CN113666685B - Low-hydration-heat high-heat-conductivity radiation-proof concrete and preparation method thereof - Google Patents
Low-hydration-heat high-heat-conductivity radiation-proof concrete and preparation method thereof Download PDFInfo
- Publication number
- CN113666685B CN113666685B CN202110948012.7A CN202110948012A CN113666685B CN 113666685 B CN113666685 B CN 113666685B CN 202110948012 A CN202110948012 A CN 202110948012A CN 113666685 B CN113666685 B CN 113666685B
- Authority
- CN
- China
- Prior art keywords
- parts
- concrete
- ceramsite
- heat
- radiation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
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
-
- 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
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
-
- 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
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
-
- 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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/06—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by burning-out added substances by burning natural expanding materials or by sublimating or melting out added substances
- C04B38/063—Preparing or treating the raw materials individually or as batches
- C04B38/0635—Compounding ingredients
- C04B38/0645—Burnable, meltable, sublimable materials
- C04B38/0675—Vegetable refuse; Cellulosic materials, e.g. wood chips, cork, peat, paper
-
- 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
-
- 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
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant materials
-
- 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
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
- C04B2235/606—Drying
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
- C04B2235/6567—Treatment time
-
- 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
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Dispersion Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a low-hydration-heat high-thermal-conductivity radiation-proof concrete, which relates to the field of building materials and comprises the following components in parts by weight: 410-420 parts of cement, 50-60 parts of fly ash, 30-35 parts of limonite powder, 750-760 parts of river sand and 970-980 parts of modified ceramsite. The iron ore tailing powder is added into the modified ceramsite raw material, the iron powder is added into the coating material, ferrous glycinate is adsorbed into the modified ceramsite, so that the radiation-proof performance of concrete is better, and meanwhile, under the synergistic effect of various iron element compounds, the effect of enhancing the whole heat-conducting performance of the concrete is realized, the hydration heat of the concrete is easier to transfer to the outside, and meanwhile, the modified ceramic can also absorb the heat generated inside the concrete more quickly, so that the internal and external temperature difference of the concrete is balanced, and the effect of reducing the hydration heat of the concrete is realized.
Description
Technical Field
The invention relates to the field of building materials, in particular to low-hydration-heat high-heat-conductivity radiation-proof concrete and a preparation method thereof.
Background
The radiation-proof concrete with low hydration heat and high thermal conductivity is also called shielding concrete and radiation-proof concrete. The concrete has large volume weight, has shielding capability to gamma rays, X rays or neutron radiation, and is not easy to be penetrated by radioactive rays. The cementing material is usually Portland cement with low hydration heat, or special cement such as high alumina cement, barium cement, magnesia cement and the like. Barite, magnetite, limonite, waste iron block, etc. are used as aggregate. The penetration strength of the neutron flux can be weakened by adding substances containing boron, cadmium, lithium and the like. Is often used as a substitute for expensive radio-shielding materials such as lead and steel. Concrete for shielding the effects of X-rays, gamma-rays and neutron radiation. The device is used for protecting nuclear reactors, particle accelerators and radioactive isotope equipment of industrial, agricultural and scientific research departments. At present, the construction of concrete engineering in China develops fiercely, and the technique is skillful, and the real-time monitoring technique of its construction back concrete is used extensively, can accurate control concrete construction speed and the accurate safe state of holding its operation phase.
In the prior art, for example, an invention patent with application number CN201310702343.8 discloses a radiation-proof concrete with low hydration heat and high thermal conductivity, which comprises, by weight, 100 parts of cement, 40-50 parts of bentonite, 20-25 parts of water, 20-23 parts of sodium fluosilicate, 10-16 parts of calcium carbonate, 4-9 parts of zirconium oxide, 2-5 parts of silicon dioxide and 0.5-1.5 parts of magnetite.
The anti-radiation concrete with low hydration heat and high thermal conductivity is different from common cement concrete, not only has large apparent density and more bound water, but also requires higher thermal conductivity (causing the local temperature rise to be minimum), low thermal expansion coefficient (causing the strain generated by the temperature rise to be minimum), small drying shrinkage rate (causing the temperature difference strain to be minimum), and also requires that the concrete has good homogeneity, is not allowed to have defects such as cavities, cracks and the like, and has certain structural strength and fire resistance.
Although the radiation protection performance of the concrete is improved by doping the metal substance components into the concrete in the prior art, the addition of the metal substance is not considered to reduce the adhesive property between other components in the concrete, so that the mechanical property of the radiation protection concrete with low hydration heat and high thermal conductivity is influenced, and the defect of easy cracking exists, so that the defect of weak radiation protection effect is caused.
Disclosure of Invention
The invention discloses a radiation-proof concrete with low hydration heat and high thermal conductivity, aiming at the problem that the radiation-proof concrete with low hydration heat and high thermal conductivity is easy to crack. Specifically, the following technique is used.
The radiation-proof concrete with low hydration heat and high thermal conductivity comprises the following components in parts by weight: 410-420 parts of cement, namely cement,
50-60 parts of fly ash, 30-35 parts of limonite powder, 750-760 parts of river sand and 970-980 parts of modified ceramsite; the modified ceramsite is prepared by the following method:
step 1, weighing the raw materials of the modified ceramsite: 5-10 parts of plant fiber, 60-70 parts of iron ore tailing powder, 30-40 parts of clay and 10-25 parts of water;
step 2, drying the plant fibers in the step 1 and grinding the dried plant fibers into powder;
step 3, uniformly stirring and mixing the clay, the iron ore tailing powder and the water in the step 1 and the plant fiber powder in the step 2 into a cluster, and drying at 80-120 ℃;
step 4, crushing the material mixed dough dried in the step 3 into particles with the particle size of 10-20 mm;
step 5, roasting the material mixed particles in the step 3 into ceramsite at 800-1200 ℃, and roasting for 4-6h;
step 6, weighing ferrous glycinate, dissolving the ferrous glycinate in water, heating to 80 ℃ to prepare a saturated aqueous solution of the ferrous glycinate, putting the ceramsite obtained in the step 5 into the solution, keeping the temperature of 80 ℃ constant, ultrasonically stirring for 30min, taking out, cooling and drying;
step 7, weighing an organic phase-change material at the temperature of 30-45 ℃, and heating the organic phase-change material to be in a liquid state, wherein the mass ratio of the organic phase-change material to the ceramsite in the step 6 is 1.5:1;
step 8, vacuumizing the ceramsite in the step 6 until the vacuum pressure is above 80KPa, adding the liquid organic phase-change material in the step 7, stirring for 30min, and taking out the ceramsite;
step 9, coating a polymer composite film layer on the ceramsite in the step 8, wherein the polymer composite film layer is composed of epoxy resin, a curing agent and iron powder, and the volume ratio of the epoxy resin to the curing agent to the iron powder is 12:12:1. the curing agent is a curing agent which does not generate adverse effects such as corrosion on the ceramsite, such as a polyamide epoxy resin curing agent.
The invention provides a low-hydration-heat high-thermal-conductivity radiation-proof concrete, which contains a large amount of iron elements and crystal water in limonite, the radiation-proof performance of the concrete is greatly improved by adding the limonite powder instead of part of cement, and the concrete can have a good effect of reducing the hydration heat of the concrete.
Preferably, in the step 1, the modified ceramsite raw material comprises, by weight, 10 parts of plant fiber, 60 parts of iron ore tailing powder, 40 parts of clay and 20 parts of water.
Preferably, the mass ratio of the step 4 is (1-2): 1:1 are respectively ground into particles with the particle diameters of 10-12mm, 13-16mm and 17-20 mm.
The graded ingredients are used as the coarse aggregate of the concrete, so that the stacking density of particles can be improved, and the compressive strength of the concrete can be improved.
Preferably, in the step 4, the mass ratio of 1:1:1 grinding into particles with the particle diameters of 10-12mm, 13-16mm and 17-20mm respectively.
Grinding into particles with the particle diameters of 10-12mm, 13-16mm and 17-20mm, wherein the mass ratio of the particles is 1:1:1, the concrete has better pressure resistance under the condition of not influencing the radiation protection effect of the concrete.
Preferably, the calcination temperature in step 5 is 1100 ℃ for 5 hours.
The baking temperature of the ceramsite is not low or high, the strength of the ceramsite is low when the temperature is low, and pore channels in the ceramsite are blocked and adhered when the temperature is high.
Preferably, the organic phase change material is dodecanoic acid.
The melting point of the dodecanoic acid is about 40 ℃, and the dodecanoic acid is selected as an organic phase change material to effectively absorb the hydration heat of the concrete and avoid the overhigh temperature peak value of the hydration heat of the concrete.
