Concrete surface treating agent as well as preparation method and application method thereof
By using concrete surface treatment agent of specific components, the solidification time of concrete surface layer and the uniformity of coating is improved, the problem of poor coating uniformity of concrete surface retarder in the prior art is solved, and better decorative effect is achieved and Surface consistency.
Patent Information
- Application Number
- CN202411382948.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2025-02-07
AI Technical Summary
The coating uniformity of existing concrete surface retarders during construction is poor, resulting in poor consistency of concrete surface treatment effect and affecting the decorative effect.
The concrete surface treatment agent is adopted that includes aliphatic hydroxy acids and their salts, sodium dihydrogen phosphate, polyoxyethylene surfactants, aliphatic sulfate and their salts, alkyl polyglucosides and other components, and the components are passed through the Synergistically, it delays the solidification time of concrete surfaces and improves coating uniformity and water resistance.
Effectively delay the solidification time of concrete surface layer, improve the coating uniformity and water resistance of concrete surface treatment agents, and improve the consistency and decorative effect of concrete surfaces.
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of surface retarders, in particular to a concrete surface treatment agent and a preparation method and an application method thereof. Background Art
[0002] Exposed aggregate decorative concrete is a kind of decorative concrete that exposes aggregate by removing the concrete surface slurry. Due to its unique appearance and performance, it is widely used in various landscape projects, such as landscape projects, sidewalks, courtyards, commercial areas, theme parks, etc. Exposed aggregate decorative concrete not only has good decorative properties, but also has good decorative durability due to the stable color of the aggregate and the characteristics of not being easily polluted.
[0003] Generally speaking, the order of concrete solidification is from the surface to the inside, that is, the concrete surface will solidify before the concrete interior. In order to achieve the effect of showing the aggregate, the exposed aggregate decorative concrete needs to use a surface retarder to delay the solidification time of the concrete surface before the concrete is completely hardened, so that the aggregate in the concrete is properly exposed, thereby showing the natural color, particle shape, texture and arrangement of the aggregate, and achieving a certain decorative effect.
[0004] However, the surface retarders currently available on the market have poor uniformity in coating on the concrete surface. During the construction process, it is difficult for construction workers to achieve a uniform effect when spraying or rolling the concrete surface retarder, resulting in poor consistency in the concrete surface treatment effect and affecting the decorative effect. Summary of the invention
[0005] The purpose of the present invention is to provide a concrete surface treatment agent and a preparation method and application method thereof, wherein the concrete surface treatment agent can slow down the hydration reaction rate of concrete surface slurry and has little effect on the strength of concrete itself. The concrete surface treatment agent also has good coating uniformity, water resistance and weather resistance.
[0006] According to one aspect of the present invention, a concrete surface treatment agent is provided. Calculated by mass percentage, the concrete surface treatment agent includes 0.5-10wt% of a first component, 0.2-2wt% of a second component and 3-20wt% of a third component; the first component includes at least one of aliphatic hydroxy acids and salts thereof and sodium dihydrogen phosphate, the second component includes at least one of polyoxyethylene surfactants, aliphatic sulfates and salts thereof, and alkyl polyglucoside, and the third component includes at least one of polyvinyl alcohol, polyvinyl ester, polyvinyl acetate, ethylene-vinyl acetate copolymer, acrylic resin, polyacrylate, polyurethane, methyl cellulose, and hydroxypropyl methyl cellulose.
[0007] This solution can effectively delay the solidification time of the concrete surface layer by using the above-mentioned concrete surface treatment agent to construct the surface of the concrete, thereby changing the solidification order of the concrete, so that when the interior of the concrete has completely solidified, the concrete surface is still in an operable state, so as to facilitate the removal of the concrete surface slurry, thereby revealing the aggregate and having better decorative properties.
