CN117209229A - Concrete crack gas-driven repair material and application method thereof - Google Patents
Concrete crack gas-driven repair material and application method thereof Download PDFInfo
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- 239000000463 material Substances 0.000 title claims abstract description 132
- 230000008439 repair process Effects 0.000 title claims abstract description 88
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000002893 slag Substances 0.000 claims abstract description 103
- 238000002156 mixing Methods 0.000 claims abstract description 63
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 50
- 239000000843 powder Substances 0.000 claims abstract description 49
- 239000002245 particle Substances 0.000 claims abstract description 38
- 238000010438 heat treatment Methods 0.000 claims abstract description 22
- 239000002994 raw material Substances 0.000 claims abstract description 11
- 239000011398 Portland cement Substances 0.000 claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 10
- 239000010959 steel Substances 0.000 claims abstract description 10
- 239000004576 sand Substances 0.000 claims abstract description 9
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims abstract description 8
- 239000000835 fiber Substances 0.000 claims abstract description 7
- 238000012423 maintenance Methods 0.000 claims abstract description 4
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims description 93
- 239000007788 liquid Substances 0.000 claims description 49
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 48
- 229910052751 metal Inorganic materials 0.000 claims description 24
- 239000000725 suspension Substances 0.000 claims description 24
- 239000002184 metal Substances 0.000 claims description 22
- 238000009210 therapy by ultrasound Methods 0.000 claims description 22
- 239000012265 solid product Substances 0.000 claims description 20
- 239000011248 coating agent Substances 0.000 claims description 19
- 238000000576 coating method Methods 0.000 claims description 19
- 239000012279 sodium borohydride Substances 0.000 claims description 17
- 229910000033 sodium borohydride Inorganic materials 0.000 claims description 17
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 13
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 13
- 229910021389 graphene Inorganic materials 0.000 claims description 13
- 239000007791 liquid phase Substances 0.000 claims description 13
- 239000011247 coating layer Substances 0.000 claims description 12
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 12
- 239000002253 acid Substances 0.000 claims description 11
- 238000002386 leaching Methods 0.000 claims description 11
- 239000012188 paraffin wax Substances 0.000 claims description 11
- 239000000126 substance Substances 0.000 claims description 11
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 claims description 9
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 8
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 8
- 239000003638 chemical reducing agent Substances 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 7
- 238000001556 precipitation Methods 0.000 claims description 7
- NKWPZUCBCARRDP-UHFFFAOYSA-L calcium bicarbonate Chemical compound [Ca+2].OC([O-])=O.OC([O-])=O NKWPZUCBCARRDP-UHFFFAOYSA-L 0.000 claims description 6
- 229910000020 calcium bicarbonate Inorganic materials 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 5
- 239000004917 carbon fiber Substances 0.000 claims description 5
- 239000003365 glass fiber Substances 0.000 claims description 4
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 4
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 4
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 4
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 claims description 3
- QWDJLDTYWNBUKE-UHFFFAOYSA-L magnesium bicarbonate Chemical compound [Mg+2].OC([O-])=O.OC([O-])=O QWDJLDTYWNBUKE-UHFFFAOYSA-L 0.000 claims description 3
- 239000002370 magnesium bicarbonate Substances 0.000 claims description 3
- 229910000022 magnesium bicarbonate Inorganic materials 0.000 claims description 3
- 235000014824 magnesium bicarbonate Nutrition 0.000 claims description 3
- 238000001291 vacuum drying Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 16
- 230000003213 activating effect Effects 0.000 abstract description 2
- 230000002349 favourable effect Effects 0.000 abstract 1
- 238000002360 preparation method Methods 0.000 description 29
- 238000010521 absorption reaction Methods 0.000 description 24
- 238000012360 testing method Methods 0.000 description 17
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 11
- 238000006243 chemical reaction Methods 0.000 description 11
- 239000006228 supernatant Substances 0.000 description 10
- 239000000706 filtrate Substances 0.000 description 9
- 238000003756 stirring Methods 0.000 description 9
- 238000006703 hydration reaction Methods 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- 238000000926 separation method Methods 0.000 description 7
- 239000004570 mortar (masonry) Substances 0.000 description 5
- 229920005646 polycarboxylate Polymers 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 230000036571 hydration Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 3
- 238000011049 filling Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 229910052938 sodium sulfate Inorganic materials 0.000 description 3
- 235000011152 sodium sulphate Nutrition 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 2
- 239000004327 boric acid Substances 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 229910001653 ettringite Inorganic materials 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000012615 aggregate Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- -1 and meanwhile Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- HOOWDPSAHIOHCC-UHFFFAOYSA-N dialuminum tricalcium oxygen(2-) Chemical compound [O--].[O--].[O--].[O--].[O--].[O--].[Al+3].[Al+3].[Ca++].[Ca++].[Ca++] HOOWDPSAHIOHCC-UHFFFAOYSA-N 0.000 description 1
- 230000003631 expected effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000007712 rapid solidification Methods 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
Classifications
-
- 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
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a concrete crack gas-driven repair material and a use method thereof. The concrete crack gas-driven repair material comprises the following components: 120-500 parts of Portland cement, 95-380 parts of gas-driven repair particles, 72-356 parts of sand, 30-90 parts of steel slag powder, 20-58 parts of aluminum sulfate powder, 12-30 parts of fiber and 200-440 parts of mixing water. The using method comprises the following steps: (i) And uniformly mixing the raw materials to obtain the air-driven repair material. (ii) And injecting the gas-driven repair material into a crack of the concrete structure, then carrying out microwave heating treatment on the gas-driven repair material, and carrying out natural maintenance after the completion. The invention utilizes the gas drive to promote the repairing material to enter the deep part of the crack more fully, is favorable for activating the crack surface, improves the binding force with the repairing material, and improves the repairing effect on the concrete crack.
Description
Technical Field
The invention relates to the technical field of concrete crack repair, in particular to a concrete crack gas-driven repair material and a use method thereof.
Background
The disclosure of this background section is only intended to increase the understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art already known to those of ordinary skill in the art.
The concrete is a heterogeneous brittle material formed by mixing sand aggregate, cement, water and other additional materials. Although concrete has good compressive resistance, cracking frequently occurs during later service due to low tensile strength. Concrete cracks are the most common engineering defect in many projects. Reinforcing materials such as reinforcing steel bars and the like in the concrete structure after cracks are generated are exposed and then are more easy to rust, meanwhile, the bearing capacity of the concrete structure is reduced due to the cracks, the aging of the concrete structure is accelerated due to moisture penetration, the durability is reduced, and the safety of the concrete structure is affected. Brittle failure is easily caused when the crack is serious, and safety accidents are caused.
However, as an inert material after curing, once a concrete structure is cracked, the repairing difficulty is high, the cost is high, and the repairing effect is not easy to reach the expected effect. Therefore, how to improve the repairing effect of cracks becomes an important problem for the later maintenance of the concrete structure. At present, a common repairing mode of concrete cracks is to smear concrete mortar on the cracks to form filling, and the concrete mortar is combined with the cracks into a whole after hardening to realize repairing. However, this method has a general problem that the concrete mortar cannot sufficiently enter the deep portion of the crack and the bonding force between the concrete mortar and the crack surface is insufficient, and the latter is liable to cause the problem that the repaired concrete mortar in the crack falls off again at a later stage.
Disclosure of Invention
The invention provides a concrete crack gas-driven repairing material and a use method thereof, which utilize gas driving to promote the repairing material to enter into the deep part of a crack more fully, and are helpful for activating the crack surface and improving the binding force between the repairing material and the repairing material, thereby improving the repairing effect on the concrete crack. Specifically, the technical scheme of the invention is as follows.
Firstly, the invention discloses a concrete crack gas-driven repairing material, which comprises the following raw materials in parts by weight: 120-500 parts of Portland cement, 95-380 parts of gas-driven repair particles, 72-356 parts of sand, 30-90 parts of steel slag powder, 20-58 parts of aluminum sulfate powder, 12-30 parts of fiber, 200-440 parts of mixing water and 5-20 parts of water reducer. Wherein: the gas-driven repair particles are prepared by the following method:
(1) And (3) placing the ferrosilicon slag in sulfuric acid for acid leaching treatment, separating out a solid product after the acid leaching treatment is finished, thus obtaining the modified ferrosilicon slag I, and simultaneously collecting a separated liquid phase for later use.
(2) Adding alkaline substance to neutralize residual sulfuric acid, and adding sodium borohydride (NaBH 4 ) And simultaneously carrying out ultrasonic treatment, separating out a solid product after precipitation of a precipitated substance is finished, collecting a separating liquid, vacuum drying the solid product to obtain metal micro powder, and adding sulfuric acid into the separating liquid to eliminate residual sodium borohydride to obtain the mixing water for later use.
(3) Mixing tetraethoxysilane liquid, bicarbonate powder and the metal micro powder, performing ultrasonic dispersion to form a suspension material, immersing the modified ferrosilicon slag I into the suspension material for ultrasonic treatment, standing after completion, and separating the modified ferrosilicon slag I to obtain modified ferrosilicon slag II.
(4) And (3) forming a coating liquid by the molten paraffin liquid and the graphene, immersing the modified ferrosilicon slag II into the coating liquid for coating, taking out the modified ferrosilicon slag II, cooling, and forming a coating layer on the surface of the modified ferrosilicon slag II to obtain the gas-driven repair particles.
Further, in the step (1), the feed liquid ratio of the ferrosilicon slag to the sulfuric acid is 1g: 20-30 ml. Optionally, the mass fraction of the sulfuric acid is 20-35%. The acid leaching treatment time is 1 to 1.5 hours. The grain size of the ferrosilicon slag is between 1 and 3mm.
Further, in step (2), the alkaline substance includes: at least one of sodium hydroxide, sodium carbonate, sodium bicarbonate, and the like.
Further, in the step (2), the mass fraction of the sodium borohydride in the system is 7-11%. Optionally, the ultrasonic treatment time is 20-25 min, and the ultrasonic power is 300-500W.
Further, in the step (2), the drying temperature is 80-95 ℃ and the time is 40-55 min.
Further, in the step (3), the ratio of the tetraethoxysilane liquid, the bicarbonate powder and the metal micropowder is 1L: 1-2 g: 5-8 g. Optionally, the ultrasonic dispersion time is 10-15 min, and the ultrasonic power is 300-500W.
