JPS5941217A - Manufacture of sheet for light foamed concrete construction - 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] Improvements in the construction of light aerated foamed concrete that has been cured in an autoclave and is used for temporary structures such as kotoake, partitions, outer footboards, field boards, and iron fences. Regarding the manufacturing method.

The currently produced ALCl sheet has a thickness of 100-
-It is more than A11j strong iron rib 5IIImφ or more. On the other hand, 0 people have a board thickness of 20~ in addition to the normal ALC board.
50-, an ALc thin plate reinforced with metal lath was developed and successfully put into practical use. About the person's LC thin plate and its manufacturing method;
This is the process disclosed in Japanese Patent Publication No. 48-17562, but to explain the main points, generally, water is added to and mixed with a foaming agent such as finely pulverized silicic acid material, lime/white matter, and whole steel aluminum. As shown in Fig. 1 and Fig. 42, set rods 1, which serve as supporting jigs, are placed at intervals on both sides of methyl lath 20, which serves as a reinforcing material.
This is then held and put into the formwork 5, and
Inject at the point indicated by line A and continue. Next, the slurry was made into 9 fll, expanded to a semi-hardened state as shown in line B, and then turned into a semi-hardened state.After that, the set plate 1 was pulled out, and then the mold was removed and cut along the metal lath 2.21L + 1 full cut Me. The slurry is manufactured by curing it in an autoclave.The reason to wait until the slurry is semi-hardened (a state in which holes for pulling out the set rod remain) is to set it while the slurry retains its fluidity. When drawing mt-, the metal lath moves in the slurry, and if the finished product plate thickness is 501 mm or less, the metal lath may be biased near the product surface, or in even worse cases, the metal lath may not fit within the plate thickness and the piano wire number This is because there is a risk that cutting 1 PIT due to fc may result in failure.

Once upon a time, a set 111 was removed along the reinforcing metal lath from the product manufactured by the above method!
Hole 4 remains where it has settled. In order to fill the holes 4, slurry or mortar having the same composition as the raw material may be injected, or
Alternatively, the raw material slurry should be press-fitted twice, and when the slurry from the first injection has hardened a little and the metal lath has become self-supporting, the set $1 should be pulled out, and if necessary -
1. Slurry injection methods have been devised, but these methods prolong production time, and it is not always easy to inject a sufficient amount of slurry or mortar into a small diameter and relatively long extraction hole. . Therefore, in the past, the extraction hole was left open without being re-lit.
In many cases, it was used as a final product.

By the way, many of the ALC thin plates for construction have a thickness of 50 mm. Then, as shown in Fig. 4, the longitudinal cross section F
i There is a metal lath 2 approximately in the center, and the extraction hole 4゜4 for the set rod 1 that is completely clamped therein also exists in the center and is relatively far from both surface layers, so even if the corners are temporarily chamfered, The hole 4°4 is rarely exposed to the chamfered portion that becomes a joint during use. However, the thickness of this ALO architectural thin plate is 3.
If the suction is less than 5 inches, there is a possibility that the extraction hole 4 of the set upholstery will be exposed at the chamfered part as shown in Figure 5, and the thinner the plate becomes, the more dense the nitrogen gap occupied by the extraction hole becomes. Since the gap increases relative to the area, it is preferable to fill this gap from the viewpoint of strength. Furthermore, it is essential to bury the metal lath as accurately as possible in the temporary center.

This invention was completed as a result of research to meet the above needs. This was done based on the knowledge obtained from a detailed study of the relationship between the changes in the state of foaming and hardening of the slurry after slurry pouring and the positional movement of the reinforcing metal lath. .

First, in order to determine the relationship between the passage of time after pouring the slurry and the positional movement of the reinforcing metal lath, we used a minute displacement measuring device IT to measure the length of the formwork 3 +t) shown in Figures 1 and 2. Changes in the distance PgD to the outer metal lath 2E were continuously measured electrically using swirl flow loss, and the slurry height at that time was also measured. An example of the results is shown in Figures 6 and 7, and it was revealed on Saturday that the following relationship existed.

Slurry composition V (although there may be slight differences from 1
．． In order to reach the foaming height of the Wt foot, it is deformed by pouring slurry, and then the deformation is completed in 50 minutes by making it convex outward. On the other hand, the slurry is highly predatory for about 30 minutes after foaming, and although it exhibits fluidity similar to that of a viscous liquid with a large specific gravity, the metal lath 21C remains stationary at the fixed position B, holding the metal lath 2E. Performance was recognized.

If you gently pull out Set God 1 in this state, the phenomenon is similar to pulling out Set 4 that has been stuck in the sand, and Set 41
It was fit M that the extraction hole 4 of No. 11 would be naturally filled by the slurry collapsing (referred to as self-collapsing property), and that the metal lath 2B would not change its position. That is,
Contrary to our expectations, new knowledge has been found that metal lath causes almost no change in volume even if the set is pulled out while the slurry is still fluid, and the extraction hole is filled by the self-collapsing property of the slurry. It was released.

Since the slurry is fluid when Cera) 4i11 is extracted, it is impossible to demold it, and in order to be able to demold and cut it, based on the knowledge that it is more than semi-hardened,
The inventors removed all of the setting support while the raw material slurry maintained its fluidity, made the slurry solid from the self-collapsing property of all the extraction holes of the support, and allowed the raw slurry to reach a semi-hardened state. After removing the mold, cutting it and curing it in an autoclave results in a plate with a thickness of 50.
, which is superior to the following lightweight cellular concrete construction thin plates:
He came up with a completely new invention.

The raw material slurry of the example consisted of 27 parts of Holtland cement, 6 parts of quicklime, 6 parts of powdered silica stone, 50 parts of recovered waste (solid fraction 17f5 [cutter cutting layer of semi-hard quality product]), and 0.08 parts of metal aluminum powder. !Wed 75 for 100 cities for iI type
A slurry was prepared by adding 1.0 parts and stirring.

The reinforcing metal lath has a mesh size of 16 x 32-1 wire diameter of 08 mm, and is placed in the formwork in parallel at intervals of 35 square meters, and is held in place by an inverted U-shaped holding rod with a diameter of 6 ropes. The divine bodies on both sides are placed on both sides of the metallass, and they are held between them.

The slurry was then poured into the mold. The crystallization of the slurry was 51.5 mm immediately after injection, but after 25 minutes
The mackerel length was 62 cm, which was almost constant.

- Distance of blade wheel 2 (Nm) D is approximately 1.5 to 0III
- displacement, and thereafter it was displaced to 111 degrees outside, and 40 minutes after injection, the displacement type was constant at 2.1N.

Then, 50 minutes after the injection, the set was gently pulled out.
As it was pulled out, the 9-hole hole naturally collapsed and was filled with slurry. The rice was silent for 2 hours and turned into a sword brother, 55
IIIl pitch +JJ, Toshishi, then Tsuji? After curing in an autoclave, the product of 11th period is superior /
child.

In particular, in the method of this invention, both sides of the metal lath have V?
- Since the stock picker is placed, only a thin holding rod is required, and the effect of quickly filling the hole that has been pulled out due to its disintegration can be expected.

[Brief explanation of the drawing]

Figures P81 and 2 are vertical and cross-sectional views showing the manufacturing state, and Figures 6, 4, and 5 are cross-sectional views of the product and R.
The floor plan E, Figures 6 and 7 are graphs of the measurement results of the slurry height and displacement of the metal lath. 1...Set rod, 2...Metal lath,
3...Formwork, 4...Extraction hole. Figure 1 Figure 2 Figure 3 Figure 5

Claims (1)

[Claims] (1) In the manufacturing method of lightweight aerated concrete construction thin plates with metal lath M reinforcing material embedded, the set support is placed on the side! 'The extraction hole of the support is made solid by the self-collapsing property of the raw material slurry,
And, the raw material slurry is allowed to semi-harden I, +, 14, then demolded, cut to a thickness of 53 m or less, and cured in an autoclave.
-Method for manufacturing architectural materials.