JPH011505A - Method for manufacturing lightweight aerated concrete panels with hollow parts - 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 Industrial Application] This invention relates to a method for manufacturing a lightweight cellular concrete panel in which a hollow section is previously provided for wiring, piping, etc. inside the lightweight cellular concrete panel. .

[Conventional technology]

Lightweight foam concrete is suitable for sand, slag, and flyer 7 sheets.
Water is added to a mixture of siliceous raw materials such as siliceous raw materials such as cement and calcareous raw materials such as cement and lime, and the mixture is foamed with a foaming agent or foaming agent to make it semi-plastic, and then hardened in an autoclave to form panels. Manufactured in shapes or blocks. When using this lightweight aerated concrete, holes are made in the concrete body to expose the internal reinforcing bars for installation, piping, wiring, etc., or holes for bolt holes for installation, piping, wiring, etc. Ah (I need to do it.

Conventionally, tools such as chisels, drills, and saws were used to make holes in this concrete body, but this method was extremely time-consuming and caused a lot of wear and tear on the tools. It is impossible to make holes. In addition, there is a method of designing the shape of the formwork so that holes are formed in the concrete body, or using individual formworks and inserting cores etc. into the formwork, but the former method In some cases, it is necessary to change the frame depending on the size and shape of the hole, which is inefficient and uneconomical, and in both cases, casting is performed in individual molds, which is inefficient.

Furthermore, by enclosing the iA body, a rubber balloon-like substance is inflated and used as a core; when the concrete becomes semi-plastic, it is broken and contracted, and the concrete body is There are methods such as forming a hollow part inside (Japanese Patent Publication No. 740/1983),
It is very difficult to change the shape in various ways,
Also, it is not a very efficient method because the balloon-like objects must be broken individually to extract the contents.

[Problem that the invention seeks to solve]

The present invention eliminates the above-mentioned drawbacks and provides a method for easily and efficiently manufacturing lightweight cellular concrete panels having hollow sections.

CI! jl! [Means for Solving Point II] In order to achieve this object, the present invention, when manufacturing lightweight cellular concrete, casts a concrete raw material mixture mixed with a foaming agent into a mold and foams it. After the concrete has become semi-plastic, the formwork is removed, and the semi-plastic material is cut into flat plates using piano wire, etc., and a difference is made on the surface of the semi-plastic material.
After joining and integrating the swirled surface with a semi-circular semi-circular material with grooves or without a sill, it is cured with high-temperature and high-pressure steam to create a lightweight product with a hollow part. This is to obtain aerated concrete panels.

Embodiments of the present invention will now be described with reference to the drawings. Figure 1 shows +Tif bonding semi-plastic aerated concrete bodies.
1 is a semi-plastic body cut into a flat plate, and a groove 2 with a semicircular cross section is formed at a desired position on the upper plane of the semi-plastic body.
Then, a groove 3 having a rectangular cross section is cut. 4 is another semi-plastic body cut into a flat plate shape, and F11S5 with a semicircular cross section and 1.56 with a rectangular cross section are cut on the lower plane at a position symmetrical to the upper surface of the semi-plastic body 1.

The semi-plastic bodies 1 and 4 are stacked so that their grooved surfaces are in contact with each other, and pressure is applied from the entire external surface of the semi-plastic bodies to integrate them, or the joint surfaces are bonded with the plastic body. Either apply an almost homogeneous paste, cement mortar, sodium silicate, silica sol, or other inorganic adhesive and apply a slight pressure, or stack them together without applying any pressure.

FIG. 2 shows a state in which the two semi-plastic bodies shown in FIG. 1 are integrated, and a hollow section 7 with a circular cross section and a hollow section 8 with a rectangular cross section are formed. The one shown in FIG. 3 is one in which only one semi-plastic body 9 is grooved and the other semi-plastic body 10 is overlapped and integrated without grooves.
The one shown in the figure is made by forming grooves on two or more semi-plastic bodies and integrating them.

After they are integrated, if they are cured with high temperature and high pressure steam according to a conventional method, the joint surfaces will be firmly bonded and a lightweight cellular concrete pawl having the desired hollow portion can be obtained.

〔Example〕

Example 1 A lightweight aerated concrete raw material slurry was poured into a formwork and foamed to semi-cure, and a steel ball with a hardness of 41 in diameter was dropped from a height of 50 from the surface of the semi-cured material to form a falling surface. When the diameter of the recess is 20 mm, cut the semi-plastic body with piano wire to obtain a width of BOCI111, thickness of 5 cm, and length of 2.
A plate-like semi-plastic body of 20 m in width and 2 semicircular grooves with a diameter of 20 mm on one side and 1 mm in width and 1 mm in depth.
One groove was cut at 10cm intervals, and this and another semi-plastic body with grooves cut at symmetrical positions were stacked together without using adhesive, and integrated by applying pressure from the top at 100g/cm2. Thereafter, it was steam-cured at 180° C. for 10 hours in an autoclave. When the bonded state of the bonded product was examined by cutting it, it was found that there was no gap between the bonded surfaces and the bonded product did not peel off even when subjected to impact.

Example 2 A slurry of the same composition as the semi-plastic body with a specific gravity of 1.3 was applied to the joint surface of a semi-plastic body similar to that of Example 1 with similar grooves cut in it at a ratio of 2 kg 1 m2 and overlapped. After joining and integrating, it was heated for 180 minutes in an autoclave.
Steam curing was performed at ℃ for 10 hours.

When the resulting product was cut and the bonded state was examined, it was found that there were no gaps between the bonded surfaces and that it did not peel off even when subjected to impact.

Example 3 Three semi-plastic bodies similar to Example 1 with a width of 20 mm and a depth of 1
After cutting the grooves of the 0 parts at the corresponding positions shown in Fig. 4 and putting them together, pressurizing them from the top with 100 g/c port 2 to integrate them, they were heated in an autoclave at 180°C + (steam-cured for 1 hour). When the product was cut and the bonded state was examined, there was no gap between the bonded surfaces and the product did not peel off even when a force of 7 was applied.

〔effect〕

- As explained in detail, according to the present invention, even if the lightweight aerated concrete panel having a hollow part is long, the hollow part of the desired shape can be arranged with high positional accuracy, and manufacturing is easy. Do you offer products at low prices? ) has a great effect.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of an example of the state before bonding of the semi-plastic body during the production of lightweight aerated concrete panels according to the present invention, Fig. 2 is a cross-sectional view of the semi-plastic body of Fig. 1 in a state in which the semi-plastic body is bonded, and Fig. 3 4 and 4 are cross-sectional views of other embodiments. 1.4, 9.10... Semi-plastic body, 7... Hollow part with circular cross section, 8... Hollow part with rectangular cross section. Patent applicant Sumitomo Metal Mining Co., Ltd.

Claims (1)

[Claims] After cutting grooves on one or both opposing sides of multiple semi-plastic aerated concrete bodies cut into flat plates and joining them,
A method for manufacturing a lightweight aerated concrete panel having a hollow portion, characterized by curing with high temperature and high pressure steam.