CN109650827A - A kind of high temperature resistant Hearth Furnace concrete dry material spray - Google Patents
A kind of high temperature resistant Hearth Furnace concrete dry material spray Download PDFInfo
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- CN109650827A CN109650827A CN201910000236.8A CN201910000236A CN109650827A CN 109650827 A CN109650827 A CN 109650827A CN 201910000236 A CN201910000236 A CN 201910000236A CN 109650827 A CN109650827 A CN 109650827A
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- concrete
- high temperature
- temperature resistant
- hearth furnace
- dry material
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Classifications
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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
- C04B2111/00034—Physico-chemical characteristics of the mixtures
- C04B2111/00146—Sprayable or pumpable mixtures
- C04B2111/00155—Sprayable, i.e. concrete-like, materials able to be shaped by spraying instead of by casting, e.g. gunite
-
- 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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00974—Uses not provided for elsewhere in C04B2111/00 for pyrotechnic applications, e.g. blasting
-
- 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
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
-
- 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
- C04B2201/05—Materials having an early high strength, e.g. allowing fast demoulding or formless casting
-
- 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
The invention discloses a kind of high temperature resistant Hearth Furnace concrete dry material sprays, it is related to the field of building materials, using bauxite chamotte as aggregate, using aluminate cement as cementitious material, with bauxite chamotte fine powder for heat-resisting powder, it is to promote to congeal into point with portland cement, using a certain proportion of sodium tripolyphosphate and calgon as composite water-reducing agent and setting time regulator using silicon powder as admixture；Weight percent shared by each component are as follows: bauxite chamotte aggregate 50 ~ 70%, bauxite chamotte fine powder 20 ~ 35%, aluminate cement 7.5 ~ 15%, silicon powder 5 ~ 10%, portland cement 2 ~ 5%, sodium tripolyphosphate 0.05 ~ 0.2%, calgon 0 ~ 0.2%.Semidry method sprayed construction construction technology can be used in the present invention, it can realize that concrete accelerated clotting time adjusts within the scope of 2 ~ 15min as needed, for strength grade of concrete up to C20, and with compression strength loss at 1000 DEG C less than 50%, scaling loss is less than 5%(mass percent) the characteristics of.
Description
Technical field
The invention belongs to the field of building materials, are related to a kind of high temperature resistant Hearth Furnace concrete dry material spray.
Background technique
Gunite concrete, using compressed air or other power, is mixed what is cooperated by a certain percentage by spraying machinery
Solidifying soil jetting material, made of condensation is hardened on scar, structures and the building being ejected by pipeline and at a high speed
A kind of concrete.Gunite concrete has many advantages, such as that easy construction is easy, maneuverability, in the lining cutting and supporting construction of palisades
It is commonly employed.Gunite concrete mainly has two kinds of forms of construction work of dry-type jetting and wet shotcrete technology.Wherein, dry-type jetting is
Dry mix (rush congeal into point admixed) is sent with concrete spraying machine, is sprayed after being mixed at nozzle with water；Wet shotcrete technology is
Accelerator is then added herein at the concrete mix force feed to nozzle for having added water to mix and stir with pump type spraying machine, is pressing
It is sprayed under the boosting of contracting air.
In high temperature such as explosions and it is accompanied by the underground sealed space of hazardous substance release, the lining cutting and branch of palisades or building
Shield is similarly needed using gunite concrete.However, common gunite concrete fire resistance is poor, can be broken under 1000 DEG C of high temperature
It is broken cracking and lose support capacity.This is because using the portland-type cements conduct such as portland cement, ordinary portland cement
The common gunite concrete of cementitious material other than generating the hydrated products such as dicalcium silicate, tricalcium silicate, is gone back in hydrated cementitious
A certain amount of calcium hydroxide can be generated, and hydrogenationization calcium fast decoupled at high temperature and " secondary digestion " process lead to concrete
The generation of underbead crack.In addition, scaling loss is also higher under common gunite concrete high temperature.On the one hand, common gunite concrete uses
Aggregate river sand in the calcium carbonate containing more amount, and calcium carbonate can decompose at a high temperature of being lower than 1000 DEG C and generate titanium dioxide
Carbon gas.On the other hand, a large amount of crystallization water can be introduced in cement hydration process, these crystallizations water can produce at high temperature from aquation
It sloughs and evaporates in object, so that concrete scaling loss further increases.Therefore, to reduce influence of the high temperature to concrete structure and make
At structural failure, gunite concrete itself have to have certain fire resistance.In addition, to reduce the gas of enclosure space under high temperature
It presses to reduce the leakage of harmful substance, it is necessary to control the oxidation of water, carbon dioxide, sulphur that each ingredient pyrolytic of concrete generates
Total burst size of the small molecules such as object.
Summary of the invention
The purpose of the present invention is to provide a kind of high temperature resistant Hearth Furnace concrete dry material spray formulas, using made from this formula
Gunite concrete setting time is adjustable in 3 ~ 15 minutes, and strength grade has compression strength loss at 1000 DEG C up to C20
Less than 50% and scaling loss is less than 5%(mass percent) the characteristics of.
To achieve the above object, the invention adopts the following technical scheme: a kind of high temperature resistant Hearth Furnace concrete dry material spray, with
Bauxite chamotte is aggregate, using aluminate cement as cementitious material, with high bauxite clinker powder for heat-resisting powder, with silicon powder
It is to promote to congeal into point with portland cement, with a certain proportion of sodium tripolyphosphate and calgon for compound diminishing for admixture
Agent and setting time regulator；Weight percent shared by each component are as follows: bauxite chamotte aggregate 50 ~ 70%, bauxite chamotte
Fine powder 20 ~ 35%, aluminate cement 7.5 ~ 15%, silicon powder 5 ~ 10%, sodium tripolyphosphate 0.05 ~ 0.2%, calgon 0 ~
0.2%。
Further: the production method is as follows steps for it:
S1: by 5 ~ 0mm bauxites aggregate, 200 mesh high-alumina flies, CA50-A900 aluminate cement, silicon powder, 42.5 normal silicates
Cement and sodium tripolyphosphate and calgon are according to the mass parts of each component are put into blender in formula 1 ~ 3 in table 1, even
3 minutes obtained concrete dry spices of continuous stirring；
S2: rapidly joining a certain amount of water into concrete dry spice and fresh concrete be made, and measures fresh concrete initial set
Time；
S3: fresh concrete is packed into tri- gang mould of 4cm × 4cm × 16cm after vibration compacting and hardening is made after maintenance 3d at 20 DEG C
Concrete product；
S4: measuring maturing compression strength, flexural strength, is heat-treated mass loss after sixty minutes at 1000 DEG C, and 1000
Compression strength after DEG C high-temperature process.
Further: the bauxite chamotte aggregate uses bauxite level-one, second level, three-level or level Four material, maximum grain
3 ~ 5mm of diameter, clay content (powder less than 0.088 μm) and water absorption rate are respectively less than 5%；Coarse sand or moulding gravel, fineness modulus 3.5 ~ 4,
Partial size is continuously distributed, and density is greater than 2.45g/cm3。
Further: the aluminate cement uses the CA50-A900 aluminate cement of high grade, prepared therefrom
3 days compression strength of standard mortar should be greater than 55MPa, and the presetting period is between 1 ~ 3 hour.
Further: the high bauxite clinker powder uses size specification for 200 mesh, and laser particle size analysis tests meso-position radius
D50 is between 40 ~ 50 μm, and D10 is greater than 2.5 μm, and D90 is less than 130 μm.
Further: the silicon powder uses average grain diameter between 0.1 ~ 0.5 μm, SiO2Content is greater than 90%.
Further: the portland cement is Portland clinker, ordinary portland cement or complex silicate salt water
The high alkaline silicate salt cement such as mud can promote the aquation of aluminate cement using the high alkalinity of such cement, shorten coagulation
Native setting time.
Further: the sodium tripolyphosphate and calgon are that chemistry is pure, quickly dissolving in powdered, pass through trimerization
The adjusting by a small margin of concrete coagulating time is realized in the variation of sodium phosphate and calgon ratio.
Compared with prior art, present invention is characterized in that
(1) use fire resisting, high grade aluminate cement for cementitious material, be with the bauxite chamotte that high temperature scaling loss is low
Aggregate and heat-resisting powder pass through the filling effect of silicon powder and refractory ceramics reaction and sodium tripolyphosphate and calgon
Water-reduction, in reducing concrete in the case where cement consumption, still ensure that sprayed concrete strength grade up to C20,
Concrete high temperature resistance is improved, the loss of concrete elevated temperature strength is reduced；
(2) using high alkalinity portland cement to the blood coagulation enhancing effect of aluminate cement, and sodium tripolyphosphate and hexa metaphosphoric acid are played
The setting time adjustment effect of sodium realizes that fast solidifying, the fast hard late strength of concrete that do not damage but of concrete develops；
(3) high temperature resistant Hearth Furnace gunite concrete prepared by the present invention has good fire resisting compared with common gunite concrete
Performance and low high temperature scaling loss.
Specific embodiment
Below in conjunction with specific embodiment, the present invention is further explained, and following embodiments is only used for illustrating this hair
It is bright, and protection scope of the present invention is not restricted by the embodiments, listed material is consistent with the requirement of material noted earlier.
A kind of high temperature resistant Hearth Furnace concrete dry material spray is gelling with aluminate cement using bauxite chamotte as aggregate
Material, using silicon powder as admixture, is to promote to congeal into point with portland cement, with one with high bauxite clinker powder for heat-resisting powder
The sodium tripolyphosphate and calgon of certainty ratio are composite water-reducing agent and setting time regulator；Weight percent shared by each component
Than are as follows: bauxite chamotte aggregate 50 ~ 70%, bauxite chamotte fine powder 20 ~ 35%, aluminate cement 7.5 ~ 15%, silicon powder 5 ~
10%, sodium tripolyphosphate 0.05 ~ 0.2%, calgon 0 ~ 0.2%.
The bauxite chamotte aggregate and 200 mesh high bauxite clinker powders that specification is 0 ~ 5mm are that Zhengzhou, henan Tagore is resistance to
The product of fiery Materials Co., Ltd；The aluminate cement of selection is Zhengzhou essence CA50-A900 aluminate cement；Silicon powder is peace
0.45 μm of average grain diameter of zirconium comprehensive silicon ash products of emblem Bangbu Zhong Heng new material Science and Technology Ltd. production；The silicate of selection
Cement is 42.5 ordinary portland cements in Xinjiang Tianshan cement plant；Sodium tripolyphosphate and calgon are purchased from the emerging hair in Hubei
Chemical Group limited liability company, chemistry is pure, quickly dissolving in powdered.
Embodiment 1:
S1: by 5 ~ 0mm bauxites aggregate, 200 mesh high-alumina flies, CA50-A900 aluminate cement, silicon powder, 42.5 normal silicates
Cement and sodium tripolyphosphate and calgon are according to the mass parts of each component are put into blender in formula 1 in table 1, continuously
Stir 3 minutes obtained concrete dry spices；
S2: 242kg water is rapidly joined into concrete dry spice, fresh concrete is made, and measure the fresh concrete presetting period
It is 15 minutes；
S3: fresh concrete is packed into tri- gang mould of 4cm × 4cm × 16cm after vibration compacting and hardening is made after maintenance 3d at 20 DEG C
Concrete product；
S4: measuring maturing compression strength is 30MPa, flexural strength 5.0MPa, is heat-treated after sixty minutes at 1000 DEG C
Mass loss be 4.5%, compression strength is 25MPa after 1000 DEG C of high-temperature process.
Embodiment 2:
S1: by 5 ~ 0mm bauxites aggregate, 200 mesh high-alumina flies, CA50-A900 aluminate cement, silicon powder, 42.5 normal silicates
Cement and calgon are continuously stirred 3 minutes and are made according to the mass parts of each component are put into blender in formula 2 in table 1
Obtain concrete dry spice；
S2: 245kg water is rapidly joined into concrete dry spice, fresh concrete is made, and measure the fresh concrete presetting period
It is 10 minutes；
S3: fresh concrete is packed into tri- gang mould of 4cm × 4cm × 16cm after vibration compacting and hardening is made after maintenance 3d at 20 DEG C
Concrete product；
S4: measuring maturing compression strength is 35MPa, and room temperature flexural strength is 5.5MPa, is heat-treated 60 points at 1000 DEG C
Mass loss after clock is 4.9%, and compression strength is 22MPa after 1000 DEG C of high-temperature process.
Embodiment 3:
S1: by 5 ~ 0mm bauxites aggregate, the bauxite chamotte of 200 mesh, CA50-A900 aluminate cement, silicon powder and trimerization
Sodium phosphate continuously stirs obtained concrete dry mixing in 3 minutes according to the mass parts of each component are put into blender in formula 3 in table 1
Material；
S2: 243kg water is rapidly joined into concrete dry spice, fresh concrete is made, and measure the fresh concrete presetting period
It is 2 ~ 5 minutes；
S3: fresh concrete is packed into tri- gang mould of 4cm × 4cm × 16cm after vibration compacting and hardening is made after maintenance 3d at 20 DEG C
Concrete product；
S4: measuring maturing compression strength is 28MPa, and room temperature flexural strength is 4.8MPa, is heat-treated 60 points at 1000 DEG C
Mass loss after clock is 4.4%, and compression strength is 24MPa after 1000 DEG C of high-temperature process.
1 high temperature resistant Hearth Furnace concrete dry material spray formula (kg/m of table3)
By embodiment 1 ~ 3 compare obtain: the present invention use fire resisting, high grade aluminate cement for cementitious material, with
The low bauxite chamotte of high temperature scaling loss is aggregate and heat-resisting powder, is reacted by the filling effect and refractory ceramicsization of silicon powder
And the water-reduction of sodium tripolyphosphate and calgon still ensures that in reducing concrete in the case where cement consumption
Sprayed concrete strength grade improves concrete high temperature resistance up to C20, reduces the loss of concrete elevated temperature strength；Utilize height
Alkaline silicate salt cement plays the setting time tune of sodium tripolyphosphate and calgon to the blood coagulation enhancing effect of aluminate cement
Section effect realizes that fast solidifying, the fast hard late strength of concrete that do not damage but of concrete develops；High temperature resistant prepared by the present invention simultaneously
Hearth Furnace gunite concrete has good fire resistance and low high temperature scaling loss compared with common gunite concrete.
In the description of the present invention, the terms "include", "comprise" or its any other variant are intended to nonexcludability
Include so that include a series of elements process, method, article or equipment not only include those elements, but also
Including other elements that are not explicitly listed, or further include for this process, method, article or equipment intrinsic want
Element.In the absence of more restrictions, the element limited by sentence " including a reference structure ", it is not excluded that including institute
State in the process, method, article or equipment of element that there is also other identical elements.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (8)
1. a kind of high temperature resistant Hearth Furnace concrete dry material spray, it is characterised in that: using bauxite chamotte as aggregate, with aluminic acid salt water
Mud is cementitious material, is to promote to congeal into portland cement using silicon powder as admixture with high bauxite clinker powder for heat-resisting powder
Point, using a certain proportion of sodium tripolyphosphate and calgon as composite water-reducing agent and setting time regulator；Shared by each component
Weight percent are as follows: bauxite chamotte aggregate 50 ~ 70%, bauxite chamotte fine powder 20 ~ 35%, aluminate cement 7.5 ~ 15%,
Silicon powder 5 ~ 10%, sodium tripolyphosphate 0.05 ~ 0.2%, calgon 0 ~ 0.2%.
2. a kind of high temperature resistant Hearth Furnace concrete dry material spray according to claim 1, it is characterised in that: its production method is such as
Lower step:
S1: by 5 ~ 0mm bauxites aggregate, 200 mesh high-alumina flies, CA50-A900 aluminate cement, silicon powder, 42.5 normal silicates
Cement and sodium tripolyphosphate and calgon are according to the mass parts of each component are put into blender in formula 1 ~ 3 in table 1, even
3 minutes obtained concrete dry spices of continuous stirring；
S2: rapidly joining a certain amount of water into concrete dry spice and fresh concrete be made, and measures fresh concrete initial set
Time；
S3: fresh concrete is packed into tri- gang mould of 4cm × 4cm × 16cm after vibration compacting and hardening is made after maintenance 3d at 20 DEG C
Concrete product；
S4: measuring maturing compression strength, flexural strength, is heat-treated mass loss after sixty minutes at 1000 DEG C, and 1000
Compression strength after DEG C high-temperature process.
3. a kind of high temperature resistant Hearth Furnace concrete dry material spray according to claim 1, it is characterised in that: the alumine
Clinker aggregate uses bauxite level-one, second level, three-level or level Four material, and 3 ~ 5mm of maximum particle diameter, clay content and water absorption rate are respectively less than
5%；Coarse sand or moulding gravel, fineness modulus 3.5 ~ 4, partial size is continuously distributed, and density is greater than 2.45g/cm3。
4. a kind of high temperature resistant Hearth Furnace concrete dry material spray according to claim 1, it is characterised in that: the aluminic acid salt water
Mud uses the CA50-A900 aluminate cement of high grade, and 3 days compression strength of standard mortar prepared therefrom should be greater than
55MPa, the presetting period is between 1 ~ 3 hour.
5. a kind of high temperature resistant Hearth Furnace concrete dry material spray according to claim 1, it is characterised in that: the alumine
Chamotte powder uses size specification for 200 mesh, and laser particle size analysis tests meso-position radius D50 between 40 ~ 50 μm, and D10 is greater than 2.5 μ
M, D90 are less than 130 μm.
6. a kind of high temperature resistant Hearth Furnace concrete dry material spray according to claim 1, it is characterised in that: the silicon powder is adopted
With average grain diameter between 0.1 ~ 0.5 μm, SiO2Content is greater than 90%.
7. a kind of high temperature resistant Hearth Furnace concrete dry material spray according to claim 1, it is characterised in that: the silicate cement
Mud is Portland clinker, ordinary portland cement or composite Portland cement.
8. a kind of high temperature resistant Hearth Furnace concrete dry material spray according to claim 1, it is characterised in that: the tripolyphosphate
Sodium and calgon are that chemistry is pure, quickly dissolving in powdered, pass through the variation reality of sodium tripolyphosphate and calgon ratio
The adjusting by a small margin of existing concrete coagulating time.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910000236.8A CN109650827B (en) | 2019-01-01 | 2019-01-01 | High-temperature-resistant low-burning-loss concrete dry-spraying material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910000236.8A CN109650827B (en) | 2019-01-01 | 2019-01-01 | High-temperature-resistant low-burning-loss concrete dry-spraying material |
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| CN109650827B CN109650827B (en) | 2021-07-30 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1236699A1 (en) * | 2001-03-01 | 2002-09-04 | Sika AG, vorm. Kaspar Winkler & Co. | Composite material and shaped article with thermal conductivity and specific gravity on demand |
| CN104150845A (en) * | 2014-08-12 | 2014-11-19 | 杭州固华复合材料科技有限公司 | Ultrahigh-toughness cement-based composite material used in ejection, and ejection process thereof |
| CN107488040A (en) * | 2017-07-27 | 2017-12-19 | 德清凯瑞高温材料股份有限公司 | One kind is exempted to toast pouring basket lid and preparation method |
-
2019
- 2019-01-01 CN CN201910000236.8A patent/CN109650827B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1236699A1 (en) * | 2001-03-01 | 2002-09-04 | Sika AG, vorm. Kaspar Winkler & Co. | Composite material and shaped article with thermal conductivity and specific gravity on demand |
| CN104150845A (en) * | 2014-08-12 | 2014-11-19 | 杭州固华复合材料科技有限公司 | Ultrahigh-toughness cement-based composite material used in ejection, and ejection process thereof |
| CN107488040A (en) * | 2017-07-27 | 2017-12-19 | 德清凯瑞高温材料股份有限公司 | One kind is exempted to toast pouring basket lid and preparation method |
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