[0008] The concrete surface treatment agent that meets the above-mentioned formula composition requirements can effectively slow down the hydration reaction rate of concrete, and the concrete surface treatment agent has good coating uniformity, water resistance and weather resistance, and can improve the surface consistency of concrete. Among them, the first component of the concrete surface treatment agent includes two parts: aliphatic hydroxy acid and its salt, and sodium dihydrogen phosphate. The aliphatic hydroxy acid and its salt react with calcium ions in the concrete to chelate and complex, thereby effectively slowing down the hydration reaction of the concrete, thereby delaying the strength of the concrete surface; and sodium dihydrogen phosphate changes the pH value and ion concentration of the concrete surface, thereby extending the induction period of the concrete hydration reaction, thereby slowing down the solidification rate of the concrete surface. The combination of aliphatic hydroxy acid and its salt and sodium dihydrogen phosphate as the first component is conducive to synergistically improving the retarding effect of the concrete surface treatment agent on the concrete surface slurry, and can improve the stability of the concrete surface treatment agent in different application environments. The second component of the concrete surface treatment agent can improve the coating uniformity of the first component, and is conducive to improving the penetration and wetting effect of the concrete surface treatment agent. The third component of the concrete surface treatment agent can form a film on the concrete surface, which can not only slow down the evaporation rate of water on the concrete surface, thereby delaying the solidification time of the surface, but also improve the water resistance and weather resistance of the concrete surface treatment agent.
[0009] Preferably, the first component includes at least one of glucose, malic acid, citric acid, acetic acid, tartaric acid, lactic acid, succinic acid, sodium gluconate, sodium citrate, sodium tartrate and sodium dihydrogen phosphate; and / or the second component includes at least one of nonylphenol polyoxyethylene ether, polyoxyethylene ether, fatty alcohol polyoxyethylene ether, polyoxyethylene acrylamide, alkylbenzene sulfonate, sodium lauryl sulfate, alkyl sulfate sodium salt, and alkyl polyglucoside.
[0010] Preferably, the first component includes citric acid, tartaric acid and sodium dihydrogen phosphate. The combination of citric acid, tartaric acid and sodium dihydrogen phosphate is selected as the first component. There is a synergistic effect between the three components, which has a strong retarding effect on concrete, prolongs the setting time of the concrete surface, helps to achieve complete solidification inside the concrete, and has high strength and stable structure. However, the incomplete solidification of the concrete surface is easy to remove, which helps to expose the surface aggregate smoothly and form a good decorative effect.
[0011] Preferably, the mass ratio of citric acid, tartaric acid and sodium dihydrogen phosphate is 0.1-4:0.1-4:0.3-2.
[0012] Preferably, the mass ratio of citric acid, tartaric acid and sodium dihydrogen phosphate is 0.2-2:0.2-2:0.3-1.
[0013] Preferably, the second component includes fatty alcohol polyoxyethylene ether. Selecting fatty alcohol polyoxyethylene ether as the second component can improve the dispersibility and coating effect of the concrete surface treatment agent, so that the concrete surface treatment agent can be evenly covered on the concrete surface, thereby avoiding the situation where the aggregate is exposed too deeply or too shallowly on the local surface of the concrete, improving the quality and effect of the surface treatment, and ensuring that the aggregate on the concrete surface is evenly exposed. In addition, the concrete surface treatment agent including fatty alcohol polyoxyethylene ether has a lower surface tension, which can enhance the adhesion of the concrete surface treatment agent to the concrete surface, that is, improve the anti-sagging performance, and further improve the uniformity of the concrete surface treatment by the concrete surface treatment agent. In addition, when the first component includes citric acid, tartaric acid and sodium dihydrogen phosphate, and fatty alcohol polyoxyethylene ether is selected as the second component, the first component, the third component and the second component have good compatibility, which can further promote the uniform dispersion of the first component on the concrete surface.
[0014] Preferably, the third component includes polyacrylate. The concrete surface treatment agent using polyacrylate has good film-forming properties and can form a dense protective film on the concrete surface, which is not only conducive to preventing the water on the concrete surface from evaporating too quickly and delaying the solidification time of the surface, but also provides additional mechanical protection to prevent damage to the surface during construction. Moreover, the protective film formed by the concrete surface treatment agent can improve the stability of the concrete surface treatment agent under extreme climatic conditions, that is, improve water resistance and weather resistance. As a result, the concrete surface treatment agent has stable performance and high controllability under different application conditions, effectively reducing the difficulty of construction.
