CN114804770B - Iron ore anti-radiation concrete and preparation method thereof - Google Patents
Iron ore anti-radiation concrete and preparation method thereof Download PDFInfo
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- CN114804770B CN114804770B CN202210487990.0A CN202210487990A CN114804770B CN 114804770 B CN114804770 B CN 114804770B CN 202210487990 A CN202210487990 A CN 202210487990A CN 114804770 B CN114804770 B CN 114804770B
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- 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
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- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00258—Electromagnetic wave absorbing or shielding materials
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- 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
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention provides iron ore radiation-proof concrete and a preparation method thereof, wherein the iron ore radiation-proof concrete comprises the following components in parts by weight: 1400-1800 parts of iron ore coarse aggregate, 1000-1400 parts of iron ore fine aggregate, 240-400 parts of high-boron glass powder, 260-350 parts of cement, 60-100 parts of fly ash, 40-70 parts of steel slag micro powder, 160-200 parts of water, 5.0-8.0 parts of water reducer and 6.0-9.0 parts of fiber; the grain size of the high-boron glass powder is less than 150 mu m, the silicon dioxide content is 36-39%, the boron oxide content is 29-30%, and the apparent density is 2158kg/m 3 The apparent density of the iron ore anti-radiation concrete is not less than 3350kg/m 3 The strength is not lower than 45MPa, and the boron content is not lower than 0.8% of the mass of the dried concrete. The iron ore radiation-proof concrete provided by the invention can effectively shield various radiations such as X rays, gamma rays, neutron rays and the like, has good working performance and mechanical properties, is convenient for transportation and construction, and can be used in large-scale radiation-proof engineering construction.
Description
Technical Field
The invention relates to the technical field of nuclear power engineering, in particular to iron ore radiation-proof concrete and a preparation method thereof.
Background
Concrete is the most widely used and economical radiation protection material at present, and the shielding effect mainly depends on the apparent density of the concrete and the content of light elements such as hydrogen, boron, lithium and the like. Iron ore has high volume weight, is often used as aggregate for radiation-proof concrete, can effectively shield X and gamma rays, but has poor neutron ray-proof capability, easy segregation and poor concrete workability. In addition, cement hydration in the large-volume radiation protection engineering has large heat release, is easy to crack and has poor durability, so that the radiation shielding effect is obviously reduced.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide iron ore radiation-proof concrete which can effectively shield various radiations such as X, gamma, neutron rays and the like, has good working performance while guaranteeing strength, has low hydration heat release and can be applied to large-volume radiation-proof engineering construction in a large scale. Meanwhile, the invention also provides a preparation method of the iron ore radiation-proof concrete.
To achieve the above and other related objects, the present invention adopts the following technical solutions:
according to a first aspect of the invention, the invention provides iron ore radiation-proof concrete, which comprises the following components in parts by weight: 1400-1800 parts of iron ore coarse aggregate, 1000-1400 parts of iron ore fine aggregate, 240-400 parts of high-boron glass powder, 260-350 parts of cement, 60-100 parts of fly ash, 40-70 parts of steel slag micro powder, 160-200 parts of water, 5.0-8.0 parts of water reducer and 6.0-9.0 parts of fiber; the grain size of the high-boron glass powder is less than 150 mu m, the silicon dioxide content is 36-39%, the boron oxide content is 29-30%, and the apparent density is 2158kg/m 3 The apparent density of the iron ore anti-radiation concrete is not less than 3350kg/m 3 The strength is not lower than 45MPa, and the boron content is not lower than 0.8% of the mass of the dried concrete.
As a preferable technical scheme, the adhesive comprises the following components in parts by weight: 1500 parts of iron ore coarse aggregate, 1140 parts of iron ore fine aggregate, 360 parts of high-boron glass powder, 300 parts of cement, 90 parts of pulverized fuel ash steel slag micropowder, 60 parts of water 190 parts, 6.75 parts of water reducer and 7.5 parts of fiber.
As a preferable technical scheme, the coarse aggregate is iron ore with the thickness of 2.5-25mm and the apparent density of 4500kg/m 3 The close-packed porosity was 43%.
As a preferable technical scheme, the fine aggregate is 0-5mm iron ore sand, the fineness modulus is 2.6-3.0, and the apparent density is 5660kg/m 3 The close-packed porosity was 43.6%.
As a preferred technical scheme, the cement is P.O 42.5.42.5 cement.
As a preferable technical scheme, the grain size of the steel slag micro powder is 40-80um, and the apparent density is 3340kg/m 3 。
As a preferable technical scheme, the fiber is polypropylene fiber, the fiber fineness is 2-5dtex, and the length is 3-10mm.
As a preferable technical scheme, the water reducer is a high-efficiency polycarboxylate water reducer.
In a second aspect of the present invention, there is provided a method for preparing iron ore radiation protection concrete, for preparing the iron ore radiation protection concrete, comprising the steps of:
step one, adding a water reducer into water, and uniformly stirring and mixing to obtain a mixed solution;
adding iron ore, iron ore sand, high boron glass powder, cement, fly ash and steel slag micropowder into a stirrer, and dry stirring for 1min;
and thirdly, adding the mixed solution obtained in the first step into the mixture obtained in the second step, stirring for 2min, and then adding the polypropylene fibers, and stirring until the mixture is uniformly mixed.
The iron ore aggregate has high density and large volume weight, can obviously increase the apparent density of the concrete and improve the capability of the concrete for shielding X-rays and gamma-rays, but is easy to sink, isolate and has poor concrete workability, so that the grain size range and grading distribution of the iron ore coarse and fine aggregates need to be strictly controlled. Iron ore sand belongs to machine-made sand, is often unfavorable for the workability of concrete, and is also crucial to control the fineness modulus.
The high-boron glass powder can obviously increase the boron element content in iron ore concrete, thereby improving the neutron radiation resistance. In addition, the powdery high-boron glass has small particle size and large specific surface area, has certain water absorption, can increase the consistency of concrete on one hand, and prevents the settlement of aggregate and the segregation of concrete; on the other hand, the cement hydration can be delayed, the temperature rise can be reduced, and the occurrence of temperature cracks can be restrained. However, the high boron glass powder is excessively high in doping amount, the apparent density of the concrete is obviously reduced, and early strength development is inhibited, so that the doping amount of the high boron glass powder needs to be controlled within a reasonable range according to the strength, working performance and shielding performance requirements of the concrete.
The fly ash can effectively improve the working performance of concrete, reduce the cement consumption, reduce the hydration heat release of cement, avoid too fast temperature rise and prevent the occurrence of temperature cracks in mass concrete engineering. In addition, the fly ash has filling effect and pozzolanic effect, and is beneficial to the development of the later strength of concrete.
The steel slag micropowder as a mineral admixture has a plurality of advantages: firstly, the cement consumption is reduced, the hydration heat release is reduced, and the occurrence of concrete temperature cracks is avoided; secondly, the thickening effect is achieved, the workability of concrete can be improved, and segregation and bleeding are prevented; thirdly, the concrete has micro-expansion characteristic, and the plastic shrinkage cracking of the mass concrete is restrained to a certain extent; fourth, have higher apparent density, and the granule is tiny, has the filling effect, improves concrete microstructure to improve concrete radiation shielding performance to a certain extent.
The polypropylene fiber has a thickening effect on one hand, can prevent iron ore aggregate with high volume weight from sinking to a certain extent, and can isolate concrete, on the other hand, can effectively prevent the concrete from generating plastic shrinkage cracks, improve the brittleness of the concrete and improve the durability of the concrete.
As described above, the iron ore radiation-proof concrete of the invention has the following beneficial effects:
(1) The high-boron glass powder has the functions of water absorption and thickening, can improve the workability of concrete, prevent heavy aggregate from sinking and segregating, delay the hydration of cement, reduce hydration heat release, inhibit the generation of temperature cracks, obviously increase the boron element content of the concrete and improve the neutron radiation shielding capability of the concrete.
