JP2012158509A - Low alkaline cement composition-filled bamboo composite member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a circulation type building material which can be used as a building material by filling a low alkaline cement composition between bamboo joint walls to impart sufficiently durable strength as a building member, and by opening a mortise on a joint between each joint of members and using a curl plug and a wood screw, and which can be dismantled easily and reused as a fertilizer or an aggregate when being crushed.SOLUTION: The low alkaline cement composition contains light-burned magnesia, silica fume and mountain sand as main components, and a composition obtained by adding a phosphate to a reactant and kneading it with water is filled into a space between bamboo joint walls, to thereby become usable as a building material requiring strength capable of showing a remarkably higher numerical values in bending strength or compressive strength in comparison with an unfilled bamboo material. Further, a mortise can be opened on a joint between each low alkaline cement composition-filled bamboo composite member, and a curl plug and a wood screw can be used, to thereby become easily fixable and easily detachable when being detached, and to obtain a bamboo composite member as a circulation type building material which is easily reusable and sortable.

Description

The present invention relates to a building material for a composite member in which bamboo joints are filled with a low alkali cement composition.

Conventionally, as a building material using bamboo, many are known which are made by press-molding bamboo and using bamboo as a reinforcing material for concrete.

JP2007-4074 JP 7-217055 JP 10-205065 A

However, all of these conventional bamboo building materials are made into bamboo chips. By fiberizing. Addition of synthetic resin emulsions to prevent the appearance of bamboo from losing its appearance or to prevent hardening of cement by soluble sugars and resins contained in bamboo because Portland cement is used. It was necessary to remove sugars and resins by adding oils and fats or boiling chips and fibers. In addition, strong alkaline solidifying agents such as Portland cement can burn and reuse incinerated ash as part of the roadbed material even if the parts are reused, but most of them are landfilled at the final disposal site. Is the current situation. Since the method of joining the members uses metal nails and bolts, it takes a lot of time to separate and dismantle, so it is incinerated without being reused. In recent years, bamboo has not been used effectively due to the decline of the bamboo industry, and because of its growth potential, bamboo erodes satoyama one after another, hindering the growth of other trees and causing landslides. Causing a situation called "harm".

The present invention can be used in a site requiring strength, and by filling the bamboo joint space with a low alkali cement composition, when disassembling and separating, the filled composite member is pulverized to obtain fertilizer and re-aggregate. Available. It is possible to firmly fix the curl plug with a wood screw after making a hole in the joint part. By removing the wood screws when sorting, much time is required and reuse can be expanded.
Of course, it can also be tied with a binding band or string.
Examples of the low alkali cement of the present invention include magnesia cement, magnesia phosphate cement, alumina cement, silica alumina cement, phosphosilicate magnesia cement, and jet cement. Preferably, magnesia phosphate cement can be reused as a fertilizer. The bamboo material of the present invention is not limited to the kind of bamboo such as 孟 mune bamboo or true bamboo.
The composition of the present invention is characterized by mixing silica fume, fly ash incineration ash and volcanic ash with the magnesia phosphate. In addition, the inorganic aggregate is characterized by mixing at least one of mountain sand, river sand, glass powder, and ceramic waste, but the inorganic aggregate is not limited.
The magnesia of the present invention is preferably a calcined product of 700 ° C. to 900 ° C., such as light-burned magnesia (eg, Chinese magnesite) or seawater magnesia using bittern in seawater.
The average particle size is preferably 0.01 mm to 0.5 mm.
The silica fume of the present invention is not particularly limited as long as it is a fine inorganic substance such as silica flower (trade name 971-u manufactured by Elchem Co.) or coal ash (liash).
The sand of the present invention uses mountain sand (particle size: 0.1 mm to 1 mm), but is not particularly limited. The phosphate of the present invention is used as a reaction solidifying agent, but is characterized by using water-soluble phosphate fertilizer powder.
As water-soluble phosphoric acid powder, superphosphate lime, heavy superphosphate lime, Thomaslin fertilizer, soluble phosphorous fertilizer, and potassium hydrogen phosphate II can be used, but are not limited thereto. In the low alkali cement composition of the present invention, a water reducing agent, a retarder, a curing accelerator, an antifoaming agent, an emulsion resin powder, and a water-soluble polymer can be appropriately added.

Bamboo building materials can be used for members that require strength, so that bamboo waste materials can be used, and can be used for detached houses, temporary houses, huts, and temporary toilets.

It is the figure which joined the composite member which filled the bamboo joint wall space with the low alkali cement composition. It is the figure which filled the bamboo knot wall space with the low alkali cement composition It is a figure in which the core material is similarly contained in the member which filled the bamboo joint wall space with the low alkali cement composition. It is the figure which filled the half-bamboo joint wall space with the low alkali cement composition It is the figure which filled the bamboo knot wall space with the low alkali cement composition and tightened the circumference of the bamboo with the binding band

A mixture of 100 parts by weight of light-burned magnesia (made in China), 30 parts by weight of lime superphosphate, 10 parts by weight of silica fume (trade name 971-u manufactured by Elchem Co.), and 2 parts by weight of Mighty 1000 is (A) (A ) 100 parts by weight of river sand (0.5 mm or less) and 200 parts by weight of water and kneaded are defined as (B). Leave the bamboo section wall of the thickest bamboo part and remove all other section walls. The round bamboo may be removed after halving, or the bamboo knot wall may be removed. This is a composite member in which (B) is filled in the bamboo knot wall space.

