CN112592144A - Corrosion-resistant concrete for offshore sewage pipeline and preparation method thereof - Google Patents
Corrosion-resistant concrete for offshore sewage pipeline and preparation method thereof Download PDFInfo
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- CN112592144A CN112592144A CN202011594322.5A CN202011594322A CN112592144A CN 112592144 A CN112592144 A CN 112592144A CN 202011594322 A CN202011594322 A CN 202011594322A CN 112592144 A CN112592144 A CN 112592144A
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- 238000005260 corrosion Methods 0.000 title claims abstract description 42
- 230000007797 corrosion Effects 0.000 title claims abstract description 39
- 239000010865 sewage Substances 0.000 title claims abstract description 36
- 238000002360 preparation method Methods 0.000 title abstract description 12
- 239000002048 multi walled nanotube Substances 0.000 claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 229920002748 Basalt fiber Polymers 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 19
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 17
- 239000002253 acid Substances 0.000 claims abstract description 13
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 13
- 239000011398 Portland cement Substances 0.000 claims abstract description 12
- 239000010881 fly ash Substances 0.000 claims abstract description 12
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 12
- 239000010440 gypsum Substances 0.000 claims abstract description 12
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 12
- 239000011707 mineral Substances 0.000 claims abstract description 12
- 239000000843 powder Substances 0.000 claims abstract description 12
- 229910021487 silica fume Inorganic materials 0.000 claims abstract description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000004576 sand Substances 0.000 claims abstract description 11
- 239000004575 stone Substances 0.000 claims abstract description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- 239000011259 mixed solution Substances 0.000 claims description 10
- 239000002041 carbon nanotube Substances 0.000 claims description 9
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 9
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 5
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 5
- 239000000292 calcium oxide Substances 0.000 claims description 5
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 5
- 125000000524 functional group Chemical group 0.000 claims description 5
- 229910017604 nitric acid Inorganic materials 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 5
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 4
- 229910052791 calcium Inorganic materials 0.000 claims description 4
- 239000011575 calcium Substances 0.000 claims description 4
- 229910052934 alunite Inorganic materials 0.000 claims description 3
- 239000010424 alunite Substances 0.000 claims description 3
- KPZTWMNLAFDTGF-UHFFFAOYSA-D trialuminum;potassium;hexahydroxide;disulfate Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Al+3].[Al+3].[Al+3].[K+].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O KPZTWMNLAFDTGF-UHFFFAOYSA-D 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 5
- 230000007547 defect Effects 0.000 description 5
- 239000004568 cement Substances 0.000 description 4
- 230000010220 ion permeability Effects 0.000 description 3
- 239000013535 sea water Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 230000009471 action 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
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910001653 ettringite Inorganic materials 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012360 testing 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
- C04B28/14—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 calcium sulfate cements
- C04B28/142—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements
- C04B28/144—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being a flue gas desulfurization product
-
- 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
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant materials
-
- 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 provides corrosion-resistant concrete for an offshore sewage pipeline and a preparation method thereof, wherein the corrosion-resistant concrete comprises the following components in parts by weight: 150-200 parts of ordinary portland cement, 180-220 parts of mineral powder, 50-70 parts of fly ash, 15-30 parts of silica fume, 12-20 parts of desulfurized gypsum, 5-9 parts of polycarboxylic acid high-performance water reducing agent, 12-20 parts of expanding agent, 2-6 parts of basalt fiber, 0.05-0.8 part of modified multi-walled carbon nanotube, 800 parts of sand 600-containing material, 1100 parts of stone 950-containing material and 175 parts of water 160-containing material; the corrosion-resistant concrete for the offshore sewage pipeline, prepared by the invention, has good mechanical property and corrosion resistance, improves the quality of the offshore sewage pipeline and prolongs the service life of the offshore sewage pipeline.
Description
Technical Field
The invention relates to the technical field of cement concrete, in particular to corrosion-resistant concrete for an offshore sewage pipeline and a preparation method thereof.
Background
The existing urban sewage pipeline usually bears the alternate action of dry and wet for a long time due to the fluctuation of sewage, and meanwhile, the concentration of sulfate in the sewage is higher, so that the problem of serious corrosion exists, particularly for a sewage pipeline discharging from an offshore sewage treatment plant, the sewage pipeline is often very easy to be corroded by seawater due to the influence of reverse pouring of the seawater, the seawater contains high-concentration chloride ions and also contains sulfate with a certain concentration, so that the offshore sewage pipeline is in an environment with the coupling action of sulfate corrosion and dry-wet cycle, and the concrete performance for the offshore sewage pipeline is more seriously challenged. Therefore, there is a need to develop a corrosion resistant concrete suitable for use in the sewer pipes of offshore sewage treatment plants to improve the quality and lifetime of the sewer pipes.
Disclosure of Invention
In view of the above, the invention provides corrosion-resistant concrete for an offshore sewage pipeline and a preparation method thereof.
The technical scheme of the invention is realized as follows:
the invention provides corrosion-resistant concrete for an offshore sewage pipeline, which comprises the following components in parts by weight: 150-200 parts of ordinary portland cement, 180-220 parts of mineral powder, 50-70 parts of fly ash, 15-30 parts of silica fume, 12-20 parts of desulfurized gypsum, 5-9 parts of polycarboxylic acid high-performance water reducing agent, 12-20 parts of expanding agent, 2-6 parts of basalt fiber, 0.05-0.8 part of modified multi-walled carbon nanotube, 800 parts of sand 600-containing material, 1100 parts of stone 950-containing material and 175 parts of water 160-containing material.
Further, the modified multi-walled carbon nanotube is obtained by mixing concentrated nitric acid and concentrated sulfuric acid to process the carbon nanotube, and the length-diameter ratio of the modified multi-walled carbon nanotube with carboxyl functional groups is 300-750; the modified multi-walled carbon nanotubes are carboxyl-functionalized at the ends and defect sites of the carbon nanotubes.
The hydrophilic effect of the structure is improved, the dispersibility of the structure in a cement gelling system is improved, and the structure can be intertwined with fibers such as a cement gelling network in the system, so that a physical occlusion structure is formed.
Further, the expanding agent is at least one of calcium oxide, alunite and calcium sulphoaluminate.
Further illustrates that the length-diameter ratio of the basalt fiber is 750-1200.
Further, the fine aggregate is natural river sand, and the fineness modulus is 3.0-2.3.
Further, the coarse aggregate is crushed stone with the particle size of 10mm-25 mm.
A preparation method of corrosion-resistant concrete for an offshore sewage pipeline is characterized by comprising the following steps:
step 1: uniformly mixing water, the modified multi-walled carbon nanotube and the polycarboxylic acid high-performance water reducing agent to obtain a mixed solution;
step 2: and (2) fully mixing the ordinary portland cement, the mineral powder, the fly ash, the silica fume, the desulfurized gypsum, the basalt fiber, the expanding agent, the fine aggregate and the coarse aggregate, adding the mixed solution obtained in the step (1), stirring and reacting for 4-6 minutes, and pouring, vibrating and curing to obtain the offshore sewage pipeline corrosion-resistant concrete material.
Further explaining, in the step 1, water, the modified multi-walled carbon nano-tube and the polycarboxylic acid high-performance water reducing agent are uniformly mixed at the speed of 4000-5000 r/min.
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention uses the common Portland cement, the fly ash, the mineral powder, the silica fume and the desulfurized gypsum in a matching way, on one hand, sulfate ions in the concrete are absorbed and fixed, and the diffusion of the sulfate ions in the concrete is hindered: on the other hand, the compactness of the concrete can be improved, so that the separation speed of calcium hydroxide and the diffusion speed of chloride ions and sulfate ions are reduced, the chloride ion permeability resistance and the sulfate corrosion resistance of the concrete are improved, and the strength and the durability of the concrete are effectively improved.
(2) The invention adopts the expanding agent to generate a large amount of expanded crystal ettringite (C) after the cement is hydrated3A·3CaSO4·32H2O), can fill pores, microcracks and defects, is beneficial to improving the compactness of concrete and further improves the durability of the concrete.
