CN115717045A - Concrete microcrack repairing material and preparation method thereof - Google Patents
Concrete microcrack repairing material and preparation method thereof Download PDFInfo
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- CN115717045A CN115717045A CN202211361921.1A CN202211361921A CN115717045A CN 115717045 A CN115717045 A CN 115717045A CN 202211361921 A CN202211361921 A CN 202211361921A CN 115717045 A CN115717045 A CN 115717045A
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- 239000000463 material Substances 0.000 title claims abstract description 49
- 239000004567 concrete Substances 0.000 title claims abstract description 39
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 239000003822 epoxy resin Substances 0.000 claims abstract description 82
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 82
- 239000007788 liquid Substances 0.000 claims abstract description 80
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 37
- 230000001580 bacterial effect Effects 0.000 claims abstract description 35
- 239000000839 emulsion Substances 0.000 claims abstract description 30
- 239000007787 solid Substances 0.000 claims abstract description 18
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000004202 carbamide Substances 0.000 claims abstract description 12
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000011575 calcium Substances 0.000 claims abstract description 7
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 7
- 239000011259 mixed solution Substances 0.000 claims abstract description 6
- 238000005303 weighing Methods 0.000 claims description 23
- 238000003756 stirring Methods 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- ZCCIPPOKBCJFDN-UHFFFAOYSA-N calcium nitrate Chemical compound [Ca+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ZCCIPPOKBCJFDN-UHFFFAOYSA-N 0.000 claims description 12
- 238000009630 liquid culture Methods 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- 239000000243 solution Substances 0.000 claims description 7
- 229960005069 calcium Drugs 0.000 claims description 6
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 claims description 5
- CBOCVOKPQGJKKJ-UHFFFAOYSA-L Calcium formate Chemical compound [Ca+2].[O-]C=O.[O-]C=O CBOCVOKPQGJKKJ-UHFFFAOYSA-L 0.000 claims description 4
- 241000193386 Lysinibacillus sphaericus Species 0.000 claims description 4
- VSGNNIFQASZAOI-UHFFFAOYSA-L calcium acetate Chemical compound [Ca+2].CC([O-])=O.CC([O-])=O VSGNNIFQASZAOI-UHFFFAOYSA-L 0.000 claims description 4
- 235000011092 calcium acetate Nutrition 0.000 claims description 4
- 239000001639 calcium acetate Substances 0.000 claims description 4
- 229960005147 calcium acetate Drugs 0.000 claims description 4
- 229940044172 calcium formate Drugs 0.000 claims description 4
- 235000019255 calcium formate Nutrition 0.000 claims description 4
- 239000004281 calcium formate Substances 0.000 claims description 4
- 239000012153 distilled water Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 235000015097 nutrients Nutrition 0.000 claims description 4
- MKJXYGKVIBWPFZ-UHFFFAOYSA-L calcium lactate Chemical compound [Ca+2].CC(O)C([O-])=O.CC(O)C([O-])=O MKJXYGKVIBWPFZ-UHFFFAOYSA-L 0.000 claims description 3
- 239000001527 calcium lactate Substances 0.000 claims description 3
- 229960002401 calcium lactate Drugs 0.000 claims description 3
- 235000011086 calcium lactate Nutrition 0.000 claims description 3
- 239000001963 growth medium Substances 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims description 2
- 230000001070 adhesive effect Effects 0.000 claims description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 abstract description 37
- 229910000019 calcium carbonate Inorganic materials 0.000 abstract description 19
- 244000005700 microbiome Species 0.000 abstract description 7
- 230000006698 induction Effects 0.000 abstract description 4
- 239000002245 particle Substances 0.000 abstract description 3
- 239000002131 composite material Substances 0.000 abstract description 2
- 230000035699 permeability Effects 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 23
- 230000008021 deposition Effects 0.000 description 6
- 239000003814 drug Substances 0.000 description 4
- 230000000813 microbial effect Effects 0.000 description 4
- 229940079593 drug Drugs 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 238000007405 data analysis Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910052713 technetium Inorganic materials 0.000 description 2
