A ceramic slurry, its preparation method and application

Abstract

This invention relates to the field of concrete technology, specifically disclosing a ceramic slurry, its preparation method, and its application. The ceramic slurry comprises 70%–80% ceramic polishing slurry, 0.5%–1.0% dispersant, 0.03%–0.07% defoamer, 0.1%–0.2% suspending agent, and the balance being water; wherein the dispersant includes hexaethylene glycol, maltodextrin, and sodium polystyrene sulfonate. The method for preparing the ceramic slurry involves mixing the components thoroughly. The application of the ceramic slurry involves adding it to concrete. This application significantly reduces the energy consumption and environmental pollution caused by the secondary treatment of ceramic polishing slurry. Furthermore, the ceramic slurry prepared in this application possesses a good activity index and can replace slag powder and fly ash in concrete, reducing cement usage while significantly improving the overall performance of concrete, thereby enhancing the quality of construction projects.

Description

Technical Field

[0001] This invention relates to the field of concrete technology, and in particular to a ceramic slurry, its preparation method, and its application. Background Technology

[0002] Ceramic polishing slurry is the waste slurry generated during the grinding and polishing process of ceramic polishing bricks. It is a solid-liquid mixture containing abundant waste ceramic powder from the grinding and polishing process. This waste ceramic powder has fine particles, a high specific surface area, and certain pozzolanic activity. It also contains a small amount of glassy phase. Using it as an auxiliary cementitious material in concrete has a certain theoretical basis and demonstrates good feasibility in the concrete industry.

[0003] To apply ceramic polishing slurry to the concrete industry and reduce resource waste, current technologies typically involve a series of secondary treatments, such as pressure filtration and drying, to further extract waste ceramic powder from the slurry. This waste ceramic powder is then incorporated into the concrete to replace some of the fly ash and mineral powder. However, the pressure filtration and drying processes for ceramic polishing slurry consume significant amounts of energy, and because the waste ceramic powder particles are extremely fine, they easily diffuse into the air during the drying process, generating substantial amounts of air pollutants.

[0004] Therefore, the applicant believes it is necessary to explore a new treatment method for ceramic polishing slurry to reduce the energy consumption and environmental pollution caused by the secondary treatment of ceramic polishing slurry. Summary of the Invention

[0005] To reduce energy consumption and environmental pollution during the secondary treatment of ceramic polishing slurry, this application provides a ceramic slurry, its preparation method, and its application. This application obtains a ceramic slurry that can be directly added to concrete through simple mixing, stirring, and heating of the ceramic polishing slurry, eliminating the process steps of preparing dried ceramic polishing brick powder in existing technologies. This significantly reduces energy consumption and environmental pollution during the secondary treatment of ceramic polishing slurry. Furthermore, the ceramic slurry prepared in this application has a good activity index and can replace slag powder and fly ash in concrete, reducing cement usage while significantly improving the overall performance of concrete, thereby enhancing the quality of construction projects.

[0006] Firstly, the ceramic slurry provided in this application adopts the following technical solution:

[0007] A ceramic slurry comprising the following components in weight percentages:

[0008] Ceramic polishing slurry: 70%–80%;

[0009] Dispersant: 0.5%–1.0%;

[0010] Defoamer: 0.03%–0.07%;

[0011] Suspension agent: 0.1%–0.2%;

[0012] The remainder is water;

[0013] The dispersant includes hexaethylene glycol, maltodextrin, and sodium polystyrene sulfonate.

[0014] In the above technical solution, this application adds hexaethylene glycol, maltodextrin, and sodium polystyrene sulfonate to the ceramic slurry. Hexaethylene glycol and maltodextrin promote the more stable adhesion of sodium polystyrene sulfonate to the ceramic powder and further reduce the interfacial tension between the ceramic powder and other substances in the ceramic slurry. This achieves the effect of significantly and uniformly dispersing the ceramic powder in the ceramic slurry and reducing the agglomeration of ceramic powder in the ceramic slurry. This further refines the ceramic powder particles in the ceramic slurry, further increases the specific surface area of ​​the ceramic slurry, and improves the activity index of the ceramic slurry. Adding such a ceramic slurry to concrete can effectively reduce the interfacial tension between various substances in the concrete, improve the compatibility of various substances in the concrete, increase the fluidity of the concrete, better promote the full hydration of the concrete, enhance the bonding strength of the concrete, and further improve the comprehensive performance of the concrete.

