CEMENT-BASED TILE

1 . A cement-based tile formed from a mixture comprising:

a cement in the range of about 0.1 to 88% by wet weight percent;

a secondary material in the range of about 0.1 to 50% by wet weight percent, the secondary material comprising limestone, sand, silica sand, gypsum, silica fume, fumed silica, Plaster of Paris, calcium carbonate, fly ash, slag, rock, or a combination thereof;

a reinforcement fiber in the range of about 0.5 to 20% by wet weight percent, the reinforcement fiber comprising cellulose fiber, glass fiber, plastic fiber, polypropylene fiber, polyvinyl alcohol (PVA) fiber, homopolymer acrylic fiber, alkali-resistant fiber, or a combination thereof;

a rheology modifying agent in the range of about 0.5 to 10% by wet weight percent;

a water in the range of 10 to 60% of a total wet material weight; and

wherein the mixture is extruded or molded to form the cement-based tile.

2 . The cement-based tile as recited in claim 1 , wherein the cement contains gypsum.

3 . The cement-based tile as recited in claim 1 , further comprising a color pigment in the range of about 0.1 to 5% by wet weight percent.

4 . The cement-based tile as recited in claim 1 , further comprising a retarder in the range of 0.1 to 8% by wet weight percent.

5 . The cement-based tile as recited in claim 1 , wherein the mixture has a clay-like consistency.

6 . The cement-based tile as recited in claim 1 , wherein the rheology modifying agent comprises a polysaccharide, a polysaccharide derivative, a protein, a protein derivative, a synthetic organic material, a synthetic organic material derivative, or a combination thereof.

7 . The cement-based tile as recited in claim 1 , wherein the cement-based tile has a density in the range of about 1.4 to 2.4 g/cm 3 , a compressive strength in the range of about 5 MPa to 100 MPa, and a flexural strength in the range of about 5 to 35 MPa.

8 . The cement-based tile as recited in claim 1 , wherein the secondary material is calcium carbonate or silica sand.

9 . The cement-based tile as recited in claim 1 , wherein the reinforcement fiber is PVA fiber.

10 . The cement-based tile as recited in claim 1 , wherein the cement-based tile comprises a roofing tile, a wall tile or a floor tile.

11 . The cement-based tile as recited in claim 1 , wherein:

the cement is in the range of about 40 to 55% by wet weight percent;

the secondary material is in the range of about 20 to 40% by wet weight percent;

the reinforcement fiber is in the range of about 1 to 5% by wet weight percent;

the rheology modifying agent is in the range of about 0.5 to 2.5 by wet weight percent; and

the water in the range of 15 to 25% of the total wet material weight.

12 . The cement-based tile as recited in claim 1 , wherein:

the cement is in the range of about 45 to 50% by wet weight percent;

the secondary material is in the range of about 28 to 30% by wet weight percent;

the reinforcement fiber is in the range of about 1.9 to 2.1% by wet weight percent;

the rheology modifying agent is in the range of about 1.5 to 1.7 by wet weight percent; and

the water in the range of 18 to 20% of the total wet material weight.

13 . A cement-based tile formed from a mixture consisting essentially of:

a cement in the range of about 0.1 to 88% by wet weight percent;

a secondary material in the range of about 0.1 to 50% by wet weight percent, the secondary material comprising limestone, sand, silica sand, gypsum, silica fume, fumed silica, Plaster of Paris, calcium carbonate, fly ash, slag, rock, or a combination thereof;

a reinforcement fiber in the range of about 0.5 to 20% by wet weight percent, the reinforcement fiber comprising cellulose fiber, glass fiber, plastic fiber, polypropylene fiber, polyvinyl alcohol (PVA) fiber, homopolymer acrylic fiber, alkali-resistant fiber, or a combination thereof;

a rheology modifying agent in the range of about 0.5 to 10% by wet weight percent;

a water in the range of 10 to 60% of a total wet material weight; and

wherein the mixture is extruded or molded to form the cement-based tile.

14 . The cement-based tile as recited in claim 13 , wherein the cement contains gypsum.

15 . The cement-based tile as recited in claim 13 , further comprising a color pigment in the range of about 0.1 to 5% by wet weight percent.

16 . The cement-based tile as recited in claim 13 , further comprising a retarder in the range of 0.1 to 8% by wet weight percent.

17 . The cement-based tile as recited in claim 13 , wherein the mixture has a clay-like consistency.

18 . The cement-based tile as recited in claim 13 , wherein the rheology modifying agent comprises a polysaccharide, a polysaccharide derivative, a protein, a protein derivative, a synthetic organic material, a synthetic organic material derivative, or a combination thereof.

19 . The cement-based tile as recited in claim 13 , wherein the cement-based tile has a density in the range of about 1.4 to 2.4 g/cm 3 , a compressive strength in the range of about 5 MPa to 100 MPa, and a flexural strength in the range of about 5 to 35 MPa.

20 . The cement-based tile as recited in claim 13 , wherein the secondary material is calcium carbonate or silica sand.

21 . The cement-based tile as recited in claim 13 , wherein the reinforcement fiber is PVA fiber.

22 . The cement-based tile as recited in claim 13 , wherein the cement-based tile comprises a roofing tile, a wall tile or a floor tile.

23 . The cement-based tile as recited in claim 13 , wherein:

the cement is in the range of about 40 to 55% by wet weight percent;

the secondary material is in the range of about 20 to 40% by wet weight percent;

the reinforcement fiber is in the range of about 1 to 5% by wet weight percent;

the rheology modifying agent is in the range of about 0.5 to 2.5 by wet weight percent; and

the water in the range of 15 to 25% of the total wet material weight.

24 . The cement-based tile as recited in claim 13 , wherein:

the cement is in the range of about 45 to 50% by wet weight percent;

the secondary material is in the range of about 28 to 30% by wet weight percent;

the reinforcement fiber is in the range of about 1.9 to 2.1% by wet weight percent;

the rheology modifying agent is in the range of about 1.5 to 1.7 by wet weight percent; and

the water in the range of 18 to 20% of the total wet material weight.