CN105621987B - A kind of preparation method of high-temperature phase-change energy-storing concrete - Google Patents
A kind of preparation method of high-temperature phase-change energy-storing concrete Download PDFInfo
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- CN105621987B CN105621987B CN201510972433.8A CN201510972433A CN105621987B CN 105621987 B CN105621987 B CN 105621987B CN 201510972433 A CN201510972433 A CN 201510972433A CN 105621987 B CN105621987 B CN 105621987B
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- Prior art keywords
- aggregate
- phase
- preparation
- change energy
- accumulation
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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
-
- 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
-
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/2084—Thermal shock resistance
-
- 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
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
-
- 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)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a kind of preparation method of high-temperature phase-change energy-storing concrete, prepared by following steps：Phase transformation spherolite is well mixed with slag aggregate, accumulation aggregate is prepared；Cement, slag micro powder, graphite powder and water are well mixed, grouting material is obtained；Grouting material is uniformly sprayed above accumulation aggregate, negative pressure leaching, to grouting material full of accumulation aggregate, maintenance obtains high-temperature phase-change energy-storing concrete.High-temperature phase-change energy-storing concrete thermal conductivity, heat-resisting quantity prepared by the present invention are good, good endurance, not easy to crack.
Description
Technical field
The present invention relates to a kind of preparation method of high-temperature phase-change energy-storing concrete, belong to energy saving building material technical field.
Background technology
Phase-changing energy storage material is one of focus of the external using energy source of recent year and material science aspect developmental research.
Phase-change accumulation energy is also known as latent heat formula energy storage, is the material using the energy storage in the case of temperature-resistant of latent heat of phase change mode, and it is former
Reason carries out storing discharging heat due to absorbing/releasing energy when being the change or structure transformation that occur phase using phase-change material, special
Put and be：Storage density is big, storing discharging thermal process is that progress, the hot speed of storing discharging have controllability etc. under conditions of constant temperature.Upper
State in storing discharging thermal process, phase-change material is the medium for realizing phase-change thermal storage, its temperature be higher than transformation temperature when absorb heat so as to
Undergo phase transition i.e. thawing heat accumulation process；When temperature drop, less than transformation temperature when, it is solidification exothermic process to occur reverse phase transformation.Profit
With the effect of this accumulation of heat, the heat release of phase-change material, the temperature of surrounding environment can be adjusted, therefore, phase-changing energy storage material is being built
Building the fields such as heating, air-conditioning has wide prospect.
Phase-change accumulation energy can alleviate energy dissipation, be the effective way of reasonable energy utilization and mitigation environmental pollution, be also
Broad sense heat energy system optimized operation important means.It is expected to have into using the high-temperature phase-change energy-storing concrete prepared by the technology
This low, blowdown is low, performance is stable, build the advantage such as easy of safeguarding, but is due to that concrete is airwater mist cooling material, existing
Research phase-changing energy storage material is melted after mixed with porous particle, under vacuum or non-vacuum condition, make phase-changing energy storage material
Penetrate into porous particle, form phase-change accumulation energy aggregate, easily make concrete because inside is heated uneven and cause micro-crack to produce
It is raw, or even cracking, poor thermal conductivity, the serious military service durability limited under high temperature.
The content of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of preparation of simply and easily high-temperature phase-change energy-storing concrete
Method, high-temperature phase-change energy-storing concrete prepared by this method thermal conductivity, heat-resisting quantity be good, good endurance, not easy to crack.
The purpose of the present invention is achieved by the following technical solution：
A kind of preparation method of high-temperature phase-change energy-storing concrete, is prepared by following steps：
1）It is that 10-30% phase transformations spherolite is well mixed with 70-90% slag aggregates by percentage by weight, then under 2-4MPa
The 30-180s that pressurizes is molded, and obtains accumulation aggregate；
2）Cement 5-15%, slag micro powder 50-70%, graphite powder 5-15% and water 10-30% are mixed according to percentage by weight
Uniformly, grouting material is obtained；
3）Grouting material is uniformly sprayed above accumulation aggregate, taken out under 2-4MPa condition of negative pressure below accumulation aggregate
Filter, to grouting material full of accumulation aggregate, conserves 1-5h, obtains high-temperature phase-change energy-storing concrete.
Described, phase transformation spherolite is sodium nitrate spherolite, a diameter of 2-8mm.
Described, a diameter of 2-4cm of slag aggregate.
Described, the specific surface area of slag micro powder is 600-700m2/Kg。
Described, the condition of maintenance is 40-60 DEG C, relative humidity 60-95%.
Beneficial effects of the present invention：
（1）The present invention causes grouting material full of accumulation aggregate by the method for suction filtration, and slag micro powder and graphite are in high-temperature-phase
Become in energy-storing concrete and be evenly distributed, substantially improve the heat conduction uniformity of inside concrete, improve the work of concrete heat absorption heat release
Make ageing, be effectively prevented from it is internal heated it is uneven cause internal stress and cause cracking, and then influence the globality of concrete
Energy.
（2）It is of the invention by being pressurizeed and grouting material suction filtration to accumulation aggregate compared with conventional concrete batch mixing stirring technique,
The structural compactness of concrete is significantly improved, meltage of the sodium nitrate spherolite in water is reduced, the accumulation of heat energy of concrete is improved
Power.
（3）High-temperature phase-change energy-storing concrete thermal conductivity, heat-resisting quantity prepared by the present invention are good, good endurance, not easy to crack.
（4）The preparation method of the present invention is simple and convenient, and suitable large-scale promotion is used.
Embodiment
The slag aggregate and slag micro powder of the present invention is derived from Jinan steel mill, and main chemical compositions are Al2O3、CaO、
SiO2, MgO and Fe2O3。
Embodiment 1
A kind of preparation method of high-temperature phase-change energy-storing concrete, is prepared by following steps：
1）It is that 30% phase transformation spherolite is well mixed with 70% slag aggregate by percentage by weight, then pressurize 180s under 2MPa
Shaping, obtains accumulation aggregate；
2）Cement 5%, slag micro powder 70%, graphite powder 15% and water 10% are well mixed according to percentage by weight, must be in the milk
Material；
3）Grouting material is uniformly sprayed above accumulation aggregate, from suction filtration below accumulation aggregate under 2MPa condition of negative pressure,
To grouting material full of accumulation aggregate, 60 DEG C, conserve 5h under the conditions of relative humidity 60%, high-temperature phase-change energy-storing concrete is obtained.
The phase transformation spherolite is sodium nitrate spherolite, a diameter of 2mm.
A diameter of 4cm of the slag aggregate.
The specific surface area of the slag micro powder is 600m2/Kg。
According to GB/T50107-2010《Standard for inspection and assessment of strength of concrete》Measure 50-400 DEG C of heating and cooling circulation of experience
28 days compression strength loss rates of the present embodiment high-temperature phase-change energy-storing concrete are 8.3% after 50 times, and concrete has no crack.Adopt
The thermal conductivity factor that the present embodiment high-temperature phase-change energy-storing concrete is measured with concrete thermal conductivity factor instrument is 2.08W/mK.
Embodiment 2
A kind of preparation method of high-temperature phase-change energy-storing concrete, is prepared by following steps：
1）It is that 20% phase transformation spherolite is well mixed with 80% slag aggregate by percentage by weight, then pressurize 100s under 3MPa
Shaping, obtains accumulation aggregate；
2）Cement 10%, slag micro powder 60%, graphite powder 10% and water 20% are well mixed according to percentage by weight, must be in the milk
Material；
3）Grouting material is uniformly sprayed above accumulation aggregate, from suction filtration below accumulation aggregate under 3MPa condition of negative pressure,
To grouting material full of accumulation aggregate, 50 DEG C, conserve 3h under the conditions of relative humidity 75%, high-temperature phase-change energy-storing concrete is obtained.
The phase transformation spherolite is sodium nitrate spherolite, a diameter of 5mm.
A diameter of 3cm of the slag aggregate.
The specific surface area of the slag micro powder is 650m2/Kg。
According to GB/T50107-2010《Standard for inspection and assessment of strength of concrete》Measure 50-400 DEG C of heating and cooling circulation of experience
28 days compression strength loss rates of the present embodiment high-temperature phase-change energy-storing concrete are 12.8% after 50 times, and have no crack.Using coagulation
The thermal conductivity factor that native thermal conductivity factor instrument measures the present embodiment high-temperature phase-change energy-storing concrete is 1.65W/mK.
Embodiment 3
A kind of preparation method of high-temperature phase-change energy-storing concrete, is prepared by following steps：
1）It is that 10% phase transformation spherolite is well mixed with 90% slag aggregate by percentage by weight, then pressurize 30s under 4MPa
Shaping, obtains accumulation aggregate；
2）Cement 15%, slag micro powder 50%, graphite powder 5% and water 30% are well mixed according to percentage by weight, must be in the milk
Material；
3）Grouting material is uniformly sprayed above accumulation aggregate, from suction filtration below accumulation aggregate under 4MPa condition of negative pressure,
To grouting material full of accumulation aggregate, 40 DEG C, conserve 1h under the conditions of relative humidity 95%, high-temperature phase-change energy-storing concrete is obtained.
The phase transformation spherolite is sodium nitrate spherolite, a diameter of 8mm.
A diameter of 2cm of the slag aggregate.
The specific surface area of the slag micro powder is 700m2/Kg。
According to GB/T50107-2010《Standard for inspection and assessment of strength of concrete》Measure 50-400 DEG C of heating and cooling circulation of experience
28 days compression strength loss rates of the present embodiment high-temperature phase-change energy-storing concrete are 12.6% after 50 times, and have no crack.Using coagulation
The thermal conductivity factor that native thermal conductivity factor instrument measures the present embodiment high-temperature phase-change energy-storing concrete is 1.41W/mK.
Embodiment 4
A kind of preparation method of high-temperature phase-change energy-storing concrete, is prepared by following steps：
1）It is that 20% phase transformation spherolite is well mixed with 80% slag aggregate by percentage by weight, obtains accumulation aggregate；
2）Cement 10%, slag micro powder 60%, graphite powder 10% and water 20% are well mixed according to percentage by weight, must be in the milk
Material；
3）Accumulation aggregate and grouting material are well mixed, are molded, 50 DEG C, conserve 3h under the conditions of relative humidity 75%, height is obtained
Warm phase-change accumulation energy concrete.
The phase transformation spherolite is sodium nitrate spherolite, a diameter of 5mm.
A diameter of 3cm of the slag aggregate.
The specific surface area of the slag micro powder is 650m2/Kg。
According to GB/T50107-2010《Standard for inspection and assessment of strength of concrete》Measure 50-400 DEG C of heating and cooling circulation of experience
28 days compression strength loss rates of the present embodiment high-temperature phase-change energy-storing concrete are 31.7% after 50 times, and concrete appearance naked eyes can
The crack seen.Use concrete thermal conductivity factor instrument measure the thermal conductivity factor of the present embodiment high-temperature phase-change energy-storing concrete for
0.82W/mK。
Claims (5)
1. a kind of preparation method of high-temperature phase-change energy-storing concrete, it is characterised in that prepared by following steps：
1）It is that 10-30% phase transformations spherolite is well mixed with 70-90% slag aggregates by percentage by weight, is then pressurizeed under 2-4MPa
30-180s is molded, and obtains accumulation aggregate；
2）Cement 5-15%, slag micro powder 50-70%, graphite powder 5-15% and water 10-30% are well mixed according to percentage by weight,
Obtain grouting material；
3）Grouting material is uniformly sprayed above accumulation aggregate, from suction filtration below accumulation aggregate under 2-4MPa condition of negative pressure, extremely
Grouting material conserves 1-5h, obtains high-temperature phase-change energy-storing concrete full of accumulation aggregate.
2. preparation method according to claim 1, it is characterised in that the phase transformation spherolite is sodium nitrate spherolite, a diameter of
2-8mm。
3. preparation method according to claim 1, it is characterised in that a diameter of 2-4cm of the slag aggregate.
4. preparation method according to claim 1, it is characterised in that the specific surface area of the slag micro powder is 600-
700m2/Kg。
5. preparation method according to claim 1, it is characterised in that the condition of the maintenance is 40-60 DEG C, relative humidity
60-95%。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510972433.8A CN105621987B (en) | 2015-12-23 | 2015-12-23 | A kind of preparation method of high-temperature phase-change energy-storing concrete |
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|---|---|---|---|
| CN201510972433.8A CN105621987B (en) | 2015-12-23 | 2015-12-23 | A kind of preparation method of high-temperature phase-change energy-storing concrete |
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| Publication Number | Publication Date |
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| CN105621987A CN105621987A (en) | 2016-06-01 |
| CN105621987B true CN105621987B (en) | 2017-11-07 |
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| CN112209697A (en) * | 2020-10-28 | 2021-01-12 | 重庆理工大学 | Phase-change energy-storage geopolymer concrete and preparation method and application thereof |
| CN116120014A (en) * | 2023-02-14 | 2023-05-16 | 山东水总有限公司 | Dam danger-removing reinforcing material and reinforcing method |
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| CN101555115A (en) * | 2009-05-08 | 2009-10-14 | 东南大学 | Phase change energy saving building material |
| CN104609791B (en) * | 2015-01-27 | 2016-08-24 | 建筑材料工业技术监督研究中心 | Phase-change accumulation energy double limit homoiothermic mortar and preparation method thereof |
| CN105110731B (en) * | 2015-08-06 | 2017-03-01 | 济南大学 | A kind of high-temperature phase-change energy-storing concrete and preparation method thereof |
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