Method for fabricating fiber-reinforced slag gypsum cement-based, lightweight set articles
First Claim
1. A method for making a fiber-reinforced slag gypsum cement lightweight hardened product which consists essentially of the steps of:
- adding from 5 to 140 parts by weight of aggregates having a maximum size of not larger than 2000 μ
m to 100 parts by weight of a mixture which comprises 100 parts by weight of Portland cement, from 20 to 350 parts by weight of slag fine powder which has a fineness ranging from 6,000 to 12,000 cm2 /g as Blaine'"'"'s specific surface area, from 0 to 20 parts by weight of lime, and from 20 to 100 parts by weight of calcium aluminate and gypsum fine powder in total, provided that a ratio by weight of the gypsum fine powder and the calcium aluminate is in the range of 0.5 to 2.0;
1;
adding from 0.01 to 1.5 parts by weight of a setting retardant to the mixture;
mixing water, prefoamed foams and reinforcing fibers with the mixture to obtain a slurry;
subjecting the slurry to molding to obtain a molded product;
removing the molded product to obtain a hardened product; and
curing the hardened product with steam;
wherein the amount of the prefoamed foams to be added to the slurry is the amount necessary to obtain a hardened product having an air-dried specific gravity of from 0.4 to 1.5.
1 Assignment
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Accused Products
Abstract
A method is provided for making a fiber-reinforced slag gypsum cement lightweight hardened product. The method consists essentially of mixing (1) from 5 to 140 parts by weight of aggregates having a maximum size of not larger than 2000 μm to (2) 100 parts by weight of a mixture which comprises 100 parts by weight of Portland cement, (3) from 20 to 350 parts by weight of slag fine powder which has a fineness ranging from 6,000 to 12,000 cm2 /g as Blaine'"'"'s specific surface area, (4) from 0 to 20 parts by weight of lime, (5) from 20 to 100 parts by weight of calcium aluminate and gypsum fine powder, (6) 0.01 to 1.5 parts of a setting retardant; mixing water, prefoamed foams and reinforcing fibers with the mixture to obtain a slurry; subjecting the slurry to molding to obtain a molded product; removing the molded product to obtain a hardened product; and curing the hardened product with steam. In the method of the invention, the slurry sets and hardens within a short time, permitting the hardened product to be immediately removed from a mold.
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Citations
16 Claims
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1. A method for making a fiber-reinforced slag gypsum cement lightweight hardened product which consists essentially of the steps of:
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adding from 5 to 140 parts by weight of aggregates having a maximum size of not larger than 2000 μ
m to 100 parts by weight of a mixture which comprises 100 parts by weight of Portland cement, from 20 to 350 parts by weight of slag fine powder which has a fineness ranging from 6,000 to 12,000 cm2 /g as Blaine'"'"'s specific surface area, from 0 to 20 parts by weight of lime, and from 20 to 100 parts by weight of calcium aluminate and gypsum fine powder in total, provided that a ratio by weight of the gypsum fine powder and the calcium aluminate is in the range of 0.5 to 2.0;
1;adding from 0.01 to 1.5 parts by weight of a setting retardant to the mixture; mixing water, prefoamed foams and reinforcing fibers with the mixture to obtain a slurry; subjecting the slurry to molding to obtain a molded product; removing the molded product to obtain a hardened product; and curing the hardened product with steam; wherein the amount of the prefoamed foams to be added to the slurry is the amount necessary to obtain a hardened product having an air-dried specific gravity of from 0.4 to 1.5. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of making a fiber-reinforced slag gypsum cement lightweight hardened product which consist essentially of the steps of:
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adding from 5 to 140 parts by weight of aggregates having a maximum size of not larger than 2000 μ
m to 100 parts by weight of a mixture which comprises 100 parts by weight of Portland cement, from 20 to 350 parts by weight of slag fine powder, from 0 to 20 parts by weight of lime, and from 20 to 100 parts by weight of calcium aluminate and gypsum fine powder in totalL provided that a ratio by weight of the gypsum fine powder and the calcium aluminate is in the range of 0.5 to 2.0;
1;adding from 0.01 to 1.5 parts by weight of a setting retardant to the mixture; mixing water, foaming agent and reinforcing fibers with the mixture to obtain a slurry; subjecting the slurry to molding to obtain a molded product; removing the molded product to obtain a hardened product; and curing the hardened product with steam; wherein the amount of the foaming agent to be added to the slurry is the amount necessary to obtain a hardened product having an air-dried specific gravity of from 0.4 to 1.5. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification