Bamboo mortar, bamboo mortar molding, bamboo mortar premix material, bamboo mortar generating method, and bamboo mortar forming method

Abstract

To provide a bamboo mortar capable of exhibiting a grass-preventing function at a construction site where deterioration or inability of the grass-preventing function is likely to occur by a cement mortar or a bamboo soil pavement material, or a method for producing the bamboo mortar.SOLUTION: A bamboo mortar is prepared by adding three kinds of main raw materials including: a sediment material; 5-10 pts.mass of bamboo chips having a water content of 20% or less to 100 pts.mass of the sediment material (in terms of dry mass); and 10-20 pts.mass of a solidifying material containing cement to 100 pts.mass of the sediment material (in terms of dry mass) (addition step), then these are mixed to produce an uncured bamboo mortar (mixing step), the uncured bamboo mortar is applied to a place where the uncured bamboo mortar is applied, for example, by filling, coating, paving, or other placing (construction step), and the bamboo mortar is cured after the application (curing step) to obtain a cured bamboo mortar (cured bamboo mortar).SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to bamboo mortar using bamboo chips, bamboo mortar molded products molded using bamboo mortar, bamboo mortar premix materials used to produce bamboo mortar, a bamboo mortar production method for producing bamboo mortar, and a bamboo mortar molding method for molding bamboo mortar molded products. [Background technology]

[0002] Conventional cement mortar is made by drying and solidifying fresh cement mortar, which is a slurry-like mixture of sand, cement, and water in an unhardened state. Such cement mortar is widely and generally used for a wide variety of purposes, such as a substitute for concrete floors, a concrete joint material, and various fillers.

[0003] However, most cement mortars have the problem that weeds grow and multiply on the surface of the ground covered by them within a short period of time, about three months to one year. In particular, when cement mortar is used as a joint material, the joints are extremely prone to cracking, and the presence of these cracks and the weeds that grow out of the cracks makes the joints look bad.

[0004] For this reason, in order to prevent cracks in such joints and the growth of weeds through them, an attempt was made to use the bamboo clay paving material described in Patent Document 1.

[0005] Here, the bamboo clay paving material is a mixture of bamboo chips, soil and sand material, solidification material, and water by stirring, etc. This bamboo clay paving material has a moisture content of 30% to 80% for the bamboo chips, a moisture content of the soil and sand material of 10 to 30%, the solidification material is cement or coal ash, and the soil and sand dry weight ratio is 2 to 8%, and the water required for compaction is adjusted by adding water within the range required for compacting the bamboo clay paving material, and it can suppress the proliferation of commonly growing weeds, even compared to conventional cement mortar. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 5777084 Summary of the Invention [Problem to be solved by the invention]

[0007] However, when the above-mentioned bamboo clay paving material is used to pave the ground, a rolling process is required to compact the bamboo clay paving material that has been laid on the ground. Therefore, when the material is applied (including filling, spreading, paving and other pouring; the same applies below) to areas where such compaction is difficult, there is a problem that poor or difficult compaction occurs, and as with the application of cement mortar, weeds will grow and multiply at the application site.

[0008] For example, in places where compaction is difficult, such as narrow areas where it is difficult to bring in compaction machines, or in places where compaction is impossible in the first place, joints between components such as tiles or bricks that were originally sealed with cement mortar, even if bamboo clay paving materials are applied there, compaction is impossible or difficult, and the strength of the joint material is weakened, resulting in the joint material cracking and weeds growing through the cracks to the ground surface, reducing its weed control function by half and causing the invasion of underground plants. Similarly, there is a problem that cement mortar and bamboo clay paving materials do not have sufficient weed control function as joint materials or base materials for interlocking blocks, which are often used on sidewalks.

[0009] The present invention has been made to solve the above-mentioned problems, and aims to provide bamboo mortar, bamboo mortar molded products, bamboo mortar premix materials, a bamboo mortar production method, and a bamboo mortar molding method that can exert weed-prevention functions in construction locations where cement mortar and bamboo soil paving materials are prone to a reduction or inability to exert their weed-prevention functions. [Means for solving the problem]

[0010] To achieve this objective, the bamboo mortar of the first invention is an unhardened mixture obtained by mixing soil and sand material with 5 to 10 parts by mass of bamboo chips with a moisture content of 20% or less per 100 parts by mass of the dry mass of the soil and sand material, and 10 to 20 parts by mass of a solidification material containing cement per 100 parts by mass of the dry mass of the soil and sand material, or an unhardened mixture to which workability improving water has been added to impart workability to the unhardened mixture when the workability of the unhardened mixture is insufficient.

[0011] The cement contained in the solid material is a hydraulic cement that hardens through a hydration reaction with water, and includes, for example, Portland cement such as ordinary Portland cement and high-early-strength Portland cement, and mixed cement such as blast-furnace cement. For example, from the viewpoint of suppressing the elution of hexavalent chromium, blast-furnace cement is preferable.

