CN108285313A - Sulphate aluminium cement concrete for constructing under low temperature and preparation method thereof - Google Patents
Sulphate aluminium cement concrete for constructing under low temperature and preparation method thereof Download PDFInfo
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- CN108285313A CN108285313A CN201810233353.4A CN201810233353A CN108285313A CN 108285313 A CN108285313 A CN 108285313A CN 201810233353 A CN201810233353 A CN 201810233353A CN 108285313 A CN108285313 A CN 108285313A
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- 239000004568 cement Substances 0.000 title claims abstract description 101
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 80
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 80
- 239000004411 aluminium Substances 0.000 title claims abstract description 80
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 title claims abstract description 78
- 229910021653 sulphate ion Inorganic materials 0.000 title claims abstract description 78
- 238000002360 preparation method Methods 0.000 title claims abstract description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 45
- 239000002086 nanomaterial Substances 0.000 claims abstract description 36
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 35
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 19
- 239000011707 mineral Substances 0.000 claims abstract description 19
- 238000010276 construction Methods 0.000 claims abstract description 14
- 239000000203 mixture Substances 0.000 claims abstract description 14
- 238000003756 stirring Methods 0.000 claims description 26
- 229910000329 aluminium sulfate Inorganic materials 0.000 claims description 14
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 14
- 235000011128 aluminium sulphate Nutrition 0.000 claims description 14
- 238000002156 mixing Methods 0.000 claims description 12
- 239000000843 powder Substances 0.000 claims description 10
- 239000004576 sand Substances 0.000 claims description 10
- 238000005303 weighing Methods 0.000 claims description 10
- 239000002956 ash Substances 0.000 claims description 6
- 239000002893 slag Substances 0.000 claims description 6
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 150000003839 salts Chemical class 0.000 claims description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 3
- 239000005864 Sulphur Substances 0.000 claims description 3
- 239000010881 fly ash Substances 0.000 claims description 3
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 2
- 238000009628 steelmaking Methods 0.000 claims description 2
- 239000004575 stone Substances 0.000 claims 1
- 230000036571 hydration Effects 0.000 abstract description 13
- 238000006703 hydration reaction Methods 0.000 abstract description 13
- 230000015271 coagulation Effects 0.000 abstract description 4
- 238000005345 coagulation Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000002689 soil Substances 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 20
- 230000000052 comparative effect Effects 0.000 description 19
- 230000008569 process Effects 0.000 description 14
- 239000013078 crystal Substances 0.000 description 4
- 238000002425 crystallisation Methods 0.000 description 4
- 239000002002 slurry Substances 0.000 description 3
- 239000011398 Portland cement Substances 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- GDVKFRBCXAPAQJ-UHFFFAOYSA-A dialuminum;hexamagnesium;carbonate;hexadecahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Al+3].[Al+3].[O-]C([O-])=O GDVKFRBCXAPAQJ-UHFFFAOYSA-A 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910001701 hydrotalcite Inorganic materials 0.000 description 2
- 229960001545 hydrotalcite Drugs 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000003467 diminishing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 125000001624 naphthyl group Chemical group 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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
- C04B28/06—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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
- C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
Landscapes
- 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 present invention provides a kind of sulphate aluminium cement concrete and preparation method thereof for constructing under low temperature, counts in parts by weight, sulphate aluminium cement concrete includes following component：Sulphate aluminium cement, 75 100 parts；Mineral admixture, 0 25 parts；Water, 25 50 parts；Water-reducing agent, 0.3 1.5 parts；Coarse aggregate, 200 350 parts；Fine aggregate, 150 240 parts；Nano material, 0.1 5 parts；Wherein, the total amount of sulphate aluminium cement and mineral admixture and be 100 parts.Nano material is increased in the present invention, nano material can accelerate the hydration rate of sulphate aluminium cement under low temperature, improve the early strength of concrete.Sulphate aluminium cement concrete prepared by the present invention can DEG C construction application at a lower temperature≤10, and 1d intensity is not mix 25 times of height of coagulation with nano-material soil, solves the sulphate aluminium cement concrete relatively low technical problem of early strength at low temperature in the prior art.The preparation method simple operations are easy, easy to control, energy-saving, reduce production cost, can obtain popularization and application energetically.
Description
Technical field
The invention belongs to technical field of inorganic nonmetallic materials, and in particular to a kind of aluminium sulfate for constructing under low temperature
Cement concrete and preparation method thereof.
Background technology
Sulphate aluminium cement is the cement and the maximum special cement of China's yield that invention is independently studied by China,
Setting time is short, and strength development is fast, and its hydrated product is different from portland cement, therefore prepared with the sulphate aluminium cement
The erosion of the resistance to salt of concrete, impervious, frost resistance are also apparently higher than Portland cement concrete (PCC), can be in the building for having particular/special requirement
It is applied in engineering.But lower in winter or temperature, the aquation of sulphate aluminium cement is slow, thus the coagulation prepared with it
Native early strength is far below the same age strength of identical proportioning concrete under room temperature.
Accordingly, it is desirable to provide a kind of improved technology scheme insufficient for the above-mentioned prior art.
Invention content
The present invention for overcome the deficiencies in the prior art, it is mixed to provide a kind of sulphate aluminium cement for constructing under low temperature
Solidifying soil and preparation method thereof.
To achieve the goals above, the present invention provides the following technical solutions：
A kind of sulphate aluminium cement concrete for constructing under low temperature is counted, the sulphate aluminium cement in parts by weight
Concrete includes following component：Sulphate aluminium cement, 75-100 parts；Mineral admixture, 0-25 parts；Water, 25-50 parts；Water-reducing agent,
0.3-1.5 parts；Coarse aggregate, 200-350 parts；Fine aggregate, 150-240 parts；Nano material, 0.1-5 parts；Wherein, the sulphur aluminic acid
The total amount of salt cement and the mineral admixture and be 100 parts.
Sulphate aluminium cement concrete as described above, it is preferable that the mineral admixture is flyash, slag powders, slag
Middle one kind or a variety of powder mixed with arbitrary proportion of powder, agstone, volcanic ash, silicon ash and metakaolin.
Sulphate aluminium cement concrete as described above, it is preferable that the coarse aggregate is one kind in rubble and cobble, or
A variety of mixtures formed with arbitrary proportion；Preferably, the coarse aggregate is one in 5-25mm continuous gradings rubble and cobble
Kind or a variety of mixtures formed with arbitrary proportion.
Sulphate aluminium cement concrete as described above, it is preferable that the fine aggregate is one kind in river sand and Machine-made Sand, or
The a variety of mixtures formed with arbitrary proportion of person；Preferably, the fine aggregate is in 0-5mm continuous gradings river sand and Machine-made Sand
One kind or a variety of mixtures formed with arbitrary proportion.
Sulphate aluminium cement concrete as described above, it is preferable that the nano material is nano hydrotalcite；Preferably, institute
It is that particle size is less than 100nm to state nano material.
Sulphate aluminium cement concrete as described above, it is preferable that the water-reducing agent be naphthalene system of the water-reducing rate more than 20% or
One kind in polycarboxylic acid concrete water-reducing agent.
Sulphate aluminium cement concrete as described above, it is preferable that the sulphate aluminium cement is label 52.5 or 62.5
Quick hardening sulphoaluminate cement；Preferably, the sulphate aluminium cement concrete can in≤10 DEG C of temperature environments construction application.
A kind of preparation method of sulphate aluminium cement concrete as described above, the preparation method include the following steps：
1) after sulphate aluminium cement, mineral admixture, coarse aggregate, fine aggregate, nano material being weighed by said ratio
It is put into concrete mixer and stirs evenly, mixing time 1-3min obtains concrete drier；
2) water and water-reducing agent are weighed according to the ratio；Water-reducing agent after weighing is poured into water and is stirred evenly, mixing time is
0.5-1.5min；
3) be further continued for whipping step 1) in concrete drier, and will be stirred evenly in step 2) the stirring during
Water and water-reducing agent are integrally poured into blender, after stirring 2-4min, obtain the aluminium sulfate water for constructing at low temperature≤10 DEG C
Cement concrete.
Compared with the immediate prior art, technical solution provided by the invention has the advantages that：
1, nano material is increased in technical scheme of the present invention, nano material can accelerate sulphate aluminium cement under low temperature
Hydration rate improves the early strength of concrete.The main hydration products of sulphate aluminium cement are crystal, and hydration process is molten
The speed of solution-crystallization process, this process is controlled by temperature.Under room temperature (20 DEG C or so), hydration process is fast, and early stage is strong
Degree is high.But temperature reduces, this process slows, and strength development is slow, and early strength is low.Nano material is in aluminium sulfate water
Play the role of crystal seed in the hydration process of mud, to accelerate crystallization process；And the ion concentration reduction so that in solution is crystallized,
Course of dissolution is accelerated again, to make the hydration rate of sulphate aluminium cement under low temperature improve, thus improves aluminium sulfate water
The early strength of cement concrete, and the retraction of later strength will not be caused.
2, nano-grain size of the invention is small, and nano-grain size is less than 100nm, can be filled in cement water
In the gap for changing product, keep sulphate aluminium cement slurry more densely cross-linked, intensity is further enhanced.
3, the sulphate aluminium cement concrete for preparing of the present invention can (≤10 DEG C) construction application at a lower temperature, and 1d is strong
Degree be do not mix coagulation with nano-material soil it is 2-5 times high, solve in the prior art sulphate aluminium cement concrete at low temperature morning
The relatively low technical problem of phase intensity.
4, preparation method simple operations of the present invention are easy, easy to control, energy-saving, reduce production cost, can obtain big
The popularization and application of power.
Specific implementation mode
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is general
The every other embodiment that logical technical staff is obtained, shall fall within the protection scope of the present invention.
Specific embodiments of the present invention provide a kind of sulphate aluminium cement concrete for (≤10 DEG C) constructions under low temperature
And preparation method thereof, the technical solution provided in the present invention improves the early strength of sulphate aluminium cement concrete, and will not
Cause the retraction of later strength.The nano-grain size that the present invention is added is less than 100nm, can be filled in hydrolysis product of cement
Gap in, keep sulphate aluminium cement slurry more densely cross-linked, intensity is further enhanced.Preparation method simple operations of the present invention
Simplicity, it is easy to control, it is energy-saving, production cost is reduced, popularization and application energetically can be obtained.
First, the present invention provides a kind of sulphate aluminium cement concrete for (≤10 DEG C) constructions under low temperature, sulphur aluminium
Acid salt cement, 75-100 parts (such as 78 parts, 80 parts, 82 parts, 85 parts, 88 parts, 90 parts, 92 parts, 94 parts, 96 parts, 98 parts, 99
Part)；Mineral admixture, 0-25 parts (such as 3 parts, 5 parts, 8 parts, 10 parts, 12 parts, 15 parts, 17 parts, 20 parts, 22 parts, 23 parts, 24
Part)；Water, 25-50 parts (such as 28 parts, 30 parts, 32 parts, 35 parts, 38 parts, 40 parts, 42 parts, 44 parts, 46 parts, 48 parts, 49 parts)；Subtract
Aqua, 0.3-1.5 parts (such as 0.5 part, 0.7 part, 0.9 part, 1 part, 1.1 parts, 1.2 parts, 0.6 part, 0.8 part, 1.3 parts, 1.4 parts,
1.45 part)；Coarse aggregate, 200-350 parts (such as 220 parts, 240 parts, 250 parts, 260 parts, 270 parts, 290 parts, 300 parts, 310 parts,
320 parts, 330 parts, 340 parts)；Fine aggregate, 150-240 parts (such as 160 parts, 170 parts, 180 parts, 190 parts, 210 parts, 220 parts,
230 parts, 225 parts, 235 parts, 215 parts, 185 parts)；Nano material, 0.1-5 parts (such as 0.5 part, 1 part, 1.5 parts, 2 parts, 2.5
Part, 3 parts, 3.5 parts, 4 parts, 4.5 parts, 4.6 parts, 4.8 parts)；Wherein, the total amount of sulphate aluminium cement and mineral admixture and it is
100 parts.
In a specific embodiment of the present invention, mineral admixture is commercially available flyash, slag powders, steel-making slag powder, lime stone
Middle one kind or a variety of powder mixed with arbitrary proportion of powder, volcanic ash, silicon ash and metakaolin.
In a specific embodiment of the present invention, coarse aggregate is one kind in 5-25mm continuous gradings rubble, cobble, Huo Zheduo
The mixture that kind is formed with arbitrary proportion.
In a specific embodiment of the present invention, fine aggregate is one kind in 0-5mm continuous gradings river sand, Machine-made Sand, or
A variety of mixtures formed with arbitrary proportion.
In a specific embodiment of the present invention, it is preferable that nano material is the nano hydrotalcite that particle size is less than 100nm.
In a specific embodiment of the present invention, water-reducing agent is naphthalene system of the water-reducing rate more than 20% or polycarboxylic acid concrete diminishing
One kind in agent.
Further preferably, sulphate aluminium cement is the quick hardening sulphoaluminate cement of label 52.5 or 62.5.
In addition, specific embodiments of the present invention also provide a kind of preparation method of sulphate aluminium cement concrete, feature
It is that the preparation method includes the following steps：
1) after sulphate aluminium cement, mineral admixture, coarse aggregate, fine aggregate, nano material being weighed by said ratio
It is put into concrete mixer and stirs evenly, mixing time 1-3min obtains concrete drier；
2) water and water-reducing agent are weighed according to the ratio；Water-reducing agent after weighing is poured into water and is stirred evenly, mixing time is
0.5-1.5min；
3) be further continued for whipping step 1) in concrete drier, and will be stirred evenly in step 2) the stirring during
Water and water-reducing agent are integrally poured into blender, after stirring 2-4min, obtain the aluminium sulfate for (≤10 DEG C) constructions under low temperature
Cement concrete.
Embodiment 1
Specific embodiments of the present invention also provide a kind of preparation method of sulphate aluminium cement concrete, the preparation method packet
Include following steps：
1) 100 parts of sulphate aluminium cement, 300 parts of coarse aggregate, 220 parts of fine aggregate, 3 parts of nano material are claimed by said ratio
It is put into concrete mixer and stirs evenly after amount is good, mixing time 2min obtains concrete drier；
2) 1 part of 30 parts of water and water-reducing agent are weighed according to the ratio；Water-reducing agent after weighing is poured into water and is stirred evenly, is stirred
Time is 1min；
3) be further continued for whipping step 1) in concrete drier, and will be stirred evenly in step 2) the stirring during
Water and water-reducing agent are integrally poured into blender, after stirring 3min, obtain the aluminium sulfate water for (≤10 DEG C) constructions under low temperature
Cement concrete.
Comparative example 1
This comparative example provides a kind of preparation method of sulphate aluminium cement concrete, this comparative example is not incorporated into nano material,
Other methods step is same as Example 1, and therefore not to repeat here.
Embodiment 2
Specific embodiments of the present invention also provide a kind of preparation method of sulphate aluminium cement concrete, and preparation method includes
Following steps：
1) by 75 parts of sulphate aluminium cement, 25 parts of mineral admixture, 350 parts of coarse aggregate, 240 parts of fine aggregate, nano material
0.1 part weighed by said ratio after be put into concrete mixer and stir evenly, mixing time 1.5min obtains concrete dry
Material；
2) 1.2 parts of 28 parts of water and water-reducing agent are weighed according to the ratio；Water-reducing agent after weighing is poured into water and is stirred evenly, is stirred
It is 1min to mix the time；
3) be further continued for whipping step 1) in concrete drier, and will be stirred evenly in step 2) the stirring during
Water and water-reducing agent are integrally poured into blender, after stirring 3min, obtain the aluminium sulfate water for (≤10 DEG C) constructions under low temperature
Cement concrete.
Comparative example 2
This comparative example provides a kind of preparation method of sulphate aluminium cement concrete, this comparative example is not incorporated into nano material,
Other methods step is same as Example 2, and therefore not to repeat here.
Embodiment 3
Specific embodiments of the present invention also provide a kind of preparation method of sulphate aluminium cement concrete, and preparation method includes
Following steps：
1) by 80 parts of sulphate aluminium cement, 20 parts of mineral admixture, 200 parts of coarse aggregate, 150 parts of fine aggregate, nano material 5
Part is put into concrete mixer after being weighed by said ratio and stirs evenly, and mixing time 3min obtains concrete drier；
2) 0.3 part of 50 parts of water and water-reducing agent are weighed according to the ratio；Water-reducing agent after weighing is poured into water and is stirred evenly, is stirred
It is 1.5min to mix the time；
3) be further continued for whipping step 1) in concrete drier, and will be stirred evenly in step 2) the stirring during
Water and water-reducing agent are integrally poured into blender, after stirring 4min, obtain the aluminium sulfate water for (≤10 DEG C) constructions under low temperature
Cement concrete.
Comparative example 3
This comparative example provides a kind of preparation method of sulphate aluminium cement concrete, this comparative example is not incorporated into nano material,
Other methods step is same as Example 3, and therefore not to repeat here.
Embodiment 4
Specific embodiments of the present invention also provide a kind of preparation method of sulphate aluminium cement concrete, and preparation method includes
Following steps：
1) by 90 parts of sulphate aluminium cement, 10 parts of mineral admixture, 280 parts of coarse aggregate, 160 parts of fine aggregate, nano material 3
Part is put into concrete mixer after being weighed by said ratio and stirs evenly, and mixing time 2min obtains concrete drier；
2) 0.5 part of 40 parts of water and water-reducing agent are weighed according to the ratio；Water-reducing agent after weighing is poured into water and is stirred evenly, is stirred
It is 1min to mix the time；
3) be further continued for whipping step 1) in concrete drier, and will be stirred evenly in step 2) the stirring during
Water and water-reducing agent are integrally poured into blender, after stirring 3min, obtain the aluminium sulfate water for (≤10 DEG C) constructions under low temperature
Cement concrete.
Comparative example 4
This comparative example provides a kind of preparation method of sulphate aluminium cement concrete, this comparative example is not incorporated into nano material,
Other methods step is same as Example 4, and therefore not to repeat here.
Embodiment 5
Specific embodiments of the present invention also provide a kind of preparation method of sulphate aluminium cement concrete, and preparation method includes
Following steps：
1) by 82 parts of sulphate aluminium cement, 18 parts of mineral admixture, 300 parts of coarse aggregate, 180 parts of fine aggregate, nano material
0.1 part weighed by said ratio after be put into concrete mixer and stir evenly, mixing time 3min obtains concrete dry
Material；
2) 1.5 parts of 25 parts of water and water-reducing agent are weighed according to the ratio；Water-reducing agent after weighing is poured into water and is stirred evenly, is stirred
It is 1min to mix the time；
3) be further continued for whipping step 1) in concrete drier, and will be stirred evenly in step 2) the stirring during
Water and water-reducing agent are integrally poured into blender, after stirring 3min, obtain the aluminium sulfate water for (≤10 DEG C) constructions under low temperature
Cement concrete.
Comparative example 5
This comparative example provides a kind of preparation method of sulphate aluminium cement concrete, this comparative example is not incorporated into nano material,
Other methods step is same as Example 5, and therefore not to repeat here.
Embodiment 6
Specific embodiments of the present invention also provide a kind of preparation method of sulphate aluminium cement concrete, it is characterised in that institute
Preparation method is stated to include the following steps：
1) by 95 parts of sulphate aluminium cement, 5 parts of mineral admixture, 320 parts of coarse aggregate, 190 parts of fine aggregate, nano material 2
Part is put into concrete mixer after being weighed by said ratio and stirs evenly, and mixing time 2min obtains concrete drier；
2) 0.4 part of 43 parts of water and water-reducing agent are weighed according to the ratio；Water-reducing agent after weighing is poured into water and is stirred evenly, is stirred
It is 1min to mix the time；
3) be further continued for whipping step 1) in concrete drier, and will be stirred evenly in step 2) the stirring during
Water and water-reducing agent are integrally poured into blender, after stirring 3min, obtain the aluminium sulfate water for (≤10 DEG C) constructions under low temperature
Cement concrete.
Comparative example 6
This comparative example provides a kind of preparation method of sulphate aluminium cement concrete, this comparative example is not incorporated into nano material,
Other methods step is same as Example 6, and therefore not to repeat here.
According to by《Standard for test methods of mechanical properties of ordinary concrete》The standard test of (GB/T 50081-2002) is to upper
The sulphate aluminium cement concrete and its do not mix nano material comparative example 1-6 progress performance detections that embodiment 1-6 is obtained are stated, it is related
Performance indicator inspection result is shown in Table 1.
1 each embodiment ruggedness test result/MPa of table
In conclusion the present invention has following advantageous effects：
1, nano material is increased in technical scheme of the present invention, nano material can accelerate sulphate aluminium cement under low temperature
Hydration rate improves the early strength of concrete.The main hydration products of sulphate aluminium cement are crystal, and hydration process is molten
The speed of solution-crystallization process, this process is controlled by temperature.Under room temperature (20 DEG C or so), hydration process is fast, and early stage is strong
Degree is high.But temperature reduces, this process slows, and strength development is slow, and early strength is low.Nano material is in aluminium sulfate water
Play the role of crystal seed in the hydration process of mud, to accelerate crystallization process；And the ion concentration reduction so that in solution is crystallized,
Course of dissolution is accelerated again, to make the hydration rate of sulphate aluminium cement under low temperature improve, thus improves aluminium sulfate water
The early strength of cement concrete, and the retraction of later strength will not be caused.
2, nano-grain size of the invention is small, and nano-grain size is less than 100nm, can be filled in cement water
In the gap for changing product, keep sulphate aluminium cement slurry more densely cross-linked, intensity is further enhanced.
3, the sulphate aluminium cement concrete for preparing of the present invention can (≤10 DEG C) construction application at a lower temperature, and 1d is strong
Degree be do not mix coagulation with nano-material soil it is 2-5 times high, solve in the prior art sulphate aluminium cement early strength of concrete compared with
Low technical problem.
4, preparation method simple operations of the present invention are easy, easy to control, energy-saving, reduce production cost, can obtain big
The popularization and application of power.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God and principle within, any modification, equivalent replacement, improvement and so on, accompanying claims protection domain of the present invention it
It is interior.
Claims (8)
1. a kind of sulphate aluminium cement concrete for constructing under low temperature, which is characterized in that count in parts by weight, the sulphur aluminium
Acid salt cement concrete includes following component：
Sulphate aluminium cement, 75-100 parts；Mineral admixture, 0-25 parts；Water, 25-50 parts；Water-reducing agent, 0.3-1.5 parts；Rough set
Material, 200-350 parts；Fine aggregate, 150-240 parts；Nano material, 0.1-5 parts；
Wherein, the total amount of the sulphate aluminium cement and the mineral admixture and be 100 parts.
2. sulphate aluminium cement concrete as described in claim 1, which is characterized in that the mineral admixture be flyash,
Slag powders, steel-making slag powder, agstone, volcanic ash, silicon ash and metakaolin middle one kind or it is a variety of with arbitrary proportion mixes and
At powder.
3. sulphate aluminium cement concrete as described in claim 1, which is characterized in that the coarse aggregate is in rubble and cobble
One kind or it is a variety of with arbitrary proportion formed mixture；
Preferably, the coarse aggregate is 5-25mm continuous gradings rubble and one kind or a variety of with arbitrary proportion shape in cobble
At mixture.
4. sulphate aluminium cement concrete as described in claim 1, which is characterized in that the fine aggregate is river sand and Machine-made Sand
In one kind or it is a variety of with arbitrary proportion formed mixture；
Preferably, the fine aggregate is 0-5mm continuous gradings river sand and one kind or a variety of with arbitrary proportion shape in Machine-made Sand
At mixture.
5. sulphate aluminium cement concrete as described in claim 1, which is characterized in that the nano material is a nanometer neatly
Stone；
Preferably, the nano material is that particle size is less than 100nm.
6. sulphate aluminium cement concrete as described in claim 1, which is characterized in that the water-reducing agent is that water-reducing rate is more than
One kind in 20% naphthalene system or polycarboxylic acid concrete water-reducing agent.
7. sulphate aluminium cement concrete as described in claim 1, which is characterized in that the sulphate aluminium cement is label
52.5 or 62.5 quick hardening sulphoaluminate cement；
Preferably, the sulphate aluminium cement concrete can in≤10 DEG C of temperature environments construction application.
8. a kind of preparation method of such as claim 1-7 any one of them sulphate aluminium cement concrete, which is characterized in that institute
Preparation method is stated to include the following steps：
1) it is put into after weighing sulphate aluminium cement, mineral admixture, coarse aggregate, fine aggregate, nano material by said ratio
It is stirred evenly in concrete mixer, mixing time 1-3min obtains concrete drier；
2) water and water-reducing agent are weighed according to the ratio；Water-reducing agent after weighing is poured into water and is stirred evenly, mixing time 0.5-
1.5min；
3) be further continued for whipping step 1) in concrete drier, and during stirring by the water stirred evenly in step 2) and
Water-reducing agent is integrally poured into blender, after stirring 2-4min, obtains the aluminium sulfate water for constructing under the environment of low temperature≤10 DEG C
Cement concrete.
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| CN109851302A (en) * | 2019-01-14 | 2019-06-07 | 海南大学 | A kind of modified sulphoaluminate cement base restoring material and preparation method thereof |
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