertical according to the site boundary line. The materials used for the rammed earth layer 110 must be mixed on-site strictly according to the rammed earth material mix ratio. The amount of each raw material for each batch of rammed earth is determined according to the mix ratio, and the weighing standards for rammed earth powder and small stones are fixed separately. Each batch is weighed when loading. The loading sequence should be: first load the rammed earth powder, then the small stones, mix evenly, and then add an appropriate amount of water according to the viscosity requirements, and mix with a mixer. The mixing time is determined based on the experimental results of the shortest mixing time for rammed earth. Before loading, debris in the pouring mold 9 and oil stains on the vertical reinforcing ribs 6 should be cleaned, and the positional relationship between the vertical reinforcing ribs 6 and the rammed earth layer 110 should be checked. The pouring mold 9 should be evenly coated with a release agent before loading. The mixed rammed earth material can be transported on-site using wheelbarrows, buckets, etc. After mixing and unloading, it should be promptly transported to the feeding location, with the time not exceeding the initial setting time of the rammed earth material. The rammed earth material should be poured into the mold using a shovel or a specially made small hopper. The rammed earth material should be poured into the mold in layers and compacted layer by layer, with each layer's thickness controlled between 80 and 150 mm. When ramming the rammed earth material, the vertical reinforcing ribs 6 and angle brackets 2 must not be touched. During ramming, the condition of the ramming hammer should be checked frequently to avoid bulging, hollow areas, etc. The distance between hammer movements should be less than 100 mm, and the duration of each hammer point should be until a layer of slurry appears on the surface. Pay attention to the wire mesh 5 during ramming. To prevent missed hammering, continuous ramming must be performed on both sides of the vertical reinforcing ribs 6. The rammed earth wall can be demolded 72 hours after setting. After demolding, promptly repair any holes left by the casting mold 9 on the rammed earth column according to the color and texture effect, and protect the finished product. After the casting mold 9 is removed, it is moved to the top of the cast rammed earth structure. The lower part of the casting mold 9 is attached to the rammed earth structure, and the upper part is fixed to the flame-retardant plate 3 with bolts. The casting process is repeated until the casting is completed. The curing time for the rammed earth column is 14 days in summer and 28 days in winter. After the moisture content is less than 10%, a protective agent is applied.Minor imperfections do not require repair. However, for defects such as contamination or significant grout leakage in rammed earth columns, appropriate repairs should be made before applying the protective agent. The protective agent should be diluted with water according to a reasonable ratio, stirred evenly, and then applied by spraying or brushing. Two coats should be applied, with the second coat applied before the first coat is completely dry, ensuring complete coverage without dripping or missed areas.

[0047] Example 2

[0048] This embodiment provides a manufacturing process for decorative indoor rammed earth columns, including the following steps:

[0049] Step 1: Install the main decorative frame 1. An embedded plate is set at the connection between the main decorative frame 1 and the ground. The embedded plate is fixed to the ground with chemical bolts. The bottom of the main decorative frame 1 is welded to the embedded plate.

[0050] Step 2: Weld corner brackets 2 to the corresponding positions on the main decorative frame 1;

[0051] Step 3: Install a base panel on the outer perimeter of the main decorative frame 1. First, drill holes on the base panel at the positions corresponding to the corner brackets 2, and then fix the base panel to the main decorative frame 1 with self-drilling screws.

[0052] Step 4: Lay wire mesh 5 on the outside of the base panel, pass the end of the corner bracket 2 through the wire mesh 5, set the vertical reinforcing rib 6 on the outside of the wire mesh 5, weld the vertical reinforcing rib 6 to the corner bracket 2, and apply slurry to the wire mesh 5 to form an adhesive layer 8.

[0053] Step 5: Set the skirting board 7 around the main decorative frame 1, and support the casting mold 9 on the skirting board 7. The casting mold 9 is fixed to the base panel with bolts. A casting cavity is formed between the casting mold 9 and the base panel. Apply a release agent to the inner wall of the casting cavity.

[0054] Step 6: The rammed earth material is poured into the mold in layers and compacted layer by layer. After compaction and solidification, the casting mold is removed.

[0055] Step 7: Move the casting mold to the upper part of the solidified rammed earth structure. The lower end of the casting mold 9 is attached to the outer side of the rammed earth structure, and the upper part is fixed to the flame-retardant plate 3 by bolts.

[0056] Step 8: Repeat steps 6 and 7 until the pouring is complete;

[0057] Step 9: Curing the rammed earth pillars and repairing any defects, contamination, or grout leakage.

[0058] Step 10: Apply a protective agent to the outer surface of the rammed earth column.

[0059] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A manufacturing process for decorative indoor rammed earth columns, characterized in that, Includes the following steps: Step 1: Install the main decorative frame. An embedded plate is set at the connection between the main decorative frame and the ground. The embedded plate is fixed to the ground with chemical bolts. The bottom of the main decorative frame is welded to the embedded plate. Step 2: Weld corner brackets to the corresponding positions on the main decorative frame; Step 3: Install the base panel on the outer perimeter of the main decorative frame. First, drill holes on the base panel at the positions corresponding to the corner brackets, and then fix the base panel to the main decorative frame with self-drilling screws. Step 4: Lay wire mesh on the outside of the base panel, pass the ends of the corner brackets through the wire mesh, place the vertical reinforcing ribs on the outside of the wire mesh, weld the vertical reinforcing ribs to the corner brackets, and apply slurry to the wire mesh to form an adhesive layer. Step 5: Set the skirting board around the main decorative frame, support the casting mold on the skirting board, fix the casting mold to the base panel with bolts, and form a casting cavity between the casting mold and the base panel. Apply release agent to the inner wall of the casting cavity. Step 6: The rammed earth material is poured into the mold in layers and compacted layer by layer. After compaction and solidification, the casting mold is removed. Step 7: Move the casting mold to the top of the solidified rammed earth structure, with the bottom of the casting mold fitting against the outside of the rammed earth structure, and the top fixed to the flame-retardant plate with bolts. Step 8: Repeat steps 6 and 7 until the pouring is complete; In step five, the casting mold is a ring-shaped sealed structure formed by horizontally splicing multiple pieces of organic transparent glass. The casting mold includes a flat template and an arc-shaped template. An angle steel is provided on the outside of the flat template. The angle steel and the flat template are fixedly connected to the flame-retardant board by bolts. An arc-shaped fixing frame is provided on the outside of the arc-shaped template. The shape of the arc-shaped fixing frame is the same as that of the arc-shaped template. The arc-shaped fixing frame and the arc-shaped template are fixed by bolts. The arc-shaped template is fixed to the flame-retardant board by bolts.

2. The manufacturing process of a decorative indoor rammed earth column as described in claim 1, characterized in that, Step eight is followed by: Step 9: Curing the rammed earth pillars and repairing any defects, contamination, or grout leakage. Step 10: Apply a protective agent to the outer surface of the rammed earth column.

3. The manufacturing process of a decorative indoor rammed earth column as described in claim 1, characterized in that, In step six, the method for preparing rammed earth material is as follows: first, add rammed earth powder, then add small stones, stir evenly, add water according to the viscosity, and stir with a mixer.

4. The manufacturing process of a decorative indoor rammed earth column as described in claim 1, characterized in that, In step seven, after removing the casting mold, the holes left by fixing the casting mold on the rammed earth structure are repaired according to the color and texture effect.

5. The manufacturing process of a decorative indoor rammed earth column as described in claim 2, characterized in that, In step nine, the curing time for the rammed earth pillars is 14 days in summer and 28 days in winter.

6. The manufacturing process of a decorative indoor rammed earth column as described in claim 2, characterized in that, In step ten, the protective agent is applied by spraying or brushing, with two coats applied. The second coat is applied before the first coat is completely dry.

7. The manufacturing process of a decorative indoor rammed earth column as described in claim 1, characterized in that, In step one, the main decorative frame includes supporting square steel, horizontal square steel, vertical square steel, and connecting square steel. The bottom end of the supporting square steel is fixedly installed on the ground. The horizontal square steel is arranged in multiple layers from bottom to top, forming a rammed earth column shape around the outside of the supporting square steel. The vertical square steel connects the horizontal square steel between layers. The connecting square steel connects different spatial points in each layer of horizontal square steel. The contact points of the supporting square steel, the horizontal square steel, the vertical square steel, and the connecting square steel are all welded connections.

8. The manufacturing process of a decorative indoor rammed earth column as described in claim 1, characterized in that, In step three, the base panel includes a flame-retardant board and a calcium silicate board from the inside out.

9. The manufacturing process of a decorative indoor rammed earth column as described in claim 1, characterized in that, The distance between any two adjacent angle steels is 400 mm.

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