[0012] The bamboo mortar of the second invention is a hardened product obtained by mixing an unhardened mixture of soil and sand material, 5 to 10 parts by mass of bamboo chips with a moisture content of 20% or less per 100 parts by mass of the dry mass of the soil and sand material, and 10 to 20 parts by mass of a solidification material containing cement per 100 parts by mass of the dry mass of the soil and sand material, and the hardened product has hardened due to the hydration reaction of the cement contained in the solidification material, and the bamboo chips are present in the hardened product.

[0013] The bamboo mortar molded product of the third invention is a hardened product formed when the unhardened mixture described in the first or second invention is placed into a formwork and the unhardened mixture hardens, the hardened product being caused by the hydration reaction of the cement contained in the solidification material, the bamboo chips being present in the hardened product, and the molded product being formed using the formwork.

[0014] The bamboo mortar premix material of the fourth invention can be mixed with soil and sand material to produce the unhardened mixture described in the first or second invention, and is a premix mixture obtained by mixing 5 to 10 parts by mass of bamboo chips with a moisture content of 20% per 100 parts by mass of the dry soil and sand material, and 10 to 20 parts by mass of a solidification material containing cement per 100 parts by mass of the dry soil and sand material.

[0015] The bamboo mortar premix material of the fifth invention is a premix mixture prepared by mixing soil and sand material with 5 to 10 parts by mass of bamboo chips having a moisture content of 20% or less per 100 parts by mass of the dry soil and sand material, and 10 to 20 parts by mass of a solidification material containing cement per 100 parts by mass of the dry soil and sand material, in order to produce the unhardened mixture described in the first or second invention.

[0016] The bamboo mortar production method of the sixth invention includes an addition step of adding soil material, 5 to 10 parts by mass of bamboo chips with a moisture content of 20% or less per 100 parts by mass of the dry mass of the soil material, and 10 to 20 parts by mass of a solidification material containing cement per 100 parts by mass of the dry mass of the soil material, as main raw materials, and a mixing step of mixing the soil material, bamboo chips, and solidification material added in the addition step to produce an unhardened mixture.

[0017] The seventh invention's method for producing bamboo mortar includes a mixing process for mixing soil and sand material with 5 to 10 parts by mass of bamboo chips with a moisture content of 20% or less per 100 parts by mass of the dry mass of the soil and sand material, and 10 to 20 parts by mass of a solidification material containing cement per 100 parts by mass of the dry mass of the soil and sand material to produce an unhardened mixture, an application process for applying the unhardened mixture produced by the mixing process to an application site, and a curing process for hardening the unhardened mixture applied by the application process through a hydration reaction of the cement to produce hardened bamboo mortar in which the bamboo chips are present in the cement hydrate.

[0018] The bamboo mortar production method of the eighth invention includes a water-adding and adjusting step of adding workability-improving water before or during the mixing step described in the sixth or seventh invention to impart workability fluidity to the unhardened mixture mixed in the mixing step.

[0019] The bamboo mortar molding method of the 9th invention includes a mixing step of mixing soil and sand material with 5 to 10 parts by mass of bamboo chips with a moisture content of 20% or less per 100 parts by mass of the dry mass of the soil and sand material, and 10 to 20 parts by mass of a solidification material containing cement per 100 parts by mass of the dry mass of the soil and sand material to produce an unhardened mixture, and a molding step of pouring the unhardened mixture produced in the mixing step into a formwork and hardening it by the hydration reaction of the cement, thereby producing a hardened bamboo mortar molded product in which the bamboo chips are present in the cement hydrate.

[0020] The bamboo mortar molding method of the 10th invention includes a water-adding and adjusting step of adding workability-improving water before or during the mixing step described in the 9th invention to impart workability fluidity to the unhardened mixture mixed in the mixing step. Effect of the Invention

[0021] According to the bamboo mortar, bamboo mortar molded products, bamboo mortar premix materials, bamboo mortar production method, and bamboo mortar molding method of the present invention (collectively referred to as the "bamboo mortar related inventions"), there is no need to compact the bamboo mortar when applying it, which has the effect of making it extremely easy to apply even in places where compaction is difficult or impossible, such as small, narrow plots of land where it is difficult to bring in compaction machinery.

[0022] Furthermore, because the hardened bamboo mortar contains bamboo chips in its cement hydrate, the (bamboo) fibers from the bamboo chips can prevent cracks in the cement hydrate and inhibit weeds from growing out of such cracks to the ground surface. As a result, it is possible to impart a weed-prevention function to the construction site and prevent the erosion and proliferation of underground stem plants.

[0023] Furthermore, in addition to the narrow spaces mentioned above, the hardened bamboo mortar of the present invention can also be used in places where compaction is difficult or impossible in the first place and which have traditionally been sealed with cement mortar, such as the joints between various components such as the joints between tiles, between bricks, and between interlocking blocks, as well as the base for these. By pouring, filling, or applying bamboo mortar into these places as a joint material or base material, the bamboo chip fibers present in the cement hydrate of the bamboo mortar can be interposed to prevent cracks in the joint material or base material, thereby preventing weeds from growing out of the ground surface through such cracks. As a result, a weed-prevention function can be imparted to the construction site, and the erosion and proliferation of underground stem plants can be prevented.