Further, in step (3), the bicarbonate comprises: at least one of sodium bicarbonate, calcium bicarbonate and magnesium bicarbonate.
Further, in the step (3), the feed liquid ratio of the modified ferrosilicon slag I to the suspension material is 1g: 30-40 ml.
Further, in the step (3), the ultrasonic treatment time is 5-10 min, the ultrasonic power is 200-300W, and the standing time is 10-20 min.
Further, in the step (4), the ratio of the molten paraffin liquid to the graphene is 10 parts by weight: 0.8 to 1.5 weight portions.
Further, in the step (4), the thickness of the coating layer is controlled to be less than 0.5 mm.
Further, the fibers include any one of glass fibers, carbon fibers, and the like. Optionally, the length of the fibers is 5 to 10mm.
Secondly, the invention discloses a using method of the concrete crack gas-driven repairing material, which comprises the following steps:
(i) And uniformly mixing the raw material components of the concrete crack gas-driven repair material to obtain the gas-driven repair material for standby.
(ii) And injecting the gas-driven repair material into a crack of the concrete structure, then carrying out microwave heating treatment on the gas-driven repair material, and carrying out natural maintenance after the completion.
Further, the microwave heating frequency is 5-20 GHz, the power is 600-1000W, and the heating time is 30-150 s.
Compared with the prior art, the invention has at least the following beneficial technical effects:
as described above, the conventional method of repairing the crack of the concrete structure by filling the cement mortar has problems such as poor repairing effect. The invention provides a technical scheme for promoting the movement of the repairing material to the deep part of the crack by means of air driving, and the repairing effect is effectively improved. Therefore, the invention firstly takes porous ferrosilicon slag containing abundant metal elements such as iron, aluminum, magnesium and the like as raw materials, and dissolves out the metal elements after acid leaching treatment, one of the porous ferrosilicon slag can effectively enlarge the pores of the ferrosilicon slag, thereby facilitating the entry of the suspended materials. Both are convenient for preparing the metal micro powder for absorbing microwave heating by utilizing the dissolved metal element. In the invention, after the suspension materials formed by the metal micro powder, tetraethoxysilane liquid and bicarbonate powder are loaded into ferrosilicon slag, the suspension materials are further encapsulated into the ferrosilicon slag by adopting a coating layer formed by molten paraffin and graphene to form gas-driven repair particles. When the repairing material and the graphene are filled into cracks of the concrete structure and heated by microwaves, the graphene in the coating layer absorbs microwave heating to melt the coating layer, and meanwhile, metal micro powder in the ferrosilicon slag also absorbs microwave heating to heat the bicarbonate powder, so that carbon dioxide generated by decomposition of the bicarbonate powder overflows outwards from pores of the ferrosilicon slag, and the surrounding repairing material is driven to be filled into the deep parts of the cracks, so that each part of the cracks can be filled with the repairing material more fully, and more accurate repairing is realized. Meanwhile, graphene released after the cladding layer is melted is dispersed and enters the deep part of the crack in the movement process of the repairing material, the graphene can effectively improve the mechanical property and the impermeability of the repairing material, and the improvement of the impermeability of the repairing part by the mode is very important to the improvement of the repairing effect because the crack is a key part of the concrete structure where leakage occurs. Furthermore, in the process of hardening the repairing material, mixing water enters ferrosilicon slag, tetraethoxysilane is hydrolyzed into silicon dioxide particles under the action of water and the heat provided by hydration reaction to be filled in the pores of the ferrosilicon slag, the silicon dioxide particles have high reactivity, and the cementing material formed by the hydration reaction can be used for improving the compactness of the ferrosilicon slag, so that the problem of insufficient impermeability of the repairing part caused by porous ferrosilicon slag is prevented. Meanwhile, the compacted ferrosilicon slag has higher mechanical strength, and is beneficial to improving the repairing effect.
In addition, the separation liquid obtained in the step (2) is treated and then used as the mixing water of the repairing material, the separation liquid contains sodium sulfate formed after residual sulfuric acid is neutralized and sodium borohydride added later, and the sodium borohydride reacts to form sodium sulfate and boric acid after sulfuric acid is added again. The sodium sulfate is used as an alkali excitant to help to improve the hydration activity of the steel slag powder and the ferrosilicon slag, so that the steel slag powder not only serves as a micro aggregate to play a filling role, but also can undergo hydration reaction to form a cementing material to be better combined with a repairing material matrix; meanwhile, the ferrosilicon slag can be well combined with the repairing material matrix through hydration reaction, so that the strength of the repairing material is improved, and the repairing effect is improved. Meanwhile, the boric acid plays a role in retarding, so that more sufficient time is provided for the flow of the repair material in the cracks, and the situation that the cracks are not fully filled due to rapid solidification of the repair material is avoided. In addition, in the hydration process of the repair material, the carbon dioxide reacts with calcium hydroxide, which is a hydration product, to form calcium carbonate to be filled in the repair material, so that the compactness of the repair material is improved. In addition, aluminum sulfate in the repairing material can react with calcium hydroxide which is an original hydration product of concrete on a crack surface to form calcium sulfate and aluminum hydroxide, and the calcium sulfate and tricalcium aluminate in portland cement further react to form ettringite with micro-expansibility, and the ettringite and the aluminum hydroxide are filled at an interface of the repairing material and the crack surface together, so that the permeability resistance at the interface is improved. Meanwhile, the crack surface is activated to participate in the reaction in the mode, so that the binding force between the crack surface and the repair material is improved, the occurrence of falling of the repair material in the crack in the subsequent service process is reduced, and the repair effect is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
FIG. 1 is a graph showing the effect of the gas-driven repair particles prepared in example 1 below.