[0015] Preferably, the dispersant is composed of hexaethylene glycol, maltodextrin and sodium polystyrene sulfonate, wherein the mass ratio of hexaethylene glycol, maltodextrin and sodium polystyrene sulfonate is (20-30):(5-10):(10-15).

[0016] Preferably, the mass ratio of hexaethylene glycol, maltodextrin, and sodium polystyrene sulfonate is 20:10:10.

[0017] In the above technical solution, by further limiting the dispersant to consist of hexaethylene glycol, maltodextrin and sodium polystyrene sulfonate, further limiting the amount of hexaethylene glycol, maltodextrin and sodium polystyrene sulfonate added to the ceramic slurry, further reducing the interfacial tension of each component in the ceramic slurry, further increasing the specific surface area of ​​the ceramic slurry, and further improving the activity index of the ceramic slurry.

[0018] Preferably, the suspending agent is prepared by mixing polyvinyl alcohol and triethylene glycol diacrylate at 80-85°C, wherein the mass ratio of polyvinyl alcohol to triethylene glycol diacrylate is 1:(10-12).

[0019] In the above technical solution, a suspending agent is added to the ceramic slurry. The suspending agent is composed of polyvinyl alcohol and triethylene glycol diacrylate mixed at 80-85°C with a mass ratio of 1:(10-12). Through the interaction of polyvinyl alcohol and triethylene glycol diacrylate in the ceramic slurry, the polyvinyl alcohol and triethylene glycol diacrylate are uniformly attached to the surface of the ceramic powder and fill the micropores in the ceramic powder. The ceramic powder has a certain degree of hydrophobicity. Combined with a dispersant composed of hexaethylene glycol, maltodextrin, and sodium polystyrene sulfonate, the ceramic powder can be more stably dispersed and suspended in the ceramic slurry, further increasing the specific surface area and activity index of the ceramic slurry. At the same time, such a ceramic slurry still has good dispersibility after long-term standing, which is more conducive to the subsequent concrete preparation. It avoids the need to re-stir the ceramic slurry separately when preparing concrete, further simplifying the concrete preparation process.

[0020] Preferably, the defoamer is a polyether-type defoamer.

[0021] In the above technical solution, by further specifying that the defoamer is a polyether-type defoamer, it can effectively eliminate air bubbles in the ceramic slurry. Adding such ceramic slurry to concrete can further inhibit the generation of air bubbles in the concrete, further reduce the porosity inside the concrete, further compact the concrete, and further enhance the mechanical strength of the concrete.

[0022] Secondly, this application provides a method for preparing ceramic slurry using the following technical solution:

[0023] A method for preparing ceramic slurry involves first mixing ceramic polishing mud and water evenly, then heating the mixture to 70-75°C while stirring, and then sequentially adding a dispersant, a suspending agent, and a defoamer. After stirring evenly, the mixture is cooled to room temperature to obtain the ceramic slurry.

[0024] In the above technical solution, by first mixing ceramic polishing slurry and water evenly, most of the ceramic powder is dispersed in the water during the mixing process. Then, by heating the system to 70-75°C, the added dispersant can better act on the ceramic powder and further disperse the ceramic powder in the system. Then, a suspending agent is added to further promote the stable dispersion and suspension of the ceramic powder in the system. Finally, a defoamer is added for defoaming treatment, resulting in a ceramic slurry with a good activity index.

[0025] Preferably, the stirring conditions are 20-30 r / min, the mixing time of the polishing slurry and water is 3-5 min, and the stirring time after adding the dispersant, defoamer and suspending agent is 1-2 min.

[0026] In the above technical solution, by further restricting the stirring conditions, the dispersion of various substances in the ceramic slurry is ensured to be more uniform.

[0027] Thirdly, this application provides a technical solution for the application of ceramic slurry, which adopts the following approach:

[0028] An application of ceramic slurry, wherein the ceramic slurry described in the first aspect of this application is added to concrete.

[0029] In the above technical solution, by adding the ceramic slurry prepared in this application to concrete, the ceramic slurry prepared in this application has a good activity index and can well replace slag powder and fly ash. It can reduce the amount of cement used while also improving the overall performance of concrete, thereby improving the quality of construction projects.

[0030] In summary, this application includes at least one of the following beneficial technical effects:

[0031] 1. This application adds hexaethylene glycol, maltodextrin, and sodium polystyrene sulfonate to the ceramic slurry. Hexaethylene glycol and maltodextrin promote the more stable adhesion of sodium polystyrene sulfonate to the ceramic powder and further reduce the interfacial tension between the ceramic powder and other substances in the ceramic slurry. This achieves the effect of significantly and uniformly dispersing the ceramic powder in the ceramic slurry and reducing the agglomeration of ceramic powder in the ceramic slurry. This further refines the ceramic powder particles in the ceramic slurry, further increases the specific surface area of ​​the ceramic slurry, and improves the activity index of the ceramic slurry. Adding such a ceramic slurry to concrete can effectively reduce the interfacial tension between various substances in the concrete, improve the compatibility of various substances in the concrete, increase the fluidity of the concrete, better promote the full hydration of the concrete, enhance the bonding strength of the concrete, and further improve the comprehensive performance of the concrete.

[0032] 2. This application adds a suspending agent to the ceramic slurry. The suspending agent is composed of polyvinyl alcohol and triethylene glycol diacrylate mixed at 80-85°C with a mass ratio of 1:(10-12). Through the interaction of polyvinyl alcohol and triethylene glycol diacrylate in the ceramic slurry, the polyvinyl alcohol and triethylene glycol diacrylate are uniformly adhered to the surface of the ceramic powder and fill the micropores in the ceramic powder. The ceramic powder has a certain degree of hydrophobicity, which allows it to be more stably dispersed and suspended in the ceramic slurry, further increasing the specific surface area and activity index of the ceramic slurry. At the same time, such a ceramic slurry still has good dispersibility after long-term standing, which is more conducive to the subsequent concrete preparation. It avoids the need for separate re-mixing of the ceramic slurry when preparing concrete, further simplifying the concrete preparation process. Detailed Implementation

[0033] To better illustrate the purpose, technical solution, and advantages of the present invention, the present invention will be further described below in conjunction with specific embodiments.

[0034] Example 1

[0035] A ceramic slurry comprises 70 kg of ceramic polishing mud, 0.5 kg of dispersant, 0.03 kg of defoamer, 0.1 kg of suspending agent and 29.37 kg of water.

[0036] The dispersant is a mixture of hexaethylene glycol, maltodextrin, and sodium polystyrene sulfonate.

[0037] The mass ratio of hexaethylene glycol, maltodextrin, and sodium polystyrene sulfonate is 20:5:10.

[0038] The defoamer is a polyether-type defoamer, purchased from Jinan Yutao Chemical Co., Ltd., model YT-1800.

[0039] The suspending agent is sodium carboxymethyl cellulose.

[0040] The method for preparing ceramic slurry includes the following steps:

[0041] Step 1: First, mix the ceramic polishing slurry with water and stir for 3 minutes at 30 rpm.

[0042] Step 2: Heat the solution obtained in Step 1 to 75°C while stirring at 30 r / min. Add the dispersant, suspending agent and defoamer in sequence while stirring. Continue stirring for 1 min and then cool to room temperature to obtain the ceramic slurry.

[0043] Example 2

[0044] A ceramic slurry, unlike Example 1, comprises 80 kg of ceramic polishing slurry, 1 kg of dispersant, 0.07 kg of defoamer, 0.2 kg of suspending agent, and 18.73 kg of water.

[0045] The dispersant is a mixture of hexaethylene glycol, maltodextrin, and sodium polystyrene sulfonate.

[0046] The mass ratio of hexaethylene glycol, maltodextrin, and sodium polystyrene sulfonate is 30:10:15.

[0047] The method for preparing ceramic slurry includes the following steps:

[0048] Step 1: First, mix the ceramic polishing slurry with water and stir for 5 minutes at 20 rpm.