[0024] Furthermore, the bamboo chips contained in this bamboo mortar have their moisture content adjusted in advance to 20% or less, so that the bamboo chips are prevented from becoming overhydrated and undergoing decay through lactic acid fermentation, etc., prior to the production and construction of the bamboo mortar. This prevents the bamboo chips from becoming rotten when the bamboo mortar is produced, and as a result, it is possible to produce bamboo mortar without compromising the water absorption and permeability functions and fiber-reinforcing functions required of the bamboo chips. [Brief description of the drawings]

[0025] [Figure 1] 1 is a flowchart showing a method for producing bamboo chips. [Diagram 2] 1 is a flowchart showing a bamboo mortar producing method and a bamboo mortar molding method. [Diagram 3] 1 is a flowchart showing a method for producing bamboo mortar using bamboo solid premix material. [Figure 4] 1 is a flowchart showing a method for producing bamboo mortar using bamboo-solid soil premix material. [Diagram 5] 1 is a flow chart for a method for producing bamboo mortar using solid soil premix material. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0026] Hereinafter, the bamboo mortar, the bamboo mortar molded product, the bamboo mortar premix material, the bamboo mortar production method, and the bamboo mortar molding method, which are one embodiment of the present invention, will be described with reference to the attached drawings. Here, Fig. 1 is a flow chart of the bamboo chip production method, and Fig. 2 is a flow chart of the bamboo mortar production method and the bamboo mortar molding method.

[0027] As shown in Figure 2, the bamboo mortar produced by the bamboo mortar production method of this embodiment is different from conventional bamboo clay paving materials used for paving purposes, and is suitable for use as a substitute for, for example, concrete floors, cement mortar or concrete joint materials, or cement mortar or concrete fillers.

[0028] This bamboo mortar is made from bamboo chips, soil and sand materials, and solidification materials as its main raw materials, and these main raw materials have been thoroughly mixed so that they are evenly intermixed (hereinafter referred to as a "homogeneous mixture").

[0029] Thus, while bamboo mortar may at first glance appear to be similar to conventional bamboo paving materials in terms of the types of main raw materials used, the mixing ratio of the main raw materials (hereinafter also referred to as the "addition amount") and moisture content are completely different from those of conventional bamboo clay paving materials, and therefore its appropriate uses are not as a paving material, but rather as, for example, a joint material, filler, coating material, or low-strength concrete material.

[0030] Here, bamboo mortar refers to two states (properties): bamboo mortar that is unhardened and absorbs moisture, becoming a slurry or paste (referring to fresh bamboo mortar; hereafter also referred to as "unhardened bamboo mortar"), and unhardened bamboo mortar that has hardened (hereafter also referred to as "hardened bamboo mortar" or "hardened bamboo mortar"; the same applies below), and the term encompasses both of these concepts. Unless otherwise specified, hereafter "bamboo mortar" will refer to "hardened bamboo mortar" or "hardened bamboo mortar".

[0031] <Mixing ratio of main raw materials for bamboo mortar> Unhardened bamboo mortar is a slurry or paste-like unhardened bamboo mortar made by mixing soil material, bamboo chips with a moisture content of 20% or less (5 to 10 parts by mass per 100 parts by mass of the dry mass of the soil material), and a solidification material containing cement (10 to 20 parts by mass per 100 parts by mass of the dry mass of the soil material) by stirring or other means.

[0032] In contrast, hardened bamboo mortar is a hardened cement hydrate (solidified product) that is formed when the cement, the solidifying material contained in the unhardened bamboo mortar mentioned above, hardens through a hydration reaction, and contains bamboo chips mixed in.

[0033] In this embodiment, the mixing ratio of bamboo chips and solidification material to the soil material is expressed using a mass ratio (parts by mass), and these mass ratios of bamboo chips and solidification material are shown as values ​​relative to the dry mass of the soil material (the same applies below).

[0034] Next, referring to FIG. 1 and FIG. 2, each main raw material for the bamboo mortar of this embodiment will be described below.

[0035] <Bamboo chips> The bamboo chips used in the bamboo mortar production method shown in Figure 2 are an aggregate of numerous small pieces made by crushing the bamboo plant into small chips about 30 mm long, and although some of this aggregate may contain small chip-like pieces longer than 30 mm, they are generally crushed into small chip-like pieces less than 50 mm long. Each small piece of bamboo chip is a fibrous material made of bamboo fiber.

[0036] However, the bamboo chips used in bamboo mortar have a significantly different moisture content compared to the bamboo chips used in conventional bamboo soil paving materials, with the moisture content being 20% ​​or less, and more preferably 10% or less. Furthermore, these bamboo chips are added in an amount of 5 to 10 parts by mass per 100 parts by mass of the dry mass of the soil and sand material.

[0037] Here, bamboo chips are manufactured using only the raw material of the culm (called the "culm," which is the part of the bamboo that corresponds to the trunk of a tree and has internodes and nodes alternating along its length. Hereinafter referred to as "bamboo culm"), which is obtained by removing the branches and leaves from felled bamboo. The bamboo culm has vascular bundles that run along its length and contain a large amount of water.

[0038] However, if bamboo culms that still contain moisture (specifically, those with a moisture content of 30% or more) are crushed into chips, the large amount of moisture remaining in the bamboo chips causes lactic acid fermentation to begin in the bamboo chips immediately after they are chipped, causing the chips to rot and become moldy, making them unsuitable as the main raw material for bamboo mortar.

[0039] It is also possible to dry the bamboo after it has been processed into chips. However, in this case, for example, a large dryer or a large area for drying in the sun is required for such drying, which not only increases the equipment costs, but also creates the problem that if the drying process is not carried out immediately after chipping, the above-mentioned decay will progress quickly, making quality control more complicated.

[0040] Therefore, in the method for producing bamboo chips to be used in the bamboo mortar of this embodiment, in order to prevent the bamboo chips from rotting or becoming moldy after production, the raw material, bamboo culms or bamboo culms that have been subjected to a specified processing step are directly subjected to a drying process to reduce the moisture content to 20% or less (preferably 10% or less).

[0041] <How to make bamboo chips> As shown in Figure 1, in the bamboo chip production method, the culms of felled bamboo are dried and then crushed to produce bamboo chips. Specifically, first, the branches and leaves are removed from the felled bamboo to leave only the culm (the part of the bamboo that corresponds to the trunk of a tree and has alternating internodes and nodes in the longitudinal direction, also known as the bamboo culm. Hereinafter referred to as the "bamboo culm") (bamboo pre-treatment process).

[0042] After this bamboo pre-treatment process, the bamboo culms obtained in the bamboo pre-treatment process are split along their length, or a split is made along their length that penetrates from the surface of the culm to the internal cavity between the nodes (bamboo splitting process), thereby discharging the large amount of moisture contained in the vascular bundles of the bamboo culms and drying the bamboo culms (bamboo drying process).

[0043] By naturally drying split bamboo culms (also called "bamboo culm fragments") and bamboo culms with cracks (or fissures) (also called "cracked bamboo culms") in this way, these bamboo culms and bamboo culm fragments can be dried easily and in a short amount of time without the use of a dryer.In addition, when the bamboo culm fragments and bamboo culms are in this state, there is no need for a large amount of space to spread them out on flat ground and dry them in the sun, as is the case with bamboo chips.They can be dried in the sun or shade in a smaller area, which results in a reduction in the equipment costs required for the drying process.

[0044] Then, after the bamboo culms and bamboo culm fragments have been dried in a drying process until their moisture content is 20% or less, the bamboo culms (including bamboo culm fragments) are crushed in a crusher such as a chipper (bamboo crushing process), to produce bamboo chips, which are fine fibrous chip-like material with a set length of approximately 30 mm (although some may be longer than 30 mm, they generally include ones that are 50 mm or less in length; the same applies below).

[0045] <Soil and sand materials> The soil and sand material shown in Figure 2 includes all materials generally referred to as "soil and sand," specifically, decomposed granite soil, mountain sand, washed sand, residual soil, etc. The moisture content of this soil and sand material is not specifically set when producing bamboo mortar. Therefore, when carrying out the bamboo mortar production method, this soil and sand material does not need to be in a dry state, and it may be in a moist state.

[0046] However, when producing unhardened bamboo mortar, it is never desirable for the soil and sand material to have a high moisture content and be in an excessively wet state, and it is necessary to avoid the unhardened bamboo mortar becoming in an excessively wet state that would inhibit the properties suitable or required for its construction (properties suitable or required for the construction of unhardened bamboo mortar at the construction site, which means properties suitable for construction like mortar or mortar-based materials in terms of viscosity and fluidity, for example, properties including a paste-like or slurry-like state (hereinafter referred to as "construction fluidity"); the same applies below).

[0047] In other words, when producing unhardened bamboo mortar, it is assumed that if the application fluidity is insufficient, the necessary amount of water (hereinafter also referred to as "workability improving water") will be added as needed to impart application fluidity. However, for example, if the moisture content of the soil and sand is in an excessive moisture state, showing a higher fluidity (for example the fluidity of a liquid such as water or something similar) than the application fluidity of unhardened bamboo mortar and there is a risk of impeding the application fluidity, then such soil and sand with a high moisture content will not be eligible to be used as a soil and sand material for bamboo mortar.

[0048] <Solidified material> The solidification material contains cement as its main component (including cases where the solidification material is 100% cement), and the amount of this solidification material to be added is 10 to 20 parts by mass per 100 parts by mass of the dry mass of the soil and sand material, but more preferably, the standard amount to be added is 10 parts by mass per 100 parts by mass of the dry mass of the soil and sand material.