FIG. 2 is a graph showing the effect of pre-cracking of a concrete block prepared in example 1 according to the present invention.
FIG. 3 is a graph showing the effect of the gas-driven repair particles prepared in example 2 below.
Detailed Description
The invention will be further illustrated with reference to specific examples. It is to be understood that these examples are illustrative of the present invention and are not intended to limit the scope of the present invention. The experimental procedures, which do not address the specific conditions in the examples below, are generally carried out under conventional conditions or under conditions recommended by the manufacturer. In addition, 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 reagents or materials used in the present invention may be purchased in conventional manners, and unless otherwise indicated, they may be used in conventional manners in the art or according to the product specifications. In addition, any methods and materials similar or equivalent to those described herein can be used in the methods of the present invention. The preferred methods and materials described herein are illustrative only.
The concrete crack gas-driven repairing material and the using method thereof are further described in detail with reference to the specification, the drawings and the specific examples. It should be noted that the following examples and materials are only exemplary, and are not limiting on the technical scheme of the present invention. For example, the ferrosilicon slag listed below is only an example, and is not intended to explicitly show or imply that the preparation of the gas-driven repair material for concrete cracks of the present invention is limited to ferrosilicon slag of the following composition.
In the following examples, the main components of the ferrosilicon slag used include: siO (SiO) 2 52.7％、FeO 21.4％、Al 2 O 3 13.2%, caO 6.7%, mgO 4.1% and the balance of TiO 2 MnO, etc.
Example 1
A preparation method of a concrete crack gas-driven repair material comprises the following steps:
1. the preparation of the gas-driven repair particles comprises the following steps:
(1) Mixing ferrosilicon slag with the particle size distribution of 1-2 mm with sulfuric acid solution with the mass fraction of 30% according to the weight ratio of 1g: mixing 25ml of the materials in proportion, uniformly stirring, standing for 1h, carrying out acid leaching treatment, adding sodium carbonate to neutralize residual sulfuric acid, filtering out a solid product, obtaining modified ferrosilicon slag I, and collecting filtrate for later use.
(2) Adding sodium borohydride into the filtrate to form a liquid phase reaction system with the mass fraction of 10%, and then carrying out ultrasonic treatment on the liquid phase reaction system for 20min, wherein the ultrasonic power is 400W. After the precipitation of the precipitated substances is completed, the solid product is centrifugally separated, and the supernatant liquid after centrifugal separation is collected. And (3) drying the solid product in vacuum at 90 ℃ for 45min to obtain the metal micro powder. And adding sulfuric acid into the supernatant to eliminate residual sodium borohydride, thus obtaining mixing water for later use.
(3) Tetraethoxysilane liquid, sodium bicarbonate powder and the metal micropowder prepared in this example were mixed according to 1L:1.5g: after being mixed in a proportion of 7g, the mixture is dispersed for 15min (the ultrasonic power is 350W) to form a suspension material. And then mixing the modified ferrosilicon slag I with the suspension material according to the weight ratio of 1g: mixing in a proportion of 35ml, performing ultrasonic treatment for 10min (the ultrasonic power is 200W), standing for 15min after the completion, and separating out the modified ferrosilicon slag I, and marking the modified ferrosilicon slag I as modified ferrosilicon slag II.
(4) And mixing the heated and melted paraffin liquid with graphene according to a ratio of 10: and (3) mixing the materials according to a mass ratio of 0.45, and performing ultrasonic dispersion to form a coating liquid. And immersing the modified ferrosilicon slag II into the coating liquid for coating, taking out the modified ferrosilicon slag II, cooling to room temperature, and forming a coating layer with the thickness of 0.3mm on the surface of the modified ferrosilicon slag II to obtain the gas-driven repair particles (shown in figure 1).
2. The preparation method comprises the following steps of: 42.5 Portland cement 350 parts, the air-driven repair particles prepared in the embodiment 260 parts, river sand 280 parts, steel slag powder 40 parts, aluminum sulfate powder 24 parts, chopped glass fibers with the length of 7mm 20 parts, mixing water 305 parts and a polycarboxylate water reducer 11 parts. And mixing the raw materials and uniformly stirring to obtain the gas-driven repairing material.
3. Portland cement concrete test blocks with the dimensions of 150mm multiplied by 150mm are prepared, placed into a standard curing room with the temperature of 20+/-2 ℃ and the relative humidity of more than 95% for curing for 28 days, and the ultimate compressive strength of the concrete test blocks is tested by using a press machine. Additional concrete blocks were then pressed to obtain pre-split cracks (as shown in fig. 2) according to 80% of the measured ultimate compressive strength. Then grouting the gas-driven repair material prepared in the embodiment into the crack and heating by microwaves, wherein the heating power is 800W, the frequency is 10GHz, and the heating time is 60 seconds. Curing for 14 days in the same way after completion, and testing the compressive strength and capillary water absorption to reflect the crack repairing effect, wherein the result is as follows: compressive strength=51.76 MPa, capillary water absorption=1.8 mm.
