JPH04231538A - Precast curtain wall plate - Google Patents

Abstract

PURPOSE:To provide a precast curtain wall plate which is light in weight, withstands a high tensile force, and has less possibility of cracking caused by strong wind when used as a wall material, and whose weight is reduced by decreasing the amount of reinforcing bars installed independently of the reinforcing bar beams. CONSTITUTION:A reinforcing bar beam A such as a space truss beam is assembled in a lattice form. A lightweight filling material 5, such as air mortar, which is light in weight and has a heat insulating effect is placed in the space portion of reinforcing bar beams A assembled in a lattice form. The reinforcing bar beams A and lightweight filling material 5 are covered with resin mortar 4 which has a tensile force three to four times as high as that of concrete.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improvements in precast curtain wall boards suitable as exterior wall materials for buildings.

0002

BACKGROUND OF THE INVENTION Conventionally, it has been common to use a core material with reinforcing bars arranged on the front and back sides of a reinforced beam or mesh, and to bury this core material in concrete.

0003

[Problems to be Solved by the Invention] By the way, the conventional precast board described above has high rigidity but lacks elasticity, so when it is used as a wall material,
When a precast board is bent due to strong winds such as a typhoon,
There was a problem that cracks occurred due to the lack of elasticity. Additionally, since a large number of reinforcing bars had to be placed, the weight increased, making construction work difficult.

The present invention is intended to solve the above-mentioned problems, and its purpose is to be lightweight, have high tensile strength, and when used as a wall material, will be less prone to cracking due to strong winds, etc. It is an object of the present invention to provide a precast curtain wall board that can reduce the amount of reinforcing bars buried separately from the reinforcing beams, thereby reducing the weight.

[0005]

[Means for Solving the Problems] The precast curtain wall board of the present invention is intended to achieve the above-mentioned object, and its means include assembling reinforcing beams such as three-dimensional truss beams in a lattice shape, and assembling them in the lattice shape. The space of the reinforcing bar beam is filled with a lightweight filler such as air mortar, and the reinforcing bar beam and the lightweight filler are buried in resin mortar having a tensile strength 3 to 4 times that of concrete.

[0006]

[Operation] The precast curtain wall board constructed as described above is made by assembling reinforcing bar beams such as three-dimensional truss beams in a lattice shape, placing this in a formwork, pouring resin mortar, and placing the reinforcing bar beams in the resin mortar in a space. Bury it leaving a recess. Next, a filler such as air mortar is filled in the recess, and after the filler is solidified, resin mortar is poured into the filler, including the upper surface of the filler, to form a plate-shaped precast curtain wall board.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the precast curtain wall board of the present invention will be described below with reference to the drawings. Fig. 1 shows a three-dimensional truss beam A, which is a type of reinforced beam, in which a large number of lattice bars 2 formed in a substantially V-shape are welded to two lower chord members 1 at an alternating angle. It is constructed by welding the upper chord member 3 to the upper end. Then, the three-dimensional truss beams A are assembled into a lattice shape as shown in the plan view of FIG. 2, and then placed in a formwork (not shown), resin mortar 4 is poured in, and the truss beams A are embedded in the resin mortar 4. . When embedding the truss beam A in the resin mortar 4, the resin mortar 4 is not poured entirely into the lattice-shaped space, but is instead formed in the form of a recess 4a.

Next, air mortar 5 made by mixing melamine resin in mortar is filled into the recess 4a, and after this solidifies, resin mortar 4 is poured including the upper surface of the air mortar 5 to form a cross-sectional shape. It is formed into a plate shape as shown in FIGS. 3 and 4. In addition, 6 is a reinforced beam A
The reinforcing bars placed on the front and back surfaces are thinner and have fewer reinforcing bars than conventional ones. In addition, as another manufacturing method, the reinforcing bar beams A arranged in a lattice shape are placed in a slightly floating state within the formwork, and are solidified and formed in advance to a size that can be inserted into the lattice shape of the reinforcing bar beams A. The air mortar 5 may be placed in a slightly floating state, and the resin mortar 4 may be poured in the state where the reinforcing beam A and the air mortar 5 are placed to form a curtain wall board. In addition to the air mortar 5 described above, a filler that is lightweight and has a heat insulating effect, such as foamed resin, may also be used.

The curtain wall board constructed in this way is lightweight and highly elastic, so when this curtain wall board is used as an exterior wall board for a building, the board itself will maintain its elasticity even in the face of strong winds such as a typhoon. It does not crack due to bending, and therefore has a longer service life than conventional precast concrete plates, and is easier to handle.

0010

[Effects of the Invention] As described above, the present invention has a structure in which reinforcing bar beams such as three-dimensional truss beams are assembled in a lattice pattern, a lightweight filler is buried in the space, and the reinforcing bar beams are buried together with resin mortar to form a plate-like structure. Since we formed a precast curtain wall board, this curtain wall board is lightweight and has good elasticity, so even if it bends due to strong winds during a typhoon, the concrete will not peel off and fall off. Since the amount of additional reinforcing bars can be reduced, it has the advantage of being lightweight and inexpensive to manufacture.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a truss beam.

FIG. 1 is a plan view showing one embodiment of the present invention.

FIG. 3 is a perspective view of the same as above.

FIG. 4 is a cross-sectional view of FIG. 3;

[Explanation of symbols]

A Reinforced beam 4 Resin mortar 5 Air mortar 6 Reinforcing bars

Claims (1)

[Claims] Claim 1: Rebar beams such as three-dimensional truss beams are assembled in a lattice shape, and the spaces between the reinforcing bar beams assembled in the lattice shape are filled with a lightweight filler material such as air mortar that is lightweight and has an insulating effect. and the said lightweight filler compared to concrete.
A precast curtain wall board characterized by being embedded in resin mortar having a tensile strength of ~4 times.