JPS6083808A - Manufacture of asbestos cement group building board - 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 lighting technology] The present invention relates to asbestos-cement-based d used as roofing materials, etc.
The present invention relates to a method for manufacturing a second plate.

[Background technology]

Temporary construction RT made of asbestos and cementite, used as roofing materials, etc., has been conventionally produced in the following manner. That is, a slurry is prepared by scraping asbestos and dispersing it in water together with fillers such as cement and silica powder, and paper-making aids such as pulp. The wet machining paper is then printed onto the felt by printing it out and transferring it onto the felt.
Wrap several bundles around a plastic wrapper to make a clean sheet, and when the clean sheet reaches an appropriate thickness, it can be used as a
One piece is cut from the plastic, pressed and dehydrated, then corrugated or uneven patterns are applied as required, and after this is finished, it is finished and made into a product.In this case, The steepness of f18 or more of the vat dyeing board is made by asbestos, but asbestos is oriented in the papermaking direction (the rotational direction of the papermaking mill: /ter) when the stone 71J8 cement slurry is made into paper. Therefore, construction boards can hardly be expected to be reinforced against cracks parallel to the papermaking direction. A construction board was created in which a reinforcing layer was sandwiched in the first layer.In other words, the reinforcing layer was formed by dispersing cement paste in which reinforced RJM fibers were dispersed. The fibers are oriented in the same random direction,
These reinforcing fibers can provide reinforcement against cracks parallel to the papermaking direction of the 4-dye board. In this case, when reinforcing fibers such as fibers are dispersed in the cement slurry, the reinforcing fibers are dispersed in the cement slurry. 1. The reinforcing fibers tend to be scattered on the mat, and the retention force of the reinforcing fibers is weak, so the brush O-
]1. During the spraying process, the reinforcing fibers were separated from the cement and were accidentally sprayed in their raw form. Therefore, in these cases, uneven distribution of the reinforcing fibers and a decrease in the adhesion strength of the IMJ between the reinforcing fibers and the layer formed by wet machining will occur, and the reinforcing effect will not be sufficient and JC on the fJ board (construction) will occur.
There is a problem that separation occurs.

In order to solve these problems every month, it has been conventional practice to add asbestos as a dispersion aid to the cement slurry in which reinforcing fibers such as fibers are dispersed. By incorporating asbestos into the cement slurry as a dispersion aid in this way, the above problems can be solved, but recently, asbestos (source problem, pollution problem 11!1) It is our desire to reduce this.

[Objective of the present invention] The present invention does not go beyond the above points, and
There is no need to use asbestos as a dispersion aid.
．． ．． The purpose is to share the #1 method of the G-cotton cement series Qin board, which enables the spraying of reinforcing fibers such as jv, suzuri, etc., in a well-dispersed state in the cement. It is something.

[Disclosure of the invention]

Therefore, the method for manufacturing the asbestos cement slurry 11') according to the present invention is to transfer the asbestos cement slurry 11') onto a Fell f21, and form a wet mat 13) on the Fell Ib (2). Me + Y Jiro 11z i411
After wrapping it around the fC committee, cut out the clean sheet (5) on which the wet mat 3) was found to have multiple faults and cut it out from Mae Ten Jiro 114175 Island and make this clean sheet 15.
) was pressed and cured to produce asbestos-cement construction J1 boards by felting cement slug IJ-(6) with reinforcing fibers dispersed and blended with the full crushing power of asbestos-cement product waste. 2) The special feature is that the above sea urchins are sprayed on top of the sea urchin (3).Hereinafter, the present invention will be explained in detail. , 8tS1 shows an example of the device used in the present invention.
2) is seen in the shape of an infinite (1'j) and is even driven by the O-le (10).In addition, asbestos cement slurry (tlj force) is contained in the asbestos cement slurry (tlj force) in the It is fed and filled (7) with a paper-made bat (the river is made of felt (
2) The number of bells is provided on the F side of each papermaking bar.
Inside, there is a paper-made syringe such as a circular net type syringe (112), which can be rotated once and can be moved freely. Also provided is a meter 0-11 shoulder 4) which is rotated while touching a part of the felt (2). and felt 15) upper IM
A dispersing device (9) is installed in the area. The scattering device (9) is composed of an i'iji cloth pad 13) in which reinforcing fibers are dispersed and filled with the mento slurry (6), and a scattering roll 14) which can be freely rotated.

