Preparation method of bamboo wood and immature soil combined building block

Abstract

The invention discloses a preparation method of a bamboo wood and immature soil combined building block. Bamboo wood is selected, cut and polished into a double-hole rectangular structure and a single-hole cubic structure which are the same in height; carrying out 3D printing by taking native soil as a raw material to obtain a raw soil material and drying in the sun; after the dried immature soil material is filled into the holes of the bamboo cubic structure treated in the step 1, the overall prefabricated immature soil and the bamboo are shaped and cured until the immature soil and the bamboo are tightly attached to each other, and a prefabricated building block is obtained; and 4, forming a through hole in the immature soil center of the prefabricated building block to reduce the overall weight, thereby obtaining the combined building block. The raw soil-bamboo building block combination has the advantages of being low in cost, simple in material obtaining, good in heat insulation and heat preservation and the like, compared with concrete mixed soil and other materials, the green effect of sustainable development is achieved, environmental pollution is effectively reduced, and after a house is dismantled, the raw soil-bamboo building block combination can be recycled and can be planted, and the soil property is not damaged.

Description

Technical Field

[0001] The invention relates to a technology in the field of building materials, in particular to a method for preparing a bamboo and raw soil combined building block. Background Art

[0002] The existing bamboo is too light. If the whole wall is made of bamboo, its bearing capacity is weak, uneven, not fireproof, and it is easy to dry and crack. The raw soil material is not waterproof, and it is easy to cause structural instability after water seeps in. The existing preparation technology of bamboo-based bricks is cumbersome and the preparation work is cumbersome and time-consuming. It has high requirements for the fineness of bamboo and other aspects, which makes it difficult to apply to actual construction sites. Summary of the invention

[0003] In view of the above-mentioned deficiencies in the prior art, the present invention proposes a method for preparing a bamboo and raw soil combination building block, which has the advantages of raw soil such as low cost, easy material acquisition, and good thermal insulation. Compared with materials such as concrete mixed with soil, it not only achieves the green effect of sustainable development and effectively reduces environmental pollution, but the raw soil-bamboo building block combination can be recycled and planted after the house is demolished without damaging the soil properties.

[0004] The present invention is achieved through the following technical solutions:

[0005] The present invention relates to a method for preparing a bamboo and raw soil combined building block, comprising:

[0006] Step 1. Select bamboo and cut and polish it into a double-hole rectangular structure and a single-hole cubic structure of the same height, specifically: a double-hole rectangular structure with a thickness of 30 mm and an outer size of 480×240×180 mm and a single-hole cubic structure with an outer size of 240×240×180 mm.

[0007] The outer edge spacing between the two holes in the double-hole rectangular structure is 60 mm.

[0008] Step 2, 3D printing raw soil materials, specifically: using native soil as raw material to 3D print the raw soil materials and then drying them.

[0009] The original soil has particles smaller than 2 mm.

[0010] The compressive strength of the raw soil material obtained by the 3D printing is between 1.5MPa and 3.0MPa; the optimal moisture content is between 8% and 20%.

[0011] The sun drying is based on a water absorption rate between 10% and 20%.

[0012] Step 3: Fill the sun-dried raw soil material into the holes of the bamboo cube structure processed in step 1, and then shape and solidify the whole prefabricated raw soil and bamboo until the two are tightly fitted to obtain a prefabricated building block.

[0013] Preferably, when there is still a gap between the raw soil and the bamboo material, a polymer bonding slurry is poured into the gap to make the two fit tightly.

[0014] The polymer bonding slurry is, but not limited to, epoxy resin slurry, silicate polymer slurry, and latex slurry.

[0015] The prefabricated building blocks are waterproof, with a water permeability of less than 1% and a water absorption rate of less than 5%; fireproof; and a compressive strength of 40MPa to 80MPa; and subsequent maintenance of the outer bamboo material is relatively convenient compared to traditional raw earth building blocks.

[0016] Step 4: Open a hole in the center of the raw soil of the prefabricated block to reduce the overall weight. Specifically, place a mold with a length of 480mm, a width of 240mm, a height of 180mm, and two holes with a diameter of 60mm from 90mm from left to right and from right to left vertically into the prepared bamboo-raw soil composite block from top to bottom to make a hole. After placing the mold, remove the excess raw soil, and if necessary, tamp the raw soil in the block again to achieve a solid effect.

[0017] The present invention relates to a bamboo and raw soil combined building block prepared by the above method, comprising: a bamboo shell and a raw soil layer located inside the bamboo shell, wherein: the raw soil layer is 3D printed and has a hole in the center.