- GKLVYJBZJHMRIY-UHFFFAOYSA-N technetium atom Chemical compound [Tc] GKLVYJBZJHMRIY-UHFFFAOYSA-N 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 241000193830 Bacillus <bacterium> Species 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- MKJXYGKVIBWPFZ-CEOVSRFSSA-L calcium;(2s)-2-hydroxypropanoate Chemical compound [Ca+2].C[C@H](O)C([O-])=O.C[C@H](O)C([O-])=O MKJXYGKVIBWPFZ-CEOVSRFSSA-L 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- -1 compound calcium carbonate Chemical class 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000005137 deposition process Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention discloses a concrete crack repairing material and a preparation method thereof, wherein the concrete crack repairing material is prepared by mixing a component A and a component B, wherein the component A comprises the following components in parts by weight: the component A is a mixed solution of aqueous epoxy resin emulsion and bacterial liquid, and the component B is a mixed solution of an epoxy resin curing agent and mineralized liquid; the mineralized liquid is formed by mixing a calcium source and urea. The invention uses the technology of generating calcium carbonate by microorganism induction to be used with the waterborne epoxy resin material in a composite way, and the generated calcium carbonate can weaken the volume shrinkage generated after the waterborne epoxy resin is repaired to a certain extent. And the technical problems of viscosity increase and permeability reduction caused by adding a large amount of solid particles into the aqueous epoxy resin emulsion can be avoided.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to a concrete microcrack repairing material and a preparation method thereof.
Background
The concrete structure is gradually degraded in the interior or the surface thereof under the influence of external factors, and cracking is one of the common concrete degradation phenomena. Concrete cracks, if not repaired in time, will further degrade until the concrete member loses its load bearing capacity.
Compared with the conventional concrete crack repairing material and technology, patent CN 104196131B discloses a method for plugging cracks of a concrete cast-in-place slab floor or a bottom plate by using microbial deposited calcium carbonate, and proposes that a pressure pouring mode is adopted, and an aqueous solution required by a microbial repairing technology is poured into the concrete cracks for repairing. The microbial concrete crack repairing technology has the advantages of environmental protection, permeability, strong operability and the like. However, the technology of the microbial-induced calcium carbonate deposition is influenced by various factors, is a slow deposition process, and has the disadvantages of high bottom-sinking speed, loose calcium carbonate and low strength. Therefore, this technique has a technical problem that the repair cycle is long.
Disclosure of Invention
In view of the above, the present invention provides a concrete crack repairing material and a preparation method thereof, so as to solve the technical problem of long repairing period of the microorganism-induced calcium carbonate deposition technology proposed in the background art.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention discloses a concrete crack repairing material which is prepared by mixing a component A and a component B, wherein the component A comprises the following components in parts by weight:
the component A is a mixed solution of aqueous epoxy resin emulsion and bacterial liquid, and the component B is a mixed solution of an epoxy resin curing agent and mineralized liquid;
the mineralized liquid is formed by mixing a calcium source and urea.
As a further scheme of the invention: the component A comprises, by weight, 100 parts of a water-based epoxy resin emulsion and a bacterial liquid, wherein the weight part ratio of the water-based epoxy resin emulsion to the bacterial liquid is 70-90:30-10.
As a further scheme of the invention: the aqueous epoxy resin emulsion in the component A is one of EP-2340W, BH644, EP-5024 and DS-5100.
As a further scheme of the invention: the component A is prepared from bacillus sphaericus and a liquid culture solution in a volume ratio of 1:8 is configured; the liquid culture medium was prepared from 2g of sodium bicarbonate, 50g of nutrient broth and 1L of distilled water.
As a further scheme of the invention: the epoxy resin curing agent in the component B is one of EH-2100W, BH560, MG-50 and 900S.
As a further scheme of the invention: the mass ratio of the waterborne epoxy resin emulsion to the epoxy resin curing agent is 100: 133. 100, and (2) a step of: 100. 100:55 or 100:20.
as a further scheme of the invention: the calcium source is at least one of calcium nitrate, calcium formate, calcium lactate and calcium acetate.
As a further scheme of the invention: the mass ratio of the mineralized liquid to the bacterial liquid is (1-3): 1.
the invention also discloses a preparation method of the concrete microcrack repairing material, which comprises the following steps:
s1, mixing the following components in parts by weight of 70-90:30-10, weighing the aqueous epoxy resin emulsion and the bacterial liquid, and uniformly stirring at normal temperature to obtain a component A;
s2, mixing a calcium source and urea according to a molar concentration ratio of (1-1.2): 1, mixing to obtain mineralized liquid;
s3, weighing the epoxy resin curing agent and the mineralized liquid, and uniformly stirring at normal temperature to obtain a component B;
and S4, mixing the component A and the component B, calculating the total solid content of the waterborne epoxy resin and the epoxy resin curing agent in the mixture, and controlling the total solid content to be 40% in a manner of adding water and stirring uniformly to obtain the concrete microcrack repairing material.
In a further scheme, in the step S2, the mass ratio of the aqueous epoxy resin emulsion to the epoxy resin curing agent is 100: 133. 100: 100. 100, and (2) a step of: 55 or 100:20, the mass ratio of the mineralized liquid to the bacterial liquid is (1-3): 1.
compared with the prior art, the invention has the beneficial effects that:
1. the invention uses the water-based epoxy resin as the cementing agent, can cement loose calcium carbonate particles generated by quick induction of microorganisms, and greatly shortens the repairing period on the premise of ensuring the mechanical property of the repairing material.
2. The invention uses the technology of generating calcium carbonate by microorganism induction to be used with the waterborne epoxy resin material in a composite way, and the generated calcium carbonate can weaken the volume shrinkage generated after the waterborne epoxy resin is repaired to a certain extent.
3. The concrete microcrack repairing material disclosed by the invention is characterized in that before use, a bacterial liquid and a mineralized liquid are respectively placed in A, B components, and before use, A, B components are mixed and then poured into concrete cracks to react to generate calcium carbonate particles.
Detailed Description
In order that the invention may be more fully understood, reference will now be made to the following examples. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
The following examples and comparative examples employ the following raw material specific information:
the component A comprises:
waterborne epoxy resin emulsions, EP-2340W, available from Zhan New resins (China) Co., ltd;
aqueous epoxy resin emulsion, BH644, available from Guanguan Chemicals, inc., dongguan;
waterborne epoxy resin emulsions, EP-5024, available from Haoge insulation Co., ltd;
aqueous epoxy resin emulsion, DS-5100, available from Shanghai technetium Cheng New Material Co., ltd;
bacillus sphaericus LMG22257, belgium strain preservation center;
sodium bicarbonate, available from national pharmaceuticals group;
nutritional broth, HB0108, purchased from Qingdao Haibo Biotechnology ltd;
and B component:
epoxy curing agent EH-2100W, available from Zhan Xin resins (China) Co., ltd;
an epoxy resin curing agent BH560 available from Guanguan Chemicals, inc., of Dongguan;
epoxy resin curing agent MG-50 available from Haoge insulation materials, inc.;
epoxy resin curing agent 900S, available from Shanghai technetium Cheng New Material Ltd
Calcium nitrate, purchased from national drug group;
calcium formate, available from the national pharmaceutical group;
calcium lactate, purchased from national drug group;
calcium acetate, purchased from national drug group;
urea, purchased from the national pharmaceutical group.
The waterborne epoxy resin emulsion is matched with an epoxy resin curing agent for use, and the proportion of the waterborne epoxy resin emulsion to the epoxy resin curing agent is EP-2340W: EH-2100w =100, bh644: BH560=1:1,EP-5024: MG-50=5, 1, DS-5100:900s = 100.
The bacterium liquid in this application is self-control material, is by spherical bacillus and liquid culture according to 1:8 is configured according to the volume ratio; wherein the liquid culture medium is prepared from 2g sodium bicarbonate, 50g nutrient broth and 1L distilled water.
