CN115974490A - Anti-erosion concrete and preparation method thereof - Google Patents
Anti-erosion concrete and preparation method thereof Download PDFInfo
- Publication number
- CN115974490A CN115974490A CN202310011435.5A CN202310011435A CN115974490A CN 115974490 A CN115974490 A CN 115974490A CN 202310011435 A CN202310011435 A CN 202310011435A CN 115974490 A CN115974490 A CN 115974490A
- Authority
- CN
- China
- Prior art keywords
- parts
- red mud
- concrete
- cement
- wet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000004567 concrete Substances 0.000 title claims abstract description 82
- 238000002360 preparation method Methods 0.000 title description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 46
- 239000004576 sand Substances 0.000 claims abstract description 35
- 239000002028 Biomass Substances 0.000 claims abstract description 34
- 239000004568 cement Substances 0.000 claims abstract description 32
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 29
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 22
- 239000010959 steel Substances 0.000 claims abstract description 22
- 239000000654 additive Substances 0.000 claims abstract description 16
- 230000000996 additive effect Effects 0.000 claims abstract description 16
- 238000003756 stirring Methods 0.000 claims description 65
- 241000196324 Embryophyta Species 0.000 claims description 53
- 239000003795 chemical substances by application Substances 0.000 claims description 26
- 239000000203 mixture Substances 0.000 claims description 25
- 238000000034 method Methods 0.000 claims description 24
- 238000002156 mixing Methods 0.000 claims description 24
- 239000003638 chemical reducing agent Substances 0.000 claims description 19
- 230000003628 erosive effect Effects 0.000 claims description 15
- 239000002245 particle Substances 0.000 claims description 15
- 239000002893 slag Substances 0.000 claims description 15
- 239000010902 straw Substances 0.000 claims description 14
- 239000002518 antifoaming agent Substances 0.000 claims description 12
- 238000011068 loading method Methods 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 8
- 238000012216 screening Methods 0.000 claims description 8
- 244000303040 Glycyrrhiza glabra Species 0.000 claims description 7
- 235000006200 Glycyrrhiza glabra Nutrition 0.000 claims description 7
- 244000183278 Nephelium litchi Species 0.000 claims description 7
- 241001412225 Firmiana simplex Species 0.000 claims description 6
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 6
- 244000269722 Thea sinensis Species 0.000 claims description 6
- 244000273928 Zingiber officinale Species 0.000 claims description 6
- 235000006886 Zingiber officinale Nutrition 0.000 claims description 6
- 235000008397 ginger Nutrition 0.000 claims description 6
- 235000009569 green tea Nutrition 0.000 claims description 6
- 229920000570 polyether Polymers 0.000 claims description 6
- 229920001296 polysiloxane Polymers 0.000 claims description 6
- 240000005979 Hordeum vulgare Species 0.000 claims description 5
- 235000007340 Hordeum vulgare Nutrition 0.000 claims description 5
- 240000007594 Oryza sativa Species 0.000 claims description 5
- 235000007164 Oryza sativa Nutrition 0.000 claims description 5
- 240000008042 Zea mays Species 0.000 claims description 5
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 claims description 5
- 235000002017 Zea mays subsp mays Nutrition 0.000 claims description 5
- 239000003513 alkali Substances 0.000 claims description 5
- 235000005822 corn Nutrition 0.000 claims description 5
- 235000009566 rice Nutrition 0.000 claims description 5
- 235000001453 Glycyrrhiza echinata Nutrition 0.000 claims description 4
- 235000017382 Glycyrrhiza lepidota Nutrition 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 4
- 229940010454 licorice Drugs 0.000 claims description 4
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 claims description 3
- 238000004131 Bayer process Methods 0.000 claims description 3
- CBOCVOKPQGJKKJ-UHFFFAOYSA-L Calcium formate Chemical compound [Ca+2].[O-]C=O.[O-]C=O CBOCVOKPQGJKKJ-UHFFFAOYSA-L 0.000 claims description 3
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 claims description 3
- 239000011398 Portland cement Substances 0.000 claims description 3
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 claims description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 3
- 125000000217 alkyl group Chemical group 0.000 claims description 3
- 229940044172 calcium formate Drugs 0.000 claims description 3
- 235000019255 calcium formate Nutrition 0.000 claims description 3
- 239000004281 calcium formate Substances 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- -1 polysiloxane Polymers 0.000 claims description 3
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 238000005245 sintering Methods 0.000 claims description 3
- 229920005552 sodium lignosulfonate Polymers 0.000 claims description 3
- 239000010936 titanium Substances 0.000 claims description 3
- 229910052719 titanium Inorganic materials 0.000 claims description 3
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 claims description 3
- 235000015742 Nephelium litchi Nutrition 0.000 claims description 2
- 239000011414 polymer cement Substances 0.000 claims description 2
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 claims 2
- 235000014698 Brassica juncea var multisecta Nutrition 0.000 claims 1
