CN115385597A - Accelerating agent for sprayed concrete in high-heat area and preparation and use methods thereof - Google Patents
Accelerating agent for sprayed concrete in high-heat area and preparation and use methods thereof Download PDFInfo
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- CN115385597A CN115385597A CN202211047587.2A CN202211047587A CN115385597A CN 115385597 A CN115385597 A CN 115385597A CN 202211047587 A CN202211047587 A CN 202211047587A CN 115385597 A CN115385597 A CN 115385597A
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- accelerator
- parts
- expanding agent
- sprayed concrete
- aluminum sulfate
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- 239000011378 shotcrete Substances 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000002360 preparation method Methods 0.000 title abstract description 9
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 48
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 38
- 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 25
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 24
- 229920001529 polyepoxysuccinic acid Polymers 0.000 claims abstract description 23
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000000292 calcium oxide Substances 0.000 claims abstract description 12
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 12
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 12
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000003822 epoxy resin Substances 0.000 claims abstract description 11
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 11
- 239000004814 polyurethane Substances 0.000 claims abstract description 11
- 229920002635 polyurethane Polymers 0.000 claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims description 19
- 238000002156 mixing Methods 0.000 claims description 19
- 238000010008 shearing Methods 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000003112 inhibitor Substances 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims 1
- 238000006703 hydration reaction Methods 0.000 abstract description 25
- 230000036571 hydration Effects 0.000 abstract description 20
- 239000011435 rock Substances 0.000 abstract description 7
- 239000011148 porous material Substances 0.000 abstract description 3
- 239000002002 slurry Substances 0.000 abstract description 3
- 239000000047 product Substances 0.000 description 13
- 239000004568 cement Substances 0.000 description 7
- 239000000203 mixture Substances 0.000 description 6
- 239000004567 concrete Substances 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 125000003700 epoxy group Chemical group 0.000 description 3
- 229920000058 polyacrylate Polymers 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 229920001732 Lignosulfonate Polymers 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 235000019357 lignosulphonate Nutrition 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910052604 silicate mineral Inorganic materials 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention provides an accelerator for sprayed concrete in high-heat regions and a preparation method and a use method thereof, wherein the accelerator comprises the following components in parts by weight: 40-60 parts of polyepoxysuccinic acid, 16-28 parts of aluminum sulfate, 10-14 parts of calcium carbonate and 5-8 parts of an expanding agent; the expanding agent is prepared from the following components in a mass ratio of 1-2:3-5 of calcium oxide and magnesium oxide. The invention combines the polyepoxysuccinic acid, the aluminum sulfate, the calcium carbonate, the expanding agent and the epoxy resin modified waterborne polyurethane with specific proportions, and the components are mutually cooperated, so that the hydration product has enough time and space to be effectively precipitated into pores, the porosity of the sprayed concrete in the high-temperature curing period is reduced, the compactness of hardened slurry is improved, the middle and later stage strength of the sprayed concrete at high temperature can be effectively improved, the rebound rate of the sprayed concrete is reduced, and the bonding strength of surrounding rocks is enhanced.
Description
Technical Field
The invention relates to the technical field of concrete additives, in particular to an accelerator for sprayed concrete in high-heat regions and a preparation method and a use method thereof.
Background
In recent years, the development of tunnel construction in basic traffic such as railways, urban subways and highways is rapid, particularly, the construction in western regions has complex terrains and zones, and particularly, the mechanical property of the sprayed concrete is obviously influenced by the surrounding rock temperature rise caused by high geothermal energy. Although high geothermal heat can accelerate the hydration reaction rate during the early curing stage of shotcrete, if the high geothermal heat is too high, the thermal movement of the hydration product is accelerated, and the hydration product is liable to be deposited. Meanwhile, the texture of the hydration product is loose, which easily causes the strength reduction of the sprayed concrete in the middle and later periods, and further influences the long-term performance of the sprayed concrete.
Researches show that the use of the accelerator can accelerate the early hydration process of cement paste, promote the setting and hardening of sprayed concrete, inhibit the hydration of silicate minerals, reduce the compactness of hardened paste and further reduce the strength of the sprayed concrete in the middle and later periods. Therefore, the accelerator is applied in a high-temperature environment, but the strength of the sprayed concrete in the middle and later periods is reduced, and the requirement of quick and effective tunnel construction cannot be met.
Disclosure of Invention
In view of the above, the invention aims to provide an accelerator for sprayed concrete in high-heat regions and a preparation method and a use method thereof, so as to solve the problem of poor performance of the sprayed concrete in a high-temperature environment.
The technical scheme of the invention is realized as follows:
an accelerator for shotcrete in high-heat regions, the accelerator comprising an inhibitor; the inhibitor is polyepoxysuccinic acid.
The accelerator further comprises aluminum sulfate, calcium carbonate and an expanding agent; the expanding agent consists of calcium oxide and magnesium oxide.
The further scheme is that the formula of the accelerator comprises the following components in parts by weight: 40-60 parts of polyepoxysuccinic acid, 16-28 parts of aluminum sulfate, 10-14 parts of calcium carbonate and 5-8 parts of an expanding agent; the expanding agent is prepared from the following components in a mass ratio of 1-2:3-5 of calcium oxide and magnesium oxide.
The further proposal is that the weight portion of the polyepoxysuccinic acid is 40 to 50 portions, the aluminum sulfate is 16 to 20 portions, the calcium carbonate is 10 to 12 portions and the expanding agent is 5 to 8 portions.
The preparation method of the accelerator comprises the following steps: mixing aluminum sulfate, calcium carbonate and 2 times of water by weight, heating and blending, adding an expanding agent and polyepoxysuccinic acid, heating, shearing and blending to obtain the accelerator.
In a further scheme, the heating and blending temperature is 60-70 ℃, and the time is 1-2h.
In a further scheme, the heating, shearing and blending is to carry out heating and heat preservation for 30-50min at 50-60 ℃ and then shear for 1-3h at 60-70 ℃.
In a further aspect, the shear rate is from 2000 to 4000r/min.
Further, the mass ratio of the accelerator to the sprayed concrete is 0.05-0.1:1.
the application method of the accelerator is characterized in that the accelerator is mixed with sprayed concrete, and the epoxy resin modified waterborne polyurethane with the weight of 0.03-0.04% of the mixed system is added.
Compared with the prior art, the invention has the following beneficial effects:
the accelerating agent disclosed by the invention selects polyepoxysuccinic acid as an inhibitor, can be combined with epoxy groups in epoxy resin modified waterborne polyurethane, can form a protective film on the surface of a hydration product, reduces the deposition speed of the hydration product in a high-temperature environment, and enables the hydration product to be uniformly distributed.
The invention combines the polyepoxysuccinic acid, the aluminum sulfate, the calcium carbonate, the expanding agent and the epoxy resin modified waterborne polyurethane with specific proportions, and the components are mutually cooperated, so that the hydration product has enough time and space to be effectively precipitated into pores, the porosity of the sprayed concrete in the high-temperature curing period is reduced, the compactness of hardened slurry is improved, the middle and later stage strength of the sprayed concrete at high temperature can be effectively improved, the rebound rate of the sprayed concrete is reduced, and the bonding strength of surrounding rocks is enhanced.
The experiment of the invention shows that the total heat quantity of heat release of 24h accumulated hydration is 173-185 W.h -1 And the 28d sprayed concrete has the compression strength of 54.4-56.2MPa, the rebound resilience of 5.5-5.8 percent, the porosity of 0.10-0.11 and the surrounding rock bonding strength of 0.26-0.29MPa.
Detailed Description
In order to better understand the technical content of the invention, specific examples are provided below to further illustrate the invention.
The experimental methods used in the examples of the present invention are all conventional methods unless otherwise specified.
The materials, reagents and the like used in the examples of the present invention can be obtained commercially without specific description.
The performance detection method comprises the following steps:
according to a cement hydration heat determination method (GB/T12959-2008), the hydration heat release heat of the mixture when the accelerator is added is determined, the total heat of hydration heat release accumulated for 24 hours is recorded, and the test temperature is set to be 30 +/-2 ℃;
and (3) determining the rebound rate of the sprayed concrete: selecting a wall surface, horizontally spraying concrete with a certain weight, collecting the mixture falling on the ground, wherein the spraying thickness is 70-80mm, and the rebound rate (%) = the weight of the mixture which is not bonded on the wall surface/the total sprayed mixture weight is multiplied by 100.
And (3) measuring the bonding strength of the surrounding rock: according to the technical specification of sprayed concrete application (JGJT 372-2016), a core drilling and drawing mode is adopted for sampling, the diameter of a sampling test piece is 50-60mm at the position of a core drill 3 in the measuring area range of the same surrounding rock, the core drill depth is at least 20mm, and the distance from the core drill to the structure edge is not less than 150mm.
And (3) measuring the mechanical property of the sprayed concrete: according to the acceptance criteria of construction quality of concrete structure engineering (GB 50204-2015), the compressive strength of concrete samples sampled by the drill core in the curing period of 1d and 28d is determined, and the temperature in the curing period is set to be 60 +/-5 ℃.
And (3) porosity determination: the porosity of the concrete test piece was determined at 28d using mercury intrusion method.
A commercially available alkali-free liquid accelerator based on aluminum sulfate was used as a control.
Example 1
The accelerator for the sprayed concrete in the high-heat area comprises the following components in percentage by weight: 40kg of polyepoxysuccinic acid, 16kg of aluminum sulfate, 10kg of calcium carbonate and 5kg of expanding agent, wherein the expanding agent is prepared from the following components in percentage by mass of 2:5 calcium oxide and magnesium oxide.
Example 2
The accelerator for the sprayed concrete in the high-heat area comprises the following components in percentage by weight: 60kg of polyepoxysuccinic acid, 28kg of aluminum sulfate, 14kg of calcium carbonate and 8kg of expanding agent, wherein the expanding agent is prepared from the following components in percentage by mass of 1:3 calcium oxide and magnesium oxide.
Example 3
The accelerator for the sprayed concrete in the high-heat area comprises the following components in percentage by weight: 50kg of polyepoxysuccinic acid, 20kg of aluminum sulfate, 12kg of calcium carbonate and 7kg of expanding agent, wherein the expanding agent is prepared from the following components in percentage by mass of 2:3 calcium oxide and magnesium oxide.
Example 4
The accelerator for the sprayed concrete in the high-heat area comprises the following components in percentage by weight: 43kg of polyepoxysuccinic acid, 18kg of aluminum sulfate, 11kg of calcium carbonate and 6kg of expanding agent, wherein the expanding agent is prepared from the following components in percentage by mass of 2:3 calcium oxide and magnesium oxide.
The preparation method of the accelerating agent of the embodiment 1-4 comprises the following steps: mixing aluminum sulfate, calcium carbonate and 2 times of water by weight, heating and blending at 65 ℃ for 2 hours, adding an expanding agent and polyepoxysuccinic acid, heating and preserving heat at 55 ℃ for 40 minutes, shearing at 65 ℃ for 2 hours at a shearing rate of 3000r/min, and heating, shearing and blending to obtain the accelerator.
According to the mass ratio of the accelerator to the sprayed concrete of 0.08:1, adding the mixture into the sprayed concrete, and adding 0.03 percent of epoxy resin modified waterborne polyurethane based on the weight of the mixed system.
Example 5
The difference from the example 4 is that the epoxy resin modified waterborne polyurethane is replaced by polyacrylate, which specifically comprises the following steps:
the formula of the accelerator comprises: 43kg of polyepoxysuccinic acid, 18kg of aluminum sulfate, 11kg of calcium carbonate and 6kg of expanding agent, wherein the expanding agent is prepared from the following components in percentage by mass of 2:3 calcium oxide and magnesium oxide.
The preparation method of the accelerator comprises the following steps: mixing aluminum sulfate, calcium carbonate and 2 times of water by weight, heating and blending at 65 ℃ for 2h, adding an expanding agent and polyepoxysuccinic acid, heating and preserving heat at 55 ℃ for 40min, shearing at 65 ℃ for 2h at a shearing rate of 3000r/min, and heating, shearing and blending to obtain the accelerator.
According to the mass ratio of the accelerator to the sprayed concrete of 0.08:1, adding to the shotcrete and adding 0.03% by weight of polyacrylate based on the weight of the mixed system.
Comparative example 1
The difference from the example 4 is that polyepoxysuccinic acid is replaced by lignin sulfonate, and the formula of the accelerator is as follows: 43kg of sulfonated lignin, 18kg of aluminum sulfate, 11kg of calcium carbonate and 6kg of an expanding agent, wherein the expanding agent is prepared from the following components in percentage by mass: 3 calcium oxide and magnesium oxide.
The preparation method of the accelerator comprises the following steps: mixing aluminum sulfate, calcium carbonate and 2 times of water by weight, heating and blending at 65 ℃ for 2 hours, adding an expanding agent, heating and preserving heat at 55 ℃ for 40min, shearing at 65 ℃ for 2 hours at a shearing rate of 3000r/min, and heating, shearing and blending to obtain the accelerator.
According to the mass ratio of the accelerator to the sprayed concrete of 0.08:1, adding the mixture into the sprayed concrete, and adding epoxy resin modified waterborne polyurethane accounting for 0.03 percent of the weight of the mixed system.
The experimental results of the above examples 3 to 5 and comparative example 1 are shown in the following table:
as can be seen from the above table, the total heat of 24h cumulative hydration exotherm for examples 3-5 is 173-185 W.h -1 The cement hydration reaction can be promoted by adopting the polyepoxysuccinic acid, the aluminum sulfate, the calcium carbonate and the expanding agent in a specific ratio, the 28d compressive strength is 54.4-56.2MPa, and the resilience rate is 5.5-5.8%. From example 5, it can be seen that the incorporation of polyacrylate reduces the hydration reaction process, can improve the strength of the early sprayed concrete, but has little influence on the strength of the sprayed concrete in the middle and later periods, and from the porosity, the addition of the epoxy resin modified waterborne polyurethane further promotes the compactness of the sprayed concrete, and is more beneficial to improving the strength of the sprayed concrete in the middle and later periods.
Compared with the comparative example 1 and the control group, the cement binding power of a hydrate product becomes loose under the high-temperature condition, the strength is reduced, and the diffusion of a hydration product is also uneven, the invention selects the expanding agents of calcium oxide and magnesium oxide, calcium carbonate and aluminum sulfate, the expanding agents play the roles of compensating shrinkage and filling particles among cement when the high-temperature rapid hydration reaction heat is generated, the calcium carbonate and the aluminum sulfate expand before the cement is hardened, the early-stage setting and hardening time of the cement slurry is longer, more water can be consumed, the influence of water evaporation on the hydration reaction is avoided, meanwhile, the epoxy group in the epoxy resin modified waterborne polyurethane has higher reaction activity, the epoxy group is combined with the polyepoxysuccinic acid, a protective film can be formed on the surface of the hydration product, the deposition speed of the hydration product under the high-temperature environment is reduced, the hydration product is uniformly distributed, the polyepoxysuccinic acid, the aluminum sulfate, the calcium carbonate, the expanding agent and the epoxy resin modified waterborne polyurethane are mutually cooperated, the hydration product has enough time and space to effectively precipitate into pores, the porosity of the sprayed concrete in the high-temperature period is reduced, the compactness of the sprayed concrete under the high-temperature, and the post-stage of the sprayed concrete is improved, and the surrounding rock strength is reduced.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. An accelerator for shotcrete for high-heat areas, wherein the accelerator comprises an inhibitor; the inhibitor is polyepoxysuccinic acid.
2. The accelerator according to claim 1, wherein the accelerator further comprises aluminum sulfate, calcium carbonate and an expanding agent; the expanding agent consists of calcium oxide and magnesium oxide.
3. The accelerator according to claim 2, wherein the accelerator has a formula comprising, in parts by weight: 40-60 parts of polyepoxysuccinic acid, 16-28 parts of aluminum sulfate, 10-14 parts of calcium carbonate and 5-8 parts of an expanding agent; the expanding agent is prepared from the following components in a mass ratio of 1-2:3-5 of calcium oxide and magnesium oxide.
4. The accelerator according to claim 3, characterized in that the accelerator comprises, by weight, 40-50 parts of polyepoxysuccinic acid, 16-20 parts of aluminum sulfate, 10-12 parts of calcium carbonate and 5-8 parts of an expanding agent.
5. The method for producing an accelerator according to any one of claims 1 to 4, comprising the steps of: mixing aluminum sulfate, calcium carbonate and 2 times of water by weight, heating and blending, adding an expanding agent and polyepoxysuccinic acid, heating, shearing and blending to obtain the accelerator.
6. The method for preparing the accelerator according to claim 5, wherein the temperature for heating and blending is 60-70 ℃ and the time is 1-2h.
7. The method for preparing the accelerator according to claim 5, wherein the heating and shearing blending is performed by heating and holding at 50-60 ℃ for 30-50min, and then shearing at 60-70 ℃ for 1-3h.
8. The method for preparing the accelerator according to claim 5, wherein the shear rate is 2000 to 4000r/min.
9. The use method of the accelerator according to any one of claims 1 to 4, wherein the mass ratio of the accelerator to the shotcrete is 0.05-0.1:1.
10. the use method of the accelerator according to claim 9, wherein the accelerator is mixed with shotcrete, and further comprises adding 0.03-0.04% by weight of the epoxy resin modified aqueous polyurethane based on the weight of the mixed system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211047587.2A CN115385597B (en) | 2022-08-30 | 2022-08-30 | Accelerating agent for sprayed concrete in high-heat area and preparation and use methods thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211047587.2A CN115385597B (en) | 2022-08-30 | 2022-08-30 | Accelerating agent for sprayed concrete in high-heat area and preparation and use methods thereof |
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| Publication Number | Publication Date |
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| CN115385597A true CN115385597A (en) | 2022-11-25 |
| CN115385597B CN115385597B (en) | 2023-07-18 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002053357A (en) * | 2000-08-10 | 2002-02-19 | Denki Kagaku Kogyo Kk | Quick setting agent, spraying material and spraying method using the same quick setting agent |
| CN111454013A (en) * | 2020-04-08 | 2020-07-28 | 贵州天威建材科技有限责任公司 | Stabilizer for liquid alkali-free accelerator and preparation method thereof |
| CN111825390A (en) * | 2020-06-18 | 2020-10-27 | 东莞市冠峰混凝土有限公司 | Self-curing concrete |
| CN113912357A (en) * | 2021-11-27 | 2022-01-11 | 彭江骐 | Antifreezing concrete and preparation method thereof |
-
2022
- 2022-08-30 CN CN202211047587.2A patent/CN115385597B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002053357A (en) * | 2000-08-10 | 2002-02-19 | Denki Kagaku Kogyo Kk | Quick setting agent, spraying material and spraying method using the same quick setting agent |
| CN111454013A (en) * | 2020-04-08 | 2020-07-28 | 贵州天威建材科技有限责任公司 | Stabilizer for liquid alkali-free accelerator and preparation method thereof |
| CN111825390A (en) * | 2020-06-18 | 2020-10-27 | 东莞市冠峰混凝土有限公司 | Self-curing concrete |
| CN113912357A (en) * | 2021-11-27 | 2022-01-11 | 彭江骐 | Antifreezing concrete and preparation method thereof |
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| Publication number | Publication date |
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| CN115385597B (en) | 2023-07-18 |
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Effective date of registration: 20240614 Address after: No. 488 Yingbin Avenue, Jiyang District, Sanya City, Hainan Province, 572000 Patentee after: Hainan Ruize Shuanglin building materials Co.,Ltd. Country or region after: China Address before: 570100 Xianzhai Village, Zhongyuan Town, Hainan Province Patentee before: Qionghai Xinhai Concrete Co.,Ltd. Country or region before: China |