CN110776292A - Marine engineering anti-abrasion chloride-corrosion-resistant concrete - Google Patents
Marine engineering anti-abrasion chloride-corrosion-resistant concrete Download PDFInfo
- Publication number
- CN110776292A CN110776292A CN201911164863.1A CN201911164863A CN110776292A CN 110776292 A CN110776292 A CN 110776292A CN 201911164863 A CN201911164863 A CN 201911164863A CN 110776292 A CN110776292 A CN 110776292A
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- Prior art keywords
- resistant
- abrasion
- marine
- chloride
- corrosion
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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
- C04B2111/24—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
- 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
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- 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 marine anti-erosion and anti-corrosion concrete against chloride salt, which is prepared from cement, ceramic powder, superfine mineral powder, broken stone, river sand, polycarboxylic acid high-efficiency water reducing agent and water in proportion. According to the invention, granite and other gravels with excellent abrasion resistance are selected, the maximization of the aggregate content of the gravels is realized, and the abrasion resistance of concrete is effectively improved; ceramic powder is used as a blending material, so that the erosion and abrasion resistance of the cement paste is improved, and meanwhile, chloride ions are adsorbed by using hydrated calcium aluminate generated by secondary hydration reaction at the later stage, the inward transmission of the chloride ions is inhibited, and the corrosion of reinforcing steel bars is reduced; meanwhile, the superfine mineral powder is used as a blending material, so that the bonding force of a slurry-aggregate interface is improved, the porosity of the slurry is reduced, the erosion and abrasion resistance of concrete is improved, meanwhile, the inward transmission of erosion ions is inhibited, and the corrosion of reinforcing steel bars is reduced. The marine abrasion-resistant chloride corrosion-resistant concrete prepared by the invention has high sand-holding surge erosion resistance and high chloride ion erosion resistance, and has important engineering application value.
Description
Technical Field
The invention belongs to the field of building materials, and particularly relates to marine anti-abrasion chloride-corrosion-resistant concrete and a preparation method thereof.
Background
The bridge pier column in the marine environment is corroded by chlorine salt for a long time and simultaneously can be subjected to scouring action of sand-carried surge. Under the erosion and abrasion action of sand-carrying surge, the concrete protective layer of the pier has the phenomena of thickness reduction, surface damage and the like, so that the path of chloride ions permeating into the structure is shortened, and the corrosion of reinforcing steel bars is accelerated. Meanwhile, the concrete protective layer cracking caused by the corrosion of the steel bars can further aggravate the corrosion of chloride and the erosion abrasion, and the normal use and the safe operation of the bridge are influenced. Therefore, when the mix proportion of the marine concrete is designed, the chlorine ion penetration resistance and the impact resistance and the wear resistance of the concrete are comprehensively considered.
At present, marine concrete is usually modified and designed aiming at the chloride ion permeability resistance, the sulfate erosion resistance, the impermeability and the like, and the synergistic design aiming at the chloride ion permeability resistance and the abrasion resistance is lacked; further exploring the marine anti-abrasion and chloride corrosion resistant concrete, and having important research and application significance.
Disclosure of Invention
The invention mainly aims to provide marine engineering anti-abrasion chloride-erosion-resistant concrete aiming at the defects of the existing marine engineering concrete, which has excellent anti-abrasion performance and anti-chloride ion permeability, can effectively ensure the service performance and durability of the marine engineering concrete, and the related preparation method is simple and is suitable for popularization and application.
In order to achieve the purpose, the invention adopts the technical scheme that:
marine engineering erosion-resistant and abrasion-resistant chlorine salt erosion-resistant materialThe concrete comprises the following components in parts by weight: 180-260 kg/m cement
360-100 kg/m of ceramic powder
380-130 kg/m of superfine mineral powder
31000-1200 kg/m of crushed stone
3720-800 kg/m river sand
3And a water reducing agent of 7 to 11kg/m
3110 to 140kg/m of water
3。
In the scheme, the cement is P.O42.5 or P.II42.5 cement, and the specific surface area is less than or equal to 350m
2/kg。
In the scheme, the specific surface area of the ceramic powder is 400-500 m
2Per kg; wherein, the chemical components and the mass percentage thereof comprise: 1-2% of CaO, SiO
260～70％，Al
2O
320～30％，MgO 2～3％，SO
32～3％。
In the scheme, the specific surface area of the superfine mineral powder is 700-900 m
2Per kg; wherein, the chemical components and the mass percentage thereof comprise: 35-40% of CaO and SiO
225～30％，Al
2O
315～20％，MgO 5～10％，SO
32～5％。
In the scheme, the crushed stone is granite, basalt, quartzite and other crushed stones with 5-25 mm continuous gradation, and the crushing value is less than or equal to 5%.
