CN113264697A - Marine engineering portland cement and preparation method thereof - Google Patents
Marine engineering portland cement and preparation method thereof Download PDFInfo
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- CN113264697A CN113264697A CN202110497548.1A CN202110497548A CN113264697A CN 113264697 A CN113264697 A CN 113264697A CN 202110497548 A CN202110497548 A CN 202110497548A CN 113264697 A CN113264697 A CN 113264697A
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- Prior art keywords
- portland cement
- powder
- strength
- marine
- resistance
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- 239000011398 Portland cement Substances 0.000 title claims abstract description 32
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 239000000843 powder Substances 0.000 claims abstract description 45
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 16
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000004115 Sodium Silicate Substances 0.000 claims abstract description 14
- 229910052911 sodium silicate Inorganic materials 0.000 claims abstract description 14
- 239000010881 fly ash Substances 0.000 claims abstract description 12
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims abstract description 11
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229940095564 anhydrous calcium sulfate Drugs 0.000 claims abstract description 9
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 8
- 239000010440 gypsum Substances 0.000 claims abstract description 8
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 8
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 8
- 238000000227 grinding Methods 0.000 claims description 10
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 238000005260 corrosion Methods 0.000 abstract description 7
- 230000007797 corrosion Effects 0.000 abstract description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 abstract description 6
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 abstract description 5
- 230000006835 compression Effects 0.000 abstract description 5
- 238000007906 compression Methods 0.000 abstract description 5
- 238000005336 cracking Methods 0.000 abstract description 4
- 230000036571 hydration Effects 0.000 abstract description 4
- 238000006703 hydration reaction Methods 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 4
- 239000003973 paint Substances 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 238000009991 scouring Methods 0.000 abstract description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 3
- 239000011707 mineral Substances 0.000 abstract description 3
- 239000004568 cement Substances 0.000 description 12
- 239000000243 solution Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000011083 cement mortar Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000010220 ion permeability Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000003469 silicate cement Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012360 testing method Methods 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
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
- C04B7/26—Cements from oil shales, residues or waste other than slag from raw materials containing flue dust, i.e. fly ash
-
- 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
- C04B7/00—Hydraulic cements
- C04B7/02—Portland cement
- C04B7/04—Portland cement using raw materials containing gypsum, i.e. processes of the Mueller-Kuehne type
-
- 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
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Abstract
The invention provides marine portland cement and a preparation method thereof, wherein the marine portland cement comprises the following components in percentage by mass: 30-40% of silicon dioxide, 30-40% of mineral powder, 8-12% of gypsum, 8-15% of metakaolin, 5-10% of fly ash, 1-4% of alumina micropowder, 5-8% of sodium silicate powder and 0.5-2% of anhydrous calcium sulfate powder. The indexes of the invention far exceed the national standard, the 2-hour compressive strength can reach 47.8Mpa, especially the 24-hour compressive strength reaches the 28-day strength of the national standard, and the performance advantage is very obvious; the weather resistance is strong, the chloride ion permeation resistance and the sulfate corrosion resistance are realized, the weight is high, the strength is high, the service life of the facility can be prolonged by 2-5 times, and the maintenance cost is greatly saved; the paint has the advantages of scouring resistance, good durability and difficult secondary cracking; low hydration heat, small temperature change and difficult generation of cracks; the concrete has the advantages of early strength, quick hardening, good bonding performance with a base and good compression resistance; wide application and low cost.
Description
Technical Field
The invention belongs to the technical field of cement, and particularly relates to marine Portland cement and a preparation method thereof.
Background
For modern marine concrete engineering, the engineering structure has a life which is far short of the design life, and the marine concrete structure is required to be strictly protected from corrosion and effectively repaired and reinforced. At present, the application of special cement for maritime workers is not wide in China, most of the existing maritime workers in China adopt the traditional concrete and additive mode, the special cement is mainly applied to the construction of coastal and cross-sea bridges, submarine tunnels, ports and docks, artificial islands and the like, and a small amount of exploratory research is carried out on floating concrete offshore platforms and development. In recent years, great progress is made in applying admixtures such as fly ash and slag powder to coastal key projects, but the research and application technology of new materials in the field of marine concrete is generally behind that in foreign developed countries, and a preparation technology of high-strength high-performance lightweight concrete is not obtained at home.
