JPS5985709A - Fiber reinforced concrete board and its manufacture - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention provides fiber g1 (
This invention relates to a fiber-reinforced concrete plate with a built-in frame and a method for manufacturing the same.

As a conventional method for manufacturing fiber-reinforced concrete boards, for example, there is a method for manufacturing glass fiber-reinforced cement boards in Publication No. 57-39203, which basically involves a layering method using a spray method. To explain this simply, first, the process involves spraying a thin layer of cement paste onto the mold surface, then the process of long fibers, short fibers, and long fibers in the order of glass #l! The manufacturing method consisted of a process of spraying fibers, and finally a pressurized dehydration process. However, here, long fiber means longer than short fiber, and the actual length is about 37 mm.

However, such conventional cement boards had problems in that the spraying process was required and the labor cost per cement board was high.

Furthermore, the fiber-reinforced concrete board manufactured by the above-mentioned manufacturing method is
Since the fiber orientation is a two-dimensional random structure, the fiber orientation effect coefficient Vi is 30 to 37%, which is extremely low compared to unidirectional orientation. Therefore, the fiber addition rate is 4 to 5%.
One of the reasons for the high cost of glass fiber cement board is that it is expensive.

The present invention has been made to overcome these conventional drawbacks, and its purpose is to improve the strength of fiber-reinforced concrete plates, provide a low-cost product, and improve the strength of fiber-reinforced concrete plates by pouring and compaction methods. The objective is to provide a simple manufacturing method.

That is, in order to achieve this object, the fiber-reinforced concrete board of the present invention incorporates multiple layers of fiber frames in which continuous fibers are stretched in a frame body of a desired shape, and the manufacturing method thereof includes a molding method. A first layer process involves pouring a cement mixture onto the frame molding surface, applying vibrations to make the surface flat, and placing the fiber frame on top of this. It consists of a second layer process in which the fiber frame is placed on the fiber frame again, and a third layer process in which a cement mixture is added on top of this, and the surface is made flat with vibration and force, and then finished with a trowel. The above second layer step 1
I was busy repeating it one or more times.

Next, a basic example of the present invention will be explained.

FIG. 1 is a perspective view of the fiber frame 2, where the frame body] is the frame material 1a+
Consisting of 1b + 1e + 1d + 1etlf, this frame IK
It is made by winding continuous fibers 3.

In this case, the distance between the frame material 1a and the frame material 1b forming the frame l is from al to b1, from bl to a2, and from a2 to b2.
Fiber 3 is wound in this way.

FIG. 2 is a partially cutaway perspective view of the fiber-reinforced concrete board 5, and the internal structure of this concrete board 5 in FIG. It shows that two fiber frames 2 are built in from the layer 4C.

Next, a method of manufacturing the above-mentioned fiber-reinforced concrete IJ-top board 5 will be explained. When implementing the process, first create a frame IK of the desired shape.
Continuous #l! A fiber frame 2 is made by wrapping the fiber 3. Then, while applying a cement mixture to the molding surface and applying vibration, the surface of the warp is made of planar PVC, and the fiber frame 2 is placed thereon to form the first layer 41L. Next tilt this first layer 4
Pour the cement mixture onto a again and apply vibration to make the surface flat.

A second fiber frame 2 is placed to form a second layer 4b, and a cement mixture is further poured onto this second layer 4b, and the surface is polished and finished by applying vibration. i4c is formed to produce a fiber reinforced concrete board 5.

Cement mixtures here include mortar, concrete,
#g Fiber mortar, mortar containing chobuto strands of glass fibers, etc., including mixtures of all other cements.

Types of fibers include glass fibers, carbon fibers, polypropylene, and other chemical fibers.

The frame may have any shape as long as continuous fibers can be stretched thereon, and there are no restrictions on the material or cross-sectional shape of the frame material.

Stretching means wrapping continuous fibers directly around the frame, sandwiching them, gluing them, tying them, spraying them, heat spraying them, or using other methods to attach them to the frame body. It includes those in which continuous fibers are stretched, and also includes those in which continuous fibers are stretched indirectly by using a frame.

The trajectory drawn by the continuous fibers includes all possible continuous lines in relation to the desired shape of the frame. This will be explained using a diagram. FIG. 1 shows that adjacent continuous fibers are parallel or almost parallel. FIG. 3 is a diagram showing that the continuous fibers 3 are straight lines in which the adjacent continuous fibers 3 are disordered with each other. Figures 4 and 5 are continuous fja,
It is a diagram showing that the fibers are connected in a continuous straight line while being broken. In addition, all possible trajectories of the continuous fibers m depending on the shape of the frame are included.