More preferably, the plant fiber in step 2 is straw.
The straw fiber is long and thin, and when the straw fiber is ground into powder and mixed with other materials to be fired into ceramsite, the ceramsite can obtain a continuous through pore channel, so that heat transfer is facilitated, and the phase-change material can absorb heat in concrete more quickly.
Preferably, the low hydration heat and high thermal conductivity radiation-proof concrete comprises the following components in parts by weight: 420 parts of cement; 60 parts of fly ash; 35 parts of limonite powder; 760 parts of river sand; 980 parts of modified ceramsite.
Preferably, the preparation method of the radiation-proof concrete with low hydration heat and high thermal conductivity comprises the following steps:
mixing limonite powder, river sand and modified ceramsite, adding 1/2 of the total amount of water, stirring for 60s, adding cement, fly ash and the rest water, and stirring uniformly to obtain the low-hydration-heat high-heat-conductivity radiation-proof concrete.
Compared with the prior art, the invention has the advantages that:
1. according to the invention, the plant fiber powder is added into the modified ceramsite, and then the plant fiber powder is burnt out in the roasting process, so that the prepared ceramsite is in a three-dimensional porous structure, and simultaneously, the porous structure of the ceramsite is utilized to adsorb ferrous glycinate, so that the ratio of metal elements and hydrogen elements in the concrete raw material is increased, and the radiation resistance of the concrete is improved.
2. According to the invention, the organic phase-change material is adsorbed by the porous structure of the ceramsite, and the modified ceramsite is coated after the organic phase-change material is solidified, so that the effect of reducing the hydration heat of the concrete by using the modified ceramsite is realized, and the possibility of generating cracks due to the hydration heat reaction of the concrete is reduced.
3. The invention utilizes limonite powder to replace part of cement, thereby reducing the hydration heat of concrete, simultaneously adds iron ore tailing powder in the raw material of modified ceramsite, adds iron powder in the coating material, adsorbs ferrous glycinate in the modified ceramsite, leads the radiation-proof performance of the concrete to be better through the addition of a plurality of iron elements, simultaneously realizes the effect of enhancing the whole heat-conducting performance of the concrete under the synergistic action of various iron element compounds, leads the hydration heat of the concrete to be easier to be transferred to the outside, and simultaneously leads the modified ceramic to absorb the heat generated inside the concrete more quickly, thereby balancing the internal and external temperature difference of the concrete and realizing the effect of reducing the hydration heat of the concrete.
Detailed Description
The technical solutions of the present invention will be described clearly and completely below, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The radiation-proof concrete with low hydration heat and high thermal conductivity provided by the following examples and comparative examples is prepared by adopting the following method:
and mixing the limonite powder, the river sand and the modified ceramsite, adding 1/2 of the total amount of water, stirring for 60s, adding the cement, the fly ash, the expanding agent and the additive, and stirring with the rest of water to obtain the low-hydration-heat high-heat-conductivity radiation-proof concrete.
The limonite, iron ore tailings, epoxy resin and curing agent used in the following examples and comparative examples all adopt the following products:
the content of the limonite Fe2O3 is more than or equal to 70 percent, and the content of impurities is less than 0.5 percent.
The epoxy resin used was bisphenol A type epoxy resin (E-44) produced from the petrochemical baclin.
The curing agent was a polyamide 651 epoxy resin catalyst purchased from Shunhua New materials, inc., guangdong.
The iron ore tailings comprise the following chemical components: 263-71% of SiO, 31-6% of Al2O, 310-20% of Fe2O, 2-5% of CaO, 3-5% of MgO, 1-3% of K2O, 1-3.5% of Na2O, 30.01-3% of SO and 0.01-0.02% of Cl; the loss on ignition of the iron ore tailings is 1-3%. The fineness of the iron ore tailings is less than 1.0mm, and the fineness modulus is 1.0-1.4.
The dodecanoic acid was purchased from Nantong Youzhou chemical Co., ltd, with analytical purity (AR) of not less than 98% and melting point range of 42.0-45.0 ℃.
Example 1
The radiation-proof concrete with low hydration heat and high thermal conductivity prepared by the invention comprises the following components in parts by weight: 420 parts of cement; 60 parts of fly ash; 35 parts of limonite powder; 760 parts of river sand; 980 parts of modified ceramsite.