It is understood that the above raw material reagents are only examples of some specific embodiments of the present invention, so as to make the technical scheme of the present invention more clear, and do not represent that the present invention can only adopt the above reagents, particularly, the scope of the claims is subject to. In addition, "parts" described in examples and comparative examples mean parts by weight unless otherwise specified.
Any range recited herein is intended to include the endpoints and any number between the endpoints and any subrange subsumed therein or defined therein.
The preparation of the components in the following examples and comparative examples was carried out at normal temperature.
Example 1
Preparing a component A: weighing 70 parts of aqueous epoxy resin emulsion EP-2340W and 30 parts of bacterial liquid, and uniformly stirring to obtain a component A;
preparing a component B: according to EP-2340W: EH-2100W =100, and weighing an epoxy resin curing agent EH-2100W; preparing mineralized liquid according to the molar concentrations of 6M/L calcium nitrate and 5M/L urea, and mixing the mineralized liquid with the bacterial liquid according to the ratio of the amount of the mineralized liquid to the amount of the bacterial liquid 3:1, weighing the mineralized liquid, and finally uniformly stirring the epoxy resin curing agent and the mineralized liquid to obtain a component B;
and mixing the component A and the component B, calculating the total solid content of the waterborne epoxy resin and the epoxy resin curing agent in the mixture, and controlling the total solid content to be 40% by adding water and stirring uniformly to obtain the concrete microcrack repairing material.
Example 2
Preparing a component A: weighing 90 parts of aqueous epoxy resin emulsion BH644 and 10 parts of bacterial liquid, and uniformly stirring to obtain a component A;
preparing a component B: according to BH644: BH560=1:1, weighing an epoxy resin curing agent BH560; preparing mineralized liquid according to the molar concentrations of 5M/L calcium formate and 5M/L urea, and mixing the mineralized liquid with the bacterial liquid according to the ratio of the amount of the mineralized liquid to the amount of the bacterial liquid of 1:1, weighing the mineralized liquid, and uniformly stirring the epoxy resin curing agent and the mineralized liquid to obtain a component B;
and mixing the component A and the component B, calculating the total solid content of the waterborne epoxy resin and the epoxy resin curing agent in the mixture, and controlling the total solid content to be 40% by adding water and stirring uniformly to obtain the concrete microcrack repairing material.
Example 3
Preparing a component A: weighing 80 parts of aqueous epoxy resin emulsion EP-5024 and 20 parts of bacterial liquid, and uniformly stirring to obtain a component A;
preparing a component B: according to EP-5024: MG-50=5, weighing an epoxy resin curing agent MG-50; preparing mineralized liquid according to the molar concentrations of 5.5M/L calcium lactate and 5M/L urea, and mixing the mineralized liquid with the bacterial liquid according to the ratio of the amount of the mineralized liquid to the amount of the bacterial liquid of 2:1, weighing the mineralized liquid, and uniformly stirring the epoxy resin curing agent and the mineralized liquid to obtain a component B;
and mixing the component A and the component B, calculating the total solid content of the waterborne epoxy resin and the epoxy resin curing agent in the mixture, and controlling the total solid content to be 40% by adding water and stirring uniformly to obtain the concrete microcrack repairing material.
Example 4
Preparing a component A: weighing 80 parts of aqueous epoxy resin emulsion DS-5100 and 20 parts of bacterial liquid, and uniformly stirring to obtain a component A;
preparing a component B: according to DS-5100:900S =100, weighing 900S of an epoxy resin curing agent; preparing a mineralized liquid according to the molar concentrations of calcium acetate 6M/L and urea 5M/L, and mixing the mineralized liquid with the bacterial liquid according to the ratio of the amount of the mineralized liquid to the amount of the bacterial liquid 2:1, weighing the mineralized liquid, and uniformly stirring the epoxy resin curing agent and the mineralized liquid to obtain a component B;
and mixing the component A and the component B, calculating the total solid content of the waterborne epoxy resin and the epoxy resin curing agent in the mixture, and controlling the total solid content to be 40% by adding water and stirring uniformly to obtain the concrete microcrack repairing material.
