CN115231868B - Anti-cracking and anti-corrosion C30 concrete and preparation method thereof - Google Patents
Anti-cracking and anti-corrosion C30 concrete and preparation method thereof Download PDFInfo
- Publication number
- CN115231868B CN115231868B CN202210701859.XA CN202210701859A CN115231868B CN 115231868 B CN115231868 B CN 115231868B CN 202210701859 A CN202210701859 A CN 202210701859A CN 115231868 B CN115231868 B CN 115231868B
- Authority
- CN
- China
- Prior art keywords
- parts
- cracking
- corrosion
- plant fiber
- concrete
- 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.)
- Expired - Fee Related
Links
- 238000005336 cracking Methods 0.000 title claims abstract description 92
- 238000005260 corrosion Methods 0.000 title claims abstract description 91
- 238000002360 preparation method Methods 0.000 title claims abstract description 57
- 239000000835 fiber Substances 0.000 claims abstract description 167
- 239000003112 inhibitor Substances 0.000 claims abstract description 61
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims abstract description 60
- 229920000642 polymer Polymers 0.000 claims abstract description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000000243 solution Substances 0.000 claims abstract description 28
- 239000007864 aqueous solution Substances 0.000 claims abstract description 26
- 238000001035 drying Methods 0.000 claims abstract description 20
- 239000000843 powder Substances 0.000 claims abstract description 20
- 239000002253 acid Substances 0.000 claims abstract description 11
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 11
- 239000010881 fly ash Substances 0.000 claims abstract description 11
- 238000005507 spraying Methods 0.000 claims abstract description 10
- 238000003763 carbonization Methods 0.000 claims abstract description 9
- 239000004568 cement Substances 0.000 claims abstract description 9
- 239000011248 coating agent Substances 0.000 claims abstract description 9
- 238000000576 coating method Methods 0.000 claims abstract description 9
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 9
- 239000011707 mineral Substances 0.000 claims abstract description 9
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 6
- 239000010703 silicon Substances 0.000 claims abstract description 6
- 241000196324 Embryophyta Species 0.000 claims description 139
- 239000012528 membrane Substances 0.000 claims description 28
- 238000013268 sustained release Methods 0.000 claims description 28
- 239000012730 sustained-release form Substances 0.000 claims description 28
- 229920000747 poly(lactic acid) Polymers 0.000 claims description 22
- 239000004626 polylactic acid Substances 0.000 claims description 22
- 229920002689 polyvinyl acetate Polymers 0.000 claims description 21
- 239000011118 polyvinyl acetate Substances 0.000 claims description 21
- RAFRTSDUWORDLA-UHFFFAOYSA-N phenyl 3-chloropropanoate Chemical compound ClCCC(=O)OC1=CC=CC=C1 RAFRTSDUWORDLA-UHFFFAOYSA-N 0.000 claims description 20
- 239000002994 raw material Substances 0.000 claims description 19
- 238000002156 mixing Methods 0.000 claims description 17
- 240000008042 Zea mays Species 0.000 claims description 16
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 claims description 16
- 235000002017 Zea mays subsp mays Nutrition 0.000 claims description 16
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 16
- 235000005822 corn Nutrition 0.000 claims description 16
- 229910052760 oxygen Inorganic materials 0.000 claims description 16
- 239000001301 oxygen Substances 0.000 claims description 16
- 239000002202 Polyethylene glycol Substances 0.000 claims description 15
- 239000007822 coupling agent Substances 0.000 claims description 15
- 229920001223 polyethylene glycol Polymers 0.000 claims description 15
- 238000001816 cooling Methods 0.000 claims description 13
- 239000003960 organic solvent Substances 0.000 claims description 13
- 239000010445 mica Substances 0.000 claims description 11
- 229910052618 mica group Inorganic materials 0.000 claims description 11
- 238000001694 spray drying Methods 0.000 claims description 10
- 239000000654 additive Substances 0.000 claims description 9
- 230000000996 additive effect Effects 0.000 claims description 9
- -1 polybutylene succinate Polymers 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 8
- 229920002961 polybutylene succinate Polymers 0.000 claims description 8
- 239000004631 polybutylene succinate Substances 0.000 claims description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 239000011812 mixed powder Substances 0.000 claims description 6
- 238000012986 modification Methods 0.000 claims description 6
- 230000004048 modification Effects 0.000 claims description 6
- 238000010298 pulverizing process Methods 0.000 claims description 4
- 238000007873 sieving Methods 0.000 claims description 4
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 claims description 3
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 claims description 3
- 240000006394 Sorghum bicolor Species 0.000 claims description 3
- 235000011684 Sorghum saccharatum Nutrition 0.000 claims description 3
- 235000012538 ammonium bicarbonate Nutrition 0.000 claims description 3
- 239000001099 ammonium carbonate Substances 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 239000001488 sodium phosphate Substances 0.000 claims description 3
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 claims description 3
- 229910000406 trisodium phosphate Inorganic materials 0.000 claims description 3
- 235000019801 trisodium phosphate Nutrition 0.000 claims description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 abstract description 35
- 230000000694 effects Effects 0.000 abstract description 14
- 230000002265 prevention Effects 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 34
- 238000009792 diffusion process Methods 0.000 description 16
- 230000007797 corrosion Effects 0.000 description 12
- 238000012360 testing method Methods 0.000 description 12
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 9
- 239000000463 material Substances 0.000 description 9
- ZMKVBUOZONDYBW-UHFFFAOYSA-N 1,6-dioxecane-2,5-dione Chemical compound O=C1CCC(=O)OCCCCO1 ZMKVBUOZONDYBW-UHFFFAOYSA-N 0.000 description 8
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 6
- 238000010000 carbonizing Methods 0.000 description 4
- 238000005536 corrosion prevention Methods 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 238000012216 screening Methods 0.000 description 4
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 3
- 239000012046 mixed solvent Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 206010034133 Pathogen resistance Diseases 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229920005610 lignin Polymers 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 239000003513 alkali Substances 0.000 description 1
- 239000002969 artificial stone Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000006056 electrooxidation reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000000543 intermediate Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000007655 standard test method Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/10—Coating or impregnating
- C04B20/1018—Coating or impregnating with organic materials
- C04B20/1029—Macromolecular compounds
- C04B20/1037—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/60—Agents for protection against chemical, physical or biological attack
- C04B2103/61—Corrosion inhibitors
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/24—Sea water resistance
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant materials
-
- 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
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The application relates to the technical field of concrete, and particularly discloses anti-cracking and anti-corrosion C30 concrete and a preparation method thereof, wherein the anti-cracking and anti-corrosion C30 concrete comprises the following components in parts by weight: 320-350 parts of cement; 900-1000 parts of coarse aggregate; 700-800 parts of fine aggregate; 70-80 parts of fly ash; 4-8 parts of silicon micropowder; 6-9 parts of mineral powder; 4-6 parts of a polycarboxylic acid water reducing agent; 160-180 parts of water; 10-20 parts of modified anti-cracking anti-corrosion plant fiber; the preparation method of the modified anti-cracking and anti-corrosion plant fiber comprises the following steps: preparing plant fibers, and carrying out semi-carbonization treatment on the plant fibers to obtain semi-carbonized plant fibers; modifying, namely uniformly spraying an inorganic rust inhibitor aqueous solution on the surface of the semi-carbonized plant fiber, and drying to obtain modified plant fiber; and (3) coating, namely uniformly spraying the polymer slow-release film solution on the surface of the modified plant fiber, and drying to obtain the modified anti-cracking anticorrosive plant fiber. The anti-cracking and anti-corrosion C30 concrete has the advantages of good anti-cracking performance, prevention of chloride ion permeation and enhancement of anti-corrosion effect.