(2) The steel slag powder disclosed by the invention has high apparent density and fine particles, can replace cement, improves the workability of concrete, reduces hydration heat release, has a filling effect and a micro-expansion effect, improves the microstructure of the concrete, and therefore inhibits shrinkage cracking of large-volume concrete pouring to a certain extent, and is favorable for the stable development of later-stage strength and the improvement of shielding performance.
(3) The polypropylene fiber has a thickening effect on one hand, prevents the iron ore radiation-proof concrete from sinking and segregating, and can improve the crack resistance of the iron ore radiation-proof concrete and prevent early cracks from occurring on the other hand.
(4) The iron ore radiation-proof concrete provided by the invention can effectively shield various radiations such as X rays, gamma rays, neutron rays and the like, has good working performance and mechanical properties, is convenient for transportation and construction, and can be used in large-scale radiation-proof engineering construction.
Detailed Description
Further advantages and effects of the present invention will become apparent to those skilled in the art from the disclosure of the present invention, which is described by the following specific examples.
The various raw material types, compositions, models, and basic performance indexes in this example are shown below.
Coarse aggregate: iron ore with particle size of 2.5-25mm and apparent density of 4500kg/m 3 The close-packed porosity is 43%, the water content is 3%, and the needle-like content is 5%. The cumulative screen residue of the iron ore coarse aggregate is shown in table 1.
TABLE 1
Fine aggregate: ore sand with particle size of 0-5mm, fineness modulus of 2.9 and apparent density of 5660kg/m 3 The close-packed porosity was 43.6% and the water content was 5%.
High boron glass powder: particle size of 0-150um and silicon dioxide content of 36-39The boron oxide content is 29-30%, the apparent density 2158kg/m 3 。
And (3) cement: P.O 42.5A cement with apparent density of 3100kg/m 3 。
Fly ash: class II fly ash, apparent density 2200kg/m 3 。
Steel slag micropowder: particle size of 40-80um, apparent density of 3340kg/m 3 。
Polypropylene fibers: the fiber fineness is 2-5dtex, and the length is 3-10mm.
Water reducing agent: 803 high-efficiency polycarboxylate water reducer is produced in Shanghai Jian Gongmaiston.
The preparation method of the iron ore radiation-proof concrete of the embodiment comprises the following steps:
adding 5.0-8.0 parts of water reducer into 160-200 parts of water, and uniformly stirring and mixing to obtain a mixed solution; adding 1400-1800 parts of iron ore, 1000-1400 parts of iron ore sand, 240-400 parts of high-boron glass powder, 260-350 parts of cement, 60-100 parts of fly ash and 40-70 parts of steel slag micro powder into a stirrer, and dry stirring for 1min; adding the mixed solution and stirring for 2min; adding 6.0-9.0 parts of polypropylene fiber, and stirring until the mixture is uniformly mixed.
Example 1
The properties of the iron ore anti-radiation concrete are shown in Table 1.
TABLE 1
Example 2
The properties of the iron ore anti-radiation concrete are shown in Table 2.
TABLE 2
Example 3
The properties of the iron ore anti-radiation concrete are shown in Table 3.
TABLE 3 Table 3
Example 4
The properties of the iron ore anti-radiation concrete are shown in Table 4.
TABLE 4 Table 4
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (7)
1. The iron ore radiation-proof concrete is characterized by comprising the following components in parts by weight: 1400-1800 parts of iron ore coarse aggregate, 1000-1400 parts of iron ore fine aggregate, 240-400 parts of high-boron glass powder, 260-350 parts of cement, 60-100 parts of fly ash, 40-70 parts of steel slag micro powder, 160-200 parts of water, 5.0-8.0 parts of water reducer and 6.0-9.0 parts of fiber; the grain size of the high-boron glass powder is less than 150 mu m, the silicon dioxide content is 36-39%, the boron oxide content is 29-30%, and the apparent density is 2158kg/m 3 The method comprises the steps of carrying out a first treatment on the surface of the The grain diameter of the steel slag micro powder is 40-80um, and the apparent density is 3340kg/m 3 The method comprises the steps of carrying out a first treatment on the surface of the The fiber is polypropylene fiber, the fiber fineness is 2-5dtex, and the length is 3-10mm; the apparent density of the iron ore anti-radiation concrete is not less than 3350kg/m 3 The strength is not lower than 45MPa, and the boron content is not lower than 0.8% of the mass of the dried concrete.
