JP7387657B2 - Lightweight freestanding walls and construction methods for lightweight freestanding walls - Google Patents

Description

Application of Article 30, Paragraph 2 of the Patent Act List of construction records Construction date January 23, 2020 Property name Harihara Musashinokai Residence 173-2 Tonohiraga, Matsudo City, Chiba Prefecture 89 other locations As shown in Attachment 1 and Attachment 2

The present invention relates to a lightweight self-supporting wall formed by installing a plurality of lightweight panels side by side, a cement composition filled between the lightweight panels, and a construction method for the lightweight self-supporting wall.

When used as a free-standing wall, lightweight panels are lightweight, making them difficult to collapse, and since they are easy to process, they can be easily constructed into curved free-standing walls, so they can be used as a free-standing alternative to conventional concrete blocks. It is being used for walls. Patent Document 1 describes a lightweight self-supporting wall that is formed by joining lightweight panels together by placing reinforcing bars in the gaps between the lightweight panels and filling them with mortar slurry. There is.

JP2020-029759A

In conventional lightweight self-supporting walls, a slurry of mortar that connects the lightweight panels is filled into the gaps between the lightweight panels and is cured to join the lightweight panels together. However, conventional lightweight self-supporting walls do not take into consideration the ability of mortar slurry to fill the gaps between the lightweight panels that are connected together, resulting in poor filling ability of slurry into the gaps and poor workability during construction. There was a problem.

The present invention solves the above-mentioned problems, and aims to provide a lightweight self-supporting wall with excellent workability during construction.

The lightweight self-supporting wall according to the present invention includes a plurality of lightweight panels that are erected by joining horizontally adjacent panels to each other,
cutout recesses along the vertical direction provided on the butt surfaces of the lightweight panels;
a through hole formed from the opposing notch recesses by butting the lightweight panels;
a plurality of support members inserted into the through hole and erected at intervals on a foundation site on which the lightweight panel is installed;
A lightweight self-supporting wall comprising: a bonded cement molded product filled in the through hole and hardened;
The bonding cement composition forming the bonded cement molding is a composition in which 100 parts by mass of a cement-based non-shrinkage grout material, 20 to 100 parts by mass of cement, and 100 to 200 parts by mass of silica sand No. 6,
The slurry of the cement composition is characterized in that the flow value obtained in accordance with JASS15M-103 is 125 to 250 mm.

According to the lightweight self-supporting wall of the present invention, by butting the lightweight panels against each other during construction, a through hole is formed from the opposing notch recesses. Since the flow value obtained according to JASS15M-103 of the slurry of the bonding cement composition to be filled into the through holes is 125 to 250 mm, the slurry of the bonding cement composition has appropriate fluidity and is filled with the through holes. can be easily filled. Therefore, the workability during construction can be excellent. Furthermore, since the slurry of the cement composition has appropriate fluidity, it can be easily filled into the through holes. Therefore, the workability during construction can be excellent.

Further, in the above lightweight self-supporting wall, the lightweight panel may be made of polystyrene foam (EPS (expandable polystyrene beads)) with an expansion ratio of 30 to 60 times.

According to this, the size of the lightweight panel can be easily adjusted, and the size of the lightweight self-supporting wall formed from the lightweight panel can be freely set.

Further, the method for constructing a lightweight self-supporting wall according to the present invention includes a drilling step of providing a plurality of embedding holes in which supporting members for reinforcing the lightweight self-supporting wall are buried in a foundation site on which the lightweight self-supporting wall is to be constructed;
an erecting step of vertically erecting the support member by filling each of the buried holes with a slurry of a fixed cement composition that fixes the support member;
Lightweight panels each having a notched recess extending in the vertical direction on their abutting surfaces are installed between the plurality of upright support members, and a penetration formed from the facing notched recess between the installed lightweight panels is provided. an installation step of inserting the support member into the hole;
A filling step of filling the through hole with a slurry of a bonding cement composition in which 100 parts by mass of a cementitious non-shrinkage grout, 20 to 100 parts by mass of cement, and 100 to 200 parts by mass of silica sand No. 6 are mixed. have,
The slurry of the cement composition is characterized in that the flow value obtained in accordance with JASS15M-103 is 125 to 250 mm .

