CN116514450B - Gypsum modifier for cement production - Google Patents
Gypsum modifier for cement production Download PDFInfo
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- CN116514450B CN116514450B CN202310548832.6A CN202310548832A CN116514450B CN 116514450 B CN116514450 B CN 116514450B CN 202310548832 A CN202310548832 A CN 202310548832A CN 116514450 B CN116514450 B CN 116514450B
- Authority
- CN
- China
- Prior art keywords
- gypsum
- modifier
- phosphogypsum
- cement
- lignosulfonate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 93
- 239000010440 gypsum Substances 0.000 title claims abstract description 93
- 239000003607 modifier Substances 0.000 title claims abstract description 63
- 239000004568 cement Substances 0.000 title claims abstract description 46
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 239000002270 dispersing agent Substances 0.000 claims abstract description 8
- 239000012744 reinforcing agent Substances 0.000 claims abstract description 7
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 6
- 238000002360 preparation method Methods 0.000 claims description 15
- 229920001732 Lignosulfonate Polymers 0.000 claims description 10
- -1 alcohol amine Chemical class 0.000 claims description 8
- 239000012190 activator Substances 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 6
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 5
- SLINHMUFWFWBMU-UHFFFAOYSA-N Triisopropanolamine Chemical compound CC(O)CN(CC(C)O)CC(C)O SLINHMUFWFWBMU-UHFFFAOYSA-N 0.000 claims description 5
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 4
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 4
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 claims description 4
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 3
- 229920005551 calcium lignosulfonate Polymers 0.000 claims description 3
- RYAGRZNBULDMBW-UHFFFAOYSA-L calcium;3-(2-hydroxy-3-methoxyphenyl)-2-[2-methoxy-4-(3-sulfonatopropyl)phenoxy]propane-1-sulfonate Chemical group [Ca+2].COC1=CC=CC(CC(CS([O-])(=O)=O)OC=2C(=CC(CCCS([O-])(=O)=O)=CC=2)OC)=C1O RYAGRZNBULDMBW-UHFFFAOYSA-L 0.000 claims description 3
- 229920005552 sodium lignosulfonate Polymers 0.000 claims description 3
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 3
- 235000011152 sodium sulphate Nutrition 0.000 claims description 3
- VGTPCRGMBIAPIM-UHFFFAOYSA-M sodium thiocyanate Chemical compound [Na+].[S-]C#N VGTPCRGMBIAPIM-UHFFFAOYSA-M 0.000 claims description 3
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 2
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 2
- 239000001110 calcium chloride Substances 0.000 claims description 2
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 2
- 235000011148 calcium chloride Nutrition 0.000 claims description 2
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 claims description 2
- 239000011777 magnesium Substances 0.000 claims description 2
- 229910052749 magnesium Inorganic materials 0.000 claims description 2
- 229920001296 polysiloxane Polymers 0.000 claims description 2
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 claims description 2
- 229910052939 potassium sulfate Inorganic materials 0.000 claims description 2
- 235000011151 potassium sulphates Nutrition 0.000 claims description 2
- 229910021487 silica fume Inorganic materials 0.000 claims description 2
- 239000011780 sodium chloride Substances 0.000 claims description 2
- 235000002639 sodium chloride Nutrition 0.000 claims description 2
- 235000010288 sodium nitrite Nutrition 0.000 claims description 2
- 229910052726 zirconium Inorganic materials 0.000 claims description 2
- 239000010883 coal ash Substances 0.000 claims 1
- 239000004615 ingredient Substances 0.000 claims 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 abstract description 4
- 230000003213 activating effect Effects 0.000 abstract 1
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 description 54
- 238000003756 stirring Methods 0.000 description 25
- 239000000463 material Substances 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 6
- HOOWDPSAHIOHCC-UHFFFAOYSA-N dialuminum tricalcium oxygen(2-) Chemical compound [O--].[O--].[O--].[O--].[O--].[O--].[Al+3].[Al+3].[Ca++].[Ca++].[Ca++] HOOWDPSAHIOHCC-UHFFFAOYSA-N 0.000 description 5
- 230000036571 hydration Effects 0.000 description 4
- 238000006703 hydration reaction Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000011056 performance test Methods 0.000 description 4
- 238000006477 desulfuration reaction Methods 0.000 description 3
- 230000023556 desulfurization Effects 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229910001653 ettringite Inorganic materials 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003623 enhancer Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000003469 silicate cement Substances 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000005406 washing 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
-
- 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
Abstract
The invention belongs to the field of cement production, and relates to a gypsum modifier for cement production. The gypsum modifier of the invention contains 10-30% of dispersing agent, 40-80% of reinforcing agent, 5-10% of activating agent and 5-20% of auxiliary agent. The viscosity of gypsum can be reduced by using the gypsum modifier, the dispersibility is good, and the use is convenient; the modified gypsum is used for reducing the mixing amount in cement production, increasing the cement strength and greatly improving the sulfate resistance.
Description
Technical Field
The invention belongs to the field of cement production, and relates to a gypsum modifier for cement production.
Background
It is well known that gypsum is one of the essential components of cement production and mainly acts in cement to regulate setting time, i.e. as retarder. Numerous theoretical academic studies have shown; the hydration rate of tricalcium aluminate is the fastest in the four mineral compositions of cement clinker. In order to ensure good workability (proper setting time) of cement, it is necessary to reduce and suppress the drawbacks of rapid hydration of tricalcium aluminate by adding a retarder. The main components of the gypsum are utilized to quickly dissolve and react with tricalcium aluminate to generate ettringite, and the ettringite is wrapped on the surface of the tricalcium aluminate so as to inhibit further hydration of the tricalcium aluminate, thereby prolonging the hydration process and ensuring that the cement has proper setting time.
In the process of producing cement, the addition amount of gypsum must be strictly controlled, if the addition amount of gypsum is too small, the situation of instant setting of cement may occur, but if the addition amount of gypsum is too small, the situation of too high setting speed of cement may occur, and even cement stone cracking may be caused in the later stage.
At present, a large amount of industrial by-product gypsum such as phosphogypsum, desulfurized gypsum and the like is applied. Phosphogypsum and desulfurized gypsum are high in water content and viscosity, and are not easy to discharge when in use. The presence of impurities in phosphogypsum further restricts its use in cement production. Compared with natural gypsum, phosphogypsum has less influence on the standard consistency and mechanical properties of silicate cement, but can delay the setting time of cement to different degrees. At the same time, the presence of impurities also deteriorates the compatibility of cement with certain types of water reducers.
In order to eliminate or reduce the influence of phosphogypsum impurities on the quality of cement, the actual production needs to adopt processes of aging, water washing, lime neutralization and the like, but the adverse effect on the cement performance, particularly the problem of compatibility with additives, of the treated phosphogypsum compared with natural gypsum still cannot be completely avoided, so that the phosphogypsum is limited to be used as a cement retarder, and the utilization cost of the phosphogypsum is increased in the pretreatment process, and secondary pollution is possibly caused.
Disclosure of Invention
The main purpose of the invention is to provide a gypsum modifier, which reduces the viscosity of gypsum after using the gypsum modifier, so that the gypsum modifier has good dispersibility, is convenient to use, and can reduce the addition amount of gypsum; the cement produced by the modified gypsum has increased strength and sulfate resistance.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the gypsum modifier mainly comprises the following components:
10 to 30 percent of dispersing agent
40-80% of reinforcing agent
5-10% of activator
5-20% of auxiliary agent
Specifically, the modifier comprises the following components:
15-30% of dispersing agent
50-70% of reinforcing agent
5-10% of activator
10-15% of auxiliary agent
The dispersing agent in the gypsum modifier is mainly lignosulfonate and/or alcohol amine substances.
Preferably, the dispersing agent is a mixture of lignosulfonate and alcohol amine substances;
further preferably, the use ratio of the lignosulfonate to the alcohol amine substance is 1-3:1.
In certain embodiments, the lignosulfonate may be calcium lignosulfonate, sodium lignosulfonate, magnesium lignosulfonate; the alcohol amine substance can be triethanolamine, diethanolamine, triisopropanolamine.
Preferably, the lignosulfonate is sodium lignosulfonate or calcium lignosulfonate; the alcohol amine substances are triethanolamine and triisopropanolamine.
In certain embodiments, the enhancer may be a mixture of one or more of sodium thiocyanate, sodium sulfate, potassium sulfate, calcium chloride, sodium chloride, aluminum chloride, sodium nitrite, triethanolamine, triisopropanolamine.
Preferably, the reinforcing agent is sodium thiocyanate or sodium sulfate.
In certain embodiments, the activator may be zirconium silicone, sodium silicate, or other commonly used activators.
In certain embodiments, the adjunct can be silica fume, high fines coal dust.
The invention also provides application of the gypsum modifier, namely the gypsum modifier can be used for preparing modified gypsum and producing cement.
The invention has the following beneficial effects:
the gypsum modifier prepared by the invention can greatly reduce the viscosity of gypsum, so that the gypsum modifier has good dispersibility and is convenient to uniformly add when in use; the mixing amount of the modified gypsum is reduced from 4-5% to 2.5-3% when cement production is carried out; the cement produced by adopting the modified gypsum has the advantages of 3-5Mpa increase in strength, great improvement in sulfate resistance, and remarkable economic and social benefits.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
The present invention is further illustrated below with reference to specific examples, which are to be construed as merely illustrative of the invention and not limiting of its scope, as various equivalent modifications to the invention will fall within the scope of the claims of the application after reading the invention.
Example 1 preparation of gypsum modifier
Adding the above materials into a stirrer, and stirring uniformly to obtain the gypsum modifier.
Example 2 preparation of gypsum modifier
Adding the above materials into a stirrer, and stirring uniformly to obtain the gypsum modifier.
EXAMPLE 3 preparation of Gypsum modifier
Adding the above materials into a stirrer, and stirring uniformly to obtain the gypsum modifier.
EXAMPLE 4 preparation of modified phosphogypsum
Adding the materials into a stirrer, and uniformly stirring to obtain a gypsum modifier; and mixing the prepared gypsum modifier with phosphogypsum, and stirring uniformly (20% of the gypsum modifier and 80% of the phosphogypsum) to obtain the modified phosphogypsum.
EXAMPLE 5 preparation of modified phosphogypsum
Adding the materials into a stirrer, and uniformly stirring to obtain a gypsum modifier; and mixing the prepared gypsum modifier with phosphogypsum, and stirring uniformly (20% of the gypsum modifier and 80% of the phosphogypsum) to obtain the modified phosphogypsum.
EXAMPLE 6 preparation of modified phosphogypsum
Adding the materials into a stirrer, and uniformly stirring to obtain a gypsum modifier; and mixing the prepared gypsum modifier with phosphogypsum, and stirring uniformly (20% of the gypsum modifier and 80% of the phosphogypsum) to obtain the modified phosphogypsum.
EXAMPLE 7 preparation of modified phosphogypsum
Adding the materials into a stirrer, and uniformly stirring to obtain a gypsum modifier; and mixing the prepared gypsum modifier with phosphogypsum, and stirring uniformly (20% of the gypsum modifier and 80% of the phosphogypsum) to obtain the modified phosphogypsum.
EXAMPLE 8 preparation of modified phosphogypsum
Adding the materials into a stirrer, and uniformly stirring to obtain a gypsum modifier; and mixing the prepared gypsum modifier with phosphogypsum, and stirring uniformly (20% of the gypsum modifier and 80% of the phosphogypsum) to obtain the modified phosphogypsum.
EXAMPLE 9 preparation of modified desulfurized gypsum
Adding the materials into a stirrer, and uniformly stirring to obtain a gypsum modifier; and mixing and stirring the prepared gypsum modifier and the desulfurized gypsum uniformly (20% of the gypsum modifier and 80% of the desulfurized gypsum) to prepare the modified desulfurized gypsum.
Comparative example 1 preparation of modified phosphogypsum
Adding the materials into a stirrer, and uniformly stirring to obtain a gypsum modifier; and mixing the prepared gypsum modifier with phosphogypsum, and stirring uniformly (20% of the gypsum modifier and 80% of the phosphogypsum) to obtain the modified phosphogypsum.
Comparative example 2 preparation of modified phosphogypsum
Adding the materials into a stirrer, and uniformly stirring to obtain a gypsum modifier; and mixing the prepared gypsum modifier with phosphogypsum, and stirring uniformly (20% of the gypsum modifier and 80% of the phosphogypsum) to obtain the modified phosphogypsum.
Comparative example 3 preparation of modified phosphogypsum
Adding the materials into a stirrer, and uniformly stirring to obtain a gypsum modifier; and mixing the prepared gypsum modifier with phosphogypsum, and stirring uniformly (20% of the gypsum modifier and 80% of the phosphogypsum) to obtain the modified phosphogypsum.
Comparative example 4 preparation of modified phosphogypsum
Adding the materials into a stirrer, and uniformly stirring to obtain a gypsum modifier; and mixing the prepared gypsum modifier with phosphogypsum, and stirring uniformly (20% of the gypsum modifier and 80% of the phosphogypsum) to obtain the modified phosphogypsum.
Comparative example 5 preparation of modified phosphogypsum
Adding the materials into a stirrer, and uniformly stirring to obtain a gypsum modifier; and mixing the prepared gypsum modifier with phosphogypsum, and stirring uniformly (20% of the gypsum modifier and 80% of the phosphogypsum) to obtain the modified phosphogypsum.
Performance testing
In order to further verify the influence of the gypsum modifier in cement production, a part of the gypsum modifier prepared by the invention is selected, a cement sample is prepared, and performance test is carried out.
1. Influence of modified phosphogypsum on cement production
The modified phosphogypsum prepared in example 4, examples 6-8 and comparative examples 1-5 was selected, cement samples were prepared, and performance tests were performed.
Table 1 cement production formulation
The cements produced in the above proportions were tested for setting time and cement strength, and the results are shown in table 2 below.
TABLE 2 Cement Performance test results
2. Influence of modified desulfurized gypsum on cement production
The modified desulfurized gypsum obtained in example 9 was selected, cement samples were prepared, and cement setting time and cement strength were measured, and the results are shown in tables 3 and 4.
Table 3 cement production formulation
TABLE 4 Cement Performance test results
As can be seen from the results in tables 1 to 4, the viscosity of the modified phosphogypsum and the modified desulfurization gypsum produced by the gypsum modifier of the invention is greatly reduced, the dispersibility is good, and the modified phosphogypsum and the modified desulfurization gypsum are convenient to be added uniformly during use; when the modified phosphogypsum and the desulfurized gypsum are used for cement production, the mixing amount is obviously reduced from 4-5% before modification to 2.5-3% after modification, the adding amount of the gypsum is obviously reduced, and the production cost is saved; the cement produced by using the modified phosphogypsum and the modified desulfurization gypsum has the advantages of shortening the setting time, increasing the cement strength by 3-5Mpa and greatly improving the sulfate resistance of the cement.
Claims (5)
1. A gypsum modifier characterized by comprising the following components:
10 to 30 percent of dispersing agent
40-80% of reinforcing agent
5-10% of activator
5-20% of an auxiliary agent;
the dispersing agent is a mixture of lignosulfonate and alcohol amine substances, and the use ratio of the lignosulfonate to the alcohol amine substances is 1-3:1;
the reinforcing agent is one or a combination of more of sodium thiocyanate, sodium sulfate, potassium sulfate, calcium chloride, sodium chloride, aluminum chloride, sodium nitrite, triethanolamine and triisopropanolamine;
the activator is silicone zirconium;
the auxiliary agent is silica fume or high-fine coal ash.
2. The gypsum modifier of claim 1, wherein the proportions of the ingredients are:
15-30% of dispersing agent
50-70% of reinforcing agent
5-10% of activator
10-15% of auxiliary agent.
3. The gypsum modifier of claim 1, wherein the lignosulfonate is calcium lignosulfonate, sodium lignosulfonate, or magnesium lignosulfonate.
4. The gypsum modifier of claim 1, wherein the alcohol amine is triethanolamine, diethanolamine, or triisopropanolamine.
5. Use of a gypsum modifier as claimed in claim 1 or 2 in the preparation of modified gypsum, cement production.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310548832.6A CN116514450B (en) | 2023-05-16 | 2023-05-16 | Gypsum modifier for cement production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310548832.6A CN116514450B (en) | 2023-05-16 | 2023-05-16 | Gypsum modifier for cement production |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116514450A CN116514450A (en) | 2023-08-01 |
| CN116514450B true CN116514450B (en) | 2024-02-06 |
Family
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Family Applications (1)
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101367632A (en) * | 2008-09-26 | 2009-02-18 | 四川绵竹三佳饲料有限责任公司 | Modified ardealite setting retarder for cement and its preparing process |
| CN102745924A (en) * | 2012-07-13 | 2012-10-24 | 武汉理工大学 | Phosphogypsum-modifying method capable of shortening coagulating time of phosphogypsum-based cement concrete |
| CN104261716A (en) * | 2014-09-19 | 2015-01-07 | 山东宏艺科技股份有限公司 | Ardealite-based cement retarder and preparation method thereof |
| RU2572432C1 (en) * | 2014-09-09 | 2016-01-10 | Общество с ограниченной ответственностью фирма "ВЕФТ" (ООО фирма "ВЕФТ") | Additive for modification of gypsum binders, construction mortars and concretes on their basis |
| CN108002731A (en) * | 2016-11-01 | 2018-05-08 | 李香侠 | A kind of special adjustable solidification agent of ardealite base cement and preparation method |
| CN112110675A (en) * | 2020-08-11 | 2020-12-22 | 重庆源锦锦兴新材料科技有限公司 | Environment-friendly anti-cracking waterproof agent for concrete and preparation method thereof |
| CN115093150A (en) * | 2022-07-07 | 2022-09-23 | 武汉理工大学 | Modifier for improving setting and hardening performance and carbonization resistance of phosphogypsum-based cementing material |
| CN115196936A (en) * | 2022-07-19 | 2022-10-18 | 贵州磷化绿色环保产业有限公司 | Gypsum-based indoor terrace self-leveling concrete prepared from phosphogypsum active powder and preparation method and application thereof |
-
2023
- 2023-05-16 CN CN202310548832.6A patent/CN116514450B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101367632A (en) * | 2008-09-26 | 2009-02-18 | 四川绵竹三佳饲料有限责任公司 | Modified ardealite setting retarder for cement and its preparing process |
| CN102745924A (en) * | 2012-07-13 | 2012-10-24 | 武汉理工大学 | Phosphogypsum-modifying method capable of shortening coagulating time of phosphogypsum-based cement concrete |
| RU2572432C1 (en) * | 2014-09-09 | 2016-01-10 | Общество с ограниченной ответственностью фирма "ВЕФТ" (ООО фирма "ВЕФТ") | Additive for modification of gypsum binders, construction mortars and concretes on their basis |
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| CN108002731A (en) * | 2016-11-01 | 2018-05-08 | 李香侠 | A kind of special adjustable solidification agent of ardealite base cement and preparation method |
| CN112110675A (en) * | 2020-08-11 | 2020-12-22 | 重庆源锦锦兴新材料科技有限公司 | Environment-friendly anti-cracking waterproof agent for concrete and preparation method thereof |
| CN115093150A (en) * | 2022-07-07 | 2022-09-23 | 武汉理工大学 | Modifier for improving setting and hardening performance and carbonization resistance of phosphogypsum-based cementing material |
| CN115196936A (en) * | 2022-07-19 | 2022-10-18 | 贵州磷化绿色环保产业有限公司 | Gypsum-based indoor terrace self-leveling concrete prepared from phosphogypsum active powder and preparation method and application thereof |
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| CN116514450A (en) | 2023-08-01 |
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