[0049] Step 2: Heat the solution obtained in Step 1 to 70°C while stirring at 20 r / min. Add the dispersant, suspending agent and defoamer in sequence while stirring. Continue stirring for 2 minutes and then cool to room temperature to obtain the ceramic slurry.

[0050] Example 3

[0051] A ceramic slurry, unlike Example 1, comprises 70 kg of ceramic polishing slurry, 0.8 kg of dispersant, 0.05 kg of defoamer, 0.15 kg of suspending agent, and 29 kg of water.

[0052] The dispersant is a mixture of hexaethylene glycol, maltodextrin, and sodium polystyrene sulfonate.

[0053] The mass ratio of hexaethylene glycol, maltodextrin, and sodium polystyrene sulfonate is 20:10:10.

[0054] Example 4

[0055] A ceramic slurry, unlike Example 3, uses polyvinyl alcohol and triethylene glycol diacrylate as the suspending agent.

[0056] The mass ratio of polyvinyl alcohol to triethylene glycol diacrylate is 1:10.

[0057] The suspending agent is formed by mixing polyvinyl alcohol and triethylene glycol diacrylate at 80°C.

[0058] Example 5

[0059] A ceramic slurry, unlike Example 4, has a mass ratio of polyvinyl alcohol and triethylene glycol diacrylate of 1:12.

[0060] The suspending agent is formed by mixing polyvinyl alcohol and triethylene glycol diacrylate at 85°C.

[0061] Example 6

[0062] A ceramic slurry, unlike Example 4, in which triethylene glycol diacrylate is replaced in equal amounts with polyvinyl alcohol.

[0063] Comparative Example 1

[0064] A ceramic slurry, which differs from Example 3 in that the dispersant is a mixture of maltodextrin and sodium polystyrene sulfonate.

[0065] The mass ratio of maltodextrin to sodium polystyrene sulfonate is 10:10.

[0066] Comparative Example 2

[0067] A ceramic slurry, which differs from Example 3 in that the dispersant is a mixture of hexaethylene glycol and sodium polystyrene sulfonate.

[0068] The mass ratio of hexaethylene glycol to sodium polystyrene sulfonate is 20:10.

[0069] Comparative Example 3

[0070] A ceramic slurry, which differs from Example 3 in that the dispersant is sodium polystyrene sulfonate.

[0071] Application Example 1

[0072] A type of concrete comprising 205 kg of cement, 150 kg of ceramic slurry, 160 kg of water, 775 kg of sand, and 1070 kg of crushed stone with a particle size of 16-20 mm.

[0073] The ceramic slurry was from Example 1.

[0074] The cement used is China Resources Cement P.O42.5R ordinary Portland cement.

[0075] The concrete preparation method is as follows: Cement, ceramic slurry, water, sand, and crushed stone are mixed and stirred evenly to obtain concrete.

[0076] Application Example 2

[0077] A type of concrete, unlike Application Example 1, uses ceramic slurry derived from Example 2.

[0078] Application Example 3

[0079] A type of concrete, unlike Application Example 1, uses ceramic slurry derived from Example 3.

[0080] Application Example 4

[0081] A type of concrete, unlike Application Example 1, uses ceramic slurry from Example 4.

[0082] Application Example 5

[0083] A type of concrete, unlike Application Example 1, uses ceramic slurry derived from Example 5.

[0084] Application Example 6

[0085] A type of concrete, unlike Application Example 1, uses ceramic slurry derived from Example 6.

[0086] Comparative Application Example 1

[0087] In one type of concrete, unlike Application Example 1, the ceramic slurry is derived from Comparative Example 1.

[0088] Comparative Application Example 2

[0089] In one type of concrete, unlike Application Example 1, the ceramic slurry was derived from Comparative Example 2.

[0090] Comparative Application Example 3

[0091] In one type of concrete, unlike Application Example 1, the ceramic slurry was derived from Comparative Example 3.