Asbestos-cement slurry (11f) is prepared by dissolving asbestos and dispersing it in water together with fillers such as meth and silica sand, pulp, etc., and supporting agents. If necessary, reinforcing fibers such as organic fibers and carbon fibers are added in portions. The asbestos cement slurry (1) is then drawn up by a papermaking cylinder L12) and transferred onto the surface of the felt 2). In this way, the wet machining machine +3N, 1 felt 2), which has been cut on the surface of the felt 2), is moved in a regular manner and the main rollers 0 to 14) are rotated to make a mechanical roll (4).
wrapped around the outer circumference of the Wet mats 3) are generally 3 ply to 10 ply (5 ply to 10 ply)
(4) is good (=, it is something that is rejected, but mail +
Wet mat Iυt I wrapped around Cyclor (4)
A reinforcing and fiber-dispersed semecit slurry (6) is sprayed onto a portion of the membrane 3) by a spraying device (9). here,
As reinforcing fibers, organic fibers such as J20: J1 Nairoshi and Polyzu0 Hiren are used. These reinforcing fibers have a length of 3 to 15 mm, a fineness of earth to convex denier (d), and a pull I& It is preferable to use a material with a strength of 52/d or more. This reinforcing fiber is dispersed in water with cement such as ordinary Poldrasite cement, blast furnace cement, fly ash cement, etc. to make cement slurry. Pulverized waste material from cement-based products is blended and dispersed as a reinforcement and fiber dispersion aid. As an asbestos-cemetite product, -1"J may be used as long as it is a mixture of asbestos and cement.
Uses waste U that is usually discarded. The crushed material of the tail phase of this asbestos filament yarn product exposes asbestos on the surface and some of the asbestos is separated from the cement.
This asbestos will function as a dispersion aid for reinforcing fibers in the cement slurry. , -1~3 mm), more preferably V~100~2000 pm (0
, 1 to 2 mm l is good. The composition of Cemeshito Slurry 1G) is 1-170 to 2.50 tons of asbestos, 20 to 50 parts by weight of pulverized asbestos product waste, 2 to 6 parts of reinforcing fiber, 150 to 200 tons of water. It is recommended to set it to . The cement slurry 16) with reinforcing fibers dispersed therein is then wrapped around the wet mat (4); spraying device, 9)
In this way, the reinforcing fiber fraction slurry - 6) - Mauni 1 Sotomat 13) spread over the wet mat + 31 on the felt 2) spreads over the wet mat + 31 on the felt. dν et al.7Lj
Then, as shown in FIG. 2, a wet mat is applied as a reinforcing layer 115).

When the wet mask I +31 is rolled up to 1 piece L, it is rolled to a suitable thickness on May 10-J 0 11r 141.
A clean sheet 15) is cut out from the main roll (4), and this clean sheet (5) is pressed and dehydrated, and if necessary, it is corrugated or has an uneven pattern.
It is then subjected to curing and finishing processing to produce the final product.

Then, as mentioned above, reinforcing fiber dispersed cement slurry (
When dispersing cement slurry (6), the reinforcing fibers are spread uniformly because the crushed B6 material of the asbestos cement product does not act as a dispersion aid. ) on the wet mat (3). In addition, the pulverized waste material of the asbestos cement product does not act as an aggregate, and in addition, the pulverized material makes the surface of the reinforcing layer 5) uneven, and this uneven surface makes the reinforcement layer 115) and the sea urchin mat +3 This can improve interlayer adhesion. In addition, the particle size of the crushed waste material of asbestos cement products is 100 to convex O.
As mentioned above, it is preferable that the asbestos has a diameter of OOμm, but if it is less than 100μm, the asbestos becomes fine particles and becomes powder, and its function as a dispersion aid and aggregate is not fully exerted. β000
If it exceeds μm, separation of asbestos from the cement matrix will be insufficient, and the function as a dispersion aid will be insufficient, and the particles will be too coarse, resulting in a reinforcing layer and a wet mat (3).
This results in a decrease in interlayer adhesion with the other layers.

Next, the present invention will be explained using an actual gun example.

