CN112194427B - Preparation method of high-waterproof corrosion-resistant concrete - Google Patents
Preparation method of high-waterproof corrosion-resistant concrete Download PDFInfo
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- CN112194427B CN112194427B CN202010931448.0A CN202010931448A CN112194427B CN 112194427 B CN112194427 B CN 112194427B CN 202010931448 A CN202010931448 A CN 202010931448A CN 112194427 B CN112194427 B CN 112194427B
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- 239000004567 concrete Substances 0.000 title claims abstract description 27
- 230000007797 corrosion Effects 0.000 title claims abstract description 12
- 238000005260 corrosion Methods 0.000 title claims abstract description 12
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 55
- 239000000835 fiber Substances 0.000 claims abstract description 45
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 44
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 44
- 239000004113 Sepiolite Substances 0.000 claims abstract description 33
- 229910052624 sepiolite Inorganic materials 0.000 claims abstract description 33
- 235000019355 sepiolite Nutrition 0.000 claims abstract description 33
- 239000004568 cement Substances 0.000 claims abstract description 28
- 238000002156 mixing Methods 0.000 claims abstract description 28
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000005543 nano-size silicon particle Substances 0.000 claims abstract description 22
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 22
- 239000000843 powder Substances 0.000 claims abstract description 20
- 238000000498 ball milling Methods 0.000 claims abstract description 17
- 238000003756 stirring Methods 0.000 claims abstract description 13
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 claims abstract description 10
- REYJJPSVUYRZGE-UHFFFAOYSA-N Octadecylamine Chemical compound CCCCCCCCCCCCCCCCCCN REYJJPSVUYRZGE-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910001425 magnesium ion Inorganic materials 0.000 claims abstract description 10
- 238000007599 discharging Methods 0.000 claims abstract description 8
- 239000001257 hydrogen Substances 0.000 claims abstract description 8
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 8
- -1 hydrogen ions Chemical class 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims description 34
- 238000000227 grinding Methods 0.000 claims description 15
- 239000002994 raw material Substances 0.000 claims description 11
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 10
- 239000004115 Sodium Silicate Substances 0.000 claims description 7
- PAZHGORSDKKUPI-UHFFFAOYSA-N lithium metasilicate Chemical compound [Li+].[Li+].[O-][Si]([O-])=O PAZHGORSDKKUPI-UHFFFAOYSA-N 0.000 claims description 7
- 229910052912 lithium silicate Inorganic materials 0.000 claims description 7
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 7
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 7
- 239000011398 Portland cement Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 239000011324 bead Substances 0.000 claims description 5
- 238000004806 packaging method and process Methods 0.000 claims description 5
- 239000013535 sea water Substances 0.000 abstract description 10
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 abstract description 4
- 230000007774 longterm Effects 0.000 abstract description 2
- 239000000047 product Substances 0.000 description 15
- 230000000052 comparative effect Effects 0.000 description 14
- 238000012360 testing method Methods 0.000 description 12
- 230000008439 repair process Effects 0.000 description 11
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 239000000377 silicon dioxide Substances 0.000 description 8
- 239000000499 gel Substances 0.000 description 7
- 239000004111 Potassium silicate Substances 0.000 description 5
- 239000013078 crystal Substances 0.000 description 5
- 238000006703 hydration reaction Methods 0.000 description 5
- 230000002209 hydrophobic effect Effects 0.000 description 5
- 229920000642 polymer Polymers 0.000 description 5
- 229910052913 potassium silicate Inorganic materials 0.000 description 5
- 235000019353 potassium silicate Nutrition 0.000 description 5
- NNHHDJVEYQHLHG-UHFFFAOYSA-N potassium silicate Chemical compound [K+].[K+].[O-][Si]([O-])=O NNHHDJVEYQHLHG-UHFFFAOYSA-N 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000036571 hydration Effects 0.000 description 4
- 239000011083 cement mortar Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 3
- 239000004570 mortar (masonry) Substances 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- 229910008051 Si-OH Inorganic materials 0.000 description 2
- 229910006358 Si—OH Inorganic materials 0.000 description 2
- 239000000378 calcium silicate Substances 0.000 description 2
- 229910052918 calcium silicate Inorganic materials 0.000 description 2
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000001902 propagating effect Effects 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 229910018557 Si O Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000006482 condensation reaction Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000001804 emulsifying effect Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 239000000017 hydrogel Substances 0.000 description 1
- GPRLSGONYQIRFK-UHFFFAOYSA-N hydron Chemical compound [H+] GPRLSGONYQIRFK-UHFFFAOYSA-N 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 229910021487 silica fume Inorganic materials 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Inorganic materials [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000010998 test method Methods 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
- C04B28/04—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a high waterproof corrosion-resistant concrete and a preparation method thereof, wherein the concrete comprises graphene oxide, sepiolite, shell powder, water-soluble silicate, cement and nano silicon dioxide fibers; wherein octadecylamine is grafted on the edge of the graphene oxide, and the grafting rate is not lower than 75%; part of magnesium ions in the molecular skeleton of the sepiolite are replaced by hydrogen ions, and the replacement rate is not lower than 90 percent; the nano silicon dioxide fiber is short fiber; when the product is prepared, firstly, graphene oxide, sepiolite, shell powder, water-soluble silicate and cement are mixed and poured into a ball milling tank, anhydrous sodium sulfate with the mass of 1-3% of that of the graphene oxide is added, after ball milling and mixing are carried out for 4-6 h, nano silicon dioxide fiber is added, stirring and mixing are carried out for 1-3 h, and then discharging is carried out, so that the product is obtained. The product obtained by the invention has good corrosion resistance and can keep long-term stability in a seawater environment.
Description
Technical Field
The invention relates to the technical field of inorganic cementing materials, in particular to a preparation method of high-waterproof corrosion-resistant concrete.
Background
In marine environments, there are many materials used for concrete repair, and polymer repair materials, epoxy repair materials and cement-based repair materials are commonly used. Research shows that in the marine environment, although the bonding performance of the polymer mortar is higher than that of self-compacting cement mortar, the durability of the polymer mortar is poorer than that of the self-compacting cement mortar; in the marine superfine area, the bonding performance of the epoxy resin material is inferior to that of common Portland cement. Therefore, compared with polymer repair materials and epoxy resin repair materials, the cement-based repair materials are more suitable for the repair engineering of concrete structures in marine environments. Although the bonding strength of the common cement is low, the performance of the common cement is improved by adding an expanding agent, silica fume and the like, so that the bonding performance and the durability of the cement-based material can be effectively improved. Aiming at the problem that the existing polymer repair material and epoxy resin repair material are generally poor in durability, if the modified cement can be used as a repair material for concrete cracks and defects, the advantages of low cost and good durability of the material can be fully utilized, and the durability of a concrete structure can be greatly improved.
Disclosure of Invention
The invention aims to provide a preparation method of high-waterproof corrosion-resistant concrete, which aims to overcome the defects of poor seawater corrosion resistance and poor durability of the concrete in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
the high-waterproof corrosion-resistant concrete comprises the following raw materials in parts by weight:
10-20 parts of graphene oxide
10-20 parts of sepiolite
8-10 parts of shell powder
3-5 parts of water-soluble silicate
20-60 parts of cement
The technical scheme of the invention introduces graphene oxide, sepiolite, shell powder and water-soluble silicate into a cement system, firstly, the graphene oxide and the sepiolite are both of a layered structure, wherein the molecular structure of the graphene oxide contains a hydrophilic edge region and a hydrophobic conjugate region, so that the graphene oxide has good emulsifying property, the graphene oxide can effectively permeate into a pore structure of retarded soil in the using process, and the repairing effect on the internal gap of concrete is realized, in addition, because the hydration process of the concrete is actually the formation process of calcium silicate gel, in the process, the hydrophilic end of the graphene oxide can be adsorbed and fixed by hydrophilic calcium silicate gel and forms firm chemical bonding, thereby forming a graphene oxide layer on the surface of hydrogel, and the hydrophobic conjugate region of the graphene oxide is left on the surface, so as to play a good waterproof effect, the graphene sheet layer is high in strength and good in lubricating property, and can effectively avoid the stability of concrete in a long-term seawater environment; the layered sepiolite can be quickly swelled and dispersed when the product is mixed with water for the first time, the formed monomer fiber or smaller fiber bundle is irregularly dispersed, and a stable suspension with rheological property is formed in a lamellar structure of the graphene oxide, so that the internal components can be stably compatible, and the components uniformly exist in the hydration process, thereby effectively avoiding the performance reduction caused by the sedimentation of the filler, especially the filler with higher density, in the transportation and cement hydration processes;
in addition, due to the introduction of the shell powder, a graphene oxide lamellar structure and a dissociated sepiolite fiber bundle can be effectively filled to fill the reserved pores, a three-dimensional dense filling system jointly constructed by particles, a flat layer and the fiber bundle is formed, and the shell powder is seawater corrosion resistant, so that seawater is not easy to corrode and enter the hardened concrete, and a good durable effect is achieved.
Further, the graphene oxide is graphene oxide with octadecyl amine grafted at the edge.
Further, the grafting rate of octadecylamine on the edge of the graphene oxide is not less than 75%.
According to the technical scheme, the medium at the edge of the graphene oxide has a hydrophobic functional group, so that the hydrophobic effect of the whole system is improved; meanwhile, the existence of the long-chain alkyl of the octadecylamine can be intertwined with fibers such as a cement gel network in a system, so that a physical occlusion structure is formed, the oxidized graphene on the surface of the concrete is prevented from being stripped when the concrete is stressed, and the durability of the water resistance is improved.
Further, the sepiolite is sepiolite in which part of magnesium ions in a molecular skeleton are replaced by hydrogen ions.
Further, the substitution rate of the hydrogen ions for the magnesium ions is not less than 90%.
According to the technical scheme, partial magnesium ions in the sepiolite framework are substituted, so that Si-O groups in the framework are converted into active Si-OH, the active Si-OH participates in the hydration reaction of cement, the sepiolite framework and a cement hydration gel system form an organic integral body, the cohesive strength is improved, and the durability of the product is further improved.
Further, the water-soluble silicate includes sodium silicate, potassium silicate and/or lithium silicate.
According to the technical scheme, sodium silicate, potassium silicate and lithium silicate are introduced to be matched with each other, and can be subjected to chemical reaction with a large amount of semi-hydrated cement, free calcium hydroxide and the like in old concrete to form permanent silicate gel, the gel can be crystallized in the concrete to form a hard and wear-resistant structure, so that a concrete interface becomes a compact whole, and after the gel is used, the number of coarse crystals in the interface layer is small, most of the coarse crystals are fine crystals, so that the early and later bonding strength of the concrete interface is greatly improved, and the durability is excellent.
Further, the high-waterproof corrosion-resistant concrete also comprises nano silicon dioxide fibers accounting for 1-10% of the weight of the cement.
Further, the length-diameter ratio of the nano-silica fiber is 3: 1-10: 1 of nano-silica short fibers.
According to the technical scheme, the nano silicon dioxide fiber with high activity is introduced, and the adoption of short fiber is further limited; compared with long fibers, the short fibers are more in number under the condition of the same addition amount, when concrete fails, crack propagation tends to start from a fine crack, more short fibers are distributed in the concrete, the crack is prevented from further propagating, and the long fibers cannot effectively prevent the crack from further propagating at the same crack.
A preparation method of high-waterproof corrosion-resistant concrete comprises the following specific preparation steps:
(1) preparing raw materials;
(2) mixing and ball-milling graphene oxide, sepiolite, shell powder, water-soluble silicate and cement for 4-6 h, adding nano-silica fiber, stirring and mixing for 1-3 h, and discharging to obtain the graphene oxide/sepiolite/silica gel composite material.
Further, the specific preparation steps are as follows:
(1) preparing raw materials;
(2) firstly, mixing graphene oxide, sepiolite, shell powder, water-soluble silicate and cement, pouring the mixture into a ball milling tank, adding anhydrous sodium sulfate accounting for 1-3% of the mass of the graphene oxide, carrying out ball milling mixing for 4-6 h, then adding nano silicon dioxide fibers, stirring and mixing for 1-3 h, and then discharging to obtain the graphene oxide/silica nano silicon dioxide composite material.
According to the technical scheme, the raw materials except the nano silicon dioxide fiber and the anhydrous sodium sulfate are subjected to ball milling reaction, mixing and refining of the raw materials are firstly carried out in the ball milling process, after the refining reaches a certain degree, powder is not refined, dislocation and slippage are carried out inside the powder, so that the size of crystal grains is further reduced, the dislocation and slippage simultaneously cause disorder of internal crystal grain orientation, and then the dehydration condensation reaction between active silicon hydroxyl groups under the low-temperature condition is realized under the action of the anhydrous sodium sulfate, so that a certain degree of chemical reaction is firstly carried out among active components, firm rigid silicon-oxygen bonds are formed, the interaction among different active components is improved, and the mechanical property of the product is effectively improved.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
According to the weight parts, sequentially taking 10-20 parts of graphene oxide, 10-20 parts of sepiolite, 8-10 parts of shell powder, 3-5 parts of water-soluble silicate, 20-60 parts of 42.5# ordinary portland cement and nano-silica fiber accounting for 1-10% of the mass of the cement; octadecylamine is grafted on the edge of the graphene oxide, and the grafting rate is not lower than 75%; part of magnesium ions in the molecular skeleton of the sepiolite are replaced by hydrogen ions, and the replacement rate is not lower than 90%; and the length-diameter ratio of the nano silicon dioxide fiber is 3: 1-10: 1, a staple fiber; the water-soluble silicate comprises sodium silicate, potassium silicate and/or lithium silicate;
firstly, mixing graphene oxide, sepiolite, shell powder, water-soluble silicate and cement, pouring the mixture into a ball milling tank, and mixing the materials according to a ball material mass ratio of 10: 1-30: adding zirconia ball grinding beads into the raw material 1, ball-milling and mixing for 4-6 h under the conditions that the rotation speed is 350-450 r/min and the revolution speed is 300-500 r/min to obtain ball grinding materials, transferring the ball grinding materials and the nano silicon dioxide fibers into a mixer, stirring and mixing for 1-3 h under the condition that the stirring speed is 300-800 r/min, discharging and packaging to obtain the product.
Example 1
According to the weight parts, sequentially taking 10 parts of graphene oxide, 10 parts of sepiolite, 8 parts of shell powder, 3 parts of water-soluble silicate, 20 parts of No. 42.5 ordinary portland cement and nano silicon dioxide fibers accounting for 1% of the mass of the cement; octadecylamine is grafted on the edge of the graphene oxide, and the grafting rate is 75%; part of magnesium ions in the molecular skeleton of the sepiolite are replaced by hydrogen ions, and the replacement rate is 90 percent; and the length-diameter ratio of the nano silicon dioxide fiber is 3: 1, a staple fiber; the water-soluble silicate comprises sodium silicate, potassium silicate and lithium silicate;
firstly, mixing graphene oxide, sepiolite, shell powder, water-soluble silicate and cement, pouring the mixture into a ball milling tank, and mixing the materials according to a ball material mass ratio of 10: adding zirconia ball grinding beads into the raw material 1, ball-milling and mixing for 4 hours under the conditions that the rotation speed is 350r/min and the revolution speed is 300r/min to obtain ball grinding materials, transferring the ball grinding materials and the nano silicon dioxide fibers into a mixer, stirring and mixing for 1 hour under the condition that the stirring speed is 300r/min, discharging and packaging to obtain the product.
Example 2
According to the weight parts, 15 parts of graphene oxide, 15 parts of sepiolite, 9 parts of shell powder, 4 parts of water-soluble silicate, 40 parts of 42.5# ordinary portland cement and nano silicon dioxide fibers accounting for 5% of the mass of the cement are taken in sequence; octadecylamine is grafted on the edge of the graphene oxide, and the grafting rate is 80%; part of magnesium ions in the molecular skeleton of the sepiolite are replaced by hydrogen ions, and the replacement rate is 92 percent; and the length-diameter ratio of the nano silicon dioxide fiber is 5: 1, a staple fiber; the water-soluble silicate comprises sodium silicate and lithium silicate;
firstly, mixing graphene oxide, sepiolite, shell powder, water-soluble silicate and cement, pouring the mixture into a ball milling tank, and mixing the materials according to a ball material mass ratio of 20: adding zirconia ball grinding beads into the raw material 1, ball-milling and mixing for 5 hours under the conditions that the rotation speed is 400r/min and the revolution speed is 400r/min to obtain ball grinding materials, transferring the ball grinding materials and the nano silicon dioxide fibers into a mixer, stirring and mixing for 2 hours under the condition that the stirring speed is 500r/min, discharging and packaging to obtain the product.
Example 3
According to the weight parts, 20 parts of graphene oxide, 20 parts of sepiolite, 10 parts of shell powder, 5 parts of water-soluble silicate, 60 parts of No. 42.5 ordinary portland cement and nano silicon dioxide fibers accounting for 10% of the mass of the cement are taken in sequence; octadecylamine is grafted on the edge of the graphene oxide, and the grafting rate is 90%; part of magnesium ions in the molecular skeleton of the sepiolite are replaced by hydrogen ions, and the replacement rate is 98 percent; and the length-diameter ratio of the nano silicon dioxide fiber is 10: 1, a staple fiber; the water-soluble silicate comprises sodium silicate, potassium silicate and lithium silicate;
firstly, mixing graphene oxide, sepiolite, shell powder, water-soluble silicate and cement, pouring the mixture into a ball milling tank, and mixing the materials according to a ball material mass ratio of 30: adding zirconia ball grinding beads into the raw material 1, ball-milling and mixing for 6 hours under the conditions that the rotation speed is 450r/min and the revolution speed is 500r/min to obtain ball grinding materials, transferring the ball grinding materials and the nano silicon dioxide fibers into a mixer, stirring and mixing for 3 hours under the condition that the stirring speed is 800r/min, discharging and packaging to obtain the product.
Comparative example 1
This comparative example is different from example 1 in that no graphene oxide was added and the remaining conditions were maintained.
Comparative example 2
Compared with example 1, the difference between the comparative example and example 1 is that graphene oxide is not grafted with octadecylamine, and the rest conditions are not changed.
Comparative example 3
This comparative example is compared to example 1 with the difference that sepiolite was not added and the remaining conditions were kept unchanged.
Comparative example 4
This comparative example is different from example 1 in that the magnesium ion in the molecular structure of sepiolite is not replaced by hydrogen ion, and the rest of the conditions are kept unchanged.
Comparative example 5
This comparative example is different from example 1 in that no nano-silica fiber was added and the remaining conditions were not changed.
Comparative example 6
This comparative example is different from example 1 in that the nano silica fiber is a long fiber and the remaining conditions are maintained.
The products obtained in examples 1 to 3 and comparative examples 1 to 6 were subjected to performance tests, the specific test modes and test results are as follows:
the mortar test block prepared by the products of the above examples and comparative examples, the test block size is 150mm multiplied by 30mm, after the test block is maintained for 7d, the test block is soaked in seawater at 20 ℃, the seawater is replaced for 1 time every 3 weeks, and the flexural strength of the test block maintained for 28d and 120d by seawater is respectively tested; the preparation of the test block, the standard maintenance and the strength test are carried out according to the regulation of GB/T17671-1999 cement mortar strength test method; the specific test results are shown in table 1:
table 1: product performance test meter
The detection results in table 1 show that the introduction of graphene oxide has a great influence on the seawater erosion resistance of the product, the nano-silica fiber has a certain influence on the flexural strength of the product, and the influence of sepiolite is the smallest, so that the product of the example of the present application has no change in strength in the 120d test process, and has excellent seawater erosion resistance, and after 120d, when the product test block is taken out, the stable hydrophobic film is formed on the products of examples 1 to 3.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference thereto is therefore intended to be embraced therein.
Claims (1)
1. A preparation method of high-waterproof corrosion-resistant concrete is characterized by comprising the following steps:
(1) preparing raw materials; according to the weight parts, 15 parts of graphene oxide, 15 parts of sepiolite, 9 parts of shell powder, 4 parts of water-soluble silicate, 40 parts of 42.5# ordinary portland cement and nano silicon dioxide fibers accounting for 5% of the mass of the cement are taken in sequence; octadecylamine is grafted on the edge of the graphene oxide, and the grafting rate is 80%; part of magnesium ions in the molecular skeleton of the sepiolite are replaced by hydrogen ions, and the replacement rate is 92 percent; and the length-diameter ratio of the nano silicon dioxide fiber is 5: 1, a staple fiber; the water-soluble silicate comprises sodium silicate and lithium silicate;
(2) firstly, mixing graphene oxide, sepiolite, shell powder, water-soluble silicate and cement, pouring the mixture into a ball milling tank, and mixing the materials according to a ball material mass ratio of 20: adding zirconia ball grinding beads into the raw material 1, ball-milling and mixing for 5 hours under the conditions that the rotation speed is 400r/min and the revolution speed is 400r/min to obtain ball grinding materials, transferring the ball grinding materials and the nano silicon dioxide fibers into a mixer, stirring and mixing for 2 hours under the condition that the stirring speed is 500r/min, discharging and packaging to obtain the product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010931448.0A CN112194427B (en) | 2019-11-30 | 2019-11-30 | Preparation method of high-waterproof corrosion-resistant concrete |
Applications Claiming Priority (2)
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| CN117466606B (en) * | 2023-12-28 | 2024-04-09 | 中科信德建设有限公司 | Grouting material and application thereof in dam curtain grouting |
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| CN110015873A (en) * | 2019-05-27 | 2019-07-16 | 王彦超 | A kind of environment protection, low cost packing material suitable for constructing tunnel goaf |
| CN112608106A (en) * | 2020-12-30 | 2021-04-06 | 重庆中防德邦防水技术有限公司 | Cement-based permeable crystallization type waterproof material based on graphene oxide modification and preparation method thereof |
| CN112979212B (en) * | 2021-02-16 | 2022-07-12 | 广东邦润建设有限公司 | Waterproof agent for concrete and preparation method thereof |
| CN114014599A (en) * | 2021-12-03 | 2022-02-08 | 绍兴文理学院元培学院 | Sound-absorbing and shock-absorbing building material and preparation method thereof |
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| Publication number | Publication date |
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| CN112194427A (en) | 2021-01-08 |
| CN110903058A (en) | 2020-03-24 |
| CN112194426B (en) | 2021-12-24 |
| CN112194426A (en) | 2021-01-08 |
| CN110903058B (en) | 2020-10-27 |
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