[0092] Comparative Application Example 4

[0093] A type of concrete, unlike Application Example 1, comprises 205 kg of cement, 60 kg of S95 mineral powder, 75 kg of fly ash, 160 kg of water, 775 kg of sand, and 1070 kg of crushed stone with a particle size of 16-20 mm.

[0094] Comparative Application Example 5

[0095] A type of concrete, unlike Application Example 1, comprises 205 kg of cement, 60 kg of ceramic slurry, 75 kg of fly ash, 160 kg of water, 775 kg of sand, and 1070 kg of crushed stone with a particle size of 16-20 mm.

[0096] Comparative Application Example 6

[0097] A type of concrete, unlike Application Example 1, comprises 205 kg of cement, 60 kg of S95 mineral powder, 75 kg of ceramic slurry, 160 kg of water, 775 kg of sand, and 1070 kg of crushed stone with a particle size of 16-20 mm.

[0098] Performance testing

[0099] 1. The composition content of the ceramic slurry in Example 4 is shown in Table 1. The testing was conducted in accordance with CB / T 16537-2010, CB / T4734-1996, CB / T 14506.82-2010, and YS / T 509.1-2008.

[0100] Table 1:

[0101]

[0102]

[0103] 2. Stability Test

[0104] Test samples: ceramic slurries from the above embodiments and comparative examples.

[0105] (1) Heat resistance test: After being kept at 48±2℃ for 48h, the test samples were observed after returning to room temperature.

[0106] (2) Cold resistance test: After being kept at -18±2℃ for 48h, the test samples were observed after being restored to room temperature.

[0107] (3) Thermal cycling test: The samples were kept at 48℃, room temperature and -18℃ for 16 hours respectively, and observed after returning to room temperature.

[0108] The test results are shown in Table 2.

[0109] Table 2:

[0110]

[0111] Based on the analysis of Examples 1-6, Comparative Examples 1-3 and Table 2, it is easy to see that Examples 1-6 have good system stability.

[0112] In specific analysis of Example 3 and Comparative Examples 1-3, it is not difficult to see that by adding hexaethylene glycol, maltodextrin and sodium polystyrene sulfonate to the ceramic slurry, the stability of the ceramic slurry system can be well guaranteed by hexaethylene glycol and maltodextrin. The applicant believes that adding hexaethylene glycol, maltodextrin and sodium polystyrene sulfonate to the ceramic slurry can reduce the interfacial tension between the substances in the ceramic slurry and further improve the suspension stability and dispersibility of each substance.

[0113] In specific analysis of Examples 4-5 and Examples 3 and 6, it is not difficult to see that by adding a suspending agent made of polyvinyl alcohol and triethylene glycol diacrylate mixed at 80-85°C to the ceramic slurry, this application can further improve the hydrophobicity of the ceramic powder, so that the ceramic powder can be more stably dispersed and suspended in the ceramic slurry, and the ceramic slurry can still have good dispersibility after standing for a long time.

[0114] 3. Detection of activity index:

[0115] Test samples: ceramic slurries from the above embodiments and comparative examples.

[0116] Cement: China Resources Cement P.O42.5R ordinary Portland cement.

[0117] The activity index of slag powder was characterized according to the requirements of GB / T18046-2017. Slag powder was replaced with ceramic slurry, and mortar blocks were prepared according to the mass ratio of cement and ceramic slurry of 1:1. The compressive strength of the mortar blocks was tested on the 7th and 28th days, and the ratio of the compressive strength of the tested mortar blocks to that of pure cement mortar blocks at the same age was calculated. This ratio is the activity index. The test results of the activity index are shown in Table 3.

[0118] Table 3:

[0119]

[0120] Based on the analysis of Examples 1-6, Comparative Examples 1-3 and Table 2, it is easy to see that the ceramic slurry of Examples 1-6 has a good activity index and can appropriately replace cement, reducing the production cost of concrete while ensuring good overall performance of concrete.

