JP2629550B2 - Method of manufacturing reinforced concrete facing - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a reinforced concrete face material having enhanced strength.

[0002]

2. Description of the Related Art Conventional large-sized reinforced concrete facing materials are usually manufactured by arranging a grid-like reinforcing bar in two layers and placing concrete in a formwork having shear reinforcing bars. At present, no particular consideration has been given to the improvement of the in-plane / out-plane shear strength and the out-of-plane bending strength, and the improvement of the toughness after the occurrence of cracks.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to improve the in-plane and out-of-plane shear strength and out-of-plane bending strength of a conventional large-sized reinforced concrete panel, and to improve the toughness after cracking.

[0004]

SUMMARY OF THE INVENTION The present invention is a method for producing a large-sized reinforced concrete face material for achieving the above object, and comprises a drum-shaped concrete block in a grid of face material reinforced reinforcing bars arranged in a grid. A method of manufacturing a reinforced concrete face material, wherein concrete is poured into a formwork in which a steel sheet is inserted and laid.

That is, according to the present invention, a drum-shaped concrete block is laid beforehand in a formwork, and the two are integrated by hardening concrete which is later cast.
Since the surroundings of the hardened concrete are constrained by a drum-shaped concrete block, the strength of the hardened concrete is improved, and the in-plane and out-of-plane shear strength, out-of-plane bending strength, and toughness after cracking of the entire face material are improved. improves.

The drum-shaped concrete block used in the present invention is produced in advance at a factory using a material having both compressive strength and tensile strength larger than cast concrete, and has a high shape. The length is equal to the thickness of the face material, and the diameter is large so that it is about the same as one side of the grid of the reinforcing bar.

Accordingly, the surface of the facing material manufactured in the present invention has a shape in which the circular end faces of the drum-shaped concrete block are drawn regularly and horizontally in the continuous phase of the hardened concrete. The drum-shaped concrete block restrains around the hardened concrete.

[0008] When the face material manufactured by the present invention is used as a wall, the hardened concrete has a higher shear strength than ordinary concrete manufactured without using a drum-shaped concrete block. On the other hand, resistance is high, and generation of cracks is suppressed as compared with ordinary concrete. However, if the shearing force becomes excessive, cracks first occur in the hardened concrete, and the hardened concrete is gradually destroyed and tries to jump out, but it is difficult to jump out because it is blocked by the drum-shaped concrete block, and until the hardened concrete becomes crushed stone The walls continue to share the compressive stress, while the reinforcing bars share the tensile stress, so that the wall behaves tough,
It does not cause sudden shear failure.

[0009] When the face material manufactured by the present invention is used as a floor, the hardened concrete on the compression side has higher compressive strength than ordinary concrete manufactured without using a drum-shaped concrete block. Increase. In addition, the drum-shaped concrete block and the hardened concrete cooperate with each other for the out-of-plane shearing force. Shear resistance increases.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of a drum-shaped concrete block used in the present invention.

FIG. 2 is a partial sectional view showing a state in which a concrete drum-shaped concrete block is laid on a grid of reinforcing bars arranged in a grid and concrete is cast.

[0013] A drum-shaped concrete block 1 is composed of a lattice formed by a vertical bar 2A and a horizontal bar 2B and a vertical bar 3 of another layer.
It is laid so as to pass through any of the grids formed by A and the horizontal streak 3B. This is surrounded by a formwork (not shown), concrete 5 is poured, and the gap between the reinforcing steel bar and the drum-shaped concrete block 1 is filled with concrete 5 and integrated to produce a face material.

FIG. 3 is a partial perspective view showing a state in which a drum-shaped concrete block is provided with a reinforcing bar for the floor. (A vertical bar and a horizontal bar are arranged in another lower layer, but are omitted.) The drum-shaped concrete block 1 is composed of a vertical bar 2A and a horizontal bar 2
B is inserted in the thickness direction of the floor in such a manner as to just cover the grid formed by B.

[0015]

According to the present invention, the strength of the hardened concrete is improved, and the in-plane and out-of-plane shear strength, out-of-plane bending strength, and toughness after cracking of the entire face material are improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a drum-shaped concrete block used in the present invention.

FIG. 2 is a partial cross-sectional view showing a state in which a drum-shaped concrete block is laid on a grid of reinforcing bars arranged in a grid and concrete is cast.

FIG. 3 is a partial perspective view showing a state in which a drum-shaped concrete block and a reinforcing bar are arranged for a floor.

[Explanation of symbols]

1 ··· Drum-shaped concrete block, 2A ·· Vertical streak, 2B
..Horizontal bars, 3A..Vertical bars, 3B..Horizontal bars, 4..Form surface, 5..Concrete

Claims (1)

(57) [Claims] 1. A method of manufacturing a reinforced concrete surface material, comprising: placing concrete in a formwork in which a drum-shaped concrete block is inserted and laid in the lattice of a reinforcing material reinforcing steel bar arranged in a lattice shape.