WO2000024690A1 - Improved cement composition - Google Patents
Improved cement composition Download PDFInfo
- Publication number
- WO2000024690A1 WO2000024690A1 PCT/BE1999/000130 BE9900130W WO0024690A1 WO 2000024690 A1 WO2000024690 A1 WO 2000024690A1 BE 9900130 W BE9900130 W BE 9900130W WO 0024690 A1 WO0024690 A1 WO 0024690A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- acid
- wouastonite
- cement composition
- composition according
- phosphate cement
- Prior art date
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- 239000000203 mixture Substances 0.000 title claims abstract description 55
- 239000004568 cement Substances 0.000 title claims abstract description 29
- 239000002253 acid Substances 0.000 claims abstract description 43
- 229910019142 PO4 Inorganic materials 0.000 claims abstract description 16
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims abstract description 16
- 239000010452 phosphate Substances 0.000 claims abstract description 16
- 229910001463 metal phosphate Inorganic materials 0.000 claims abstract description 7
- 150000001875 compounds Chemical class 0.000 claims abstract description 6
- 239000007864 aqueous solution Substances 0.000 claims abstract description 5
- 239000010456 wollastonite Substances 0.000 claims abstract description 3
- 229910052882 wollastonite Inorganic materials 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 20
- 235000021317 phosphate Nutrition 0.000 claims description 14
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 10
- 239000004327 boric acid Substances 0.000 claims description 10
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical class OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 9
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical group OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 8
- 239000001117 sulphuric acid Substances 0.000 claims description 8
- 235000011149 sulphuric acid Nutrition 0.000 claims description 8
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 6
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 claims description 5
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 5
- 150000004677 hydrates Chemical class 0.000 claims description 4
- 150000007522 mineralic acids Chemical class 0.000 claims description 4
- -1 alkaline-earth metal salts Chemical class 0.000 claims description 3
- ILRRQNADMUWWFW-UHFFFAOYSA-K aluminium phosphate Chemical class O1[Al]2OP1(=O)O2 ILRRQNADMUWWFW-UHFFFAOYSA-K 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 229910052783 alkali metal Inorganic materials 0.000 claims description 2
- 150000001340 alkali metals Chemical class 0.000 claims description 2
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims description 2
- 150000003863 ammonium salts Chemical class 0.000 claims description 2
- 229910021538 borax Inorganic materials 0.000 claims description 2
- 239000001506 calcium phosphate Substances 0.000 claims description 2
- 235000011010 calcium phosphates Nutrition 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- WBJZTOZJJYAKHQ-UHFFFAOYSA-K iron(3+) phosphate Chemical class [Fe+3].[O-]P([O-])([O-])=O WBJZTOZJJYAKHQ-UHFFFAOYSA-K 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- GVALZJMUIHGIMD-UHFFFAOYSA-H magnesium phosphate Chemical class [Mg+2].[Mg+2].[Mg+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O GVALZJMUIHGIMD-UHFFFAOYSA-H 0.000 claims description 2
- 239000004137 magnesium phosphate Substances 0.000 claims description 2
- 235000010994 magnesium phosphates Nutrition 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- 235000010339 sodium tetraborate Nutrition 0.000 claims description 2
- WYXIGTJNYDDFFH-UHFFFAOYSA-Q triazanium;borate Chemical compound [NH4+].[NH4+].[NH4+].[O-]B([O-])[O-] WYXIGTJNYDDFFH-UHFFFAOYSA-Q 0.000 claims description 2
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical class [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 claims description 2
- VLCLHFYFMCKBRP-UHFFFAOYSA-N tricalcium;diborate Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]B([O-])[O-].[O-]B([O-])[O-] VLCLHFYFMCKBRP-UHFFFAOYSA-N 0.000 claims description 2
- BSVBQGMMJUBVOD-UHFFFAOYSA-N trisodium borate Chemical compound [Na+].[Na+].[Na+].[O-]B([O-])[O-] BSVBQGMMJUBVOD-UHFFFAOYSA-N 0.000 claims description 2
- LRXTYHSAJDENHV-UHFFFAOYSA-H zinc phosphate Chemical class [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LRXTYHSAJDENHV-UHFFFAOYSA-H 0.000 claims description 2
- LEHFSLREWWMLPU-UHFFFAOYSA-B zirconium(4+);tetraphosphate Chemical class [Zr+4].[Zr+4].[Zr+4].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LEHFSLREWWMLPU-UHFFFAOYSA-B 0.000 claims description 2
- 125000005619 boric acid group Chemical group 0.000 claims 1
- 230000009257 reactivity Effects 0.000 description 6
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000006260 foam Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000741 silica gel Substances 0.000 description 3
- 229910002027 silica gel Inorganic materials 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000001175 calcium sulphate Substances 0.000 description 2
- 235000011132 calcium sulphate Nutrition 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229940001007 aluminium phosphate Drugs 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 159000000007 calcium salts Chemical class 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000001139 pH measurement Methods 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/34—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing cold phosphate binders
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/04—Silica-rich materials; Silicates
- C04B14/043—Alkaline-earth metal silicates, e.g. wollastonite
Definitions
- the present invention concerns the field of cement, and relates particularly to phosphate cements.
- the aim of the treatment is to have a good opacity properties and low abrasiveness resistance, so that the final product, i.e., acid treated woUastonite, can be used as a pigment for paper industry (column 1, line 41-53).
- the treated woUastonite called surface-pacified woUastonite in US2, may be used as an inert filler, or in the composition of US3.
- the aim of treating the woUastonite by the acid is to have a "reaction uniformity" of the woUastonite (column 1, line 19-27), so that the reaction, presumably the quick-setting process of the US3, will not be influenced by the different batches and grades of raw material.
- Example 4 of US2 shows a setting time of 1 hour, which is considered as quick-setting in an industrial process.
- Example 2 of US2 was tested to examine its setting process, and the result shows that it has a setting time of less than 10 minutes at 20°C (Table 3).
- Wl our previous invention, discloses a composition comprising an acid metal phosphate solution, a woUastonite compound and an oxy-boron compound as setting retarder.
- This composition discloses a technique to reduce reactivity of the composition by the setting retarder which results in a long pot life.
- the Wl composition may provide a long pot life. However, its setting will take long time as well at 20 °C because the reactivity of the composition is significantly reduced by the retarder. High temperature curing may be used to accelerate the setting, but there are times when high temperatures are not suitable.
- the Invention disclosed herein relates to a phosphate cement composition, its method of preparation and resulting products formed therefrom.
- Some particular objectives of the Invention are: (1) to reduce pH value of the woUastonite by a treatment so that reactivity of the said component A can be fundamentally reduced, resulting in further extended pot life; and (2) to provide a technique so that setting of the composition become obtainable whenever it is required.
- a phosphate cement composition which comprises, in combination, a component A and a component B wherein the component A comprises an acid-treated woUastonite compound, an acid aqueous solution of metal phosphate, and a setting retarder; and component B comprises a setting accelerator.
- the metal phosphate is selected from the group consisting of: aluminium phosphates, zirconium phosphates, magnesium phosphates, zinc phosphates, calcium phosphates, iron phosphates, including derivatives and mixtures thereof.
- the setting retarder may be selected from the group consisting of boric acid, alkali metal and, alkaline-earth metal salts of boric acid, amine and ammonium salts of boric acid, including hydrates and mixtures thereof.
- the setting retarder may be selected from the group consisting of: boric acid, sodium borate, ammonium borate, calcium borate, including hydrates and mixtures thereof.
- Preferably said setting retarder is added as a powder or a liquid.
- Suitable accelerators are be known in the art; one is MgO.
- the woUastonite of the said acid-treated woUastonite compound may be a natural or synthetic woUastonite, in calcined or non-calcined state, or a combination thereof.
- the acid-treated woUastonite has preferably has a pH value of 6-8 a measured using a woUastonite 10 % water slurry.
- the said acid used to treat the woUastonite may be an inorganic acid.
- the acid used to treat the woUastonite may be sulphuric acid, phosphoric acid, carbonate acid, acetate acid, or a combination thereof.
- the said acid may be sulphuric acid, phosphoric acid, carbonate acid, acetate acid, boric acid, or a combination thereof.
- the said acid preferably has a normality of O.03 - 0.05.
- composition A forming the composition into a shape
- composition C adding composition C to set the cement in the shape
- the component A has a sufficiently long pot life, while the component B can be added to component at any moment during the pot life to form the cement which sets in relative short period so that a shaped body can be fully cured and produced at circa 20 °C by the Invention.
- controlling the setting time is realised using a setting accelerator.
- this setting accelerator is added to the Invention composition A at any moment during the pot life, a setting mechanism is induced immediately which causes setting and full curing of the Invention composition at ambient temperature condition in a relatively short period.
- the Invention is fundamentally different frown the Wl (Table 1) in the particular woUastonite employed and presence of the setting accelerator. This significantly improves industrial applicability of the technology.
- the composition of the Invention is evidently different not only in the presence of setting retarder and a setting accelerator, but also in the particular woUastonite employed.
- the presence of silica gel indicates that woUastonite structure is attacked during the treatment.
- the Invention has novelty, inventive step and industrial applicability with regard to its composition, method of treating the woUastonite and the resulting products formed from the cement.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Civil Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention concerns the field of cement, and relates particularly to phosphate cements. According to one aspect of the present invention there is provided a phosphate cement composition which comprises, in combination, a component A and a component B wherein the component A comprises an acid-treated wollastonite compound, an acid aqueous solution of metal phosphate, and a setting retarder; and component B comprises a setting accelerator.
Description
IMPROVED CEMENT COMPOSITION
The present invention concerns the field of cement, and relates particularly to phosphate cements.
Following abbreviations will be used throughout the text:
US1 = US Patent 3,642,511
US2 = US Patent 4,956,321 US3 = US Patent 4,375,516
Wl = WO 97/19033
Invention = newly developed inventio .
Background information
US1 discloses a method to treat woUastonite by acid, say sulphuric acid and phosphoric acid, to a degree of pH <= 4.0. The aim of the treatment is to have a good opacity properties and low abrasiveness resistance, so that the final product, i.e., acid treated woUastonite, can be used as a pigment for paper industry (column 1, line 41-53).
US2 discloses a method to treat woUastonite by acid, say sulphuric acid, carbonate acid and acetate acid, to a degree that the treated woUastonite has a pH=9-10. The
treated woUastonite, called surface-pacified woUastonite in US2, may be used as an inert filler, or in the composition of US3. The aim of treating the woUastonite by the acid is to have a "reaction uniformity" of the woUastonite (column 1, line 19-27), so that the reaction, presumably the quick-setting process of the US3, will not be influenced by the different batches and grades of raw material. As a result, the treated woUastonite has a pH=9-10, which is not fundamentally different from that of the untreated woUastonite of pH=9-10.7 (column 2, line 34-39). This is an indication that US2 seeks to keep the reactivity of the US3 composition. As an evidence, Example 4 of US2 shows a setting time of 1 hour, which is considered as quick-setting in an industrial process. We have tested the Example 2 of US2 to examine its setting process, and the result shows that it has a setting time of less than 10 minutes at 20°C (Table 3).
Wl, our previous invention, discloses a composition comprising an acid metal phosphate solution, a woUastonite compound and an oxy-boron compound as setting retarder. This composition discloses a technique to reduce reactivity of the composition by the setting retarder which results in a long pot life. The woUastonite used in the Wl is an untreated woUastonite
having a pH = 9-12. The Wl composition may provide a long pot life. However, its setting will take long time as well at 20 °C because the reactivity of the composition is significantly reduced by the retarder. High temperature curing may be used to accelerate the setting, but there are times when high temperatures are not suitable.
There is a pressing need to develop a technique to accelerate setting reaction of a composition according to Wl, using means other than increased curing temperature, so that a shaped body can be fully cured and obtained in a relatively short period.
It is an object of the present invention to provide a composition which fulfils the above need.
Description of the Invention
The Invention disclosed herein relates to a phosphate cement composition, its method of preparation and resulting products formed therefrom.
Some particular objectives of the Invention are: (1) to reduce pH value of the woUastonite by a treatment so that reactivity of the said component A can be
fundamentally reduced, resulting in further extended pot life; and (2) to provide a technique so that setting of the composition become obtainable whenever it is required.
According to one aspect of the present invention there is provided a phosphate cement composition which comprises, in combination, a component A and a component B wherein the component A comprises an acid-treated woUastonite compound, an acid aqueous solution of metal phosphate, and a setting retarder; and component B comprises a setting accelerator.
Preferably the metal phosphate is selected from the group consisting of: aluminium phosphates, zirconium phosphates, magnesium phosphates, zinc phosphates, calcium phosphates, iron phosphates, including derivatives and mixtures thereof.
The setting retarder may be selected from the group consisting of boric acid, alkali metal and, alkaline-earth metal salts of boric acid, amine and ammonium salts of boric acid, including hydrates and mixtures thereof.
The setting retarder may be selected from the group
consisting of: boric acid, sodium borate, ammonium borate, calcium borate, including hydrates and mixtures thereof. Preferably said setting retarder is added as a powder or a liquid. Suitable accelerators are be known in the art; one is MgO.
The woUastonite of the said acid-treated woUastonite compound may be a natural or synthetic woUastonite, in calcined or non-calcined state, or a combination thereof.
The acid-treated woUastonite has preferably has a pH value of 6-8 a measured using a woUastonite 10 % water slurry.
The said acid used to treat the woUastonite may be an inorganic acid. For example, the acid used to treat the woUastonite may be sulphuric acid, phosphoric acid, carbonate acid, acetate acid, or a combination thereof.
According of another aspect of the invention there is provided a method of producing acid-treated woUastonite for a cement composition comprising: (1) mixing woUastonite with an inorganic acid aqueous solution in a concentration and quantity sufficient to form an acid/wollastonite mixture having a pH=6-8; and (2) drying
the mixture after its pH value becomes stable.
The said acid may be sulphuric acid, phosphoric acid, carbonate acid, acetate acid, boric acid, or a combination thereof. The said acid preferably has a normality of O.03 - 0.05.
According to yet another aspect of the invention there is provided a shaped product formed from cement as hereinbefore described.
According to yet a further aspect of the invention there is provided a shaped product containing the acid treated woUastonite as hereinbefore described.
According to yet another aspect of the invention there is provided a method of making a solid shaped article comprising: providing composition A, forming the composition into a shape, and adding composition C to set the cement in the shape.
In general, the component A has a sufficiently long pot life, while the component B can be added to component at any moment during the pot life to form the cement which sets in relative short period so that a shaped body can be fully cured and produced at circa 20 °C by the
Invention.
In general, reducing reactivity of the composition A of the Invention is achieved by treating the woUastonite with acid, to a degree that the treated woUastonite has a pH = 6-8 in woUastonite 10 % water slurry (this method of pH measurement will be used hereafter). When this treated woUastonite of pH = 6-8 meets acid metal phosphate solution, it reacts much slower than that of untreated woUastonite having a pH = 9-12. This results in a more extended pot life for the component A, even compared to that of Wl.
On the other hand, controlling the setting time is realised using a setting accelerator. When this setting accelerator is added to the Invention composition A at any moment during the pot life, a setting mechanism is induced immediately which causes setting and full curing of the Invention composition at ambient temperature condition in a relatively short period.
These techniques have never been developed prior to this Invention, specially for the accelerator. This is because the phosphate cement using woUastonite as primary material has always been known as a quick-setting cement (with the exception of that disclosed in Wl) so no
setting accelerator has ever been considered necessary.
Following is a description of some comparative tests illustrating the effectiveness of the compositions of the present invention.
Composition
With respect to composition, the Invention is fundamentally different frown the Wl (Table 1) in the particular woUastonite employed and presence of the setting accelerator. This significantly improves industrial applicability of the technology.
Compared to US2, the composition of the Invention is evidently different not only in the presence of setting retarder and a setting accelerator, but also in the particular woUastonite employed. The Invention woUastonite is a mixture of a calcium salt of the particular acid used in the treatment (calcium sulphate, for instance), a silica gel and an un-reacted woUastonite, characterised by pH = 6-8. The presence of silica gel indicates that woUastonite structure is attacked during the treatment. While the US2 woUastonite is only surface-pacified with a surface-displaceable anion without altering crystal structure, and having a
pH = 9-10 (column 3, line 30-38). These therefore are two different materials, to be used for different applications.
Table 1 Composition difference
Setting process
Because of the difference in material composition, setting process of the Invention, US2 and Wl are consequently different, as summarised in the Table 2.
Table 2 Difference in the setting process
*Controllable quick setting in the sense that the setting can be realised by adding setting accelerator.
Comparative tests
Comparative tests has been made, using compositions of the Invention, Wl and US2 to verify their setting process (Table 3). The woUastonite used in the test is very reactive and has a pH=12. The surface-pacified woUastonite used for US2 is obtained by treating it with sulphuric acid having a normality of 0.01, rinsed with de-ionised water and then dried, as required by the Example 2, US2 (column 3, Example 2). The acid treated woUastonite used in the Invention is a mixture comprising calcium sulphate, silica gel and un-reacted woUastonite obtained by treating it with sulphuric acid
having a normality of 0.04 and then dried at 60°C.
Table 3 Pot life at 20°C
(1) phosphate to woUastonite ratio (2) maximum pot life, no setting accelerator is used
(3) aluminium phosphate from US2 Example 2, columns 3-4.
The test results show that when the US2 composition is used, it is always quick-setting together with foaming, independent of the pH value of the woUastonite. It demonstrates that the surface-pacified woUastonite cannot provide long pot life. On the other hand, when the
Invention composition is employed, the woUastonite of pH = 7 does reduce reactivity of the component A compared to Wl and the US2, indicated by the dramatic increase of pot life.
Field of Application
The field of application and industrial applicability is summarised in the table 4 .
Table 4 properties and field of application
Field of application Industrial suitability
Invention 1. fibre reinforced much improved over composites l
3. cement
4. adhesive
5. foams
Wl 1. fibre reinforced Yes composites
3. cement
4. adhesive
5. foams
US2 1. foams difficult
2. quick-setting applications
In view of the difference in composition, setting process and industrial applicability, the Invention has novelty, inventive step and industrial applicability with regard to its composition, method of treating the woUastonite and the resulting products formed from the cement.
Claims
1. A phosphate cement composition which comprises, in combination, a component A and a component B wherein the component A comprises an acid-treated woUastonite compound, an acid aqueous solution of metal phosphate, and a setting retarder; and component B comprises a setting accelerator.
2. A phosphate cement composition according to claim 1 wherein the metal phosphate is selected from the group consisting of: aluminium phosphates, zirconium phosphates, magnesium phosphates, zinc phosphates, calcium phosphates, iron phosphates, including derivatives and mixtures thereof.
3. A phosphate cement composition according to claim 1 or claim 2 wherein said setting retarder is selected from the group consisting of boric acid, alkali metal and, alkaline-earth metal salts of boric acid, a ine and ammonium salts of boric acid, including hydrates and mixtures thereof .
4. A phosphate cement composition according to claim 3 wherein the setting retarder is selected from the group consisting of: boric acid, sodium borate, ammonium borate, calcium borate, including hydrates and mixtures thereof .
5. A phosphate cement composition according to claim 3 or claim 4 wherein said setting retarder is added as a powder or a liquid.
6. A phosphate cement composition according to claim 1 wherein the woUastonite of the said acid-treated woUastonite compound is a natural or synthetic woUastonite, in calcined or non-calcined state, or a combination thereof .
7. A phosphate cement composition according to claim 1 and claim 6 wherein said acid-treated woUastonite has a pH value of 6-8 a measured using a woUastonite 10 % water slurry.
8. A phosphate cement composition according to claim 1 and claims 6 or 7 wherein the said acid used to treat the woUastonite is an inorganic acid.
9. A phosphate cement composition according to claim 1 and any of claims 6 to 8 wherein the acid used to treat the woUastonite is sulphuric acid, phosphoric acid, carbonate acid, acetate acid, or a combination thereof.
10. A method of producing acid-treated woUastonite for a cement composition comprising: (1) mixing woUastonite with an inorganic acid aqueous solution in a concentration and quantity sufficient to form an acid/wollastonite mixture having a pH=6-8; and (2) drying the mixture after its pH value becomes stable.
11. A method according to claim 10 wherein the said acid is sulphuric acid, phosphoric acid, carbonate acid, acetate acid, boric acid, or a combination thereof.
12. A method according to claim 10 or 11 wherein the said acid has a normality of O.03 - 0.05.
13. A shaped product formed from cement according to any of claims 1-10.
14. A shaped product containing the acid treated woUastonite of claim 11 or 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU10203/00A AU1020300A (en) | 1998-10-23 | 1999-10-22 | Improved cement composition |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9823285.3 | 1998-10-23 | ||
| GBGB9823285.3A GB9823285D0 (en) | 1998-10-23 | 1998-10-23 | Improved cement composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2000024690A1 true WO2000024690A1 (en) | 2000-05-04 |
Family
ID=10841208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/BE1999/000130 WO2000024690A1 (en) | 1998-10-23 | 1999-10-22 | Improved cement composition |
Country Status (3)
| Country | Link |
|---|---|
| AU (1) | AU1020300A (en) |
| GB (1) | GB9823285D0 (en) |
| WO (1) | WO2000024690A1 (en) |
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6518212B1 (en) | 2000-09-18 | 2003-02-11 | The University Of Chicago | Chemically bonded phospho-silicate ceramics |
| US7491267B2 (en) | 2001-08-10 | 2009-02-17 | Ceratech, Inc. | Composite materials and methods of making and using such composite materials |
| US7517402B2 (en) | 2001-10-08 | 2009-04-14 | Xexos Ltd. | Composition comprising a phosphate binder and its preparation |
| US7798287B1 (en) | 2005-01-20 | 2010-09-21 | Serious Materials, Inc. | Acoustical ceiling panels |
| US7909136B2 (en) | 2004-11-24 | 2011-03-22 | Serious Materials, Inc. | Soundproof assembly |
| US7908818B2 (en) | 2008-05-08 | 2011-03-22 | Serious Materials, Inc. | Methods of manufacturing acoustical sound proofing materials with optimized fracture characteristics |
| US7921965B1 (en) | 2004-10-27 | 2011-04-12 | Serious Materials, Inc. | Soundproof assembly and methods for manufacturing same |
| WO2012064194A1 (en) | 2010-11-11 | 2012-05-18 | Delft University Of Technology | Hot gas handling device and motorized vehicle comprising the device |
| US8181738B2 (en) | 2007-04-24 | 2012-05-22 | Serious Energy, Inc. | Acoustical sound proofing material with improved damping at select frequencies and methods for manufacturing same |
| US8424251B2 (en) | 2007-04-12 | 2013-04-23 | Serious Energy, Inc. | Sound Proofing material with improved damping and structural integrity |
| US8916277B2 (en) | 2007-11-16 | 2014-12-23 | Serious Energy, Inc. | Low embodied energy wallboards and methods of making same |
| US9388568B2 (en) | 2007-04-06 | 2016-07-12 | Pacific Coast Building Products, Inc. | Acoustical sound proofing material with improved fracture characteristics and methods for manufacturing same |
| US9387649B2 (en) | 2007-06-28 | 2016-07-12 | Pacific Coast Building Products, Inc. | Methods of manufacturing acoustical sound proofing materials with optimized fracture characteristics |
| CN106927781A (en) * | 2017-04-28 | 2017-07-07 | 重庆大学 | One kind is with CO2Phosphate cement foam concrete for foamed gas and preparation method thereof |
| CN107903002A (en) * | 2017-11-21 | 2018-04-13 | 常州可赛成功塑胶材料有限公司 | A kind of preparation method of high-early-strength phosphorus slag based cementitious material |
| US10174499B1 (en) | 2007-05-01 | 2019-01-08 | Pacific Coast Building Products, Inc. | Acoustical sound proofing material for architectural retrofit applications and methods for manufacturing same |
| US11124965B2 (en) | 2017-09-26 | 2021-09-21 | Certainteed Gypsum, Inc. | Plaster boards having internal layers and methods for making them |
| US11203864B2 (en) | 2017-09-28 | 2021-12-21 | Certainteed Gypsum, Inc. | Plaster boards and methods for making them |
| US11214962B2 (en) | 2017-09-30 | 2022-01-04 | Certainteed Gypsum, Inc. | Tapered plasterboards and methods for making them |
| US11753817B2 (en) | 2016-12-15 | 2023-09-12 | Certainteed Gypsum, Inc. | Plaster boards and methods for making them |
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| US4504555A (en) * | 1982-09-07 | 1985-03-12 | Masonite Corporation | Composition and process for forming inorganic resins and resulting product |
| US4956321A (en) * | 1988-06-16 | 1990-09-11 | Armstrong World Industries, Inc. | Surface pacified wollastonite |
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Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6518212B1 (en) | 2000-09-18 | 2003-02-11 | The University Of Chicago | Chemically bonded phospho-silicate ceramics |
| US7491267B2 (en) | 2001-08-10 | 2009-02-17 | Ceratech, Inc. | Composite materials and methods of making and using such composite materials |
| US7517402B2 (en) | 2001-10-08 | 2009-04-14 | Xexos Ltd. | Composition comprising a phosphate binder and its preparation |
| US7736429B2 (en) | 2001-10-08 | 2010-06-15 | Xexos Ltd. | Composition comprising a phosphate binder and its preparation |
| US7921965B1 (en) | 2004-10-27 | 2011-04-12 | Serious Materials, Inc. | Soundproof assembly and methods for manufacturing same |
| US7909136B2 (en) | 2004-11-24 | 2011-03-22 | Serious Materials, Inc. | Soundproof assembly |
| US7798287B1 (en) | 2005-01-20 | 2010-09-21 | Serious Materials, Inc. | Acoustical ceiling panels |
| US9388568B2 (en) | 2007-04-06 | 2016-07-12 | Pacific Coast Building Products, Inc. | Acoustical sound proofing material with improved fracture characteristics and methods for manufacturing same |
| US10132076B2 (en) | 2007-04-06 | 2018-11-20 | Pacific Coast Building Products, Inc. | Acoustical sound proofing material with improved fracture characteristics and methods for manufacturing same |
| US10125492B2 (en) | 2007-04-06 | 2018-11-13 | Pacific Coast Building Products, Inc. | Acoustical sound proofing material with improved fracture characteristics and methods for manufacturing same |
| US8424251B2 (en) | 2007-04-12 | 2013-04-23 | Serious Energy, Inc. | Sound Proofing material with improved damping and structural integrity |
| US8181738B2 (en) | 2007-04-24 | 2012-05-22 | Serious Energy, Inc. | Acoustical sound proofing material with improved damping at select frequencies and methods for manufacturing same |
| US10174499B1 (en) | 2007-05-01 | 2019-01-08 | Pacific Coast Building Products, Inc. | Acoustical sound proofing material for architectural retrofit applications and methods for manufacturing same |
| US9387649B2 (en) | 2007-06-28 | 2016-07-12 | Pacific Coast Building Products, Inc. | Methods of manufacturing acoustical sound proofing materials with optimized fracture characteristics |
| US8916277B2 (en) | 2007-11-16 | 2014-12-23 | Serious Energy, Inc. | Low embodied energy wallboards and methods of making same |
| US7908818B2 (en) | 2008-05-08 | 2011-03-22 | Serious Materials, Inc. | Methods of manufacturing acoustical sound proofing materials with optimized fracture characteristics |
| WO2012064194A1 (en) | 2010-11-11 | 2012-05-18 | Delft University Of Technology | Hot gas handling device and motorized vehicle comprising the device |
| US11753817B2 (en) | 2016-12-15 | 2023-09-12 | Certainteed Gypsum, Inc. | Plaster boards and methods for making them |
| CN106927781A (en) * | 2017-04-28 | 2017-07-07 | 重庆大学 | One kind is with CO2Phosphate cement foam concrete for foamed gas and preparation method thereof |
| US11124965B2 (en) | 2017-09-26 | 2021-09-21 | Certainteed Gypsum, Inc. | Plaster boards having internal layers and methods for making them |
| US11655635B2 (en) | 2017-09-26 | 2023-05-23 | Certainteed Gypsum, Inc. | Plaster boards having internal layers and methods for making them |
| US11203864B2 (en) | 2017-09-28 | 2021-12-21 | Certainteed Gypsum, Inc. | Plaster boards and methods for making them |
| US11214962B2 (en) | 2017-09-30 | 2022-01-04 | Certainteed Gypsum, Inc. | Tapered plasterboards and methods for making them |
| US11976465B2 (en) | 2017-09-30 | 2024-05-07 | Certainteed Gypsum, Inc. | Tapered plasterboards and methods for making them |
| CN107903002A (en) * | 2017-11-21 | 2018-04-13 | 常州可赛成功塑胶材料有限公司 | A kind of preparation method of high-early-strength phosphorus slag based cementitious material |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9823285D0 (en) | 1998-12-23 |
| AU1020300A (en) | 2000-05-15 |
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