Example 2
A preparation method of a concrete crack gas-driven repair material comprises the following steps:
1. the preparation of the gas-driven repair particles comprises the following steps:
(1) Mixing ferrosilicon slag with particle size distribution of 1-3 mm with 35% sulfuric acid solution according to the mass fraction of 1g: mixing 20ml of the materials in proportion, uniformly stirring, standing for 1.2h, carrying out acid leaching treatment, adding sodium hydroxide to neutralize residual sulfuric acid, filtering out a solid product, obtaining modified ferrosilicon slag I, and collecting filtrate for later use.
(2) Sodium borohydride is added into the filtrate to form a liquid phase reaction system with the mass fraction of 7%, and then the liquid phase reaction system is subjected to ultrasonic treatment for 20min, wherein the ultrasonic power is 500W. After the precipitation of the precipitated substances is completed, the solid product is centrifugally separated, and the supernatant liquid after centrifugal separation is collected. And (3) drying the solid product in vacuum at 80 ℃ for 55min to obtain the metal micro powder. And adding sulfuric acid into the supernatant to eliminate residual sodium borohydride, thus obtaining mixing water for later use.
(3) Tetraethoxysilane liquid, calcium bicarbonate powder and the metal micro powder prepared in this example were mixed according to 1L:1.8g:8g of the materials are mixed and then dispersed for 10min (the ultrasonic power is 300W) to form a suspension material. And then mixing the modified ferrosilicon slag I with the suspension material according to the weight ratio of 1g: mixing 40ml of the materials, performing ultrasonic treatment for 10min (the ultrasonic power is 300W), standing for 20min after the completion, and separating out the modified ferrosilicon slag I, and marking the modified ferrosilicon slag I as modified ferrosilicon slag II.
(4) And mixing the heated and melted paraffin liquid with graphene according to a ratio of 10: and (3) mixing the materials according to the mass ratio of 0.8, and performing ultrasonic dispersion to form a coating liquid. And immersing the modified ferrosilicon slag II into the coating liquid for coating, taking out the modified ferrosilicon slag II, cooling to room temperature, and forming a coating layer with the thickness of 0.5mm on the surface of the modified ferrosilicon slag II to obtain the gas-driven repair particles (shown in figure 3).
2. The preparation method comprises the following steps of: 42.5 Portland cement 120 weight parts, the air-driven repair particles prepared in the embodiment 95 weight parts, river sand 72 weight parts, steel slag powder 30 weight parts, aluminum sulfate powder 20 weight parts, chopped glass fibers with the length of 5mm 12 weight parts, mixing water 200 weight parts and a polycarboxylate water reducer 5 weight parts. And mixing the raw materials and uniformly stirring to obtain the gas-driven repairing material.
3. The concrete test block repaired by the air-driven repair material prepared in this example was tested for compressive strength and capillary water absorption in the same manner as in example 1 above, except that the heating power of the wave heating was 600W, the frequency was 20GHz, and the heating was performed for 30 seconds. The test results are: compressive strength=53.44 MPa, capillary water absorption=2.5 mm.
Implementation of the embodimentsExample 3
A preparation method of a concrete crack gas-driven repair material comprises the following steps:
1. the preparation of the gas-driven repair particles comprises the following steps:
(1) Mixing ferrosilicon slag with the particle size distribution of 2-3 mm with sulfuric acid solution with the mass fraction of 20% according to the weight ratio of 1g: mixing 25ml of the materials in proportion, uniformly stirring, standing for 1.5h, carrying out acid leaching treatment, adding sodium carbonate to neutralize residual sulfuric acid, filtering out a solid product, obtaining modified ferrosilicon slag I, and collecting filtrate for later use.
(2) Adding sodium borohydride into the filtrate to form a liquid phase reaction system with the mass fraction of 9%, and then carrying out ultrasonic treatment on the liquid phase reaction system for 25min, wherein the ultrasonic power is 300W. After the precipitation of the precipitated substances is completed, the solid product is centrifugally separated, and the supernatant liquid after centrifugal separation is collected. And (3) vacuum drying the solid product at 95 ℃ for 40min to obtain the metal micro powder. And adding sulfuric acid into the supernatant to eliminate residual sodium borohydride, thus obtaining mixing water for later use.
(3) Tetraethoxysilane liquid, magnesium bicarbonate powder and the metal micro powder prepared in this example were mixed according to 1L:1g: after being mixed in a proportion of 5g, the mixture is dispersed for 12min (the ultrasonic power is 400W) to form a suspension material. And then mixing the modified ferrosilicon slag I with the suspension material according to the weight ratio of 1g: mixing in a proportion of 35ml, performing ultrasonic treatment for 10min (the ultrasonic power is 250W), standing for 10min after the completion, and separating out the modified ferrosilicon slag I, and marking the modified ferrosilicon slag I as modified ferrosilicon slag II.
(4) And mixing the heated and melted paraffin liquid with graphene according to a ratio of 10: and (3) mixing the materials according to the mass ratio of 0.5, and performing ultrasonic dispersion to form a coating liquid. And immersing the modified ferrosilicon slag II into the coating liquid for coating, taking out the modified ferrosilicon slag II, cooling to room temperature, and forming a coating layer with the thickness of 0.3mm on the surface of the modified ferrosilicon slag II to obtain the gas-driven repair particles.
2. The preparation method comprises the following steps of: 42.5 Portland cement 500 weight portions, the air-driven repair particles prepared in the embodiment 380 weight portions, river sand 356 weight portions, steel slag powder 90 weight portions, aluminum sulfate powder 58 weight portions, chopped carbon fibers 30 weight portions with the length of 10mm, mixing water 440 weight portions and polycarboxylate water reducer 20 weight portions. And mixing the raw materials and uniformly stirring to obtain the gas-driven repairing material.
3. The concrete test block repaired by the air-driven repair material prepared in this example was tested for compressive strength and capillary water absorption in the same manner as in example 1 above, except that the heating power of the wave heating was 700W, the frequency was 15GHz, and the heating was performed for 120 seconds. The test results are: compressive strength=52.91 MPa, capillary water absorption=2.2 mm.
Example 4
A preparation method of a concrete crack gas-driven repair material comprises the following steps:
1. the preparation of the gas-driven repair particles comprises the following steps:
(1) Mixing ferrosilicon slag with particle size distribution of 1-2 mm with 25% sulfuric acid solution according to the mass fraction of 1g: mixing 30ml of the materials, uniformly stirring, standing for 1h, carrying out acid leaching treatment, adding sodium bicarbonate to neutralize residual sulfuric acid, filtering out a solid product, obtaining modified ferrosilicon slag I, and collecting filtrate for later use.
(2) Adding sodium borohydride into the filtrate to form a liquid phase reaction system with the mass fraction of 11%, and then carrying out ultrasonic treatment on the liquid phase reaction system for 20min, wherein the ultrasonic power is 450W. After the precipitation of the precipitated substances is completed, the solid product is centrifugally separated, and the supernatant liquid after centrifugal separation is collected. And (3) drying the solid product in vacuum at 90 ℃ for 50min to obtain the metal micro powder. And adding sulfuric acid into the supernatant to eliminate residual sodium borohydride, thus obtaining mixing water for later use.
(3) Tetraethoxysilane liquid, calcium bicarbonate powder and the metal micro powder prepared in this example were mixed according to 1L:2g: after mixing in a proportion of 7.5g, the mixture was subjected to ultrasonic dispersion for 12min (ultrasonic power 500W) to form a suspension material. And then mixing the modified ferrosilicon slag I with the suspension material according to the weight ratio of 1g: mixing 30ml of the materials, performing ultrasonic treatment for 5min (the ultrasonic power is 300W), standing for 15min after the completion, and separating out the modified ferrosilicon slag I, and marking the modified ferrosilicon slag I as modified ferrosilicon slag II.
(4) And mixing the heated and melted paraffin liquid with graphene according to a ratio of 10: and (3) mixing the materials according to a mass ratio of 1.5, and performing ultrasonic dispersion to form a coating liquid. And immersing the modified ferrosilicon slag II into the coating liquid for coating, taking out the modified ferrosilicon slag II, cooling to room temperature, and forming a coating layer with the thickness of 0.4mm on the surface of the modified ferrosilicon slag II to obtain the gas-driven repair particles.
2. The preparation method comprises the following steps of: 42.5 Portland cement 400 weight parts, the gas-driven repair particles prepared in the embodiment 320 weight parts, river sand 305 weight parts, steel slag powder 45 weight parts, aluminum sulfate powder 25 weight parts, chopped carbon fiber 24 weight parts with the length of 6mm, mixing water 390 weight parts and a polycarboxylate water reducer 16 weight parts. And mixing the raw materials and uniformly stirring to obtain the gas-driven repairing material.
3. The concrete test block repaired by the air-driven repair material prepared in this example was tested for compressive strength and capillary water absorption in the same manner as in example 1 above, except that the heating power of the wave heating was 1000W, the frequency was 5GHz, and the heating was performed for 150 seconds. The test results are: compressive strength= 52.23MPa, capillary water absorption=2.7 mm.
Example 5
The preparation method of the concrete crack gas-driven repair material is the same as that of the embodiment 1, and the difference is that: the preparation method of the gas-driven repair particles comprises the following step (3): tetraethoxysilane liquid and the metal micropowder prepared in this example were mixed in an amount of 1L: after being mixed in a proportion of 7g, the mixture is dispersed for 15min (the ultrasonic power is 350W) to form a suspension material. And then mixing the modified ferrosilicon slag I with the suspension material according to the weight ratio of 1g: and (3) carrying out ultrasonic treatment for 10min (the ultrasonic power is 200W) after mixing in a proportion of 35ml, standing for 15min after completion, and separating out the modified ferrosilicon slag I, namely the modified ferrosilicon slag II.
The compressive strength and capillary water absorption of the concrete test block repaired by the air-driven repair material prepared in this example were tested in the same manner as in example 1, and the results were: compressive strength= 44.37MPa, capillary water absorption=6.4 mm.
Example 6
The preparation method of the concrete crack gas-driven repair material is the same as that of the embodiment 1, and the difference is that: the preparation method of the gas-driven repair particles comprises the following step (3): tetraethoxysilane liquid and sodium bicarbonate powder were mixed according to 1L: after mixing in a proportion of 1.5g, the mixture was subjected to ultrasonic dispersion for 15min (ultrasonic power: 350W) to form a suspension material. And then mixing the modified ferrosilicon slag I with the suspension material according to the weight ratio of 1g: mixing in a proportion of 35ml, performing ultrasonic treatment for 10min (the ultrasonic power is 200W), standing for 15min after the completion, and separating out the modified ferrosilicon slag I, and marking the modified ferrosilicon slag I as modified ferrosilicon slag II.
The compressive strength and capillary water absorption of the concrete test block repaired by the air-driven repair material prepared in this example were tested in the same manner as in example 1, and the results were: compressive strength=46.82 MPa, capillary water absorption=6.1 mm.
Example 7
The preparation method of the concrete crack gas-driven repair material is the same as that of the embodiment 4, and the difference is that: the preparation method of the gas-driven repair particles comprises the following step (3): molten paraffin liquid, calcium bicarbonate powder and the metal micro powder prepared in this example were mixed according to 1L:2g: after mixing in a proportion of 7.5g, the mixture was subjected to ultrasonic dispersion for 12min (ultrasonic power 500W) to form a suspension material. And then mixing the modified ferrosilicon slag I with the suspension material according to the weight ratio of 1g: mixing 30ml of the materials, performing ultrasonic treatment for 5min (the ultrasonic power is 300W), standing for 15min after the completion of the ultrasonic treatment, and separating the modified ferrosilicon slag I to obtain the modified ferrosilicon slag II.
The compressive strength and capillary water absorption of the concrete test block repaired by the air-driven repair material prepared in this example were tested in the same manner as in example 4 above, and the results were: compressive strength=48.06 MPa, capillary water absorption=5.3 mm.
Example 8
The preparation method of the concrete crack gas-driven repair material is the same as that of the embodiment 2, and the difference is that: the step (4) of the preparation method of the gas-driven repair particles is as follows: immersing the modified ferrosilicon slag II into melted paraffin liquid for coating, taking out the modified ferrosilicon slag II, cooling to room temperature, and forming a coating layer with the thickness of 0.5mm on the surface of the modified ferrosilicon slag II to obtain the gas-driven repair particles.
The compressive strength and capillary water absorption of the concrete test block repaired by the air-driven repair material prepared in this example were tested in the same manner as in example 2 above, and the results were: compressive strength=46.18 MPa, capillary water absorption=4.9 mm.
Example 9
The preparation method of the concrete crack gas-driven repair material is the same as that of the embodiment 3, and the difference is that: the preparation method of the air-driven repair particles does not comprise the step (4), namely the modified ferrosilicon slag II prepared in the step (3) is used as the air-driven repair particles in the embodiment.
The compressive strength and capillary water absorption of the concrete test block repaired by the air-driven repair material prepared in this example were tested in the same manner as in example 3 above, and the results were: compressive strength=45.31 MPa, capillary water absorption=5.1 mm.
Example 10
The preparation method of the concrete crack gas-driven repair material is the same as that of the embodiment 4, and the difference is that: the preparation method of the gas-driven repair particles comprises the following step (3): tetraethoxysilane liquid, calcium bicarbonate powder and the metal micro powder prepared in this example were mixed according to 1L:2g: after mixing in a proportion of 7.5g, the mixture was subjected to ultrasonic dispersion for 12min (ultrasonic power 500W) to form a suspension material. Then, the ferrosilicon slag which is not subjected to any acid leaching treatment is mixed with the suspension material according to the weight ratio of 1g: mixing 30ml of the materials, performing ultrasonic treatment for 5min (the ultrasonic power is 300W), standing for 15min after the completion, and separating out the modified ferrosilicon slag I, and marking the modified ferrosilicon slag I as modified ferrosilicon slag II.
The compressive strength and capillary water absorption of the concrete test block repaired by the air-driven repair material prepared in this example were tested in the same manner as in example 4 above, and the results were: compressive strength=49.52 MPa, capillary water absorption=3.2 mm.
Example 11
The preparation method of the concrete crack gas-driven repair material is the same as that of the embodiment 2, and the difference is that: the step (2) of the preparation method of the gas-driven repair particles is as follows: sodium borohydride is added into the filtrate to form a liquid phase reaction system with the mass fraction of 7%, and then the liquid phase reaction system is subjected to ultrasonic treatment for 20min, wherein the ultrasonic power is 500W. After the precipitation of the precipitated substances is completed, the solid product is centrifugally separated, and the supernatant liquid after centrifugal separation is collected. And (3) drying the solid product in vacuum at 80 ℃ for 55min to obtain the metal micro powder. The supernatant was used as the mixing water in this example.
3. The compressive strength and capillary water absorption of the concrete test block repaired by the air-driven repair material prepared in this example were tested in the same manner as in example 2 above, and the results were: compressive strength= 47.66MPa, capillary water absorption=4.7 mm.