- 235000006008 Brassica napus var napus Nutrition 0.000 claims 1
- 240000000385 Brassica napus var. napus Species 0.000 claims 1
- 235000006618 Brassica rapa subsp oleifera Nutrition 0.000 claims 1
- 235000004977 Brassica sinapistrum Nutrition 0.000 claims 1
- 239000010907 stover Substances 0.000 claims 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims 1
- 238000005260 corrosion Methods 0.000 abstract description 41
- 230000007797 corrosion Effects 0.000 abstract description 35
- 239000000463 material Substances 0.000 abstract description 14
- 239000011241 protective layer Substances 0.000 abstract description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052799 carbon Inorganic materials 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 239000003292 glue Substances 0.000 abstract description 3
- 238000005411 Van der Waals force Methods 0.000 abstract description 2
- 230000036982 action potential Effects 0.000 abstract description 2
- 238000001179 sorption measurement Methods 0.000 abstract description 2
- 239000002956 ash Substances 0.000 description 66
- 230000000052 comparative effect Effects 0.000 description 15
- 239000003112 inhibitor Substances 0.000 description 12
- 230000000694 effects Effects 0.000 description 10
- 230000005764 inhibitory process Effects 0.000 description 9
- 238000012360 testing method Methods 0.000 description 9
- 239000002699 waste material Substances 0.000 description 9
- 230000009286 beneficial effect Effects 0.000 description 8
- 230000008901 benefit Effects 0.000 description 6
- 238000011161 development Methods 0.000 description 6
- 229910052500 inorganic mineral Inorganic materials 0.000 description 5
- 239000011707 mineral Substances 0.000 description 5
- 239000002910 solid waste Substances 0.000 description 5
- 230000007704 transition Effects 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 239000013530 defoamer Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 239000004575 stone Substances 0.000 description 4
- 238000003763 carbonization Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 239000010881 fly ash Substances 0.000 description 3
- LPLVUJXQOOQHMX-QWBHMCJMSA-N glycyrrhizinic acid Chemical compound O([C@@H]1[C@@H](O)[C@H](O)[C@H](O[C@@H]1O[C@@H]1C([C@H]2[C@]([C@@H]3[C@@]([C@@]4(CC[C@@]5(C)CC[C@@](C)(C[C@H]5C4=CC3=O)C(O)=O)C)(C)CC2)(C)CC1)(C)C)C(O)=O)[C@@H]1O[C@H](C(O)=O)[C@@H](O)[C@H](O)[C@H]1O LPLVUJXQOOQHMX-QWBHMCJMSA-N 0.000 description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 3
- 235000011477 liquorice Nutrition 0.000 description 3
- 230000002588 toxic effect Effects 0.000 description 3
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- 241001464837 Viridiplantae Species 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- DGVVJWXRCWCCOD-UHFFFAOYSA-N naphthalene;hydrate Chemical compound O.C1=CC=CC2=CC=CC=C21 DGVVJWXRCWCCOD-UHFFFAOYSA-N 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 238000009736 wetting Methods 0.000 description 2
- 238000003915 air pollution Methods 0.000 description 1
- 238000000627 alternating current impedance spectroscopy Methods 0.000 description 1
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 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
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006056 electrooxidation reaction Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000011413 geopolymer cement Substances 0.000 description 1
- 229920003041 geopolymer cement Polymers 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 238000001027 hydrothermal synthesis Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000269 nucleophilic effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- RAFRTSDUWORDLA-UHFFFAOYSA-N phenyl 3-chloropropanoate Chemical compound ClCCC(=O)OC1=CC=CC=C1 RAFRTSDUWORDLA-UHFFFAOYSA-N 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000011253 protective coating Substances 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 231100000563 toxic property Toxicity 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 an anti-erosion concrete which is characterized by comprising the following components in parts by weight: 5-20 parts of plant ash, 4-15 parts of wet carbonized red mud, 0.1-5 parts of biomass derived carbon dots, 10-20 parts of cement, 25-45 parts of porous aggregate, 20-40 parts of reclaimed sand, 0.2-6 parts of an additive and 15-35 parts of water; many active molecules in the biomass derived carbon points are accumulated on the surface of steel through Van der Waals force or other intermolecular action potential, cathode reaction is inhibited in the early corrosion stage, anode reaction is inhibited in the later corrosion stage, and finally an adsorption film is formed on the surface of the steel bar to relieve the corrosion of the steel bar, so that a protective layer formed on the surface of the steel bar by glue materials such as wet-type carbonized red mud and plant ash is enhanced, and the three cooperate with each other to provide a protective layer for the steel bar and relieve the corrosion of the steel bar.
Description
Technical Field
The invention relates to the technical field of concrete, in particular to anti-corrosion concrete and a preparation method thereof, which are used for reducing the corrosion speed of metal or alloy materials fixed in the concrete and prolonging the service life of the metal or alloy materials.
