CN116102304A - Super-heavy concrete prepared based on natural aggregate - Google Patents
Super-heavy concrete prepared based on natural aggregate Download PDFInfo
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- CN116102304A CN116102304A CN202211436969.4A CN202211436969A CN116102304A CN 116102304 A CN116102304 A CN 116102304A CN 202211436969 A CN202211436969 A CN 202211436969A CN 116102304 A CN116102304 A CN 116102304A
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- Prior art keywords
- concrete
- natural aggregate
- heavy concrete
- extra heavy
- aggregate
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- Pending
Links
- 239000004567 concrete Substances 0.000 title claims abstract description 77
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000004568 cement Substances 0.000 claims abstract description 17
- 239000000654 additive Substances 0.000 claims abstract description 3
- 230000000996 additive effect Effects 0.000 claims abstract 2
- 239000004576 sand Substances 0.000 claims description 17
- 239000000843 powder Substances 0.000 claims description 16
- 239000004575 stone Substances 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 3
- 239000011398 Portland cement Substances 0.000 claims 1
- 230000007547 defect Effects 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 25
- 239000003638 chemical reducing agent Substances 0.000 description 16
- 229910052742 iron Inorganic materials 0.000 description 15
- 238000002360 preparation method Methods 0.000 description 15
- 238000000034 method Methods 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 6
- 238000013461 design Methods 0.000 description 6
- 239000003469 silicate cement Substances 0.000 description 6
- 239000002002 slurry Substances 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 229920005646 polycarboxylate Polymers 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000009472 formulation Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 241000699650 Bolomys Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000002699 waste material 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
- C04B28/02—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 hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- 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
- C04B14/30—Oxides other than silica
- C04B14/308—Iron oxide
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses an extra heavy concrete prepared based on natural aggregate, which consists of cement, an additive and natural aggregate. The proposal adopts the density of more than 4600kg/m 3 The magnetite of the formula (I) is used as coarse and fine aggregate, so that the volume weight performance of the formed concrete is further improved, the bottleneck of the prior art is broken through, and the defects existing in the prior art can be effectively overcome.
Description
Technical Field
The invention relates to a building material, in particular to extra heavy concrete, which is mainly used for radiation protection engineering and engineering with counterweight requirements.
Background
With the development of medical science and technology and the improvement of protection function requirements of military engineering, radiation-proof concrete is increasingly designed and applied to the engineering projects, and the density requirements on the concrete are also higher.
The aggregate volume in the concrete is about 70%, and the volume weight of the concrete can be obviously improved by improving the aggregate density. But the density of the natural aggregate is generally not more than 5000kg/m 3 The density of the cement paste is about 1700kg/m 3 Theoretically prepared concrete has volume weight of maximum 4010kg/m 3 . However, due to the diagenetic character of natural rock, the iron ore density is generally 4600kg/m 3 ～4800kg/m 3 The volume weight of the prepared concrete is difficult to break through 4000kg/m 3 。
Therefore, how to effectively further increase the volume weight of concrete is a problem to be solved in the art.
Disclosure of Invention
Aiming at the problem that the volume weight of the existing super-heavy concrete has a bottleneck and cannot be further improved, the invention aims to provide the super-heavy concrete prepared based on natural aggregate, so that the volume weight performance of the formed concrete is further improved and the bottleneck of the prior art is broken through.
In order to achieve the above object, the present invention provides an extra heavy concrete formulated based on natural aggregate, which is composed of cement and admixture as well as natural aggregate.
Further, the natural aggregate density is not less than 4600kg/m 3 。
Further, the concrete is prepared according to the following mixing proportion, and the weight of the concrete is calculated according to each cubic concrete:
further, the stone powder content in the magnetite sand is 10-25%.
Further, stone powder in the magnetite sand is used as a cementing material to replace silicate cement with corresponding content.
Further, the maximum grain size of the magnetite ore is not more than 25mm.
The super-heavy concrete formed by the invention,the concrete capacity of the concrete is higher than 4010kg/m 3 The slump of the concrete is not less than 200mm, and the expansion degree is not less than 450mm.
The super-heavy concrete proposal provided by the invention adopts natural aggregate without adding artificial aggregates such as steel grit, steel balls and the like, and the prepared concrete has the capacity of more than 4100kg/m 3 The problems existing in the prior art can be effectively solved.
Detailed Description
The invention is further described below with reference to specific examples in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect achieved by the invention easy to understand.
In the preparation process of the existing concrete, the iron ore density is generally 4600kg/m due to the diagenetic property of natural rock 3 -4800kg/m 3 The density of the prepared concrete is difficult to break through 4000kg/m 3 。
The invention innovatively provides a scheme for preparing the extra heavy concrete by adopting the natural aggregate, and the prepared extra heavy concrete has the specific gravity of more than 4010kg/m 3 The slump of the concrete is not less than 200mm, and the expansion degree is not less than 450mm.
Specifically, the heavy concrete prepared by the invention adopts natural aggregate in the components except cement and additives.
The natural aggregate density in the invention is 4500-4800 kg/m 3 Preferably 4600kg/m 3 。
Further, the natural aggregate in the present invention is mainly composed of magnetite.
The invention accordingly provides specific proportions of the extra-heavy concrete, in terms of weight per cube (m 3 ) And (3) concrete meter:
on the basis, the invention also provides a further optimized preparation scheme.
In the preparation scheme of the extra heavy concrete provided by the invention, the adopted silicate cement is used as a corresponding cementing material, and conventional silicate cement can be adopted, and the action process is not described herein.
In the preparation scheme of the extra heavy concrete provided by the invention, the maximum grain diameter of the adopted magnetite is not more than 25mm, so that the excellent working performance under the condition of low water-gel ratio is ensured.
In the preparation scheme of the super-heavy concrete provided by the invention, the adopted magnetite sand and magnetite coarse aggregate jointly form a dense framework, and the gradation curve is adopted to adjust the gradation of coarse aggregate and fine aggregate, so that the grain size and sand rate of the magnetite sand are not limited.
Furthermore, in the preparation scheme of the extra heavy concrete provided by the invention, the adopted magnetite sand contains a certain amount of stone powder; meanwhile, the content of the magnetite powder is 10-25%.
In the scheme, the stone powder content in the magnetite sand is not limited, but the stone powder is innovatively used as cementing material to replace part of cement during calculation and trial preparation.
In the preparation scheme of the super-heavy concrete, the water-cement ratio is reduced by adding the water reducer, the strength is improved, the concrete density is improved, and the concrete workability is ensured.
As a preferable scheme, the water reducer adopts a high water reducing rate water reducer, such as a polycarboxylate water reducer and the like. The specific model specification is not limited, and can be determined according to actual requirements.
In the preparation scheme of the extra heavy concrete provided by the invention, a corresponding preparation method is further provided for the extra heavy concrete mixing proportion scheme.
The technical proposal of the invention innovates to prepare heavy concrete by adopting natural aggregate, and particularly adopts the concrete with the density of more than 4600kg/m 3 Magnetite of (a) as coarse and fine aggregates.
Further, the iron ore will produce iron ore fines with a particle size of less than 0.075mm during the crushing and screening process. If the method is designed according to the mixing proportion in the traditional concrete preparation, the stone powder content in the iron ore aggregate needs to be limited to ensure the mechanical property of the concrete.
The concrete preparation method provided by the invention overcomes the technical bias, and innovatively takes stone powder with the grain diameter smaller than 0.075mm in coarse and fine aggregate as powder material to participate in the slurry mixing proportion design; meanwhile, a Bolomy water-cement ratio formula is adopted to determine the water-cement ratio aiming at the slurry strength design, so that the mechanical property of the extra heavy concrete is ensured on the basis of the current theory.
On the basis, the scheme further adopts the high water reducing rate water reducer to adjust the rheological property of the slurry (containing stone powder); finally, the design of the extra-heavy concrete mixing proportion is completed according to the volume of the slurry being 0.32.
Compared with the traditional mix proportion design method, the concrete scheme provided by the invention innovatively takes magnetite powder with the density far greater than that of cement particles as slurry, so that the density of the slurry is increased, and the volume weight of the concrete is further improved.
Furthermore, the concrete scheme provided by the invention is convenient to prepare, the mixing ratio provided by the scheme is directly stirred during operation, and the dosage of magnetite and the dosage of the water reducer are changed according to the volume weight and the workability design requirement of the concrete until the design requirement is met, so that the concrete scheme is easy to implement.
The invention will be further illustrated with reference to specific examples. It is to be understood that these examples are illustrative of the present invention and are not intended to limit the scope of the present invention. The experimental procedures, which are not specified in the following examples, are generally determined according to national standards. If the corresponding national standard does not exist, the method is carried out according to the general international standard, the conventional condition or the condition recommended by the manufacturer.
Unless defined or otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. In addition, any method and material similar or equivalent to those described may be used in the methods of the present invention.
Example 1
The fineness modulus of the magnetite sand which is tried to be selected in the example is 2.5, the stone powder content is 16 percent, and the apparent density is 4600kg/m 3 。
The maximum grain diameter of the selected iron ore is 20mm, and the apparent density is 4800kg/m 3 。
The water reducer is a polycarboxylate water reducer, and the water reducing rate is 34%.
The cement is p.o42.5 common silicate cement.
Meanwhile, concrete is prepared according to the following mixing proportion in the table:
| cement/kg | Water/kg | Water reducing agent/kg | Iron ore sand/kg | Iron ore/kg |
| 302 | 107 | 20 | 1062 | 2534 |
Performance testing is carried out on the formed extra heavy concrete, and finally the slump of the extra heavy concrete is 220mm, the expansion degree is 450mm, and the volume weight is 4011kg/m 3 . The compressive strength of 28d is 48.6MPa, and the preparation requirement of the C35 strength grade is met.
Example 2
The fineness modulus of the magnetite sand which is tried to be selected in the example is 2.5, the stone powder content is 18 percent, and the apparent density is 4700kg/m 3 。
The maximum grain diameter of the selected iron ore is 22mm, and the apparent density is 4900kg/m 3 。
The water reducer is a polycarboxylate water reducer, and the water reducing rate is 34%.
The cement is p.o42.5 common silicate cement.
Meanwhile, concrete is prepared according to the following mixing proportion in the table:
| cement/kg | Water/kg | Water reducing agent/kg | Iron ore sand/kg | Iron ore/kg |
| 320 | 108 | 22 | 1070 | 2555 |
Performance testing was performed on the formed extra heavy concrete, and finally the slump of the extra heavy concrete was 240mm, the expansion degree was 465mm, and the volume weight was 4013kg/m 3 .28d of compressive strength of 49.6MPa, and meets the preparation requirement of C35 strength grade.
Example 3
The fineness modulus of the magnetite sand which is tried to be selected in the example is 2.5, the stone powder content is 20 percent, and the apparent density is 4800kg/m 3 。
The maximum grain diameter of the selected iron ore is 18mm, and the apparent density is 4900kg/m 3 。
The water reducer is a polycarboxylate water reducer, and the water reducing rate is 34%.
The cement is p.o42.5 common silicate cement.
Meanwhile, concrete is prepared according to the following mixing proportion in the table:
| cement/kg | Water/kg | Water reducing agent/kg | Iron ore sand/kg | Iron ore/kg |
| 340 | 105 | 23 | 1080 | 2570 |
Performance testing is carried out on the formed extra heavy concrete, and finally the slump of the extra heavy concrete is 220mm, the expansion degree is 450mm, and the volume weight is 4014kg/m 3 . The compressive strength of 28d is 48.6MPa, and the preparation requirement of the C35 strength grade is met.
Comparative example
The present example gives a formulation scheme for conventional extra heavy concrete based on conventional scheme.
The extra heavy concrete is prepared by adopting waste steel sand of a steel mill as fine aggregate, and the mixing ratio is as follows:
| cement/kg | Water/kg | Water reducing agent/kg | Steel grit/kg | Iron ore/kg |
| 343 | 160 | 5.5 | 1535 | 1877 |
Performance testing was performed on the resulting extra heavy concrete, which was finally given a volume weight of 3850kg/m 3 The price of the steel sand is high, and the carbon emission factor is far higher than that of natural magnetite.
As can be seen from the above examples, the natural aggregate-based formulation of the invention provides an extra heavy concrete scheme which can break through the bottleneck of the prior art, and the volume weight of the prepared concrete effectively breaks through 4000kg/m 3 Can be well applied to engineering projects with high counterweight requirements.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. The super heavy concrete prepared based on the natural aggregate is characterized in that the concrete consists of cement, an additive and the natural aggregate.
2. The natural aggregate-based formulated extra heavy concrete according to claim 1 wherein the natural aggregate density is not less than 4600kg/m 3 。
3. The natural aggregate-based formulated extra heavy concrete according to claim 2, wherein the concrete is formulated in the following mix proportions per cubic concrete:
4. the natural aggregate-based formulated extra heavy concrete according to claim 3 wherein the stone powder content in the magnetite sand is 10% to 25%.
5. The natural aggregate-based formulated extra heavy concrete according to claim 4 wherein stone powder in the magnetite sand is used as a cementing material to replace portland cement of corresponding content.
6. The natural aggregate-based formulated extra heavy concrete according to claim 3 wherein the maximum particle size of magnetite ore is not more than 25mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211436969.4A CN116102304A (en) | 2022-11-16 | 2022-11-16 | Super-heavy concrete prepared based on natural aggregate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211436969.4A CN116102304A (en) | 2022-11-16 | 2022-11-16 | Super-heavy concrete prepared based on natural aggregate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116102304A true CN116102304A (en) | 2023-05-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211436969.4A Pending CN116102304A (en) | 2022-11-16 | 2022-11-16 | Super-heavy concrete prepared based on natural aggregate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116102304A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2796661A2 (en) * | 2013-03-27 | 2014-10-29 | SCHWENK Zement KG | Method of filling a space with a free-flowing filling compound, dry mixture and free-flowing filling compound made from same |
| CN107382185A (en) * | 2017-06-30 | 2017-11-24 | 中国铁建港航局集团有限公司 | A kind of C50 high performance concretes prepared with high content stone powder aggregate chips |
| CN107698220A (en) * | 2017-10-19 | 2018-02-16 | 内蒙古巨力新型建材有限公司 | A kind of anti-electromagnetic-radiation environment-friendly type inner wall mortar |
| CN109824324A (en) * | 2019-04-04 | 2019-05-31 | 中国核动力研究设计院 | A kind of concrete being used to prepare Radwastes treatment packing container and application |
| CN112521076A (en) * | 2020-12-15 | 2021-03-19 | 中国十七冶集团有限公司 | Iron tailing high-slump high-strength conductive concrete and preparation method thereof |
| CN114702279A (en) * | 2022-03-29 | 2022-07-05 | 武汉明华鸿昌新型建材有限责任公司 | Heavy-density radiation-proof concrete for protecting proton center in hospital and preparation method thereof |
| CN114804770A (en) * | 2022-05-06 | 2022-07-29 | 上海建工建材科技集团股份有限公司 | Iron ore radiation-proof concrete and preparation method thereof |
-
2022
- 2022-11-16 CN CN202211436969.4A patent/CN116102304A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2796661A2 (en) * | 2013-03-27 | 2014-10-29 | SCHWENK Zement KG | Method of filling a space with a free-flowing filling compound, dry mixture and free-flowing filling compound made from same |
| CN107382185A (en) * | 2017-06-30 | 2017-11-24 | 中国铁建港航局集团有限公司 | A kind of C50 high performance concretes prepared with high content stone powder aggregate chips |
| CN107698220A (en) * | 2017-10-19 | 2018-02-16 | 内蒙古巨力新型建材有限公司 | A kind of anti-electromagnetic-radiation environment-friendly type inner wall mortar |
| CN109824324A (en) * | 2019-04-04 | 2019-05-31 | 中国核动力研究设计院 | A kind of concrete being used to prepare Radwastes treatment packing container and application |
| CN112521076A (en) * | 2020-12-15 | 2021-03-19 | 中国十七冶集团有限公司 | Iron tailing high-slump high-strength conductive concrete and preparation method thereof |
| CN114702279A (en) * | 2022-03-29 | 2022-07-05 | 武汉明华鸿昌新型建材有限责任公司 | Heavy-density radiation-proof concrete for protecting proton center in hospital and preparation method thereof |
| CN114804770A (en) * | 2022-05-06 | 2022-07-29 | 上海建工建材科技集团股份有限公司 | Iron ore radiation-proof concrete and preparation method thereof |
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