The continuous fiber may be used in the form of a single line or double line, or may be knitted in advance and used in a net tie.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 6 is a partially cutaway perspective view of a glass fiber-reinforced concrete board 5' according to the first embodiment of the present invention, which includes five glass fiber-reinforced concrete boards and three glass fiber frames; Each has a different fiber orientation.

The glass RMk frame Qj has three types of orientation: primary.

FIG. 7 is a diagram showing a glass fiber frame 2a in which glass continuous fibers 3' are oriented in parallel and straight lines in the vertical and horizontal directions in the frame l, and FIG. 8 shows a frame IK continuous glass fiber 111; '
FIG. 9 is a diagram showing a glass fiber frame 2b in which the glass fibers 3' are oriented linearly in random directions, and FIG.

By incorporating the above three types of glass fiber frames 2a + 2b 12c, the strength is improved and the weight is reduced, and the impact is 5g.
The concrete plate 5 is strong against K. Note that the first layer 4a
.

The cement mixture of the second layer 4b and the fourth layer 4d with 4c% of third waste is made of mortar.

Next, the manufacturing method of this first embodiment will be explained.

First, mortar is poured onto the molding surface of the mold, and the surface is made flat while being vibrated, and then the glass fiber frame 2a is
The first layer 4a is placed on top of the glass fiber frame 2b to form the second layer 4b. double layer 4b
Put mortar on top, apply vibration 1b to make the surface flat, place glass fiber frame 2c to form third Wi 44C, put the last mortar on top of third layer 4C and apply vibration to make the surface was brought into a flat state and finished with a trowel to form the fourth layer 4d, and glass #I! #Manufacture reinforced concrete plate 5#.

FIG. 10 is a partially cutaway perspective view of a carbon fiber reinforced concrete plate 5'' which is a second embodiment of the present invention.

In the figure, the heat insulating layer 6 is formed of a heat insulating material made of an inorganic fibrous material such as glass wool, porcelain, fural, or an organic/inorganic porous material.

Two carbon fiber frames 2'' are built in as shown in the figure.

The cement mixture of the first layer 4a, the second layer 4b% and the third layer 4C is made of concrete. In addition, carbon fiber frame 2"
will be explained in detail with reference to FIG. The frame body 1 has the shape of a rectangular parallelepiped, carbon fibers 3# are stretched on the front surface 7, and a wire mesh 9 is stretched on the back surface 8 to constitute a carbon fiber frame 2''. , concrete placement for the above configuration;
It plays the role of holding down the heat insulating U scrap 6 during vibration,
This improves the thickness accuracy and, by extension, the dimensional accuracy of the carbon fiber concrete plate 5''.The reason for providing the heat insulating material layer 6 is to obtain a heat insulating effect, and if the heat insulating layer 6 is replaced with a sound absorbing material layer, the sound absorbing effect will be improved. You can expect.

Next, a manufacturing method of this second embodiment will be explained.

Although this embodiment is similar to the first embodiment, it has characteristics in the type of fiber, the method of using the carbon fiber frame i', and the process of placing the heat insulating material layer 6.

Trap concrete is poured onto the forming surface of the formwork, vibrated to make the surface flat, carbon fiber frame i' is placed, and carbon fiber frame 2
Concrete is also poured into the intermediate layer 10 of ``, and vibrated to form the first layer 4a.The heat insulating material layer 6 is placed on the first layer 4a, concrete is poured into the blank part 11, and the second layer 4a is formed. A layer 4b is formed, a second carbon fiber frame 2'' is placed on top of the second layer 4b, concrete is poured into the intermediate layer 10 of this carbon fiber frame 2'', and the surface is made flat by applying vibrations. At the same time, the last concrete is poured on top of the concrete, and the surface is scraped and finished with K while applying vibration to produce a carbon fiber reinforced concrete plate 5'', which forms the third scrap 4C. Carbon fiber frame 2
To explain in a little more detail how to use #, the first carbon fiber frame i' is used with the wire mesh surface 8 facing upward, and the second carbon fiber frame i' is used with the wire mesh surface 8 facing downward.

Although the above two examples have been given, fiber-reinforced concrete plates manufactured by changing the fiber frame and combining cement mixtures are also included in this category if the fiber frame is incorporated throughout the fiber frame. shall be taken as a thing.

Next, a supplementary explanation will be given regarding the frame body and frame material that made the fiber rod technology of the present invention possible.

There are two types of frames available: KO. The cane and frame material themselves have elasticity and rigidity, and have some kind of mechanical action.
The frame body is an assembly of frame materials that have a cement mixture and crushed materials that have the effect of reinforcing fiber-reinforced concrete plates. For example, reinforcing bars, resin rods, and glass rods are used as the crushing material, and any other materials that adhere to the cement mixture and produce a reinforcing effect are also included in this category. The other type is a frame that is an aggregate of crushed materials that does not produce any mechanical effect or produces only a negligible mechanical effect even when the frame material itself is combined with the cement mixture. For example, as a frame material, it is possible to use small-diameter iron wire, styrofoam rods, plasti, resin, etc. In this way, there are two types of frames, and both of them have the function of stretching continuous fibers. Either frame may be selected depending on the purpose of the fiber reinforced concrete board.

As mentioned above, since the fiber-reinforced concrete plate and the manufacturing method thereof of the present invention have the above-described configuration and manufacturing method, the following effects are achieved.

Since it is a fiber frame with continuous fibers stretched, the fiber orientation is linear, and if adjacent fibers are made parallel or almost parallel, they become straight parallel orientation, and the weft efficiency is 100%.
It is possible to improve the reinforcing effect more than the conventional technology. Therefore, for this purpose, the amount of fiber is reduced compared to the conventional technology,
It is possible to obtain a fiber concrete board that is inexpensive, strong, and light.

Next, the step of placing the fiber frame is carried out after pouring the cement mixture and making the surface flat while applying vibrations. Therefore, the stretched continuous fibers are housed inside the fiber-reinforced concrete board with the R-axis controlled to that extent.

This has a great effect on product strength and quality control.

Among fiber concretes, in the case of glass fiber concrete, the reinforcing material is glass ta and fibers, and in the case of steel fiber concrete, the reinforcing material is W1 fibers.

When the present invention is combined as follows, the frame becomes a reinforced structure. For example, in a glass fiber-reinforced concrete board in which the frame is made of reinforcing bars with a large frame diameter and a glass fiber frame is built in, the glass fibers and the frame serve as the reinforcement.

In this invention, the frame itself is also reinforced and f! This makes the fiber-reinforced concrete board even stronger than 1.

Regarding the manufacturing method, since the reinforcing fibers are pre-dispersed and oriented as FFL fibers, only the process of placing the fiber frame is required, compared to the spray method.
Easy to manufacture. In addition, the cement mixture that forms each step of the first, second, and third layers can be added layer by layer and vibrated, so the productivity is lower than that of the spray method and the M scrap method. Improve your morale.

[Brief explanation of the drawing]

Figure 1, Figure 2, Figure 3, Figure 4, and Figure 5 each show the basic example of this construction. Figure 1 is a perspective view of a fiber frame, and Figure 2 is a fiber reinforced concrete. FIG. 3 is a plan view showing the other side of the fiber frame, FIGS. 4 and 5 are perspective views showing the other side of the PR# frame, and FIG. 6 is a perspective view showing the other side of the fiber frame. A partially cutaway perspective view of a glass fiber reinforced concrete plate according to the first embodiment, FIG. 7 is a plan view showing the same glass tRm frame, and FIGS. 8 and 59 are plan views showing other examples of the glass fiber frame. , FIG. 10 is a partially cutaway perspective view of a carbon fiber reinforced concrete plate according to a second embodiment of the present invention, and FIG. 10 is a perspective view of the same carbon feed m frame. 1... Frame body 2... Fiber frame 3... Continuous fibers 4a... First layer 4b-I - Second layer 4C... Third layer 5... Fiber reinforced concrete plate special W Applicant: Daikichi Matsu Figure 1 Figure 2 Figure 3 Figure 4 Figure 6 Figure 7 Figure 1O Figure 8 Figure 9 Figure 11

Claims (1)

[Scope of Claims] /) A fiber-reinforced concrete board incorporating multiple layers of fiber frames in which continuous fibers are stretched over a frame body of a desired shape. , 2) Pour the cement mixture onto the molding surface of the part frame,
The first step is to make the surface flat while applying vibrations, and then place the fiber frame on top of it.The second step is to put the cement mixture on top of this, apply vibrations to make the surface flat, and then place the fiber frame again. It consists of a two-layer process and a third-layer process in which this upper-pressure cement mixture is added, the surface is flattened while being vibrated, and the surface is finished with a trowel.The second-layer process is repeated one or more times. A method for manufacturing a fiber-reinforced concrete board, characterized by: