CN115108791A - Heat-resistant concrete and preparation method and application thereof - Google Patents
Heat-resistant concrete and preparation method and application thereof Download PDFInfo
- Publication number
- CN115108791A CN115108791A CN202210689506.2A CN202210689506A CN115108791A CN 115108791 A CN115108791 A CN 115108791A CN 202210689506 A CN202210689506 A CN 202210689506A CN 115108791 A CN115108791 A CN 115108791A
- Authority
- CN
- China
- Prior art keywords
- heat
- forsterite
- resistant concrete
- parts
- particles
- 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.)
- Pending
Links
- 239000004567 concrete Substances 0.000 title claims abstract description 28
- 238000002360 preparation method Methods 0.000 title abstract description 7
- 239000002245 particle Substances 0.000 claims abstract description 36
- 229910052839 forsterite Inorganic materials 0.000 claims abstract description 34
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000004568 cement Substances 0.000 claims abstract description 21
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000000654 additive Substances 0.000 claims abstract description 14
- 230000000996 additive effect Effects 0.000 claims abstract description 14
- 239000004615 ingredient Substances 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 238000002679 ablation Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 9
- 235000019982 sodium hexametaphosphate Nutrition 0.000 claims description 4
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims description 4
- 235000019832 sodium triphosphate Nutrition 0.000 claims description 4
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims description 4
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 229910052609 olivine Inorganic materials 0.000 claims description 3
- 239000010450 olivine Substances 0.000 claims description 3
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims description 2
- 229910004298 SiO 2 Inorganic materials 0.000 claims 1
- 239000002994 raw material Substances 0.000 abstract description 14
- 239000003779 heat-resistant material Substances 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 8
- 238000010276 construction Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000011056 performance test Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000007767 bonding agent Substances 0.000 description 2
- 239000011449 brick Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005303 weighing 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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/06—Aluminous cements
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/76—Use at unusual temperatures, e.g. sub-zero
- C04B2111/763—High temperatures
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to the technical field of heat-resistant materials, and particularly discloses heat-resistant concrete and a preparation method and application thereof. The heat-resistant concrete comprises forsterite, calcium aluminate cement and an additive; the forsterite is a grade ingredient, wherein in the grade ingredient, the proportion of particles with the particle size of 5-8mm is 22-26%, the proportion of particles with the particle size of 3-5mm is 22-26%, the proportion of particles with the particle size of 1-3mm is 30-34%, and the proportion of particles with the particle size of less than 1mm is 18-22%. The concrete product of the invention has high strength, excellent comprehensive performance, natural and easily obtained raw materials of the product and higher cost performance.
Description
Technical Field
The invention relates to the technical field of heat-resistant materials, and particularly discloses heat-resistant concrete and a preparation method and application thereof.
Background
The materials for the diversion trench of the rocket launching base can be divided into two types according to the using position, and one type is used for the direct contact area of combustion flows of the diversion trench, such as the fire-facing surface, the airflow cone and the like. The other type is used for a non-gas flow direct ablation area and an emission field plateau of the diversion trench, and the working condition of the area determines that the material has the following properties: good volume stability, no peeling damage in the repeated use process; the coating has good environmental adaptability and excellent construction performance in different seasons; good high temperature resistance, no crack and splash in the repeated use process, and the like. With regard to products used in the launder apparatus, water cooling of steel plates was used in the early days, followed by improvement to water cooling of refractory concrete. In order to overcome the defects of the design, through development and experience accumulation for many years, concrete mainly prepared by taking cement mortar and high-alumina bricks as main raw materials is mainly adopted at present. However, products prepared by the formula have the problems of large raw material fluctuation, poor construction performance, low strength and the like, and Chinese patent CN101475381A is improved on the basis of the products: the aggregate types and proportions of the products are not changed, and only the bonding agent is changed from single CA-60H cement to a mixed bonding agent which takes CA65 cement and monocalcium aluminate as main mineral phases so as to shorten the setting time and improve the strength. But the problems of large product quality fluctuation, higher cost and the like caused by high-alumina bricks and the like serving as raw materials are still not improved.
Therefore, further research on heat-resistant concrete for the non-gas flow direct ablation area of the diversion trench and the launching pad is necessary.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide the heat-resistant concrete which has excellent product performance and high cost performance and reduces carbon emission.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a heat-resistant concrete comprising forsterite, calcium aluminate cement and an admixture; the forsterite is a grade ingredient, wherein the grade ingredient comprises, by mass, 22-26% of the forsterite with the particle size of 5-8mm, 22-26% of the forsterite with the particle size of 3-5mm, 30-34% of the forsterite with the particle size of 1-3mm, and 18-22% of the forsterite with the particle size of less than 1 mm.
The invention uses forsterite as a main raw material (a natural forsterite mineral, MgO-SiO) 2 -Fe 2 O 3 System material) is used in a specific grading mode, and is matched with an overall component formula, so that the obtained product has high performance uniformity, high strength and low ablation rate, and can meet the requirements of a rocket diversion trench non-gas flow direct ablation area and launching field level application. And sintering raw materials are avoided, carbon emission is reduced, and the environmental protection of product production is improved.
Preferably, in the ingredient, the proportion of the grain size is 24% of 5-8mm, the proportion of the grain size is 24% of 3-5mm, the proportion of the grain size is 32% of 1-3mm, and the proportion of the grain size is 20% of 1mm or less.
In the invention, the mass ratio of the forsterite to the calcium aluminate cement is (4-6): 1.
preferably, the mass ratio of the forsterite to the calcium aluminate cement is 5: 1, so as to be more beneficial to improving the strength of the product.
The invention comprises the following components in parts by weight: 70-90 parts of forsterite, 10-30 parts of calcium aluminate cement and 0.1-0.3 part of an additive.
Preferably, the composition comprises the following components in parts by weight: 75 parts of forsterite, 25 parts of calcium aluminate cement and 0.3 part of an additive.
The invention ensures the comprehensive effect of the product by reasonable component proportion.
In the invention, the forsterite contains 40-50% of MgO and SiO by mass percent 2 40-45% of Fe 2 O 3 0-10% of Al 2 O 3 The content is between 0 and 2 percent, the phase is olivine phase, the water absorption rate is more than or equal to 3.0 percent, and the volume density is between 2.70 and 2.80cm 3 Between/g.
In the invention, the additive is one or more of sodium tripolyphosphate, sodium hexametaphosphate or sulfonate.
For example, the additive can be sodium tripolyphosphate and sodium hexametaphosphate which are mixed according to the mass ratio of 1: 1.
The invention also provides a method for preparing the heat-resistant concrete, which comprises the steps of mixing the forsterite, the calcium aluminate cement and the additive, and then adding water for mixing.
The invention also provides application of the heat-resistant concrete in preparation of a rocket diversion trench non-gas flow direct ablation area and a launching field.
The invention has the beneficial effects that:
(1) the invention optimizes the grain composition, improves the construction performance of the material, shortens the construction period and improves the uniformity of the product.
(2) The natural forsterite particles are used for replacing sintering raw materials, the raw materials of the product are natural and easy to obtain, the cost performance is higher, and the carbon emission is favorably reduced.
(3) The product has high strength and good volume stability, and can meet the use requirements of a non-gas flow direct ablation area of a diversion trench and an emission field level.
(4) By effectively introducing the hardening regulator, the hardening time of the material can be adjusted according to the field condition.
Detailed Description
Preferred embodiments of the present invention will be described in detail with reference to the following examples. It is to be understood that the following examples are given for illustrative purposes only and are not intended to limit the scope of the present invention. Various modifications and alterations of this invention will become apparent to those skilled in the art without departing from the spirit and scope of this invention.
The experimental procedures used in the following examples are all conventional procedures unless otherwise specified. Materials, reagents and the like used in the following examples are commercially available unless otherwise specified.
In the specific embodiment of the invention, the forsterite is used, and the MgO content is 46.7% and the SiO content is calculated by mass percent 2 43.5% Fe 2 O 3 5.0% of Al 2 O 3 The content is 1.8%, the phase is olivine phase, the water absorption rate is 3.5%, and the bulk density is 2.75%cm 3 /g。
Example 1
This example provides a heat-resistant concrete comprising, by weight, 75 parts of forsterite raw material particles, 25 parts of pure calcium aluminate cement, 0.3 part of an additive, and 7.8 parts of water.
The additive is prepared by mixing sodium tripolyphosphate and sodium hexametaphosphate according to the mass ratio of 1: 1.
The forsterite raw material particles comprise 24% of particles with a diameter of 5-8mm, 24% of particles with a diameter of 3-5mm, 32% of particles with a diameter of 1-3mm and 20% of particles with a diameter of less than 1 mm.
Weighing the forsterite, the pure calcium aluminate cement and the additive, putting the weighed forsterite, the pure calcium aluminate cement and the additive into a stirrer, stirring the mixture for 1min by using a forced stirrer, then adding water, stirring the mixture for 3min to form a material with certain construction performance, forming the material in a specific die according to the requirements of industrial detection standards (YB/T5200 + 1993 and GB/T3001 + 2007), and detecting the strength and the ablation performance of the sample at 1d, 3d, 7d and 28d after the sample is formed and is subjected to corresponding treatment such as natural curing, demoulding and the like. The results are shown in Table 1. Therefore, the scheme of the invention has low ablation rate and good high-temperature resistance.
TABLE 1
Example 2
This example provides a heat-resistant concrete of the present invention, which is prepared in the same manner as in example 1, except that it comprises, in parts by weight, 80 parts of forsterite raw material particles, 20 parts of pure calcium aluminate cement, 0.25 part of an admixture, and 8.0 parts of water. The rest of the parts not specifically described are the same as those in example 1.
The performance test was performed by the method of example 1, and the test results are shown in table 2, from which it can be seen that the scheme of the present invention has a low ablation rate and excellent performance.
TABLE 2
Example 3
This example provides a heat-resistant concrete of the present invention, which is prepared in the same manner as in example 1, except that 85 parts by weight of forsterite raw material particles, 15 parts by weight of pure calcium aluminate cement, 0.25 part by weight of an admixture, and 8.3 parts by weight of water are included. The rest of the parts not specifically described are the same as those in example 1.
The performance test was performed by the method of example 1, and the test results are shown in table 3.
TABLE 3
Comparative example 1
This comparative example provides a heat-resistant concrete which is the same as the production method of example 1 except that the proportion of the forsterite raw material particles having a particle diameter of 5 to 10mm is 38%, the proportion of the particles having a particle diameter of 2.5 to 5mm is 32%, and the proportion of the particles having a particle diameter of 2.5mm or less is 30%.
The performance test was performed by the method of example 1, and the test results are shown in table 4. It is understood that the ablation rate is significantly increased and the high temperature resistance is lowered.
TABLE 4
Comparative example 2
This comparative example provides a heat-resistant concrete, which is the same as the preparation method of example 1 except that 93 parts by weight of forsterite raw material particles, 8 parts by weight of pure calcium aluminate cement, 0.25 part by weight of an admixture, and 10.5 parts by weight of water are included, which is the same as the preparation method of example 1.
The performance test was performed by the method of example 1, and the test results are shown in table 5. It is known that the strength and the ablatability are significantly reduced, and the erosion is rapidly accelerated in practical use.
TABLE 5
Although the invention has been described in detail hereinabove with respect to a general description and specific embodiments thereof, it will be apparent to those skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (10)
1. The heat-resistant concrete is characterized by comprising forsterite, calcium aluminate cement and an additive; the forsterite is a grade ingredient, wherein in the grade ingredient, the proportion of particles with the particle size of 5-8mm is 22-26%, the proportion of particles with the particle size of 3-5mm is 22-26%, the proportion of particles with the particle size of 1-3mm is 30-34%, and the proportion of particles with the particle size of less than 1mm is 18-22%.
2. The heat-resistant concrete according to claim 1, wherein the fraction has a 24% grain size of 5-8mm, a 24% grain size of 3-5mm, a 32% grain size of 1-3mm, and a 20% grain size of 1mm or less.
3. The heat-resistant concrete according to claim 1 or 2, wherein the mass ratio of the forsterite to the calcium aluminate cement is (4-6): 1.
4. the heat-resistant concrete according to claim 3, wherein the mass ratio of the forsterite to the calcium aluminate cement is 5: 1.
5. the heat-resistant concrete according to claim 3 or 4, characterized by comprising, in parts by weight: 70-90 parts of forsterite, 10-30 parts of calcium aluminate cement and 0.1-0.3 part of an additive.
6. The heat-resistant concrete according to claim 5, comprising, in parts by weight: 75 parts of forsterite, 25 parts of calcium aluminate cement and 0.3 part of an additive.
7. The heat-resistant concrete according to any one of claims 1 to 6, wherein the forsterite has a MgO content of 40 to 50% by mass and SiO 2 40-45% of Fe 2 O 3 0-10% of Al 2 O 3 The content is between 0 and 2 percent, the phase is olivine phase, the water absorption rate is more than or equal to 3.0 percent, and the volume density is between 2.70 and 2.80cm 3 Between/g.
8. The heat-resistant concrete according to any one of claims 1 to 7, wherein the additive is one or more of sodium tripolyphosphate, sodium hexametaphosphate or sulfonate.
9. A method of producing a heat resistant concrete according to any one of claims 1 to 8 wherein forsterite, calcium aluminate cement and admixtures are mixed and then mixed with water.
10. Use of the heat-resistant concrete according to any one of claims 1 to 8 for the production of rocket diversion trench non-gas flow direct ablation areas and launching aprons.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210689506.2A CN115108791A (en) | 2022-06-16 | 2022-06-16 | Heat-resistant concrete and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210689506.2A CN115108791A (en) | 2022-06-16 | 2022-06-16 | Heat-resistant concrete and preparation method and application thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115108791A true CN115108791A (en) | 2022-09-27 |
Family
ID=83328987
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210689506.2A Pending CN115108791A (en) | 2022-06-16 | 2022-06-16 | Heat-resistant concrete and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115108791A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101475381A (en) * | 2008-01-04 | 2009-07-08 | 郑州登峰熔料有限公司 | Diversion trench high-strength low ablation rate castable concrete for launching rocket |
| US20090227442A1 (en) * | 2006-02-20 | 2009-09-10 | Klischat Hans-Juergen | Fire-resistant ordinary ceramic batch, and fire-resistant product therefrom |
| CN102617165A (en) * | 2012-03-28 | 2012-08-01 | 宜兴新威利成耐火材料有限公司 | Forsterite fireproof castable |
| CN106316433A (en) * | 2016-08-31 | 2017-01-11 | 浙江科屹耐火材料有限公司 | Unshaped refractory and preparation method thereof |
| CN113149576A (en) * | 2021-04-21 | 2021-07-23 | 北京金隅通达耐火技术有限公司 | Mullite heat-resistant concrete for rocket diversion trench |
| CN114380580A (en) * | 2021-12-29 | 2022-04-22 | 北京金隅通达耐火技术有限公司 | Corundum heat-resistant concrete with low ablation rate and preparation method and application thereof |
-
2022
- 2022-06-16 CN CN202210689506.2A patent/CN115108791A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090227442A1 (en) * | 2006-02-20 | 2009-09-10 | Klischat Hans-Juergen | Fire-resistant ordinary ceramic batch, and fire-resistant product therefrom |
| CN101475381A (en) * | 2008-01-04 | 2009-07-08 | 郑州登峰熔料有限公司 | Diversion trench high-strength low ablation rate castable concrete for launching rocket |
| CN102617165A (en) * | 2012-03-28 | 2012-08-01 | 宜兴新威利成耐火材料有限公司 | Forsterite fireproof castable |
| CN106316433A (en) * | 2016-08-31 | 2017-01-11 | 浙江科屹耐火材料有限公司 | Unshaped refractory and preparation method thereof |
| CN113149576A (en) * | 2021-04-21 | 2021-07-23 | 北京金隅通达耐火技术有限公司 | Mullite heat-resistant concrete for rocket diversion trench |
| CN114380580A (en) * | 2021-12-29 | 2022-04-22 | 北京金隅通达耐火技术有限公司 | Corundum heat-resistant concrete with low ablation rate and preparation method and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110041028A (en) | A kind of regeneration concrete and preparation method thereof using building waste | |
| CN109896808B (en) | Magnesium silicate system gel material prepared based on magnesite tailings and application thereof | |
| CN109437766B (en) | Reactive powder concrete suitable for road and bridge engineering | |
| CN112851259A (en) | Self-compacting concrete and preparation method thereof | |
| CN107382346B (en) | refractory wear-resistant pouring material and preparation method thereof | |
| CN110218055B (en) | Low-sulfur-content negative-temperature sleeve grouting material and preparation method thereof | |
| CN110950591A (en) | Anti-permeability high-strength concrete and preparation method thereof | |
| CN109851374A (en) | Explosion-proof, long-life bottom brick of molten tin bath and preparation method thereof | |
| CN113773028A (en) | Geopolymer concrete and preparation method thereof | |
| CN113149576A (en) | Mullite heat-resistant concrete for rocket diversion trench | |
| CN102351501A (en) | Cement-based grouting material and preparation method thereof | |
| CN106904980A (en) | A kind of magnesium aluminum spinel pouring material of blast furnace iron outlet groove slag corrosion resistance | |
| CN109704620B (en) | Concrete admixture suitable for cold and dry environment and preparation method and application thereof | |
| CN107311675B (en) | A kind of air brick and preparation method thereof by the preparation of industry byproduct aluminium chromium slag | |
| CN110563376B (en) | Concrete reinforcing agent suitable for being prepared from machine-made sand and preparation method of mother liquor of concrete reinforcing agent | |
| CN114276096A (en) | Dry mixing material for square-material type inorganic artificial stone, inorganic artificial stone and preparation method | |
| CN110577382B (en) | C25 super slump retaining concrete | |
| CN110451881B (en) | Self-compacting cement concrete doped with Bayer process red mud and preparation method thereof | |
| CN104387096A (en) | Corundum spinel unburned brick for smelting steel ladle and preparation method of corundum spinel unburned brick | |
| CN109095802B (en) | Expansive agent for concrete, concrete and preparation method thereof | |
| CN115108791A (en) | Heat-resistant concrete and preparation method and application thereof | |
| CN111484341B (en) | Retarding composite water reducing agent for silica-free refractory self-flowing castable and preparation method thereof | |
| CN115925305A (en) | Reinforcing material suitable for recycled concrete and application method thereof | |
| CN114763302B (en) | Refractory castable for lime spray gun and preparation method and application thereof | |
| CN107840586B (en) | Clinker-free non-shrinkage cement containing rich silicon magnesium nickel slag and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220927 |
|
| RJ01 | Rejection of invention patent application after publication |