[0015] Preferably, the concrete surface treatment agent further comprises at least one of a tackifier, a moisturizer, a light stabilizer, a preservative, and a color paste.
[0016] Preferably, calculated by mass percentage, the concrete surface treatment agent includes 1.5 wt % of the first component, 1.0 wt % of the second component and 6 wt % of the third component.
[0017] According to another aspect of the present invention, a method for preparing the above concrete surface treatment agent is provided, comprising the following operations: uniformly mixing the first component, the second component, the third component and the solvent to prepare the concrete surface treatment agent.
[0018] According to another aspect of the present invention, there is provided a method for applying the above-mentioned concrete surface treatment agent, which is characterized in that it includes the following operations: before the concrete is completely cured, applying the concrete surface treatment agent on the concrete surface, drying, and then standing until the concrete surface reaches the expected exposed depth, and finally removing the above-mentioned concrete surface treatment agent and part of the slurry on the concrete surface. DETAILED DESCRIPTION
[0019] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.
[0020] Example 1
[0021] This embodiment provides a concrete surface treatment agent, including the following components: 1.5 wt % of a first component, 1.0 wt % of a second component, 6 wt % of a third component, and the remainder being a solvent.
[0022] The first component uses citric acid, tartaric acid and sodium dihydrogen phosphate in a mass ratio of 0.5:1.0:1.0; the second component uses fatty alcohol polyoxyethylene ether; and the third component uses polyacrylate. Among them, citric acid and tartaric acid are both aliphatic hydroxy acids, and fatty alcohol polyoxyethylene ether is a polyoxyethylene surfactant.
[0023] In this embodiment, according to actual application, an additive can be introduced into the concrete surface treatment agent, and the additive includes at least one of a tackifier, a moisturizer, a light stabilizer, a preservative, and a color paste. After the additive is introduced, the amount of the solvent added is adjusted to maintain the mass ratio of the first component, the second component, and the third component.
[0024] According to the above raw material composition, the concrete surface treatment agent is prepared according to the following steps: the raw materials for preparing the concrete surface treatment agent are mixed evenly to prepare the concrete surface treatment agent.
[0025] Example 2
[0026] This embodiment refers to the preparation method provided in Example 1 to prepare a concrete surface treatment agent. The difference between this embodiment and Example 1 is that in the process of preparing the concrete surface treatment agent, citric acid of equal mass is used to replace the tartaric acid used in Example 1, that is, the first component includes tartaric acid and sodium dihydrogen phosphate. The remaining raw material ratios and preparation methods are strictly consistent with those in Example 1.
[0027] Example 3
[0028] This embodiment refers to the preparation method provided in Example 1 to prepare a concrete surface treatment agent. The difference between this embodiment and Example 1 is that in the process of preparing the concrete surface treatment agent, tartaric acid of equal mass is used to replace the citric acid used in Example 1, that is, the first component includes citric acid and sodium dihydrogen phosphate. The remaining raw material ratios and preparation methods are strictly consistent with those in Example 1.
[0029] Example 4
[0030] This embodiment refers to the preparation method provided in Example 1 to prepare a concrete surface treatment agent. The difference between this embodiment and Example 1 is that in the process of preparing the concrete surface treatment agent, acetic acid of equal mass is used to replace the citric acid and tartaric acid used in Example 1, that is, the first component includes acetic acid and sodium dihydrogen phosphate. The remaining raw material ratios and preparation methods are strictly consistent with those in Example 1.
[0031] Example 5
[0032] This example prepares a concrete surface treatment agent by referring to the preparation method provided in Example 1. The difference between this example and Example 1 is that in the process of preparing the concrete surface treatment agent, an equal mass of sodium dodecyl sulfate is used to replace the second component used in Example 1. The rest of the raw material ratios and preparation methods are strictly consistent with those in Example 1.
[0033] Example 6
[0034] This example refers to the preparation method provided in Example 1 to prepare a concrete surface treatment agent. The difference between this example and Example 1 is that in the process of preparing the concrete surface treatment agent, an equal mass of alkyl polyglucoside is used to replace the second component used in Example 1. The remaining raw material ratios and preparation methods are strictly consistent with those in Example 1.
[0035] Example 7
[0036] This embodiment refers to the preparation method provided in Example 1 to prepare a concrete surface treatment agent. The difference between this embodiment and Example 1 is that in the process of preparing the concrete surface treatment agent, polyvinyl acetate of equal mass is used to replace the third component used in Example 1. The rest of the raw material ratios and preparation methods are strictly consistent with those in Example 1.
[0037] Example 8
[0038] This example prepares a concrete surface treatment agent by referring to the preparation method provided in Example 1. The difference between this example and Example 1 is that in the process of preparing the concrete surface treatment agent, methyl cellulose of equal mass is used to replace the third component used in Example 1. The rest of the raw material ratios and preparation methods are strictly consistent with those in Example 1.
[0039] Example 9
[0040] This embodiment refers to the preparation method provided in Example 1 to prepare a concrete surface treatment agent. The difference between this embodiment and Example 1 is that: in the process of preparing the concrete surface treatment agent, the feeding amount of the solvent and the first component, the second component, and the third component is adjusted so that the concrete surface treatment agent includes 0.5wt% of the first component, 0.2wt% of the second component, and 20wt% of the third component. The rest of the raw material ratios and the preparation method are strictly consistent with those in Example 1.
[0041] Example 10
[0042] This embodiment refers to the preparation method provided in Example 1 to prepare a concrete surface treatment agent. The difference between this embodiment and Example 1 is that: in the process of preparing the concrete surface treatment agent, the feeding amount of the solvent and the first component, the second component, and the third component is adjusted so that the concrete surface treatment agent includes 10wt% of the first component, 2wt% of the second component, and 3wt% of the third component. The remaining raw material ratios and preparation methods are strictly consistent with those in Example 1.
[0043] Comparative Example 1
[0044] This comparative example refers to the preparation method provided in Example 1 to prepare a concrete surface treatment agent. The difference between this comparative example and Example 1 is that in the process of preparing the concrete surface treatment agent, an equal mass of citric acid is used to replace the first component used in Example 1. The rest of the raw material ratios and preparation methods are strictly consistent with Example 1.
[0045] Comparative Example 2
[0046] This comparative example refers to the preparation method provided in Example 1 to prepare a concrete surface treatment agent. The difference between this comparative example and Example 1 is that in the process of preparing the concrete surface treatment agent, an equal mass of sodium dihydrogen phosphate is used to replace the first component used in Example 1. The remaining raw material ratios and preparation methods are strictly consistent with those in Example 1.
[0047] Comparative Example 3
[0048] This comparative example refers to the preparation method provided in Example 1 to prepare a concrete surface treatment agent. The difference between this comparative example and Example 1 is that: in the process of preparing the concrete surface treatment agent, the feeding amount of the solvent and the first component is adjusted so that the concrete surface treatment agent includes 15wt% of the first component. The rest of the raw material ratios and the preparation method are strictly consistent with Example 1.
[0049] Comparative Example 4
[0050] This comparative example refers to the preparation method provided in Example 1 to prepare a concrete surface treatment agent. The difference between this comparative example and Example 1 is that: in the process of preparing the concrete surface treatment agent, the feeding amount of the solvent and the third component is adjusted so that the concrete surface treatment agent includes 2wt% of the third component. The rest of the raw material ratios and the preparation method are strictly consistent with Example 1.
[0051] Comparative Example 5
[0052] This comparative example refers to the preparation method provided in Example 1 to prepare a concrete surface treatment agent. The difference between this comparative example and Example 1 is that: in the process of preparing the concrete surface treatment agent, the feeding amount of the solvent and the third component is adjusted so that the concrete surface treatment agent includes 30wt% of the third component. The rest of the raw material ratios and the preparation method are strictly consistent with Example 1.
[0053] Test Case
[0054] Test object: the concrete surface treatment agents provided in Examples 1 to 10 and Comparative Examples 1 to 5.