Fruit @ l+l l The formulation shown in Table 1 was dispersed in water to prepare asbestos cement slurry, and this asbestos cement slurry was made into paper using the apparatus shown in FIG. On the other hand, reinforcing fiber dispersed cement slurry prepared according to the formulation shown in Table 2 was spread in the apparatus shown in FIG. 41. In this way, a clean sheet was obtained in which 1 piece of 41-0 sea urchin was laminated, the first layer of the third and fourth layer wet mats was reinforced, and the latch was sandy/sochied. This 5. Cut out the lean sheet and weigh 801g /
Press under the conditions of arfl -1.5 seconds, 60 ° C., 95
After primary curing under the conditions of 96 RH, 10 hours, secondary curing was performed in a chamber to obtain an asbestos-cement construction board with a board thickness of 5.5 rntr and a reinforcement l-thickness of Q, 2 men. .

Actual winding example 2 The same method as actual case 1 was used except that the composition shown in Table A2 was used as reinforcing fiber dispersed cement slurry, and the plate thickness was 5.5.
An asbestos-cemesite construction board with a reinforcing layer thickness of Q, l mm was obtained.

Gami Mshio υ Convex reinforcing fiber fraction The composition shown in Table 42 was used as the cement slurry.
．． A building block with a reinforcement layer of 0.2 mm and a thickness of 6 mm and a +1-thread construction plate was obtained.

IJf: As the fiber-dispersed cement slurry, I used the one in Table 2 as a cement slurry; So 61j strong Noah's j demi got O02・jm's crocodile → ゛dhiment type building board.

Comparative row reinforcing fiber fraction Cemesh slurry 7 and the formulation shown in Table 2 were used, except for actual Mq row 1 and co-worker, & thickness was 5.5
Maro has developed asbestos-cement construction boards with a reinforcement layer of 0.1 thickness.

(Table 1) Blend of asbestos cement slurry (2 tables per week) Blend of fan strong fiber dispersion slurry Sister series 1 above
~Convex, conventional example, comparative example 1 good for asbestos-based lining board, layer 1! ] Adhesive building ``Garden, bending and breaking joints Ij
Ls bending-j properties were measured. +Wj1...Adhesive strength d
For the l11 constant, glue the jig on both the front and back sides of the 2.5 closed x 2.5 cvr sample with Evo + Shi 1 sealant adhesive.
The bending fracture strength was measured by applying a load to both jigs and separating them.
．． The load was applied from the side opposite to the reinforcing layer, and the bending rigidity was 44.
The test was carried out using the IJX 6Qs system under the conditions specified by Subashi 5, and the load was applied from the side opposite to the reinforcing layer. The results are shown in Table 43.

From the results in Table 3, it can be seen that each actual gun 1911 is more equivocal than the comparative example that does not use a dispersion aid, and is equivalent to the conventional example that uses stone d6 as a dispersion aid. is confirmed (4417c IM l+ll J-13)
.

〔Effect of the invention〕

As described above, according to the present invention, reinforcing fibers can be well dispersed in the asbestos slurry by using the pulverized material of waste materials of asbestos and mesito-based materials as a dispersion aid. There is no need to use it as an agent, and it is resource saving. Moreover, since the waste materials of asbestos-cemetite-based products are usually made from waste beams, they can be easily obtained, reducing costs, and can also be recycled as an R source.

[Brief explanation of the drawing]

Fig. 1 is an outline v1 of the apparatus included in the present invention, and Fig. 2 is an enlarged view of a part of the same. ill is asbestos cement slurry・(2) is felt%1
3)" is a sea urchin t sitoma sort, +41r, I-+
y') [1l-ILz, +5i &icrisisheet, +61! 'i, m strong fiber dispersed cement slurry. Agent )p#i± Stone 1) Choshichi

Claims (1)

[Claims] +1] The asbestos-cement slurry was drawn up and transferred onto felt, and the wet pine on the felt was wrapped in several bundles around a mailer. In manufacturing asbestos-cement-based cotton construction boards by cutting clean sheets from Mayton rolls and press-curing the clean sheets,
Dispersing reinforcing fibers to crush and crush waste materials from asbestos-cemetite products.
A method for producing asbestos-cement Japanese music boards that involves spraying cement slurry mixed with asbestos on a wet felt board.