The modified ceramsite is prepared by the following method:
step 1, weighing raw materials of modified ceramsite: 10 parts of straw, 60 parts of iron ore tailing powder, 40 parts of clay and 25 parts of water;
step 2, drying the straws in the step 1 and grinding the straws into powder;
step 3, stirring and uniformly mixing the clay and the water in the step 1, the straw powder and the iron ore tailing powder in the step 2, agglomerating, and drying at 80-120 ℃;
step 4, mixing the dried material mixed mass in the step 3 according to the mass ratio of 1:1:1 are respectively crushed into particles with the particle diameters of 10-12mm, 13-16mm and 17-20 mm;
step 5, roasting the material mixed particles in the step 3 into ceramsite at 1100 ℃, and roasting for 5 hours;
step 6, weighing ferrous glycinate, dissolving the ferrous glycinate in water, heating to 80 ℃ to prepare a saturated aqueous solution of the ferrous glycinate, putting the ceramsite obtained in the step 5 into the solution, ultrasonically stirring for 30min, taking out, cooling and drying;
step 7, weighing the dodecanoic acid, heating and melting the dodecanoic acid to a liquid state, wherein the mass ratio of the dodecanoic acid to the ceramsite in the step 6 is 1.5:1;
step 8, vacuumizing the ceramsite in the step 6, adding the liquid organic phase change material in the step 7 under the vacuum condition, stirring for 30min, and taking out the ceramsite;
step 9, coating a polymer composite film layer on the ceramsite taken out in the step 8, wherein the polymer composite film layer is composed of epoxy resin, a curing agent and iron powder, and the volume ratio of the epoxy resin to the curing agent to the iron powder is 12:12:1.
after the low-hydration-heat-high-heat-conductivity radiation-proof concrete prepared in the embodiment is cured for 28 days, the compressive strength is 52.3MPa
Example 2
The preparation method and the raw materials of the radiation-proof concrete with low hydration heat and high thermal conductivity provided by the embodiment are the same as those of the embodiment 1.
The difference lies in that the preparation method of the modified ceramsite comprises the following differences:
in the step 1, weighing the raw materials of the modified ceramsite: 5 parts of straw, 70 parts of iron ore tailing powder, 30 parts of clay and 10 parts of water.
Example 3
The preparation method and the raw materials of the radiation-proof concrete with low hydration heat and high thermal conductivity provided by the embodiment are the same as those of the embodiment 1.
The difference is that the preparation method of the modified ceramsite comprises the following differences:
the roasting temperature in the step 5 is 800 ℃, and the roasting time is 4 hours.
Example 4
The preparation method and the raw materials of the radiation-proof concrete with low hydration heat and high thermal conductivity provided by the embodiment are the same as those of the embodiment 1.
The difference is that the preparation method of the modified ceramsite comprises the following differences:
the roasting temperature in the step 5 is 1200 ℃, and the roasting time is 6 hours.
Example 5
The preparation method and the raw materials of the radiation-proof concrete with low hydration heat and high thermal conductivity provided by the embodiment are the same as those of the embodiment 1.
The difference lies in that the weight fractions of the components in the radiation-proof concrete with low hydration heat and high thermal conductivity are as follows: 410 parts of cement; 50 parts of fly ash; 30 parts of limonite powder; 750 parts of river sand; 970 parts of modified ceramsite.
Example 6
The preparation method and the raw materials of the radiation-proof concrete with low hydration heat and high thermal conductivity provided by the embodiment are the same as those of the embodiment 1.
The difference is that the preparation method of the modified ceramsite comprises the following differences:
in the step 4, according to the mass ratio of 2:1:1 grinding into particles with the particle diameters of 10-12mm, 13-16mm and 17-20mm respectively.
After the low-hydration-heat-high-heat-conductivity radiation-proof concrete prepared in the embodiment is cured for 28 days, the compressive strength is 47.3MPa.
Comparative example 1
The preparation method and raw materials of the radiation-proof concrete with low hydration heat and high thermal conductivity provided by the comparative example are the same as those in example 1.
The difference lies in that the preparation method of the modified ceramsite comprises the following differences:
and 9, coating a polymer composite film layer on the ceramsite in the step 8, wherein the polymer composite film layer is composed of epoxy resin and a curing agent, namely the raw material of the polymer composite film layer does not contain iron powder.
