CN110183202B - Baking-free ecological brick prepared from waste slurry of subway engineering and preparation method thereof - Google Patents
Baking-free ecological brick prepared from waste slurry of subway engineering and preparation method thereof Download PDFInfo
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- CN110183202B CN110183202B CN201910370364.1A CN201910370364A CN110183202B CN 110183202 B CN110183202 B CN 110183202B CN 201910370364 A CN201910370364 A CN 201910370364A CN 110183202 B CN110183202 B CN 110183202B
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- 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
- C04B28/34—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 cold phosphate binders
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- 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
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- 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
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- Ceramic Engineering (AREA)
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Abstract
The embodiment of the invention provides a baking-free ecological brick prepared from waste slurry of subway engineering and a preparation method thereof, which are used for solving the problem that the manufactured baking-free brick cannot meet the use standard due to too high water content of the waste slurry of the subway engineering in the prior art. The baking-free ecological brick comprises the following components in parts by weight: 60-80 parts of subway engineering waste slurry, 7.5-20 parts of dehydrating agent, 12-25 parts of potassium dihydrogen phosphate solution and 0.5-2.0 parts of borax. The method comprises the following steps: adding a dehydrating agent containing over-burnt magnesium oxide into the waste slurry of the subway engineering, and uniformly stirring to obtain a mixture A; adding a potassium dihydrogen phosphate aqueous solution and borax into the mixture A, and uniformly mixing to obtain a mixture B, wherein the water content of the mixture B is 22-30%; taking the mixture B, and extruding to prepare an initial brick block; and placing the initial bricks in an environment with the temperature of 18-22 ℃ and the RH being more than or equal to 65% for curing for several days to obtain the baking-free ecological bricks.
Description
Technical Field
The invention relates to the field of civil engineering, in particular to a baking-free ecological brick prepared from waste slurry in a subway engineering and a preparation method thereof.
Background
At present, a great amount of waste slurry produced in the urban subway engineering construction process is mainly transported by a mud tanker and discharged to a designated place to be stacked or treated, so that the pollution to the surrounding environment is caused, and the ecological development of a green city is not facilitated.
The novel wall material which is manufactured by using fly ash, coal cinder, coal gangue, tailing slag, chemical slag or natural sand, tidal marsh mud and the like (one or more than one of the raw materials) as main raw materials without high-temperature calcination is called as a baking-free brick. At present, the existing baking-free bricks are prepared by waste sludge, for example, a river sludge baking-free brick and a preparation method thereof are disclosed in a patent with the application number of CN 201810391111; patent application No. CN201610258695 discloses a dredged sludge non-sintered brick and a preparation method thereof; the patent with application number CN201610272095 discloses a process for manufacturing a sludge non-sintered brick, and the patent with application number CN201710510652 discloses a novel carbonized non-sintered brick prepared by using marine waste sludge and a preparation method thereof.
The applicant proposes to prepare the ecological baking-free brick by using the waste slurry of the subway engineering so as to realize the secondary utilization of the waste slurry of the subway engineering, thereby solving the problem of land occupation pollution of the waste slurry of the subway engineering. However, in the process of implementing the technical solution of the invention in the embodiment of the present application, the inventor of the present application finds that the above prior art has at least the following technical problems:
The water content of the waste slurry of the subway engineering is higher than 60 percent, even can reach 200 percent and is far higher than that of sludge, so that the manufactured baking-free brick can not reach the use standard.
Disclosure of Invention
The embodiment of the application provides a baking-free ecological brick prepared from waste slurry in subway engineering and a preparation method thereof, and aims to solve the problem that the baking-free brick prepared from the waste slurry in subway engineering in the prior art cannot reach the use standard due to too high water content. According to the embodiment of the application, the waste slurry of the subway engineering is solidified to form the baking-free brick by utilizing the reaction of the over-burnt magnesium oxide, the potassium dihydrogen phosphate and the water in the waste slurry of the subway engineering, so that the beneficial effect of preparing the baking-free brick which meets the application standard of enterprises from the waste slurry of the subway engineering is realized.
The technical scheme for solving the problems is as follows:
in a first aspect, an embodiment of the application provides a baking-free ecological brick prepared from waste slurry in a subway engineering, and the baking-free ecological brick comprises the following components in parts by weight: 60-80 parts of subway engineering waste slurry, 7.5-20 parts of dehydrating agent, 12-25 parts of potassium dihydrogen phosphate solution and 0.5-2.0 parts of borax.
Further, the mass concentration of the potassium dihydrogen phosphate aqueous solution is 25%.
Further, the dehydrating agent comprises the following components in parts by weight: 6-13.5 parts of over-fired magnesium oxide, 1-10 parts of desulfurized fly ash and 0.2-0.5 part of polyacrylamide.
Further, the particle size d distribution of the over-sintered magnesium oxide is as follows: d is more than 0.16mm and accounts for 2.9 percent, d is more than or equal to 0.08mm and less than or equal to 0.16mm and accounts for 37.2 percent, and d is less than 0.08mm and accounts for 59.9 percent.
Furthermore, the water ratio of the desulfurized fly ash is 106, SO3The mass content of (A) was 2.26%, and the loss on ignition was 1.02%.
On the other hand, the embodiment of the application provides a preparation method for preparing a baking-free ecological brick from waste slurry in a subway engineering, which comprises the following steps:
1) adding a dehydrating agent containing over-burnt magnesium oxide into the waste slurry of the subway engineering, and uniformly stirring to obtain a mixture A;
2) adding a potassium dihydrogen phosphate aqueous solution and borax into the mixture A, and uniformly mixing to obtain a mixture B, wherein the water content of the mixture B is 22-30%;
3) extruding the mixture B to prepare an initial brick;
4) and placing the initial bricks in an environment with the temperature of 18-22 ℃ and the RH being more than or equal to 65% for curing for several days to obtain the baking-free ecological bricks.
Further, placing the initial bricks in an environment with the temperature of 18-22 ℃ and RH being more than or equal to 65% for curing for 1-7 days to obtain the baking-free ecological bricks.
The invention has the following beneficial effects:
1. according to the embodiment of the application, the waste slurry of the subway engineering is dehydrated by utilizing the reaction of the over-burnt magnesium oxide, the monopotassium phosphate and the water in the waste slurry of the subway engineering to generate the gelled substance to solidify the waste slurry of the subway engineering to form the ecological baking-free brick, so that the problem that the manufactured baking-free brick cannot reach the use standard due to too high water content of the waste slurry of the subway engineering in the prior art is effectively solved, and the beneficial effect that the baking-free ecological brick meeting the enterprise application standard is prepared from the waste slurry of the subway engineering is realized.
2. The baking-free brick in the embodiment of the application has the advantages that the compressive strength is over 8MPa, the breaking strength is over 1.2MPa, the softening coefficient is over 0.85, the nitrogen and phosphorus removal rate can reach over 80%, the enterprise application standard is met, and the baking-free ecological brick in the embodiment of the application has certain degradation performance.
3. The baking-free ecological brick can contact with discharged sewage during service, and the over-burnt magnesia can also react with phosphate radicals and ammonium radicals of discharged sewage to form a stable product, and then reduce nitrogen and phosphorus content in the discharged sewage.
4. After the baking-free ecological brick in the embodiment of the application passes the service life, the baking-free ecological brick is crushed and is mixed with soil according to the weight ratio of 1: 1, the mixed planting of the grass, phosphorus and nitrogen consolidated in the baking-free brick can be used as nutrient elements for plant growth, and the brick has degradability.
5. In the embodiment of the application, the monopotassium phosphate aqueous solution is adopted to modify soil body particles and desulfurized fly ash in the waste slurry of the subway engineering, so that silicon-oxygen bonds and aluminum-oxygen bonds of the soil body particles and desulfurized fly ash are broken; after bond breaking, the hydration activity can be excited, and the active SiO of the surface of soil body particles and the desulfurized fly ash2、Al2O3And reacting with slurry water in an alkaline environment to form a microcrystal and gel structure, and further improving the capability of solidifying slurry, thereby preparing the baking-free ecological brick meeting the application standard of enterprises.
6. The borax can adjust the reaction speed of the monopotassium phosphate, the over-burnt magnesium oxide and the water, avoids violent reaction, enables the waste slurry of the subway engineering to be fully mixed with the dehydrating agent, and enables the waste slurry of the subway engineering to be fully dehydrated.
7. The particle size d distribution of the over-burned magnesium oxide described in the examples of the present application is as follows: 2.9 percent of d larger than 0.16mm, 37.2 percent of d not less than 0.08mm and not more than 0.16mm and 59.9 percent of d less than 0.08mm, so that the setting speed of the calcined magnesia, the monopotassium phosphate and the water in the subway engineering waste mud which react to generate the gelled substance to solidify the subway engineering waste mud is moderate.
8. The preparation method for preparing the baking-free ecological brick from the subway engineering waste slurry is simple in technical process, does not need large-scale calcining equipment, and has the environment-friendly effects of energy conservation, low carbon and the like.
9. The preparation method for preparing the baking-free ecological brick from the subway engineering waste slurry, which is provided by the embodiment of the application, takes the subway engineering waste slurry and the desulfurized fly ash as main raw materials of the baking-free ecological brick, and the waste is prepared from wastes, so that the resource utilization of the wastes is facilitated.
Detailed Description
The embodiment of the application provides a baking-free ecological brick prepared from waste slurry in subway engineering and a preparation method thereof, and aims to solve the problem that the baking-free brick prepared from the waste slurry in subway engineering in the prior art cannot reach the use standard due to too high water content.
In order to solve the technical problems, the technical scheme provided by the application has the following general idea: the unburned brick is formed by solidifying the waste slurry of the subway engineering by using a condensed substance generated by the reaction of the over-fired magnesium oxide, the monopotassium phosphate and the water in the waste slurry of the subway engineering, so that the beneficial effect of preparing the unburned ecological brick which meets the application standard of enterprises from the waste slurry of the subway engineering is realized. The technical solutions of the present application are described in detail below with reference to specific embodiments, and it should be understood that the specific features in the embodiments and examples of the present application are described in detail in the technical solutions of the present application, and are not limited to the technical solutions of the present application, and the technical features in the embodiments and examples of the present application may be combined with each other without conflict.
Example one
Weighing the following raw materials in proportion:
60 parts of subway engineering waste slurry, 13 parts of dehydrating agent, 25 parts of potassium dihydrogen phosphate solution and 2 parts of borax; wherein the dehydrating agent comprises the following components in parts by weight: 10 parts of over-sintered magnesium oxide, 2.8 parts of desulfurized fly ash and 0.2 part of polyacrylamide.
The preparation method of the baking-free ecological brick according to the preparation method of the baking-free ecological brick from the waste slurry of the subway engineering comprises the following steps:
1) adding the dehydrating agent into the waste slurry of the subway engineering, and uniformly stirring to obtain a mixture A;
2) adding a potassium dihydrogen phosphate aqueous solution and borax into the mixture A obtained in the step 1), and uniformly mixing to obtain a mixture B, wherein the water content of the mixture B is 25%;
3) taking the mixture B obtained in the step 2), and extruding the mixture B into standard initial bricks of 240mm multiplied by 115mm multiplied by 53mm by using a brick making machine;
4) and (3) placing the initial bricks obtained in the step 3) in an environment with the temperature of 18 ℃ and the RH (relative humidity) of 95% for curing for 7 days to obtain the unburned ecological bricks made of the waste subway mud.
The over-sintered magnesia is obtained by grinding dead-burned magnesia provided by Sunski burden refractory Co.
The potassium dihydrogen phosphate solution is prepared from industrial-grade potassium dihydrogen phosphate provided by a shingyang san da chemical plant, Ningbo into an aqueous solution with the mass concentration of 25%.