Description
Technical Field
The invention relates to the technical field of concrete, in particular to anti-cracking and anti-corrosion C30 concrete and a preparation method thereof.
Background
Concrete is one of the most important civil engineering materials in the present generation, and is an artificial stone prepared from a cementing material, granular aggregate (also called aggregate), water, and optionally an additive and an admixture according to a certain proportion, uniformly stirring, vibrating and molding, and curing under a certain condition.
When the concrete is applied to areas such as coastal salinized areas, inland salt lake areas and the like, the content of chloride ions in soil of the areas is high, the chloride ions can penetrate or activate an oxide protective film on the surface of a reinforcing steel bar under the conditions, so that electrochemical corrosion conditions are created, the chloride ions penetrate or activate the oxide protective film, electrode potentials of all parts of the reinforcing steel bar are different to form local batteries, once the corrosion effect of the chloride ions on the reinforcing steel bar occurs, the corrosion effect can be continuously carried out, therefore, the harmfulness of the corrosion-resistant concrete is quite great, and in order to solve the problem of concrete corrosion of infrastructure such as buildings, construction structures, road bridges and the like in strong saline-alkali and salt lake areas, technical personnel research and develop the corrosion-resistant concrete.
The related art discloses an anticorrosive concrete, which comprises the following components: the corrosion resistance of the concrete is improved by adding materials such as the fly ash, the air entraining agent, the expanding agent and the like into the common concrete.
In view of the above-mentioned related art, the inventors believe that although the materials such as fly ash can play a certain role in preventing corrosion in the early stage, as the service life of the concrete is prolonged, chloride ions continuously migrate into the concrete, and the corrosion prevention effect gradually decreases.
Disclosure of Invention
In order to enhance the anticorrosion effect of concrete, the application provides anti-cracking anticorrosion C30 concrete and a preparation method thereof.
In a first aspect, the application provides an anti-cracking and anti-corrosion C30 concrete, which adopts the following technical scheme:
the anti-cracking and anti-corrosion C30 concrete comprises the following raw materials in parts by weight:
320-350 parts of cement;
900-1000 parts of coarse aggregate;
700-800 parts of fine aggregate;
70-80 parts of fly ash;
4-8 parts of silicon micropowder;
6-9 parts of mineral powder;
4-6 parts of a polycarboxylic acid water reducing agent;
160-180 parts of water;
10-20 parts of modified anti-cracking anti-corrosion plant fiber;
the preparation method of the modified anti-cracking and anti-corrosion plant fiber comprises the following steps:
preparing plant fibers, and carrying out semi-carbonization treatment on the plant fibers to obtain semi-carbonized plant fibers;
performing modification treatment, namely dissolving an inorganic rust inhibitor in water to prepare an inorganic rust inhibitor aqueous solution, uniformly spraying the inorganic rust inhibitor aqueous solution on the surface of the semi-carbonized plant fiber, and drying to obtain modified plant fiber;
and (3) coating, namely preparing a polymer slow-release film solution, uniformly spraying the polymer slow-release film solution on the surface of the modified plant fiber, and drying to obtain the modified anti-cracking anticorrosive plant fiber.
By adopting the technical scheme, the plant fiber is subjected to semi-carbonization treatment, the obtained semi-carbonized plant fiber is not carbonized inside, but the surface is carbonized to form a carbonized layer with a porous structure; on one hand, the semi-carbonized plant fibers still have certain toughness because the interior of the semi-carbonized plant fibers is not carbonized, and a large amount of modified anti-cracking and anti-corrosion plant fibers form a three-dimensional network structure in concrete, so that the anti-cracking performance of the concrete is enhanced, the probability of chloride ions permeating into the concrete is reduced, and the anti-corrosion effect is enhanced; on the other hand, the carbonized layer on the surface of the semi-carbonized plant fiber can adsorb an inorganic rust inhibitor aqueous solution, after drying, the inorganic rust inhibitor is loaded on micropores inside the carbonized layer and the surface of the carbonized layer, when water containing chloride ions permeates into the concrete, the inorganic rust inhibitor is slowly dissolved in the water, the carbonized layer can control the inorganic rust inhibitor to be slowly released, the inorganic rust inhibitor can delay the time for the reinforcement bars in the concrete to rust, the corrosion development speed of the reinforcement bars is slowed down, and the corrosion prevention effect is further enhanced; in the coating treatment step, a layer of polymer slow-release film is coated on the periphery of the carbonization layer on the surface of the semi-carbonized plant fiber, on one hand, the polymer slow-release film can reduce the loss of the carbonization layer caused by abrasion when being doped into concrete, and reduce the loss of the inorganic rust inhibitor, and on the other hand, the polymer slow-release film has a slow-release effect, can further reduce the release rate of the inorganic rust inhibitor, and reduces the waste caused by the release of the inorganic rust inhibitor when meeting water.
Optionally, the plant fiber is corn stalk fiber or sorghum stalk fiber.
By adopting the technical scheme, the plant fiber lignin has low proportion, the cellulose has high proportion and good toughness, and crop straws can be utilized to change waste into valuable, so that the plant fiber lignin is green and environment-friendly and has low cost.