(3) When the concrete is subjected to expansion failure due to sulfate erosion, the expansion of cracks is usually started from microcracks, the initiation and the expansion of the microcracks can be effectively inhibited by utilizing the modified multi-walled carbon nanotubes uniformly dispersed in the modified multi-walled carbon nanotubes, and the further expansion of the microcracks is prevented by utilizing a large number of randomly distributed basalt fibers, so that the ductility of the concrete is improved.
Detailed Description
In order to better understand the technical content of the invention, specific examples are provided below to further illustrate the invention.
The experimental methods used in the examples of the present invention are all conventional methods unless otherwise specified.
The materials, reagents and the like used in the examples of the present invention can be obtained commercially without specific description.
Example 1-a corrosion resistant concrete for offshore sewage pipelines comprising the following components in parts by weight: 150 parts of ordinary portland cement, 180 parts of mineral powder, 50 parts of fly ash, 15 parts of silica fume, 12 parts of desulfurized gypsum, 5 parts of polycarboxylic acid high-performance water reducing agent, 12 parts of expanding agent, 2 parts of basalt fiber, 0.05 part of modified multi-walled carbon nanotube, 600 parts of sand, 950 parts of stone and 160 parts of water;
the modified multi-walled carbon nanotube is obtained by mixing concentrated nitric acid and concentrated sulfuric acid to treat the carbon nanotube, and the length-diameter ratio of the modified multi-walled carbon nanotube with a carboxyl functional group is 300;
the modified multi-walled carbon nanotube is used for functionalizing carboxyl at the end part and the defect part of the carbon nanotube;
the swelling agent is calcium oxide;
the length-diameter ratio of the basalt fibers is 750;
the fine aggregate is natural river sand, and the fineness modulus is 3.0;
the coarse aggregate is broken stone with the particle size of 10 mm.
The preparation method of the corrosion-resistant concrete for the offshore sewage pipeline according to the formula comprises the following steps:
step 1: uniformly mixing water, the modified multi-walled carbon nanotube and the polycarboxylic acid high-performance water reducing agent at 4000r/min to obtain a mixed solution;
step 2: and (2) fully mixing the ordinary portland cement, the mineral powder, the fly ash, the silica fume, the desulfurized gypsum, the basalt fiber, the expanding agent, the fine aggregate and the coarse aggregate, adding the mixed solution obtained in the step (1), stirring and reacting for 4 minutes, and pouring, vibrating and curing to obtain the offshore sewage pipeline corrosion-resistant concrete material.
Example 2-a corrosion resistant concrete for offshore sewage pipelines comprising the following components in parts by weight: 200 parts of ordinary portland cement, 220 parts of mineral powder, 70 parts of fly ash, 30 parts of silica fume, 20 parts of desulfurized gypsum, 9 parts of polycarboxylic acid high-performance water reducing agent, 20 parts of expanding agent, 6 parts of basalt fiber, 0.8 part of modified multi-walled carbon nanotube, 800 parts of sand, 1100 parts of stone and 175 parts of water;
the modified multi-walled carbon nanotube is obtained by mixing concentrated nitric acid and concentrated sulfuric acid to treat the carbon nanotube, and the length-diameter ratio of the modified multi-walled carbon nanotube with a carboxyl functional group is 750;
the modified multi-walled carbon nanotube is used for functionalizing carboxyl at the end part and the defect part of the carbon nanotube;
the expanding agent is formed by mixing calcium oxide and calcium sulphoaluminate according to the weight ratio of 1: 1;
the length-diameter ratio of the basalt fibers is 1200
The fine aggregate is natural river sand with fineness modulus of 2.3
The coarse aggregate is crushed stone with the particle size of 25 mm.