Comparative example 2
The preparation method and raw materials of the radiation-proof concrete with low hydration heat and high thermal conductivity provided by the comparative example are the same as those in example 1.
The difference is that the raw material of the anti-radiation concrete with low hydration heat and high thermal conductivity does not contain limonite powder.
Comparative example 3
The preparation method and raw materials of the radiation-proof concrete with low hydration heat and high thermal conductivity provided by the comparative example are the same as those in example 1.
The difference lies in that the preparation method of the modified ceramsite comprises the following differences:
step 1, weighing raw materials of modified ceramsite: 5-10 parts of plant fiber, 60-70 parts of iron ore tailing powder, 30-40 parts of clay and 10-25 parts of water, namely the raw material of the modified ceramsite does not contain the iron ore tailing powder.
Comparative example 4
The preparation method and raw materials of the radiation-proof concrete with low hydration heat and high thermal conductivity provided by the comparative example are the same as those in example 1.
The difference is that the preparation method of the modified ceramsite comprises the following differences:
step 1 is that the raw materials of the modified ceramsite replace plant fiber powder (straws) with starch, and step 2 is omitted.
Comparative example 5
The preparation method and raw materials of the radiation-proof concrete with low hydration heat and high thermal conductivity provided by the comparative example are the same as those in example 1.
The difference is that the preparation method of the modified ceramsite comprises the following differences:
step 6 is omitted, and the adsorption of ferrous glycinate in the pore channels of the modified ceramsite is not carried out.
Comparative example 6
The preparation method and raw materials of the radiation-proof concrete with low hydration heat and high thermal conductivity provided by the comparative example are the same as those in example 1.
The difference is that the modified ceramsite in the low-hydration-heat-high-heat-conductivity radiation-proof concrete raw material is replaced by the crushed stone, and the particle size of the crushed stone is the same as that of the ceramsite in the embodiment 1.
Experimental example: performance test of low-hydration-heat high-heat-conductivity radiation-proof concrete
1. Test of radiation protection Property
The low-hydration-heat-high-heat-conductivity radiation-proof concrete prepared in the examples 1 to 6 and the comparative examples 1 to 6 is put into a curing room for curing, after the specified curing time is reached, the concrete test block prepared by the experimental group is subjected to performance test according to relevant standard regulations and test methods in GB/T34008-2017 radiation-proof concrete, and the results are shown in Table 1.
TABLE 1 radiation protection performance test table
It can be seen from the above table that the modified ceramsite and the limonite powder play an important role in the radiation protection performance of the concrete, and then the iron element is added into the modified ceramsite to serve as a raw material to improve the protection capability of the concrete on gamma rays, and the hydrogen element is added into the modified ceramsite to improve the protection capability of the concrete on neutron rays.
2. Internal and external temperature difference test of concrete
The poured radiation-proof concrete with low hydration heat and high thermal conductivity is continuously detected within 7 days according to GB/T50108 'underground engineering waterproof technical regulation', the maximum temperature difference inside and outside the concrete and the maximum temperature inside the concrete are tested, and the result is shown in Table 2.
TABLE 2 temperature data table for radiation-proof concrete with low hydration heat and high thermal conductivity
| Maximum temperature difference | Highest temperature DEG C | |
| Example 1 | 18 | 45 |
| Example 2 | 19.5 | 45.8 |
| Example 3 | 18 | 45.3 |
| Example 4 | 20.5 | 47 |
| Example 5 | 19.8 | 45.5 |
| Example 6 | 18.2 | 45.5 |
| Comparative example 1 | 23 | 48 |
| Comparative example 2 | 23.5 | 50 |
| Comparative example 3 | 23.2 | 48.2 |
| Comparative example 4 | 21.5 | 46.8 |
| Comparative example 5 | 22 | 47 |
| Comparative example 6 | 28.5 | 52 |
As shown in the above table 2, the adsorption of the organic phase change material by the modified ceramsite has an important effect on reducing the hydration heat of the concrete, and the addition of the metal element into each component of the concrete is beneficial to the heat transfer.
The modified ceramsite through porous structure enables the organic phase change material to have better fluidity in a pore channel and is beneficial to the absorption of heat by the organic phase change material, the iron powder is added into the polymer composite film, so that the polymer composite film does not influence the transfer of hydration heat when encapsulating the modified ceramsite, and the ferrous glycinate in the pore channel can promote the transfer of heat.
Through the limonite powder in the concrete, the hydration heat that produces in the concrete curing process can be transferred to the external world fast on the one hand, and on the other hand setting of modified haydite also can absorb the inside heat of concrete to reach the inside and outside difference in temperature and the inside temperature that reduce the concrete, avoid the effect of concrete at early curing in-process fracture.
Claims (6)
1. The radiation-proof concrete with low hydration heat and high thermal conductivity is characterized by comprising the following components in parts by weight: 420 parts of cement, 60 parts of fly ash, 35 parts of limonite powder, 760 parts of river sand and 980 parts of modified ceramsite;
the modified ceramsite is prepared by the following method:
step 1, weighing the raw materials of the modified ceramsite: 5-10 parts of plant fiber, 60-70 parts of iron ore tailing powder, 30-40 parts of clay and 10-25 parts of water;
step 2, drying the plant fibers in the step 1 and grinding the dried plant fibers into powder;
step 3, uniformly stirring and mixing the clay, the iron ore tailing powder and the water in the step 1 and the plant fiber powder in the step 2 into a cluster, and drying at 80-120 ℃;
step 4, crushing the material mixed dough dried in the step 3 into particles with the particle size of 10-20 mm; in the step 4, the mass ratio of the components is 1:1:1 grinding into particles with the particle diameters of 10-12mm, 13-16mm and 17-20mm respectively;
step 5, roasting the material mixed particles obtained in the step 4 into ceramsite at 800-1200 ℃, and roasting for 4-6h;
step 6, weighing ferrous glycinate, dissolving the ferrous glycinate in water, heating to 80 ℃ to prepare a saturated aqueous solution of the ferrous glycinate, putting the ceramsite obtained in the step 5 into the solution, keeping the temperature of 80 ℃ constant, ultrasonically stirring for 30min, taking out, cooling and drying;
step 7, weighing an organic phase-change material at the temperature of 30-45 ℃, and heating the organic phase-change material to be in a liquid state, wherein the mass ratio of the organic phase-change material to the ceramsite in the step 6 is 1.5:1;
step 8, vacuumizing the ceramsite in the step 6 until the vacuum pressure is above 80KPa, adding the liquid organic phase-change material in the step 7, stirring for 30min, and taking out the ceramsite;
step 9, coating a polymer composite film layer on the ceramsite obtained in the step 8, wherein the polymer composite film layer is composed of epoxy resin, a curing agent and iron powder, and the volume ratio of the epoxy resin to the curing agent to the iron powder is 12:12:1.
2. the low-hydration-heat high-thermal-conductivity radiation-proof concrete according to claim 1, wherein the modified ceramsite raw material in the step 1 comprises, by weight, 10 parts of plant fibers, 60 parts of iron ore tailing powder, 40 parts of clay and 20 parts of water.
3. The low hydration heat high thermal conductivity radiation protective concrete according to claim 1, wherein in the step 5, the baking temperature is 1100 ℃ and the baking time is 5 hours.
4. The radiation-proof concrete with low hydration heat and high thermal conductivity of claim 1, wherein in the preparation method of the modified ceramsite, the organic phase-change material in the step 7 is dodecanoic acid.
5. The radiation-proof concrete with low hydration heat and high heat conductivity as claimed in claim 2, wherein the plant fiber in step 1 is straw.