[0018] The bamboo shell and the raw soil layer can be set up in two forms, one is a cubic shape structure, and the other is an outer bamboo four-corner arc structure. Technical Effects

[0019] The present invention takes into account the advantages and disadvantages of bamboo and raw soil, effectively combines the two to take advantage of their strengths and avoid their weaknesses, and improves practicality and applicability. The overall construction is convenient and the quality of the prepared blocks is uniform, so they can be conveniently used in indoor and outdoor buildings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A top view of the composite building block of the present invention;

[0021] In the figure: 1 bamboo shell, 2 raw soil, 3 through hole;

[0022] Figure 2 It is a three-dimensional schematic diagram of the combined building block of the present invention;

[0023] Figure 3 A top view of a split half earth-bamboo composite block;

[0024] Figure 4 It is a three-dimensional schematic diagram of a detachable half-raw earth-bamboo composite building block;

[0025] Figure 5 A schematic diagram of a wall made of earth-bamboo blocks, where the small blocks are splittable halves of earth-bamboo blocks;

[0026] Figure 6 A schematic diagram of a prefabricated bamboo material of a composite building block of the present invention;

[0027] Figure 7 A schematic diagram of the prefabricated 3D printed raw soil of the composite building block of the present invention;

[0028] Figure 8 A schematic diagram of the combination of bamboo and raw soil of the composite building block of the present invention;

[0029] Fig. 9 A schematic diagram of the four corner arcs formed by the combined polishing of the bamboo shell of the present invention, with a radius of 5 mm;

[0030] Fig.10 Schematic diagram of the detachable half earth-bamboo composite building block, with the four corner arcs formed by polishing the bamboo shell and a radius of 5mm;

[0031] Fig.11 The complete process flow chart is shown in Figure 2. DETAILED DESCRIPTION

[0032] like Figure 1 As shown, this embodiment involves a bamboo and raw soil combined building block, the overall combined building block is 480mm long, 240mm wide and 180mm high, including bamboo materials with a thickness of 30mm on the periphery, bamboo materials separating the raw soil material part in the middle with a total thickness of 60mm, raw soil materials with a length and width of 180mm×180mm inside, and a 60mm diameter hole in the middle of the raw soil. Both materials are prefabricated materials, and the weight of the bamboo material is 0.64g / cm 3 The weight of raw soil varies from 1.3 to 1.8 g / cm2 depending on the density. 3 , the overall weight is 1.94-2.44g / cm 3 .

[0033] There are two combinations of masonry blocks. The first combination is a complete raw soil-bamboo masonry block combination, and the second combination is a detachable half raw soil-bamboo combination masonry block. In both cases, the prepared raw soil is directly stuffed into the bamboo. Ideally, the two fit tightly together. If there is still a gap between the two, a polymer bonding slurry is poured into the gap to make the two fit tightly together.

[0034] Prefabricating both materials can save time and labor. If this combined building block is prepared on site, the volume of wet soil and dry soil is not the same when pouring raw soil, and it is necessary to wait for the gaps created by the shrinkage of the wet soil before grouting. However, when bamboo is placed in the prefabricated raw soil material at the construction site, there is no need to wait and gaps can be observed directly, which can be filled with grouting immediately.

[0035] What needs to be confirmed is that the precision requirements of the prefabricated materials of the two are not the same as those of traditional prefabrication. If there is a gap between the prefabricated earth material and the prefabricated bamboo material, the two can be tightly fitted by grouting. At the same time, holes are opened in the earth part to reduce the weight and implement grouting to combine with other blocks to improve density and strength. The combined block can be understood as splitting the whole into two parts. When laying, they can be staggered. The two blocks that need to be staggered can be stacked with half a piece of earth-bamboo block combination to increase overall stability.

[0036] like Figure 2 As shown, the cut and polished bamboo outer circumference fits closely to the inner circumference of the raw earth material.

[0037] like Figure 3 As shown, a building block has been split into two halves made of bamboo and raw earth.

[0038] like Figure 4 As shown, holes in raw soil can effectively reduce the overall deadweight, and the location of the holes plays a role.

[0039] like Figure 5 As shown, the connection between the holes can form a pipeline, which can form air convection and have a certain thermal insulation, heat insulation and sound insulation effect. Secondly, it can be used to place wires without the need to make additional holes or perform open-wire processing on the wires during the construction process. Thirdly, for parts that bear greater strength, bamboo grouting can be inserted to increase the overall strength.

[0040] like Figure 6 As shown, the bamboo material is only cut and polished to prepare the bamboo outer shell.

[0041] like Figure 7 As shown, the blocks are formed after only the raw earth materials for 3D printing are dried.

[0042] like Figure 8 As shown, the raw materials of bamboo and raw soil are used as building blocks to the greatest extent possible.

