JPH0242981B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an external insulation method for an external wall made of reinforced concrete by providing a ventilation layer and a heat insulating material layer on the outer surface of the external wall to provide so-called external insulation with a ventilation layer.

[Conventional technology]

As shown in Figure 10, an external insulation method for an external wall in which a ventilation layer and a heat insulating material layer are provided on the external surface of a reinforced concrete external wall is as shown in Figure 10. Material b and a precast concrete plate c to protect it are constructed, and a ventilation layer d is created between the precast concrete plate c and the insulation material b.
It is already known from sources such as (published by Maruzen Co., Ltd. and edited by the Architectural Institute of Japan, Architectural Design Data Collection, Volume 1). In the figure, e is the finishing material for the indoor side surface.

[Problem that the invention seeks to solve]

According to the above external insulation method, concrete wall a
Because it is constructed by pouring concrete on-site, not only does temporary frame construction (bringing the formwork to the site, assembly, and disassembly and removal) require a great deal of labor and expense;
Since the precast concrete plate c is attached to the anchor bolt embedded in the concrete wall a, the precast concrete plate c cannot be installed until after the concrete wall a is demolded, which has the disadvantage that the construction period becomes long. In addition, as natural aggregates for concrete aggregates have come to be relied on, such as sea sand and mountain sand (crushed stone), reinforcing reinforcing bars in concrete have rusted,
In recent years, artificial aggregates (artificial lightweight aggregates such as biltong and mesalite made from expanded shale, volcanic ash, Shirasu Balloon, by
Although the development and practical use of porcelain-based ceramic aggregates (porcelain-based ceramic aggregates) are being actively developed and put into practical use, in the above construction method, if the quality of the concrete aggregate is upgraded by using artificial aggregates in the concrete wall a, expensive artificial aggregates can be used. This requires a large amount of wood, which is disadvantageous from an economic standpoint.

In view of the above-mentioned conventional drawbacks, the present invention utilizes the advantages of cast-in-place concrete and respects the economic efficiency of natural aggregate, while creating cast-in-place concrete using a relatively thin concrete skin material that requires less artificial aggregate. By compensating for the shortcomings of the insulation material and ensuring that the insulation material is held in place by the outer skin material, the insulation material is of high quality and durable as a whole, and the ventilation layer and the insulation material can be used as designed. This paper proposes a new and useful external wall insulation method that can economically construct an external wall that prevents condensation and provides heat insulation.

[Means for solving problems]

The external wall insulation method according to the present invention includes a cement-based panel in which a plurality of ridges are arranged at predetermined intervals on the back surface, and a plurality of ridges lower in height than the ridges are arranged at predetermined intervals on the back surface. and a cement-based panel with the former located on the indoor side and with their back surfaces facing each other, and a heat insulating material is placed between both panels in a state where it is sandwiched between the raised parts of both panels, Both panels are connected by bolts passing through the insulation material at the position of the raised portion, and a gap between the insulation material and the panel outside thereof is formed as a ventilation layer, while a gap between the insulation material and the panel inside the insulation material is formed as a ventilation layer. The feature is that concrete is poured on-site with wall reinforcements placed in the gaps between the walls, creating an externally insulated exterior wall with a ventilation layer.

[Effect]

According to the above configuration, since the raised part of the cement-based panel located on the outdoor side is shorter than the raised part of the cement-based panel located on the indoor side, the heat insulating material sandwiched between the raised parts of both panels will be embedded in a position that is biased towards the outdoors from the center of the wall thickness, and by arranging wall reinforcements and placing concrete in the gap between the above-mentioned insulation material and the indoor panel, the insulation will be improved. A reinforced concrete wall that bears the necessary strength as an external wall is formed on the indoor side of the building, creating a so-called externally insulated external wall.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

