CN109384428A - Misfire concrete and preparation method thereof - Google Patents
Misfire concrete and preparation method thereof Download PDFInfo
- Publication number
- CN109384428A CN109384428A CN201710672774.2A CN201710672774A CN109384428A CN 109384428 A CN109384428 A CN 109384428A CN 201710672774 A CN201710672774 A CN 201710672774A CN 109384428 A CN109384428 A CN 109384428A
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- parts
- misfiring
- graphite powder
- concrete
- mixture
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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
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/022—Carbon
- C04B14/024—Graphite
-
- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/023—Chemical 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/10—Coating or impregnating
- C04B20/1055—Coating or impregnating with inorganic materials
- C04B20/1062—Metals
-
- 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
Abstract
Misfire concrete the present invention relates to one kind, according to parts by weight, raw material includes: 256~266 parts of portland cement, 85~95 parts of flyash, 770~800 parts of fine aggregate sand of misfiring, 850~920 parts of coarse aggregate stone of misfiring, 11~15 parts of graphite powder, 36~48 parts of HR, 36~55 parts of MOH, 34~38 parts of copper sulphate, 178~232 parts of reducing agent, 3~15 parts of surfactant, 6~18 parts of compound complex agent, 9~21 parts of stabilizer, 3.6~4.8 parts of polycarboxylate water-reducer, 320~360 parts of water.This kind misfires concrete under the premise of proof strength, has superior misfire performance and electric conductivity.
Description
Technical field
The present invention relates to, with the concrete of fire protecting performance, misfire more specifically, it is related to one kind in building field
Concrete and preparation method thereof.
Background technique
With the development of modern economy, in some military project manufactures, liquefied petroleum-gas station, Gas Production factory, oiling library, petrol station
There is special fire-fighting requirement of explosion proof in the regions such as harbour, textile mills, printing house and other inflammable and explosive engineering, warehouses, in order to protect
Card safety in production, therefore the requirement to earth material is very tight, has to have misfiring property.
So-called misfiring property refers to when friction, impact or scouring abrasion etc. occur for the hard object such as material therefor and metal or stone
When mechanism, flashing or Mars do not cause combustibles to cause fiery or explosion danger.Generally the reason of ignition, includes
Two aspects, mechanical shock and friction generate static focus.When spark reaches certain energy, and when external condition has,
Just cause the disaster of burning, explosion.So necessarily requiring ground that there is misfiring property just can guarantee safety.
Concrete of misfiring is a kind of functional concrete for being amenable to impact without spark, when metal or hard stone
When the mechanisms such as friction impact occur for the objects such as block and such concrete, not flashing or Mars, thus combustible material
It is not easy to cause the danger exploded in fire, is chiefly used in oil depot, chemical plant etc. and forbids kindling material or the building with certain fire protection requirement.
Currently, the conducting powder for concrete of misfiring generallys use graphite powder, but the partial size of graphite powder is smaller, does not allow
It is uniformly mixed easily in concrete system, is easy to reunite in concrete system, cause to be prepared misfires concrete not
Ignition quality is poor.
Summary of the invention
Misfire concrete the purpose of the present invention is to provide one kind, the concrete in use, appropriate increase stone
The partial size of ink powder, graphite can uniformly mix in cement mortar, under the premise of proof strength, have superior misfiring property
Energy.
Above-mentioned purpose of the invention has the technical scheme that one kind is misfired concrete, by weight
Number meter, raw material include 256~266 parts of portland cement, 85~95 parts of flyash, fine aggregate sand 770~800 of misfiring
Part, 850~920 parts of coarse aggregate stone of misfiring, 11~15 parts of graphite powder, 36~48 parts of HR, 36~55 parts of MOH, copper sulphate 34
~38 parts, it is 178~232 parts of reducing agent, 3~15 parts of surfactant, 6~18 parts of compound complex agent, 9~21 parts of stabilizer, poly-
3.6~4.8 parts of carboxylic acid water reducer, 320~360 parts of water；It is 15-25mm continuous grading that the coarse aggregate stone of misfiring, which is partial size,
Lime stone, marble, dolomite mixture, it is described misfire fine aggregate what be lime stone matter that fineness modulus is 2.5-3.5
The mixture of sand, dolomite matter sand.