According to the construction method of the lightweight self-supporting wall of the embodiment, through-holes are formed between the lightweight panels, and the slurry of the bonding cement composition that fills the through-holes has appropriate fluidity, which improves workability. It can be made into an excellent one.

In addition, the above-mentioned method for constructing a lightweight self-supporting wall includes, as a pre-process to the filling process, an embedding process of embedding caulking material or a supplementary panel and caulking material between the lightweight panels. be able to.

According to this, it is possible to fill the gaps between lightweight panels, that is, the gaps in the through holes, thereby preventing the slurry of the bonding cement composition from leaking when filling the through holes with the slurry of the bonding cement composition. be able to.

Further, in the above method for constructing a lightweight self-supporting wall, the lightweight panel may be made of polystyrene foam (EPS (expandable polystyrene beads)) with an expansion ratio of 30 to 60 times.

According to this, the size of the lightweight panel can be easily adjusted, and the size of the lightweight self-supporting wall formed from the lightweight panel can be freely set.

According to the present invention, it is possible to provide a lightweight freestanding wall with excellent workability during construction.

FIG. 1 is a perspective view of a lightweight freestanding wall according to an embodiment of the present invention. It is a plan view of the same lightweight self-supporting wall in the middle of construction. FIG. 2 is a plan view of a lightweight self-supporting wall in the middle of construction when there is a gap between lightweight panels.

Hereinafter, embodiments of the lightweight self-supporting wall according to the present invention will be described. The meanings of each term in this specification and claims are as follows.

(Joining or Fixing) A cement composition is a powder-like material in which cement, aggregate, and other additives are uniformly mixed. When a cement composition is kneaded with water, it becomes a fluid slurry (paint) that can be coated or filled. When the cement in the slurry is hardened by a hydration reaction, the slurry of the cement composition becomes a cement molded product as a hardened body.

In the lightweight self-supporting wall of the embodiment, cutout recesses 23 along the vertical direction are formed in the abutting surfaces 22 of the plurality of lightweight panels 21 to be joined, and by butting the lightweight panels 21 against each other, the lightweight panels 21 are faced to each other. A through hole 24 is formed from the cutout recess 23 . A support member 51 erected from the base portion 11 is inserted into the through hole 24 and filled with a slurry of a cement composition. The slurry of the bonding cement composition has a flow value of 125 to 250 mm in accordance with JASS15M-103 , so it has appropriate fluidity and can easily fill the through holes 24, making it easy to install. It is designed to have excellent workability at times.

For the lightweight panel 21, polystyrene foam (EPS (expandable polystyrene beads)) that can be easily molded by bead foaming is used, and has a thickness of 150 mm and a foaming ratio of 50 times . Since the lightweight panel 21 can be easily cut with a cutter knife or the like, the size of the lightweight panel 21 can be easily adjusted. Therefore, the size of the lightweight self-supporting wall formed from the lightweight panels 21 can be freely set.

As shown in FIG. 2, the lightweight panel 21 is provided with a cutout recess 23 extending in the vertical direction on a butting surface 22 that joins the lightweight panels 21 together. Thereby, by butting the lightweight panels 21 against each other, the opposing notch recesses 23 are closed in the circumferential direction by the lightweight panels 21, and a through hole 24 made of the notch recesses 23 is formed. A support member 51, which will be described in detail later, is inserted into the through hole 24, and is filled with a slurry of a bonding cement composition forming a bonded cement molded product 31.

The notch recess 23 was sized to be easily filled with the slurry of the bonding cement composition forming the bonded cement molded article 31, and had a width W in the thickness direction of 50 mm and a depth D in the surface direction of 50 mm.

