CN115806396A - Super-retarding high-breaking-pressure-ratio super-sulfur cement - Google Patents
Super-retarding high-breaking-pressure-ratio super-sulfur cement Download PDFInfo
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- CN115806396A CN115806396A CN202210789679.1A CN202210789679A CN115806396A CN 115806396 A CN115806396 A CN 115806396A CN 202210789679 A CN202210789679 A CN 202210789679A CN 115806396 A CN115806396 A CN 115806396A
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- 239000004568 cement Substances 0.000 title claims abstract description 81
- 239000011593 sulfur Substances 0.000 title claims abstract description 13
- 229910052717 sulfur Inorganic materials 0.000 title claims abstract description 13
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 41
- 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
- 239000012190 activator Substances 0.000 claims abstract description 14
- 239000000843 powder Substances 0.000 claims abstract description 14
- 239000002989 correction material Substances 0.000 claims abstract description 12
- 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
- 238000002360 preparation method Methods 0.000 claims abstract description 6
- 239000000203 mixture Substances 0.000 claims description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 230000000694 effects Effects 0.000 claims description 9
- 239000003513 alkali Substances 0.000 claims description 7
- 230000036571 hydration Effects 0.000 claims description 7
- 238000006703 hydration reaction Methods 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
- OSMSIOKMMFKNIL-UHFFFAOYSA-N calcium;silicon Chemical compound [Ca]=[Si] OSMSIOKMMFKNIL-UHFFFAOYSA-N 0.000 claims description 5
- 229910001570 bauxite Inorganic materials 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
- 238000000227 grinding Methods 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
- 239000004575 stone Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 2
- 239000003469 silicate cement Substances 0.000 claims description 2
- 230000006641 stabilisation Effects 0.000 claims description 2
- 238000011105 stabilization Methods 0.000 claims description 2
- 239000011159 matrix material Substances 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 17
- 239000004035 construction material Substances 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 10
- 239000011398 Portland cement Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 229910001653 ettringite Inorganic materials 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 3
- 239000000378 calcium silicate Substances 0.000 description 3
- 229910052918 calcium silicate Inorganic materials 0.000 description 3
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000002585 base Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 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
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The invention belongs to the technical field of road construction materials, and particularly relates to ultra-retarding high-breaking-pressure-ratio ultra-sulfur cement 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 cement stabilized macadam on a highway, improves the construction efficiency and shortens the construction period; in addition, the compression-reduction ratio of the super-sulfur cement is high, and the super-sulfur cement 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 ultra-retarding high-breaking-pressure-ratio ultra-sulfur cement and a preparation method and application thereof.
Background
The super sulfate cement was invented by professor Quel Germany in 1909, and is also called as gypsum slag cement or slag sulfate cement in China. The cement is prepared by grinding a small amount of portland cement and a large amount of blast furnace slag and gypsum which are industrial byproducts, and has remarkable economic benefits and the effects of saving energy, reducing emission and reducing consumption. However, the traditional ultra-sulfur cement has the problems of insufficient strength, particularly slow increase of early strength and the like, the problems of surface sand formation at the later stage caused by small clinker consumption, stability risk caused by large clinker consumption and the like, and cannot be widely applied.
Over 90% of semi-rigid base materials on expressways in China are cement stabilized macadam, and the materials can provide high road bearing capacity and are low in manufacturing cost. The design thickness of cement stabilized macadam in the present pavement structure layer generally exceeds 56 cm, and due to the compaction process problem, the cement stabilized macadam needs to be paved in different periods and multiple layers during construction; secondly, the cement used in the current engineering is ordinary portland cement, the physical properties of the cement can only meet the construction process of on-site two-layer paving, and the construction process directly influences the later-stage asphalt pavement construction, so that the construction efficiency is low, and the construction period is prolonged.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the ultra-sulfur cement with ultra-retarding and high-folding-pressure ratio, and the preparation method and the application thereof, so as to solve the problems of low early strength, sand generation and the like of the prior ultra-sulfur cement; according to the invention, by adjusting the using amount of each component, the cement has the advantages of super retardation, high breaking-pressing ratio and the like, can realize a three-layer continuous paving process of cement stabilized macadam, improves the construction efficiency, shortens the construction period, and meets the requirement of the current highway cement stabilized base construction.
In order to achieve the purpose, the invention adopts the following technical scheme:
the super-retarding high-breaking-ratio 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 an alkali activator, 3-5 parts of alunite and 5-8 parts of an aluminum correction material.
Preferably, the calcium-silicon ratio in the slag powder is more than 1, the content of alumina is not less than 10%, and the activity index in 28 days is more than 95%.
Preferably, the gypsum comprises any one or a combination of more of anhydrite, phosphogypsum and desulfurized gypsum.
Preferably, the alkali-activator comprises any one or a combination of more of portland 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 ultra-retarding high-breaking-ratio ultra-sulfur cement, which comprises the steps of mixing and grinding the slag powder, the gypsum, the alkali activator, the alunite and the aluminum correction material to obtain the ultra-sulfur cement.
The physical indexes of the ultra-sulfur cement are as follows:
the specific surface area is 380-450m 2 The water consumption of the standard consistency is 29 to 33 percent, the initial setting time is 8 to 10 hours, the final setting time is 12 to 169h, the compressive strength of 18MPa to 21MPa in 3 days, the flexural strength of 4.5 MPa to 6.0 MPa in 3 days, the compressive strength of 44MPa to 48MPa in 28 days, the flexural strength of 8.0MPa to 10.0 MPa in 28 days, and the hydration heat of 140J/g to 180J/g in 3 days.
The invention also discloses application of the ultra-retarding high-breaking-pressure ratio ultra-sulfur cement to cement stabilization of a macadam foundation.
The cement-stable crushed stone base layer comprises a water-stable mixture, and 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-fracture-ratio ultra-sulfur cement and a preparation method and application thereof.A rodlike ettringite crystal is generated by adding an aluminum correction material and alunite in the basic proportion of the ultra-sulfur cement, wherein the aluminum correction material reacts with calcium ions generated by dissolving gypsum in an ultra-sulfur cement system and alkaline conditions provided by sulfate ions and an alkaline activator in a reaction manner, and the ettringite crystal grows in the system in a crossed manner; secondly, the active silicon dioxide in the alunite reacts under the alkaline condition to generate hydrated calcium silicate gel, the combined action of the calcium silicate gel and the hydrated calcium silicate gel provides the early strength of the ultra-sulfur cement, and the problem that the early strength of an ultra-sulfur cement system is lower is solved. The ultra-sulfur cement is hydrated to generate a large amount of ettringite crystals, and the breaking strength of the cement-based cementing material is improved through the fiber reinforcement effect of the ettringite crystals. In addition, the pH value of the hydrated super-sulfur cement system is kept at about 12, and the activity of the excited slag powder is slow, so that the setting time of the cement is longer than that of the traditional portland cement system, the cement of the system is used as a cementing material of the cement stabilized macadam mixture, the construction allowable delay time can be prolonged to 12h to the maximum extent, and conditions are provided for the field 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 an initial stage of hydration of ultra-slow setting high-breaking-pressure ratio ultra-sulfur cement;
FIG. 2 is a scanning electron microscope picture of 28-day early stage of ultra-slow setting high-breaking-ratio ultra-sulfur cement.
Detailed Description
Hereinafter, the present invention will be described in detail. Before the description is made, it should be understood that the terms used in the present 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 proposed herein is just a preferable example for the purpose of illustrations only, not intended to limit the scope of the invention, so it should be understood that other equivalents and modifications could be made thereto without departing from the spirit and scope of the invention.
The following examples are given by way of illustration of embodiments of the invention and are not to be construed as limiting the invention, and it will be understood by those skilled in the art 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 super-retarding high-breaking-ratio super-sulfur cement comprises the following components in parts by weight:
60 parts of slag powder, 20 parts of gypsum, 7 parts of an alkali activator, 5 parts of alunite and 8 parts of an aluminum correction material.
Wherein the calcium-silicon ratio in the slag powder is 1.2, the content of alumina is 15 percent, and the activity index in 28 days is more than 95 percent; the gypsum is a mixture of desulfurized gypsum and phosphogypsum; the alkali activator is a mixture of portland cement clinker and sodium silicate; the aluminum calibration material was calcined bauxite.
The materials are mixed and ground to obtain the ultra-sulfur cement, and the physical indexes of the ultra-sulfur cement are as follows:
specific surface area 380m 2 The water consumption of the water is 29 percent at the standard consistency, the initial setting time is 10h, the final setting time is 1699 MPa at the 3-day compressive strength, the 3-day flexural strength is 4.5 MPa at the 3-day compressive strength, the 28-day compressive strength is 44MPa, the 28-day flexural strength is 8.0MPa, and the hydration heat is 140J/g at the 3-day time.
The application of the ultra-retarding high-breaking-pressure ratio ultra-sulfur cement comprises the following steps:
adopt above-mentioned cement mixture cement stabilized macadam as the basic unit, according to maximum dry density and best moisture content confirm that the stable mix proportion of water includes: 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 12 hours, meets the strength value of the specification requirement, and is not lower than the initial strength value. Specific results are shown in table 1.
Example 2
The super-retarding high-breaking-ratio super-sulfur cement comprises the following components in parts by weight:
75 parts of slag powder, 12 parts of gypsum, 5 parts of an alkaline activator, 3 parts of alunite and 5 parts of an aluminum correction material. Wherein the calcium-silicon ratio in the slag powder is 1.1, the content of alumina is 10 percent, and the activity index in 28 days is more than 95 percent; the gypsum is a mixture of desulfurized gypsum and anhydrite; the alkali activator is a mixture of portland cement clinker and quicklime; the aluminum calibration material is aluminum hydroxide.
The materials are mixed and ground to obtain the ultra-sulfur cement, and the physical indexes of the ultra-sulfur cement are as follows:
specific surface area 450m 2 The water consumption for standard consistency is 33 percent, the initial setting time is 8h, the final setting time is 12h, 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 ultra-retarding high-breaking-pressure ratio ultra-sulfur cement comprises the following steps:
adopt above-mentioned cement mix cement stable broken stone as the basic unit, it includes to determine the stable mix proportion of water according to maximum dry density and best moisture content: 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 8 hours, meets the strength value of the standard requirement, and is not lower than the initial strength value. Specific results are shown in table 1.
Example 3
The super-retarding high-breaking-ratio super-sulfur cement comprises the following components in parts by weight:
70 parts of slag powder, 15 parts of gypsum, 6 parts of an alkaline activator, 4 parts of alunite and 5 parts of an aluminum correction material.
Wherein the calcium-silicon ratio in the slag powder is 1.3, the content of alumina is 13 percent, and the activity index in 28 days is more than 95 percent; the gypsum is desulfurized gypsum; the alkali activator is silicate cement clinker; the aluminum calibration material was calcined bauxite.
The materials are mixed and ground to obtain the ultra-sulfur cement, and the physical indexes of the ultra-sulfur cement are as follows:
specific surface area 400m 2 The water consumption of the standard consistency is 31 percent, the initial setting time is 9 hours, 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 ultra-retarding high-breaking-pressure ratio ultra-sulfur cement comprises the following steps:
adopt above-mentioned cement mixture cement stabilized macadam as the subbase, according to maximum dry density and best moisture content confirm that the stable mix proportion of water includes: 93 parts of continuous graded aggregate, 3 parts of ultra-sulfur cement and 4 parts of water, and a delay time test shows that: the construction allowable delay time of the water-stable mixture is 10 hours, meets the strength value of the standard requirement, and is not lower than the initial strength value. Specific results are shown in table 1.
TABLE 1 mechanical Properties of Cement stabilized macadam mixtures
As shown in the test results in Table 1, the unconfined compressive strengths of the 7d samples in examples 1 to 3 all satisfy the range values of the standard requirements, and the mechanical properties of the molded test pieces after the delay time also satisfy the standard requirements and are slightly higher than the initial strength values.
FIG. 1 is a scanning electron microscope picture of the ultra-retarding high-breaking-ratio ultra-sulfur cement in the initial stage of hydration in example 3.
FIG. 2 is a scanning electron microscope image of the early 28-day ultra-slow setting high-breaking-ratio ultra-sulfur cement described in example 3.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof; such modifications and substitutions do not depart from the spirit and scope of the corresponding claims.
Claims (10)
1. The super-retarding high-breaking-ratio super-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 activator, 3-5 parts of alunite and 5-8 parts of aluminum correction material.
2. The ultra-slow-setting high-breaking-ratio ultra-sulfur cement as claimed in claim 1, wherein the calcium-silicon ratio in the slag powder is more than 1, the content of alumina is not less than 10%, and the activity index in 28 days is more than 95%.
3. The ultra-slow setting high-breaking-ratio ultra-sulfur cement as claimed in claim 1, wherein the gypsum comprises any one or a combination of anhydrite, phosphogypsum and desulfurized gypsum.
4. The ultra-sulfur cement with ultra-slow setting and high breaking pressure ratio as claimed in claim 1, wherein the alkali-activator comprises any one or a combination of silicate cement clinker, quick lime and sodium silicate.
5. The ultra-slow setting high-breaking-ratio ultra-sulfur cement as claimed in claim 1, wherein the aluminum correction material is aluminum hydroxide or calcined bauxite.
6. The ultra-slow setting high-breaking-ratio ultra-sulfur cement as claimed in any one of claims 1 to 5, characterized in that the preparation method comprises: mixing and grinding the slag powder, the gypsum, the alkali activator, the alunite and the aluminum correction material to obtain the ultra-sulfur cement.
7. The ultra-slow setting high-breaking-ratio ultra-sulfur cement as claimed in any one of claims 1 to 5, wherein the physical indexes of the ultra-sulfur cement are as follows:
the specific surface area is 380-450m 2 The water consumption of the standard consistency is 29 to 33 percent, the initial setting time is 8 to 10 hours, the final setting time is 12 to 169h, the compressive strength of the mixture in 3 days is 18MPa to 21MPa, the flexural strength of the mixture in 3 days is 4.5 MPa to 6.0 MPa, the compressive strength of the mixture in 28 days is 44MPa to 48MPa, and the flexural strength of the mixture in 28 days is 28 daysThe strength is 8.0MPa to 10.0 MPa, and the hydration heat is 140J/g to 180J/g in 3 days.
8. The use of the ultra-slow setting high-breaking-ratio ultra-sulfur cement as claimed in any one of claims 1 to 7, characterized in that it is used for cement stabilization of a macadam foundation.
9. The use of claim 8, wherein the cement-stable crushed stone matrix layer 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.
10. The use according to claim 9, wherein the construction-allowed delay time of the water-stable mixture is in the range of 8h to 12h.
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| CN202210789679.1A CN115806396B (en) | 2022-07-06 | 2022-07-06 | Super-retarding high-folding-pressure-ratio super-sulfur cement |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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
Patent Citations (4)
| 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 |
Non-Patent Citations (2)
| Title |
|---|
| 游宝坤;吴万春;于发明;刘江宁;韩立林;陈富银;董同刚;张淑珍;: "补偿收缩混凝土――提高海工建筑和混凝土制品耐久性的新途径", 中国港湾建设, no. 01 * |
| 王宗宝;: "高速公路路面破损快速修补新材料研究", 建筑技术开发, no. 01 * |
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