CN113264711A - Powder alkali-free accelerator and preparation method, use method and application thereof - Google Patents
Powder alkali-free accelerator and preparation method, use method and application thereof Download PDFInfo
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- CN113264711A CN113264711A CN202110721344.1A CN202110721344A CN113264711A CN 113264711 A CN113264711 A CN 113264711A CN 202110721344 A CN202110721344 A CN 202110721344A CN 113264711 A CN113264711 A CN 113264711A
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- 239000000843 powder Substances 0.000 title claims abstract description 102
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000002360 preparation method Methods 0.000 title claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 30
- 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 abstract description 29
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000011777 magnesium Substances 0.000 claims abstract description 22
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 22
- 238000002156 mixing Methods 0.000 claims abstract description 19
- 239000003463 adsorbent Substances 0.000 claims abstract description 17
- -1 alcohol amine Chemical class 0.000 claims abstract description 17
- 239000003381 stabilizer Substances 0.000 claims abstract description 12
- 239000002994 raw material Substances 0.000 claims abstract description 4
- 239000002245 particle Substances 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 12
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 claims description 10
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 claims description 10
- 229910021536 Zeolite Inorganic materials 0.000 claims description 9
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 9
- 239000010457 zeolite Substances 0.000 claims description 9
- 230000003472 neutralizing effect Effects 0.000 claims description 8
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 claims description 7
- 239000004567 concrete Substances 0.000 claims description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 6
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 6
- 239000000347 magnesium hydroxide Substances 0.000 claims description 6
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 6
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 claims description 4
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 4
- SLINHMUFWFWBMU-UHFFFAOYSA-N Triisopropanolamine Chemical compound CC(O)CN(CC(C)O)CC(C)O SLINHMUFWFWBMU-UHFFFAOYSA-N 0.000 claims description 3
- 239000000440 bentonite Substances 0.000 claims description 3
- 229910000278 bentonite Inorganic materials 0.000 claims description 3
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 3
- RKGLUDFWIKNKMX-UHFFFAOYSA-L dilithium;sulfate;hydrate Chemical compound [Li+].[Li+].O.[O-]S([O-])(=O)=O RKGLUDFWIKNKMX-UHFFFAOYSA-L 0.000 claims description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 3
- 239000000378 calcium silicate Substances 0.000 claims description 2
- 229910052918 calcium silicate Inorganic materials 0.000 claims description 2
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 claims description 2
- LVTYICIALWPMFW-UHFFFAOYSA-N diisopropanolamine Chemical compound CC(O)CNCC(C)O LVTYICIALWPMFW-UHFFFAOYSA-N 0.000 claims description 2
- 229940043276 diisopropanolamine Drugs 0.000 claims description 2
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 claims description 2
- VXWSFRMTBJZULV-UHFFFAOYSA-H iron(3+) sulfate hydrate Chemical compound O.[Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O VXWSFRMTBJZULV-UHFFFAOYSA-H 0.000 claims description 2
- 229910000360 iron(III) sulfate Inorganic materials 0.000 claims description 2
- 239000000395 magnesium oxide Substances 0.000 claims description 2
- 229910052943 magnesium sulfate Inorganic materials 0.000 claims description 2
- 235000019341 magnesium sulphate Nutrition 0.000 claims description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical group [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims 1
- 229910052782 aluminium Inorganic materials 0.000 claims 1
- 239000007788 liquid Substances 0.000 abstract description 13
- 230000000694 effects Effects 0.000 abstract description 4
- 238000003860 storage Methods 0.000 abstract description 4
- 230000014759 maintenance of location Effects 0.000 abstract description 3
- 239000003513 alkali Substances 0.000 description 15
- 238000003756 stirring Methods 0.000 description 13
- 230000000052 comparative effect Effects 0.000 description 10
- 239000011378 shotcrete Substances 0.000 description 7
- 238000010276 construction Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 description 4
- WRUGWIBCXHJTDG-UHFFFAOYSA-L magnesium sulfate heptahydrate Chemical compound O.O.O.O.O.O.O.[Mg+2].[O-]S([O-])(=O)=O WRUGWIBCXHJTDG-UHFFFAOYSA-L 0.000 description 3
- 229940061634 magnesium sulfate heptahydrate Drugs 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 229910052593 corundum Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011775 sodium fluoride Substances 0.000 description 2
- 235000013024 sodium fluoride Nutrition 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229910001845 yogo sapphire Inorganic materials 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910000329 aluminium sulfate Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 238000009440 infrastructure construction Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- FYYHWMGAXLPEAU-OUBTZVSYSA-N magnesium-25 atom Chemical group [25Mg] FYYHWMGAXLPEAU-OUBTZVSYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000004078 waterproofing 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
-
- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/10—Accelerators; Activators
- C04B2103/12—Set accelerators
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a powder alkali-free accelerator, and a preparation method, a use method and application thereof. The powder alkali-free accelerator comprises raw materials of aluminum sulfate, magnesium fluosilicate, an adsorbent, alcohol amine, an early strength agent, a stabilizer and an optional neutralizer, wherein the water content of the powder alkali-free accelerator is not more than 2 wt%. The powder alkali-free setting accelerator can reduce the storage and transportation cost in severe environment and long-distance transportation process, is convenient to use and good in effect, and the liquid alkali-free setting accelerator prepared by mixing and dissolving the powder alkali-free setting accelerator with water has the characteristics of low mixing amount, quick setting, high early strength and high later strength retention rate and the like.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to a powder alkali-free accelerator, and a preparation method, a use method and application thereof.
Background
With the development of national infrastructure construction, the application of the shotcrete in projects such as tunnels, bridges and the like is more and more extensive, and the accelerator with the characteristic of rapid setting and hardening becomes one of the essential additives of the modern shotcrete. Although the traditional alkaline accelerating agent can meet the construction requirement of the sprayed concrete accelerating agent, the later strength and durability of the concrete are adversely affected due to the overhigh alkali content and strong corrosivity. Compared with the alkali accelerating agent, the liquid alkali-free accelerating agent represented by an aluminum sulfate type is gradually replacing the alkali accelerating agent to become the accelerating agent with the advantages of higher long-term strength retention rate, no alkali or chlorine, safety, environmental protection, high durability and the like.
However, the problems of inconvenient storage and transportation of the liquid alkali-free accelerator product are more obvious, and particularly, the cost is obviously increased in the severe environment in winter and in the long-distance transportation process. Therefore, the development of alkali-free accelerator pulverization is an important condition for reducing transportation cost and popularizing the wide use of alkali-free accelerators in China and all over the world.
CN102976648A discloses a chlorine-free low-alkali powder accelerator, wherein the powder accelerator comprises aluminum sulfate and sodium metaaluminate and/or sodium fluoride, with or without other components; the low-alkali type refers to that no additional alkali is included in the accelerating agent. However, the low-alkali powder accelerator has poor water solubility, cannot be constructed by a wet spraying process, and is only suitable for a dry spraying method, but the dry spraying method has the problems of large rebound quantity, severe operating environment, difficult control of water-cement ratio, uneven concrete quality and the like, and the low-alkali powder accelerator uses a large amount of sodium metaaluminate and/or sodium fluoride, the alkali content of the low-alkali powder accelerator is far more than 1%, and the low-alkali powder accelerator still has the risk of alkali aggregate reaction with active aggregates in concrete, so that the durability of the concrete is influenced.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a novel powder alkali-free setting accelerator which can reduce the storage and transportation cost in severe environment and long-distance transportation process, has good water solubility, convenient use and good use effect, and the liquid alkali-free setting accelerator prepared by mixing and dissolving the powder alkali-free setting accelerator and water has the characteristics of low mixing amount, quick setting, high early strength and high later strength retention rate and the like.
The invention provides a powder alkali-free accelerator, which comprises the raw materials of aluminum sulfate, magnesium fluosilicate, an adsorbent, alcohol amine, an early strength agent, a stabilizer and an optional neutralizer, wherein the water content of the powder alkali-free accelerator is not more than 2 wt%.
According to some embodiments of the alkali-free powder accelerator of the present invention, preferably, the alkali-free powder accelerator comprises: 650-850 parts of aluminum sulfate, 25-70 parts of magnesium fluosilicate, 20-50 parts of adsorbent, 40-100 parts of alcohol amine, 30-80 parts of early strength agent, 15-25 parts of stabilizer and 0-25 parts of neutralizer.
According to some embodiments of the powder alkali-free accelerator of the present invention, preferably, the aluminum sulfate is industrial aluminum sulfate and the molecular formula is Al2(SO4)3·18H2O, and Al2O3The content is not less than 15.6 wt%.
According to some embodiments of the powder alkali-free accelerator, the particle size of the aluminum sulfate is preferably not less than 20 meshes, and more preferably, the particle size of the aluminum sulfate is 20-3000 meshes.
According to some embodiments of the powder alkali-free accelerator of the invention, preferably, the molecular formula of the magnesium fluosilicate is MgSiF6·6H2O, the particle size of the magnesium fluosilicate is more than or equal to 50 meshes, and more preferably, the particle size of the magnesium fluosilicate is 50-3000 meshes.
According to some embodiments of the alkali-free accelerator powder according to the present invention, preferably, the adsorbent is at least one selected from zeolite powder, activated alumina, and calcium silicate.
According to some embodiments of the alkali-free powder accelerator, the particle size of the adsorbent is preferably not less than 1000 meshes, and the particle size of the adsorbent is preferably 1000-5000 meshes.
According to some embodiments of the powder alkali-free accelerator of the present invention, preferably, the alcohol amine is at least one selected from the group consisting of ethanolamine, diethanolamine, triethanolamine, diisopropanolamine, triisopropanolamine, and diethanolisopropanolamine.
According to some embodiments of the alkali-free powder accelerator, the early strength agent is at least one selected from magnesium sulfate, magnesium sulfate hydrate, lithium sulfate hydrate, ferric sulfate and ferric sulfate hydrate.
According to some embodiments of the alkali-free powder accelerator of the present invention, preferably, the stabilizer is at least one selected from the group consisting of magnesium aluminum silicate, aqueous organobentonite, and alumina sol.
According to some embodiments of the alkali-free powder accelerator of the present invention, preferably, the neutralizing agent is magnesium oxide and/or magnesium hydroxide.
According to some embodiments of the alkali-free powder accelerator, the particle size of the neutralizing agent is preferably not less than 325 meshes, and the particle size of the neutralizing agent is preferably 325 to 3000 meshes.
In the present invention, aluminum sulfate, magnesium fluorosilicate, adsorbent, alcohol amine, early strength agent, stabilizer, and neutralizer are all commercially available.
The second aspect of the present invention provides a preparation method of the alkali-free powder accelerator, including:
step 1, performing first mixing on an adsorbent and alcohol amine to obtain a primary material;
and 2, carrying out second mixing on the primary material, aluminum sulfate, magnesium fluosilicate, an early strength agent, a stabilizer and an optional neutralizing agent.
According to some embodiments of the preparation method of the present invention, preferably, the feeding time of the alcohol amine is 15 to 45 min.
According to some embodiments of the preparation method of the present invention, preferably, the time of the first mixing is 30 to 45 min.
According to some embodiments of the preparation method of the present invention, preferably, the second mixing time is 30 to 60 min.
According to some embodiments of the method of manufacturing of the present invention, the method of manufacturing comprises:
step 1, adding an adsorbent into a vertical double-helix conical mixer, and slowly injecting alcohol amine into a feed port, wherein the feeding time of the alcohol amine is controlled to be 15-45 min; mixing and stirring the adsorbent and the alcohol amine for 30-45 min to obtain a primary material;
and 2, putting aluminum sulfate, magnesium fluosilicate, an early strength agent, a stabilizer and an optional neutralizer into a mixer to be mixed with the initial material, and mixing and stirring for 30-60 min to uniformly mix the materials to obtain the powder alkali-free accelerator.
The third aspect of the present invention provides a method for using the above alkali-free powder accelerator and/or the alkali-free powder accelerator obtained by the above preparation method, comprising: mixing the powder alkali-free setting accelerator with water in a weight ratio of (6-7) to (4-3).
The invention provides the application of the powder alkali-free quick-setting admixture and/or the powder alkali-free quick-setting admixture obtained by the preparation method in the field of concrete. Such as but not limited to, applications in the fields of tunnel construction, coal mine reinforcement, urban road and waterproofing works repair.
Compared with the prior art, the invention has the beneficial effects that:
(1) the powder alkali-free accelerator provided by the invention solves the problems that the conventional liquid alkali-free accelerator is easy to freeze and crystallize and difficult to store in severe environments such as severe cold, and the like, and reduces the packaging cost of products and the construction and long-distance transportation cost in remote areas.
(2) The alkali-free powder accelerator provided by the invention is convenient to use, can be used for sprayed concrete construction after being stirred and dissolved by a certain mass ratio with water, can meet the standard requirements of GB/T35159 and 2017 standards, has excellent accelerating effect on sprayed concrete, can effectively shorten the initial and final setting time of the concrete, and improves the early strength and the later strength;
(3) the powder alkali-free accelerator provided by the invention has the advantages of simple preparation process, strong operability and low production cost, and is suitable for industrial mass production.
Detailed Description
In order that the present invention may be more readily understood, the following detailed description of the invention is given by way of example only, and is not intended to limit the scope of the invention.
In the following examples and comparative examples,
industrial aluminum sulfate is purchased from Jiangxi Laiwei New Material Co., Ltd, product model JW-37, Al2O3The content is 16 percent, and the grain diameter is 50 meshes.
The magnesium fluosilicate is purchased from environmental protection science and technology corporation of fluorine industry of Yunnan, the grain size is 100 meshes, and the content of the magnesium fluosilicate is more than or equal to 98 percent.
The water-based organic bentonite is purchased from Guangzhou Yifeng chemical technology Limited, Yuejiang brand, and the brand number is TY-188B.
[ example 1 ]
An alkali-free powder accelerator comprises 750 parts by weight of industrial aluminum sulfate, 40 parts by weight of magnesium fluosilicate, 30 parts by weight of 3000-mesh zeolite powder, 70 parts by weight of diethanolamine, 15 parts by weight of triisopropanolamine, 65 parts by weight of magnesium sulfate heptahydrate, 20 parts by weight of aqueous organic bentonite and 10 parts by weight of heavy magnesium oxide.
Example 1 a method for preparing a powdered alkali-free accelerator comprises the following steps:
(1) adding zeolite powder into a vertical double-helix conical mixer, and slowly injecting a diethanolamine solution and a triethanolamine solution at a feed inlet for 30 min; mixing the two materials, and stirring for 30 min;
(2) and putting aluminum sulfate, magnesium fluosilicate, an early strength agent, a stabilizer and a neutralizing agent into a mixer, mixing and stirring for 45min to uniformly mix the materials to obtain the powdery alkali-free accelerator. No water is added in the preparation process, and the water content is not more than 2 wt%.
The use method of the powder alkali-free accelerator comprises the following steps: stirring and dissolving the obtained powder alkali-free accelerator and water according to the mass ratio of 700:300, and numbering AF-01.
[ example 2 ]
An alkali-free powder accelerator comprises 800 parts by weight of industrial aluminum sulfate, 50 parts by weight of magnesium fluosilicate, 20 parts by weight of 5000-mesh zeolite powder, 60 parts by weight of diethanolamine, 35 parts by weight of anhydrous magnesium sulfate, 20 parts by weight of magnesium aluminum silicate and 15 parts by weight of magnesium hydroxide. The preparation method is the same as that of example 1. Obtaining the powder alkali-free accelerator. No water is added in the preparation process, and the water content is not more than 2 wt%.
The use method of the powder alkali-free accelerator comprises the following steps: stirring and dissolving the obtained powder alkali-free accelerator and water according to the mass ratio of 650:350, and numbering AF-02.
[ example 3 ]
An alkali-free powder accelerator comprises 780 parts by weight of industrial aluminum sulfate, 35 parts by weight of magnesium fluosilicate, 30 parts by weight of 5000-mesh zeolite powder, 90 parts by weight of diethanolamine, 40 parts by weight of anhydrous magnesium sulfate and 25 parts by weight of magnesium aluminum silicate. The preparation method is the same as that of example 1. Obtaining the powder alkali-free accelerator. No water is added in the preparation process, and the water content is not more than 2 wt%.
The use method of the powder alkali-free accelerator comprises the following steps: stirring and dissolving the obtained powder alkali-free accelerator and water according to the mass ratio of 600:400, and numbering AF-03.
[ example 4 ]
An alkali-free powder accelerator, which is basically the same as that in example 1, except that: the magnesium sulfate heptahydrate 65 parts by weight was replaced with magnesium sulfate heptahydrate 50 parts by weight and lithium sulfate monohydrate 15 parts by weight. The rest materials and the preparation method are the same as those of the example 1, and the powder alkali-free accelerator is obtained. No water is added in the preparation process, and the water content is not more than 2 wt%.
The use method of the powder alkali-free accelerator comprises the following steps: stirring and dissolving the obtained powder alkali-free accelerator and water according to the mass ratio of 700:300, wherein the powder alkali-free accelerator is numbered AF-04.
[ example 5 ]
An alkali-free powder accelerator, which is basically the same as that in example 2, except that: 60 parts by weight of diethanolamine is replaced by 40 parts of diethanolamine and 20 parts of triethanolamine, and the rest materials and the preparation method are the same as those in the example 2, so that the powder alkali-free accelerator is obtained. No water is added in the preparation process, and the water content is not more than 2 wt%.
The use method of the powder alkali-free accelerator comprises the following steps: stirring and dissolving the obtained powder alkali-free accelerator and water according to the mass ratio of 650:350, and numbering AF-05.
[ example 6 ]
An alkali-free powder accelerator, which is basically the same as that in example 1, except that: the 3000-mesh zeolite powder is replaced by 3000-mesh activated alumina. The rest materials and the preparation method are the same as those of the example 1, and the powder alkali-free accelerator is obtained. No water is added in the preparation process, and the water content is not more than 2 wt%.
The use method of the powder alkali-free accelerator comprises the following steps: stirring and dissolving the obtained powder alkali-free accelerator and water according to the mass ratio of 700:300, and numbering AF-06.
Comparative example 1
A liquid alkali-free accelerator commercially available from Jiangsu company, model SL-15, is a creamy yellow suspension, and has a solid content of 52.5%, a pH value of 2.3, an alkali content of 0.3 wt% and a chloride ion content of 0.05 wt%.
Comparative example 2
A liquid alkali-free accelerator commercially available from Shanxi company, model AJ-1, is a light yellow liquid, and contains 45% of solid, 2.8 of pH value, 0.5% of alkali and 0.06% of chloride ions.
Comparative example 3
An alkali-free powder accelerator, which is basically the same as that in example 2, except that: magnesium fluosilicate is not used. The method specifically comprises the following steps:
an alkali-free powder accelerator comprises 800 parts by weight of industrial aluminum sulfate, 20 parts by weight of 5000-mesh zeolite powder, 60 parts by weight of diethanolamine, 35 parts by weight of anhydrous magnesium sulfate, 20 parts by weight of magnesium aluminum silicate and 15 parts by weight of magnesium hydroxide.
The use method of the powder alkali-free accelerator comprises the following steps: stirring and dissolving the obtained powder alkali-free accelerator and water according to the mass ratio of 650:350, and numbering D-03.
Comparative example 4
An alkali-free powder accelerator, which is basically the same as that in example 2, except that: adsorbent and alcohol amine were not used. The method specifically comprises the following steps:
800 parts of industrial aluminum sulfate, 50 parts of magnesium fluosilicate, 35 parts of anhydrous magnesium sulfate, 20 parts of magnesium aluminum silicate and 15 parts of magnesium hydroxide.
The use method of the powder alkali-free accelerator comprises the following steps: stirring and dissolving the obtained powder alkali-free accelerator and water according to the mass ratio of 650:350, and numbering D-04.
Comparative example 5
An alkali-free powder accelerator, which is basically the same as that in example 2, except that: no early strength agent is used.
The method specifically comprises the following steps:
800 parts of industrial aluminum sulfate, 50 parts of magnesium fluosilicate, 20 parts of 5000-mesh zeolite powder, 60 parts of diethanolamine, 20 parts of magnesium aluminum silicate and 15 parts of magnesium hydroxide.
The use method of the powder alkali-free accelerator comprises the following steps: stirring and dissolving the obtained powder alkali-free accelerator and water according to the mass ratio of 650:350, and numbering D-05.
According to the test method of the relevant items in the GB/T35159-2017 accelerator for sprayed concrete standard, the liquid alkali-free accelerators AF-01-AF-06 obtained by dissolving the powder alkali-free accelerators prepared in the embodiments 1-6 in water and the liquid alkali-free accelerators of the comparative examples 1-5 are subjected to cement paste setting time and cement mortar compressive strength tests, and the test results are shown in the table 1.
TABLE 1
As can be seen from the data in Table 1, the liquid alkali-free setting accelerators AF-01-AF-06 obtained after the powder alkali-free setting accelerators prepared in the embodiments 1-6 and water are dissolved according to a certain mass ratio meet the standard requirements of GB/T35159-2017 accelerator for sprayed concrete, the performances of the liquid alkali-free setting accelerators are basically equivalent to those of comparative example 1 and comparative example 2 sold in the market, and the powder alkali-free setting accelerator can reduce the storage and transportation cost in severe environment and long-distance transportation process. Compared with the powder alkali-free setting accelerators D-03-D-05 obtained in comparative examples 3-5, the powder alkali-free setting accelerators (examples 1-6) provided by the invention have the characteristics of lower mixing amount, more excellent setting accelerating effect, high early strength, basically no loss of later strength and the like due to the synergistic effect among the raw materials. The stability and the product performance of the liquid alkali-free quick-setting agent obtained after dissolution are comprehensively considered, and the prepared powder alkali-free quick-setting agent is preferably dissolved and used with water according to the mass ratio of 650-700 to 350-300.
What has been described above is merely a preferred example of the present invention. It should be noted that other equivalent variations and modifications can be made by those skilled in the art based on the technical teaching provided by the present invention, and the protection scope of the present invention should be considered.
Claims (10)
1. The powder alkali-free accelerator comprises the raw materials of aluminum sulfate, magnesium fluosilicate, an adsorbent, alcohol amine, an early strength agent, a stabilizer and an optional neutralizer, wherein the water content of the powder alkali-free accelerator is not more than 2 wt%.
2. The alkali-free powder accelerator according to claim 1, comprising: 650-850 parts of aluminum sulfate, 25-70 parts of magnesium fluosilicate, 20-50 parts of adsorbent, 40-100 parts of alcohol amine, 30-80 parts of early strength agent, 15-25 parts of stabilizer and 0-25 parts of neutralizer.
3. The powder alkali-free accelerator according to claim 1 or 2, wherein the aluminum sulfate is industrial aluminum sulfate, and Al is aluminum sulfate2O3The content is not less than 15.6 wt%; and/or the presence of a gas in the gas,
the particle size of the aluminum sulfate is more than or equal to 20 meshes, and preferably, the particle size of the aluminum sulfate is 20-3000 meshes.
4. The powder alkali-free accelerator as claimed in claim 1 or 2, wherein the particle size of the magnesium fluosilicate is not less than 50 meshes, preferably, the particle size of the magnesium fluosilicate is 50-3000 meshes.
5. The alkali-free powder accelerator according to claim 1 or 2, wherein the adsorbent is at least one selected from zeolite powder, activated alumina and calcium silicate; and/or the presence of a gas in the gas,
the particle size of the adsorbent is more than or equal to 1000 meshes, and preferably, the particle size of the adsorbent is 1000-5000 meshes.
6. The powder alkali-free accelerator according to claim 1 or 2, wherein the alcohol amine is at least one selected from the group consisting of ethanolamine, diethanolamine, triethanolamine, diisopropanolamine, triisopropanolamine and diethanolisopropanolamine; and/or the presence of a gas in the gas,
the early strength agent is selected from at least one of magnesium sulfate, magnesium sulfate hydrate, lithium sulfate hydrate, ferric sulfate and ferric sulfate hydrate; and/or the presence of a gas in the gas,
the stabilizer is selected from at least one of magnesium aluminum silicate, aqueous organic bentonite and aluminum sol; and/or the presence of a gas in the gas,
the neutralizer is magnesium oxide and/or magnesium hydroxide; and/or the particle size of the neutralizing agent is not less than 325 meshes, preferably, the particle size of the neutralizing agent is 325-3000 meshes.
7. A method for preparing the powder alkali-free accelerator of any one of claims 1 to 6, comprising:
step 1, performing first mixing on an adsorbent and alcohol amine to obtain a primary material;
and 2, carrying out second mixing on the primary material, aluminum sulfate, magnesium fluosilicate, an early strength agent, a stabilizer and an optional neutralizing agent.
8. The preparation method according to claim 7, characterized in that the charging time of the alcohol amine is 15-45 min; and/or the presence of a gas in the gas,
the first mixing time is 30-45 min;
the second mixing time is 30-60 min.
9. A method for using the alkali-free powder accelerator of any one of claims 1 to 6 and/or the alkali-free powder accelerator obtained by the preparation method of claim 7 or 8, comprising: mixing the powder alkali-free setting accelerator with water in a weight ratio of (6-7) to (4-3).
10. Use of the alkali-free powder accelerator according to any one of claims 1 to 6 and/or the alkali-free powder accelerator obtained by the preparation method according to claim 7 or 8 in the field of concrete.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113912321A (en) * | 2021-09-13 | 2022-01-11 | 山西佳维新材料股份有限公司 | Coordination activator, liquid alkali-free accelerator and preparation method and application thereof |
| CN114014582A (en) * | 2021-11-08 | 2022-02-08 | 北京市建筑工程研究院有限责任公司 | Chlorine-free, fluorine-free and alkali-free liquid accelerator and preparation method and application thereof |
| CN117263559A (en) * | 2023-09-15 | 2023-12-22 | 石家庄市长安育才建材有限公司 | Powdery alkali-free accelerator for sprayed concrete in alpine region and preparation method thereof |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1972603A2 (en) * | 2007-02-27 | 2008-09-24 | Industrias Quimicas del Ebro, S.A. | Method of preparation of a solid setting accelerant product, product obtained and use thereof |
| CN101423356A (en) * | 2008-11-20 | 2009-05-06 | 同济大学 | Environment-friendly type alkali-free liquid accelerator for sprayed concrete and preparation method thereof |
| CN102923988A (en) * | 2012-11-29 | 2013-02-13 | 北京冶建特种材料有限公司 | Liquid alkali-free chloride-free accelerating agent as well as methods for preparing and using same |
| CN110204238A (en) * | 2019-06-12 | 2019-09-06 | 云南凯威特新材料股份有限公司 | A kind of water-soluble powdery alkali-free quick-coagulant and preparation method thereof |
| CN110627397A (en) * | 2019-08-28 | 2019-12-31 | 四川琪汇新材料有限责任公司 | High-strength alkali-free liquid accelerator, preparation method and application thereof |
| CN110963741A (en) * | 2019-12-27 | 2020-04-07 | 芜湖弘马新材料有限公司 | Early-strength powdery alkali-free liquid accelerator core master batch and preparation method and application thereof |
| CN111153619A (en) * | 2020-01-14 | 2020-05-15 | 攀枝花市吉源科技有限责任公司 | Non-hazardous chemical substance alkali-free accelerator of magnesium aluminum fluoride system and preparation method thereof |
| CN111333362A (en) * | 2020-03-10 | 2020-06-26 | 刘翠芬 | Low-dosage high-early-strength alkali-free liquid accelerator and preparation method thereof |
| CN111592262A (en) * | 2020-06-10 | 2020-08-28 | 山西黄腾化工有限公司 | Concrete liquid accelerator |
| CN112142359A (en) * | 2020-09-25 | 2020-12-29 | 福泉凯威特新材料有限公司 | Dry and wet spraying concrete dual-purpose powdery alkali-free accelerator and preparation and use methods thereof |
| CN112876126A (en) * | 2021-04-14 | 2021-06-01 | 石家庄市长安育才建材有限公司 | Powder instant alkali-free accelerator and preparation method thereof |
| CN113024147A (en) * | 2021-03-24 | 2021-06-25 | 武汉源锦建材科技有限公司 | Alkali-free powdery accelerator for sprayed concrete and preparation method thereof |
-
2021
- 2021-06-28 CN CN202110721344.1A patent/CN113264711A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1972603A2 (en) * | 2007-02-27 | 2008-09-24 | Industrias Quimicas del Ebro, S.A. | Method of preparation of a solid setting accelerant product, product obtained and use thereof |
| CN101423356A (en) * | 2008-11-20 | 2009-05-06 | 同济大学 | Environment-friendly type alkali-free liquid accelerator for sprayed concrete and preparation method thereof |
| CN102923988A (en) * | 2012-11-29 | 2013-02-13 | 北京冶建特种材料有限公司 | Liquid alkali-free chloride-free accelerating agent as well as methods for preparing and using same |
| CN110204238A (en) * | 2019-06-12 | 2019-09-06 | 云南凯威特新材料股份有限公司 | A kind of water-soluble powdery alkali-free quick-coagulant and preparation method thereof |
| CN110627397A (en) * | 2019-08-28 | 2019-12-31 | 四川琪汇新材料有限责任公司 | High-strength alkali-free liquid accelerator, preparation method and application thereof |
| CN110963741A (en) * | 2019-12-27 | 2020-04-07 | 芜湖弘马新材料有限公司 | Early-strength powdery alkali-free liquid accelerator core master batch and preparation method and application thereof |
| CN111153619A (en) * | 2020-01-14 | 2020-05-15 | 攀枝花市吉源科技有限责任公司 | Non-hazardous chemical substance alkali-free accelerator of magnesium aluminum fluoride system and preparation method thereof |
| CN111333362A (en) * | 2020-03-10 | 2020-06-26 | 刘翠芬 | Low-dosage high-early-strength alkali-free liquid accelerator and preparation method thereof |
| CN111592262A (en) * | 2020-06-10 | 2020-08-28 | 山西黄腾化工有限公司 | Concrete liquid accelerator |
| CN112142359A (en) * | 2020-09-25 | 2020-12-29 | 福泉凯威特新材料有限公司 | Dry and wet spraying concrete dual-purpose powdery alkali-free accelerator and preparation and use methods thereof |
| CN113024147A (en) * | 2021-03-24 | 2021-06-25 | 武汉源锦建材科技有限公司 | Alkali-free powdery accelerator for sprayed concrete and preparation method thereof |
| CN112876126A (en) * | 2021-04-14 | 2021-06-01 | 石家庄市长安育才建材有限公司 | Powder instant alkali-free accelerator and preparation method thereof |
Non-Patent Citations (3)
| Title |
|---|
| 何廷树等: "《混凝土外加剂》", 30 April 2003, 陕西科学技术出版社 * |
| 张文富等: "《化工小产品实用技术》", 28 February 1992, 天津科学技术出版社 * |
| 陈群玉等: "《水污染控制工程》", 30 June 2018, 中央民族大学出版社 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113912321A (en) * | 2021-09-13 | 2022-01-11 | 山西佳维新材料股份有限公司 | Coordination activator, liquid alkali-free accelerator and preparation method and application thereof |
| CN113912321B (en) * | 2021-09-13 | 2022-09-02 | 山西佳维新材料股份有限公司 | Coordination activator, liquid alkali-free accelerator and preparation method and application thereof |
| CN114014582A (en) * | 2021-11-08 | 2022-02-08 | 北京市建筑工程研究院有限责任公司 | Chlorine-free, fluorine-free and alkali-free liquid accelerator and preparation method and application thereof |
| CN114014582B (en) * | 2021-11-08 | 2022-09-06 | 北京市建筑工程研究院有限责任公司 | Chlorine-free, fluorine-free and alkali-free liquid accelerator and preparation method and application thereof |
| CN117263559A (en) * | 2023-09-15 | 2023-12-22 | 石家庄市长安育才建材有限公司 | Powdery alkali-free accelerator for sprayed concrete in alpine region and preparation method thereof |
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