The borax is provided by Zhengzhou Yuonghua chemical company Limited, and the content is more than 98 percent.
The desulfurized fly ash is a sulfur byproduct provided by Ningfeng thermal power plant, and the water ratio is 106 and SO3The content is 2.26 percent and the ignition loss is 1.02 percent.
The polyacrylamide is quaternized polyacrylamide provided by Henan rhyme environmental protection science and technology limited.
Detecting the baking-free ecological brick prepared by the method for preparing the baking-free ecological brick from the waste slurry of the subway engineering: after 28 days, the compression strength of the baking-free ecological brick is 16MPa, the breaking strength is 3.0MPa, the softening coefficient is 0.92, and the nitrogen and phosphorus removal rate is 0.83; crushing the baking-free ecological bricks after 1 year, and mixing the crushed bricks with soil according to the proportion of 1: 1, the mixture is planted with grass, and the germination rate is 92 percent, which shows that the mixture has good degradability.
Example two
Weighing the following raw materials in proportion:
67.5 parts of subway engineering waste slurry, 20 parts of dehydrating agent, 12 parts of potassium dihydrogen phosphate solution and 0.5 part of borax; wherein the dehydrating agent comprises the following components in parts by weight: 9.7 parts of over-sintered magnesium oxide, 10 parts of desulfurized fly ash and 0.3 part of polyacrylamide.
The preparation method of the baking-free ecological brick according to the preparation method of the baking-free ecological brick from the waste slurry of the subway engineering comprises the following steps:
1) Adding the dehydrating agent into the waste slurry of the subway engineering, and uniformly stirring to obtain a mixture A;
2) adding a potassium dihydrogen phosphate aqueous solution and borax into the mixture A obtained in the step 1), and uniformly mixing to obtain a mixture B, wherein the water content of the mixture B is 20%;
3) taking the mixture B obtained in the step 2), and extruding the mixture B into standard initial bricks of 240mm multiplied by 115mm multiplied by 53mm by using a brick making machine;
4) and (3) placing the initial bricks obtained in the step 3) in an environment with the temperature of 18 ℃ and the RH (relative humidity) of 65% for curing for 1 day to obtain the unburned ecological bricks made of the waste subway mud.
The over-sintered magnesia is obtained by grinding dead-burned magnesia provided by Sunski burden refractory Co.
The potassium dihydrogen phosphate solution is prepared from industrial-grade potassium dihydrogen phosphate provided by a shingyang san da chemical plant, Ningbo into an aqueous solution with the mass concentration of 25%.
The borax is provided by Zhengzhou Yuonghua chemical company Limited, and the content is more than 98 percent.
The desulfurized fly ash is a sulfur byproduct provided by Ningfeng thermal power plant, and the water ratio is 106 and SO3The content is 2.26 percent and the ignition loss is 1.02 percent.
The polyacrylamide is quaternized polyacrylamide provided by Henan rhyme environmental protection science and technology limited.
Detecting the baking-free ecological brick prepared by the method for preparing the baking-free ecological brick from the waste slurry of the subway engineering: after 28 days, the compression strength of the baking-free ecological brick is 15MPa, the breaking strength is 2.8MPa, the softening coefficient is 0.90, and the nitrogen and phosphorus removal rate is 0.90; crushing the baking-free ecological bricks after 1 year, and mixing the crushed bricks with soil according to the proportion of 1: 1, the mixed planting grass has the sprouting rate of 86 percent, which shows that the mixed planting grass has good degradability.
EXAMPLE III
Weighing the following raw materials in proportion:
80 parts of subway engineering waste slurry, 7.5 parts of dehydrating agent, 12 parts of potassium dihydrogen phosphate solution and 0.5 part of borax; wherein the dehydrating agent comprises the following components in parts by weight: 6 parts of over-sintered magnesium oxide, 1 part of desulfurized fly ash and 0.5 part of polyacrylamide.