In the scheme, the river sand is medium coarse sand, the fineness modulus is 2.3-3.0, and the mud content is less than or equal to 0.5 wt%.
In the scheme, the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent, and the water reducing rate is more than or equal to 25 percent
The marine concrete obtained according to the scheme has the 28d compressive strength of more than or equal to 65MPa, the 28d impact and abrasion resistance strength of more than or equal to 0.8h/cm and the 56d chloride ion diffusion coefficient of less than or equal to 1.5 multiplied by 10
-12m
2S; is suitable for marine concrete structures such as splash zones and the like.
The principle of the invention is as follows:
compared with the prior art, the invention has the beneficial effects that:
1) according to the invention, the ceramic powder is filled in the cement slurry as the micro-aggregate, so that the anti-impact grinding strength of slurry components in the concrete is effectively improved, and further, the anti-impact grinding strength of the whole concrete is improved; meanwhile, aluminate generated in the process of secondary hydration reaction of the ceramic powder can effectively combine more chloride ions, and the diffusion coefficient of the chloride ions in the concrete is further reduced.
2) The added superfine mineral powder can participate in secondary hydration reaction to a greater extent to generate more calcium silicate hydrate with physical adsorption to chloride ions and calcium aluminate hydrate with chemical adsorption to the chloride ions, and the aperture is refined, the compactness of the concrete is improved, and therefore the diffusion rate of the chloride ions to the interior of the concrete is delayed; meanwhile, the improvement effect of the superfine mineral powder on the slurry-aggregate interface structure reduces the possibility that the aggregate falls off from the concrete matrix, thereby improving the abrasion resistance of the concrete.
3) According to the invention, a cement-ceramic powder-superfine mineral powder ternary cementing material system is adopted, ceramic powder with smaller fineness is filled in gaps among cement particles, and superfine mineral powder with smaller fineness is filled in gaps among ceramic powder particles to obtain tightly-packed powder, and further secondary hydration and interface improvement effects of the ceramic powder and the superfine mineral powder are combined, so that the anti-abrasion performance and the anti-chloride ion permeability of hardened cement slurry in concrete are effectively improved, the anti-abrasion strength of the obtained concrete is further improved, and the chloride ion diffusion coefficient is reduced.
4) The invention adopts the granite, basalt, quartzite and other broken stone aggregates with high dosage and good abrasion resistance, and can further improve the abrasion resistance strength and the chloride ion permeation resistance of the concrete while ensuring the mechanical property.
Compared with the prior art, the invention has the beneficial effects that:
1) according to the invention, by introducing the ceramic powder, the superfine mineral powder and the anti-abrasion crushed stone with a large mixing amount into the marine concrete, the marine concrete has excellent anti-abrasion performance and anti-chloride ion permeability while ensuring the mechanical property, and the service performance and durability of the marine concrete are effectively ensured.
2) The raw materials related by the invention have simple sources, and the preparation process is simple and convenient, and is suitable for popularization and application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the following examples, the cement used was P.O42.5 or P.II42.5 cement, and the specific surface areas were 348m each
2/kg and 329m
2Per kg; the ceramic powder is ceramic polishing powder generated in the grinding and polishing processes of the ceramic tile, and the specific surface area is 480m
2Per kg, 1.48 wt% CaO in the chemical composition, SiO
263.77 wt% of Al
2O
326.34 wt% of MgO, 2.53 wt% of SO
3The content was 2.44 wt%; the specific surface area of the adopted superfine mineral powder is 800m
2Per kg, having a chemical composition of 37.17 wt% CaO, SiO
229.62 wt% of Al
2O
316.87 wt%, MgO 9.99 wt%, SO
3The content was 3.38 wt%.
The crushed stone is granite or basalt crushed stone with 5-25 mm continuous gradation, and the crushing value is 4%; the river sand is medium coarse sand, the fineness modulus is 2.85, and the mud content is 0.4 wt%.
The water reducing rate of the adopted polycarboxylic acid high-efficiency water reducing agent is 25 percent.
In the following examples, GB/T50081-2002 Standard for testing mechanical properties of ordinary concrete is adopted to carry out a compressive strength test; carrying out an anti-impact abrasion strength test by adopting an air sand gun method in DL/T5150-2017 'Hydraulic concrete test regulations', wherein the air pressure is 0.6 MPa; the GB/T50082-2009 Standard test method for testing the long-term performance and the durability of the common concrete is adopted to carry out the chloride ion diffusion coefficient test.
Example 1
The preparation method of the marine anti-abrasion chloride corrosion-resistant concrete comprises the following steps:
1) weighing the raw materials according to the proportion, wherein the raw materials and the dosage are as follows: P.O42.5 cement 240kg/m
3100kg/m of superfine mineral powder
360kg/m of ceramic powder
31150kg/m granite gravel
3740kg/m river sand
3Polycarboxylic acidsHigh-efficiency water reducing agent 10kg/m
3132kg/m of water
3；
2) And (3) uniformly mixing the weighed P.O42.5 cement, superfine mineral powder, ceramic powder, granite broken stone and river sand, adding a polycarboxylic acid high-efficiency water reducing agent and water, and fully stirring to obtain the marine anti-abrasion chloride corrosion resistant concrete.