[0043] like Fig. 9 As shown, the arcs of the combined angles are placed directly side by side to form a 10mm gap, in which a layer of adhesive can be applied to facilitate bonding and waterproofing. This arc combination is suitable for areas with high rainfall.

[0044] After the infinite compressive strength test, it was found that the strength value of the 3D printed raw earth blocks is between 0.8 and 2.4MPa; and the compressive strength of bamboo itself can reach 59.95MPa. Combining the two can achieve a certain strength.

[0045] The bamboo is only cut and polished according to size, while the original soil is only 3D printed without adding any additional additives. Both use the raw materials to the maximum extent without damaging the characteristics and properties of the materials themselves. The focus is on preparing composite blocks with a certain strength under the premise of considering the sustainable development goals. This composite block is also more convenient in the subsequent maintenance process compared to traditional composite blocks. For example, the polished outer bamboo surface not only has the beauty of the inconsistent color of the bamboo itself, but also can be coated with a layer of building wax to make it more durable. Among them, because the composite blocks are opened, the holes can be connected to form pipes, which can make the air convect, play a certain role in heat preservation, heat insulation, and sound insulation, and can also be used to place wires.

[0046] Compared with the prior art, the composite building blocks prepared by the present invention are made of raw materials of bamboo and raw soil. Not only does it take into account the goal of sustainable development and insist on moving towards green, but the openings in the building blocks effectively reduce their own weight, and the position of the holes plays a role, taking into account both practicality and applicability.

[0047] The above-mentioned specific implementation can be partially adjusted in different ways by those skilled in the art without departing from the principle and purpose of the present invention. The protection scope of the present invention shall be based on the claims and shall not be limited by the above-mentioned specific implementation. Each implementation scheme within its scope shall be subject to the constraints of the present invention.

Claims

1. A method for preparing a bamboo and soil combined building block, characterized in that: include: Step 1: Select bamboo and cut and polish it into a double-hole rectangular structure and a single-hole cube structure of the same height; Step 2, 3D printing raw soil materials, specifically: using native soil as raw material to 3D print the raw soil materials and then drying them; Step 3, filling the sun-dried raw soil material into the holes of the bamboo cube structure treated in step 1, and then shaping and curing the raw soil and bamboo as a whole until the two are tightly fitted to obtain a prefabricated building block; Step 4: Open a hole in the center of the raw soil of the prefabricated building block to reduce the overall weight and obtain a composite building block.

2. The method for preparing a bamboo and soil composite building block according to claim 1, characterized in that: Step 1 prepares a double-hole rectangular structure with a thickness of 30 mm and an outer size of 480×240×180 mm and a single-hole cubic structure with an outer size of 240×240×180 mm.

3. The method for preparing a bamboo and soil composite building block according to claim 1, characterized in that: The outer edge spacing between the two holes in the double-hole rectangular structure is 60 mm.

4. The method for preparing a bamboo and soil composite building block according to claim 1, characterized in that: The original soil has particles smaller than 2 mm.

5. The method for preparing a bamboo and soil composite building block according to claim 1, characterized in that: The compressive strength of the raw soil material obtained by the 3D printing is between 1.5MPa and 3.0MPa; the optimal moisture content is between 8% and 20%.

6. The method for preparing a bamboo and soil composite building block according to claim 1, characterized in that: The sun drying is based on a water absorption rate between 10% and 20%.

7. The method for preparing a bamboo and soil composite building block according to claim 1, characterized in that: When there is still space between the raw soil and the bamboo, a polymer adhesive slurry is poured into the space to make the two fit tightly together; The polymer bonding slurry is epoxy resin slurry, silicate polymer slurry or latex slurry.

8. The method for preparing a bamboo and soil composite building block according to claim 1, characterized in that: The prefabricated building blocks are waterproof, with a water permeability of less than 1%, a water absorption rate of less than 5%, fireproof, and a compressive strength of 40MPa to 80Mpa.

9. The method for preparing a bamboo and soil composite building block according to claim 1, wherein: The opening holes are specifically made by vertically placing a mold having a length of 480 mm, a width of 240 mm, a height of 180 mm, and two holes with a diameter of 60 mm from 90 mm from left to right and from right to left into the prepared bamboo-raw soil composite building block from top to bottom to open a hole. After placing the mold, removing the excess raw soil, the raw soil in the building block can be compacted again if necessary to achieve a solid effect.

10. A bamboo and soil composite building block prepared according to any one of claims 1 to 9, characterized in that: include: A bamboo shell and a raw soil layer inside the shell, wherein: the raw soil layer is 3D printed and has a hole in the center; The bamboo shell and the raw soil layer can be set up in two forms, one is a cubic shape structure, and the other is an outer bamboo four-corner arc structure.

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