At present, the ocean engineering in China has serious problems after about 10 years of construction. Mainly affected by the long-term effects of sea wave impact abrasion, ice slush impact, freeze-thaw damage, alternation of dryness and wetness, salt and chloride ion permeation erosion and the like, and the following problems mainly exist: corrosion of the steel bars and expansion and cracking along the steel bars; the concrete is easy to crack and fall off; the concrete is corroded and peeled off.
Disclosure of Invention
In order to solve the technical problems, the embodiment of the invention provides the marine portland cement and the preparation method thereof, each index far exceeds the national standard, the compressive strength in 2 hours can reach 47.8Mpa, especially the compressive strength in 24 hours can reach the strength of the national standard for 28 days, and the performance advantage is very obvious; the marine Portland cement has the advantages of strong weather resistance, chlorine ion permeation resistance, sulfate corrosion resistance, light weight and high strength, the service life of facilities can be prolonged by 2-5 times, and the maintenance cost is greatly saved; the paint also has the advantages of scouring resistance, good durability and difficult secondary cracking; low hydration heat, small temperature change and difficult generation of cracks; the concrete has the advantages of early strength, quick hardening, good bonding performance with a base and good compression resistance; wide application and low cost.
In order to achieve the above purpose, the embodiment of the present invention adopts the following technical solutions:
in a first aspect, an embodiment of the present invention provides marine portland cement, including the following components, by mass:
preferably, the specific surface area of the ore powder is 600-800 m2/kg。
Preferably, the fly ash grade is class I.
Preferably, the modulus of the sodium silicate powder is 1-2.
In a second aspect, an embodiment of the present invention further provides a method for preparing marine portland cement, where the method includes the following steps:
step S1, grinding the silicon dioxide and the gypsum together to obtain first grinding fine powder;
and step S2, adding metakaolin, fly ash, alumina micro powder, sodium silicate powder and anhydrous calcium sulfate powder into the first ground fine powder, and fully mixing and uniformly coating.
The invention has the following beneficial effects:
the metakaolin in the marine portland cement is a high-activity active mineral obtained by calcining the metakaolin at a proper temperature, and the metakaolin serving as an admixture of the cement can effectively increase the strength, particularly the early strength, enhance the sulfate corrosion resistance of the cement, reduce the chloride ion permeability of the concrete, inhibit the alkali-aggregate reaction of the cement, reduce the shrinkage of the cement and improve the pore structure of the cement. Sodium silicate, commonly known as sodium silicate, and the aqueous solution thereof, commonly known as water glass, are mineral binders, and the addition of sodium silicate can effectively improve the cohesiveness and the gelling property of cement mortar, so that the cement cohesiveness is good. The addition of alumina powder can reduce free calcium, raise the stability of cement and raise the early strength of cement. The addition of anhydrous calcium sulfate powder can raise the breaking strength and compression strength of cement.
The marine Portland cement has various indexes far exceeding the national standard, the compressive strength of 47.8Mpa in 2 hours, particularly the compressive strength of 28 days in 24 hours, and has very obvious performance advantages; the marine Portland cement has the advantages of strong weather resistance, chlorine ion permeation resistance, sulfate corrosion resistance, light weight and high strength, the service life of facilities can be prolonged by 2-5 times, and the maintenance cost is greatly saved; the paint also has the advantages of scouring resistance, good durability and difficult secondary cracking; low hydration heat, small temperature change and difficult generation of cracks; the concrete has the advantages of early strength, quick hardening, good bonding performance with a base and good compression resistance; wide application and low cost.
Detailed Description
In order that those skilled in the art will better understand the technical solutions of the present invention, the following detailed description of the present invention is provided in connection with specific embodiments.