Background
The steel bar can work with concrete as one of main building materials, but is easily corroded in corrosive environments such as chloride corrosion, concrete carbonization and stray current interference, and the like, so that structural failure is often caused, and economic loss and casualties are caused. Therefore, it is important to improve the corrosion resistance of the steel bars in the concrete. Researchers have used corrosion inhibitors, corrosion-resistant steel, protective coatings and other corrosion-resistant methods, wherein the use of concrete-assisted cementitious materials has been widely used due to their low cost and good effect. Corrosion inhibitors are considered to be one of the most convenient and effective techniques. Conventional inorganic corrosion inhibitors have been banned by many countries due to their toxic properties. With the gradual expansion of the environmental protection requirement in the capital construction industry, green and clean reinforced concrete corrosion inhibitors are gradually valued by research and development personnel.
Disclosure of Invention
The invention aims to provide anti-erosion concrete, which solves the problems that the traditional inorganic corrosion inhibitor added into concrete is toxic and harmful, and does not meet the requirements of health, green and clean development.
The invention provides an anti-erosion concrete which comprises the following components in parts by weight:
5-20 parts of plant ash, 4-15 parts of wet-type carbonized red mud, 0.1-5 parts of biomass-derived carbon dots, 10-20 parts of cement, 25-45 parts of porous aggregate, 20-40 parts of reclaimed sand, 0.2-6 parts of an additive and 15-35 parts of water.
As a possible implementation manner, the plant ash includes at least one of rice hull ash, highland barley straw ash, rape straw ash and corn straw ash. Provides various choices of plant ash, and is beneficial to the sustainability of practical application.
As a possible implementation manner, the wet carbonized red mud includes at least one of bayer process red mud, sintering process red mud, and mixed process red mud. Provides various choices of wet carbonized red mud, and is beneficial to the sustainability of practical application.
As a possible implementation, the biomass-derived carbon dots are extracted from one or a combination of more of green tea, licorice, ginger, waste phoenix tree leaf, and lychee leaf. Provides various choices of biomass derived carbon points, and is beneficial to the sustainability of practical application.
As a possible implementation mode, the additive comprises the following components in parts by weight:
8-15wt% of water reducing agent, 5-12wt% of air entraining agent, 8-15wt% of defoaming agent and 60-75wt% of early strength agent; preferably, the water reducing agent comprises at least one of a naphthalene water reducing agent, a sodium lignosulfonate water reducing agent, an amino water reducing agent and a polycarboxylic acid water reducing agent; preferably, the air entraining agent comprises at least one of rosin resin type air entraining agent, alkyl group type air entraining agent and sulfonic acid type air entraining agent; preferably, the defoamer comprises at least one of a silicone defoamer, a polyether defoamer and a polyether modified polysiloxane defoamer; preferably, the early strength agent comprises at least one of nitrite, calcium formate, compound early strength agent and triethanolamine.
As a possible implementation, the cement includes at least one of commercially available ordinary portland cement, slag-based polymer cement, alkali-activated slag cement, and sulfoaluminate cement. Provides various choices of cement, and is beneficial to the sustainability of practical application.
As a possible implementation, the porous aggregate includes at least one of heavy titanium slag, blast furnace slag, steel slag, and recycled coarse aggregate. Provides various choices of porous aggregate, and is beneficial to the sustainability of practical application.
Based on the problems, the invention also provides a preparation method of the anti-erosion concrete, which comprises the steps of drying the plant ash and the wet carbonized red mud, and then screening to obtain particles with the particle size of less than or equal to 0.075 mm;
mixing the porous aggregate and the reclaimed sand, adding the plant ash, the wet-type carbonized red mud and the cement, and uniformly stirring to obtain a mixture;
and (3) uniformly mixing the water and the biomass derived carbon dots, adding the mixture and the additive into the mixture, uniformly stirring, and then loading the mixture into a mold for molding and maintaining.
As a possible preferred way, the porous aggregate is wetted with water before mixing it with the reclaimed sand.
When the technical scheme is adopted, due to the characteristics of specific porosity and high water absorption of the porous aggregate, the porous aggregate is wetted by adding water, so that the porous aggregate has an internal curing function in concrete, an interface transition area is effectively improved, part of powder enters the porous aggregate, the binding power between slurry and the aggregate is improved, and the strength of anti-erosion concrete is integrally improved.
Compared with the prior art, the invention has the following beneficial effects:
the red mud is the polluting waste residue discharged when extracting the alumina in the aluminum industry, has strong alkalinity (the general pH value is between 12 and 13) and large specific surface area (the general pH value is between 64.09 and 186.9 m) 2 /g), and the like, and the comprehensive utilization difficulty is high; the porous aggregate is mainly industrial solid waste; the reclaimed sand is produced by crushing concrete or machine-made sand. The invention adopts the green plant ash and the industrial solid waste red mud as mineral admixture to replace partial cement, utilizes the waste plant ash, the wet carbonized red mud and the biomass derived carbon dots while consuming a large amount of green plant ash and red mud, overcomes the problem of great difficulty in utilizing the waste plant ash, the wet carbonized red mud and the biomass derived carbon dots, and solves the problems of environmental pollution, atmospheric pollution and air pollution existing in the current treatment modeAnd the like.
