CN110862239B - Chloride ion triggered self-repairing aggregate and preparation method thereof - Google Patents
Chloride ion triggered self-repairing aggregate and preparation method thereof Download PDFInfo
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- CN110862239B CN110862239B CN201911337868.XA CN201911337868A CN110862239B CN 110862239 B CN110862239 B CN 110862239B CN 201911337868 A CN201911337868 A CN 201911337868A CN 110862239 B CN110862239 B CN 110862239B
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- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
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- C04B20/1055—Coating or impregnating with inorganic materials
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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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
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Abstract
The invention discloses a chloride ion triggered self-repairing aggregate and a preparation method thereof, wherein the method comprises the following steps: mixing the porous material with the repairing agent solution, and obtaining the porous material with the repairing agent solution absorbed in pores under the condition of vacuum pumping; adding wall materials, a trigger and an emulsifier into a solvent, and stirring to obtain an ion trigger membrane suspension; covering the ion triggering film suspension on the surface of the porous material with the repairing agent solution adsorbed in the pores, and heating and drying to obtain the chloride ion triggering type self-repairing aggregate. The preparation method takes the porous material as a carrier of the repairing agent solution and the ion triggering membrane, the repairing agent solution is absorbed through the pores of the porous material, and the ion triggering membrane is covered on the surface of the porous material. The preparation method is simple, expensive equipment is not needed, the porous material is cheap and easy to obtain, and the porous material is doped into concrete as aggregate without causing serious reduction of strength and introducing new defects into the concrete.
Description
Technical Field
The invention relates to the technical field of concrete, in particular to chloride ion triggered self-repairing aggregate and a preparation method thereof.
Background
Reinforced concrete is the most widely used material in civil engineering and construction, and its durability determines the service life of the project and the benefit of construction. Because harmful pores and micro cracks of the concrete provide short access for harmful substances to enter the interior of the material, the passivation film of the internal reinforcing steel bar is easily damaged in a corrosive environment, and the corrosion of the reinforcing steel bar is accelerated. In the coastal environment, saline-alkali area and road and bridge engineering using deicing salt in winter, the invasion and penetration of chloride ions are also the main cause of concrete reinforcement corrosion. Therefore, the method slows down the penetration of chloride ions in the concrete and blocks the diffusion path of the chloride ions to the surface of the steel bar, and is an effective measure for improving the durability of the reinforced concrete structure under the use conditions.
The traditional method is to directly mix the antirust agent into the concrete, but the antirust agent has influence on the early hydration of the concrete, and part of the antirust agent is consumed in the early hydration. Although the existing chloride ion trigger type microcapsule is added into concrete to solve the problem of concrete corrosion, the existing chloride ion trigger type microcapsule is easy to crack under the alkaline environment with pH 12, is not suitable for the strong alkaline environment with pH 13 in the concrete, is complex in manufacturing process, needs to introduce a series of specific equipment, and is seriously influenced by the strength of the matrix after being doped in a large amount, so that the mass application is limited to a certain extent.
Accordingly, the prior art is yet to be improved and developed.
Disclosure of Invention
The invention aims to solve the technical problems that the existing chloride ion trigger type microcapsule is easy to crack under a strong alkaline environment, the manufacturing process is complicated, a series of specific equipment needs to be introduced, and the strength of the existing chloride ion trigger type microcapsule is affected by adding a large amount of concrete.
The technical scheme adopted by the invention for solving the technical problem is as follows: a preparation method of chloride ion triggered self-repairing aggregate comprises the following specific steps:
mixing the porous material with the repairing agent solution, and obtaining the porous material with the repairing agent solution absorbed in pores under the condition of vacuum pumping;
adding wall materials, a trigger and an emulsifier into a solvent, and stirring to obtain an ion trigger membrane suspension;
covering the ion triggering film suspension on the surface of the porous material with the repairing agent solution adsorbed in the pores, and heating and drying to obtain the chloride ion triggering type self-repairing aggregate.
The preparation method of the chloride ion triggered self-repairing aggregate comprises the following steps of mixing the porous material with a repairing agent solution, and obtaining the porous material with the repairing agent solution adsorbed in pores under a vacuum condition:
and mixing the porous material with the repairing agent solution, vacuumizing for 30-45 min, and removing the repairing agent solution on the surface of the porous material to obtain the porous material with the repairing agent solution adsorbed in pores.
The preparation method of the chloride ion triggered self-repairing aggregate comprises the step of preparing a porous material, wherein the porous material is one of light aggregate, diatomite, nano iron oxide, biochar, zeolite, activated carbon, metakaolin and porous expanded microbeads.
The preparation method of the chloride ion triggered self-repairing aggregate comprises the following steps of preparing a repairing agent, wherein the repairing agent is one or more of sodium nitrite, sodium monofluorophosphate, organic carboxylic acid alkanolamine salt, potassium dichromate, triethanolamine, monoethanolamine, triethanolamine oleate, trisodium phosphate, sodium tripolyphosphate, sodium benzoate, ammonium benzoate, hexamethylenetetramine and benzotriazole.
The preparation method of the chloride ion triggered self-repairing aggregate comprises the following steps of adding a wall material, a trigger and an emulsifier into a solvent, and stirring to obtain an ion triggered membrane suspension:
adding a wall material into a solvent, and stirring to obtain a wall material solution;
adding a trigger into the wall material solution, and stirring to obtain a mixed solution of the trigger and the wall material;
and adding an emulsifier into the mixed solution of the trigger and the wall material, and stirring to obtain the ionic trigger membrane suspension.
The preparation method of the chloride ion triggered self-repairing aggregate comprises the following steps of preparing a wall material, wherein the wall material is one or more of polystyrene, polyvinyl alcohol, polylactic acid-glycolic acid copolymer, hydroxypropyl methyl cellulose, ethyl cellulose, polyethylene terephthalate and polymethyl methacrylate.
The preparation method of the chloride ion triggered self-repairing aggregate comprises the step of preparing a chloride ion triggered self-repairing aggregate, wherein the trigger is one or more of lead sulfate, cuprous chloride and lead stearate.
The preparation method of the chloride ion triggered self-repairing aggregate comprises the step of preparing a solvent, wherein the solvent is one or more of p-xylene, dichloromethane, methane chloride, absolute ethyl alcohol and toluene.
The preparation method of the chloride ion triggered self-repairing aggregate comprises the following steps of covering the surface of the porous material with the repairing agent solution adsorbed in the pores with the ion triggered membrane suspension, and obtaining the chloride ion triggered self-repairing aggregate under the condition of heating and drying:
covering the ion triggering film suspension on the surface of the porous material adsorbed with the repairing agent solution by a spraying method to obtain the porous material with the surface covered with the ion triggering film suspension;
and heating and drying the porous material with the surface covered with the ion triggering film suspension to obtain the chloride ion triggering type self-repairing aggregate.
A chloride ion triggered self-repairing aggregate is prepared by any one of the preparation methods of the chloride ion triggered self-repairing aggregate.
Has the advantages that: the preparation method of the invention takes the porous material as a carrier of the repairing agent solution and the ion triggering membrane, the repairing agent solution is absorbed through the pores of the porous material, the ion triggering membrane suspension is covered on the surface of the porous material, and the chloride ion triggering type self-repairing aggregate is obtained by heating and drying the ion triggering membrane to solidify the ion triggering membrane. The preparation method is simple, expensive equipment is not needed, the porous material is cheap and easy to obtain, and the porous material is doped into concrete as aggregate without causing serious reduction of strength and introducing new defects into the concrete.
Drawings
FIG. 1 is an electron microscope image of an ion-triggered film on the surface of a chloride ion-triggered self-repairing aggregate prepared in example 1;
FIG. 2 is an electron microscope image of the ion-triggered membrane on the surface after soaking the chloride ion-triggered self-repairing aggregate prepared in example 1 in a 5% sodium chloride solution for 1 day.
Detailed Description
The invention provides a chloride ion triggered self-repairing aggregate and a preparation method thereof, and the invention is further described in detail below in order to make the purpose, technical scheme and advantages of the invention clearer. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Specifically, the preparation method of the chloride ion triggered self-repairing aggregate provided by the invention comprises the following steps:
and S1, mixing the porous material with the repairing agent solution, and obtaining the porous material with the repairing agent solution absorbed in the pores under the vacuum condition.
Because the existing chlorine ion triggering type microcapsule is easy to crack under a strong alkaline environment and the manufacturing process is complicated, a series of special equipment needs to be introduced, and the strength of the microcapsule can be influenced when a large amount of the microcapsule is mixed into concrete. In order to solve the above problem, in this embodiment, the porous material is mixed with the repairing agent solution by using the pore characteristics of the porous material, and the pores on the surface of the porous material absorb the repairing agent solution under the vacuum condition and finally reach a saturated state. And then removing the repairing agent solution on the surface of the porous material adsorbed with the repairing agent solution to obtain the porous material adsorbed with the repairing agent solution in pores, so that the surface of the porous material is covered with the ion triggering membrane solution in the subsequent step. In the embodiment, the porous material is used as a carrier of the repairing agent solution, so that the problem that the strength of the existing chloride ion triggering type microcapsule is influenced when the existing chloride ion triggering type microcapsule is added into concrete is solved.
In a specific embodiment, the step S1 specifically includes the steps of:
and S11, mixing the porous material with the repairing agent solution, vacuumizing for 30-45 min, and removing the repairing agent solution on the surface of the porous material to obtain the porous material with the repairing agent solution adsorbed in pores.
In one embodiment, the remediation solution may be placed in a vacuum dish, and the porous material may then be added to the vacuum dish to provide a porous material solution. Because the surface of the porous material contains pores, the repairing agent solution can slowly enter the pores of the porous material after the porous material is mixed with the repairing agent solution. In order to accelerate the adsorption of the pores on the porous material to the repairing agent solution, in this embodiment, the porous material solution is vacuumized until the porous material adsorbs the repairing agent solution to reach a saturated state. In order to avoid affecting the covering of the ion-triggered membrane on the surface of the porous material in the subsequent steps, the porous material adsorbed with the repairing agent solution is further treated in this embodiment to remove the excess repairing agent solution on the surface. In one embodiment, the vacuum pumping time is 30-45 min.
In specific implementation, the repair agent solution on the surface of the porous material and the repair agent solution in pores can be removed by directly heating and drying, so that the repair capability of the finally prepared chloride ion triggered self-repairing aggregate to concrete is weakened. Therefore, in this embodiment, a porous material having an adsorbing effect, such as a wet towel, is selected to wrap the porous material having the repairing agent solution adsorbed thereon to remove the excess repairing agent solution on the surface thereof.
In a specific embodiment, the porous material is one of lightweight aggregate, diatomite, nano iron oxide, biochar, zeolite, activated carbon, metakaolin and porous expanded beads. The repairing agent is one or more of sodium nitrite, sodium monofluorophosphate, organic carboxylic acid alkanolamine salt, potassium dichromate, triethanolamine, monoethanolamine, triethanolamine oleate, trisodium phosphate, sodium tripolyphosphate, sodium benzoate, hexamethylenetetramine and benzotriazole.
Specifically, the preparation method of the chloride ion triggered self-repairing aggregate provided by the invention further comprises the following steps:
and S2, adding the wall material, the trigger and the emulsifier into the solvent, and stirring to obtain the ion trigger membrane suspension.
In specific implementation, after the porous material with the repairing agent solution adsorbed in the pores is obtained, the surface of the porous material needs to be further covered with a layer of ion triggering membrane, so that the self-repairing solution in the porous material can be triggered to flow out to repair the concrete after chloride ions permeate into the concrete. The ionic triggering membrane comprises a wall material and a triggering agent, specifically, the wall material and the triggering agent are added into a volatile solvent for uniform dispersion, and an emulsifier is added into a mixed solution to enable the wall material and the triggering agent to form a suspension in the volatile solvent, so that the ionic triggering membrane suspension is covered on the surface of a porous material in the subsequent step.
In a specific embodiment, the step S2 specifically includes the steps of:
s21, adding the wall material into the solvent, and stirring to obtain a wall material solution;
s22, adding a trigger into the wall material solution, and stirring to obtain a mixed solution of the trigger and the wall material;
and S23, adding the emulsifier into the mixed solution of the trigger and the wall material, and stirring to obtain the ionic trigger membrane suspension.
In one embodiment, the solvent with volatility is firstly extracted by a pipette and placed in a reagent bottle, the wall material particles are added into the reagent bottle, and the reagent bottle is placed in a magnetic stirrer and stirred until the wall material particles are completely dissolved, so as to obtain a wall material solution. And then adding the trigger powder into the wall material solution, and stirring until the trigger powder is uniformly dispersed to obtain a mixed solution of the trigger and the wall material. And finally, adding an emulsifier into the mixed solution of the trigger and the wall material, and stirring to obtain the ionic trigger membrane suspension.
In a specific embodiment, the wall material is one or more of polystyrene, polyvinyl alcohol, polylactic acid-glycolic acid copolymer, hydroxypropyl methyl cellulose, ethyl cellulose, polyethylene terephthalate and polymethyl methacrylate. The trigger is one or more of lead sulfate, cuprous chloride and lead stearate. The solvent is volatile solvent, and comprises one or more of p-xylene, dichloromethane, methane chloride, absolute ethyl alcohol and toluene. In a specific embodiment, the mass ratio of the volatile solvent, the wall material particles and the trigger is 50: 10: 1.
specifically, the preparation method of the chloride ion triggered self-repairing aggregate provided by the invention further comprises the following steps:
s3, covering the ion triggering film suspension on the surface of the porous material with the repairing agent solution adsorbed in the pores, and heating and drying to obtain the chloride ion triggering type self-repairing aggregate.
In a specific embodiment, after the ion trigger membrane suspension and the porous material with the repairing agent solution adsorbed in the pores are obtained, the ion trigger membrane suspension is further covered on the surface of the porous material with the repairing agent solution adsorbed in the pores, then the porous material with the ion trigger membrane suspension covered on the surface is heated and dried to volatilize the solvent in the ion trigger membrane solution covered on the surface, and the ion trigger membrane is cured to obtain the chloride ion trigger type self-repairing aggregate. In one embodiment, the thickness of the ion trigger film is less than 100 um. In the specific application process, after the prepared chloride ion triggered self-repairing aggregate is doped into concrete, when chloride ions permeate into the concrete, the chloride ions and a trigger on the surface of the chloride ion triggered self-repairing aggregate are subjected to a complex reaction to form a complex compound to generate precipitation, so that the ion triggered membrane is broken, and then a repairing agent solution in pores of the porous material flows out to repair the concrete. The preparation method of the chloride ion triggered self-repairing aggregate is simple, a series of expensive devices are avoided, the carrier material is cheap and easy to obtain, and the porous material doped into concrete as the aggregate cannot cause serious reduction of the strength of the concrete and cannot introduce new defects into the concrete.
In a specific embodiment, the step S3 specifically includes the steps of:
s31, covering the ion triggering film suspension on the surface of the porous material adsorbed with the repairing agent solution by a spraying method to obtain the porous material of which the surface is covered with the ion triggering film suspension;
and S32, heating and drying the porous material with the surface covered with the ion triggering film suspension to obtain the chloride ion triggering type self-repairing aggregate.
In particular, the method for coating the ion trigger membrane suspension on the surface of the porous material adsorbed with the repairing agent solution comprises a spraying method and a soaking method, but the spraying method is more uniform in thickness compared with the soaking method for forming the ion trigger membrane. In one embodiment, the ion-triggered membrane suspension may be loaded into a sprayer, the ion-triggered membrane suspension may be applied by spraying onto the surface of the porous material having the repairing agent solution adsorbed thereon, and the porous material may be rotated while spraying, so that the surface thereof is completely covered with the ion-triggered membrane solution. And then, putting the porous material with the surface covered with the ion trigger membrane solution into a heating dryer to carry out heating and drying treatment on the porous material, accelerating the volatilization of the solvent in the ion trigger membrane solution, and curing the ion trigger membrane on the surface of the porous material to form a membrane, thereby obtaining the chloride ion trigger type self-repairing aggregate. In a specific embodiment, the temperature of the heating and drying treatment is 40-60 ℃, and the time of the heating and drying treatment is 5-10 min.
The invention also provides a chloride ion triggered self-repairing aggregate, which is prepared by the preparation method.
The preparation method of the invention takes the porous material as a carrier of the repairing agent solution and the ion triggering membrane, the repairing agent solution is absorbed through the pores of the porous material, the ion triggering membrane suspension is covered on the surface of the porous material, and the chloride ion triggering type self-repairing aggregate is obtained by heating and drying the ion triggering membrane to solidify the ion triggering membrane. The preparation method is simple, avoids the introduction of a series of expensive equipment, the porous material is cheap and easy to obtain, and the porous material doped into concrete as aggregate can not cause serious reduction of strength and can not introduce new defects into the concrete.
Example 1
(1) 10g of lightweight aggregate is placed in a vacuum dish containing 20% of sodium nitrite solution by mass concentration, and the vacuum dish is vacuumized for 45min to ensure that the lightweight aggregate fully adsorbs the sodium nitrite solution to reach a saturated state. Wrapping the lightweight aggregate adsorbed with the sodium nitrite solution by using a wet towel to prepare a sodium nitrite solution removed from the surface of the lightweight aggregate, so as to obtain the lightweight aggregate adsorbed with the sodium nitrite solution in pores;
(2) 20ml of the p-xylene solvent was taken out into a vial by a pipette, and 3.0g of polystyrene and 0.3g of lead sulfate powder were weighed, respectively. Adding 3.0g of polystyrene into a p-xylene solution, and placing a medicament bottle into a magnetic stirrer to stir until the polystyrene is completely dissolved to obtain a polystyrene solution. And adding the lead sulfate powder into the polystyrene solution, and continuously stirring until the lead sulfate powder is uniformly dispersed to obtain a mixed solution of polystyrene and lead sulfate. Finally, adding an emulsifier into the mixed solution of polystyrene and lead sulfate, and stirring for 10min to form a suspension to obtain an ion trigger membrane suspension;
(3) and quickly loading the ion trigger membrane suspension into a sprayer, and spraying the ion trigger membrane suspension onto the surface of the lightweight aggregate while rotating. And (3) putting the lightweight aggregate with the ion trigger membrane suspension sprayed on the surface into a heating air dryer at the temperature of 50 ℃ for 5min, accelerating the volatilization of the solvent in the ion trigger membrane suspension, and curing the ion trigger membrane to obtain the chloride ion trigger type self-repairing aggregate.
And (3) testing results: the prepared chloride ion triggered self-repairing aggregate sample is placed under an electron microscope, and an electron microscope image of the ion triggered film on the surface of the sample is shown in fig. 1. And then soaking the prepared chloride ion triggered self-repairing aggregate in a 5% sodium chloride solution for 1 day. And (3) drying the film the next day, and observing the dried film in an electron microscope to obtain an electron microscope image of the soaked ion triggering film as shown in figure 2, wherein the electron microscope image of the ion triggering film is shown in figure 2, and the ion triggering film cracks at the original surface pore position, so that the reaction of lead sulfate and chloride ions is proved, and the chloride ion triggering effect is realized.
In summary, the invention discloses a chloride ion triggered self-repairing aggregate and a preparation method thereof, and the method comprises the following steps: mixing the porous material with the repairing agent solution, and obtaining the porous material with the repairing agent solution absorbed in pores under the condition of vacuum pumping; adding wall materials, a trigger and an emulsifier into a solvent, and stirring to obtain an ion trigger membrane suspension; covering the ion triggering film suspension on the surface of the porous material with the repairing agent solution adsorbed in the pores, and heating and drying to obtain the chloride ion triggering type self-repairing aggregate. The preparation method of the invention takes the porous material as a carrier of the repairing agent solution and the ion triggering membrane, the repairing agent solution is absorbed through the pores of the porous material, the ion triggering membrane suspension is covered on the surface of the porous material with the repairing agent solution absorbed in the pores, and the chloride ion triggering type self-repairing aggregate is obtained by heating and drying the ion triggering membrane to solidify the ion triggering membrane. The preparation method is simple, expensive equipment is not needed, the porous material is cheap and easy to obtain, and the porous material is doped into concrete as aggregate without causing serious reduction of strength and introducing new defects into the concrete.
It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.
Claims (7)
1. A preparation method of chloride ion triggered self-repairing aggregate is characterized by comprising the following steps:
mixing the porous material with the repairing agent solution, and obtaining the porous material with the repairing agent solution absorbed in pores under the condition of vacuum pumping; the repairing agent is one or more of sodium nitrite, sodium monofluorophosphate, organic carboxylic acid alkanolamine salt, potassium dichromate, triethanolamine, monoethanolamine, triethanolamine oleate, trisodium phosphate, sodium tripolyphosphate, sodium benzoate, ammonium benzoate, hexamethylenetetramine and benzotriazole; adding wall materials, a trigger and an emulsifier into a solvent, and stirring to obtain an ion trigger membrane suspension; the wall material is one or more of polystyrene, polyvinyl alcohol, polylactic acid-glycolic acid copolymer, hydroxypropyl methyl cellulose, ethyl cellulose, polyethylene terephthalate and polymethyl methacrylate; the trigger is one or more of lead sulfate, cuprous chloride and lead stearate; the method comprises the following steps of adding wall materials, a trigger and an emulsifier into a solvent, and obtaining the ion trigger membrane suspension under the stirring condition: adding a wall material into a solvent, and stirring to obtain a wall material solution; adding a trigger into the wall material solution, and stirring to obtain a mixed solution of the trigger and the wall material; adding an emulsifier into the mixed solution of the trigger and the wall material, and stirring to obtain an ion trigger membrane suspension; wherein the mass ratio of the solvent to the wall material to the trigger is 50: 10: 1; the ion triggering film suspension liquid covers the surface of the porous material with the repairing agent solution absorbed in pores, and chloride ion triggering type self-repairing aggregate is obtained under the condition of heating and drying; the thickness of the ion trigger film on the surface of the porous material adsorbed with the repairing agent solution is less than 100 um.
2. The preparation method of the chloride ion triggered self-repairing aggregate according to claim 1, wherein the step of mixing the porous material with the repairing agent solution to obtain the porous material with the repairing agent solution adsorbed in pores under a vacuum condition specifically comprises the following steps:
and mixing the porous material with the repairing agent solution, vacuumizing for 30-45 min, and removing the repairing agent solution on the surface of the porous material to obtain the porous material with the repairing agent solution adsorbed in pores.
3. The preparation method of the chloride ion triggered self-repairing aggregate according to claim 2, wherein the porous material is a lightweight aggregate.
4. The preparation method of the chloride ion triggered self-repairing aggregate according to claim 2, wherein the porous material is one of biochar, zeolite, activated carbon and porous expanded beads.
5. The method for preparing the chloride ion triggered self-repairing aggregate according to claim 1, wherein the solvent is one or more of p-xylene, dichloromethane, methyl chloride, absolute ethyl alcohol and toluene.
6. The preparation method of the chloride ion triggered self-repairing aggregate according to claim 1, wherein the ion triggered membrane suspension covers the surface of the porous material with the repairing agent solution adsorbed in pores, and the step of obtaining the chloride ion triggered self-repairing aggregate under the condition of heating and drying specifically comprises the following steps:
covering the ion triggering film suspension on the surface of the porous material adsorbed with the repairing agent solution by a spraying method to obtain the porous material with the surface covered with the ion triggering film suspension;
and heating and drying the porous material with the surface covered with the ion triggering film suspension to obtain the chloride ion triggering type self-repairing aggregate.
7. The chloride ion triggered self-repairing aggregate is characterized by being prepared by the preparation method of the chloride ion triggered self-repairing aggregate according to any one of claims 1-6.
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| CN105366980B (en) * | 2015-11-04 | 2017-10-31 | 深圳大学 | A kind of method that spray drying prepares polymer wrapped resistance rust thing microcapsules |
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| CN103833256A (en) * | 2014-03-04 | 2014-06-04 | 深圳大学 | Chlorine ion triggered microcapsule and preparation method thereof |
| CN106423001A (en) * | 2016-11-18 | 2017-02-22 | 陕西盛迈石油有限公司 | Method for preparing chloride ion triggering type microcapsule through solvent evaporation method |
| WO2019076449A1 (en) * | 2017-10-18 | 2019-04-25 | Cemex Reseach Group Ag | Method to design a self-healing concrete additionated with a permeable concrete containing biological materials |
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