As shown in FIGS. 1 and 2, a plurality of independent raised portions 1a (not continuous vertically, horizontally, or diagonally) forming a trapezoid shape when viewed from the side are arranged vertically and horizontally at predetermined intervals on the back surface. A cement-based panel 1 made of polymer cement mortar or the like, and a cement-based panel 2 made of the same material and having a plurality of vertically continuous protuberances 2a arranged at predetermined intervals on the back side, the former is located on the indoor side. In addition, a heat insulating material 3 is placed between both panels 1 and 2 at the raised portions 1a of both panels 1 and 2.
..., 2a..., and the heat insulating material 3
Both panels 1, 2 are connected by bolts 4 made of stainless steel or anti-corrosion treated steel that pass through them, and nut members 5 made of the same material that are screwed into the ends of the bolts 4...
are connected to each other at the positions of the raised portions 1a and 2a. The heat insulating material 3 is held at a predetermined position near the outer surface of the outer wall by being held between the raised portions 1a and 2a from both sides. Further, a vertically continuous gap s between the heat insulating material 3 and the panel 2 outside thereof is formed in the ventilation layer 6. Vertical and horizontal wall reinforcements 7 are arranged in a gap S that is continuous in a vertical and horizontal lattice shape between the heat insulating material 3 and the panel 1 inside thereof. These wall reinforcements 7 are fixed to appropriate positions on the back surface of the panel 1 with metal fittings 8 or the like before connecting both panels 1 and 2 with bolts 4.

Each of the bolts 4 is fitted with a sleeve 9 made of a material with high compressive strength (e.g., a steel sleeve) at the portion that passes through the heat insulating material 2, and the bolt 4 is tightened with the nut member 5. When the sleeve 9... has both end surfaces touching the raised portions 1 of both panels 1 and 2,
a, 2a to keep the distance between both panels 1, 2 above a certain level, and the heat insulating material 3 contacts the raised portions 1a..., 2a.
It is configured to prevent it from being crushed to a certain thickness or less by a... These sleeves 9...
is inserted into a predetermined position of the heat insulating material 3 at a construction site, and as shown in FIG. You can also leave it installed. The heat insulating material 3 can be made of various materials such as glass wool, foam polystyrene, and phenol resin panels.

Next, as shown in FIGS. 3 and 4, the void S
Concrete 10 is poured on-site to construct a composite wall of this cast-in-place concrete 10 and panel 1, and finishing material 11 is applied to the surfaces of both panels 1 and 2 by spraying mortar, etc., and ventilation layer 6 is formed. The outer wall W has external insulation.

The bolts 4 are cast-in-place concrete 10
Deformation of both panels 1 and 2 due to lateral pressure of panel 1,
It serves as a separator to prevent the gap between the two from increasing, etc., and it also serves to connect the panel 2 located outside the heat insulating material 3 to the composite wall (similar to a conventional anchor bolt). As shown in FIGS. 6 and 7, the panel 1 has a hollow shape made of a material such as polymer cement mortar, which is made by impregnating SBR polymer with mortar using high-quality river sand or artificial aggregate. As the cross-sectional shape is shown in Figure 6,
A panel material A consisting of two flat plate portions facing each other with a predetermined interval l and a plurality of ribs 1b (two in the drawing) located between the two flat plate portions is formed by a vacuum extrusion molding machine B. During continuous extrusion molding, before the panel material A has hardened,
A piano wire C for cutting provided at a position crossing the moving path of the panel material A is moved up and down within the height of the rib 1b..., that is, within the range of the interval l between the flat plate-shaped portions of the panel material A. Then, as shown in Fig. 7, the panel material A is divided into upper and lower halves by cutting the ribs 1b in a zigzag shape, and this bisected panel material is cut to a predetermined length and cut at the required position. It is manufactured by drilling bolt insertion holes. As shown in Fig. 8, the outer panel 2 is made of a hollow panel material A' having short ribs 2b... made of piano wire held stationary in a fixed position.
It was manufactured by dividing it into upper and lower parts at C', and the materials and vacuum extrusion molding machine used were the same as for inner panel 1.

Both panels 1 and 2 are made by vacuum extrusion molding to create a smooth precast concrete product with a porosity close to zero, and also have the effect of reinforcing the cement + aggregate crystals with a polymer adhesive.
The tensile strength and bending strength are increased, and the panel has high toughness even though it is a cement-based panel.

Therefore, even if sea sand or mountain sand is used as the aggregate for cast-in-place concrete 10, the disadvantages can be fully compensated for by the panels 1 and 2, which are the outer skin materials, and the overall quality is high. The outer wall W is durable, and the heat insulating material 3 does not deviate in the wall thickness direction, and the heat insulating effect as designed is exhibited. Since the inner panels 1 and the outer panels 2 are connected to each other via cast-in-place concrete 10, connecting members between the panels are not required in principle, but a plurality of panels 1 or 2 are connected in advance. When connecting ... to form a large panel, it is necessary to use appropriate connecting members at the vertical joints of the panel.

FIG. 9 shows another embodiment of the invention. Raised portion 2a
The spacing between... is set to a size that can support the heat insulating material 3 so that it does not deform outward due to the lateral pressure of the cast-in-place concrete 10, and the spacing between the raised portions 1a of the inner panel 1. There is no need to match.

Further, in each of the above embodiments, the outer panel 2
Although the raised portions 2a of the inner panel 1 have a vertically continuous shape, they can also be formed as independent raised portions, that is, not continuous vertically, horizontally, or diagonally, similarly to the raised portions 1a of the inner panel 1. .

〔Effect of the invention〕

Since the present invention has the above-described configuration, it has the following effects.

With the insulation material installed between a pair of cement panels, concrete is poured on-site between the insulation material and the inner panel, so the panels serve as the outer skin of the cast-in-place concrete, significantly reducing the amount of work required for temporary frames. This will shorten the construction period. In this case, the height of the raised part of the cement-based panel located on the outdoor side is shorter than the raised part of the cement-based panel located on the indoor side, so the insulation material sandwiched between the raised parts of both panels is In addition, by arranging wall reinforcements and placing concrete in the gap between the insulation material and the indoor panel, A reinforced concrete wall that bears the necessary strength as an external wall is formed on the indoor side, and a so-called externally insulated external wall is constructed.

The insulation is sandwiched between the ridges on the back of both panels, making it easy to hold the insulation in place and allow the lateral pressure of the concrete to hold the insulation in place when pouring into the gap between the insulation and the inner panel. Since the raised portions of the outer panel can prevent the heat insulating material from deforming outward, a ventilation layer with a predetermined cross-sectional area can be ensured. Therefore, the dew condensation prevention and insulation effects as designed for external insulation with a ventilation layer are exhibited.

The above-mentioned panels only need to have the thickness as the outer skin material of cast-in-place concrete, and even if artificial aggregates, polymer cement mortar, etc. are used, the amount used is small, so the material cost of the panels can be kept low. be able to. In addition, even if sea sand or mountain sand is used as aggregate for cast-in-place concrete, the disadvantages of cast-in-place concrete can be compensated for by high-quality, high-strength cement-based panels that use artificial aggregate or polymer cement mortar. . Therefore, an overall high-quality and durable exterior wall can be constructed economically.

Any thickness of insulation can be accommodated by simply changing the length of the bolts that connect the panels.

[Brief explanation of drawings]

Figures 1 to 7 show examples of the present invention, Figures 1 and 2 are longitudinal sectional side views and cross-sectional plan views of the exterior wall during construction, and Figures 3 and 4 are the exterior walls after construction is completed. FIG. 2 is a longitudinal side view and a transverse plan view of FIG. 5 is a sectional view showing an example of the sleeve, and FIGS. 6, 7, and 8 are explanatory diagrams of a method of manufacturing a cement-based panel.
FIG. 9 is a cross-sectional plan view of an outer wall during construction showing another embodiment of the present invention. FIG. 10 is an explanatory diagram of a conventional example. DESCRIPTION OF SYMBOLS 1, 2...Panel, 1a, 2a...Protuberance, 3...Insulating material, 7...Vent layer, 10...Cast-in-place concrete, S, s...Void.

Claims (1)

[Claims] 1. A cement-based panel with a plurality of raised parts arranged at predetermined intervals on the back side and a cement-based panel with a plurality of raised parts arranged on the back side with a predetermined interval lower than the height of the raised parts, the former being The panels are placed on the indoor side with their back faces facing each other, and a heat insulating material is placed between both panels so as to be sandwiched between the raised parts of both panels, and both panels are placed at the position of the raised parts. The insulation material is connected with a bolt that passes through the insulation material at the step 3, and the gap between the insulation material and the panel outside the insulation material is formed into a ventilation layer, while the wall reinforcement is installed in the gap between the insulation material and the panel inside the insulation material. This is an external insulation method for external walls, which is characterized by pouring concrete on-site with the walls in place and creating an external insulation wall with a ventilation layer.