The biomass derived carbon dots are positioned in the high alkaline environment provided by the plant ash and the wet carbonized red mud, and the hydroxyl functional groups and Fe 2+ Or Fe 3+ Chemisorption occurs to react with Cl - To create competition, the hydroxyl functional group is more nucleophilic than Cl - Thus Cl - With Fe 2+ Or Fe 3+ The combination of (a) is easily substituted by hydroxyl functional groups, so that a good corrosion inhibition effect can be achieved. Many active molecules in the biomass derived carbon points are accumulated on the surface of steel through Van der Waals force or other intermolecular action potential, the cathode reaction is inhibited in the early corrosion stage, the anode reaction is inhibited in the later corrosion stage, and finally an adsorption film is formed on the surface of the steel bar to relieve the corrosion of the steel bar, so that a protective layer formed on the surface of the steel bar by glue materials such as wet carbonized red mud and plant ash is enhanced, and the three cooperate with each other to provide a protective layer for the steel bar and relieve the corrosion of the steel bar.
The coarse aggregate adopts porous aggregate, and the characteristics of porous structure and high water absorption of the porous aggregate are utilized, and a treatment method similar to a light aggregate is adopted, so that the concrete has an internal curing function, the interface transition area is improved, the binding force between the aggregate and slurry is improved, and the strength of the concrete is improved.
The fine aggregate adopts the reclaimed sand, and a new development direction is explored under the conditions that natural sand resources are increasingly deficient and exploitation is forbidden, so that the method is beneficial to green and sustainable development of the building industry, reduces the production cost, and has good economic and social benefits.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more apparent, the present invention is described in further detail below. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Aiming at the toxic and harmful problems of the inorganic corrosion inhibitor adopted in the existing concrete, the inventor of the invention finds that the waste plant ash, wet-type carbonized red mud and biomass derived carbon dots replace the inorganic corrosion inhibitor and part of cement in the existing concrete by accident, thereby not only having good corrosion inhibition effect and mechanical property and reducing the using amount of the cement, but also solving the problems of difficult comprehensive utilization of the plant ash, the wet-type carbonized red mud and the biomass derived carbon dots and serious environmental pollution; therefore, the method is more in line with the green sustainable development strategy of the building industry and the concept.
In a first aspect, the present invention provides an erosion resistant concrete comprising the following components:
plant ash, wet-carbonized red mud, biomass-derived carbon dots cement, porous aggregate, reclaimed sand, an additive and water.
As used herein, the term "plant ash" refers to plant ash produced by burning crops at 500-700 ℃ and having a high yield, wherein the plant ash with a particle size of less than 100 microns has a pozzolanic property, and when the plant ash is added into concrete, the plant ash has a pozzolanic effect and a filling effect, and the plant ash has the characteristics of low cost and high alkalinity, and has good compatibility and chemical inertness with cement, mortar and concrete.
As used herein, the term "wet carbonized red mud" refers to a red mud obtained by subjecting ordinary red mud to a wet carbonization treatment. The common red mud has the characteristics of good specific surface area, good dispersibility and high alkali content, but the common red mud has low activity, so the common red mud cannot be directly used in the invention. The common red mud has a large amount of calcium carbonate crystals and aluminum-silicon gel after wet carbonization treatment, so that the activity of the red mud is greatly improved, and the red mud can be applied to concrete as a mineral admixture, so that the compactness and the alkaline environment of a concrete structure can be improved, a compact steel-mortar interface is formed on the surface of a steel bar, and additional protection is provided for the embedded steel bar, thereby preventing steel corrosion caused by chloride corrosion.
As used herein, the biomass-derived carbon dots are obtained by hydrothermal extraction of plants and have good antioxidant activity. Compared with the traditional inorganic corrosion inhibitor, the preparation method has the advantages of simple production, environmental protection, rich raw material sources, good dispersibility, adjustable surface groups and the like.
According to the invention, the biomass-derived carbon dots are applied to the concrete, and compared with the traditional inorganic corrosion inhibitor, the biomass-derived carbon dots have the advantages of simple production, environmental protection, rich raw material sources, good dispersibility, adjustable surface groups and the like.
In the invention, the porous aggregate has the characteristics of porosity and high water absorption, and is subjected to wetting treatment before mixing, such as: adopting a treatment method similar to that of the lightweight aggregate; the concrete has an internal curing function, the interface transition area is improved, the binding power of aggregate and slurry is improved, and the obtained concrete has good mechanical properties.
In the invention, the reclaimed sand is adopted, and under the conditions that natural sand resources are increasingly deficient and exploitation is forbidden, a new development direction is explored, so that the method is beneficial to green sustainable development of the building industry, reduces the production cost, and has good economic and social benefits.
In the present invention, the plant ash is suitably 5 to 20 parts by weight;
wherein, the plant ash can be prepared by burning common waste plants, such as: rice hull ash, highland barley straw ash, rape straw ash, corn straw ash and other waste crops. Preferably at least one of rice hull ash, highland barley straw ash, rape straw ash and corn straw ash.
In the invention, the weight part of the wet carbonized red mud is 4-15 parts;
wherein the wet carbonized red mud comprises at least one of Bayer process red mud, sintering process red mud and series-parallel process red mud.
In the present invention, suitably, the weight part of the biomass-derived carbon dots is 0.1 to 5 parts;
wherein the biomass-derived carbon dots are obtained by hydrothermal extraction of at least one of green tea, licorice, ginger, waste phoenix tree leaf and litchi leaf. When the green tea, the liquorice, the ginger, the waste gas phoenix tree leaves and the litchi leaves are extracted by a hydrothermal method, the obtained extracting solution has good oxidation resistance.
In the present invention, suitably, the cement is present in an amount of 10 to 20 parts by weight;
in the present invention, suitably, the porous aggregate is 25 to 45 parts by weight;
in the invention, the reclaimed sand is suitably 20 to 40 parts by weight;
the reclaimed sand is obtained by the existing reclaiming process of the used natural sand, can be used as sand again to replace the natural sand to be doped into concrete, and has good economic and social benefits.
In the present invention, suitably, the water is present in an amount of 15 to 35 parts by weight;
in the present invention, suitably, the weight part of the admixture is 0.2 to 6 parts;
the additive comprises a water reducing agent, an air entraining agent, a defoaming agent and an early strength agent. The mass percentages of the water reducing agent, the air entraining agent, the defoaming agent and the early strength agent in the admixture are respectively 8-15wt%, 5-12wt%, 8-15wt% and 60-75wt%.
The water reducing agent comprises at least one of a naphthalene water reducing agent, a sodium lignosulfonate water reducing agent, an amino water reducing agent and a polycarboxylic acid water reducing agent.
The air entraining agent comprises at least one of rosin resin air entraining agent, alkyl air entraining agent and sulfonic acid air entraining agent.
The defoaming agent comprises at least one of a silicone defoaming agent, a polyether defoaming agent and a polyether modified polysiloxane defoaming agent.
The early strength agent comprises at least one of nitrite, calcium formate, a compound early strength agent and triethanolamine.
In the invention, the cement can be conventional common cement, such as: the cement is commercially available as ordinary portland cement, slag-based geopolymer cement, alkali-activated slag cement, sulphoaluminate cement, and the like.
In the present invention, the porous aggregate includes at least one of heavy titanium slag, blast furnace slag, steel slag, and recycled coarse aggregate.
In a second aspect, the invention also discloses a preparation method of the anti-erosion concrete, which comprises the following steps:
s1, drying and screening plant ash and wet-type carbonized red mud to obtain particles with the particle size of less than or equal to 0.075 mm; mainly removes particles with the particle size of more than 0.075mm, so that the volcanic ash performance of the plant ash is improved.
S2, mixing the porous aggregate and the reclaimed sand, adding the plant ash, the wet-type carbonized red mud and the cement, and uniformly stirring to obtain a mixture.
And S3, uniformly mixing the water and the biomass derived carbon dots, adding the mixture and the additive into the mixture, uniformly stirring, and then loading the mixture into a mold for molding and maintaining.
Before the porous aggregate and the reclaimed sand are mixed, partial water can be used for wetting the porous aggregate firstly, so that the concrete has an internal curing function, the interface transition area is improved, meanwhile, the binding power of the aggregate and the slurry is improved, and the strength of the concrete is improved.
Examples
Example 1
This example provides erosion resistant concrete having the composition shown in table 1.
Wherein: the plant ash is prepared by mixing rice hull ash, highland barley straw ash, rape straw ash and corn straw ash according to mass equal proportion.
The biomass-derived carbon dots are prepared from green tea, licorice, ginger, waste phoenix tree leaf and litchi leaf by the existing hot water method, and are not specifically described herein because they are existing.
TABLE 1
The embodiment also discloses a preparation method of the anti-corrosion concrete, which comprises the following steps:
(1) Before stirring, drying the plant ash and the wet-type carbonized red mud in the sun, dispersing the plant ash and the wet-type carbonized red mud which are solidified into blocks, and screening the dried plant ash and the wet-type carbonized red mud by a screen to remove particles with the size of more than 0.075 mm.
(2) Mixing and stirring the porous aggregate and the reclaimed sand in a stirring device for 50s; then adding the plant ash, the wet carbonized red mud and the cement into a stirring device, and stirring for 70s;
(3) Stirring and mixing water and biomass derived carbon dots uniformly, adding the mixture and an additive into a stirring device within 3s, and stirring for 5min;
(4) And after stirring is finished, pouring the stirred concrete out, carrying out workability test, loading materials in a layered manner, vibrating or tamping for forming, and curing to obtain the anti-erosion concrete.
Example 2
This example provides erosion resistant concrete having the composition shown in table 2.
The biomass-derived carbon dots are prepared from litchi leaves by the existing hot water method, and are not specifically described herein because they are existing.
TABLE 2
The embodiment also discloses a preparation method of the anti-corrosion concrete, which comprises the following steps:
(1) Before stirring, drying the plant ash and the wet-type carbonized red mud in the sun, dispersing the plant ash and the wet-type carbonized red mud which are solidified into blocks, and screening the dried plant ash and the wet-type carbonized red mud by a screen to remove particles with the size of more than 0.075 mm.
(2) In a stirring device, mixing and stirring the porous aggregate and the reclaimed sand for 60s; then adding the plant ash, the wet carbonized red mud and the cement into a stirring device, and stirring for 80s;
(3) Stirring and mixing water and biomass derived carbon dots uniformly, adding the mixture and an additive into a stirring device within 3s, and stirring for 7min;
(4) And after stirring is finished, pouring the stirred concrete out, carrying out workability test, loading materials in a layered mode, vibrating or inserting and tamping for forming, and curing to obtain the anti-erosion concrete.
Example 3
This example provides erosion resistant concrete having the composition shown in table 3.
The biomass-derived carbon dots are prepared from liquorice and litchi leaves by adopting the existing hot water method, and are not specifically described here because the existing method is adopted.
TABLE 3
The embodiment also discloses a preparation method of the anti-corrosion concrete, which comprises the following steps:
(1) Before stirring, drying the plant ash and the wet-type carbonized red mud in the sun, dispersing the plant ash and the wet-type carbonized red mud which are solidified into blocks, and screening the dried plant ash and the wet-type carbonized red mud by a screen to remove particles with the size of more than 0.075 mm.
(2) In a stirring device, mixing and stirring the porous aggregate and the reclaimed sand for 50s; then adding plant ash, wet carbonized red mud and cement into a stirring device, and stirring for 70s;
(3) Stirring and mixing water and biomass derived carbon dots uniformly, adding the mixture and an additive into a stirring device within 3s, and stirring for 10min;
(4) And after stirring is finished, pouring the stirred concrete out, carrying out workability test, loading materials in a layered manner, vibrating or tamping for forming, and curing to obtain the anti-erosion concrete.
Example 4
This example provides erosion resistant concrete having the composition shown in table 4.
Biomass-derived carbon spots are produced from green tea using existing hot water processes, which are not specifically described herein because they are existing.
TABLE 4
The embodiment also discloses a preparation method of the anti-corrosion concrete, which comprises the following steps:
(1) Before stirring, drying the plant ash and the wet-type carbonized red mud in the sun, dispersing the plant ash and the wet-type carbonized red mud which are solidified into blocks, and screening the dried plant ash and the wet-type carbonized red mud by a screen to remove particles with the size of more than 0.075 mm.
(2) In a stirring device, mixing and stirring the porous aggregate and the reclaimed sand for 40s; then adding the plant ash, the wet carbonized red mud and the cement into a stirring device, and stirring for 80s;
(3) Stirring and mixing water and biomass derived carbon dots uniformly, adding the mixture and an additive into a stirring device within 3s, and stirring for 4min;
(4) And after stirring is finished, pouring the stirred concrete out, carrying out workability test, loading materials in a layered manner, vibrating or tamping for forming, and curing to obtain the anti-erosion concrete.
Example 5
This example provides erosion resistant concrete having the composition shown in table 5.
The biomass-derived carbon dots are prepared by mixing liquorice, ginger and waste gas of phoenix tree leaves and then adopting the existing hot water method, and are not specifically described here because of the existing method.
TABLE 5
The embodiment also discloses a preparation method of the anti-corrosion concrete, which comprises the following steps:
(1) Before stirring, drying the plant ash and the wet-type carbonized red mud in the sun, dispersing the plant ash and the wet-type carbonized red mud which are solidified into blocks, and screening the dried plant ash and the wet-type carbonized red mud by a screen to remove particles with the size of more than 0.075 mm.
(2) In a stirring device, mixing and stirring the porous aggregate and the reclaimed sand for 40s; then adding plant ash, wet carbonized red mud and cement into a stirring device, and stirring for 40s;
(3) Stirring and mixing water and biomass derived carbon dots uniformly, adding the mixture and an additive into a stirring device within 3s, and stirring for 8min;
(4) And after stirring is finished, pouring the stirred concrete out, carrying out workability test, loading materials in a layered mode, vibrating or inserting and tamping for forming, and curing to obtain the anti-erosion concrete.
Comparative example 1
This comparative example provides concrete whose composition is shown in table 6.
TABLE 6
The comparative example also discloses a preparation method of the concrete, which comprises the following steps:
(1) Mixing and stirring the crushed stone coarse aggregate, the fly ash and the natural sand in a stirring device for 40s; then adding the cement into a stirring device, and stirring for 40s;
(2) Adding water and the additive into a stirring device within 3s, and stirring for 8min;
(3) And after stirring is finished, pouring the stirred concrete out, carrying out workability test, loading materials in a layered mode, vibrating or inserting and tamping for forming, and curing to obtain the concrete.
Comparative example 2
This comparative example provides concrete having the composition shown in table 7.
TABLE 7
The comparative example also discloses a preparation method of the concrete, which comprises the following steps:
(1) Mixing and stirring the crushed stone coarse aggregate, the fly ash and the natural sand in a stirring device for 40s; then adding the cement into a stirring device, and stirring for 40s;
(2) Adding water, calcium nitrite and the additive into a stirring device within 3s, and stirring for 8min;
(3) And after stirring is finished, pouring the stirred concrete out, carrying out workability test, loading materials in a layered mode, vibrating or inserting and tamping for forming, and curing to obtain the concrete.
The concrete produced in examples 1 to 5 and comparative examples 1 to 2 were now subjected to the performance test, and the results are shown in Table 8.
TABLE 8
Wherein: slump and expansion are carried out according to GB/T50080 standard of test method for common concrete mixture performance, compressive strength is carried out according to GB/T50081 standard of test method for physical and mechanical properties of concrete, the pH value of a pore solution adopts a high-pressure extraction pore solution method, and corrosion inhibition efficiency adopts an electrochemical alternating-current impedance spectroscopy method.
As can be seen from Table 8, examples 1 to 5 are inferior in workability to comparative examples 1 to 2, but the compression resistance and the corrosion inhibition efficiency are superior to those of comparative examples 1-2. The reason is that the common crushed stone coarse aggregate and the natural sand adopted in the comparative examples 1 and 2 are aggregates, and the fly ash is used as a mineral admixture, so that the prepared anti-erosion concrete has better workability; in the embodiments 1-5, the porous aggregate, the regenerated sand, the machine-made sand, the plant ash and the wet-type carbonized red mud are used as mineral admixtures, and the machine-made sand or the regenerated sand is used for preparing the concrete, so that the concrete has the defects of high viscosity, reduced fluidity and poor workability due to high stone powder content, poor particle grading, loose and porous structure and easy absorption of a large amount of water in the machine-made sand and the regenerated sand; but the mechanical property and the anti-erosion capability of the prepared anti-erosion concrete are obviously superior to those of the comparative examples 1-2, because the plant ash and the wet-type carbonized red mud are used as mineral admixture, the characteristics of large specific surface area, good dispersibility and high alkali content are utilized, the extracted biomass is used as an organic corrosion inhibitor, the protective layer on the surface of the steel bar in the concrete is enhanced in a high-alkaline environment, the electrochemical corrosion on the surface of the steel bar is prevented, meanwhile, the porous aggregate is pre-wetted, and when the glue material is hydrated, part of water is released in the holes to play a role in promoting the hydration, the interface transition region is improved, and the bonding strength is increased.
pH tests are carried out on the pore solutions of concrete test pieces of comparative examples and examples, and it is found that the pH value of comparative example 1 without the corrosion inhibition material is lower than that of comparative example 1 with the corrosion inhibition material added, the pH value is only 7, the pH value of comparative example 2 with the corrosion inhibition material added is not lower than 10 with examples 2-5, and the pH value of the pore solution of example 1 is 9 because the mixing ratio is only 0.1 part of biomass-derived carbon dots, and the corrosion inhibition effect is weak.
In conclusion, the plant ash and the wet carbonized red mud are adopted in the anti-erosion concrete disclosed by the invention, so that the cement can be greatly reduced, and the anti-erosion concrete has a good corrosion inhibition effect; meanwhile, a large amount of agricultural solid waste, industrial solid waste and building solid waste can be consumed, the application of the green corrosion inhibitor is promoted, the traditional inorganic corrosion inhibitor which has larger harm is gradually replaced, and the purposes of reducing cost and protecting the environment are achieved.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The anti-erosion concrete is characterized by comprising the following components in parts by weight:
5-20 parts of plant ash, 4-15 parts of wet-type carbonized red mud, 0.1-5 parts of biomass-derived carbon dots, 10-20 parts of cement, 25-45 parts of porous aggregate, 20-40 parts of reclaimed sand, 0.2-6 parts of an additive and 15-35 parts of water.
2. The erosion resistant concrete of claim 1, wherein said plant ash comprises at least one of rice hull ash, barley straw ash, canola straw ash, and corn stover ash.
3. The erosion resistant concrete of claim 1, wherein the wet carbonized red mud comprises at least one of bayer process red mud, sintering process red mud, and mixed process red mud.
4. The erosion resistant concrete of claim 1, wherein the biomass-derived carbon dots are extracted from one or a combination of green tea, licorice, ginger, phoenix tree leaf, and lychee leaf.
5. The erosion resistant concrete of claim 1, wherein the admixture comprises the following components in parts by weight:
8-15wt% of water reducing agent, 5-12wt% of air entraining agent, 8-15wt% of defoaming agent and 60-75wt% of early strength agent.
6. The erosion resistant concrete of claim 5, wherein the water reducer comprises at least one of a naphthalene based water reducer, a sodium lignosulfonate water reducer, an amino water reducer, and a polycarboxylic acid water reducer.
7. The erosion resistant concrete of claim 5, wherein the air-entraining agent comprises at least one of a rosin resin based air-entraining agent, an alkyl based air-entraining agent, and a sulfonate acid based air-entraining agent; preferably, the defoaming agent comprises at least one of a silicone defoaming agent, a polyether defoaming agent and a polyether modified polysiloxane defoaming agent; preferably, the early strength agent comprises at least one of nitrite, calcium formate, a compound early strength agent and triethanolamine.