The preparation method of the baking-free ecological brick according to the preparation method of the baking-free ecological brick from the waste slurry of the subway engineering comprises the following steps:
1) adding the dehydrating agent into the waste slurry of the subway engineering, and uniformly stirring to obtain a mixture A;
2) adding a potassium dihydrogen phosphate aqueous solution and borax into the mixture A obtained in the step 1), and uniformly mixing to obtain a mixture B, wherein the water content of the mixture B is 30%;
3) taking the mixture B obtained in the step 2), and extruding the mixture B into standard initial bricks of 240mm multiplied by 115mm multiplied by 53mm by using a brick making machine;
4) And (3) placing the initial bricks obtained in the step 3) in an environment with the temperature of 20 ℃ and the RH (relative humidity) of 90% for curing for 7 days to obtain the unburned ecological bricks made of the waste subway mud.
The over-sintered magnesia is obtained by grinding dead-burned magnesia provided by Sunski burden refractory Co.
The potassium dihydrogen phosphate solution is prepared from industrial-grade potassium dihydrogen phosphate provided by a shingyang san da chemical plant, Ningbo into an aqueous solution with the mass concentration of 25%.
The borax is provided by Zhengzhou Yuonghua chemical company Limited, and the content is more than 98 percent.
The desulfurized fly ash is a sulfur byproduct provided by Ningfeng thermal power plant, and the water ratio is 106 and SO3The content is 2.26 percent and the ignition loss is 1.02 percent.
The polyacrylamide is quaternized polyacrylamide provided by Henan rhyme environmental protection science and technology limited.
Detecting the baking-free ecological brick prepared by the method for preparing the baking-free ecological brick from the waste slurry of the subway engineering: after 28 days, the compression strength of the baking-free ecological brick is 8MPa, the breaking strength is 1.3MPa, the softening coefficient is 0.86, and the nitrogen and phosphorus removal rate is 0.90; crushing the baking-free ecological bricks after 1 year, and mixing the crushed bricks with soil according to the proportion of 1: 1, the mixed planting grass has the germination rate of 100 percent, which shows that the mixed planting grass has good degradability.
Example four
Weighing the following raw materials in proportion:
60 parts of subway engineering waste slurry, 20 parts of dehydrating agent, 19 parts of potassium dihydrogen phosphate solution and 1 part of borax; wherein the dehydrating agent comprises the following components in parts by weight: 13.5 parts of over-sintered magnesium oxide, 6 parts of desulfurized fly ash and 0.5 part of polyacrylamide.
The preparation method of the baking-free ecological brick according to the preparation method of the baking-free ecological brick from the waste slurry of the subway engineering comprises the following steps:
1) adding the dehydrating agent into the waste slurry of the subway engineering, and uniformly stirring to obtain a mixture A;
2) adding a potassium dihydrogen phosphate aqueous solution and borax into the mixture A obtained in the step 1), and uniformly mixing to obtain a mixture B, wherein the water content of the mixture B is 22%;
3) taking the mixture B obtained in the step 2), and extruding the mixture B into standard initial bricks of 240mm multiplied by 115mm multiplied by 53mm by using a brick making machine;
4) and (3) placing the initial bricks obtained in the step 3) in an environment with the temperature of 22 ℃ and the RH (relative humidity) of 75% for curing for 3 days to obtain the unburned ecological bricks made of the waste subway mud.
The over-sintered magnesia is obtained by grinding dead-burned magnesia provided by Sunski burden refractory Co.
The potassium dihydrogen phosphate solution is prepared from industrial-grade potassium dihydrogen phosphate provided by a shingyang san da chemical plant, Ningbo into an aqueous solution with the mass concentration of 25%.
The borax is provided by Zhengzhou Yuonghua chemical company Limited, and the content is more than 98 percent.
The desulfurized fly ash is a sulfur byproduct provided by Ningfeng thermal power plant, and the water ratio is 106 and SO3The content is 2.26 percent and the ignition loss is 1.02 percent.
The polyacrylamide is quaternized polyacrylamide provided by Henan rhyme environmental protection science and technology limited.
Detecting the baking-free ecological brick prepared by the method for preparing the baking-free ecological brick from the waste slurry of the subway engineering: after 28 days, the compression strength of the baking-free ecological brick is 18MPa, the breaking strength is 3.2MPa, the softening coefficient is 0.96, and the nitrogen and phosphorus removal rate is 0.99; crushing the baking-free ecological bricks after 1 year, and mixing the crushed bricks with soil according to the proportion of 1: 1, the mixed planting grass has the sprouting rate of 88 percent, which shows that the mixed planting grass has good degradability.
The embodiments described in this specification are merely illustrative of implementations of the inventive concept and the scope of the present invention should not be considered limited to the specific forms set forth in the embodiments but includes equivalent technical means as would be recognized by those skilled in the art based on the inventive concept.
Claims (4)
1. The baking-free ecological brick prepared from the waste slurry in the subway engineering is characterized by comprising the following components in parts by weight: 60-80 parts of subway engineering waste slurry, 7.5-20 parts of dehydrating agent, 12-25 parts of potassium dihydrogen phosphate solution and 0.5-2.0 parts of borax;
The potassium dihydrogen phosphate solution is an aqueous solution with the mass concentration of 25 percent prepared from industrial-grade potassium dihydrogen phosphate;
the dehydrating agent comprises the following components in parts by weight: 6-13.5 parts of over-fired magnesium oxide, 1-10 parts of desulfurized fly ash and 0.2-0.5 part of polyacrylamide;
the preparation method of the baking-free ecological brick comprises the following steps:
1) adding a dehydrating agent containing over-burnt magnesium oxide into the waste slurry of the subway engineering, and uniformly stirring to obtain a mixture A;
2) adding a potassium dihydrogen phosphate aqueous solution and borax into the mixture A, and uniformly mixing to obtain a mixture B, wherein the water content of the mixture B is 22-30%;
3) extruding the mixture B to prepare an initial brick;
4) and placing the initial bricks in an environment with the temperature of 18-22 ℃ and the relative humidity RH being more than or equal to 65% for curing to obtain the baking-free ecological brick.
2. The unburned ecological brick prepared from the waste slurry of the subway engineering according to claim 1, wherein the particle size d distribution of the over-burned magnesia is as follows: d is more than 0.16mm and accounts for 2.9 percent, d is more than or equal to 0.08mm and less than or equal to 0.16mm and accounts for 37.2 percent, and d is less than 0.08mm and accounts for 59.9 percent.
3. The baking-free ecological brick prepared from the waste slurry of the subway engineering as claimed in claim 1, wherein said desulfurized fly ash has a water demand ratio of 106, SO 3The mass content of (A) was 2.26%, and the loss on ignition was 1.02%.
4. The baking-free ecological brick prepared from the waste slurry of the subway engineering according to claim 1, wherein: and placing the initial bricks in an environment with the temperature of 18-22 ℃ and the relative humidity RH being more than or equal to 65% for curing for 1-7 days to obtain the baking-free ecological bricks.
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| CN115521132A (en) * | 2022-05-17 | 2022-12-27 | 北京林业大学 | Preparation method of carbon-based ecological brick for slope protection |
| CN115432995B (en) * | 2022-06-28 | 2023-09-12 | 广州市北二环交通科技有限公司 | Porous brick prepared from engineering waste slurry |
| CN115946209B (en) * | 2022-12-08 | 2023-09-01 | 郑州宏瑞耐火材料有限公司 | Firing-free preparation method for refractory material |
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| JPH06107453A (en) * | 1992-09-24 | 1994-04-19 | Toshiba Ceramics Co Ltd | Non-burnt magnesia-carbon brick |
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| CN101863630A (en) * | 2010-07-02 | 2010-10-20 | 上海交通大学 | Gelled material for preparing baking-free bricks and preparation and application method thereof |
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| CN109049295A (en) * | 2018-08-17 | 2018-12-21 | 扬州大学 | A kind of potassium magnesium phosphate cement base ecology retaining wall block and preparation method thereof |
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