Optionally, the length of the plant fiber is 2-5mm, and the diameter is 60-80 μm.
By adopting the technical scheme, the plant fibers with the length and the diameter range are added into the concrete, so that the anti-cracking performance and the mechanical property of the concrete can be improved.
Optionally, the semi-carbonization treatment comprises the following steps: drying, pulverizing, sieving, placing in a sealed environment with oxygen content of 1.5-2%, heating to 300-315 deg.C, holding the temperature for 15-20min, and cooling to obtain semi-carbonized plant fiber.
By adopting the technical scheme, the oxygen content is controlled to be 1.5-2%, the temperature is controlled to be 300-315 ℃, the temperature is lower than the ignition point of the plant fiber, the probability of burning of the plant fiber is reduced, and the plant fiber can form semi-carbonized plant fiber.
Optionally, the inorganic rust inhibitor is selected from one or more of calcium nitrite, trisodium phosphate and ammonium bicarbonate.
By adopting the technical scheme, the inorganic rust inhibitor can be dissolved in water, has high solubility in water, and is convenient to load on a carbonization layer of semi-carbonized plant fibers.
Optionally, the concentration of the inorganic rust inhibitor aqueous solution is 100-120g/L.
By adopting the technical scheme, the concentration of the aqueous solution of the inorganic rust inhibitor is controlled within the range, so that the inorganic rust inhibitor can be fully dissolved, and the requirement of concrete on the using amount of the inorganic rust inhibitor can be met.
Optionally, the raw materials of the polymer sustained-release membrane comprise the following components in parts by weight:
20-40 parts of polyvinyl acetate;
10-15 parts of polylactic acid;
5-10 parts of polyethylene glycol;
2-4 parts of a coupling agent;
6-8 parts of polybutylene succinate;
1-1.5kg of mica powder;
40-60 parts of organic solvent.
By adopting the technical scheme, the polyvinyl acetate has better toughness and adhesiveness and is used as a main film forming material; the polylactic acid is used as an auxiliary film forming material, has certain bacterial resistance, can be biodegraded, and is green and environment-friendly; the polyethylene glycol is matched with polyvinyl acetate and polylactic acid to form a film, so that the release rate of the slow release film can be regulated and controlled; the poly (butylene succinate) plays a toughening role and improves the defect of poor mechanical property of the polylactic acid; mica powder is used as a filler, so that the wear resistance of the polymer sustained-release film can be improved; the coupling agent plays a role in promoting the cross-linking reaction of all the components to form the polymer sustained-release membrane.
Optionally, the coating treatment specifically comprises: uniformly mixing polyvinyl acetate, polylactic acid, polyethylene glycol, a coupling agent, polybutylene succinate, mica powder and an organic solvent to obtain a polymer sustained-release membrane solution; and (3) carrying out spray drying on the polymer slow-release film solution and the modified plant fiber, wherein the inlet temperature is 160-170 ℃, the outlet temperature is 105-110 ℃, and the air flow rate is 30-40L/min, and cooling to obtain the modified anti-cracking anticorrosive plant fiber.
By adopting the technical scheme and adopting the spray drying process, the polymer sustained-release membrane solution can be fully adhered to the surface of the modified plant fiber to form a complete polymer sustained-release membrane.
In a second aspect, the application provides a preparation method of anti-cracking and anti-corrosion C30 concrete, which adopts the following technical scheme:
the preparation method of the anti-cracking and anti-corrosion C30 concrete comprises the following steps:
step one, taking cement, fly ash, silica micropowder and mineral powder, and uniformly mixing to obtain first mixed powder;
step two, taking the coarse aggregate and the fine aggregate, and uniformly mixing to obtain a second mixed aggregate;
step three, taking a polycarboxylic acid water reducing agent and water, and uniformly mixing to obtain an additive solution;
and step four, uniformly mixing the first mixed powder, the second mixed aggregate, the additive solution and the modified anti-cracking and anti-corrosion plant fiber to obtain the anti-cracking and anti-corrosion C30 concrete.
By adopting the technical scheme, the modified anti-cracking and anti-corrosion plant fiber is added in the last step, the stirring time of the modified anti-cracking and anti-corrosion plant fiber is properly reduced, the abrasion between the modified anti-cracking and anti-corrosion plant fiber and the second mixed aggregate is reduced, the anti-cracking performance of the concrete is enhanced, the probability of chloride ions permeating into the concrete is reduced, and the anti-corrosion effect is enhanced.
In summary, the present application has the following beneficial effects:
1. because the modified anti-cracking and anti-corrosion plant fibers are added into the concrete, firstly, the semi-carbonized plant fibers still have certain toughness because the interior of the semi-carbonized plant fibers is not carbonized, and a large amount of modified anti-cracking and anti-corrosion plant fibers form a three-dimensional network structure in the concrete, so that the anti-cracking performance of the concrete is enhanced, the probability of chloride ions permeating into the concrete is reduced, and the anti-corrosion effect is enhanced; secondly, the carbonized layer on the surface of the semi-carbonized plant fiber can adsorb an inorganic rust inhibitor aqueous solution, after drying, the inorganic rust inhibitor is loaded on micropores inside the carbonized layer and the surface of the carbonized layer, when water containing chloride ions permeates into the concrete, the inorganic rust inhibitor is slowly dissolved in the water, the carbonized layer can control the inorganic rust inhibitor to be slowly released, the inorganic rust inhibitor can delay the time that the steel bar in the concrete begins to rust, the corrosion development speed of the steel bar is slowed down, and the corrosion prevention effect is further enhanced; the polymer slow-release film can reduce the loss of the carbonized layer caused by abrasion when being doped into concrete, reduce the loss of the inorganic rust inhibitor, has a slow-release effect, can further reduce the release rate of the inorganic rust inhibitor, and reduces the waste caused by the release of the inorganic rust inhibitor in a large amount when meeting water.
2. The polyvinyl acetate has better toughness and adhesiveness, and is used as a main film forming material; the polylactic acid is used as an auxiliary film forming material, has certain bacterial resistance, can be biodegraded, and is green and environment-friendly; the polyethylene glycol is matched with polyvinyl acetate and polylactic acid to form a film, so that the release rate of the slow release film can be regulated and controlled; the poly (butylene succinate) plays a toughening role and improves the defect of poor mechanical property of the polylactic acid; the coupling agent plays a role in promoting the cross-linking reaction of all the components to form the polymer sustained-release membrane.
3. In the application, a spray drying process is preferably adopted, so that the polymer sustained-release membrane solution can be fully adhered to the surface of the modified plant fiber to form a complete polymer sustained-release membrane.
Detailed Description
The present application will be described in further detail with reference to examples.
Examples of preparation of raw materials and/or intermediates
Preparation example 1
The preparation method of the modified anti-cracking and anti-corrosion plant fiber comprises the following steps:
preparing plant fiber, and semi-carbonizing: drying, crushing and screening 20kg of plant fiber, wherein the plant fiber is corn stalk fiber to obtain corn stalk fiber with the length of 2mm and the diameter of 60 mu m, placing the corn stalk fiber in a closed environment with the oxygen content of 1.5%, heating to 300 ℃, keeping the temperature for 20min, and cooling to obtain semi-carbonized plant fiber;
modifying, namely dissolving an inorganic rust inhibitor into water to prepare an inorganic rust inhibitor aqueous solution, wherein the inorganic rust inhibitor is trisodium phosphate, the concentration of the inorganic rust inhibitor aqueous solution is 100g/L, uniformly spraying 51L of the inorganic rust inhibitor aqueous solution to the surface of 10kg of semi-carbonized plant fibers, and drying to obtain modified plant fibers;
coating treatment, namely preparing a polymer sustained-release membrane solution, wherein the raw materials of the polymer sustained-release membrane comprise the following components in parts by weight: 20kg of polyvinyl acetate; 15kg of polylactic acid; 10kg of polyethylene glycol; 2kg of coupling agent, wherein the coupling agent is distearoyl isopropyl aluminate; 6kg of poly (butylene succinate); 1kg of mica powder; 40kg of organic solvent, wherein the organic solvent is a mixed solvent consisting of N, N-dimethylformamide and acetone according to a volume ratio of 1:1, polyvinyl acetate is purchased from Shanghai canal materials science and technology Limited, and is of a brand of N100, and polybutylene succinate is purchased from Dongguan global environmental protection science and technology Limited, and is of a brand of 803S; uniformly mixing polyvinyl acetate, polylactic acid, polyethylene glycol, a coupling agent, polybutylene succinate, mica powder and an organic solvent to obtain a polymer sustained-release membrane solution; and (3) carrying out spray drying on the polymer slow-release film solution and the modified plant fiber, wherein the inlet temperature is 160 ℃, the outlet temperature is 105 ℃ and the air flow rate is 30L/min during spray drying, and cooling to obtain the modified anti-cracking anticorrosive plant fiber.
Preparation example 2
The modified anti-cracking and anti-corrosion plant fiber is different from the preparation example 1 in that the preparation method comprises the following steps:
preparing plant fiber, and semi-carbonizing: drying, crushing and screening 20kg of plant fiber, wherein the plant fiber is corn stalk fiber to obtain corn stalk fiber with the length of 4mm and the diameter of 70 mu m, placing the corn stalk fiber in a closed environment with the oxygen content of 1.5%, heating to 310 ℃, keeping the temperature for 18min, and cooling to obtain semi-carbonized plant fiber;
performing modification treatment, namely dissolving an inorganic rust inhibitor in water to prepare an inorganic rust inhibitor aqueous solution, wherein the inorganic rust inhibitor is calcium nitrite, the concentration of the inorganic rust inhibitor aqueous solution is 100g/L, uniformly spraying 50L of the inorganic rust inhibitor aqueous solution on the surface of 10kg of semi-carbonized plant fibers, and drying to obtain modified plant fibers;
coating treatment, namely preparing a polymer sustained-release membrane solution, wherein the raw materials of the polymer sustained-release membrane comprise the following components in parts by weight: 30kg of polyvinyl acetate; 12kg of polylactic acid; 8kg of polyethylene glycol; 3kg of coupling agent, wherein the coupling agent is distearoyl-oxy isopropyl aluminate; 7kg of poly (butylene succinate); 1.2kg of mica powder; 50kg of organic solvent, wherein the organic solvent is a mixed solvent consisting of N, N-dimethylformamide and acetone according to a volume ratio of 1:1, and polyvinyl acetate, polylactic acid, polyethylene glycol, a coupling agent, polybutylene succinate, mica powder and the organic solvent are uniformly mixed to obtain a polymer sustained-release membrane solution; and (3) carrying out spray drying on the polymer sustained-release membrane solution and the modified plant fiber, wherein the inlet temperature is 165 ℃, the outlet temperature is 108 ℃ and the air flow rate is 35L/min during spray drying, and cooling to obtain the modified anti-cracking anticorrosive plant fiber.
Preparation example 3
The modified anti-cracking and anti-corrosion plant fiber is different from the preparation example 1 in that the preparation method comprises the following steps:
preparing plant fiber, and semi-carbonizing: drying 20kg of plant fiber, pulverizing, sieving to obtain corn stalk fiber with length of 5mm and diameter of 80 μm, placing in a sealed environment with oxygen content of 1.5%, heating to 315 deg.C, holding for 15min, and cooling to obtain semi-carbonized plant fiber;
performing modification treatment, namely dissolving an inorganic rust inhibitor into water to prepare an inorganic rust inhibitor aqueous solution, wherein the inorganic rust inhibitor is ammonium bicarbonate, the concentration of the inorganic rust inhibitor aqueous solution is 100g/L, uniformly spraying 49L of the inorganic rust inhibitor aqueous solution on the surface of 10kg of semi-carbonized plant fibers, and drying to obtain modified plant fibers;
coating treatment, namely preparing a polymer sustained-release membrane solution, wherein the raw materials of the polymer sustained-release membrane comprise the following components in parts by weight: 40kg of polyvinyl acetate; 10kg of polylactic acid; 5kg of polyethylene glycol; 4kg of coupling agent, wherein the coupling agent is distearoyl-oxy isopropyl aluminate; 8kg of poly (butylene succinate); 1.5kg of mica powder; 60kg of organic solvent, wherein the organic solvent is a mixed solvent consisting of N, N-dimethylformamide and acetone according to a volume ratio of 1:1, and polyvinyl acetate, polylactic acid, polyethylene glycol, a coupling agent, polybutylene succinate, mica powder and the organic solvent are uniformly mixed to obtain a polymer sustained-release membrane solution; and (3) carrying out spray drying on the polymer slow-release film solution and the modified plant fiber, wherein the inlet temperature is 170 ℃, the outlet temperature is 110 ℃ and the air flow rate is 40L/min during spray drying, and cooling to obtain the modified anti-cracking anticorrosive plant fiber.
Preparation example 4
The modified anti-cracking and anti-corrosion plant fiber is different from the preparation example 2 in that the plant fiber is sorghum stalk fiber.
Preparation example 5
The modified anti-cracking and anti-corrosion plant fiber is different from the preparation example 2 in that the oxygen content in a closed environment is 1.2 percent.
Preparation example 6
The modified anti-cracking and anti-corrosion plant fiber is different from the preparation example 2 in that the oxygen content in the closed environment is 1.8 percent.
Preparation example 7
The modified anti-cracking and anti-corrosion plant fiber is different from the preparation example 2 in that the oxygen content in the closed environment is 2 percent.
Preparation example 8
The modified anti-cracking and anti-corrosion plant fiber is different from the preparation example 2 in that the oxygen content in a closed environment is 2.5 percent.
Preparation example 9
The modified anti-cracking and anti-corrosion plant fiber is different from the preparation example 6 in that the concentration of the inorganic rust inhibitor aqueous solution is 110g/L.
Preparation example 10
The modified anti-cracking and anti-corrosion plant fiber is different from the preparation example 6 in that the concentration of the inorganic rust inhibitor aqueous solution is 120g/L.
Preparation example 11
The modified anti-cracking and anti-corrosion plant fiber is different from the plant fiber prepared in preparation example 9 in that polyethylene glycol in the raw materials of the polymer sustained-release membrane is replaced by polylactic acid with equal weight.
Preparation example 12
The modified anti-cracking and anti-corrosion plant fiber is different from the plant fiber prepared in preparation example 9 in that the poly (butylene succinate) in the raw material of the polymer slow-release film is replaced by polyvinyl acetate with equal weight.
Preparation example 13
The modified anti-cracking and anti-corrosion plant fiber is different from the preparation example 9 in that the raw materials of the polymer slow-release film comprise: the weight of polyvinyl acetate is 12kg; the weight of polylactic acid was 30kg.
Comparative preparation example 1
The preparation method of the modified anti-cracking and anti-corrosion plant fiber comprises the following steps:
preparing plant fiber, and semi-carbonizing: drying, crushing and screening 20kg of plant fiber, wherein the plant fiber is corn stalk fiber to obtain corn stalk fiber with the length of 4mm and the diameter of 70 mu m, placing the corn stalk fiber in a closed environment with the oxygen content of 1.5%, heating to 310 ℃, keeping the temperature for 18min, and cooling to obtain semi-carbonized plant fiber;
and (2) performing modification treatment, namely dissolving an inorganic rust inhibitor into water to prepare an inorganic rust inhibitor aqueous solution, wherein the inorganic rust inhibitor is calcium nitrite, the concentration of the inorganic rust inhibitor aqueous solution is 100g/L, uniformly spraying 50L of the inorganic rust inhibitor aqueous solution onto the surface of 10kg of semi-carbonized plant fiber, and drying to obtain the modified anti-crack anticorrosive plant fiber.
Examples
Example 1
The anti-cracking and anti-corrosion C30 concrete comprises the following raw materials in parts by weight:
320kg of cement;
900kg of coarse aggregate, wherein the coarse aggregate is broken stone;
800kg of fine aggregate, wherein the fine aggregate is fine sand;
70kg of fly ash;
8kg of silicon micropowder;
6kg of mineral powder;
4kg of polycarboxylic acid water reducing agent;
160kg of water;
10kg of modified anti-cracking anticorrosive plant fiber, wherein the modified anti-cracking anticorrosive plant fiber is prepared by the preparation example 1;
the preparation method of the anti-cracking and anti-corrosion C30 concrete comprises the following steps:
step one, taking cement, fly ash, silica micropowder and mineral powder, and uniformly mixing to obtain first mixed powder;
step two, taking the coarse aggregate and the fine aggregate, and uniformly mixing to obtain a second mixed aggregate;
step three, uniformly mixing a polycarboxylic acid water reducing agent and water to obtain an additive solution;
and step four, uniformly mixing the first mixed powder, the second mixed aggregate, the additive solution and the modified anti-cracking and anti-corrosion plant fiber to obtain the anti-cracking and anti-corrosion C30 concrete.
Example 2
The anti-cracking and anti-corrosion C30 concrete is different from the concrete in example 1 in that the raw materials comprise the following components in parts by weight:
335kg of cement;
950kg of coarse aggregate;
750kg of fine aggregate;
75kg of fly ash;
6kg of silicon micropowder;
8kg of mineral powder;
5kg of polycarboxylic acid water reducing agent;
170kg of water;
15kg of modified anti-cracking and anti-corrosion plant fiber, and the modified anti-cracking and anti-corrosion plant fiber is prepared by the preparation example 2.
Example 3
The anti-cracking and anti-corrosion C30 concrete is different from the concrete in example 1 in that the raw materials comprise the following components in parts by weight:
350kg of cement;
1000kg of coarse aggregate;
700kg of fine aggregate;
80kg of fly ash;
4kg of silicon micropowder;
9kg of mineral powder;
6kg of polycarboxylic acid water reducing agent;
180kg of water;
20kg of modified anti-cracking anticorrosive plant fiber, and the modified anti-cracking anticorrosive plant fiber is prepared by the preparation example 3.
Examples 4 to 13
The difference between the anti-cracking and anti-corrosion C30 concrete and the concrete in the embodiment 2 is that modified anti-cracking and anti-corrosion plant fibers are prepared in the preparation examples 4-13 in sequence.
Comparative example
Comparative example 1
An anti-crack and anti-corrosion C30 concrete is different from that of example 2 in that modified anti-crack and anti-corrosion plant fibers are prepared according to comparative preparation example 1.
Comparative example 2
The difference between the anti-cracking and anti-corrosion C30 concrete and the concrete in the embodiment 2 is that modified anti-cracking and anti-corrosion plant fibers are replaced by semi-carbonized plant fibers with equal weight, and the preparation method of the semi-carbonized plant fibers comprises the following steps: drying, crushing and screening 20kg of plant fiber, wherein the plant fiber is corn stalk fiber to obtain corn stalk fiber with the length of 4mm and the diameter of 70 mu m, placing the corn stalk fiber in a closed environment with the oxygen content of 1.5%, heating to 310 ℃, keeping the temperature for 18min, and cooling to obtain semi-carbonized plant fiber; the raw material of the anti-cracking and anti-corrosion C30 concrete also comprises 5kg of calcium nitrite; the concrete preparation method comprises the following steps: and uniformly mixing the polycarboxylic acid water reducing agent, the calcium nitrite and the water to obtain the additive solution.
Comparative example 3
The difference between the anti-cracking and anti-corrosion C30 concrete and the embodiment 2 is that modified anti-cracking and anti-corrosion plant fibers are not added, and the raw material of the anti-cracking and anti-corrosion C30 concrete also comprises 5kg of calcium nitrite; the preparation method of the concrete comprises the following steps: and uniformly mixing the polycarboxylic acid water reducing agent, the calcium nitrite and the water to obtain the additive solution.
Comparative example 4
The difference between the anti-cracking and anti-corrosion C30 concrete and the concrete in the embodiment 2 is that modified anti-cracking and anti-corrosion plant fibers are replaced by semi-carbonized plant fibers with equal weight, and the preparation method of the semi-carbonized plant fibers comprises the following steps: drying 20kg of plant fiber, pulverizing, sieving to obtain corn stalk fiber with length of 4mm and diameter of 70 μm, placing in a sealed environment with oxygen content of 1.5%, heating to 310 deg.C, holding for 18min, and cooling to obtain semi-carbonized plant fiber.
Comparative example 5
The difference between the anti-cracking and anti-corrosion C30 concrete and the concrete in the embodiment 2 is that modified anti-cracking and anti-corrosion plant fibers are not added.
Performance test
The detection method comprises the following steps:
(1) Diffusion coefficient of chloride ion: the test was carried out according to the 7.1 rapid chloride ion migration coefficient method in GB/T50082-2009 Standard test methods for Long-term Performance and durability of ordinary concrete, and the chloride ion diffusion coefficient of the concrete 28d in examples 1-13 and comparative examples 1-5 was tested.
(2) Calcium nitrite release rate test: taking the modified anti-cracking and anti-corrosion plant fibers in the preparation examples 2, 4 and 11-13, taking one part of each preparation example, wherein the weight of each part is 150g (containing 50g of calcium nitrite), soaking each part of the modified anti-cracking and anti-corrosion plant fibers in 300g of pure water, sealing, keeping the water temperature at 25 ℃, taking out the modified anti-cracking and anti-corrosion plant fibers after soaking for 7 days, testing the concentration of calcium nitrite in the water solution, calculating the mass M1 of the calcium nitrite, calculating the release rate of the calcium nitrite = M1/50 x 100%, carrying out parallel tests for three times, and taking the average value of the three tests as the release rate of the calcium nitrite; the method (2) was repeated to test the release rates of calcium nitrite for 7 days, 30 days and 90 days for preparation example 2, preparation example 4 and preparation examples 11 to 13 in this order.
(3) And (3) testing the crack resistance: according to GB/T50081-2016 standard of mechanical property test method for common concrete, examples 1, 4-8 and comparative examples 4-5 are made into standard test blocks, and after concrete is poured for 28 days, the total crack area of cracks on the standard test blocks is measured.
(4) Compressive strength: the compressive strength of the concrete of examples 1-13 was tested according to GB/T50081-2019 "test method Standard for physical and mechanical Properties of concrete", and the results showed that: the compressive strength of examples 1-13 all met the requirements of C30 concrete.
TABLE 1 chloride ion diffusion coefficient test results
Table 2 results of calcium nitrite release rate test
TABLE 3 Total crack area test results
| Example/comparative example numbering | 28d Total cracking area/mm 2 |
| Example 2 | 155.1 |
| Example 4 | 156.4 |
| Example 5 | 154.8 |
| Example 6 | 154.2 |
| Example 7 | 153.5 |
| Example 8 | 186.8 |
| Comparative example 4 | 198.5 |
| Comparative example 5 | 308.2 |
As can be seen by combining examples 1-13 and comparative examples 1-5 with tables 1-2, comparative example 5 has the greatest diffusion coefficient of chloride ions and the worst performance of chloride ion resistance when modified anti-cracking and anti-corrosion plant fibers are not added; comparative example 4 semi-carbonized plant fibers are added on the basis of comparative example 5, so that the diffusion coefficient of chloride ions is reduced, and the performance of chloride ion resistance is improved, probably because the semi-carbonized plant fibers form a three-dimensional network structure in concrete, cracks generated in the concrete are reduced, and the probability of chloride ions permeating into the concrete is reduced; comparative example 3 an inorganic corrosion inhibitor is added on the basis of comparative example 5, so that the diffusion coefficient of chloride ions is further reduced, and the performance of resisting chloride ions is further improved; comparative example 2 an inorganic rust inhibitor and semi-carbonized plant fibers are directly added on the basis of comparative example 5, so that the chloride ion diffusion coefficient is further reduced, and the chloride ion resistance is further improved; the comparative example 1 is that the inorganic rust inhibitor is loaded on the micropores inside the carbonized layer of the semi-carbonized plant fiber and the surface of the carbonized layer, the diffusion coefficient of chloride ions is further reduced, compared with the comparative example 5, the reduction value of the diffusion coefficient of chloride ions is 3.69, compared with the comparative example 4, the reduction value of the comparative example 4 is 0.23, compared with the comparative example 5, the reduction value of the comparative example 3 is 2.22, compared with the comparative example 5, and the diffusion coefficient of chloride ions of the comparative example 3 is larger than the sum of the reduction values of the comparative example 4 and the comparative example 3, which shows that the inorganic rust inhibitor is loaded on the micropores inside the carbonized layer of the semi-carbonized plant fiber and the surface of the carbonized layer in the modifying treatment step, and the inorganic rust inhibitor and the carbonized layer are synergistic, so that the chloride ion resistance of concrete is obviously improved; in the embodiment 2, the surface of the modified plant fiber is coated with the polymer sustained-release membrane, so that the diffusion coefficient of chloride ions is further reduced, and the performance of resisting chloride ions is further improved.
Examples 5 to 8 each changed the oxygen content and the chloride ion diffusion coefficient was gradually decreased, and although the chloride ion diffusion coefficient was the lowest when the oxygen content of example 8 exceeded the range of values of the present application, the total crack area of the concrete of example 8 was high in combination with table 3, and therefore, the oxygen content was preferably 1.5 to 2%. In examples 9 to 10, the concentration of the aqueous solution of the inorganic corrosion inhibitor was changed, and the concentration of the aqueous solution of the inorganic corrosion inhibitor was preferably 110g/L in consideration of the cost and the effect.
Example 11 the polyethylene glycol in the raw material of the polymer sustained release membrane was replaced with polylactic acid of equal weight, and although the diffusion coefficient of chloride ions was reduced, the release rates of calcium nitrite were greater in 7 days, 30 days, and 90 days than in example 9; example 12 the poly (butylene succinate) in the raw material of the polymer sustained-release membrane is replaced by polyvinyl acetate with equal weight, although the diffusion coefficient of chloride ions is reduced, the release rates of calcium nitrite in 7 days, 30 days and 90 days are all larger than that in example 9, which shows that the polymer sustained-release membrane with proper release rate and better mechanical property can be obtained only by compounding polyethylene glycol, poly (vinyl acetate), polylactic acid and poly (butylene succinate) to form the membrane.
Example 13 the amounts of polyvinylacetate and polylactic acid were changed over, and the amounts of polyvinylacetate and polylactic acid were out of the range of the present application, and although the diffusion coefficient of chloride ions was decreased, the release rates of calcium nitrite were greater in 7 days, 30 days and 90 days than in example 9, which shows that the amount of the raw material for the polymer sustained release membrane affects the release rate of the polymer sustained release membrane.
By combining preparation examples 2, 4 and 9 and table 2, it can be seen that the modified anti-crack and anti-corrosion plant fiber has a release rate of calcium nitrite of 10.1-10.4% in 7 days, 17.2-17.5% in 30 days and 25-25.3 in 90 days, which indicates that the polymer slow-release film has a good slow-release effect, can reduce the release rate of the inorganic rust inhibitor and prolong the corrosion prevention time of concrete.
By combining the example 1, the examples 4 to 8 and the comparative examples 4 to 5 with the table 3, it can be seen that the crack resistance of the comparative example 5 is poor when no plant fiber is added, and the total crack area of the crack is reduced when the semi-carbonized plant fiber is added in the comparative example 4, which indicates that the semi-carbonized plant fiber can improve the crack resistance of the concrete; in example 2, when the modified anti-cracking and anti-corrosion plant fiber is added, the total cracking area of the crack is further reduced, which shows that the modified anti-cracking and anti-corrosion plant fiber can improve the anti-cracking performance of the concrete.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (6)
1. The anti-cracking and anti-corrosion C30 concrete is characterized in that: the raw materials comprise the following components in parts by weight:
320-350 parts of cement;
900-1000 parts of coarse aggregate;
700-800 parts of fine aggregate;
70-80 parts of fly ash;
4-8 parts of silicon micropowder;
6-9 parts of mineral powder;
4-6 parts of a polycarboxylic acid water reducing agent;
160-180 parts of water;
10-20 parts of modified anti-cracking anti-corrosion plant fiber;
the preparation method of the modified anti-cracking and anti-corrosion plant fiber comprises the following steps:
preparing plant fibers, and carrying out semi-carbonization treatment on the plant fibers to obtain semi-carbonized plant fibers;
performing modification treatment, namely dissolving an inorganic rust inhibitor in water to prepare an inorganic rust inhibitor aqueous solution, uniformly spraying the inorganic rust inhibitor aqueous solution on the surface of the semi-carbonized plant fiber, and drying to obtain modified plant fiber;
coating treatment, namely uniformly mixing polyvinyl acetate, polylactic acid, polyethylene glycol, a coupling agent, polybutylene succinate, mica powder and an organic solvent to obtain a polymer sustained-release membrane solution; uniformly spraying the polymer slow-release film solution on the surface of the modified plant fiber, and drying to obtain the modified anti-cracking anticorrosive plant fiber;
the plant fiber is corn stalk fiber or sorghum stalk fiber, and the concentration of the inorganic rust inhibitor aqueous solution is 100-120g/L;
the raw materials of the polymer sustained-release membrane comprise the following components in parts by weight:
20-40 parts of polyvinyl acetate;
10-15 parts of polylactic acid;
5-10 parts of polyethylene glycol;
2-4 parts of a coupling agent;
6-8 parts of polybutylene succinate;
1-1.5 parts of mica powder;
40-60 parts of organic solvent.
2. The anti-cracking and anti-corrosion C30 concrete according to claim 1, wherein: the length of the plant fiber is 2-5mm, and the diameter is 60-80 μm.
3. The anti-cracking and anti-corrosion C30 concrete according to claim 1, wherein: the semi-carbonization treatment comprises the following steps: drying, pulverizing, sieving, placing in a sealed environment with oxygen content of 1.5-2%, heating to 300-315 deg.C, holding the temperature for 15-20min, and cooling to obtain semi-carbonized plant fiber.
4. The anti-cracking and anti-corrosion C30 concrete according to claim 1, wherein: the inorganic rust inhibitor is selected from one or more of calcium nitrite, trisodium phosphate and ammonium bicarbonate.
5. The anti-cracking and anti-corrosion C30 concrete according to claim 1, wherein: the coating treatment specifically comprises the following steps: and (3) carrying out spray drying on the polymer slow-release film solution and the modified plant fiber, wherein the inlet temperature is 160-170 ℃, the outlet temperature is 105-110 ℃, and the air flow rate is 30-40L/min, and cooling to obtain the modified anti-cracking anticorrosive plant fiber.
6. The method for preparing the anti-crack and anti-corrosion C30 concrete according to any one of claims 1 to 5, wherein the method comprises the following steps: the method comprises the following steps:
step one, taking cement, fly ash, silica micropowder and mineral powder, and uniformly mixing to obtain first mixed powder;
step two, taking the coarse aggregate and the fine aggregate, and uniformly mixing to obtain a second mixed aggregate;
step three, uniformly mixing a polycarboxylic acid water reducing agent and water to obtain an additive solution;
and step four, uniformly mixing the first mixed powder, the second mixed aggregate, the additive solution and the modified anti-cracking and anti-corrosion plant fiber to obtain the anti-cracking and anti-corrosion C30 concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210701859.XA CN115231868B (en) | 2022-06-21 | 2022-06-21 | Anti-cracking and anti-corrosion C30 concrete and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210701859.XA CN115231868B (en) | 2022-06-21 | 2022-06-21 | Anti-cracking and anti-corrosion C30 concrete and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115231868A CN115231868A (en) | 2022-10-25 |
| CN115231868B true CN115231868B (en) | 2023-03-14 |
Family
ID=83669416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210701859.XA Expired - Fee Related CN115231868B (en) | 2022-06-21 | 2022-06-21 | Anti-cracking and anti-corrosion C30 concrete and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115231868B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115959862B (en) * | 2023-01-10 | 2024-05-28 | 中建西部建设北方有限公司 | Super-retarding anti-cracking concrete and preparation method thereof |
| CN117142788A (en) * | 2023-09-18 | 2023-12-01 | 河南省科学院 | Sustained-release rust-resistant negative carbon recycled concrete material and preparation method and application thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5494748A (en) * | 1989-04-17 | 1996-02-27 | Ecco Gleittechnik Gmbh | Reinforcement fibers and/or process fibers based on plant fibers |
| JPH11246257A (en) * | 1998-03-06 | 1999-09-14 | Kenzai Techno Kenkyusho:Kk | Vegetable fiber cement molding and production thereof |
| CN101787217A (en) * | 2010-01-13 | 2010-07-28 | 广东省造纸研究所 | Plant fiber foam packaging material and manufacturing method thereof |
| CN103483059A (en) * | 2013-09-02 | 2014-01-01 | 济宁道淼新材料科技有限公司 | Preparation method of sustained and controlled release coated material from polymer micro-nano particles employing embedding method |
| CN103601459A (en) * | 2013-11-18 | 2014-02-26 | 武汉理工大学 | Gypsum-based building material prepared from plant fibers for treating indoor formaldehyde and application method thereof |
| CN105669077A (en) * | 2016-02-04 | 2016-06-15 | 成都新柯力化工科技有限公司 | Permeable additive for permeable concrete and preparation method of permeable additive |
| KR101674923B1 (en) * | 2016-05-04 | 2016-11-11 | (주)부루빌 | Repairing method of concrete structure using high-strength polymer mortar and fireproof mortar |
| CN107673679A (en) * | 2017-11-03 | 2018-02-09 | 西安东大洋混凝土有限公司 | A kind of regeneration concrete and preparation method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1069295C (en) * | 1996-01-15 | 2001-08-08 | 王永逵 | High-performance concrete special-use auxiliary material |
| CN103332918B (en) * | 2013-06-26 | 2015-07-22 | 武汉理工大学 | Preparation method of functionalized plant fiber plaster material |
| CN105439502A (en) * | 2015-10-22 | 2016-03-30 | 中铁四局集团有限公司 | Self-compacting concrete for CRTS III slab ballastless track filling layer and preparation method thereof |
-
2022
- 2022-06-21 CN CN202210701859.XA patent/CN115231868B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5494748A (en) * | 1989-04-17 | 1996-02-27 | Ecco Gleittechnik Gmbh | Reinforcement fibers and/or process fibers based on plant fibers |
| JPH11246257A (en) * | 1998-03-06 | 1999-09-14 | Kenzai Techno Kenkyusho:Kk | Vegetable fiber cement molding and production thereof |
| CN101787217A (en) * | 2010-01-13 | 2010-07-28 | 广东省造纸研究所 | Plant fiber foam packaging material and manufacturing method thereof |
| CN103483059A (en) * | 2013-09-02 | 2014-01-01 | 济宁道淼新材料科技有限公司 | Preparation method of sustained and controlled release coated material from polymer micro-nano particles employing embedding method |
| CN103601459A (en) * | 2013-11-18 | 2014-02-26 | 武汉理工大学 | Gypsum-based building material prepared from plant fibers for treating indoor formaldehyde and application method thereof |
| CN105669077A (en) * | 2016-02-04 | 2016-06-15 | 成都新柯力化工科技有限公司 | Permeable additive for permeable concrete and preparation method of permeable additive |
| KR101674923B1 (en) * | 2016-05-04 | 2016-11-11 | (주)부루빌 | Repairing method of concrete structure using high-strength polymer mortar and fireproof mortar |
| CN107673679A (en) * | 2017-11-03 | 2018-02-09 | 西安东大洋混凝土有限公司 | A kind of regeneration concrete and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115231868A (en) | 2022-10-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110540389B (en) | High-performance recycled concrete and preparation process thereof | |
| CN110256023B (en) | Anti-freezing, anti-permeability and anti-cracking concrete and preparation method thereof | |
| CN115231868B (en) | Anti-cracking and anti-corrosion C30 concrete and preparation method thereof | |
| CN113248208B (en) | Steam-curing-free high-strength anti-corrosion tubular pile and preparation method thereof | |
| CN114436601A (en) | Recycled aggregate self-compacting concrete and preparation method thereof | |
| KR101654568B1 (en) | Early strength type shotcrete composite | |
| CN112679190B (en) | Reinforcing waterproof mortar for filling concrete bottom cavity | |
| CN103467037B (en) | A kind of reactive powder cement-base composite material and preparation method thereof | |
| CN111807779B (en) | High-strength waterproof soil consolidation agent | |
| CN112679117A (en) | High-performance portland cement and preparation method thereof | |
| CN110451840B (en) | Composite type compacting agent | |
| CN112142385B (en) | Anti-crack concrete with low shrinkage rate and preparation method thereof | |
| CN114230304A (en) | Environment-friendly anti-freezing concrete and preparation method thereof | |
| CN115677295B (en) | Shotcrete for submarine tunnel and preparation method and application thereof | |
| CN114685140B (en) | Ecological protection layer for improving concrete durability, preparation method and application thereof | |
| CN113620668B (en) | Recycled aggregate concrete and preparation method thereof | |
| KR101709603B1 (en) | Mortar Comprising the Surface Compacting Admixture to Repair Underwater Concrete Structure and Underwater Repairing Method of Concrete Structure Therewith | |
| CN101450846A (en) | Composite type slag powder and production method thereof | |
| CN111153661B (en) | Sulphoaluminate cement-based material for ocean repairing protection engineering and preparation method thereof | |
| CN113979713A (en) | High-performance concrete suitable for high-temperature areas | |
| CN109354436B (en) | Special glue material bag for pre-prepared mortar suitable for washing sea sand and preparation method thereof | |
| CN113603412A (en) | Dry-mixed guniting material composition for coal mine underground roadway and preparation method thereof | |
| CN113072339A (en) | Preparation method of high-toughness cement-based composite material | |
| CN113860813B (en) | Recycled concrete adopting expansive soil modifier | |
| CN111072302B (en) | High-chlorine silicon slurry modified premixed concrete surface hardening agent and preparation method thereof |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20230314 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |