CN115259763B - Self-repairing waterproof concrete and preparation method thereof - Google Patents

Self-repairing waterproof concrete and preparation method thereof Download PDF

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Publication number
CN115259763B
CN115259763B CN202210970779.4A CN202210970779A CN115259763B CN 115259763 B CN115259763 B CN 115259763B CN 202210970779 A CN202210970779 A CN 202210970779A CN 115259763 B CN115259763 B CN 115259763B
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parts
urea
self
modified polysiloxane
microcapsule
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CN115259763A (en
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赵长才
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SUZHOU GUSU NEW BUILDING MATERIAL CO Ltd
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SUZHOU GUSU NEW BUILDING MATERIAL CO Ltd
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • 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
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/02—Agglomerated materials, e.g. artificial aggregates
    • C04B18/021—Agglomerated materials, e.g. artificial aggregates agglomerated by a mineral binder, e.g. cement
    • 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
    • C04B20/10—Coating or impregnating
    • C04B20/1051—Organo-metallic compounds; Organo-silicon compounds, e.g. bentone
    • 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
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20—Resistance against chemical, physical or biological attack
    • C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
    • 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 application discloses self-repairing waterproof concrete and a preparation method thereof. The self-repairing waterproof concrete comprises the following raw materials in parts by weight: 30-45 parts of cement, 90-115 parts of sand stone, 54-65 parts of water and 5-13 parts of microcapsule, wherein the microcapsule wall comprises the following preparation raw materials in parts by weight: 0.8-1.2 parts of modified polysiloxane and 13-32 parts of urea-formaldehyde resin, wherein the modified polysiloxane has strong molecular chain flexibility and can improve the flexibility of the urea-formaldehyde resin; the phenol in the modified polysiloxane leads the urea-formaldehyde resin to introduce ether bonds with larger flexibility, so that the flexibility of the urea-formaldehyde resin molecular chain is enhanced; the benzene ring in the modified polysiloxane can change the skeleton structure of urea-formaldehyde resin, so that the crosslinking density of the urea-formaldehyde resin is improved, the microcapsule is not easy to crack in the process of stirring concrete, the microcapsule is easy to crack under alkaline conditions, the active component reacts with cement hydration substances, the crack is repaired, and the anti-seepage and waterproof performance of the concrete is improved.

Description

Self-repairing waterproof concrete and preparation method thereof
Technical Field
The application relates to the field of concrete crack repair, in particular to self-repairing waterproof concrete and a preparation method thereof.
Background
Concrete is one of the most widely used building materials in the current generation, and its application fields cover civil engineering, water conservancy and harbor engineering, etc. Because concrete itself has the advantages of high compressive strength, good durability, low cost and the like, the concrete has become an indispensable building material. However, the concrete has larger brittleness, is easy to generate cracks due to temperature change, shrinkage, uneven subsidence, external load and the like, is influenced by the structure and the external environment, the number, the width, the depth and the like of the cracks are continuously increased, water in the air and other harmful substances can enter the concrete to cause erosion effect, and the mechanical property of the concrete material is reduced, so that the applicability, the durability and the impermeability of the concrete structure are reduced, the safety of the structure can be influenced, the service life of the structure is easy to influence, and even the safety of people is threatened, and the immeasurable loss is brought.
At present, the repairing mode of the concrete material mainly comprises two modes of manual repairing and automatic repairing, and the traditional manual repairing method has a good repairing effect, but the method can only repair cracks visible to naked eyes, is difficult to detect and repair the damage in the concrete in time and has a certain limitation.
In order to make up the limitation of the manual repair technology, a concrete microcapsule self-healing method is also researched on the basis, for example, a microcapsule technology is adopted, active components are firstly put into microcapsules, and the active components are uniformly stirred in concrete. Under the alkaline action, the microcapsule is gradually broken, and the released active components are enriched at the crack of the concrete to block the crack, thereby achieving the repairing effect.
The existing microcapsule made of urea-formaldehyde resin by the self-healing method of concrete has the defects of good insulating property, excellent wear resistance and low price, but the urea-formaldehyde resin has the disadvantages of poor viscosity, large shrinkage, large brittleness, water resistance and easy aging, and the microcapsule made of the urea-formaldehyde resin is easy to break in the process of stirring with concrete, so that the internal repairing agent flows out in advance, and the effect of self-repairing cracks cannot be achieved.
Disclosure of Invention
The self-repairing waterproof concrete and the preparation method thereof aim to solve the problem that microcapsules manufactured by urea formaldehyde resin are easy to crack in the process of stirring with concrete.
The self-repairing waterproof concrete and the preparation method thereof adopt the following technical scheme:
the self-repairing waterproof concrete comprises the following raw materials in parts by weight: 30-45 parts of cement, 90-115 parts of sand stone, 54-65 parts of water and 5-13 parts of microcapsule, wherein the microcapsule wall comprises the following preparation raw materials in parts by weight: 0.8-1.2 parts of modified polysiloxane and 13-32 parts of urea-formaldehyde resin.
Optionally, the weight ratio of the modified polysiloxane to the urea resin is 1:25-1:15.
Optionally, the weight ratio of the modified polysiloxane to the urea resin is 1:20-1:18.
Optionally, the modified polysiloxane has a structure as shown in formula (1):
the R is 1 Selected from C1-C6 alkyl or substituted alkyl, said R 2 Selected from phenol substituted C3-C9 alkyl groups, said R 3 Selected from C1-C6 alkyl or substituted alkyl, 15 < a.ltoreq.20, 50.ltoreq.b.ltoreq. 500,0.ltoreq.a.ltoreq.200.
Optionally, the R 2 One or more selected from 2-n-propylphenol, 4-butylphenol, 4-pentylphenol, 4-heptylphenol, 4-octylphenol and p-nonylphenol, wherein a is more than 15 and less than or equal to 20.
Optionally, the active components wrapped by the capsule wall of the microcapsule comprise the following raw materials in parts by weight: 15-25 parts of ethylenediamine tetraacetic acid, 15-25 parts of sodium silicate, 15-25 parts of lime powder, 10-20 parts of silica fume and 7-14 parts of an expanding agent.
Optionally, the active component is encapsulated in a capsule wall in the form of spherical particles, and the diameter of the spherical particles is 1-1000 μm.
According to the raw material proportion of the self-repairing waterproof concrete, the raw materials of the active components are mixed to obtain a first mixture, and the first mixture is granulated to form spherical particles; and mixing the raw materials of the capsule wall to obtain a second mixture, and spraying the second mixture on the surfaces of the spherical particles to obtain the microcapsule.
According to the raw material proportion of the self-repairing waterproof concrete, cement, sand, microcapsules and water are mixed until the cement, the sand, the microcapsules and the water are uniformly dispersed, and the self-repairing waterproof concrete is obtained.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the phenol in the modified polysiloxane leads the urea-formaldehyde resin into ether bond with larger flexibility through condensation of phenolic hydroxyl groups, so that the flexibility of the urea-formaldehyde resin molecular chain is enhanced, the brittleness of the resin is improved, the capsule wall is not easy to crack, and the microcapsule is not easy to crack in the process of stirring concrete; the benzene ring is introduced into the urea-formaldehyde resin, the skeleton structure of the urea-formaldehyde resin is changed, the crosslinking density of the urea-formaldehyde resin is improved, the wall of the urea-formaldehyde resin is not easy to separate from the active component, and the microcapsule is not easy to break in the process of stirring the concrete.
2. The modified polysiloxane can be embedded into a molecular chain of the urea-formaldehyde resin to form a net structure with the urea-formaldehyde resin, so that the cross-linking density of the urea-formaldehyde resin is improved, the stability of the urea-formaldehyde resin is enhanced, the molecular chain of the modified polysiloxane has stronger flexibility, the flexibility of the urea-formaldehyde resin can be improved, the brittleness of the capsule wall is improved, and the microcapsule is not easy to break in the process of stirring concrete.
3. The concrete is alkaline, under the alkaline condition, urea-formaldehyde resin is easy to decompose into urea compounds and aldehyde substances, such as urea and the like, and the urea can promote the hydration process of cement and plays a continuous long-term active role; the microcapsule is gradually broken under alkaline condition, the active component reacts with the cement hydration substances to block the capillary holes and fine cracks of the concrete, so as to play a role in compacting the concrete and improve the anti-seepage and waterproof performances of the concrete.
Detailed Description
Example 1:
a microcapsule comprising a wall and an active ingredient encapsulated by the wall. The active components wrapped by the capsule wall comprise the following raw materials in parts by weight: 20 parts of ethylenediamine tetraacetic acid, 20 parts of sodium silicate, 20 parts of lime powder, 15 parts of silica fume and 8 parts of an expanding agent; the capsule wall comprises the following raw materials in parts by weight: 0.9 part of modified polysiloxane and 13.5 parts of urea-formaldehyde resin. The weight ratio of the modified polysiloxane to the urea resin is 1:15.
In this example, the modified polysiloxane has the structure shown in formula (1):
R 1 selected from methyl, R 2 Selected from 4-butylphenol, R 3 Selected from propyl, a=18.52, b=300.16, c= 151.78.
A preparation method of the microcapsule comprises the following steps:
step one: putting 20 parts of ethylenediamine tetraacetic acid, 20 parts of sodium silicate, 20 parts of lime powder, 15 parts of silica fume and 8 parts of an expanding agent into a reaction kettle, and uniformly stirring to obtain a first mixture;
step two: placing the first mixture into a small-sized micron-sized granulator to obtain spherical particles;
step two: 0.9 part of modified polysiloxane and 13.5 parts of urea-formaldehyde resin are put into a reaction kettle and uniformly stirred to obtain a second mixture;
step four: and uniformly and repeatedly spraying the second mixture on the surfaces of the spherical particles, and forming capsule walls on the surfaces of the spherical particles by the second mixture to obtain the microcapsules.
The self-repairing waterproof concrete comprises the following raw materials in parts by weight: 40 parts of cement, 95 parts of sand stone and 60 parts of water
And 8 parts of microcapsules.
The preparation method of the self-repairing waterproof concrete comprises the following steps: 40 parts of cement, 95 parts of sand stone, 8 parts of microcapsule and 60 parts of water are respectively added and stirred until the cement, the sand stone and the microcapsule are uniformly dispersed, and the self-repairing waterproof concrete is obtained.
Example 2:
the present example differs from example 1 in that the capsule wall comprises the following raw materials in parts by weight: 0.9 part of modified polysiloxane and 15.3 parts of urea-formaldehyde resin. The weight ratio of the modified polysiloxane to the urea resin is 1:17.
The remainder was the same as in example 1.
Example 3:
the present example differs from example 1 in that the capsule wall comprises the following raw materials in parts by weight: 0.9 part of modified polysiloxane and 16.2 parts of urea-formaldehyde resin. The weight ratio of the modified polysiloxane to the urea resin is 1:18.
The remainder was the same as in example 1.
Example 4:
the present example differs from example 1 in that the capsule wall comprises the following raw materials in parts by weight: 0.9 part of modified polysiloxane and 17.1 parts of urea-formaldehyde resin. The weight ratio of the modified polysiloxane to the urea resin is 1:19.
The remainder was the same as in example 1.
Example 5:
the present example differs from example 1 in that the capsule wall comprises the following raw materials in parts by weight: 0.9 part of modified polysiloxane and 18 parts of urea-formaldehyde resin. The weight ratio of the modified polysiloxane to the urea resin is 1:20.
The remainder was the same as in example 1.
Example 6:
the present example differs from example 1 in that the capsule wall comprises the following raw materials in parts by weight: 0.9 part of modified polysiloxane and 18.9 parts of urea-formaldehyde resin. The weight ratio of the modified polysiloxane to the urea resin is 1:21.
The remainder was the same as in example 1.
Example 7:
the present example differs from example 1 in that the capsule wall comprises the following raw materials in parts by weight: 0.9 part of modified polysiloxane and 20.7 parts of urea-formaldehyde resin. The weight ratio of the modified polysiloxane to the urea resin is 1:23.
The remainder was the same as in example 1.
Example 8:
the present example differs from example 1 in that the capsule wall comprises the following raw materials in parts by weight: 0.9 part of modified polysiloxane and 22.5 parts of urea-formaldehyde resin. The weight ratio of the modified polysiloxane to the urea resin is 1:25.
The remainder was the same as in example 1.
Example 9:
this example differs from example 4 in that in the structure of the modified polysiloxane, R 1 Selected from methyl, R 2 Selected from 4-butylphenol, R 3 Selected from propyl, a=13.17, b=300.16, c= 151.78.
The remainder was the same as in example 4.
Example 10:
this example differs from example 4 in that in the structure of the modified polysiloxane, R 1 Selected from methyl, R 2 Selected from 4-butylphenol, R 3 Selected from propyl, a=13.73, b=300.16, c= 151.78.
The remainder was the same as in example 4.
Example 11:
this example differs from example 4 in that in the structure of the modified polysiloxane, R 1 Selected from methyl, R 2 Selected from 4-butylphenol, R 3 Selected from propyl, a=14.68, b=300.16, c= 151.78.
The remainder was the same as in example 4.
Example 12:
this example differs from example 4 in that in the structure of the modified polysiloxane, R 1 Selected from methyl, R 2 Selected from 4-butylphenol, R 3 Selected from propyl, a=20.15, b=300.16, c= 151.78.
The remainder was the same as in example 4.
Example 13:
this example differs from example 4 in that in the structure of the modified polysiloxane, R 1 Selected from methyl, R 2 Selected from 4-butylphenol, R 3 Selected from propyl, a=21.10, b=300.16, c= 151.78.
The remainder was the same as in example 4.
Example 14:
this example differs from example 4 in that in the structure of the modified polysiloxane, R 1 Selected from methyl, R 2 Selected from 4-butylphenol, R 3 Selected from propyl, a=21.89, b=300.16, c= 151.78.
The remainder was the same as in example 4.
Comparative example 1:
the comparative example differs from example 4 in that the capsule wall comprises the following raw materials in parts by weight: 0.9 part of polysiloxane and 17.1 parts of urea-formaldehyde resin. The polysiloxane has a structure shown in a formula (2):
R 1 selected from methyl, R 2 Selected from methyl, R 3 Selected from propyl, a=18.52, b=300.16, c= 151.78.
The remainder was the same as in example 4.
Comparative example 2:
the comparative example differs from example 4 in that the capsule wall comprises the following raw materials in parts by weight: 0.9 part of polysiloxane and 17.1 parts of urea-formaldehyde resin. The polysiloxane has a structure shown in a formula (3):
R 1 selected from methyl, R 2 Selected from allyl 3-acetate, R 3 Selected from propyl, a=18.52, b=300.16, c= 151.78.
The remainder was the same as in example 4.
Comparative example 3:
the comparative example differs from example 4 in that the capsule wall comprises the following raw materials in parts by weight: 18 parts of urea-formaldehyde resin.
The remainder was the same as in example 4.
The second mixtures of examples 1 to 13 and comparative examples 1 to 3 were dried completely according to GB/T1043-2008 to form a capsule wall 800 μm thick and the notched impact strength of the capsule wall was measured in kJ/m 2 The higher the value of the impact strength, the better the flexibility of the capsule wall.
The mechanical strength of the microcapsules was determined by tabletting the microcapsules of examples 1 to 13 and comparative examples 1 to 3 using a tabletting machine (pressure 5 KG), the microcapsules of examples 1 to 13 and comparative examples 1 to 3 were sampled and examined, the number of microcapsules sampled and examined was 100, the breakage of the microcapsules of each example or comparative example was observed by a scanning electron microscope, and the strength of the microcapsules was represented by the breakage rate = (number of microcapsules broken =.
Table 1: impact strength of capsule wall and breakage rate of microcapsule
According to examples 1-13 and comparative examples 1-3, it is known that the modified polysiloxane and polysiloxane have strong flexibility in molecular chains, the flexibility of urea-formaldehyde resin can be improved, the brittleness of the capsule wall can be improved, and the microcapsule is not easy to break in the process of stirring concrete.
According to examples 1-8, it is known that when the weight portion of the modified polysiloxane is gradually increased, the impact strength is improved, the breakage rate is reduced, the molecular chain flexibility of the modified polysiloxane is strong, the ether bond introduced by the urea-formaldehyde resin is increased, the flexibility of the urea-formaldehyde resin can be improved, the brittleness of the capsule wall is improved, and the microcapsule is not easy to break in the process of stirring the concrete; when the modified polysiloxane is added in too much weight part, the impact strength is reduced, the breakage rate is improved, the crosslinking density of the benzene ring and the urea-formaldehyde resin is increased, the flexibility of the molecular chain is reduced along with the increase of brittleness, and the microcapsule is easy to break in the process of stirring the concrete.
According to examples 9 to 14, when a is less than or equal to 15, the impact strength is reduced, the breakage rate is improved, the ether bond introduced by the urea-formaldehyde resin is reduced, the flexibility of the urea-formaldehyde resin is reduced, the brittleness of the capsule wall is increased, and the microcapsule is easy to break in the process of stirring the concrete; when a >20, the crosslinking density of the benzene ring and the urea resin is increased, the hardness is improved, the flexibility of the molecular chain is reduced along with the increase of brittleness, and the microcapsule is easy to break in the process of stirring the concrete.
The embodiments of this embodiment are all preferred embodiments of the present application, and are not intended to limit the scope of the present application, in which like reference numerals refer to like elements throughout. Therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (7)

1. The self-repairing waterproof concrete is characterized by comprising the following raw materials in parts by weight: 30-45 parts of cement, 90-115 parts of sand stone, 54-65 parts of water and 5-13 parts of microcapsule, wherein the microcapsule wall comprises the following preparation raw materials in parts by weight: 0.8-1.2 parts of modified polysiloxane and 13-32 parts of urea-formaldehyde resin;
the structure of the modified polysiloxane is shown as a formula (1):
the R is 1 Selected from C1-C6 alkyl, said R 2 Selected from phenol substituted C3-C9 alkyl groups, said R 3 Alkyl selected from C1-C6, a is more than 15 and less than or equal to 20, b is more than or equal to 50 and less than or equal to 500,0, and C is more than or equal to 200;
the active components wrapped by the capsule wall of the microcapsule comprise the following raw materials in parts by weight: 15-25 parts of ethylenediamine tetraacetic acid, 15-25 parts of sodium silicate, 15-25 parts of lime powder, 10-20 parts of silica fume and 7-14 parts of an expanding agent.
2. The self-repairing waterproof concrete according to claim 1, wherein the weight part ratio of the modified polysiloxane to the urea resin is 1:25-1:15.
3. The self-repairing waterproof concrete according to claim 1, wherein the weight part ratio of the modified polysiloxane to the urea resin is 1:20-1:18.
4. The self-repairing waterproof concrete according to claim 1, wherein R 2 One or more selected from 2-n-propylphenol, 4-butylphenol, 4-pentylphenol, 4-heptylphenol, 4-octylphenol and p-nonylphenol, wherein a is more than 15 and less than or equal to 20.
5. The self-repairing waterproof concrete according to claim 1, wherein the active component is coated in the capsule wall in the form of spherical particles, and the diameter of the spherical particles is 1-1000 μm.
6. A method for preparing self-repairing waterproof concrete, which is characterized in that according to the raw material proportion of the self-repairing waterproof concrete of claim 1, the raw materials of the active components are mixed to obtain a first mixture, and the first mixture is granulated to form spherical particles; and mixing the raw materials of the capsule wall to obtain a second mixture, and spraying the second mixture on the surfaces of the spherical particles to obtain the microcapsule.
7. A method for preparing self-repairing waterproof concrete, which is characterized in that cement, sand, microcapsules and water are mixed according to the raw material proportion of the self-repairing waterproof concrete according to any one of claims 1-5 until the cement, sand, microcapsules and water are uniformly dispersed, so as to obtain the self-repairing waterproof concrete.
CN202210970779.4A 2022-08-13 2022-08-13 Self-repairing waterproof concrete and preparation method thereof Active CN115259763B (en)

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Citations (4)

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Publication number Priority date Publication date Assignee Title
CN101289299A (en) * 2008-05-20 2008-10-22 深圳大学 Self-repair concrete using polyurea resin high molecule microcapsule and method of manufacture
CN101289298A (en) * 2008-05-20 2008-10-22 深圳大学 Self-repair concrete using urea-formaldehyde resin type high molecule microcapsule and method of manufacture
CN104944833A (en) * 2015-03-31 2015-09-30 深圳大学 Microcapsule for self-repair concrete and preparation method of self-repair concrete
CN108383411A (en) * 2018-02-02 2018-08-10 华南理工大学 A kind of microcapsules and preparation method thereof for cement base microcrack selfreparing

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101289299A (en) * 2008-05-20 2008-10-22 深圳大学 Self-repair concrete using polyurea resin high molecule microcapsule and method of manufacture
CN101289298A (en) * 2008-05-20 2008-10-22 深圳大学 Self-repair concrete using urea-formaldehyde resin type high molecule microcapsule and method of manufacture
US20110060074A1 (en) * 2008-05-20 2011-03-10 Feng Xing Self-Repairing Concrete Used Urea-Formaldehyde Resin Polymer Micro-Capsules and Method for Fabricating Same
CN104944833A (en) * 2015-03-31 2015-09-30 深圳大学 Microcapsule for self-repair concrete and preparation method of self-repair concrete
CN108383411A (en) * 2018-02-02 2018-08-10 华南理工大学 A kind of microcapsules and preparation method thereof for cement base microcrack selfreparing

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