[0055] Test items and test methods:
[0056] (1) Slow setting time:
[0057] Blank group: Apply concrete slurry on the test surface, dry it, and then let it stand at 25°C, and record the normal setting time T of the concrete. 1 ;
[0058] Experimental group: Apply concrete slurry on the test surface, then apply concrete surface treatment agent on the surface of concrete slurry, dry, and then stand at 25℃. When the local area of the concrete surface solidifies, record the solidification time T of the concrete surface. 2 .
[0059] Slow setting time = setting time T of the concrete surface in the experimental group 2 - Conventional coagulation time T in the blank group 1 .
[0060] (2) Adhesion: The test objects were evenly applied on a vertically placed glass plate and left for 30 min. The maximum distance over which the retarder flowed on the concrete surface on the glass plate was measured.
[0061] (3) Smoothness: First, apply concrete slurry on the horizontal test surface, then apply concrete surface treatment agent on the concrete surface, dry, then stand in an environment of 25℃±5℃ for 8 hours, and finally use a high-pressure water gun to wash the concrete surface to remove the concrete surface treatment agent and part of the slurry on the concrete surface. Repeat the washing until no concrete particles fall off. Observe the smoothness of the concrete surface after washing with the naked eye.
[0062] (4) Antifreeze grade: Refer to GB50164-2011 Concrete Quality Control Standard and test the concrete surface treated with concrete surface treatment agent. The specific treatment operation should be consistent with the treatment operation in the smoothness test and the antifreeze grade should be recorded.
[0063] Test results: as shown in Table 1.
[0064] Table 1. Performance test results of this test case
[0065] Group Slow setting time (hours) Adhesion(mm) Smoothness Frost resistance level Example 1 12 0.0 smooth F200 Example 2 10.5 0.5 smooth F200 Example 3 11 0.8 smooth F200 Example 4 9.5 1.0 smooth F200 Example 5 11.5 1.5 smooth F200 Example 6 11.5 1.3 smooth F200 Example 7 10 0.8 smooth F100 Example 8 10 0.9 smooth F100 Example 9 11 0.5 smooth F200 Example 10 11 0.3 smooth F150 Comparative Example 1 9 2.4 Rough F100 Comparative Example 2 9 2.5 Rough F100 Comparative Example 3 8.5 2.0 Rough F100 Comparative Example 4 9 1.9 Rough F50 Comparative Example 5 8.5 2.2 Rough F100
[0066] Result analysis:
[0067] By comparing the test results of Examples 1 to 10 with those of Comparative Examples 1 to 2, it can be seen that, compared with the performance indicators measured in Comparative Examples 1 to 2, the retarding time measured in Examples 1 to 10 is longer, and the smoothness of the concrete surface after treatment is also better, which shows that, compared with the concrete surface treatment agent prepared by using only aliphatic hydroxy acids and their salts as the first component, or only sodium dihydrogen phosphate as the first component, the combination of sodium dihydrogen phosphate and aliphatic hydroxy acids and their salts as the first component can improve the retarding time measured by the concrete surface treatment agent, that is, improve the retarding effect of the concrete surface treatment agent on the concrete surface slurry, that is, there is a synergistic effect between sodium dihydrogen phosphate and aliphatic hydroxy acids and their salts.
[0068] By comparing the test results of Examples 1 to 10 with those of Comparative Examples 3 to 5, it can be seen that when the concrete surface treatment agent includes 0.5 to 10 wt% of the first component, 0.2 to 2 wt% of the second component and 3 to 20 wt% of the third component, the concrete surface treatment agent has a long coagulation time and good adhesion. After the concrete surface slurry is treated with the concrete surface treatment agent, the concrete surface has good smoothness and good frost resistance.