[0049] The solidification material contains cement as its main component, but since there is a possibility that the elution of hexavalent chromium from the cement hydrate may be suppressed, it is preferable to use blast furnace cement to which ground granulated blast furnace slag has been added as a countermeasure. In this way, even if the hydration reaction of the cement in the bamboo mortar is inhibited by the presence of bamboo chips, making it difficult for the cement hydrate to solidify, the elution of hexavalent chromium that would have been originally sealed in the cement hydrate by the blast furnace slag can be suppressed from the bamboo mortar.

[0050] <Workability improved water> As mentioned above, the workability improving water is the amount of water added as needed to make up for any moisture deficiencies in unhardened bamboo mortar, in order to ensure that unhardened bamboo mortar has the appropriate or necessary fluidity for application (including filling, spreading, paving, and other pouring; the same applies below) to the application site in the same way as regular cement mortar, and adjusts the moisture content of the unhardened bamboo mortar. Note that this workability improving water is not a factor that affects the performance of the bamboo mortar itself, but simply functions to ensure the ease of application of the bamboo mortar.

[0051] Here, the properties of unhardened bamboo mortar with application fluidity refer to properties that are suitable for application as a mortar or mortar-based material in terms of viscosity and fluidity, as described above, such as a paste or slurry state. Therefore, the necessary amount of workability improving water is added and adjusted so that the moisture content of such unhardened bamboo mortar is within the range of moisture content required for it to have application fluidity (hereinafter referred to as "within the appropriate moisture content range for application"; the same applies below).

[0052] Furthermore, since hardened bamboo mortar, which is made from unhardened bamboo mortar, does not need to be compacted like bamboo clay paving materials during construction, there is no need to adjust the moisture content of unhardened bamboo mortar to a level suitable for compaction, as is the case with bamboo clay paving materials.

[0053] Next, with reference to FIG. 2, the production method for the above-mentioned bamboo mortar will be described below.

[0054] <How to make bamboo mortar> As shown in Figure 2, according to the method for producing bamboo mortar, three main raw materials, soil and sand material, bamboo chips with a moisture content of 20% or less (5 to 10 parts by mass per 100 parts by mass of the dry mass of the soil and sand material), and 10 to 20 parts by mass of a solidification material containing cement (100 parts by mass of the dry mass of the soil and sand material) are added (adding process), and these are mixed to produce unhardened bamboo mortar (mixing process).This unhardened bamboo mortar is then applied to the application site (for example, by filling, spreading, paving, or otherwise pouring) (application process), and after application, the bamboo mortar is cured and hardened (curing process) to become hardened bamboo mortar (hardened bamboo mortar).

[0055] However, if the unhardened bamboo mortar lacks sufficient fluidity for application when it is produced, a process of adjusting the moisture content of the unhardened bamboo mortar to within the appropriate moisture content range for application (water addition adjustment process) is carried out by adding workability improving water before the mixing process (including during the adding process) or during the mixing process to bring the moisture content (moisture content) of the unhardened bamboo mortar within the appropriate moisture content range for application.

[0056] According to this method of producing bamboo mortar, the compaction process, which was an essential step in the construction of conventional bamboo soil pavement, is no longer necessary, and bamboo mortar (hardened bamboo mortar) can be easily produced by going through a mixing process to produce unhardened bamboo mortar, a construction process to apply the unhardened bamboo mortar, and a curing process to harden the applied unhardened bamboo mortar to produce cement hydrate and produce hardened bamboo mortar.

[0057] Both the unhardened bamboo mortar and hardened bamboo mortar produced in this way have the appearance of ordinary cement mortar (either an unhardened cement mortar made by homogeneously mixing sand, cement and water, or a hardened cement mortar made by hardening this cement mortar) with bamboo chips mixed in a homogeneous state.

[0058] In addition, the hardened bamboo mortar that was applied had a strength of 1000kN / m 2The strength of this mortar is about the same as that of ordinary cement mortar or concrete, and is therefore lower than that of ordinary cement mortar or concrete. Note that the term "ordinary cement mortar" used here refers to a mixture of sand as a soil material, cement as a solidification material, and water to ensure fluidity during casting, for example, 1 part by mass of water, 3 parts by mass of sand, and 6 parts by mass of cement.

[0059] Next, the premix material used to make bamboo mortar will be described below with reference to Figures 3 to 5. Figures 3 to 5 are flow charts showing a method for making bamboo mortar using the bamboo mortar premix material.

[0060] <Bamboo mortar premix material> Here, the above-mentioned bamboo mortar may be produced by preparing each of the three main raw materials separately and mixing them at the construction site, or it may be produced by preparing a premix material for producing unhardened bamboo mortar (hereinafter referred to as "bamboo mortar premix material") in which two or more of the three main raw materials mentioned above are mixed in advance, and then adding any missing main raw materials to this premix material to produce the unhardened bamboo mortar.

[0061] As shown in Figures 3 to 5, bamboo mortar premix is ​​a premix mixture for producing unhardened bamboo mortar. For example, there are "bamboo solid premix" (see Figure 3), which is a mixture of bamboo chips and hardening material mixed in advance, "bamboo solid soil premix" (see Figure 4), which is a mixture of bamboo chips, hardening material, and soil material mixed in advance, and "solid soil premix" (see Figure 5), which is a mixture of hardening material and soil material mixed in advance.