[0121] Specifically, based on the analysis of Example 3 and Comparative Examples 1-3, it is easy to see that adding hexaethylene glycol, maltodextrin, and sodium polystyrene sulfonate as dispersants to the ceramic slurry can give the ceramic slurry a good activity index. However, adding sodium polystyrene sulfonate alone cannot achieve the same level of activity index. Therefore, only by adding hexaethylene glycol, maltodextrin, and sodium polystyrene sulfonate as dispersants to the ceramic slurry can the interfacial tension between the ceramic powder and other substances in the ceramic slurry be significantly reduced, the agglomeration of ceramic powder in the ceramic slurry be significantly reduced, the ceramic powder particles in the ceramic slurry be further refined, the specific surface area of ​​the ceramic slurry be further increased, and the activity index of the ceramic slurry be improved.

[0122] Specifically, based on the analysis of Examples 4-5 and Examples 3 and 6, it is not difficult to see that adding a suspending agent composed of polyvinyl alcohol and triethylene glycol diacrylate mixed at 80-85°C to the ceramic slurry can further improve the activity index of the ceramic slurry. However, adding polyvinyl alcohol alone cannot achieve the same effect on the activity index. Therefore, only by adding a suspending agent composed of polyvinyl alcohol and triethylene glycol diacrylate mixed at 80-85°C to the ceramic slurry can the activity index of the ceramic slurry be further improved.

[0123] 4. Compressive strength test

[0124] Test samples: Concrete from the above application examples and comparative application examples.

[0125] The compressive strength of concrete on the 7th, 28th and 56th days was tested in accordance with GB / T17671-2021 "Test Method for Strength of Cement Mortar (IOS Method)". The test results are shown in Table 4.

[0126] Table 4:

[0127]

[0128]

[0129] By combining the analysis of Application Examples 1-6 and comparing them with Application Examples 1-3, it is easy to see that the concrete in Application Examples 1-6 has good compressive strength. That is, the ceramic paste in Application Examples 1-6 has good dispersibility and activity index, which allows it to mix well with other components in the concrete. This reduces the interfacial tension between the various substances in the concrete, improves the compatibility of the various substances in the concrete, increases the fluidity of the concrete, better promotes the full hydration of the concrete, enhances the bond strength of the concrete, and further improves the strength of the concrete.

[0130] Based on the comparative analysis of application examples 4-6, it is easy to see that the ceramic slurry of this application can effectively replace S95 mineral powder and fly ash. The concrete with the ceramic slurry of this application has better strength at 28 days and 56 days than the concrete with fly ash.

[0131] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A ceramic slurry, characterized in that, Includes the following components by mass percentage: Ceramic polishing slurry: 70%~80%; Dispersant: 0.5%~1.0%; Defoamer: 0.03%~0.07%; Suspension agent: 0.1%~0.2%; The remainder is water; The dispersant includes hexaethylene glycol, maltodextrin, and sodium polystyrene sulfonate.

2. The ceramic slurry according to claim 1, characterized in that, The dispersant is composed of hexaethylene glycol, maltodextrin and sodium polystyrene sulfonate, and the mass ratio of hexaethylene glycol, maltodextrin and sodium polystyrene sulfonate is (20~30):(5~10):(10~15).

3. The ceramic slurry according to claim 2, characterized in that, The mass ratio of hexaethylene glycol, maltodextrin, and sodium polystyrene sulfonate is 20:10:

10.

4. The ceramic slurry according to claim 1, characterized in that, The suspending agent is prepared by mixing polyvinyl alcohol and triethylene glycol diacrylate at 80-85°C, wherein the mass ratio of polyvinyl alcohol to triethylene glycol diacrylate is 1:(10-12).

5. The ceramic slurry according to claim 1, characterized in that, The defoamer is a polyether-type defoamer.

6. A method for preparing a ceramic slurry as described in any one of claims 1 to 5, characterized in that, First, mix ceramic polishing slurry and water evenly, then heat to 70~75℃ while stirring. Add dispersant, suspending agent and defoamer in sequence, stir evenly and then cool to room temperature to obtain ceramic slurry.

7. A method for preparing a ceramic slurry according to claim 6, characterized in that, The stirring conditions are 20~30 r / min, the mixing time of polishing mud and water is 3~5 min, and the stirring time after adding dispersant, defoamer and suspending agent is 1~2 min.

8. An application of a ceramic slurry, characterized in that, The ceramic slurry according to any one of claims 1 to 5 is added to concrete.

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