CN107473678A - The cermet concrete of resisting strong impact under superhigh temperature - Google Patents
The cermet concrete of resisting strong impact under superhigh temperature Download PDFInfo
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- CN107473678A CN107473678A CN201710880153.3A CN201710880153A CN107473678A CN 107473678 A CN107473678 A CN 107473678A CN 201710880153 A CN201710880153 A CN 201710880153A CN 107473678 A CN107473678 A CN 107473678A
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- cermet
- concrete
- strong impact
- impact under
- superhigh temperature
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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
- C04B28/06—Aluminous 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
- 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
-
- 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
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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 discloses a kind of cermet concrete of resisting strong impact under superhigh temperature, the 500kg of binder materials 400 is included in every cubic metre of cermet concrete, the 1150kg of cermet coarse aggregate 950, quartz sand or the 715kg of cermet fine aggregate 660, the 180kg of water 160, the 9kg of high performance water reducing agent of polyocarboxy acid 7, nano powder 0.5kg 2kg, high-temperature-resistant high fiber 3kg 10kg.Cermet concrete of the present invention mixes a large amount of nano silica fumes as mineral admixture, high performance water reducing agent of polyocarboxy acid and high-temperature-resistant high fiber, the internal structure of material after shaping using cermet as aggregate.Cermet concrete is in the great application prospect in the fields such as bridge structure, skyscraper, military protection, nuclear power engineering and aerospace engineering.
Description
Technical field
The invention belongs to civil engineering technical field of concrete, and in particular to a kind of to can be used for resisting strong impact under superhigh temperature
Cermet concrete.
Background technology
Concrete has been widely used in all kinds of building engineering fields as a kind of the most frequently used civil engineering material.
As urban architecture density is increasing, causes urban architecture fire risk and difficulty of putting out a fire to save life and property is increasing, with fire thing
Therefore take place frequently, therefore continuous collapse accident happens occasionally building.Meanwhile some special industrials related to chemical industry are due to operating not
When etc. reason trigger accident not only make building structure by blast and fire attacked, also can therefore and recurring structure it is continuous
Collapse.Under some extreme use conditions, concrete not only needs the external condition in face of superhigh temperature, while must endure as part
Possible thump load, this proposes acid test to concrete material performance.
Under ultra-high temperature condition（About 1300 degrees centigrades）, conventional concrete major cycle, it is embodied in：
（1）The dehydration of hydrated cementitious mineral, volume contraction are decomposed, and intensity significantly declines.（2）Aggregate by heat damage in concrete；
The coarse-fine aggregate of mixing concrete（Typically it is mostly cobble or rubble and river sand）Heat endurance is very poor, the mineral crystal coefficient of expansion
Difference, after certain temperature is reached, crystal transfer can occur aggregates for its crystal inside, cause volumetric expansion and cause to ftracture
Destroy.（3）The destruction at interface between Behavior of Hardened Cement Paste and aggregate；Behavior of Hardened Cement Paste produces larger contraction in heating process, and by Behavior of Hardened Cement Paste
The stone being wrapped in but is expanded in heating process, and its swell value increases with the rise of temperature, and this harmomegathus difference is drawn
Play the destruction of concrete.Under this high-temperature condition, conventional concrete shows phenomena such as cracking, scaling is even burst apart, this
When the high strain-rate effect caused by thump load concrete structure will be made to be caused inestimable by extremely serious destruction
Loss.
The content of the invention
It is an object of the invention to provide a kind of cermet concrete of thump under superhigh temperature resistant, at 1300 DEG C or so
Its intensity is C30-C80, slump 160mm-220mm, overcomes conventional concrete high temperature resistance ablation property difference and high temperature
Lower intensity declines the shortcomings that serious, can equally meet pumping requirements.
The present invention adopts the following technical scheme that realization：
A kind of cermet concrete of the resisting strong impact under superhigh temperature, gelling material is included in every cubic metre of cermet concrete
Expect 400-500kg, cermet coarse aggregate 950-1150kg, quartz sand（Or cermet fine aggregate）660-715kg, water 160-
180kg, high performance water reducing agent of polyocarboxy acid 7-9kg, nano powder 0.5kg-2kg, high-temperature-resistant high fiber 3kg-10kg.
The binder materials is the mixture of the aluminous cement that alumina content is 65% and bauxite, wherein bauxite
Dosage account for the 15%-25% of binder materials weight.
The alumina silica ratio of the bauxite is not less than 10, water-cement ratio 0.35-0.42.
The coarse aggregate is continuous grading, and particle diameter is 5-20mm spherical or irregular block cermet material, metal
The grading of ceramic coarse aggregate is selected according to national standard《Cobble and rubble for building》（GB/T14685-2011）Perform.
The cermet material is aluminium oxide ceramics, silicon nitride ceramics, boron nitride ceramics, boron carbide ceramics etc..
The modulus of fineness 2.26 of the fine aggregate, sand coarse aggregate ratio：0.36-0.40.
The nano powder includes CNT, graphene, nano metal powder, nano nonmetal powder, Nanoalloy
Powder or Nano compound etc..
The high-temperature-resistant high fiber includes organic high temperature-resistant fiber（PMIA, PPTA etc.）Or inorganic high-temperature resistant fiber
（Carbon fiber, ceramic fibre, basalt fibre, boron fibre etc.）.
During ready-mixed concrete, using stone enveloped with cement technique, that is, be firstly added binder materials, the water of half and two/
One water reducer stirs 60 seconds, then adds coarse aggregate and stirs 90 seconds；It is eventually adding fine aggregate, remaining water and water reducer stirring 90
Second.
Cermet concrete and the main difference of normal concrete are as follows：
（1）, aggregate difference：Cermet concrete is using cermet material as coarse aggregate.Cermet is a kind of tool
There are metal and the advanced high-temperature structural material of ceramic combination property, the machinery that can be born under the high temperature conditions either statically or dynamically is born
Lotus, there is high-melting-point, high elevated temperature strength and less high-temerature creep, resistance to thermal shock, anticorrosive, anti-oxidant and Stability Analysis of Structures etc.
Feature.
（2）, binder materials difference：The binder materials of cermet concrete is the calcium aluminate that alumina content is 65%
The mixture of cement and bauxite, gain in strength process are similar to Portland cement, but have higher later strength and
Air stability.It is used to improve the resistance to of concrete in addition, cermet concrete mixes proper amount of nano micro mist in binder materials
Hot property, under high temperature action in active mineral admixture, with hydrolysis product of cement secondary response occurs, generate hydrated calcium silicate
And drated calcium aluminate, effectively reduce the content that generation is dehydrated under high temperature.
（3）, using high performance water reducing agent of polyocarboxy acid：Under high temperature, concrete dehydration causes to be internally formed substantial amounts of pore structure
It is the major reason of concrete rapid degradation, cermet concrete uses high performance water reducing agent of polyocarboxy acid, can effectively reduce mixed
The water content of soil is coagulated, reduces Decrepitation Phenomena caused by Concrete At High Temperature loss of water.
（4）, using high-temperature-resistant high fiber, whether impact or high temperature are effective.
The beneficial effects of the present invention are：
（1）, cermet concrete material keep stronger in long-time superhigh temperature and the repeatedly cyclic process of high temperature-cooling
Burning corrosion resistance, ensure concrete surface it is intact, there is higher stability, can guarantee that concrete long-term safety military service.
（2）, not only compression strength is high for concrete, and has stronger shock resistance, can have under thump effect
Effect consumption impact energy, it is not easy to crack under percussion.
（3）, it, from different heat expansion coefficient and the cermet of modulus of elasticity, can be made according to different application scenarios
It is closer to the thermal coefficient of expansion and modulus of elasticity of cement matrix, effectively reduces the lower inside concrete of superhigh temperature thump effect
The generation of crackle, possibility is provided for the development of ultra high strength concrete.
（4）, cermet aggregate is by adding high-temperature-resistant high fiber（Such as carbon fiber ceramic fiber, boron fibre, glass fibers
Dimension）Concrete is set to keep stronger toughness in the case of no arrangement of reinforcement.
（5）, effectively reduce alkali-aggregate reaction, effectively reduce inside concrete expansion, will not be by during being on active service for a long time
The destruction of concrete is caused in the intensity decreases of concrete and cracking etc..
（6）, cermet concrete can use sprayed construction, be additional to reinforced concrete body surface as overcoat
Face, good high temperature resistant and shock resistance effect can be played.
In a word, as modern construction engineering structure is to greatly across, high-rise, heavy duty and particular surroundings（Such as nuclear facilities, space flight, army
Thing engineering etc.）Direction is developed, and normal concrete can not meet the needs of contemporary engineering construction development.Concrete is in engineering
Application, its Service Environment becoming increasingly complex, except can suffer from the effect of impact load or the effect of superhigh temperature, or even depositing
The situation of thump is born at high temperature, and this proposes higher requirement to the shock resistance under concrete high temperature.Metal is made pottery
Porcelain concrete mixes a large amount of nano silica fumes as mineral admixture, high performance water reducing agent of polyocarboxy acid using cermet as aggregate
With high-temperature-resistant high fiber, the internal structure of material after shaping.Cermet concrete is in bridge structure, skyscraper, military affairs
The great application prospects in field such as protection, nuclear power engineering and aerospace engineering.
Embodiment
In order that content of the present invention easily facilitates understanding, with reference to embodiment to skill of the present invention
Art scheme is described further, but the present invention is not limited only to this.
The cermet concrete of thump under a kind of superhigh temperature resistant, gelling is included in every cubic metre of cermet concrete
Material 400-500kg, cermet coarse aggregate 950-1150kg, quartz sand（Or cermet fine aggregate）660-715kg, water
160-180kg, high performance water reducing agent of polyocarboxy acid 7-9kg, nano powder 0.5kg-2kg, high-temperature-resistant high fiber 3kg-10kg.
Binder materials is the use of the mixture of the aluminous cement that alumina content is 65% and bauxite, wherein bauxite
Amount accounts for the 15%-25% of binder materials weight.The alumina silica ratio of bauxite is not less than 10, water-cement ratio 0.35-0.42.
Coarse aggregate is continuous grading, and particle diameter is 5-20mm spherical or irregular block cermet material, cermet
The grading of coarse aggregate is selected according to national standard《Cobble and rubble for building》（GB/T14685-2011）Perform.
Fine aggregate is that particle diameter is 0.5-3mm, sand coarse aggregate ratio：0.36-0.40.
Nano powder includes CNT, graphene, nano metal powder, nano nonmetal powder, nano-alloy powder
Or Nano compound etc..
High-temperature-resistant high fiber includes organic high temperature-resistant fiber（PMIA, PPTA etc.）Or inorganic high-temperature resistant fiber（Carbon is fine
Dimension, ceramic fibre, basalt fibre, boron fibre etc.）.
During ready-mixed concrete, using stone enveloped with cement technique, that is, be firstly added binder materials, the water of half and two/
One water reducer stirs 60 seconds, then adds coarse aggregate and stirs 90 seconds；It is eventually adding fine aggregate, remaining water and water reducer stirring 90
Second.
Embodiment 1
Binder materials 500kg is included in every cubic metre of cermet concrete（Wherein cement 380kg, bauxite 120kg）, metal
Ceramic coarse aggregate 950kg, quartzy sand fine aggregate 715kg, water 180kg, high performance water reducing agent of polyocarboxy acid 7kg, CNT
0.5kg, basalt fibre 8kg.
Prepared using stone enveloped with cement technique, the slump of gained cermet concrete is 205mm, cube resistance to compression in 28 days
Intensity is 53.7MPa.
Embodiment 2
Binder materials 500kg is included in every cubic metre of cermet concrete（Wherein cement 375kg, bauxite 125kg）, metal
Ceramic coarse aggregate 1050kg, quartzy sand fine aggregate 685kg, water 160kg, high performance water reducing agent of polyocarboxy acid 8.5kg, graphene
0.5kg, ceramic fibre 6kg.
Prepared using stone enveloped with cement technique, the slump of gained cermet concrete is 185mm, cube resistance to compression in 28 days
Intensity is 67.1MPa.
Embodiment 3
Binder materials 500kg is included in every cubic metre of cermet concrete（Wherein cement 420kg, bauxite 80kg）, metal
Ceramic coarse aggregate 1150kg, quartzy sand fine aggregate 650kg, water 175kg, high performance water reducing agent of polyocarboxy acid 5.5kg, nano-zirconium carbide
1.5kg, carbon fiber 6kg.
Prepared using stone enveloped with cement technique, the slump of gained cermet concrete is 200mm, cube resistance to compression in 28 days
Intensity is 56.3MPa.
Embodiment 4
Binder materials 500kg is included in every cubic metre of cermet concrete（Wherein cement 400kg, bauxite 100kg）, metal
Ceramic coarse aggregate 1000kg, quartzy sand fine aggregate 700kg, water 175kg, high performance water reducing agent of polyocarboxy acid 6.3kg, nanometer titanium dioxide
Silicon 1kg, boron fibre 5kg.
Prepared using stone enveloped with cement technique, the slump of gained cermet concrete is 195mm, cube resistance to compression in 28 days
Intensity is 58.8MPa.
Performance test is carried out to cermet concrete prepared by embodiment 1,2,3,4, as a result such as table 1 below：
Table 1
Compression strength and the bigger explanation elastic modulus of concrete ability of tensile splitting strength are stronger, the bigger explanation agent on crack resistance of concrete of heat resistance
High temperature capabilities are stronger, therefore as shown in Table 1, cermet concrete provided by the invention has excellent shock resistance and resisted
High-temperature behavior.This is due in preparation process, between cement, bauxite, cermet, quartz sand, silica and fiber
Acted synergistically so that concrete has excellent shock resistance and high temperature resistant property.
The specific embodiment of the present invention is these are only, but is not limited thereto.It is any to be solved substantially based on the present invention
Identical technical problem, or essentially identical technique effect is realized, made ground simple change, equivalent substitution or modification etc.,
Belong in protection scope of the present invention.
Claims (10)
- A kind of 1. cermet concrete of resisting strong impact under superhigh temperature, it is characterised in that：Every cubic metre of cermet concrete In include binder materials 400-500kg, cermet coarse aggregate 950-1150kg, quartz sand or cermet fine aggregate 660- 715kg, water 160-180kg, high performance water reducing agent of polyocarboxy acid 7-9kg, nano powder 0.5kg-2kg, high-temperature-resistant high fiber 3kg-10kg。
- 2. the cermet concrete of resisting strong impact under superhigh temperature according to claim 1, it is characterised in that：The gelling Material is the mixture of the aluminous cement that alumina content is 65% and bauxite, and the amount of wherein bauxite accounts for binder materials weight The 15%-25% of amount.
- 3. the cermet concrete of resisting strong impact under superhigh temperature according to claim 2, it is characterised in that：The aluminium alum The alumina silica ratio of soil is not less than 10, water-cement ratio 0.35-0.42.
- 4. the cermet concrete of resisting strong impact under superhigh temperature according to claim 1, it is characterised in that：The metal Ceramic coarse aggregate is continuous grading, and particle diameter is 5-20mm spherical or irregular block cermet material.
- 5. the cermet concrete of resisting strong impact under superhigh temperature according to claim 4, it is characterised in that：The metal Ceramic material is aluminium oxide ceramics, silicon nitride ceramics, boron nitride ceramics, boron carbide ceramics.
- 6. the cermet concrete of resisting strong impact under superhigh temperature according to claim 1, it is characterised in that：The quartz The modulus of fineness of sand or cermet fine aggregate is 2.26, sand coarse aggregate ratio：0.36-0.40.
- 7. the cermet concrete of resisting strong impact under superhigh temperature according to claim 1, it is characterised in that：The nanometer Micro mist includes CNT, graphene, nano metal powder, nano nonmetal powder, nano-alloy powder or Nano compound.
- 8. the cermet concrete of resisting strong impact under superhigh temperature according to claim 1, it is characterised in that：The resistance to height Warm high-intensity fiber includes organic high temperature-resistant fiber or inorganic high-temperature resistant fiber.
- 9. the cermet concrete of resisting strong impact under superhigh temperature according to claim 8, it is characterised in that：It is described organic High-temperature fibre is PMIA or PPTA；The inorganic high-temperature resistant fiber is carbon fiber, ceramic fibre, basalt fibre or boron Fiber.
- 10. the cermet concrete of resisting strong impact under superhigh temperature according to claim 1, it is characterised in that：Using net Wrapped stone craft is starched, that is, is firstly added binder materials, the water of half and half water reducer and stirs 60 seconds, then add thick Aggregate stirs 90 seconds；Fine aggregate, remaining water and water reducer is eventually adding to stir 90 seconds.
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| CN201710880153.3A CN107473678B (en) | 2017-09-26 | 2017-09-26 | Metal ceramic concrete with strong impact resistance at ultrahigh temperature |
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| CN201710880153.3A CN107473678B (en) | 2017-09-26 | 2017-09-26 | Metal ceramic concrete with strong impact resistance at ultrahigh temperature |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108046703A (en) * | 2017-12-21 | 2018-05-18 | 广东基业长青节能环保实业有限公司 | A kind of grinding ecological environment-friendly type composite concrete abrasive body and preparation method thereof |
| CN108863409A (en) * | 2018-06-12 | 2018-11-23 | 江苏振栋精密材料科技有限公司 | The heat-resisting material of carrying roller in a kind of furnace |
| CN108910844A (en) * | 2018-09-29 | 2018-11-30 | 福建江夏学院 | A kind of modified boron nitride nanometer tube material and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07126058A (en) * | 1993-10-29 | 1995-05-16 | Taisei Corp | High-strength, heat-resistant concrete |
| CN103910531A (en) * | 2014-03-26 | 2014-07-09 | 赵云 | Refractory concrete |
| CN107098657A (en) * | 2017-06-07 | 2017-08-29 | 南京理工大学 | With enhanced functionally gradient cement-base composite material of nano material and preparation method thereof |
-
2017
- 2017-09-26 CN CN201710880153.3A patent/CN107473678B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07126058A (en) * | 1993-10-29 | 1995-05-16 | Taisei Corp | High-strength, heat-resistant concrete |
| CN103910531A (en) * | 2014-03-26 | 2014-07-09 | 赵云 | Refractory concrete |
| CN107098657A (en) * | 2017-06-07 | 2017-08-29 | 南京理工大学 | With enhanced functionally gradient cement-base composite material of nano material and preparation method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108046703A (en) * | 2017-12-21 | 2018-05-18 | 广东基业长青节能环保实业有限公司 | A kind of grinding ecological environment-friendly type composite concrete abrasive body and preparation method thereof |
| CN108046703B (en) * | 2017-12-21 | 2020-06-23 | 广东基业长青节能环保实业有限公司 | Ecological environment-friendly composite concrete grinding body for grinding and preparation method thereof |
| CN108863409A (en) * | 2018-06-12 | 2018-11-23 | 江苏振栋精密材料科技有限公司 | The heat-resisting material of carrying roller in a kind of furnace |
| CN108910844A (en) * | 2018-09-29 | 2018-11-30 | 福建江夏学院 | A kind of modified boron nitride nanometer tube material and preparation method thereof |
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| CN107473678B (en) | 2020-01-17 |
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