As the support member 51, an L-shaped angle made of iron with a side length of 50 mm was used. As shown in FIG. 1, the support member 51 is placed in a buried hole 12 provided in the foundation part 11 on which the lightweight panel 21 is installed, so that the oblique side connecting both ends of the L-shaped angle in the cross section in the short direction is the lightweight panel to be installed. It is fixed with a fixing cement composition described below so as to be parallel to the lateral direction of the panel 21 and perpendicular to the base portion 11. Note that the foundation portion 11 is a concrete molded product provided on the ground.

The cement composition used was a blend of cement-based non-shrinkage grout material, cement and aggregate. With cement-based non-shrinkage grout, the slurry has high fluidity and there is a risk that the slurry will leak from the gaps between the lightweight panels 21, so the fluidity of the slurry was reduced by blending cement and aggregate. It is something. Further, the bonding cement composition maintains the non-shrinkage property of a cement-based non-shrinkage grout material, and there is almost no shrinkage when the slurry of the bonding cement composition is filled into the through holes 24 and hardened. Therefore, a gap due to shrinkage does not occur between the bonded cement molded product formed from the slurry of the bonded cement composition and the through hole 24, and it is possible to prevent rainwater from entering the lightweight self-supporting wall. .

Any commercially available cement-based non-shrink grout can be used as the cement-based non-shrink grout. Commercially available cement-based non-shrinkage grout materials include U-Grout for general use, U-Grout RS, U-Grout RP (manufactured by Ube Industries Kenzai Co., Ltd.), Preeurox (general use), and Preeurox M. (low heat generation type), Preeurox LH (shrinkage reduction type), Preeurox GC (simple concrete type with pea gravel mixed), Preeurox Super (quick hardening type), Preeurox Super TYPE-10, Preeurox Pad (for hard kneaded pads), Preeurox HW (heavy mortar), Preeurox S (high strength type), Preeurox MS (high strength type), Preeurox UHS (ultra high strength type), Preeurox Rox LC-MIX (underwater non-separable type), Eurox cement (slurry type for small gaps), Eurox (admixture type), J-flow KR2 (lightweight type), J-flow KR2 dust reduction type (dust reduction type, lightweight) type), Preeurox LW30 (lightweight type) (manufactured by Taiheiyo Materials Co., Ltd.), non-shrink light grout, non-shrink high grout, non-shrink HS80, non-shrink HS100, non-shrink ST3000-G, non-shrink grout premix , Non-shrink grout standard, Non-shrink light grout M (manufactured by ABC Shokai Co., Ltd.), Pretascon TYPE-1, Pretascon TYPE-1R (manufactured by Denka Co., Ltd.), JS grout (general use) (Japan Stucco Co., Ltd.) (manufactured by Tokuyama Mtec Co., Ltd.), grout mix (manufactured by Tokuyama Mtec Co., Ltd.), etc.

Portland cement (ordinary Portland cement) specified in JIS R 5210:2019 was used as the cement, and commercially available silica sand was used as the aggregate.

The blending ratio of the bonding cement composition is: cement-based non-shrinkage grout material: 100, ordinary Portland cement: 50, silica sand: 150, and the flow value of the slurry of the bonding cement composition is 125 to 125. Adjust the amount of water added so that it becomes 250 mm. More preferably, the amount of water added is adjusted so that the flow value of the slurry of the cement composition is 150 to 200.

The fixed cement composition used was a blend of cement-based non-shrinkage grout material, cement and aggregate. The cementitious non-shrink grout, cement and aggregate are the same cementitious non-shrink grout, cement and aggregate used in the cementitious composition.

The mixing ratio of the fixed cement composition is: cement-based non-shrinkage grout material: 100, ordinary Portland cement: 50, silica sand: 150, and the flow value obtained in accordance with JASS15M-103 of the slurry of the fixed cement composition is 125 ~ Adjust the amount of water added so that it becomes 250 mm. More preferably, the amount of water added is adjusted so that the flow value of the slurry of the fixed cement composition is 150 to 200.

The construction method of the lightweight self-supporting wall of the embodiment includes a drilling step of providing a buried hole 12 in a foundation part 11, and an erection step of filling the buried hole 12 with a slurry of a fixed cement composition and erecting a supporting member 51. , an installation step of installing the lightweight panels 21 between the supporting members 51, a seaming step of applying seam reinforcement between the installed lightweight panels 21, and a slurry of a bonding cement composition in the through holes 24 between the lightweight panels 21. The filling process was performed in this order.

In the hole punching process, a plurality of embedding holes 12 for burying supporting members 51 for reinforcing the lightweight self-supporting wall were made using a φ100 mm vibration drill at the locations of the existing or newly constructed foundation site 11 where the lightweight self-supporting wall was to be installed. The embedding holes 12 were provided at any interval of 1000 mm or less, and the depth of the embedding holes 12 was 220 mm. Note that if the lower limit of the interval between the buried holes 12 is determined, it is 100 mm or more.

In the erecting process, an L-shaped angle with a side length of 50 mm is placed in each buried hole 12 as a support member 51, and the light-weight panel 21 is installed with the oblique side connecting both ends of the L-shaped angle in cross section in the short direction. (FIG. 2) and perpendicular to the foundation part 11 in each burial hole 12, and then a slurry of the fixing cement composition is placed in the burial hole 12. Filled.

In the installation process, after the slurry of the fixed cement composition was hardened and the support members 51 were erected, the lightweight panels 21 were installed between the support members 51, respectively. Since the lightweight panel 21 is provided with notched recesses 23 along the vertical direction on the abutting surface 22, when the lightweight panel 21 is installed, the through holes 24 are formed from the respective notched recesses 23 on the abutting surface 22 of the lightweight panel 21. is formed. Since the two lightweight panels 21 are installed with the support member 51 in between, the support member 51 is inserted into the through hole 24 formed from the cutout recess 23 . A silicone caulking material 25 was applied to the abutting surfaces 22 between the lightweight panels 21 to bond the lightweight panels 21 together. Further, a caulking material 25 was also applied between the lightweight panel 21 and the foundation portion 11 to bond the lightweight panel 21 and the foundation portion 11 together. As a result, the gaps between the lightweight panels 21 are filled with the caulking material 25, and the gaps in the through holes 24 are filled up and down.

In the covering process, as shown in FIG. 2, in order to prevent the slurry of the cement composition to be filled in the next filling process from flowing out from the weakly bonded areas of the caulking material 25, a fabric adhesive is placed between the lightweight panels 21. A reinforcing tape 62 such as tape was attached. Next, a plate-shaped shoring material 63 that prevents the upper end side of the through hole 24 from opening was brought into contact with both widths of the upper end portion spanning between the lightweight panels 21, and fixed with a clamp (not shown). .

In the filling step, the through holes 24 were filled with a slurry of the bonding cement composition. The amount of water added to the slurry of the joint cement composition was adjusted so that the flow value was 125 to 250 mm. Since the slurry of the cement composition having a flow value of 125 to 250 mm has appropriate fluidity, it can be easily filled into the through holes 24. Therefore, the lightweight self-supporting wall of the embodiment can have excellent workability during construction. The slurry of the bonded cement composition hardens to form a bonded cement molding 31, forming a lightweight free-standing wall.

After the filling process, it is confirmed that the slurry of the bonding cement composition has hardened and the bonded cement molded article 31 has been molded, and the auxiliary materials such as the reinforcing tape 62 and the shoring material 63 are removed, and the lightweight self-supporting wall is coated with paint, etc. A decorative process for applying decorative materials can be provided. The decorative process consists of a base adjustment process for adjusting unevenness of the lightweight self-supporting wall (lightweight panel 21), and a finishing process for applying decorative materials, which is performed after the base adjustment process.