2. The iron ore radiation-proof concrete according to claim 1, which comprises the following components in parts by weight: 1500 parts of iron ore coarse aggregate, 1140 parts of iron ore fine aggregate, 360 parts of high-boron glass powder, 300 parts of cement, 90 parts of fly ash, 60 parts of steel slag micro powder, 190 parts of water, 6.75 parts of water reducer and 7.5 parts of fiber.
3. The iron ore radioresistant concrete according to claim 1 or 2, wherein said coarse aggregate is 2.5-25mm iron ore having an apparent density of 4500kg/m 3 The close-packed porosity was 43%.
4. The iron ore radioresistant concrete according to claim 1 or 2, wherein said fine aggregate is 0-5mm iron ore sand, fineness modulus2.6-3.0, apparent density 5660kg/m 3 The close-packed porosity was 43.6%.
5. The iron ore radioresistant concrete of claim 1 or 2 wherein said cement is P.O 42.5 cement.
6. The iron ore radioresistant concrete of claim 1 or 2 wherein said water reducing agent is a high efficiency polycarboxylate water reducing agent.
7. A method for preparing the iron ore radiation protection concrete according to any one of claims 1 to 6, comprising the steps of:
step one, adding a water reducer into water, and uniformly stirring and mixing to obtain a mixed solution;
adding iron ore, iron ore sand, high boron glass powder, cement, fly ash and steel slag micropowder into a stirrer, and dry stirring for 1min;
and thirdly, adding the mixed solution obtained in the first step into the mixture obtained in the second step, stirring for 2min, and then adding the polypropylene fibers, and stirring until the mixture is uniformly mixed.
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| US20180114605A1 (en) * | 2015-06-19 | 2018-04-26 | Neuboron Medtech Ltd. | Shielding material for shielding radioactive ray and preparation method thereof |
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| CN102219459A (en) * | 2011-04-02 | 2011-10-19 | 武汉理工大学 | Radiation shield concrete and preparation method thereof |
| CN104529297B (en) * | 2014-12-18 | 2016-08-24 | 广东省建筑工程集团有限公司 | A kind of low hydration heat baryte of anti-neutron irradiation |
| CN108484057B (en) * | 2018-06-01 | 2021-05-18 | 中建商品混凝土有限公司 | Large-volume anti-cracking radiation-proof concrete based on waste glass and preparation method thereof |
| CN114195447A (en) * | 2021-11-30 | 2022-03-18 | 广州市市政工程机械施工有限公司 | Iron scrap-hematite weight-allocated concrete and preparation method thereof |
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| US20180114605A1 (en) * | 2015-06-19 | 2018-04-26 | Neuboron Medtech Ltd. | Shielding material for shielding radioactive ray and preparation method thereof |
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| 散裂中子源工程防中子辐射重混凝土配合比研究;杨医博等;《工业建筑》;第49卷(第5期);第97、103-108页 * |
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Effective date of registration: 20230406 Address after: 200120 Southwest District, 2123 Pudong Road, Pudong New Area, Shanghai. Applicant after: Shanghai Construction Engineering Building Materials Technology Group Co.,Ltd. Applicant after: Kunshan Shenghua Concrete Co.,Ltd. Applicant after: Shanghai Construction Engineering Ru'an Concrete Co.,Ltd. Address before: 200120 Southwest District, 2123 Pudong Road, Pudong New Area, Shanghai. Applicant before: Shanghai Construction Engineering Building Materials Technology Group Co.,Ltd. Applicant before: Kunshan Shenghua Concrete Co.,Ltd. |
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