[0062] The amounts and moisture ratios of the main raw materials added to these premix materials are preset to the appropriate values ​​for producing bamboo mortar. Therefore, by adding the missing main raw materials to these premix materials in the appropriate amounts and moisture ratios (see ``Addition process'' in Figures 3 to 5), and then mixing these by stirring or the like (see ``Mixing process'' in Figures 3 to 5), it is possible to easily produce appropriate unhardened bamboo mortar.

[0063] For example, as shown in Figure 3, in the case of bamboo solid premix material, unhardened bamboo mortar can be easily produced by adding an appropriate amount of soil and sand, which is the main raw material that is lacking (addition process), and mixing it by stirring or the like (mixing process).

[0064] As shown in Figure 4, if the bamboo-solidified soil premix is ​​used, it can be easily mixed by stirring (mixing process) to produce unhardened bamboo mortar. Since all the main raw materials are already added, this bamboo-solidified soil premix has the advantage that it is not necessary to add these main raw materials, making it even easier to produce bamboo mortar.

[0065] However, if it is necessary to combine multiple bags of bamboo solid soil premix material, each packaged in a specified weight, to produce bamboo mortar, an addition process (not shown in Figure 4, see Figure 2) is required to combine and add the multiple bags of bamboo solid soil premix material.In this case, the multiple bags of bamboo solid soil premix material added in the addition process are mixed by stirring or other means to produce a homogeneous mixture (mixing process), and unhardened bamboo mortar is produced.

[0066] In addition, as shown in Figure 5, if a solid soil premix is ​​used, unhardened bamboo mortar can be easily produced by adding an appropriate amount of bamboo chips, which is the main raw material that is lacking (addition process), and mixing it by stirring, etc. (mixing process).

[0067] As a result, as shown in Figures 3 to 5, even when bamboo mortar is produced using bamboo mortar premix material, by adding the missing main raw materials to this bamboo mortar premix material (adding process), the soil material and bamboo chips with a moisture content of 20% or less are added in an amount of 5 to 10 parts by mass per 100 parts by mass of the dry mass of the soil material, and 10 to 20 parts by mass of solidification material containing cement are added per 100 parts by mass of the dry mass of the soil material, and unhardened bamboo mortar is produced by mixing this by stirring, etc. (mixing process).

[0068] As shown in Figures 3 to 5, even in the method of producing unhardened bamboo mortar using bamboo mortar premix materials, if the unhardened bamboo mortar lacks the application fluidity, workability improving water is added before the mixing process (including during the adding process) or during the mixing process to adjust the moisture content (moisture content) of the unhardened bamboo mortar so that it is within the appropriate moisture content range for application (water addition adjustment process).

[0069] <Example of bamboo mortar production method using bamboo mortar premix material> Next, an example of a method for producing bamboo mortar using bamboo mortar premix material will be described below.

[0070] In addition, even in the examples of the bamboo mortar production method using bamboo mortar premix materials described below, if the unhardened bamboo mortar lacks sufficient fluidity for application when it is produced, the necessary amount of workability-improving water will be added before the mixing process of the unhardened bamboo mortar (including during the adding process) or during the mixing process to adjust the moisture content of the unhardened bamboo mortar to within the appropriate moisture content range for application (water addition adjustment process).

[0071] First, if the bamboo solid premix is ​​a premix made by mixing 5 to 10 kg of bamboo chips with a moisture content of 20% or less and 10 to 20 kg of solidification material containing cement, this bamboo solid premix is ​​added to soil and sand material with a dry mass of 100 kg (addition process in Figure 3), and then mixed by stirring or other means until they are in a homogeneous mixture (mixing process in Figure 3), to produce 115 to 130 kg of unhardened bamboo mortar.

[0072] In addition, when the bamboo solid soil premix is ​​a premix made by mixing 100 kg of soil material with a dry mass, 5 to 10 kg of bamboo chips with a moisture content of 20% or less, and 10 to 20 kg of solidification material containing cement, technically this bamboo solid soil premix will become 115 to 130 kg of unhardened bamboo mortar as is. However, since this bamboo solid soil premix itself may be packed in bags in an insufficiently mixed state, in order to ensure quality, the bamboo solid soil premix is ​​mixed by stirring or other means until it becomes a homogeneous mixture (mixing process in Figure 4) before being used as unhardened bamboo mortar.

[0073] In addition, if the solid soil premix is ​​a premix made by mixing soil material with a dry mass of 100 kg with 10 to 20 kg of solidification material containing cement, 5 to 10 kg of bamboo chips with a moisture content of 20% or less are added to this solid soil premix (addition process in Figure 5), and then the mixture is mixed to a homogeneous state by stirring or other means (mixing process in Figure 5) to produce 115 to 130 kg of unhardened bamboo mortar.

[0074] <Effects of the bamboo mortar of this embodiment> The hardened bamboo mortar of this embodiment described above can be used as a substitute for conventional cement-based materials such as concrete and mortar, for example, as a substitute for concrete floors. Furthermore, while conventional concrete floors tend to have a simple, inorganic, and dull appearance, the hardened bamboo mortar can improve or enhance the appearance after construction by adding an accent to the bamboo chips contained therein.

[0075] Furthermore, the bamboo chips contained in the hardened bamboo mortar can make it similar to earth-based materials in terms of its appearance as well as its functions such as water absorption and water permeability. As a result, the hardened bamboo mortar has effective functions such as strength exceeding that of earth-based materials due to the cement hydrates, just like conventional concrete and cement mortar, but also has the appearance, water absorption, and drainage properties similar to those of earth-based materials. In particular, the bamboo chips contained in the hardened bamboo mortar exhibit a water absorption function, and these bamboo chips can absorb and release water supplied from the outside, so that the bamboo chips can be used to cool the material by utilizing the heat of vaporization of the water that enters and leaves the bamboo chips, which also contributes to heat island countermeasures.

[0076] Furthermore, the hardened bamboo mortar can be used as a substitute for conventional joint materials that use concrete or cement mortar. Conventional joint materials that use concrete or cement mortar tend to crack, and grass grows out of the cracks, making them look unsightly, but joint materials that use hardened bamboo mortar contain bamboo chips, and as a result, the bamboo fibers of the bamboo chips are mixed into the joint material, and the presence of these bamboo fibers prevents the joint material from cracking, thereby improving its weed-preventing function.

[0077] In addition, since the smoothness of the surface of the joint material made of hardened bamboo mortar is reduced by the presence of bamboo chips, it is preferable to first smooth the surface of the bamboo mortar joint material using leveling concrete or leveling mortar, and then install the secondary concrete product with this leveling concrete or leveling mortar in between. (*This paragraph was difficult to understand in Takanobu's email, so I have written here what I inferred from the contents of the email.)

[0078] Furthermore, at the joints between components such as secondary concrete products and joint material made of hardened bamboo mortar, there is a risk of poor jointing because the contact surface of the bamboo mortar with the secondary concrete product is difficult to smooth due to the unevenness caused by the presence of bamboo chips. Therefore, in such cases, it is preferable to use a mortar joint material such as cement mortar, which makes it easier and more feasible to smooth the contact surface with the secondary concrete product than bamboo mortar, at the joints between the secondary concrete product and the bamboo mortar. (※I found it difficult to understand the contents of Takanobu's email in this paragraph, so I have written here what I inferred from the contents of the email.)

[0079] Furthermore, the hardened bamboo mortar can be used as a substitute for the joint material and base material of the interlocking blocks often found on sidewalks. In this case too, it is possible to improve the crack prevention and weed control functions in the same way as in the case of the above-mentioned concrete floors, concrete joints, and cement mortar joints.

[0080] The hardened bamboo mortar can also be used as a substitute for gravel paving. This hardened bamboo mortar can be used to pave the gravel paving, making it possible for wheelchairs, which have had difficulty traveling on gravel roads up until now, to travel there.

[0081] Furthermore, pavements made from hardened bamboo mortar can be used as a substitute for pavements made from soil-based materials. For example, pavements made from soil-based materials such as improved soil made by mixing and solidifying soil and cement are prone to cracking and have low strength, but bamboo mortar contains bamboo chips, which allow bamboo fibers to be mixed into the interior, and the presence of these bamboo fibers increases the strength of the cement hydrate in the bamboo mortar, making it less likely to crack. This prevents cracking of the bamboo mortar pavement and improves its weed-preventing function, and furthermore, similar to pavements made from soil-based materials, it also has functions such as water absorption and permeability.

[0082] Furthermore, the hardened bamboo mortar can be used as a substitute for bamboo soil pavement. This bamboo mortar pavement does not require compaction, which is essential for bamboo soil pavement, so it can be poured and other construction work can be done even in places where compaction is difficult, such as narrow areas or sloping ground. In particular, since the construction of bamboo mortar requires only troweling the unhardened bamboo mortar, it is possible to create pavement even in places where compaction is difficult or impossible, such as narrow areas or sloping ground.

[0083] Moreover, since the hardened bamboo mortar contains bamboo chips made from bamboo, it is possible to reduce the carbon dioxide released into the atmosphere when the same amount of bamboo (culm) decays, and for example, 5% of the dry mass of the bamboo used as the bamboo chips can be fixed in the bamboo mortar. Furthermore, hardened bamboo mortar that is no longer needed can be crushed and added to new unhardened bamboo mortar as part of the soil material, making it easy to reuse.

[0084] The present invention has been described above based on an embodiment, but the present invention is not limited to the above embodiment, and it can be easily inferred that various improvements and modifications are possible within the scope of the present invention without departing from the spirit of the present invention.