Example 2
The preparation method of the marine anti-abrasion chloride corrosion-resistant concrete comprises the following steps:
1) weighing the raw materials according to the proportion, wherein the raw materials and the dosage are as follows: P.O42.5 cement 210kg/m
3110kg/m of superfine mineral powder
370kg/m of ceramic powder
31150kg/m granite gravel
3785kg/m river sand
3Polycarboxylic acid high-efficiency water reducing agent 11kg/m
3124kg/m of water
3；
2) And (3) uniformly mixing the weighed P.O42.5 cement, superfine mineral powder, ceramic powder, granite broken stone and river sand, adding a polycarboxylic acid high-efficiency water reducing agent and water, and fully stirring to obtain the marine anti-abrasion chloride corrosion resistant concrete.
Example 3
The preparation method of the marine anti-abrasion chloride corrosion-resistant concrete comprises the following steps:
1) weighing the raw materials according to the proportion, wherein the raw materials and the dosage are as follows: P.II42.5 Cement 200kg/m
3120kg/m of superfine mineral powder
370kg/m of ceramic powder
31180kg/m of basalt crushed stone
3770kg/m river sand
310kg/m of polycarboxylic acid high-efficiency water reducing agent
3125kg/m of water
3；
2) And (3) uniformly mixing the weighed P.II42.5 cement, superfine mineral powder, ceramic powder, basalt broken stone and river sand, adding a polycarboxylic acid high-efficiency water reducing agent and water, and fully stirring to obtain the marine anti-abrasion chloride corrosion resistant concrete.
Comparative example 1
The preparation method of the marine concrete comprises the following steps:
1) weighing the raw materials according to the proportion, wherein the raw materials and the dosage are as follows: P.II42.5 cement 270kg/m
3170kg/m of mineral powder
3(specific surface area: 480 m)
2Kg), 1100kg/m of limestone macadam
3(5-25 continuous gradation, crushing value 15.4%) and 740kg/m river sand
39kg/m of polycarboxylic acid high-efficiency water reducing agent
3140kg/m of water
3；
2) And (3) uniformly mixing the weighed P.II42.5 cement, mineral powder, limestone broken stones and river sand, adding a polycarboxylic acid high-efficiency water reducing agent and water, and fully stirring to obtain the marine concrete.
Comparative example 2
The preparation method of the marine anti-abrasion chloride corrosion-resistant concrete comprises the following steps:
1) weighing the raw materials according to the proportion, wherein the raw materials and the dosage are as follows: P.O42.5 cement 230kg/m
3160kg/m of mineral powder
3(specific surface area: 480 m)
2/kg), 1150kg/m of granite macadam
3785kg/m river sand
38kg/m of polycarboxylic acid high-efficiency water reducing agent
3128kg/m of water
3；
2) And (3) uniformly mixing the weighed P.O42.5 cement, mineral powder, granite broken stone and river sand, adding a polycarboxylic acid high-efficiency water reducing agent and water, and fully stirring to obtain the marine anti-erosion and anti-chloride corrosion concrete.
Comparative example 3
The preparation method of the marine concrete comprises the following steps:
1) weighing the raw materials according to the proportion, wherein the raw materials and the dosage are as follows: P.II42.5 Cement 200kg/m
3120kg/m of superfine mineral powder
370kg/m of ceramic powder
31150kg/m limestone macadam
3(5-25 continuous gradation, crushing value 15.4%) and 740kg/m river sand
312kg/m of polycarboxylic acid high-efficiency water reducing agent
3128kg/m of water
3；
2) And (3) uniformly mixing the weighed P.II42.5 cement, superfine mineral powder, ceramic powder, limestone broken stone and river sand, adding a polycarboxylic acid high-efficiency water reducing agent and water, and fully stirring to obtain the marine concrete.
The marine concrete obtained in examples 1-3 and comparative examples 1-3 were subjected to mechanical property, abrasion resistance and erosion resistance tests, and the specific test results are shown in table 1.
TABLE 1 Performance test results of Marine concrete obtained in examples 1 to 3 and comparative examples 1 to 3
The above results show that: ceramic powder and superfine mineral powder are introduced into a cementing material system, so that the compressive strength and the chloride ion permeability resistance of concrete can be obviously improved, and the impact and abrasion resistance is improved to a certain extent; the granite macadam replaces limestone macadam, so that the impact and abrasion resistance strength of concrete can be obviously improved, and the compression strength is also improved to a certain extent; meanwhile, ceramic powder, superfine mineral powder and granite or basalt aggregate are introduced, so that the compressive strength, the impact and abrasion resistance strength and the chloride ion penetration resistance of the concrete can be obviously improved. The marine anti-abrasion chloride corrosion-resistant concrete prepared by the invention has excellent mechanical property, anti-abrasion property and anti-chloride ion permeability, and has a wide application prospect.
The above embodiments are merely examples for clearly illustrating the present invention and do not limit the present invention. Other variants and modifications of the invention, which are obvious to those skilled in the art and can be made on the basis of the above description, are not necessary or exhaustive for all embodiments, and are therefore within the scope of the invention.
Claims (9)
1. The marine anti-abrasion chloride salt erosion resistant concrete is characterized by comprising the following components in parts by weight: 180-260 kg/m cement
360-100 kg/m of ceramic powder
380-130 kg/m of superfine mineral powder
31000-1200 kg/m of crushed stone
3720-800 kg/m river sand
3And a water reducing agent of 7 to 11kg/m
3110 to 140kg/m of water
3。
2. The marine abrasion-resistant chloride corrosion-resistant concrete according to claim 1, wherein the cement is P.O42.5 or PII42.5 Cement having a specific surface area of 350m or less
2/kg。
3. The marine abrasion-resistant chloride corrosion-resistant concrete according to claim 1, wherein the specific surface area of the ceramic powder is 400-500 m
2Per kg; wherein, the chemical components and the mass percentage thereof comprise: 1-2% of CaO, and SiO
260～70％，Al
2O
320～30％，MgO2～3％，SO
32～3％。
4. The marine abrasion-resistant chloride corrosion-resistant concrete according to claim 1, wherein the specific surface area of the ultrafine mineral powder is 700-900 m
2Per kg; wherein, the chemical components and the mass percentage thereof comprise: 35-40% of CaO and SiO
225～30％，Al
2O
315～20％，MgO5～10％，SO
32～5％。
5. The marine abrasion-resistant chloride corrosion-resistant concrete according to claim 1, wherein the crushed stone is granite, basalt or quartzite crushed stone with 5-25 mm continuous gradation, and the crushing value is less than or equal to 5%.
6. The marine abrasion-resistant chloride corrosion-resistant concrete according to claim 1, wherein the river sand is medium coarse sand, the fineness modulus is 2.3-3.0, and the mud content is less than or equal to 0.5 wt%.
7. The marine abrasion-resistant chloride corrosion-resistant concrete according to claim 1, wherein the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent, and the water reducing rate is not less than 25%.
8. The marine abrasion-resistant chloride corrosion-resistant concrete according to claim 1, wherein the 28d compressive strength is not less than 65MPa, the 28d abrasion-resistant strength is not less than 0.8h/cm, and the 56d chloride diffusion coefficient is not more than 1.5 x 10
-12m
2/s。
9. The marine abrasion-resistant chloride corrosion-resistant concrete according to claim 1, applied to a marine concrete structure in a splash zone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911164863.1A CN110776292A (en) | 2019-11-25 | 2019-11-25 | Marine engineering anti-abrasion chloride-corrosion-resistant concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911164863.1A CN110776292A (en) | 2019-11-25 | 2019-11-25 | Marine engineering anti-abrasion chloride-corrosion-resistant concrete |
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| Publication Number | Publication Date |
|---|---|
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Family
ID=69392399
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|---|---|---|---|
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111592299A (en) * | 2020-05-15 | 2020-08-28 | 中建商品混凝土有限公司 | High-strength low-elasticity hydraulic anti-abrasion concrete and preparation method thereof |
| CN114349373A (en) * | 2022-01-19 | 2022-04-15 | 山东永正产业技术研究院有限公司 | Marine cement composition, preparation method thereof, marine cement and concrete |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101445351A (en) * | 2008-12-25 | 2009-06-03 | 戴春燕 | Marine C50 pumpcrete |
-
2019
- 2019-11-25 CN CN201911164863.1A patent/CN110776292A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101445351A (en) * | 2008-12-25 | 2009-06-03 | 戴春燕 | Marine C50 pumpcrete |
Non-Patent Citations (4)
| Title |
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| 余丽武: "《土木工程材料》", 31 July 2014, 余丽武 * |
| 储传英: "《三峡工程混凝土原材料研究》", 30 April 1999, 中国水利水电出版社 * |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111592299A (en) * | 2020-05-15 | 2020-08-28 | 中建商品混凝土有限公司 | High-strength low-elasticity hydraulic anti-abrasion concrete and preparation method thereof |
| CN114349373A (en) * | 2022-01-19 | 2022-04-15 | 山东永正产业技术研究院有限公司 | Marine cement composition, preparation method thereof, marine cement and concrete |
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Application publication date: 20200211 |
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