Comparative example 1
Preparing a component A: weighing 100 parts of waterborne epoxy resin emulsion EP-2340W to obtain a component A;
preparing a component B: according to EP-2340W: EH-2100W =100, and weighing an epoxy resin curing agent EH-2100W to obtain a component B;
and mixing the component A and the component B, calculating the total solid content of the waterborne epoxy resin and the epoxy resin curing agent in the mixture, and controlling the total solid content to be 40% by adding water and stirring uniformly to obtain the concrete microcrack repairing material.
Comparative example 2
Preparing a component A: weighing 70 parts of waterborne epoxy resin emulsion EP-2340W and 30 parts of 30% solid content nano calcium carbonate dispersion liquid, and uniformly stirring to obtain a component A;
preparing a component B: according to EP-2340W: EH-2100W =100, and weighing an epoxy resin curing agent EH-2100W to obtain a component B;
and (3) mixing the component A and the component B, calculating the total solid content of the waterborne epoxy resin and the epoxy resin curing agent in the mixture, and controlling the total solid content to be 40% by adding water and stirring uniformly to obtain the concrete microcrack repairing material.
Comparative example 3
Preparing a component A: weighing 100 parts of bacterial liquid to obtain a component A;
preparing a component B: preparing mineralized liquid according to the molar concentrations of 6M/L calcium nitrate and 5M/L urea, and mixing the mineralized liquid with the bacterial liquid according to the ratio of the amount of the mineralized liquid to the amount of the bacterial liquid 2:1, and weighing the mineralized liquid to obtain a component B;
and mixing the component A and the component B to obtain the concrete microcrack repairing material.
Comparative example 4
Preparing a component A: preparing a liquid culture solution from 2g of sodium bicarbonate, 50g of nutrient broth and 1L of distilled water, preparing bacillus sphaericus and the liquid culture solution into a bacterial solution according to a volume ratio of 1;
preparing a component B: preparing mineralized liquid according to the molar concentrations of 0.6M/L calcium nitrate and 0.5M/L urea, and mixing the mineralized liquid with the bacterial liquid according to the ratio of the amount of the mineralized liquid to the amount of the bacterial liquid of 2:1, weighing the mineralized liquid to obtain a component B;
and mixing the component A and the component B to obtain the concrete microcrack repairing material.
The above examples 1 to 4 and comparative examples 1 to 2 were subjected to the relevant tests in accordance with the test items and test methods or standards shown in table 1, and the test results are shown in table 2.
TABLE 1 test items and test methods and standards
TABLE 2 test results
From the test results of table 2 above, the concrete microcrack repairing material of the invention has better mechanical properties and extremely short repairing period.
From the comparative data analysis of example 1 and comparative example 1, it can be seen that the shrinkage of the aqueous epoxy resin material can be significantly reduced by using the aqueous epoxy resin repair material in combination with the microorganism-induced calcium carbonate deposition material. Whereas comparative example 1, which uses only aqueous epoxy resin for repair, results in a final material with large shrinkage and low adhesive strength, which is easily debonded from the substrate.
From the comparative data analysis of the example 1, the comparative example 3 and the comparative example 4, it can be known that after the aqueous epoxy resin repairing material is compounded in the microorganism-induced calcium carbonate deposition material, the repairing period can be effectively shortened on the premise of ensuring the mechanical property of the repairing material.
As can be seen from the comparative data of example 1 and comparative example 2, the addition of nano calcium carbonate in advance to the aqueous epoxy resin emulsion in comparative example 2 significantly increases the viscosity, affects the pourability of the material, and is also disadvantageous to the mechanical properties of the material. Therefore, the microorganism is selected to induce the formation of calcium carbonate in the example 1 of the application, rather than the reason of using a compound calcium carbonate material.
Compared with the comparative examples 3 and 4, in the comparative examples 3 and 4, the aqueous epoxy resin emulsion and the epoxy resin curing agent are not added, so that the viscosity of the material is greatly reduced, and the material can overflow a concrete crack during pouring, thereby causing waste. And in the comparative example 4, the use amounts of the bacterial liquid and the mineralized liquid are both reduced, so that the repair period of the material is greatly increased and reaches 35d.