[0085] For example, in the above embodiment, bamboo mortar, bamboo mortar molded products, bamboo mortar premix materials, and a bamboo mortar production method were described as embodiments of the bamboo mortar-related invention, but the embodiments of the bamboo mortar-related invention are not necessarily limited to these, and the bamboo mortar molding method shown in Figures 2 to 5 may be used to manufacture secondary products such as blocks and other precast materials.

[0086] For example, as shown in Figures 2 to 5, according to the bamboo mortar molding method, the unhardened bamboo mortar of the above embodiment is poured into a molding form used to manufacture secondary products such as blocks and other precast materials, and in this state, the cement contained in the solidifying material is allowed to hydrate and harden (cure), thereby molding the hardened bamboo mortar (molding process).The molded product of this bamboo mortar becomes a secondary product such as a block or other precast material.

Claims

1. Soil material; For every 100 parts by weight of the dry mass of the soil and sand material, 5 to 10 parts by weight of bamboo chips with a moisture content of 20% or less are used. The mixture is an unhardened mixture obtained by mixing 10 to 20 parts by mass of a solidification material containing cement with 100 parts by mass of the dry mass of the soil and sand material, Or, This bamboo mortar is characterized in that the unhardened mixture is made by adding workability improving water to the unhardened mixture in order to impart workability to the mixture when the workability is insufficient.

2. Soil material; For every 100 parts by weight of the dry mass of the soil and sand material, 5 to 10 parts by weight of bamboo chips with a moisture content of 20% or less are used. A hardened product obtained by mixing 100 parts by mass of the soil and sand material with 10 to 20 parts by mass of a solidification material containing cement with respect to the dry mass of the soil and sand material, The hardened product is hardened by the hydration reaction of the cement contained in the solidification material, and the bamboo chips are present in the hardened product, making this bamboo mortar.

3. A cured product obtained by curing the uncured mixture according to claim 1 or 2 in a state where the uncured mixture is placed in a mold, The hardened product is hardened by the hydration reaction of the cement contained in the solidification material, the bamboo chips are present in the hardened product, and the bamboo mortar molding is a molded product formed using the formwork.

4. A method for mixing with soil and gravel material to produce the unhardened mixture according to claim 1 or 2, For every 100 parts by weight of the dry mass of the soil and sand material, 5 to 10 parts by weight of bamboo chips with a moisture content of 20% are used. A bamboo mortar premix material characterized in that it is a premix mixture obtained by mixing 100 parts by mass of the dry mass of the soil and sand material with 10 to 20 parts by mass of a solidification material containing cement.

5. To produce the uncured mixture according to claim 1 or 2, Soil material; For every 100 parts by weight of the dry mass of the soil and sand material, 5 to 10 parts by weight of bamboo chips with a moisture content of 20% or less are used. A bamboo mortar premix material characterized in that it is a premix mixture obtained by mixing 100 parts by mass of the dry mass of the soil and sand material with 10 to 20 parts by mass of a solidification material containing cement.

6. Soil material; For every 100 parts by weight of the dry mass of the soil and sand material, 5 to 10 parts by weight of bamboo chips with a moisture content of 20% or less are used. 10 to 20 parts by mass of a solidification material containing cement relative to 100 parts by mass of the dry mass of the soil and sand material; an adding step of adding it as a main raw material; This method for producing bamboo mortar is characterized by comprising a mixing process in which the soil and sand material, bamboo chips and solidification material added in the adding process are mixed to produce an unhardened mixture.

7. Soil material; For every 100 parts by weight of the dry mass of the soil and sand material, 5 to 10 parts by weight of bamboo chips with a moisture content of 20% or less are used. 10 to 20 parts by mass of a solidification material containing cement relative to 100 parts by mass of the dry mass of the soil and sand material; a mixing step to produce a mixture in an uncured state; A construction process of applying the unhardened mixture produced by the mixing process to a construction site; This bamboo mortar production method is characterized by including a curing process in which the unhardened mixture applied in the application process is hardened by the hydration reaction of the cement, thereby producing hardened bamboo mortar in which the bamboo chips are present in the cement hydrate.

8. A method for producing bamboo mortar, characterized in that it includes a water-adding and adjusting process for adding workability-improving water before or during the mixing process described in claim 6 or 7 to give the unhardened mixture mixed by the mixing process workability.

9. Soil material; For every 100 parts by weight of the dry mass of the soil and sand material, 5 to 10 parts by weight of bamboo chips with a moisture content of 20% or less are used. 10 to 20 parts by mass of a solidification material containing cement relative to 100 parts by mass of the dry mass of the soil and sand material; a mixing step to produce a mixture in an uncured state; This bamboo mortar molding method is characterized by including a molding step in which the unhardened mixture produced in the mixing step is poured into a formwork and hardened by the hydration reaction of the cement, thereby producing a hardened bamboo mortar molded product in which the bamboo chips are present in the cement hydrate.

10. A bamboo mortar molding method characterized in that it includes a water-adding and adjusting process for adding workability-improving water before or during the mixing process described in claim 9 to give the unhardened mixture mixed by the mixing process workability.

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