By using above-mentioned technical proposal, graphite powder surface has the soapy feeling of phat fat, oleophilic drainage, first with alkali
Solution removes the dirt on graphite powder surface, after the removal of the dirt on graphite powder surface, through peracid solutions by the surface of graphite powder
Oxidation processes are carried out, have grafted the groups such as-OH ,-COOH ,=CO on the graphite powder surface after peracid solutions aoxidize.Lead to later
The reduction for crossing reducing agent restores the copper ion of copper sulphate in the surface of graphite powder, and copper ion is in the mistake for being plated on graphite powder
Cheng Zhong controls reaction rate by surfactant, compound complex agent, stabilizer, copper ion is made uniformly to be plated on graphite powder surface,
To increase the partial size of graphite powder, graphite powder is more easier uniformly to mix in concrete system.Meanwhile graphite powder itself has
There is good electric conductivity, the layers of copper for being attached to graphite powder surface increases the electric conductivity of graphite powder, the coagulation being prepared
Soil has excellent electric conductivity.Partial size is the coarse aggregate of lime stone, marble, the dolomite composition of 15-25mm continuous grading,
Fineness modulus is the fine aggregate of the lime stone matter sand of 2.5-3.5, dolomite matter sand composition, plays in concrete system and does not send out
The effect of fiery skeleton, it is thick, fine aggregate to be used cooperatively, stress can be transmitted, inhibits to shrink, prevents from cracking.
Preferably, the conducting powder is graphite powder, and the graphite powder is grey black, and resistivity is 11 × 10-3Ω cm, it is resistance to
Hot is 470 DEG C, and average particle size is 1 μm, density 2.2g/cm3, apparent density 16g/100cm3, fixing carbon content is
99.99%, oil absorption 50g/100g, water content 0.3%, ash 0.01%, the suspension pH value of aqueous solution are 6.0.
By using above-mentioned technical proposal, graphite powder has chemical resistance, resistance to as a kind of functional conductive filler
The advantages that sour, alkaline-resisting, fast light, organic solvent-resistant, graphite dispersion is made an addition in concrete system, the electric conductivity of concrete is increased
Energy.When generating spark because of shock etc., the electrostatic of generation and spark are led using the conducting function of inside concrete graphite powder
Enter underground or concentrate and carry out conductive processing, reduce the occurrence probability of accident, improves the safety in particular surroundings.
Preferably, the granularity of the graphite powder is 300-350 mesh.
By using above-mentioned technical proposal, when the granularity of graphite powder is in 300-350 mesh, graphite powder can be uniformly dispersed
In concrete system, the electric conductivity for the concrete of misfiring being prepared is preferable.
Preferably, the reducing agent is one of formaldehyde, acetaldehyde, boron hydride, sodium hypophosphite or a variety of.
By using above-mentioned technical proposal, restored by the reducing agent of formaldehyde, acetaldehyde, boron hydride, sodium hypophosphite composition
The effect of copper sulphate is good.
Preferably, the surfactant is the mixing of dodecyl sodium sulfate, neopelex, sodium phosphate
Object.
By using above-mentioned technical proposal, after dodecyl sodium sulfate, neopelex, sodium phosphate are mixed,
It is configured to aqueous solution, graphite powder is added in the mixed liquor of surfactant, the surface of graphite powder is pre-processed.By table
Treated that graphite is blended in surfactant for face activating agent, collects the not processed graphite powder floated on liquid level.12
Sodium alkyl sulfonate and neopelex have excellent infiltration, wettability, after dodecyl sodium sulfate is handled
Graphite powder surface be attached with-SO3H, the while-PO being attached on sodium phosphate4H。
Preferably, the compound complex agent is the mixture of sodium tartrate, disodium ethylene diamine tetraacetate, triethanolamine.
It is prepared after mixing sodium tartrate, disodium ethylene diamine tetraacetate, triethanolamine by using above-mentioned technical proposal
At aqueous solution.Graphite powder mixed solution after pretreatment is finished is added in compound complex agent.The compound complex agent system
Have the characteristics that good stability, long service life, operation temperature are wide, at low cost.Not only guarantee the long-time stability of plating solution, but also
It can also make copper deposition velocity with higher.
Preferably, the stabilizer is ferrous hydrofining, α, α '-bipyridyl, 4,4 '-dimethyl -2, in 2 '-bipyridyls
It is one or more.
By using above-mentioned technical proposal, in the reduction process of copper sulphate, stabilizer reduction reaction, which is stablized, to be carried out, and makes copper
Layer is equably attached to the surface of graphite powder.
Preferably, M is one or both of sodium element or potassium element in the MOH.
By using above-mentioned technical proposal, sodium hydroxide solution has stronger with the aqueous slkali that potassium hydroxide solution forms
Alkalinity can effectively remove the dirt on graphite powder surface.
Preferably, R is NO in the HR3-And Cl-。
By using above-mentioned technical proposal, the acid solution of nitric acid solution and hydrochloric acid solution composition have it is stronger acid and
Oxidisability, acid solution carries out oxidation processes in and while the alkaline matter on graphite powder surface, by graphite powder surface, through peroxide
Change and has grafted the groups such as-OH ,-COOH ,=CO on treated graphite powder surface, the progress for facilitating sequential reduction to react.
Another object of the present invention is to provide the preparation methods of concrete described above of misfiring.
Above-mentioned purpose of the invention technical scheme is that, a kind of preparation side for concrete of misfiring
Method, comprising the following steps:
S1: taking graphite powder, is utilized respectively HR, MOH and is modified to graphite powder surface, obtains mixture；
S2: mixture, copper sulphate, reducing agent, surfactant, compound complex agent, the stabilizer for taking S1 to obtain, to graphite powder table
Face carries out copper plate, obtains mixture；
S3: fine aggregate sand of misfiring, coarse aggregate stone of misfiring is taken to be added in blender and be stirred, mixing time 30s is obtained
Mixture；
S4: the mixture for taking portland cement, flyash, S2 to obtain is added in mixture obtained in S3 and is stirred, and stirs
Time is 90s, obtains mixture；
S5: taking polycarboxylate water-reducer to be added in the mixture that S4 is obtained, and stirs 45s, discharges after stirring, obtain finished product
Misfire concrete.
In conclusion the invention has the following advantages: misfiring the early period of concrete in synthesis, to graphite powder progress
Surface treatment forms layers of copper in the surface reduction of graphite powder later, and the layers of copper for being attached to graphite powder surface is increasing graphite powder
While diameter, increase the electric conductivity of concrete, the concrete being prepared has good performance of misfiring.
Specific embodiment
All substances involved in the embodiment of the present invention are commercially available.
The specification of used sample is as shown in table 1 in each embodiment.
The specification of used sample in the following embodiment of table 1
Raw material proportioning used in each embodiment is as shown in table 2.
Constituent content in each embodiment of table 2
Concrete of misfiring in the above various embodiments the preparation method is as follows:
S1: taking graphite powder, is utilized respectively HR, MOH and is modified to graphite powder surface, obtains mixture；
S2: mixture, copper sulphate, reducing agent, surfactant, compound complex agent, the stabilizer for taking S1 to obtain, to graphite powder table
Face carries out copper plate, obtains mixture；
S3: fine aggregate sand of misfiring, coarse aggregate stone of misfiring is taken to be added in blender and be stirred, mixing time 30s is obtained
Mixture；
S4: the mixture for taking portland cement, flyash, S2 to obtain is added in mixture obtained in S3 and is stirred, and stirs
Time is 90s, obtains mixture；
S5: taking polycarboxylate water-reducer to be added in the mixture that S4 is obtained, and stirs 45s, discharges after stirring, obtain finished product
Misfire concrete.
The evaluation index and detection method used by concrete of misfiring of the above various embodiments preparation are as follows:
Compression strength: according to the specification detection concrete standard test block in GB/T 50010 " Code for design of concrete structures " the
The compression strength with 100% fraction measured at 7 days, the 14th day, the 28th day.
Misfire performance: the room of test is complete darkness, to be easy to see spark in test.Using grinding wheel come into
Row, the grinding wheel diameter of test are 150mm, when test its revolving speed should be 800r/min, 1000r/min, 1200r/min,
1500r/min, and the ability for separating spark is checked in darkroom.The concrete test block being fabricated to nothing in performance detection of misfiring
Any moment spark, performance detection of misfiring are qualified.
Resistivity: the resistivity of concrete resistivity tester measurement concrete standard test block is utilized.
The performance indicator of the above various embodiments is as shown in Table 3 and Table 4.
The performance test results of the concrete of misfiring of each embodiment of table 3 preparation
| The performance test results | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Embodiment 6 | Embodiment 7 |
| 7th day compression strength/MPa | 32.3 | 31.8 | 31.4 | 32.2 | 31.7 | 31.0 | 32.1 |
| 14th day compression strength/MPa | 41.0 | 40.6 | 40.3 | 40.9 | 40.4 | 39.9 | 40.7 |
| 28th day compression strength/MPa | 44.2 | 43.1 | 41.8 | 43.9 | 42.4 | 40.7 | 43.5 |
| Resistivity/Ω cm | 3.5 | 3.9 | 4.2 | 4.9 | 3.8 | 4.8 | 4.3 |
The performance test results of misfiring of the concrete of misfiring of each embodiment of table 4 preparation
From, as can be seen that the concrete of misfiring in the present invention is by compression strength performance test, compression strength reaches in above-mentioned table
To the use standard of C30, and respectively by the pressure and grinding wheel speed of 10N, 15N, 20N, 30N in 600-1000r/min
Under conditions of, the test result for the concrete being prepared is to misfire, and meets the job specfication requirement for concrete of misfiring, together
When, the concrete of misfiring being prepared has good conductive property.
Raw material proportioning used in each comparative example is as shown in table 5.
Constituent content in each comparative example of table 5
The preparation method and embodiment 1 of each comparative example are consistent.
The performance indicator of above each comparative example is as shown in table 6 and table 7.
The performance test results of the concrete of each comparative example of table 6 preparation
| The performance test results | Comparative example 1 | Comparative example 2 | Comparative example 3 | Comparative example 4 | Comparative example 5 |
| 7th day compression strength/MPa | 27.5 | 27.9 | 28.2 | 28.3 | 28.6 |
| 14th day compression strength/MPa | 36.4 | 36.8 | 36.9 | 37.1 | 37.2 |
| 28th day compression strength/MPa | 37.2 | 38.3 | 38.9 | 39.6 | 40.0 |
| Resistivity/Ω cm | 5.6 | 14.5 | 16.4 | 6.9 | 6.1 |
The performance test results of misfiring of the concrete of each comparative example of table 7 preparation
As can be seen from the above table, the partial size of graphite powder is down to 100 mesh in comparative example 1, since graphite powder is in concrete system
Mixing is more difficult, and the partial size of graphite powder reduces, and causes graphite powder to be more difficult to be uniformly mixed in concrete system, graphite powder cannot
It is uniformly distributed in concrete system, leads to the concrete electric conductivity being prepared reduction.
It is added without copper sulphate in comparative example 2, copper ion cannot be provided for reaction system, graphite powder surface cannot adhere to copper
The electric conductivity of layer, the coagulation being prepared reduces；It is added without reducing agent in comparative example 3, although providing copper in reaction system
Ion, but copper ion cannot be reduced, the electric conductivity for the coagulation being prepared reduces.
Stabilizer is added without in comparative example 4, graphite powder reacts unstable, layers of copper cannot be equably during copper-plated
It is attached to the surface of graphite powder, the electric conductivity for the coagulation being prepared reduces；Surfactant, stone are added without in comparative example 5
The surface of ink powder can not be pre-processed, and the difficulty for adhering to layers of copper later increases, and the electric conductivity for the coagulation being prepared reduces.
This specific embodiment is only explanation of the invention, is not limitation of the present invention, those skilled in the art
Member can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as at this
All by the protection of Patent Law in the scope of the claims of invention.
Claims (10)
- The concrete 1. one kind is misfired, characterized in that according to parts by weight, raw material include: 256~266 parts of portland cement, 85~95 parts of flyash, 770~800 parts of fine aggregate sand of misfiring, misfire 850~920 parts of coarse aggregate stone, graphite powder 11~15 Part, 36~48 parts of HR, 36~55 parts of MOH, 34~38 parts of copper sulphate, 178~232 parts of reducing agent, surfactant 3~15 Part, 6~18 parts of compound complex agent, 9~21 parts of stabilizer, 3.6~4.8 parts of polycarboxylate water-reducer, 320~360 parts of water；The coarse aggregate stone of misfiring is the lime stone, marble that partial size is 15-25mm continuous grading, the mixture of dolomite, It is described misfire fine aggregate what be fineness modulus be 2.5-3.5 lime stone matter sand, dolomite matter sand mixture.
- 2. concrete according to claim 1 of misfiring, characterized in that the conducting powder is graphite powder, the graphite powder For grey black, resistivity is 11 × 10-3Ω cm, heat resistance are 470 DEG C, and average particle size is 1 μm, density 2.2g/cm3, table Sight density is 16g/100cm3, fixed carbon content is 99.99%, oil absorption 50g/100g, water content 0.3%, and ash is 0.01%, the suspension pH value of aqueous solution is 6.0.
- 3. concrete according to claim 2 of misfiring, characterized in that the granularity of the graphite powder is 300-350 mesh.
- 4. concrete according to claim 1 of misfiring, characterized in that the reducing agent is formaldehyde, acetaldehyde, hydroboration One of object, sodium hypophosphite are a variety of.
- 5. concrete according to claim 4 of misfiring, characterized in that the surfactant is dodecyl sodium sulfonate Sodium, neopelex, sodium phosphate mixture.
- 6. concrete according to claim 1 of misfiring, characterized in that the compound complex agent is sodium tartrate, second two The mixture of amine tetraacethyl disodium, triethanolamine.
- 7. concrete according to claim 1 of misfiring, characterized in that the stabilizer is ferrous hydrofining, α, α '-connection One of pyridine, 4,4 '-dimethyl -2,2 '-bipyridyl are a variety of.
- 8. concrete according to claim 1 of misfiring, characterized in that M is in sodium element or potassium element in the MOH It is one or two kinds of.
- 9. concrete according to claim 1 of misfiring, characterized in that R is NO in the HR3-And Cl-。
- 10. a kind of method for preparing concrete of misfiring as described in claim 1, characterized in that the following steps are included:S1: taking graphite powder, is utilized respectively HR, MOH and is modified to graphite powder surface, obtains mixture；S2: mixture, copper sulphate, reducing agent, surfactant, compound complex agent, the stabilizer for taking S1 to obtain, to graphite powder table Face carries out copper plate, obtains mixture；S3: fine aggregate sand of misfiring, coarse aggregate stone of misfiring is taken to be added in blender and be stirred, mixing time 30s is obtained Mixture；S4: the mixture for taking portland cement, flyash, S2 to obtain is added in mixture obtained in S3 and is stirred, and stirs Time is 90s, obtains mixture；S5: taking polycarboxylate water-reducer to be added in the mixture that S4 is obtained, and stirs 45s, discharges after stirring, obtain finished product Misfire concrete.
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| CN101230456A (en) * | 2007-11-01 | 2008-07-30 | 株洲文辉新材电碳厂 | Copper-plating graphite composite material and preparation method thereof |
| KR100963907B1 (en) * | 2009-07-21 | 2010-06-17 | 에스이엠 주식회사 | Foam feeding system of lightweight cement and gypsum which can control to setting speed |
| CN103469182A (en) * | 2013-08-30 | 2013-12-25 | 西北工业大学 | Palladium-free chemical copper-plating method on graphite nanosheet surface |
| CN104593757A (en) * | 2013-10-31 | 2015-05-06 | 青岛泰浩达碳材料有限公司 | Preparation method of plating solution for copper plating on graphite powder surface |
| CN106747013A (en) * | 2016-12-30 | 2017-05-31 | 北京太平洋水泥制品有限公司 | Misfire concrete and preparation method thereof |
| CN107082602A (en) * | 2017-04-13 | 2017-08-22 | 天津金隅混凝土有限公司 | Misfire concrete and preparation method thereof |
-
2017
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| CN101230456A (en) * | 2007-11-01 | 2008-07-30 | 株洲文辉新材电碳厂 | Copper-plating graphite composite material and preparation method thereof |
| KR100963907B1 (en) * | 2009-07-21 | 2010-06-17 | 에스이엠 주식회사 | Foam feeding system of lightweight cement and gypsum which can control to setting speed |
| CN103469182A (en) * | 2013-08-30 | 2013-12-25 | 西北工业大学 | Palladium-free chemical copper-plating method on graphite nanosheet surface |
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