Claims
- 1. A method of producing corrugated self supporting roofing sheets which consist essentially of a mixture of cement, inert materials and synthetic fiber reinforcement in mesh form, with a rough top surface of granular material, comprising the steps of:
- preparing a mixture of cement, water and inert materials;
- supporting synthetic fibers in mesh form on a continuously advancing felt or cloth band;
- applying said mixture onto said mesh, forming a layer of suitable thickness which includes said mesh;
- applying a granular material onto the top surface of said layer before the cement has set;
- removing excess water from said layer;
- corrugating said layer;
- cutting said layer, thereby forming corrugated roofing sheets of desired length; and
- brushing the top surface of said sheets, after the cement has set, to remove unadhered granules of the granular material.
- 2. The method of claim 1, wherein the amount of synthetic fibers in said sheets is 2.0-3.5% by weight of the remaining solid material.
- 3. The method of claim 1, wherein said synthetic fibers are polypropylene fibers.
- 4. The method of claim 1, wherein said synthetic fibers have a diameter of 15-120 microns.
- 5. The method of claim 1, wherein said water removal is continued until the residual water content in said layer is 25-32% by weight.
- 6. The method of claim 1, wherein said granular material consists of mineral substances having a particle size of 0.5-1.5 mm in diameter.
- 7. The method of claim 1, wherein said granular material consists of limestone, marble, silica or granite.
- 8. The method of claim 1, wherein said granular material is applied to said top surface in a quantity of 500-1000 g/m.sup.2.
Priority Claims (1)
Number |
Date |
Country |
Kind |
21920[U] |
Jul 1987 |
ITX |
|
Parent Case Info
This is a Continuation of application Ser. No. 07/208,482 filed June 20, 1988 now abandoned.
US Referenced Citations (10)
Foreign Referenced Citations (7)
Number |
Date |
Country |
361630 |
Jul 1929 |
BEX |
545108 |
Feb 1956 |
BEX |
2447286 |
Apr 1976 |
DEX |
2127468 |
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FRX |
2389583 |
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FRX |
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GBX |
634793 |
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GBX |
Continuations (1)
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Number |
Date |
Country |
Parent |
208482 |
Jun 1988 |
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