Compared with the comparative example 4, the bacterial liquid and the mineralized liquid used in the comparative example 3 have higher concentration, the speed of generating calcium carbonate by bacteria in a system through induction is higher, the repair period is short, but the technical problems of loose calcium carbonate deposition and poor mechanical property exist; the concentration of the bacterial liquid and the concentration of the mineralized liquid selected in the comparative example 4 are low, the reaction rate of the system is low, the repair cycle is long, but the formed calcium carbonate material is dense in deposition and good in mechanical property.
Although the present specification describes embodiments, not every embodiment includes only a single embodiment, and such descriptions are provided for clarity, and it is understood that the specification is incorporated herein by reference, and the embodiments described in each embodiment may be combined as appropriate to form other embodiments, which will be apparent to those skilled in the art.
Therefore, the above description is only a preferred embodiment of the present application, and is not intended to limit the scope of the present application; all changes which come within the meaning and range of equivalency of the claims are to be embraced within their scope.
Claims (10)
1. A concrete crack repairing material is characterized in that: the adhesive is prepared by mixing a component A and a component B, wherein:
the component A is a mixed solution of a waterborne epoxy resin emulsion and a bacterial solution, and the component B is a mixed solution of an epoxy resin curing agent and a mineralized solution;
the mineralized liquid is formed by mixing a calcium source and urea.
2. The concrete crack repairing material as set forth in claim 1, wherein: the component A comprises, by weight, 100 parts of a water-based epoxy resin emulsion and a bacterial liquid, wherein the weight part ratio of the water-based epoxy resin emulsion to the bacterial liquid is 70-90:30-10.
3. The concrete crack repairing material as set forth in claim 1, wherein: the aqueous epoxy resin emulsion in the component A is one of EP-2340W, BH644, EP-5024 and DS-5100.
4. The concrete crack repairing material as set forth in claim 1, wherein: the component A is prepared from bacillus sphaericus and a liquid culture solution in a volume ratio of 1:8 is configured; the liquid culture medium was prepared from 2g of sodium bicarbonate, 50g of nutrient broth and 1L of distilled water.
5. The concrete crack repairing material as set forth in claim 1, wherein: the epoxy resin curing agent in the component B is one of EH-2100W, BH560, MG-50 and 900S.
6. The concrete crack repairing material as set forth in claim 1, wherein: the mass ratio of the waterborne epoxy resin emulsion to the epoxy resin curing agent is 100: 133. 100: 100. 100, and (2) a step of: 55 or 100:20.
7. the concrete crack repairing material as set forth in claim 1, wherein: the calcium source is at least one of calcium nitrate, calcium formate, calcium lactate and calcium acetate.
8. The concrete crack repairing material as set forth in claim 1, wherein: the mass ratio of the mineralized liquid to the bacterial liquid is (1-3): 1.
9. a preparation method of a concrete microcrack repairing material is characterized by comprising the following steps: the method comprises the following steps:
s1, mixing the following components in parts by weight of 70-90:30-10, weighing the aqueous epoxy resin emulsion and the bacterial liquid, and uniformly stirring at normal temperature to obtain a component A;
s2, mixing a calcium source and urea according to a molar concentration ratio of (1-1.2): 1, mixing to obtain mineralized liquid;
s3, weighing the epoxy resin curing agent and the mineralized liquid, and uniformly stirring at normal temperature to obtain a component B;
and S4, mixing the component A and the component B, calculating the total solid content of the waterborne epoxy resin and the epoxy resin curing agent in the mixture, and controlling the total solid content to be 40% in a manner of adding water and stirring uniformly to obtain the concrete microcrack repairing material.
10. The method of claim 9, wherein: in the step S2, the mass ratio of the water-based epoxy resin emulsion to the epoxy resin curing agent is 100: 133. 100, and (2) a step of: 100. 100, and (2) a step of: 55 or 100:20, the mass ratio of the mineralized liquid to the bacterial liquid is (1-3): 1.
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