In the base preparation process, the surface of the lightweight freestanding wall (lightweight panel 21) is covered with a glass fiber mesh, and a cement-based base preparation material is applied over the entire surface using a plastering trowel from above the glass fiber mesh (surface side), and the glass fiber Embed the mesh in cement-based ground preparation material. By embedding glass fiber mesh in cement-based ground preparation material, the strength of lightweight free-standing walls can be increased.

In the finishing process, by applying paint or a decorative sheet that is applied to the exterior walls of a building to the light-weight free-standing wall that has been prepared as a base, it is possible to impart beauty and weather resistance to the light-weight free-standing wall. Paint and decorative sheets are applied in accordance with the standard construction specifications for the paints and decorative sheets to be used.

Hereinafter, the present invention will be explained in more detail with reference to Examples. The composition etc. of the joint cement composition and the performance evaluation results are shown in Tables 1 and 2, respectively. The composition of the joint cement composition was described in mass ratio. In the table, Test Examples 1 to 9 are Examples, and Test Examples 10 to 12 are Comparative Examples.

Abbreviations are used for some of the names of raw materials in the table. The raw materials used are listed below with the general name or raw material name in parentheses.

Grout material A (Preeurox Super (cement-based non-shrinkage grout material manufactured by Taiheiyo Materials Co., Ltd.))
Grout material B (U-grout for general use (cement-based non-shrinkage grout material manufactured by Ube Industries Kenzai Co., Ltd.))
Grout material C (non-shrink light grout (cement-based non-shrink grout material made by ABC Shokai Co., Ltd.))
Cement (ordinary Portland cement (JIS R 5210:2019))
Aggregate (silica sand No. 6 (average particle size (d50): approx. 0.37 mm))
Commercially available products were used for these.

The joint cement compositions of these test examples were tested for the following evaluation items.

(1) Flow value (mm)
As the flow test value (mm), the flow value obtained in accordance with JASS15M-103 "Quality Standards for Self-Leveling Materials" was determined. A vinyl chloride pipe (inner volume 196 mL) with an inner diameter of 50 mm and a height of 100 mm was placed on a 5 mm thick polished plate glass, and after filling it with cement composition slurry, the pipe was pulled up and the spread of the slurry was stopped. The diameters in two perpendicular directions were measured, and the average was taken as the flow value (mm). The amount of kneading water was the sum of the standard amount of water added to the grout and the amount of water added to the cement (mass of cement x 0.5).

(2) Fillability Test The fillability test confirmed the workability when filling the through holes 24 with slurry of the cement composition. ○ indicates that the cement composition slurry has excellent fluidity and is easy to fill; △ indicates that the slurry has poor fluidity and is difficult to fill; △ indicates that the slurry has poor fluidity and is difficult to fill. A sample with too high fluidity and excellent filling workability but with a risk of flowing out from the joints of the lightweight panel 21 was graded with a grade of x (B).

(3) Material Cost The material cost was evaluated by comparing the bonding cement composition with that of the cement-based non-shrink grout material based on the cost per unit mass. Then, those that were cheaper than cement-based non-shrinkage grout materials were evaluated as ○, those that were equivalent (within ±5%) were evaluated as △, and those that were more expensive were evaluated as ×.

(Test Example 1 to Test Example 3)
Test Examples 1 to 3 are test examples in a preferable range, and Test Example 1 is a test example in the best mode. These products received excellent evaluations in all evaluation items.

(Test Example 4 to Test Example 6)
In Test Examples 4 to 6, the amount of aggregate added was increased or decreased from Test Example 1. Note that Test Example 5 is the same as Test Example 1. Test Example 6, in which the blended amount of aggregate was increased, had slightly poor fluidity and slightly poor filling workability.

(Test Example 7 to Test Example 9)
In Test Examples 7 to 9, the blended amount of cement was increased or decreased from Test Example 1. Test Example 7, in which the blended amount of cement was reduced, had slightly poor fluidity and somewhat poor filling workability.

(Test Example 10 to Test Example 12)
Test Examples 10 to 12 used cement-based non-shrinkage grout materials mixed with a standardized amount of water. Although these had too high fluidity and were excellent in filling workability, there was a risk that they would flow out from the joints of the lightweight panel 21.

Note that the lightweight self-supporting wall of the embodiment can be implemented even if its configuration is changed to the following form.

In the lightweight self-supporting wall of the embodiment, polystyrene foam (EPS), which can be easily molded by bead foaming, is used as the lightweight panel 21, but any lightweight panel can be used. Polymer foams and inorganic foams can be used as materials for lightweight panels. As the polymer foam, polystyrene foam, polyurethane foam, polyphenol foam, polyolefin foam (polyethylene foam, polypropylene foam), etc. can be used. As the inorganic foam, aluminum hydroxide foam (Talbocell), cement foam (ALC (autoclaved lightweight aerated concrete)), etc. can also be used.

In the lightweight self-supporting wall of the embodiment, the lightweight panel 21 used has an EPS foaming ratio of 50 times, but if the foaming ratio is 30 to 60 times, it can be used as the EPS of the lightweight panel 21. can. When EPS has a foaming ratio of less than 30 times, a large amount of resin (beads) is required, which may be uneconomical. On the other hand, when EPS has a foaming ratio of more than 60 times, the strength is low and there is a risk of plastic deformation when subjected to impact. More preferably, the expansion ratio of the EPS is 40 to 55 times.

Although the cutout recess 23 provided in the lightweight panel 21 of the embodiment has a width W in the thickness direction of 50 mm and a depth D in the surface direction of 50 mm, the width W and the depth D should each be 30 to 100 mm. Can be done. This is because if the width W and the depth D are 30 to 100 mm, the through hole 24 formed by the cutout recess 23 can be easily filled with the slurry of the bonding cement composition forming the bonded cement molded article 31. If the width W and the depth D are each less than 30 mm, the through hole 24 may be narrow and the filling performance of the slurry of the cement composition may be poor. On the other hand, when the width W and the depth D each exceed 100 mm, although the filling property of the slurry of the bonding cement composition is excellent, the amount of the bonding cement composition used increases, which may be uneconomical. More preferably, the width W and the depth D are each 40 to 90 mm, and even more preferably 50 to 80 mm. Note that the width W can also be changed depending on the thickness of the lightweight panel 21. When the cover thickness in the thickness direction of the lightweight panel 21 (the thickness from the surface of the lightweight panel 21 to the notch recess 23) is 35 mm, in the lightweight panel 21 with a thickness of 120 mm, the width W can be 50 mm, and the thickness For a 150 mm lightweight panel 21, the width W can be 80 mm.

Although an L-shaped angle with a side length of 50 mm was used for the support member 51 in the embodiment, an L-shaped angle with a side length of 40 to 50 mm may be used depending on the height of the lightweight self-supporting wall. Can be done. Further, the support member 51 is not limited to this, and may be a flat bar, and any material that reinforces the bonded cement molded product 31, such as reinforcing bars, deformed reinforcing bars, and steel frames, can be used. .

In the lightweight self-supporting wall of the embodiment, the lightweight panels 21 to be joined are joined together, and the space between the lightweight panels 21 is closed using caulking material 25. However, if there is a gap between the lightweight panels 21 to be joined, as shown in FIG. As shown in FIG. 2, the space between the lightweight panels 21 can be closed off using an elongated plate-shaped extension panel 21a. Note that the same material as the lightweight panel 21 can be used for the extension panel 21a.

The cement used in the joint cement composition or fixed cement composition of the embodiment was Portland cement (ordinary Portland cement) specified in JIS R 5210:2019, but the cement does not produce cement hydrate. You can use it if you have it. As cements that can be used in joint cement compositions or fixed cement compositions, Portland cement specified in JIS R 5210:2019 (ordinary Portland cement, early strength Portland cement, ultra early strength Portland cement, moderate heat Portland cement, low heat Portland cement, sulfate-resistant Portland cement, ordinary Portland cement (low alkali type), early strength Portland cement (low alkali type), ultra early strength Portland cement (low alkali type), moderate heat Portland cement (low alkali type), low heat Portland cement (low alkali type), sulfate-resistant Portland cement (low alkali type)), or cement that does not fall under JIS but is equivalent to JIS R 5210:2019 (for example, ultra-fast hardening cement, foreign-made Portland cement, etc.) ) can be used. Blast furnace cement (JIS R 5211:2019), fly ash cement (JIS R 5213:2019), ecocement (JIS R 5214:2019), alumina cement (JIS R 2521:1995), hydraulic lime, etc. are also used. be able to. Further, as long as the strength of the bonded cement molded product 31 or the fixed cement molded product 41 is not reduced, air-hard materials (lime, gypsum, dolomite plaster, etc.) can also be used as the cement of the embodiment.

DESCRIPTION OF SYMBOLS 11...Foundation part, 12...Burning hole, 21...Lightweight panel, 21a...Extension panel, 22...Abutting surface, 23...Notch recess, 24...Through hole, 25...Caulking material, 31...Jointing cement molding, 41...Fixing Cement molded product, 51... Support member, 62... Reinforcement tape, 63... Supporting material.

Claims (5)

A plurality of lightweight panels that are erected by joining horizontally adjacent ones to each other,
cutout recesses along the vertical direction provided on the butt surfaces of the lightweight panels;
a through hole formed from the opposing notch recesses by butting the lightweight panels;
a plurality of support members inserted into the through hole and erected at intervals on a foundation site on which the lightweight panel is installed;
A lightweight self-supporting wall comprising: a bonded cement molded product filled in the through hole and hardened;
The bonding cement composition forming the bonded cement molding is a composition in which 100 parts by mass of a cement-based non-shrinkage grout material, 20 to 100 parts by mass of cement, and 100 to 200 parts by mass of silica sand No. 6,
A lightweight self-supporting wall characterized in that the flow value of the slurry of the bonded cement composition is 125 to 250 mm in accordance with JASS15M-103 . The lightweight self-supporting wall according to claim 1, wherein the lightweight panel is made of polystyrene foam (EPS (expandable polystyrene beads)) with an expansion ratio of 30 to 60 times. A hole punching step of providing a plurality of embedding holes in which supporting members for reinforcing the lightweight self-supporting wall are buried in the foundation part where the lightweight self-supporting wall is to be constructed;
an erecting step of vertically erecting the support member by filling each of the buried holes with a slurry of a fixed cement composition that fixes the support member;
Lightweight panels each having a notched recess extending in the vertical direction on their abutting surfaces are installed between the plurality of upright support members, and a penetration formed from the facing notched recess between the installed lightweight panels is provided. an installation step of inserting the support member into the hole;
A filling step of filling the through hole with a slurry of a bonding cement composition in which 100 parts by mass of a cementitious non-shrinkage grout, 20 to 100 parts by mass of cement, and 100 to 200 parts by mass of silica sand No. 6 are mixed. have,
A method for constructing a lightweight self-supporting wall , characterized in that the slurry of the cement composition has a flow value of 125 to 250 mm in accordance with JASS15M-103 . 4. The lightweight self-supporting wall according to claim 3 , further comprising an embedding step of embedding a caulking material or a supplementary panel and a caulking material between the lightweight panels as a pre-step of the filling step. Construction method. 5. The method for constructing a lightweight self-supporting wall according to claim 3, wherein the lightweight panel is made of polystyrene foam (EPS (expandable polystyrene beads)) with an expansion ratio of 30 to 60 times.

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