According to claim 1 of the present invention, {FIG. 1} is a form in which bamboo composite members are joined to each other, and a curl plug is used in a horn joint part and is secured with a wood screw.

According to claim 2 of the present invention, {FIG. 2} is a form in which the low alkali cement composition (B) is filled in the bamboo nodal wall space.

According to claim 3 of the present invention, {FIG. 3} is a form in which a bamboo composite member is similarly inserted as a core material into a member filled with a low alkali cement composition (B) in a bamboo knot wall space.

According to claim 4 of the present invention, {FIG. 4} is a form in which a bamboo knot wall space of half-split bamboo is filled with a low alkali cement composition (B).

According to claim 5 of the present invention, {FIG. 5} is a form in which the low alkali cement composition (B) is fastened to the form of claim 1 with a binding band (strings are allowed) around the bamboo.

Next, the bending test of the bamboo composite member in which the present invention is filled with the low alkali cement composition (B) in the bamboo knot wall space will be specifically described with reference to a comparative example.

A mixture of 10 parts by weight of silica fume (trade name 971-U, manufactured by M-Chem Co., Ltd.), 2 parts by weight of Mighty-1000, and 30 parts by weight of lime perphosphate is added to 100 parts by weight of Chinese light-burned mahnesia (80-120 mesh). (A) (A) 200 parts by weight of sand (0.5 mm under) and 100 parts by weight of water and kneaded are referred to as (B). (B) is poured into a polyethylene mold 28. The pH of water obtained by subjecting the solidified product removed from the mold after natural curing for 28 days to water curing for 28 days was 8.8.

A mixture of 10 parts by weight of silica fume (manufactured by M-Chem Co., Ltd.), 30 parts by weight of lime superphosphate and 2 parts by weight of Mighty-1000 in 100 parts by weight of light-burned magnesia (80-120 mesh) from China And (A) added with 200 parts by weight of mountain sand and 100 parts by weight of water and kneaded, and (B) was changed to (1). 49.8cm in diameter, 2) 48.3cm in diameter 15cm in length, filled with bamboo bamboo space with one node wall, and naturally cured for 28 days, span 10cm, crosshead speed 10mm / A bending test was performed at s. Saitama Industrial Technology Center, Shimadzu Corporation AG-100KN) Use result (1) 96.4kg / cm2, (2) 87.3kg / cm2 For comparison (B) not filled (3) Diameter 46.7cm (4) ▼ System 48.3 cm Length was 15 cm and the bending test was conducted in the same manner. The result was (3) 35.1 kg / cm 2 (4) 40.8 kg / cm 2.

A mixture of 10 parts by weight of Chinese light-burned magnesia (80-120 mesh) and 10 parts by weight of silica fume chem), 30 parts by weight of heavy superphosphate lime, and 2 parts by weight of Mighty-1000 is (A). A mixture obtained by adding 250 parts by weight of sand and 150 parts by weight of water to (A) and kneading is defined as (B), and (B) is changed to (1). 50.3cm in diameter, (2) 49.3cm in diameter 15cm long round bamboo filled into the bamboo knot space leaving one knot wall and allowed to grow naturally for 28 days, span 10cm, crosshead speed 10mm / A bending test was performed at s. Saitama Industrial Technology Center, Shimadzu AG-100KN) Use result (1) 120.4kg / cm2, (2) 114.5kg / cm2 For comparison (B) not filled (3) Diameter 49.6cm (4) ▼ Introduction system 49.7cm The length was 15cm and the bending test was carried out in the same manner. The result was (3) 45.1 kg / cm 2 (4) 50.2 kg / cm 2

Claims (5)

According to FIG. 1, a bamboo composite member in which a low pitch cement composition 1 is filled in a bamboo knot wall space, a tenon hole is drilled, the other bamboo composite member 6 is inserted, a curl plug 5 is buried, and a wood screw 4 is secured. A bamboo composite member in which the bamboo alkali wall space is filled with the low alkali cement composition 1 according to FIG. According to FIG. 3, the bamboo composite member in which the low alkali cement composition 1 of the core material 5 is filled in the bamboo composite member in which the bamboo knot wall space is filled with the low alkali cement composition 1. A bamboo composite material in which the low alkali cement composition 1 is filled in the bamboo bamboo wall of the half-bamboo according to FIG. A bamboo composite member in which the low alkaline cement composition 1 is filled in the bamboo knot wall space according to FIG. 5 and bound to the outer periphery of the bamboo composite member with a binding band, string 7 or the like

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