Dry cement mixture

Patent metadata

Field	Value
Publication number	US-9963390-B2
Application number	US-201515326879-A
Country	US
Kind code	B2
Filing date	Jun 23, 2015
Priority date	Jul 17, 2014
Publication date	May 8, 2018
Grant date	May 8, 2018

Abstract

A dry cement mixture comprises Portland cement and an ultra-fine component consisting of at least one ultra-fine additive, said ultra-fine component being a hydraulic binder, wherein Portland cement is present in an amount of at least 70 wt % of the mixture and the ultra-fine component is present in an amount of at least 5 wt % of the mixture, wherein the ultra-fine component has a particle size distribution characterized by a particle diameter D 10 of between 0.5 μm and 2 μm and a particle diameter D 90 of between 2 μm and 8 μm.

First claim

The invention claimed is:

1. A dry cement mixture comprising
(a) at least 70 wt % of Portland cement; and
(b) at least 5 wt % of an ultra-fine component, which is different than the (a) Portland cement, consisting of at least one ultra-fine additive, said ultra-fine component being a hydraulic binder that contains slag,
the ultra-fine component having a particle size distribution characterized by a particle diameter D 10 of between 0.5 μm and 2 μm and a particle diameter D 90 of between 2 μm and 8 μm, and
the at least one ultra-fine additive containing slag in an amount of >70 wt. %.

2. The dry cement mixture according to claim 1 , wherein the Portland cement is present in an amount of at least 80 wt. % of the dry cement mixture.

3. The dry cement mixture according to claim 1 , wherein Portland cement is present in an amount of 70-79 wt. % of the dry cement mixture.

4. The dry cement mixture according to claim 1 , wherein
the Portland cement is present in an amount of at least 85 wt. % of the dry cement mixture; and
the ultra-fine component is present in an amount of at least 7 wt. % of the dry cement mixture.

5. The dry cement mixture according to claim 1 , wherein the weight ratio of Portland cement and the ultra-fine component is between 85/15 and 95/5.

6. The dry cement mixture according to claim 1 , wherein the ultra-fine component has a particle size distribution characterized by a particle diameter D 10 of between 0.7 μm and 1 μm.

7. The dry cement mixture according to claim 1 , wherein the ultra-fine component has a particle size distribution characterized by a particle diameter D 90 of between 4 μm and 6 μm.

8. The dry cement mixture according to claim 1 , wherein the ultra-fine component has a particle size distribution characterized by a particle diameter D 100 of 10 μm-15 μm.

9. The dry cement mixture according to claim 1 , wherein the Portland cement has a particle size distribution characterized by
a particle diameter D 10 of between 1 μm and 3 μm, and
a particle diameter D 90 of between 30 μm and 60 μm.

10. The dry cement mixture according to claim 1 , wherein the Portland cement is a CEM I cement according to EN 197-1.

11. The dry cement mixture according to claim 1 , wherein the slag comprises ground blast furnace slag.

12. The dry cement according to claim 1 , wherein
the ultra-fine component has a particle size distribution characterized by
a particle diameter D 10 of between 0.7 μm and 1 μm,
a particle diameter D 90 of between 4 μm and 6 μm, and
a particle size distribution characterized by a particle diameter D 100 of (i) 10 μm-15 μm;

the Portland cement has a particle size distribution characterized by
a particle diameter D 10 of between 1 μm and 3 μm, and
a particle diameter D 90 of between 30 μm and 60 μm; and
wherein the weight ratio of Portland cement to the ultra-fine hydraulic component is
between 85/15 and 95/5.

13. The dry cement according to claim 1 , wherein the at least one ultra-fine additive is comprised of slag in an amount of >80 wt. %.

14. The dry cement according to claim 13 , wherein the Portland cement is present in an amount of at least 85 wt. % of the dry cement mixture.

15. The dry cement mixture according to claim 1 , wherein the Portland cement is present in an amount of at least 90 wt. % of the dry cement mixture.

16. The dry cement mixture according to claim 1 , wherein the weight ratio of Portland cement and the ultra-fine component is about 90/10.

17. The dry cement mixture according to claim 1 , wherein the Portland cement has a particle size distribution characterized by
a particle diameter D 10 of between 1.6 μm and 2 μm, and
a particle diameter D 90 of between 35 and 45 μm.

18. The dry cement according to claim 12 , wherein the Portland cement has a particle size distribution characterized by
a particle diameter D 10 of 1.6 μm and 2 μm,
a particle diameter D 90 of between 35 and 45 μm.

19. A concrete composition comprising (a) a cement mixture according to claim 1 ; (b) aggregates; and (c) water.

20. A construction element comprising concrete produced by curing a concrete composition according to claim 19 .

Assignees

• Holcim Technology Ltd
• Holcim Technology Ltd

Inventors

• Hoornaert Thomas
• Gonichon Stephane
• Vrau Delphine
• Mahouche Hubert
• Baalbaki Moussa
• Babayan David

Classifications

• C04B7/02

  Portland cement · CPC title

• C04B28/08 Primary

  Slag cements · CPC title

• C04B28/04 Primary

  Portland cements · CPC title

• C04B18/02

  Agglomerated materials {, e.g. artificial aggregates} · CPC title

• C04B20/0076

  characterised by the grain distribution · CPC title