[0069] Further, by comparing the test results measured in Examples 1 to 4, it can be seen that when citric acid, tartaric acid and sodium dihydrogen phosphate are used as the first component, the coagulation time of the concrete surface treatment agent is longer, that is, the slow setting effect is better. Comparing the test results measured in Example 1 with those measured in Examples 5 to 6, it can be seen that the adhesion of Example 1 is better than that of Examples 5 to 6. In addition, although the smoothness performance of Examples 1 and 5 to 6 in Table 1 is recorded as flat, in the actual test process, through naked eye observation and hand feel, it can be found that the smoothness of Example 1 is better than that of Examples 5 to 6. This shows that when the second component includes fatty alcohol polyoxyethylene ether, the dispersibility and coating effect of the concrete surface treatment agent can be improved. Comparing the test results measured in Example 1 with those measured in Examples 7 to 8, it can be seen that the antifreeze grade measured in Example 1 is better than the antifreeze grade of Examples 7 to 8, which shows that when the third component includes polyacrylate, the concrete surface treated with concrete surface slurry by the concrete surface treatment agent has better durability.
[0070] Secondly, it should be noted that the longer the retarding time shown in Table 1, the better the retarding effect of the concrete surface treatment agent on the concrete slurry; in the process of testing the adhesion, the smaller the measured maximum flow distance, the better the adhesion and anti-sagging performance of the concrete surface treatment agent, and it is easier to achieve a uniform coating effect during the construction process; the higher the antifreeze grade shown in Table 1, the better the weather resistance and durability of the concrete surface after treatment with the concrete surface treatment agent, which shows the effect of the concrete surface treatment agent on the strength of the concrete.
[0071] The above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.
Claims
1. A concrete surface treatment agent, characterized in that: Calculated by weight percentage, the concrete surface treatment agent includes 0.5-10wt% of a first component, 0.2-2wt% of a second component and 3-20wt% of a third component; The first component includes at least one of aliphatic hydroxy acid and salt thereof and sodium dihydrogen phosphate; The second component includes at least one of a polyoxyethylene surfactant, a sulfate surfactant, and an alkyl polyglucoside; The third component includes at least one of polyvinyl alcohol, polyvinyl ester, polyvinyl acetate, ethylene-vinyl acetate copolymer, acrylic resin, polyacrylate, polyurethane, methyl cellulose, and hydroxypropyl methyl cellulose.
2. The concrete surface treatment agent according to claim 1, characterized in that: The first component includes at least one of glucose, malic acid, citric acid, acetic acid, tartaric acid, lactic acid, succinic acid, sodium gluconate, sodium citrate, sodium tartrate and sodium dihydrogen phosphate; and / or the second component includes at least one of nonylphenol polyoxyethylene ether, polyoxyethylene ether, fatty alcohol polyoxyethylene ether, polyoxyethylene acrylamide, alkylbenzene sulfonate, sodium dodecyl sulfate, alkyl sulfate sodium salt, and alkyl polyglucoside.
3. The concrete surface treatment agent according to claim 1, characterized in that: The first component includes citric acid, tartaric acid and sodium dihydrogen phosphate.
4. The concrete surface treatment agent according to claim 3, characterized in that: The mass ratio of the citric acid, the tartaric acid and the sodium dihydrogen phosphate is 0.1-4:0.1-4:0.3-2.
5. The concrete surface treatment agent according to claim 1, characterized in that: The second component includes fatty alcohol polyoxyethylene ether.
6. The concrete surface treatment agent according to claim 1, characterized in that: The third component includes polyacrylate.
7. The concrete surface treatment agent according to claim 1, characterized in that: The composition also includes at least one of a tackifier, a moisturizer, a light stabilizer, a preservative, and a color paste.
8. The concrete surface treatment agent according to any one of claims 1 to 7, characterized in that: Calculated by mass percentage, the concrete surface treatment agent includes 1.5 wt % of the first component, 1.0 wt % of the second component and 6 wt % of the third component.
9. A method for preparing the concrete surface treatment agent according to any one of claims 1 to 8, characterized in that: The method comprises the following operations: uniformly mixing the first component, the second component, the third component and a solvent to prepare the concrete surface treatment agent.
10. A method for applying the concrete surface treatment agent according to any one of claims 1 to 8, characterized in that: The following operations are included: Before the concrete slurry is completely cured, the concrete surface treatment agent is applied on the surface of the concrete slurry, dried, and then left to stand until the concrete surface reaches the expected exposed depth, and finally the concrete surface treatment agent and part of the slurry on the concrete surface are removed.