CN113636782A - Modified nano protective agent and preparation method and application thereof - Google Patents

Modified nano protective agent and preparation method and application thereof Download PDF

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Publication number
CN113636782A
CN113636782A CN202111030508.2A CN202111030508A CN113636782A CN 113636782 A CN113636782 A CN 113636782A CN 202111030508 A CN202111030508 A CN 202111030508A CN 113636782 A CN113636782 A CN 113636782A
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modified nano
agent
nano
modified
solution
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CN113636782B (en
Inventor
侯鹏坤
穆罕穆德·法沃德
王峥
陈衡
马霞
穆明浩
程新
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Innovation Research Institute Of Shandong Expressway Group Co ltd
University of Jinan
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Innovation Research Institute Of Shandong Expressway Group Co ltd
University of Jinan
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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
    • C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • C04B40/0028—Aspects relating to the mixing step of the mortar preparation
    • C04B40/0039—Premixtures of ingredients
    • 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

Abstract

The invention discloses a modified nano protective agent, a preparation method and application thereof, which are mainly used for concrete surface protection and functional modification. The modified nano protective agent comprises a modified nano hybrid, wherein the modified nano hybrid comprises a stabilizing agent, a lubricating agent, an emulsifying agent and a rheological control agent, the emulsifying agent is used for uniformly mixing all substances in the modified nano hybrid, the stability of the modified nano protective agent is enhanced, the lubricating agent is beneficial to obtaining concrete with high apparent quality, and the rheological control agent is used for controlling surface construction. The concrete surface stabilizer also comprises a nano reinforcing agent, and the stabilizing agent is used for stably solidifying the nano reinforcing agent and the base cement, so that the concrete surface has long-term functionality. The modified nano protective agent has good stability, is used as a protective material when concrete is poured, and has the advantages of good protective effect and small using amount.

Description

Modified nano protective agent and preparation method and application thereof
Technical Field
The invention relates to the field of building materials, in particular to a modified nano protective agent and a preparation method and application thereof.
Background
The concrete surface is the load-bearing part of the appearance of the structure, and the surface is also the first line of defense of the structure against external erosion. Therefore, the concrete surface can be enhanced to resist external erosion, the concrete appearance quality can be improved, the high performance of the concrete can be realized, the multifunctional structural characteristics of the concrete surface can be optimized, and the material cost is obviously reduced.
The surface quality of concrete is not only related to the aesthetic property, but also most critical to the overall durability index of the structure, and at present, people indirectly evaluate the corrosion resistance and the durability of the concrete by testing the chloride ion diffusion coefficient of the concrete structure. In the prior art, in order to improve the medium corrosion resistance and durability of the concrete surface, an anti-corrosion material is generally sprayed on the concrete surface after the concrete is poured, and the commonly used anti-corrosion material comprises an inorganic crystalline waterproof material and an organic hydrophobic material. Particularly, the problems of concrete shrinkage and cracking are caused by factors such as material composition refinement, insufficient maintenance, hydration temperature rise and the like, and the problems are more prominent on the surface of the concrete.
Disclosure of Invention
The invention aims to solve the problem that the performance of the anti-erosion material is easy to deteriorate after the anti-erosion material in the prior art is sprayed on the surface of a concrete structure, so that the surface of the concrete structure is invalid, and provides a modified nano protective agent, and a preparation method and application thereof.
To achieve these objects and other advantages of the present invention, there is provided a modified nano-protectant comprising a modified nano-hybrid comprising a stabilizer, a lubricant, an emulsifier, and a rheology-controlling agent; wherein the mass ratio of the stabilizing agent to the lubricating agent to the emulsifying agent to the rheological control agent is (2-5): (20-60): (5-10): (1-3).
Preferably, the modified nano protective agent further comprises a nano reinforcing agent, and the mass ratio of the modified nano hybrid to the nano reinforcing agent is (28-78): (2-16); the nano reinforcing agent is one of nano titanium oxide, nano aluminum oxide or nano iron oxide.
Preferably, the stabilizer is tetraethoxysilane.
Preferably, the lubricant is one of vegetable oil or mineral oil.
Preferably, the rheology control agent is one of a polycarboxylate or sulfamate water reducer.
Preferably, the emulsifier is a mixture of span 40, tween 80 and alkylphenol polyoxyethylene; the mass ratio of the span 40 to the tween 80 to the alkylphenol polyoxyethylene is 2:2: 1.
Preferably, the emulsifier is a mixture of span 80, tween 40 and sodium dodecyl benzene sulfonate; the mass ratio of the span 80 to the tween 40 to the sodium dodecyl benzene sulfonate is 1:1: 1.
Preferably, the preparation method of the modified nanometer protective agent comprises the following steps:
mixing a stabilizing agent, a lubricant and an emulsifier to obtain an auxiliary solution, mixing the auxiliary solution and a rheological control agent to obtain a modified nano hybrid solution, adding hydrochloric acid into the modified nano hybrid solution, and stirring for 2-4 hours to obtain a modified nano hybrid with a pH value of 4-6;
and step two, mixing the saturated calcium hydroxide solution with the modified nano hybrid in the step one, and stirring for 2-4 hours to obtain the modified nano protective agent with the pH value of 7.
Preferably, the preparation method of the modified nanometer protective agent comprises the following steps:
mixing a stabilizing agent, a lubricant and an emulsifier to obtain an auxiliary solution, mixing the auxiliary solution and a rheological control agent to obtain a modified nano hybrid solution, adding hydrochloric acid into the modified nano hybrid solution, and stirring for 2-4 hours to obtain a modified nano hybrid with a pH value of 4-6;
step two, mixing the modified nano hybrid in the step one with a nano reinforcing agent to obtain a modified nano reinforcing solution, and stirring the modified nano reinforcing solution at the temperature of 40-70 ℃ for 0.5-1 h to obtain a modified nano reinforcing substance;
and step three, mixing the saturated calcium hydroxide solution with the modified nano reinforcer in the step two, and stirring for 2-4 hours to obtain the modified nano protective agent with the pH value of 7.
Preferably, before the concrete is poured, the prepared modified nano protective agent is uniformly sprayed on the inner peripheral wall of the concrete template; wherein the coating amount of the modified nano protective agent is 20-30 g/m2。
The invention at least comprises the following beneficial effects:
1. according to the invention, the modified nano protective agent is sprayed on the concrete template before pouring, so that the modified nano protective agent is mixed and hybridized with the uncured basic cement, the concrete surface is modified and enhanced after solidification, and the corrosion-resistant concrete surface with good apparent quality can be obtained. The modified nano protective agent comprises a modified nano hybrid, wherein the modified nano hybrid comprises a stabilizing agent, a lubricating agent, an emulsifying agent and a rheological control agent, the emulsifying agent is used for uniformly mixing all substances in the modified nano hybrid, the stability of the modified nano protective agent is enhanced, the lubricating agent is beneficial to obtaining a concrete surface with good apparent quality, and the rheological control agent is used for controlling the surface construction of a concrete material. In addition, the modified nano protective agent also comprises a nano reinforcing agent, and the stabilizing agent is used for stably solidifying the nano reinforcing agent and the basic cement, so that the concrete surface has long-term functionality. The modified nano protective agent has good stability, is used as a protective material when concrete is poured, and has the advantages of good protective effect and small using amount.
2. The functional nano protective agent is prepared, and the function of the nano material is innovatively exerted on the surface of a concrete structure. The invention not only creatively solves the key price and dispersion problems of the application of the nano material in the cement concrete, but also enables the concrete structure to have photocatalysis and electromagnetic shielding functions by adding the nano reinforced material, further improves the high durability and functionality of the concrete, opens up an economic and effective practical application way of the nano technology in the cement-based material, effectively overcomes the bottleneck problem of the application of the existing nano material in the concrete structure, and provides a feasible material and a simple construction method for the engineering application.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Detailed Description
The present invention is described in further detail below to enable those skilled in the art to practice the invention with reference to the description.
The invention provides a modified nano protective agent and a preparation method and application thereof. Wherein the stabilizing agent is ethyl orthosilicate, the lubricant is one of vegetable oil or mineral oil, the rheological control agent is one of polycarboxylate or sulfamate water reducer, and the emulsifier is a mixture of span-40, tween-80 and alkylphenol polyoxyethylene or a mixture of span-80, tween-40 and sodium dodecyl benzene sulfonate. The modified nano protective agent also comprises a nano reinforcing agent, wherein the nano reinforcing agent is one of nano titanium oxide, nano aluminum oxide or nano iron oxide.
The preparation method A of the modified nano protective agent comprises the following steps:
mixing a stabilizing agent, a lubricant and an emulsifier to obtain an auxiliary solution, mixing the auxiliary solution and a rheological control agent to obtain a modified nano hybrid solution, adding hydrochloric acid into the modified nano hybrid solution, and stirring for 2-4 hours to obtain a modified nano hybrid with a pH value of 4-6;
and step two, mixing the saturated calcium hydroxide solution with the modified nano hybrid in the step one, and stirring for 2-4 hours to obtain the modified nano protective agent with the pH value of 7.
The preparation method B of the modified nano protective agent comprises the following steps:
mixing a stabilizing agent, a lubricant and an emulsifier to obtain an auxiliary solution, mixing the auxiliary solution and a rheological control agent to obtain a modified nano hybrid solution, adding hydrochloric acid into the modified nano hybrid solution, and stirring for 2-4 hours to obtain a modified nano hybrid with a pH value of 4-6;
step two, mixing the modified nano hybrid in the step one with a nano reinforcing agent to obtain a modified nano reinforcing solution, and stirring the modified nano reinforcing solution at the temperature of 40-70 ℃ for 0.5-1 h to obtain a modified nano reinforcing material;
and step three, mixing the saturated calcium hydroxide solution with the modified nano reinforcer in the step two, and stirring for 2-4 hours to obtain the modified nano protective agent with the pH value of 7.
The use method of the modified nano protective agent comprises the following steps: before concrete pouring, the modified nano protective agent prepared by the preparation method A or the preparation method B is uniformly sprayed on the inner peripheral wall of the concrete template.
Example 1:
the modified nano protective agent comprises a modified nano hybrid, and the modified nano hybrid comprises a stabilizing agent, a lubricating agent, an emulsifying agent and a rheological control agent. The modified nano protective agent comprises a stabilizer, a lubricant, a rheology control agent, a polycarboxylate water reducer, an emulsifier and a nano reinforcing agent, wherein the stabilizer is 2g of tetraethoxysilane, the lubricant is 20g of vegetable oil, the rheology control agent is 1g of polycarboxylate water reducer, the emulsifier is 5g of the mass, the emulsifier is a mixture of span 40, tween 80 and alkylphenol polyoxyethylene ether, the mass of span 40 in the mixture is 2g, the mass of tween 80 in the mixture is 2g, and the mass of alkylphenol polyoxyethylene ether in the mixture is 1 g.
The modified nano protective agent prepared by the preparation method B comprises the following steps:
dissolving 2g of tetraethoxysilane in 70g of distilled water to obtain a precursor solution, mixing and dissolving 20g of vegetable oil and 5g of emulsifier to obtain an auxiliary solution, mixing the precursor solution, the auxiliary solution and 1g of polycarboxylate water reducing agent in the emulsifier, wherein the weight of span 40 is 2g, the weight of tween 80 is 2g, and the weight of alkylphenol ethoxylate is 1g, to obtain a modified nano hybrid solution, adding 10 mass percent hydrochloric acid into the modified nano hybrid solution, and stirring for 2 hours to obtain a modified nano hybrid with a pH value of 4;
step two, mixing the modified nano hybrid obtained in the step one with 2g of nano alumina to obtain a modified nano enhanced solution, and stirring the modified nano enhanced solution at the temperature of 40 ℃ for 0.5h to obtain a modified nano enhanced substance;
and step three, mixing the saturated calcium hydroxide solution with the modified nano reinforcer in the step two, and stirring for 2 hours to obtain the modified nano protective agent with the pH value of 7.
The use method of the modified nano protective agent comprises the following steps: before concrete pouring, the modified nano protective agent is evenly sprayed on the inner peripheral wall of a concrete template, and the coating amount of the modified nano protective agent is 20g/m2。
Example 2:
the modified nano protective agent comprises a modified nano hybrid, and the modified nano hybrid comprises a stabilizing agent, a lubricating agent, an emulsifying agent and a rheological control agent. The modified nano protective agent comprises a stabilizer, a lubricant, a rheology control agent, a tween 80, alkylphenol ethoxylates and a nano reinforcing agent, wherein the stabilizer is 5g of ethyl orthosilicate, the lubricant is 60g of mineral oil, the rheology control agent is 3g of sulfamate water reducer, the mass of the emulsifier is 10g, the emulsifier is a mixture of the span 40, the tween 80 and the alkylphenol ethoxylates, the mass of the span 40 in the mixture is 4g, the mass of the tween 80 in the mixture is 4g, and the mass of the alkylphenol ethoxylates in the mixture is 2 g.
The modified nano protective agent prepared by the preparation method B comprises the following steps:
dissolving 5g of tetraethoxysilane in 6g of distilled water to obtain a precursor solution, mixing 60g of mineral oil with 10g of emulsifier to obtain an auxiliary solution, mixing the precursor solution, the auxiliary solution and 3g of sulfamate water reducer to obtain a modified nano hybrid solution, adding 10% by mass of hydrochloric acid into the modified nano hybrid solution, and stirring for 4 hours to obtain a modified nano hybrid with a pH value of 6, wherein the emulsifier comprises 4g of span 40, 4g of tween 80 and 2g of alkylphenol polyoxyethylene;
step two, mixing the modified nano hybrid obtained in the step one with 16g of nano titanium oxide to obtain a modified nano enhanced solution, and stirring the modified nano enhanced solution at the temperature of 70 ℃ for 1 hour to obtain a modified nano enhanced substance;
and step three, mixing the saturated calcium hydroxide solution with the modified nano reinforcer in the step two, and stirring for 3 hours to obtain the modified nano protective agent with the pH value of 7.
The use method of the modified nano protective agent comprises the following steps: before concrete pouring, the modified nano protective agent is evenly sprayed on the inner peripheral wall of a concrete template, and the coating amount of the modified nano protective agent is 25g/m2。
Example 3:
the modified nano protective agent comprises a modified nano hybrid, and the modified nano hybrid comprises a stabilizing agent, a lubricating agent, an emulsifying agent and a rheological control agent. The modified nano protective agent comprises a stabilizer, a lubricant, a rheology control agent, a polycarboxylate water reducer, an emulsifier and a nano reinforcing agent, wherein the stabilizer is 3.5g of tetraethoxysilane, the lubricant is 50g of mineral oil, the rheology control agent is 1.5g of polycarboxylate water reducer, the emulsifier is 9g in mass, the emulsifier is a mixture of span 80, tween 40 and sodium dodecyl benzene sulfonate, the span 80 in the mixture is 3g in mass, the tween 40 is 3g in mass, and the sodium dodecyl benzene sulfonate is 3g in mass, the modified nano protective agent further comprises a nano reinforcing agent, and the nano reinforcing agent is 10g of nano iron oxide.
The modified nano protective agent prepared by the preparation method B comprises the following steps:
dissolving 3.5g of tetraethoxysilane in 26g of distilled water to obtain a precursor solution, mixing and dissolving 50g of mineral oil and 9g of emulsifier to obtain an auxiliary solution, mixing the precursor solution, the auxiliary solution and 1.5g of polycarboxylate water reducing agent in the emulsifier, wherein the weight of span 80 is 3g, the weight of tween 40 is 3g, and the weight of sodium dodecyl benzene sulfonate is 3g to obtain a modified nano hybrid solution, adding 10 mass percent hydrochloric acid into the modified nano hybrid solution, and stirring for 5 hours to obtain a modified nano hybrid with the pH value of 5;
step two, mixing the modified nano hybrid obtained in the step one with 10g of nano iron oxide to obtain a modified nano enhanced solution, and stirring the modified nano enhanced solution at the temperature of 60 ℃ for 0.5h to obtain a modified nano enhanced substance;
and step three, mixing the saturated calcium hydroxide solution with the modified nano reinforcer in the step two, and stirring for 4 hours to obtain the modified nano protective agent with the pH value of 7.
The use method of the modified nano protective agent comprises the following steps: before concrete pouring, the modified nano protective agent is evenly sprayed on the inner peripheral wall of a concrete template, and the coating amount of the modified nano protective agent is 30g/m2。
Example 4:
the difference from example 1 is that the mass of the nano reinforcing agent in the modified nano protective agent is 0 g.
The difference from the embodiment 1 is that the modified nano protective agent prepared by the preparation method A comprises the following steps:
dissolving 2g of tetraethoxysilane in 70g of distilled water to obtain a precursor solution, mixing and dissolving 20g of vegetable oil and 5g of emulsifier to obtain an auxiliary solution, mixing the precursor solution, the auxiliary solution and 1g of polycarboxylate water reducing agent in the emulsifier, wherein the weight of span 40 is 2g, the weight of tween 80 is 2g, and the weight of alkylphenol ethoxylate is 1g, to obtain a modified nano hybrid solution, adding 10 mass percent hydrochloric acid into the modified nano hybrid solution, and stirring for 2 hours to obtain a modified nano hybrid with a pH value of 4;
and step two, mixing the saturated calcium hydroxide solution with the modified nano hybrid in the step one, and stirring for 2 hours to obtain the modified nano protective agent with the pH value of 7.
The use method of the modified nano protective agent comprises the following steps: before concrete pouring, the modified nano protective agent is evenly sprayed on the inner peripheral wall of a concrete template, and the coating amount of the modified nano protective agent is 20g/m2。
Comparative example 1:
before concrete pouring, the distilled water is evenly sprayed on the inner peripheral wall of the concrete template, and the coating amount of the distilled water is 20g/m2。
Comparative example 2:
the difference from the example 3 is that the mass of the firming agent ethyl orthosilicate in the modified nano protective agent is 0 g.
The concrete pouring raw material is standard cement, the standard cement meets the requirements of standard composite GB8076-2008, the Chinese ISO standard sand is adopted, the concrete is produced according to GB/T17671-1999, the concrete sample is poured according to the modes of the above examples 1-4 and the comparative examples 1-2, the mould is removed after the concrete is poured for 24 hours, the concrete is placed in a standard curing chamber for curing for 28 days, and the test is started after natural curing for 60 days.
Testing the chloride ion diffusion coefficient of the sample by referring to NT BUILD 492 chloride ion diffusion experiment-northern Europe experiment method;
the test conditions of the retention rate of the concrete compressive strength are as follows: the test sample is placed into a sodium sulfate solution with the mass fraction of 10% for soaking for 7 days at room temperature, the surface moisture is removed, the test sample is dried for 8 days at room temperature and is used as a cycle, after the test sample is subjected to 200 sulfate erosion cycles, the compressive strength retention rate of concrete is tested, the test loading process is divided into 2 stages, the loading rate is 0.2mm/min before the loading value reaches 60% -70% of the estimated peak value, and the loading rate is 0.03mm/min after the loading value exceeds 70% of the estimated peak value until the stress tends to be stable or the test sample is completely destroyed.
The results are shown in the following table:
test items Diffusion coefficient of chloride ion/10-13m2/s Strength retention%
Example 1 7.2 70.2
Example 2 6.0 71.2
Example 3 6.1 68.5
Example 4 7.4 63.1
Comparative example 1 8.2 61.2
Comparative example 2 7.8 66.7
As can be seen from the table above, the modified nano protective agent of the invention can reduce the chloride ion diffusion coefficient of the concrete sample, and improve the strength retention rate of the concrete sample. According to the invention, the modified nano protective agent is sprayed on the concrete template before pouring, so that the modified nano protective agent is mixed and hybridized with the uncured basic cement, the concrete surface is modified and enhanced after solidification, and the corrosion-resistant concrete surface with good apparent quality can be obtained. The modified nano protective agent comprises a modified nano hybrid, wherein the modified nano hybrid comprises a stabilizing agent, a lubricating agent, an emulsifying agent and a rheological control agent, the emulsifying agent is used for uniformly mixing all substances in the modified nano hybrid, the stability of the modified nano protective agent is enhanced, the lubricating agent is beneficial to obtaining a concrete surface with good apparent quality, and the rheological control agent is used for controlling the surface construction of a concrete material. In addition, the modified nano protective agent also comprises a nano reinforcing agent, and the stabilizing agent is used for stably solidifying the nano reinforcing agent and the basic cement, so that the concrete surface has long-term functionality. The modified nano protective agent has good stability, is used as a protective material when concrete is poured, and has the advantages of good protective effect and small using amount.
While embodiments of the invention have been disclosed above, it is not intended to be limited to the uses set forth in the specification and examples. It can be applied to all kinds of fields suitable for the present invention. Additional modifications will readily occur to those skilled in the art. The invention is therefore not to be limited to the specific details described above without departing from the general concept defined by the appended claims and their equivalents.

Claims (10)

1. The modified nano protective agent is characterized by comprising a modified nano hybrid, wherein the modified nano hybrid comprises a stabilizing agent, a lubricating agent, an emulsifying agent and a rheological control agent;
wherein the mass ratio of the stabilizing agent to the lubricating agent to the emulsifying agent to the rheological control agent is (0-5): (20-60): (5-10): (1-3).
2. The modified nano protectant as claimed in claim 1, further comprising a nano enhancer, wherein the mass ratio of the modified nano hybrid to the nano enhancer is (28-78): (2-16);
the nano reinforcing agent is one of nano titanium oxide, nano aluminum oxide or nano iron oxide.