8. The erosion resistant concrete of claim 1, wherein the cement comprises at least one of commercially available portland cement, slag-based polymer cement, alkali-activated slag cement, and sulfoaluminate cement.
9. The erosion resistant concrete of claim 1, wherein the porous aggregate comprises at least one of heavy titanium slag, blast furnace slag, steel slag, and recycled coarse aggregate.
10. A method of producing the erosion resistant concrete of any one of claims 1-9, comprising:
drying and screening plant ash and wet carbonized red mud to obtain particles with the particle size of less than or equal to 0.075 mm;
mixing the porous aggregate and the reclaimed sand, adding the plant ash, the wet-type carbonized red mud and the cement, and uniformly stirring to obtain a mixture;
uniformly mixing water and biomass derived carbon dots, adding the mixture and an additive into the mixture, uniformly stirring, and then loading the mixture into a mold for molding and maintaining;
preferably, the porous aggregate is wetted with water before mixing the porous aggregate and the reclaimed sand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310011435.5A CN115974490A (en) | 2023-01-05 | 2023-01-05 | Anti-erosion concrete and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310011435.5A CN115974490A (en) | 2023-01-05 | 2023-01-05 | Anti-erosion concrete and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115974490A true CN115974490A (en) | 2023-04-18 |
Family
ID=85972149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310011435.5A Pending CN115974490A (en) | 2023-01-05 | 2023-01-05 | Anti-erosion concrete and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115974490A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111393083A (en) * | 2020-03-25 | 2020-07-10 | 山东省路桥集团有限公司 | Full-solid-waste high-performance concrete and preparation method and application thereof |
| CN114180903A (en) * | 2021-08-31 | 2022-03-15 | 华南农业大学 | Nano carbon dot modified concrete and preparation method thereof |
| CN114195419A (en) * | 2021-12-09 | 2022-03-18 | 深圳大学 | Carbon-based composition, cement-based composite material, and preparation method and application thereof |
-
2023
- 2023-01-05 CN CN202310011435.5A patent/CN115974490A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111393083A (en) * | 2020-03-25 | 2020-07-10 | 山东省路桥集团有限公司 | Full-solid-waste high-performance concrete and preparation method and application thereof |
| CN114180903A (en) * | 2021-08-31 | 2022-03-15 | 华南农业大学 | Nano carbon dot modified concrete and preparation method thereof |
| CN114195419A (en) * | 2021-12-09 | 2022-03-18 | 深圳大学 | Carbon-based composition, cement-based composite material, and preparation method and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Zeidabadi et al. | Synthesis, characterization and evaluation of biochar from agricultural waste biomass for use in building materials | |
| CN109574567B (en) | Anti-freezing recycled concrete and preparation method thereof | |
| CN103553454A (en) | High performance concrete with steel slag as admixture and aggregate and preparation method thereof | |
| CN108569859B (en) | Waterproof and impervious concrete additive with self-repairing function and preparation method thereof | |
| CN103803918A (en) | Porcelain powder waste mixed cement-based tiny-expansion crack repairing mortar and using method thereof | |
| CN110606713A (en) | High-strength light aggregate concrete and preparation process thereof | |
| CN113698164B (en) | Anti-cracking anti-settling road water-stabilizing layer material and preparation method thereof | |
| CN113213789B (en) | Paving brick prepared based on household garbage incineration fly ash and preparation method thereof | |
| CN108863133A (en) | A kind of efficient special fibre antimitotic agent and preparation method thereof | |
| CN104909679A (en) | Cement concrete pavement renewing material and preparation method thereof | |
| CN114368953A (en) | Low-carbon green ultra-high performance concrete and preparation method thereof | |
| CN113307595A (en) | Multi-element solid waste synergy-based geopolymer cementing material for pavement base and preparation method thereof | |
| CN114671633B (en) | Full-solid-waste clinker-free cementing material, conductive mortar and preparation method thereof | |
| CN110498630B (en) | Concrete composite additive, preparation method thereof and concrete | |
| CN111943583A (en) | Low-shrinkage high-crack-resistance high-durability long-life concrete and preparation method thereof | |
| CN115073093A (en) | Low-shrinkage high-strength self-compacting recycled concrete and preparation method thereof | |
| CN114634318A (en) | Solid waste cementing material, full-solid waste lightweight concrete and preparation method thereof | |
| CN111253126B (en) | Environment-friendly high-strength concrete and preparation method thereof | |
| CN108516741B (en) | Steel slag sand-straw ash composite doping mortar and preparation method thereof | |
| CN116835914A (en) | Recycled aggregate concrete and preparation method thereof | |
| CN115893912A (en) | Low-carbon geopolymer mortar repair material and preparation method thereof | |
| CN115925359A (en) | Coal gangue base polymer green filling material and preparation method thereof | |
| CN105384405A (en) | Method for preparing anti-freezing concrete | |
| CN115974490A (en) | Anti-erosion concrete and preparation method thereof | |
| CN115010428A (en) | Building 3D printing material, preparation method and application thereof, and product |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |