CN115806396B - Super-retarding high-folding-pressure-ratio super-sulfur cement - Google Patents
Super-retarding high-folding-pressure-ratio super-sulfur cement Download PDFInfo
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- CN115806396B CN115806396B CN202210789679.1A CN202210789679A CN115806396B CN 115806396 B CN115806396 B CN 115806396B CN 202210789679 A CN202210789679 A CN 202210789679A CN 115806396 B CN115806396 B CN 115806396B
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- 239000004568 cement Substances 0.000 title claims abstract description 79
- 239000011593 sulfur Substances 0.000 title claims abstract description 19
- 229910052717 sulfur Inorganic materials 0.000 title claims abstract description 19
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 21
- 239000010440 gypsum Substances 0.000 claims abstract description 21
- 239000002893 slag Substances 0.000 claims abstract description 17
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 15
- 239000002989 correction material Substances 0.000 claims abstract description 15
- 239000000843 powder Substances 0.000 claims abstract description 14
- 229910052934 alunite Inorganic materials 0.000 claims abstract description 10
- 239000010424 alunite Substances 0.000 claims abstract description 10
- KPZTWMNLAFDTGF-UHFFFAOYSA-D trialuminum;potassium;hexahydroxide;disulfate Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Al+3].[Al+3].[Al+3].[K+].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O KPZTWMNLAFDTGF-UHFFFAOYSA-D 0.000 claims abstract description 10
- 239000012190 activator Substances 0.000 claims abstract description 7
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 239000000203 mixture Substances 0.000 claims description 15
- 230000000694 effects Effects 0.000 claims description 9
- 230000036571 hydration Effects 0.000 claims description 9
- 238000006703 hydration reaction Methods 0.000 claims description 9
- 239000003469 silicate cement Substances 0.000 claims description 7
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- 229910001570 bauxite Inorganic materials 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 230000006641 stabilisation Effects 0.000 claims description 4
- 238000011105 stabilization Methods 0.000 claims description 4
- 239000004115 Sodium Silicate Substances 0.000 claims description 3
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 3
- 229910052925 anhydrite Inorganic materials 0.000 claims description 3
- 239000000292 calcium oxide Substances 0.000 claims description 3
- 235000012255 calcium oxide Nutrition 0.000 claims description 3
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 3
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 claims description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 2
- 239000005864 Sulphur Substances 0.000 claims 1
- OSMSIOKMMFKNIL-UHFFFAOYSA-N calcium;silicon Chemical compound [Ca]=[Si] OSMSIOKMMFKNIL-UHFFFAOYSA-N 0.000 claims 1
- 239000000758 substrate Substances 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 16
- 238000002360 preparation method Methods 0.000 abstract description 5
- 239000004035 construction material Substances 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 4
- 239000011575 calcium Substances 0.000 description 4
- 229910052791 calcium Inorganic materials 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 229910001653 ettringite Inorganic materials 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000000378 calcium silicate Substances 0.000 description 2
- 229910052918 calcium silicate Inorganic materials 0.000 description 2
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 2
- 238000001000 micrograph Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- LOUPRKONTZGTKE-WZBLMQSHSA-N Quinine Natural products C([C@H]([C@H](C1)C=C)C2)C[N@@]1[C@@H]2[C@H](O)C1=CC=NC2=CC=C(OC)C=C21 LOUPRKONTZGTKE-WZBLMQSHSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 238000009411 base construction Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- LOUPRKONTZGTKE-UHFFFAOYSA-N cinchonine Natural products C1C(C(C2)C=C)CCN2C1C(O)C1=CC=NC2=CC=C(OC)C=C21 LOUPRKONTZGTKE-UHFFFAOYSA-N 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 229960000948 quinine Drugs 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention belongs to the technical field of road construction materials, and particularly relates to super-retarding super-sulfur cement with high folding ratio and a preparation method and application thereof. The super-sulfur cement comprises the following components in parts by weight: 60-75 parts of slag powder, 12-20 parts of gypsum, 5-7 parts of alkaline activator, 3-5 parts of alunite and 5-8 parts of aluminum correction material. The super-sulfur cement has the characteristic of long setting time, can realize three-layer continuous paving of the stabilized macadam of the highway cement, improves the construction efficiency and shortens the construction period; in addition, the super-sulfur cement has high folding pressure ratio and is particularly suitable for highway pavement construction.
Description
Technical Field
The invention belongs to the technical field of road construction materials, and particularly relates to super-retarding super-sulfur cement with high folding ratio and a preparation method and application thereof.
Background
The super sulfate cement was invented by the professor quinine in germany in 1909, and is also called gypsum slag cement or slag sulfate cement in China. The cement is prepared by grinding a small amount of silicate cement, a large amount of blast furnace slag and gypsum serving as industrial byproducts, and has remarkable economic benefit and effects of energy conservation, emission reduction and consumption reduction. However, the conventional super-sulfur cement has the problems of insufficient strength, especially slow early strength increase and the like, the small clinker consumption can cause the surface sanding in the later stage, the large clinker consumption can cause the stability risk and the like, and the super-sulfur cement cannot be widely applied.
More than 90% of semi-rigid base materials in expressways in China are cement stabilized macadam, which can provide higher road bearing capacity and has lower cost. The design thickness of cement stabilized macadam in the current pavement structural layer is generally more than 56 cm, and the cement stabilized macadam needs to be paved in a plurality of layers in a time-sharing way during construction due to the compaction process problem; secondly, the cement used in the current engineering is ordinary Portland cement, and the physical properties of the cement can only meet the construction process of on-site two-layer paving, which directly affects the later asphalt pavement construction, and leads to low construction efficiency and prolonged construction period.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the ultra-sulfur cement with the ultra-retarding high-folding-pressure ratio and the preparation method and the application thereof, so as to solve the problems of low early strength, sand formation and the like of the existing ultra-sulfur cement; the invention ensures that the cement has the advantages of super retarding, high folding ratio and the like by adjusting the dosage of each component, can realize the three-layer continuous paving process of the cement stabilized macadam, improves the construction efficiency, shortens the construction period and meets the requirements of the current highway water stabilized base construction.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the ultra-retarding high-folding ratio ultra-sulfur cement comprises the following components in parts by weight: 60-75 parts of slag powder, 12-20 parts of gypsum, 5-7 parts of alkaline activator, 3-5 parts of alunite and 5-8 parts of aluminum correction material.
Preferably, the ratio of calcium to silicon in the slag powder is more than 1, the content of alumina is not less than 10%, and the 28-day activity index is more than 95%.
Preferably, the gypsum comprises any one or a combination of a plurality of anhydrite, phosphogypsum and desulfurized gypsum.
Preferably, the alkaline activator comprises any one or a combination of a plurality of silicate cement clinker, quicklime and sodium silicate.
Preferably, the aluminum correction material is aluminum hydroxide or calcined bauxite.
The invention also discloses a preparation method of the super-retarding high-folding-ratio super-sulfur cement, which is characterized in that slag powder, gypsum, an alkaline excitant, alunite and an aluminum correction material are mixed and ground to obtain the super-sulfur cement.
The physical indexes of the ultra-sulfur cement are specifically as follows:
specific surface area of 380-450m 2 The water consumption of the standard consistency is 29% -33%, the initial setting time is 8-10h, the final setting time is 12-16h, the 3-day compressive strength is 18-21 MPa, the 3-day flexural strength is 4.5-6.0 MPa, the 28-day compressive strength is 44-48 MPa, the 28-day flexural strength is 8.0-10.0 MPa, and the 3-day hydration heat is 140J/g-180J/g.
The invention also discloses application of the super-retarding high-folding-ratio super-sulfur cement, which is used for stabilizing the macadam foundation.
The cement stabilized macadam base layer comprises a water-stable mixture, wherein the water-stable mixture comprises the following components in parts by weight: 90-93 parts of continuous graded aggregate, 3-4.5 parts of ultra-sulfur cement and 4-5.5 parts of water, wherein the construction allowable delay time range of the water-stable mixture is 8-12 h.
Advantageous effects
The invention provides ultra-retarding high-folding ratio ultra-sulfur cement, a preparation method and application thereof, wherein an aluminum correction material and alunite are added to the proportion of an ultra-sulfur cement foundation, the aluminum correction material reacts with calcium ions generated by dissolving gypsum in an ultra-sulfur cement system, sulfate ions and alkaline conditions provided by an alkaline excitant to generate needle-shaped ettringite crystals, and the ettringite crystals cross-grow in the system; secondly, the active silicon dioxide in alunite reacts under alkaline condition to generate hydrated calcium silicate gel, and the combined action of the active silicon dioxide and the hydrated calcium silicate gel provides the early strength of the ultra-sulfur cement and solves the problem of low early strength of an ultra-sulfur cement system. The super-sulfur cement is hydrated to generate a large amount of ettringite crystals, and the flexural strength of the cement-based cementing material is improved through the fiber reinforcement effect of the ettringite crystals. In addition, the pH value after hydration in the ultra-sulfur cement system is kept at about 12, and the activity of exciting slag powder is slower, so that the setting time of the cement is longer than that of the traditional silicate cement system, the cement of the system is adopted as the cementing material of the cement stabilized macadam mixture, the construction allowable delay time can be prolonged to 12 hours at maximum, and the condition is provided for the site construction of the cement stabilized macadam mixture by adopting a three-layer continuous paving process.
Drawings
FIG. 1 is a scanning electron microscope picture of the initial stage of the hydration of ultra-retarding high-refractive-index ultra-sulfur cement;
fig. 2 is a scanning electron microscope picture of the ultra-retarded high refractive index ultra-sulfur cement at the early 28 days.
Detailed Description
Hereinafter, the present invention will be described in detail. Before the description, it is to be understood that the terms used in this specification and the appended claims should not be construed as limited to general and dictionary meanings, but interpreted based on the meanings and concepts corresponding to technical aspects of the present invention on the basis of the principle that the inventor is allowed to define terms appropriately for the best explanation. Accordingly, the description set forth herein is merely a preferred example for the purpose of illustration and is not intended to limit the scope of the invention, so that it should be understood that other equivalents or modifications may be made thereto without departing from the spirit and scope of the invention.
The following examples are merely illustrative of embodiments of the present invention and are not intended to limit the invention in any way, and those skilled in the art will appreciate that modifications may be made without departing from the spirit and scope of the invention. Unless otherwise specified, reagents and equipment used in the following examples are commercially available products.
Example 1
The ultra-retarding high-folding ratio ultra-sulfur cement comprises the following components in parts by weight:
60 parts of slag powder, 20 parts of gypsum, 7 parts of alkaline activator, 5 parts of alunite and 8 parts of aluminum correction material.
Wherein the ratio of calcium to silicon in the slag powder is 1.2, the content of alumina is 15%, and the activity index is more than 95% in 28 days; the gypsum is a mixture of desulfurized gypsum and phosphogypsum; the alkaline excitant is a mixture of silicate cement clinker and sodium silicate; the aluminum correction material is calcined bauxite.
The materials are mixed and ground to obtain the ultra-sulfur cement, and the physical indexes are as follows:
specific surface area 380m 2 The water consumption per kg, the standard consistency is 29%, the initial setting time is 10 hours, the final setting time is 16 hours, the compressive strength is 18MPa in 3 days, the flexural strength is 4.5 MPa in 3 days, the compressive strength is 44MPa in 28 days, the flexural strength is 8.0MPa in 28 days, and the hydration heat is 140J/g in 3 days.
The application of the super-retarding high-folding-ratio super-sulfur cement comprises the following steps:
the cement stabilized macadam mixed by the cement is used as a base layer, and the water stabilization mixing ratio is determined according to the maximum dry density and the optimal water content and comprises the following steps: 90 parts of continuous graded aggregate, 4.5 parts of ultra-sulfur cement and 5.5 parts of water, and a delay time test shows that: the construction allowable delay time of the water-stable mixture is 12h, the strength value meeting the standard requirement is not lower than the initial strength value. The specific results are shown in Table 1.
Example 2
The ultra-retarding high-folding ratio ultra-sulfur cement comprises the following components in parts by weight:
75 parts of slag powder, 12 parts of gypsum, 5 parts of alkaline activator, 3 parts of alunite and 5 parts of aluminum correction material. Wherein the ratio of calcium to silicon in the slag powder is 1.1, the content of alumina is 10%, and the activity index is more than 95% in 28 days; the gypsum is a mixture of desulfurized gypsum and anhydrite; the alkaline excitant is a mixture of silicate cement clinker and quicklime; the aluminum correction material is aluminum hydroxide.
The materials are mixed and ground to obtain the ultra-sulfur cement, and the physical indexes are as follows:
specific surface area 450m 2 Per kg, the water consumption of the standard consistency is 33%, the initial setting time is 8 hours, the final setting time is 12 hours, the 3-day compressive strength is 21MPa, the 3-day flexural strength is 6.0 MPa, the 28-day compressive strength is 48MPa, the 28-day flexural strength is 10.0 MPa, and the 3-day hydration heat is 180J/g.
The application of the super-retarding high-folding-ratio super-sulfur cement comprises the following steps:
the cement stabilized macadam mixed by the cement is used as a base layer, and the water stabilization mixing ratio is determined according to the maximum dry density and the optimal water content and comprises the following steps: 91 parts of continuous graded aggregate, 4.5 parts of ultra-sulfur cement and 4.5 parts of water, and a delay time test shows that: the construction allowable delay time of the water-stable mixture is 8h, the strength value meeting the standard requirement is not lower than the initial strength value. The specific results are shown in Table 1.
Example 3
The ultra-retarding high-folding ratio ultra-sulfur cement comprises the following components in parts by weight:
70 parts of slag powder, 15 parts of gypsum, 6 parts of alkaline activator, 4 parts of alunite and 5 parts of aluminum correction material.
Wherein the ratio of calcium to silicon in the slag powder is 1.3, the content of alumina is 13%, and the activity index is more than 95% in 28 days; the gypsum is desulfurized gypsum; the alkaline excitant is silicate cement clinker; the aluminum correction material is calcined bauxite.
The materials are mixed and ground to obtain the ultra-sulfur cement, and the physical indexes are as follows:
specific surface area 400m 2 The water consumption per kg is 31% at standard consistency, the initial setting time is 9h, the final setting time is 14h, the 3-day compressive strength is 20MPa, the 3-day flexural strength is 5.5 MPa, the 28-day compressive strength is 46MPa, the 28-day flexural strength is 9.5MPa, and the 3-day hydration heat is 164J/g.
The application of the super-retarding high-folding-ratio super-sulfur cement comprises the following steps:
the cement stabilized macadam mixed by the cement is used as a subbase layer, and the water stabilization mixing ratio is determined according to the maximum dry density and the optimal water content and comprises the following steps: 93 parts of continuous graded aggregate, 3 parts of ultra-sulfur cement, 4 parts of water, and delay time tests show that: the construction allowable delay time of the water-stable mixture is 10h, the strength value meeting the standard requirement is not lower than the initial strength value. The specific results are shown in Table 1.
TABLE 1 mechanical Properties of Cement stabilized macadam mixture
As can be seen from the test results in Table 1, the 7d unconfined compressive strengths of examples 1-3 all meet the values within the specification requirements, and the mechanical properties of the molded test pieces after the delay time also meet the specification requirements and are slightly higher than the initial strength values.
FIG. 1 is a scanning electron microscope image of the initial stage of hydration of ultra-retarded high-refractive-index ultra-sulfur cement described in example 3.
FIG. 2 is a scanning electron microscope image of the ultra-retarded high refractive index ultra-sulfur cement of example 3 at an early 28-day period.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be apparent to one skilled in the art that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (8)
1. The ultra-retarding high-folding ratio ultra-sulfur cement is characterized by comprising the following components in parts by weight: 60-75 parts of slag powder, 12-20 parts of gypsum, 5-7 parts of alkaline excitant, 3-5 parts of alunite and 5-8 parts of aluminum correction material;
the aluminum correction material is aluminum hydroxide or calcined bauxite;
the physical indexes of the ultra-sulfur cement are specifically as follows:
specific surface area of 380-450m 2 Per kg, 29% -33% of water consumption of standard consistency, 8-10h of initial setting time, 12-16h of final setting time and 3 daysCompressive strength of 18 MPa-21 MPa, flexural strength of 4.5 MPa-6.0 MPa for 3 days, compressive strength of 44MPa-48MPa for 28 days, flexural strength of 8.0 MPa-10.0 MPa for 28 days and hydration heat of 140. 140J/g-180J/g for 3 days, wherein the pH value of the super-sulfur cement system after hydration is kept at 12, and the super-sulfur cement can realize a three-layer continuous paving process of cement stabilized macadam.
2. The ultra-retarding high-refractive-index ultra-sulfur cement according to claim 1, wherein the calcium-silicon ratio in the slag powder is more than 1, the alumina content is not less than 10%, and the 28-day activity index is more than 95%.
3. The ultra-retarding high-refractive-pressure-ratio ultra-sulfur cement according to claim 1, wherein the gypsum comprises any one or a combination of a plurality of anhydrite, phosphogypsum and desulfurized gypsum.
4. The ultra-retarding high-folding-ratio ultra-sulfur cement according to claim 1, wherein the alkaline activator comprises any one or a combination of a plurality of silicate cement clinker, quicklime and sodium silicate.
5. The ultra-retarding high-refractive-pressure-ratio ultra-sulfur cement according to any one of claims 1 to 4, which is prepared by the following steps: mixing and grinding slag powder, gypsum, an alkaline excitant, alunite and an aluminum correction material to obtain the ultra-sulfur cement.
6. Use of ultra-retarded high-fold ratio ultra-sulphur cement according to any one of claims 1 to 5 for cement stabilization of gravel substrates.
7. The use according to claim 6, wherein the cement stabilized macadam base comprises a water-stable mixture comprising the following components in parts by weight: 90-93 parts of continuous graded aggregate, 3-4.5 parts of super-sulfur cement and 4-5.5 parts of water.
8. The use according to claim 7, wherein the construction-allowable delay time of the water-stable mixture is in the range of 8h-12h.
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|---|---|---|---|---|
| CN101885589A (en) * | 2010-06-23 | 2010-11-17 | 山东理工大学 | Compound sulfate cement |
| KR20110053833A (en) * | 2009-11-16 | 2011-05-24 | 한국지질자원연구원 | Blast furnace slag cement synthetic method and blast furnace slag cement produced by this method |
| CN102910852A (en) * | 2012-10-24 | 2013-02-06 | 中建商品混凝土成都有限公司 | Coagulant for super sulfate cement |
| CN114702294A (en) * | 2022-04-02 | 2022-07-05 | 山东高速工程检测有限公司 | Solid waste based super-retarding cementing material and preparation method and application thereof |
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- 2022-07-06 CN CN202210789679.1A patent/CN115806396B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110053833A (en) * | 2009-11-16 | 2011-05-24 | 한국지질자원연구원 | Blast furnace slag cement synthetic method and blast furnace slag cement produced by this method |
| CN101885589A (en) * | 2010-06-23 | 2010-11-17 | 山东理工大学 | Compound sulfate cement |
| CN102910852A (en) * | 2012-10-24 | 2013-02-06 | 中建商品混凝土成都有限公司 | Coagulant for super sulfate cement |
| CN114702294A (en) * | 2022-04-02 | 2022-07-05 | 山东高速工程检测有限公司 | Solid waste based super-retarding cementing material and preparation method and application thereof |
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| Title |
|---|
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| 高速公路路面破损快速修补新材料研究;王宗宝;;建筑技术开发(01);全文 * |
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