JPH02271977A - Method for curing cement product - Google Patents

Abstract

PURPOSE:To enable uniform curing by piling up unhardened plate-shaped cement products, interposing heat conductive hollow metallic plates every time a proper number of the cement products are piled up and subjecting the cement products to wet heat curing. CONSTITUTION:Unhardened plate-shaped cement products P are piled up and heat conductive hollow metallic plates B each having plural through holes A, A pierced in the longitudinal direction are interposed every time a proper number of the cement products P are piled up. The cement products P are then subjected to wet heat curing.

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a method for curing cement products.

[Conventional technology]

Conventionally, building boards have been widely manufactured using cement as the main raw material, and these boards are generally heat-cured in order to develop their final strength.

When carrying out such thermal curing, it is sometimes necessary to cure a large amount of board materials, so a large number of board materials are stacked and brought into the curing chamber.

[Problems with conventional technology]

However, due to the large number of boards to be cured,
When the number of stacked boards is increased, there is a problem that the temperature is not sufficiently distributed in the center of the middle part of the stack due to the heat capacity of the boards, making it impossible to achieve uniform curing, and there is a certain limit to mass production. There were problems that arose.

(Problems to be solved by the invention) In view of the above-mentioned problems, this invention solves the problem even when a large amount of plate material is used.
- This was developed with the aim of obtaining an efficient curing method for cement products that can be cured under uniform conditions.

(Technology that has solved the problem) That is, in the cement product curing method of the present invention, when unhardened plate-shaped cement products are stacked and cured under heat, a hollow hole with good heat conductivity is inserted into each stack for each suitable number of stacked cement products. It is characterized by the insertion of a metal plate.

[Effect]

When a large number of plates are stacked on top of each other at the same time, they form an object that is substantially the same as a solid object that has a total heat capacity of one.

Therefore, by reducing the stacking thickness of the stacked plates, these heat capacities can be significantly reduced.

So, the stacking load Jγ of each stacked board material is made small,
If a hollow metal plate with good heat conductivity is inserted between these, the conduction throughout the whole can be achieved and curing under uniform conditions can be achieved.

Furthermore, if a predetermined number of hollow metal plates are inserted, it is possible to cure under uniform conditions even if many layers of plate materials are stacked.

〔Example〕

Next, the present invention will be explained in detail.

As shown in Figure 1, 30 uncured cement boards P, each 300 cm long and 90 cm thick and 12 mm thick, are stacked one on top of the other, with a thickness of 2 cm between them, N 330 cm, and 100 cm wide.
cm, hollow hole A penetrating through the wall thickness in the length direction, A is 5
Hollow tubes bored adjacent to each other were inserted every 11 fiI, and the stacks were stacked to a final height of 190 cm, and heat-cured at 60° C. for 20 hours in an autoflave.

As a comparative example, 150 uncured board materials were stacked and cured at the same time without using any hollow m temporary B.

The temperature rise measured by the warm melon sensor at the center of the stacked plate area was as shown in Figure 2.

〔effect〕

As explained above, in this invention, a good heat conductor is inserted between the stacked plates, so heat is easily distributed throughout the stack, enabling uniform curing, and making quality control extremely easy. .

[Brief explanation of drawings]

Claims (1)

[Claims] (1) A method for curing cement products, which is characterized in that when stacking uncured cement products in the form of moist heat, a hollow metal plate with good heat conductivity is inserted between an appropriate number of stacked cement products.