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1. (WO2018065520) METHODS FOR PRODUCING AIR-CURED FIBER CEMENT SHEETS
注意: このテキストは、OCR 処理によってテキスト化されたものです。法的な用途には PDF 版をご利用ください。

CLAIMS

1. A method for the production of air-cured fiber cement products, at least comprising the steps of:

(a) Providing cured fiber cement powder by comminuting cured fiber cement material;

(b) Providing an aqueous fiber cement slurry comprising water, cementitious binder, natural or synthetic fibers and said cured fiber cement powder;

(c) Providing a green fiber cement sheet;

(d) Pressing said green fiber cement sheet;

(e) Air-curing said compressed fiber cement sheet thereby providing an air-cured fiber cement product.

2. The method according to claim 1, wherein said step (d) of pressing the green fiber cement sheet comprises compressing the green fiber cement sheet with a pressure of between about 180 kg/cm2 and about 250 kg/cm2.

3. The method according to any of claims 1 or 2, wherein said step (d) of pressing the green fiber cement sheet comprises compressing said green fiber cement sheet during a time period of between about 5 minutes and about 15 minutes.

4. The method according to any of claims 1 to 3, wherein said step (d) of pressing the green fiber cement sheet comprises compressing said green fiber cement sheet by means of at least one or more mechanical presses.

5. The method according to any of claims 1 to 4, wherein said step (d) of pressing the green fiber cement sheet comprises compressing said green fiber cement sheet by means of at least one or more stack presses.

6. The method according to any of claims 1 to 5, wherein said step (a) of providing cured fiber cement powder comprises comminuting an air-cured fiber cement product.

7. The method according to any of claims 1 to 5, wherein said step (a) of providing cured fiber cement powder comprises comminuting an autoclave-cured fiber cement product.

8. The method according to any of claims 1 to 7, wherein said step (a) of providing cured fiber cement powder comprises comminuting a cured fiber cement product by using a pendulum mill.

9. The method according to any of claims 1 to 8, wherein said step (b) comprises mixing at least water, cementitious binder, natural or synthetic fibers and said cured fiber cement powder, wherein said cured fiber cement powder is present in said aqueous fiber cement slurry in an amount of between about 5M% and about 40M% of the dry basis of said slurry.

10. The method according to any of claims 1 to 9, wherein said step (b) comprises mixing at least water, cementitious binder, natural or synthetic fibers and said cured fiber cement powder, wherein said cured fiber cement powder is present in said aqueous fiber cement slurry in an amount of between about 5M% and about 15M% of the dry basis of said slurry.

11. An air-cured fiber cement product obtained using the methods according to any of claims 1 to 10.

12. The air-cured fiber cement product according to claim 11, which is a corrugated fiber cement sheet.

13. Use of the air-cured fiber cements product according to any of claims 11 or 12 as a building material.