The preparation method of the corrosion-resistant concrete for the offshore sewage pipeline according to the formula comprises the following steps:
step 1: uniformly mixing water, the modified multi-walled carbon nanotube and the polycarboxylic acid high-performance water reducing agent at 5000r/min to obtain a mixed solution;
step 2: and (2) fully mixing the ordinary portland cement, the mineral powder, the fly ash, the silica fume, the desulfurized gypsum, the basalt fiber, the expanding agent, the fine aggregate and the coarse aggregate, adding the mixed solution obtained in the step (1), stirring and reacting for 6 minutes, and pouring, vibrating and curing to obtain the offshore sewage pipeline corrosion-resistant concrete material.
Example 3-a corrosion resistant concrete for offshore sewage pipelines comprising the following components in parts by weight: 180 parts of ordinary portland cement, 200 parts of mineral powder, 60 parts of fly ash, 20 parts of silica fume, 16 parts of desulfurized gypsum, 7 parts of polycarboxylic acid high-performance water reducing agent, 14 parts of expanding agent, 4 parts of basalt fiber, 0.4 part of modified multi-walled carbon nanotube, 700 parts of sand, 1000 parts of stone and 170 parts of water;
the modified multi-walled carbon nanotube is obtained by mixing concentrated nitric acid and concentrated sulfuric acid to treat the carbon nanotube, and the length-diameter ratio of the modified multi-walled carbon nanotube with a carboxyl functional group is 550;
the modified multi-walled carbon nanotube is used for functionalizing carboxyl at the end part and the defect part of the carbon nanotube;
the expanding agent is formed by mixing calcium oxide, alunite and calcium sulphoaluminate according to the weight ratio of 1: 1;
the length-diameter ratio of the basalt fibers is 975;
the fine aggregate is natural river sand with fineness modulus of 2.8
The coarse aggregate is crushed stone with the particle size of 18 mm.
The preparation method of the corrosion-resistant concrete for the offshore sewage pipeline according to the formula comprises the following steps:
step 1: uniformly mixing water, the modified multi-walled carbon nanotube and the polycarboxylic acid high-performance water reducing agent at 5000r/min to obtain a mixed solution;
step 2: and (2) fully mixing the ordinary portland cement, the mineral powder, the fly ash, the silica fume, the desulfurized gypsum, the basalt fiber, the expanding agent, the fine aggregate and the coarse aggregate, adding the mixed solution obtained in the step (1), stirring and reacting for 5 minutes, and pouring, vibrating and curing to obtain the offshore sewage pipeline corrosion-resistant concrete material.
Comparative example 1-corrosion resistant concrete for offshore sewer pipes according to example 3 and a process for its preparation, the difference being: the number of the added modified multi-wall carbon nano-tubes and the number of the basalt fibers are 8.
Comparative example 2-corrosion resistant concrete for offshore sewer piping according to example 3 and process for its preparation, with the difference that: unmodified carbon nanotubes are used instead of modified multi-walled carbon nanotubes.
Comparative example 3-corrosion resistant concrete for offshore sewer piping according to example 3 and process for its preparation, with the difference that: 0.02 part of modified multi-wall carbon nano tube and 8 parts of basalt fiber.
The properties of the corrosion-resistant concrete material for the offshore sewage pipeline prepared in the above examples and comparative examples, such as compressive strength, chloride ion permeability resistance, and sulfate corrosion resistance, are determined as follows:
the test method comprises the following steps: performing performance test on the concrete according to GB/50164-2011 and GB/T50082-2009;
the test results are given in the following table:
as can be seen from the results of the above-mentioned measurements, the compressive strength of the corrosion-resistant concrete material for the offshore sewage pipeline prepared in the embodiments 1-3 of the invention is obviously increased, the impermeability is not less than P12, the chloride ion permeability is obviously improved, and the sulfate erosion resistance level can reach KS150, which indicates that the corrosion-resistant concrete material for the offshore sewage pipeline not only has good mechanical properties, but also has better corrosion resistance, and can improve the quality and service life of the offshore sewage pipeline. In contrast, as can be seen from the comparison between example 3 and comparative examples 1 to 3, the impermeability and the corrosion resistance in comparative examples 1 and 2 are significantly reduced. As can be seen from comparative example 3, the corrosion resistance of the concrete material is significantly affected by adjusting the ratio of the modified multi-walled carbon nanotube to the basalt fiber.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. A corrosion-resistant concrete for offshore sewage pipelines, characterized in that: the composition comprises the following components in parts by weight: 150-200 parts of ordinary portland cement, 180-220 parts of mineral powder, 50-70 parts of fly ash, 15-30 parts of silica fume, 12-20 parts of desulfurized gypsum, 5-9 parts of polycarboxylic acid high-performance water reducing agent, 12-20 parts of expanding agent, 2-6 parts of basalt fiber, 0.05-0.8 part of modified multi-walled carbon nanotube, 800 parts of sand 600-containing material, 1100 parts of stone 950-containing material and 175 parts of water 160-containing material.
2. The corrosion resistant concrete for offshore sewer pipes of claim 1, wherein: the modified multi-walled carbon nanotube is obtained by mixing concentrated nitric acid and concentrated sulfuric acid to process the carbon nanotube, and the length-diameter ratio of the modified multi-walled carbon nanotube with carboxyl functional groups is 300-750.
3. The corrosion resistant concrete for offshore sewer pipes of claim 1, wherein: the expanding agent is at least one of calcium oxide, alunite and calcium sulphoaluminate.
4. The corrosion resistant concrete for offshore sewer pipes of claim 1, wherein: the length-diameter ratio of the basalt fiber is 750-1200.
5. The corrosion resistant concrete for offshore sewer pipes of claim 1, wherein: the fine aggregate is natural river sand, and the fineness modulus is 3.0-2.3.
6. The corrosion resistant concrete for offshore sewer pipes of claim 1, wherein: the coarse aggregate is crushed stone with the particle size of 10mm-25 mm.
7. A method of preparing corrosion resistant concrete for an offshore sewage pipeline according to any of claims 1 to 6, comprising the steps of:
step 1: uniformly mixing water, the modified multi-walled carbon nanotube and the polycarboxylic acid high-performance water reducing agent to obtain a mixed solution;
step 2: and (2) fully mixing the ordinary portland cement, the mineral powder, the fly ash, the silica fume, the desulfurized gypsum, the basalt fiber, the expanding agent, the fine aggregate and the coarse aggregate, adding the mixed solution obtained in the step (1), stirring and reacting for 4-6 minutes, and pouring, vibrating and curing to obtain the offshore sewage pipeline corrosion-resistant concrete material.
8. The method of claim 7, wherein the method comprises: in the step 1, water, the modified multi-walled carbon nano-tube and the polycarboxylic acid high-performance water reducing agent are uniformly mixed at the speed of 4000-5000 r/min.
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| CN202011594322.5A CN112592144A (en) | 2020-12-29 | 2020-12-29 | Corrosion-resistant concrete for offshore sewage pipeline and preparation method thereof |
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| CN202011594322.5A CN112592144A (en) | 2020-12-29 | 2020-12-29 | Corrosion-resistant concrete for offshore sewage pipeline and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114956771A (en) * | 2022-04-29 | 2022-08-30 | 山西中矿威特矿山技术开发有限公司 | Inorganic composite type mining grouting reinforcement material |
| CN117735869A (en) * | 2024-02-21 | 2024-03-22 | 北京安科兴业科技股份有限公司 | Carbon nano tube reinforced magnesium silicate cementing material and preparation method thereof |
-
2020
- 2020-12-29 CN CN202011594322.5A patent/CN112592144A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114956771A (en) * | 2022-04-29 | 2022-08-30 | 山西中矿威特矿山技术开发有限公司 | Inorganic composite type mining grouting reinforcement material |
| CN117735869A (en) * | 2024-02-21 | 2024-03-22 | 北京安科兴业科技股份有限公司 | Carbon nano tube reinforced magnesium silicate cementing material and preparation method thereof |
| CN117735869B (en) * | 2024-02-21 | 2024-05-28 | 北京安科兴业科技股份有限公司 | Carbon nano tube reinforced magnesium silicate cementing material and preparation method thereof |
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Application publication date: 20210402 |