3. The modified nanoprotectant of claim 1 or 2, wherein the stabilizing agent is tetraethoxysilane.
4. The modified nanoprotectant of claim 3, wherein the lubricant is one of a vegetable oil or a mineral oil.
5. The modified nano protectant of claim 4, wherein the rheology controller is one of a polycarboxylate or sulfamate water reducer.
6. The modified nano protectant according to claim 5, wherein the emulsifier is a mixture of span 40, Tween 80 and alkylphenol ethoxylates;
the mass ratio of the span 40 to the tween 80 to the alkylphenol polyoxyethylene is 2:2: 1.
7. The modified nano protectant according to claim 5, wherein the emulsifier is a mixture of span 80, Tween 40 and sodium dodecyl benzene sulfonate;
the mass ratio of the span 80 to the tween 40 to the sodium dodecyl benzene sulfonate is 1:1: 1.
8. A preparation method of a modified nanometer protective agent is characterized by comprising the following steps:
mixing a stabilizing agent, a lubricant and an emulsifier to obtain an auxiliary solution, mixing the auxiliary solution and a rheological control agent to obtain a modified nano hybrid solution, adding hydrochloric acid into the modified nano hybrid solution, and stirring for 2-4 hours to obtain a modified nano hybrid with a pH value of 4-6;
and step two, mixing the saturated calcium hydroxide solution with the modified nano hybrid in the step one, and stirring for 2-4 hours to obtain the modified nano protective agent with the pH value of 7.
9. A preparation method of a modified nanometer protective agent is characterized by comprising the following steps:
mixing a stabilizing agent, a lubricant and an emulsifier to obtain an auxiliary solution, mixing the auxiliary solution and a rheological control agent to obtain a modified nano hybrid solution, adding hydrochloric acid into the modified nano hybrid solution, and stirring for 2-4 hours to obtain a modified nano hybrid with a pH value of 4-6;
step two, mixing the modified nano hybrid in the step one with a nano reinforcing agent to obtain a modified nano reinforcing solution, and stirring the modified nano reinforcing solution at the temperature of 40-70 ℃ for 0.5-1 h to obtain a modified nano reinforcing substance;
and step three, mixing the saturated calcium hydroxide solution with the modified nano reinforcer in the step two, and stirring for 2-4 hours to obtain the modified nano protective agent with the pH value of 7.
10. The use of the modified nano protective agent prepared according to claim 8 or claim 9, wherein the modified nano protective agent is uniformly sprayed on the inner peripheral wall of a concrete template before concrete pouring;
wherein the coating amount of the modified nano protective agent is 20-30 g/m2。
CN202111030508.2A 2021-09-03 2021-09-03 Modified nano protective agent and preparation method and application thereof Active CN113636782B (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103804021A (en) * 2013-12-24 2014-05-21 济南大学 Reaction in-situ type concrete protective agent with self-cleaning function
CN104478476A (en) * 2014-11-20 2015-04-01 济南大学 Modifier for cement concrete and method for improving performance of cement concrete
CN104628354A (en) * 2015-02-11 2015-05-20 浙江大学 Nano modified self-penetrating water-based repair material and preparation method thereof
CN109987966A (en) * 2019-04-24 2019-07-09 中国路桥工程有限责任公司 Curing compound
CN110791128A (en) * 2019-11-11 2020-02-14 浙江大学台州研究院 Preparation method of ocean engineering reinforced concrete structure surface protective agent
CN112592205A (en) * 2020-12-18 2021-04-02 杨华 Concrete freeze-thaw resisting composite protective agent and preparation method thereof

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103804021A (en) * 2013-12-24 2014-05-21 济南大学 Reaction in-situ type concrete protective agent with self-cleaning function
CN104478476A (en) * 2014-11-20 2015-04-01 济南大学 Modifier for cement concrete and method for improving performance of cement concrete
CN104628354A (en) * 2015-02-11 2015-05-20 浙江大学 Nano modified self-penetrating water-based repair material and preparation method thereof
CN109987966A (en) * 2019-04-24 2019-07-09 中国路桥工程有限责任公司 Curing compound
CN110791128A (en) * 2019-11-11 2020-02-14 浙江大学台州研究院 Preparation method of ocean engineering reinforced concrete structure surface protective agent
CN112592205A (en) * 2020-12-18 2021-04-02 杨华 Concrete freeze-thaw resisting composite protective agent and preparation method thereof

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