6. The preparation method of the low hydration heat high thermal conductivity radiation protection concrete of claim 1, which is characterized by comprising the following steps:
mixing limonite powder, river sand and modified ceramsite, adding 1/2 of the total amount of water, stirring for 60s, adding cement, fly ash and the rest water, and stirring uniformly to obtain the low-hydration-heat high-heat-conductivity radiation-proof concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110948012.7A CN113666685B (en) | 2021-08-18 | 2021-08-18 | Low-hydration-heat high-heat-conductivity radiation-proof concrete and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110948012.7A CN113666685B (en) | 2021-08-18 | 2021-08-18 | Low-hydration-heat high-heat-conductivity radiation-proof concrete and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113666685A CN113666685A (en) | 2021-11-19 |
| CN113666685B true CN113666685B (en) | 2023-02-03 |
Family
ID=78543630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110948012.7A Active CN113666685B (en) | 2021-08-18 | 2021-08-18 | Low-hydration-heat high-heat-conductivity radiation-proof concrete and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113666685B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114349475B (en) * | 2022-03-21 | 2022-05-24 | 胜利油田方圆陶业有限公司 | Preparation method of core-shell type ceramsite fracturing propping agent for oil and gas collection |
| CN115321909A (en) * | 2022-08-12 | 2022-11-11 | 湖北合力久盛混凝土有限公司 | Radiation-proof concrete and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111170683A (en) * | 2019-11-08 | 2020-05-19 | 北京城建亚泰金砼混凝土有限公司 | Radiation-proof concrete and production process thereof |
| CN112010593A (en) * | 2020-08-25 | 2020-12-01 | 湖州上建混凝土有限公司 | Radiation-proof concrete and preparation method thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL1025910C2 (en) * | 2004-04-08 | 2005-10-11 | Kobato Polytechnologie B V | Polymer composition with heat accumulating phase transition materials, a process for preparing them, products and articles containing this composition and use thereof. |
| CN102815965B (en) * | 2012-08-30 | 2014-03-26 | 武汉钢铁(集团)公司 | Porous ceramsite made of low-silicon iron tailings and preparation method of porous ceramsite |
| CN104496544A (en) * | 2014-12-30 | 2015-04-08 | 深圳大学 | Phase change energy storage ceramsite and preparation method thereof |
| CN112897942A (en) * | 2021-04-20 | 2021-06-04 | 陕西沣东新城混凝土有限责任公司 | C35 concrete and preparation method thereof |
-
2021
- 2021-08-18 CN CN202110948012.7A patent/CN113666685B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111170683A (en) * | 2019-11-08 | 2020-05-19 | 北京城建亚泰金砼混凝土有限公司 | Radiation-proof concrete and production process thereof |
| CN112010593A (en) * | 2020-08-25 | 2020-12-01 | 湖州上建混凝土有限公司 | Radiation-proof concrete and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113666685A (en) | 2021-11-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113666685B (en) | Low-hydration-heat high-heat-conductivity radiation-proof concrete and preparation method thereof | |
| CN106588117B (en) | Radiation-proof functional aggregate prepared from electroplating sludge containing Cr and Zn | |
| Abo-El-Enein et al. | Physico-mechanical properties of high performance concrete using different aggregates in presence of silica fume | |
| CN102219459A (en) | Radiation shield concrete and preparation method thereof | |
| CN104926304B (en) | A kind of gadolinium oxide ceramics and preparation method thereof | |
| Zhenyu et al. | Immobilization of solidified ceramic forms with magnesium phosphate cement | |
| CN111170683A (en) | Radiation-proof concrete and production process thereof | |
| Chen et al. | Mechanism on activation of coal gangue admixture | |
| CN108793894B (en) | Barite radiation-proof concrete | |
| CN106847360A (en) | A kind of method that utilization granite solidifies radwaste | |
| CN109231933A (en) | A kind of radiation shield concrete and preparation method thereof | |
| CN111524632A (en) | Magnesium-based cement curing substrate and method for treating low-medium radioactive nuclear waste | |
| Liu et al. | The latest research progress of green building materials in lead and zinc tailings | |
| CN108059405B (en) | Nuclear power station containment concrete | |
| CN114956631B (en) | Radiation-proof functional aggregate and preparation method thereof | |
| CN114804770B (en) | Iron ore anti-radiation concrete and preparation method thereof | |
| CN113336460B (en) | Functional aggregate for radiation-proof concrete and preparation method thereof | |
| CN109748567A (en) | A kind of middle low-activity spent resin phosphor aluminate cement base curing substrate | |
| CN109574608A (en) | A kind of radiation shield concrete and preparation method thereof can be reduced secondary radiation | |
| US3993579A (en) | Method of encapsulating solid radioactive waste material for storage | |
| US3645916A (en) | Metallic mortars | |
| Wang et al. | Stabilization/solidification of radioactive borate waste via low-carbon limestone calcined clay cement (LC3) | |
| CN114436619B (en) | Magnesium phosphate-based neutron shielding cementing material with high boron carbide content | |
| CN108439836B (en) | Reconstructed chromium slag powder for anti-radiation mortar and concrete, and preparation and application thereof | |
| CN109503110B (en) | Medium-low radioactive nuclear waste incineration ash calcium strontium phosphate cement curing base material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |