JPS62111703A - Method of molding fiber reinforced concrete panel with l-shaped section - 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 Field of the Invention The present invention relates to a method for forming cross-sectional fiber-reinforced concrete panels by injecting a hydraulic cement composition into a formwork.

Prior Art Cement compositions mixed with reinforcing fibers such as carbon fibers have high viscosity, low specific gravity (ρ = 1.0 to 1j5), and poor fluidity, so they cannot be skewered using conventional pouring methods. Otherwise, the filling properties were poor and there were many bubbles, making it difficult to efficiently produce cross-sectional fiber-reinforced panels.

OBJECT OF THE INVENTION The present invention has been made in view of the above-mentioned problems. The purpose is to create cross-sectional fiber-reinforced concrete panels that can be densely filled with cement composition, have excellent dimensional accuracy of molded products, have high adhesion strength when tiles, etc. are attached to the surface first, and have good forming efficiency. We propose a molding method.

Structure and Examples of the Invention This forming method is a method for forming a cross-sectional fiber-reinforced concrete panel by injecting a hydraulic cement composition mixed with reinforcing fibers into a formwork consisting of two orthogonal planar parts. , using a closed formwork with air vent holes on the side edges of the 2 plane parts, the ridge of the formwork was placed downward, each of the 2,000 plane parts was installed at an angle of approximately 45° to the horizontal plane, and the center of the ridge was The hydraulic cement composition is press-fitted into the formwork from near the area.

FIG. 1 shows a molding apparatus used in an embodiment of this molding method. The formwork 1 consists of 2,000 orthogonal plane parts 1-1゜1-2,
It is supported by a pedestal 2 having a rectangular cross-section, with the edge 6 facing downward, and the two-thousand-sided portions 1-1, 1-2 are inclined at an angle of 45 degrees with respect to the horizontal plane. This formwork 1 is a closed type consisting of a bottom frame material 4, a top cover frame material 5, and a peripheral frame material 6, and includes 2,000-sided parts 1-1,
A plurality of air vent holes 7 are provided at the side edge of j-2, and an injection port 8 for the cement composition is provided at an approximately center inner corner of the ridge 3.

In FIG. 1, a hopper 9 stores mortar 10, and the mortar 10 can be press-fitted into the formwork 1 by a mortar pump 12 via a pipe 11 communicating with an injection port 8.

A cement composition such as mortar mixed with reinforcing fibers such as carbon fibers is press-fitted into the formwork 1 having the above configuration and arrangement through the injection port 8 to form a cross-sectional fiber-reinforced concrete panel. In this molding process, the mortar 1 press-fitted from the injection port 8
0, while forming concentric contour lines within the plane part of the 45° inclined surface, pushing upward from the bottom, and at the same time expelling the air accumulated on the 5 surfaces of the upper cover frame material from the air vent hole 7, and forming the formwork 1. The inside is densely filled. When filling is completed, the air vent hole 7 is closed and the injection port 8 valve is closed to complete the injection.

FIG. 2 shows the formwork 1 used in the above example, in which tiles 16 with a thickness of 9mm are laid out in advance on the inner surface of the flat bottom frame material 4, and mortar 10 mixed with carbon fiber is press-fitted into the formwork 1, and tiles 16 with a thickness of 30mm are laid out in advance. A fiber-reinforced concrete panel pre-attached with tiles was formed. FIG. 5 is a contour diagram showing the arrival line of the mortar when the mortar 10 is press-fitted into the formwork 1 in relation to time.

Regardless of whether the formwork was thin and had tiles lined up on one surface, it was possible to form a solid cross-sectional panel with no junk or bubbles in a mortar press-in time of 2 minutes and 5 seconds. Additionally, the pre-attached tiles could be accurately and firmly aligned and fixed, and the panel dimensions were also highly accurate.

Effects of the Invention This invention is as described above, and according to this molding method, the base material is densely filled without junkers, air bubbles, etc., the dimensional accuracy is excellent, and the cross section has high adhesion strength when tiles are first attached to the surface. This makes it possible to efficiently form fiber-reinforced concrete panels.

[Brief explanation of drawings]

FIGS. 1 and 2 are perspective views of a molding apparatus consisting of a mold and ancillary equipment used in the examples, and FIG. 6 is a contour diagram showing the correlation between the line of arrival of mortar in the mold and time. 1. Formwork, 1-1.1-2. Flat part, 2. Frame,
3. Edge, 4. Bottom frame material, 5. Top lid frame material, 6. Surrounding frame material, 7. Air vent, 8. Inlet, 9. Hopper, 10. Mortar, 11 °・Pipe, 12.・Mortar pump, 16@・Tile. Figure 1

Claims (1)

[Claims] (1) In a method of forming a fiber-reinforced concrete panel with an L-shaped cross section by injecting a hydraulic cement composition mixed with reinforcing fibers into a formwork consisting of two orthogonal plane parts, the side of the two plane parts is sealed. Use a formwork with air vent holes at the edges, with the edge of the formwork facing down, and the two plane parts each about 4 degrees from the horizontal plane.
A method for forming a fiber-reinforced concrete panel with an L-shaped cross section, characterized by installing the panel at an angle of 5° and press-fitting a hydraulic cement composition into the formwork from near the center of the ridge.