Fiber reinforced cementitious composition

Patent metadata

Field	Value
Publication number	US-9862641-B2
Application number	US-201715441179-A
Country	US
Kind code	B2
Filing date	Feb 23, 2017
Priority date	Feb 23, 2016
Publication date	Jan 9, 2018
Grant date	Jan 9, 2018

Abstract

Disclosed herein is a fiber reinforced cementitious composition comprising a cementitious binder and at least one synthetic inorganic reinforcing fiber type, wherein the synthetic inorganic reinforcing fiber type comprises at least one of a man-made mineral fiber type such as basalt fibers, an aluminosilicate wool fiber type or an alkaline earth silicate wool fiber type.

First claim

What is claimed is:

1. A fiber reinforced cementitious composition comprising:
a cementitious binder;
about 0.1% to 9% by weight amorphous fibers derived from basalt comprising silicon dioxide (SiO 2 ) and aluminum oxide (Al 2 O 3 ), wherein the amorphous fibers derived from basalt have a length between 3 and 15 mm and a diameter between 8 and 50 μm;
at least one filler;
about 0.1 to 8% by weight organic reinforcing fibers;
wherein the amorphous fibers derived from the basalt are dispersed in the cementitious binder.

2. The fiber reinforced cementitious composition of claim 1 , wherein the organic reinforcing fibers comprise cellulose fibers.

3. The fiber reinforced cementitious composition of claim 1 , further comprising alumina trihydrate.

4. The fiber reinforced cementitious composition of claim 1 , wherein the fillers comprise a density modifying filler.

5. The fiber reinforced cementitious composition of claim 1 , wherein the fillers are selected from the group consisting of ground silica sand, ground silica rock, silica flour, silica fume, clays, partially dehydroxylated clays, carbonate man-made minerals, oxide man-made minerals, and aluminosilicate man-made minerals.

6. The fiber reinforced cementitious composition of claim 1 , wherein the fiber reinforced cementitious composition further comprises polymer fibers.

7. The fiber reinforced cementitious composition of claim 6 , wherein the polymer fibers are selected from the group consisting of fibers of polypropylene, and polyvinyl alcohol.

8. A fiber reinforced cementitious composition comprising about 20 to 45% by weight cementitious binder, about 35 to 68% by weight of at least one filler, about 0.1% to 9% by weight basalt fibers, about 3 to 8% by weight cellulose fibers, about 0 to 8% by weight of at least one density modifying filler, about 0 to 6% by weight of at least one or more additive(s).

9. The fiber reinforced cementitious composition of claim 8 , wherein the fiber reinforced cementitious composition further comprises polymer fibers.

10. The fiber reinforced cementitious composition of claim 9 , wherein the polymer fibers are selected from the group consisting of fibers of polypropylene, or polyvinyl alcohol.

11. The fiber reinforced cementitious composition of claim 10 , wherein the polymer fibers have a diameter of about 20 to 100 μm.

12. The fiber reinforced cementitious composition of claim 8 , wherein the amorphous fibers derived from basalt have a length between 3 and 15 mm, and a diameter between 8 and 50 μm.

13. The fiber reinforced cementitious composition of claim 8 , wherein the at least one filler is at least partially reactive with the cementitious binder.

14. The fiber reinforced cementitious composition of claim 8 , wherein the at least one density modifying filler is at least partially reactive with the cementitious binder.

15. The fiber reinforced cementitious composition of claim 8 , wherein the at least one density modifying filler is selected from the group consisting of: cenospheres, synthetic microspheres, calcium silicate, fully expanded perlite, partially expanded perlite, mica, vermiculite, clay, and combinations thereof.

16. The fiber reinforced cementitious composition of claim 8 , wherein the at least one additive(s) comprise alumina trihydrate.

17. The fiber reinforced cementitious composition of claim 8 , wherein the cementitious binder comprises Portland cement.

18. The fiber reinforced cementitious composition of claim 8 , wherein the cellulose fibers have a diameter between about 20 to 50 μm.

19. The fiber reinforced cementitious composition of claim 8 , wherein the cellulose fibers have a length between about 2 and 7 mm.

Assignees

• Hardie James Technology Ltd

Inventors

• Anast Maree
• Liu Xiangyuan
• Mcquerrey Brian
• Parakala Padmaja
• Silva Leonard

Classifications

• C04B16/02

  Cellulosic materials (cellulosic waste materials, e.g. sawdust, rice husks, C04B18/24) · CPC title

• C04B22/06

  Oxides, Hydroxides (C04B22/0013 takes precedence) · CPC title

• C04B28/02

  containing hydraulic cements other than calcium sulfates · CPC title

• C04B16/0633

  Polypropylene · CPC title

• C04B16/0641

  Polyvinylalcohols; Polyvinylacetates · CPC title