The invention provides marine portland cement which comprises the following components in percentage by mass:
the specific surface area of the ore powder is 600-800 m2In terms of/kg. The grade of the fly ash is grade I. The modulus of the sodium silicate powder is 1-2.
The invention also provides a preparation method of the marine Portland cement, which is characterized by comprising the following steps:
step S1, grinding the silicon dioxide and the gypsum together to obtain first grinding fine powder;
and step S2, adding metakaolin, fly ash, alumina micro powder, sodium silicate powder and anhydrous calcium sulfate powder into the first ground fine powder, and fully mixing and uniformly coating.
Example 1:
the embodiment provides a marine portland cement, which comprises the following components in percentage by mass: 32% of silicon dioxide, 32% of ore powder, 9% of gypsum, 13% of metakaolin, 6% of fly ash, 1% of alumina micro powder, 6% of sodium silicate powder and 1% of anhydrous calcium sulfate powder.
The embodiment also provides a preparation method of the marine portland cement, which is characterized by comprising the following steps:
step S1, grinding the silicon dioxide and the gypsum together to obtain first grinding fine powder;
and step S2, adding metakaolin, fly ash, alumina micro powder, sodium silicate powder and anhydrous calcium sulfate powder into the first ground fine powder, and fully mixing and uniformly coating.
Example 2:
the embodiment provides a marine portland cement, which comprises the following components in percentage by mass: 32% of silicon dioxide, 33% of ore powder, 8% of gypsum, 12% of metakaolin, 6% of fly ash, 2% of alumina micro powder, 5.5% of sodium silicate powder and 1.5% of anhydrous calcium sulfate powder.
The embodiment also provides a preparation method of the marine portland cement, which is characterized by comprising the following steps:
step S1, grinding the silicon dioxide and the gypsum together to obtain first grinding fine powder;
and step S2, adding metakaolin, fly ash, alumina micro powder, sodium silicate powder and anhydrous calcium sulfate powder into the first ground fine powder, and fully mixing and uniformly coating.
The performance of the marine portland cements of examples 1 and 2 was tested according to the performance test items in GBT 31289-2014 (table 1). The detection result shows that the marine Portland cement of the embodiment 1 and the marine Portland cement of the embodiment 2 meet the standard requirements and have better performance.
Table 1 marine portland cement GBT 31289-2014, marine portland cement strength values (in mpa):
the strength of the marine Portland cement prepared in the examples 1 and 2 is tested according to the cement mortar strength test method GB/T17671-1999, and the test result is as follows: in the embodiment 1, the marine silicate cement has the compressive strength of 47.2MPa and the breaking strength of 7.1MPa within 2 hours; the 24-hour compressive strength is 52.1Mpa, and the flexural strength is 7.8 Mpa; example 2 marine Portland cement compressive strength 47.8Mpa, rupture strength 7.2 Mpa; the compressive strength reaches 52.5Mpa after 24 hours, and the breaking strength is 7.9.
According to the technical scheme, the marine Portland cement and the preparation method thereof are provided, various indexes far exceed the national standard, the 2-hour compressive strength can reach 47.8MPa, particularly the 24-hour compressive strength reaches the strength of the national standard for 28 days, and the performance advantage is very obvious; the marine Portland cement has the advantages of strong weather resistance, chlorine ion permeation resistance, sulfate corrosion resistance, light weight and high strength, the service life of facilities can be prolonged by 2-5 times, and the maintenance cost is greatly saved; the paint is resistant to scouring, good in durability and not easy to crack again; low hydration heat, small temperature change and difficult generation of cracks; the concrete has the advantages of early strength, quick hardening, good bonding performance with a base and good compression resistance; wide application and low cost.
The embodiments of the present invention have been described in detail through the embodiments, but the description is only exemplary of the embodiments of the present invention and should not be construed as limiting the scope of the embodiments of the present invention. The scope of protection of the embodiments of the invention is defined by the claims. In the present invention, the technical solutions described in the embodiments of the present invention or those skilled in the art, based on the teachings of the embodiments of the present invention, design similar technical solutions to achieve the above technical effects within the spirit and the protection scope of the embodiments of the present invention, or equivalent changes and modifications made to the application scope, etc., should still fall within the protection scope covered by the patent of the embodiments of the present invention.
Claims (5)
1. The marine Portland cement is characterized by comprising the following components in percentage by mass:
2. the marine Portland cement according to claim 1, wherein the specific surface area of the ore powder is 600-800 m2/kg。
3. The marine Portland cement of claim 1, wherein the fly ash grade is class I.
4. The marine portland cement of claim 1, wherein the sodium silicate powder has a modulus of 1 to 2.
5. A preparation method of marine Portland cement is characterized by comprising the following steps:
step S1, grinding the silicon dioxide and the gypsum together to obtain first grinding fine powder;
and step S2, adding metakaolin, fly ash, alumina micro powder, sodium silicate powder and anhydrous calcium sulfate powder into the first ground fine powder, and fully mixing and uniformly coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110497548.1A CN113264697A (en) | 2021-05-10 | 2021-05-10 | Marine engineering portland cement and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110497548.1A CN113264697A (en) | 2021-05-10 | 2021-05-10 | Marine engineering portland cement and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113264697A true CN113264697A (en) | 2021-08-17 |
Family
ID=77230356
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110497548.1A Pending CN113264697A (en) | 2021-05-10 | 2021-05-10 | Marine engineering portland cement and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113264697A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060000503A (en) * | 2004-06-29 | 2006-01-06 | 쌍용양회공업(주) | Chloride-shielding cement for marine concrete and its composition |
| CN104086104A (en) * | 2014-06-20 | 2014-10-08 | 深圳航天科技创新研究院 | Chemically bonded cementitious material, and preparation method and use method thereof |
| CN105693121A (en) * | 2016-03-02 | 2016-06-22 | 广西鱼峰水泥股份有限公司 | Maritime work Portland cement |
| CN109020270A (en) * | 2018-08-17 | 2018-12-18 | 华南理工大学 | A kind of high resistance to corrosion composite Portland cement and preparation method thereof |
| CN110143771A (en) * | 2019-03-27 | 2019-08-20 | 华润水泥技术研发有限公司 | High-performance marine portland cement compound additive and marine worker portland cement |
| CN110950554A (en) * | 2018-09-26 | 2020-04-03 | 中国建筑材料科学研究总院有限公司 | High-corrosion-resistance low-shrinkage portland cement for ocean engineering and preparation method thereof |
| CN110950566A (en) * | 2018-09-26 | 2020-04-03 | 中国建筑材料科学研究总院有限公司 | High-corrosion-resistance submicron composite material and application thereof |
-
2021
- 2021-05-10 CN CN202110497548.1A patent/CN113264697A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060000503A (en) * | 2004-06-29 | 2006-01-06 | 쌍용양회공업(주) | Chloride-shielding cement for marine concrete and its composition |
| CN104086104A (en) * | 2014-06-20 | 2014-10-08 | 深圳航天科技创新研究院 | Chemically bonded cementitious material, and preparation method and use method thereof |
| CN105693121A (en) * | 2016-03-02 | 2016-06-22 | 广西鱼峰水泥股份有限公司 | Maritime work Portland cement |
| CN109020270A (en) * | 2018-08-17 | 2018-12-18 | 华南理工大学 | A kind of high resistance to corrosion composite Portland cement and preparation method thereof |
| CN110950554A (en) * | 2018-09-26 | 2020-04-03 | 中国建筑材料科学研究总院有限公司 | High-corrosion-resistance low-shrinkage portland cement for ocean engineering and preparation method thereof |
| CN110950566A (en) * | 2018-09-26 | 2020-04-03 | 中国建筑材料科学研究总院有限公司 | High-corrosion-resistance submicron composite material and application thereof |
| CN110143771A (en) * | 2019-03-27 | 2019-08-20 | 华润水泥技术研发有限公司 | High-performance marine portland cement compound additive and marine worker portland cement |
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| Title |
|---|
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Application publication date: 20210817 |