Example 12
The preparation of the concrete crack gas-driven repair material comprises the following steps: the preparation method comprises the following steps of: 42.5 Portland cement 500 weight portions, the air-driven repair particles prepared in the embodiment 380 weight portions, river sand 356 weight portions, steel slag powder 90 weight portions, chopped carbon fiber 30 weight portions with the length of 10mm, mixing water 440 weight portions and polycarboxylate water reducer 20 weight portions. And mixing the raw materials and uniformly stirring to obtain the gas-driven repairing material.
The compressive strength and capillary water absorption of the concrete test block repaired by the air-driven repair material prepared in this example were tested in the same manner as in example 3 above, and the results were: compressive strength=50.39 MPa, capillary water absorption=3.6 mm.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The gas-driven repairing material for the concrete cracks is characterized by comprising the following raw materials in parts by weight: 120-500 parts of Portland cement, 95-380 parts of gas-driven repair particles, 72-356 parts of sand, 30-90 parts of steel slag powder, 20-58 parts of aluminum sulfate powder, 12-30 parts of fiber, 200-440 parts of mixing water and 5-20 parts of water reducer; wherein: the gas-driven repair particles are prepared by the following method:
(1) Placing the ferrosilicon slag in sulfuric acid for acid leaching treatment, separating out a solid product after the acid leaching treatment is completed, thus obtaining modified ferrosilicon slag I, and simultaneously collecting a separated liquid phase for later use;
(2) Adding alkaline substances to neutralize residual sulfuric acid in the liquid phase, then adding sodium borohydride, simultaneously carrying out ultrasonic treatment, separating out a solid product after precipitation of a precipitated substance is finished, collecting a separating liquid, vacuum drying the solid product to obtain metal micro powder, and adding sulfuric acid into the separating liquid to eliminate residual sodium borohydride to obtain mixing water for later use;
(3) Mixing tetraethoxysilane liquid, bicarbonate powder and the metal micro powder, performing ultrasonic dispersion to form a suspension material, immersing the modified ferrosilicon slag I into the suspension material for ultrasonic treatment, standing after completion, and separating the modified ferrosilicon slag I to obtain modified ferrosilicon slag II.
(4) And (3) forming a coating liquid by the molten paraffin liquid and the graphene, immersing the modified ferrosilicon slag II into the coating liquid for coating, taking out the modified ferrosilicon slag II, cooling, and forming a coating layer on the surface of the modified ferrosilicon slag II to obtain the gas-driven repair particles.
2. The concrete crack gas driven repair material according to claim 1, wherein in the step (1), the feed liquid ratio of the ferrosilicon slag to sulfuric acid is 1g: 20-30 ml;
optionally, the mass fraction of the sulfuric acid is 20-35%
Optionally, the grain size of the ferrosilicon slag is between 1 and 3mm.
3. The concrete crack gas driven repair material according to claim 1, wherein in the step (2), the alkaline substance includes at least one of sodium hydroxide, sodium carbonate, and sodium bicarbonate.
4. The concrete crack gas-driven repair material according to claim 1, wherein in the step (2), the mass fraction of sodium borohydride in the system is 7-11%;
optionally, in the step (2), the ultrasonic treatment time is 20-25 min, and the ultrasonic power is 300-500W;
optionally, in the step (2), the drying temperature is 80-95 ℃ and the time is 40-55 min.
5. The concrete crack gas driven repair material according to claim 1, wherein in the step (3), the ratio of the tetraethoxysilane liquid, the bicarbonate powder and the metal micro powder is 1L: 1-2 g: 5-8 g;
optionally, in the step (3), the ultrasonic dispersion time is 10-15 min, and the ultrasonic power is 300-500W;
optionally, in step (3), the bicarbonate comprises at least one of sodium bicarbonate, calcium bicarbonate, and magnesium bicarbonate.
6. The concrete crack gas driven repair material according to claim 1, wherein in the step (3), the feed liquid ratio of the modified ferrosilicon slag I to the suspension material is 1g: 30-40 ml;
optionally, in the step (3), the ultrasonic treatment time is 5-10 min, the ultrasonic power is 200-300W, and the standing time is 10-20 min.
7. The concrete crack gas driven repair material according to claim 1, wherein in the step (4), the ratio of the molten paraffin liquid to graphene is 10 parts by weight: 0.8 to 1.5 weight portions;
optionally, in step (4), the thickness of the coating layer is controlled below 0.5 mm.
8. The concrete crack gas driven repair material of claim 1, wherein the fibers comprise any one of glass fibers and carbon fibers; optionally, the length of the fibers is 5 to 10mm.
9. The method for using the concrete crack gas-driven repair material according to any one of claims 1 to 8, comprising the following steps:
(i) Uniformly mixing raw material components of the concrete crack gas-driven repairing material to obtain the gas-driven repairing material for later use;
(ii) And injecting the gas-driven repair material into a crack of the concrete structure, then carrying out microwave heating treatment on the gas-driven repair material, and carrying out natural maintenance after the completion.
10. The method for using the concrete crack gas-driven repairing material according to claim 9, wherein the microwave heating frequency is 5-20 GHz, the power is 600-1000W, and the heating time is 30-150 s.
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