# US 9,434,646 B2 · Phosphorus-doped sulfo-belitic clinker

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- Number: US 9,434,646 B2
- Document ID: US9434646B2
- Status: Granted
- Kind: B2
- Application number: 14/776,990
- Filed: 2014-03-13
- Published: 2016-02-04
- Granted: 2016-09-06
- Earliest claimed: 2013-03-15
- Assignees: Vicat
- Applicants: Vicat
- Inventors: Michel Pasquier; Laury Barnes-Davin; Pascal Meric; Guy Beauvent
- Web page: https://patentgrep.com/patent/US9434646B2

## CPC

- C04B 7/323: {Calcium aluminosulfate cements, e.g. cements hydrating into ettringite}
- C04B 7/3453: {Belite cements, e.g. self-disintegrating cements based on dicalciumsilicate}
- C04B 28/065: {Calcium aluminosulfate cements, e.g. cements hydrating into ettringite}
- C04B 2111/00215: {Mortar or concrete mixtures defined by their oxide composition}
- Y02P 40/10: Production of cement, e.g. improving or optimising the production methods; Cement grinding
- C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

A new phosphorus-doped sulfo-belite-based clinker, a method for preparing this clinker, as well as the use of the clinker for preparing a hydraulic binder and, later on, grout, concrete or mortar.

## Claims

### Claim 1

A sulfo-aluminate-based clinker, having a phase composition, with respect to the total weight of the clinker, comprising:
from 5 to 60% of an iron-doped calcium sulfo-aluminate phase corresponding to a formula represented by C4AxFy$zwith:
x varying from 2 to 3,
y varying from 0.05 to 0.5, and
z varying from 0.8 to 1.2;
from 0 to 25% of a calcium aluminoferrite phase corresponding to a general formula represented by C6Ax′Fy′, with x′ varying from 0 to 1.5 and y′ varying from 0.5 to 3;
from 20 to 70% of a belite C2S phase;
less than 10% of a C11S4B phase; and
more than 0.3% of P2O5,
wherein:
C represents CaO;
A represents Al2O3;
F represents Fe2O3;
S represents SiO2; and
$ represents SO3.

### Claim 2 (depends on 1)

The clinker according to claim 1, wherein the phase composition contains from 10 to 50% of the iron-doped calcium sulfo-aluminate phase C4AxFy$z.

### Claim 3 (depends on 1)

The clinker according to claim 1, wherein x varies from 2.1 to 2.9.

### Claim 4 (depends on 1)

The clinker according to claim 1, wherein the phase composition contains from 0 to 20% of the calcium aluminoferrite phase C6Ax′Fy′.

### Claim 5 (depends on 1)

The clinker according to claim 1, wherein x′ varies from 0.65 to 1.3 and/or y′ varies from 1.5 to 2.5.

### Claim 6 (depends on 1)

The clinker according to claim 1, wherein the phase composition contains from 30% to 55% of the belite C2S phase.

### Claim 7 (depends on 1)

The clinker according to claim 1, wherein the phase composition contains less than 5% of the C11S4B phase.

### Claim 8 (depends on 1)

The clinker according to claim 1, wherein the phase composition contains more than 0.5% P2O5.

### Claim 9 (depends on 1)

The clinker according to claim 1, wherein the phase composition contains less than 3% free lime CaO.

### Claim 10 (depends on 1)

The clinker according to claim 1, wherein the phase composition contains less than 5% C$.

### Claim 11 (depends on 1)

The clinker according to claim 1, wherein the phase composition contains less than 10% C2AS.

### Claim 12 (depends on 1)

A method for preparing the clinker according to claim 1 comprising the following steps:
1) preparing a raw mix of raw materials comprising:
from 0.1 to 40% bauxite, marlstones, red muds and/or any other sedimentary, metamorphic or magmatic rocks or industrial mineral derivatives with a high aluminum content;
from 0.1 to 12% gypsum, borogypsum, phosphogypsum, desulphogypsum, anhydrite and/or hemihydrate;
from 0.1 to 65% limestone and/or phosphatic limestone, and/or any other sedimentary, metamorphic or magmatic rocks or industrial mineral derivatives with a high calcium content;
from 0.1 to 20% apatite, hydroxyapatite, and/or any phosphate ore, or calcium phosphate or natural or synthetic, mineral or organic, phosphates;
from 0 to 12% quartz, silica, expanded silica, silica fumes or any other sedimentary, metamorphic or magmatic rocks or industrial mineral derivatives with a high silicon content; and
from 0 to 12% iron oxide and/or iron sulfate and/or iron sulfides and/or any other natural or synthetic iron-rich and/or sulfur-rich mineral materials;
2) mixing (optionally, by co-grinding) the raw materials, and
3) baking the mixture of raw materials at a temperature T2 ranging from 1150° C. to 1300° C. according to the following steps:
a) heating the mixture from ambient temperature to a temperature ranging from 800° C. to 1200° C., over a time period t1 ranging from 20 to 500 minutes,
b) raising the temperature to the temperature T2, over a time period t2 ranging from 15 to 60 minutes,
c) maintaining the temperature at T2, over a time period t3 ranging from 0 to 80 minutes,
d) decreasing the temperature from T2 to a temperature T3, T3 being higher than or equal to 1100° C., over a time period t4 ranging from 0 to 15 minutes, and
e) tempering the clinker and cooling it rapidly to ambient temperature, over a time period t5 ranging from 5 to 60 minutes.

### Claim 13 (depends on 1)

A hydraulic binder comprising the clinker according to claim 1.

### Claim 14 (depends on 13)

Grout comprising the hydraulic binder according to claim 13.

### Claim 15 (depends on 13)

Concrete comprising the hydraulic binder according to claim 13.

### Claim 16 (depends on 13)

Mortar comprising the hydraulic binder according to claim 13.