CN109467354B - Marine environment concrete crack repairing material and preparation method thereof - Google Patents
Marine environment concrete crack repairing material and preparation method thereof Download PDFInfo
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- CN109467354B CN109467354B CN201811113607.5A CN201811113607A CN109467354B CN 109467354 B CN109467354 B CN 109467354B CN 201811113607 A CN201811113607 A CN 201811113607A CN 109467354 B CN109467354 B CN 109467354B
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- 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
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- 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
- C04B2111/2015—Sulfate resistance
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- 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
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- 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
- C04B2111/29—Frost-thaw resistance
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- 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
- C04B2111/72—Repairing or restoring existing buildings or building materials
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Abstract
The invention discloses a marine environment concrete crack repairing material which is prepared from the following components in parts by weight: 30-50 parts of portland cement, 10-30 parts of desalted sea sand, 5-15 parts of waste sea fish, 10-30 parts of exoskeleton of crustacean, 4-10 parts of silica fume, 2-5 parts of rust inhibitor, 0.5-2 parts of early strength agent, 5-10 parts of expanding agent and 0.1-0.5 part of polypropylene fiber. The material is suitable for repairing the concrete cracks in the marine environment, and the marine environment concrete can be in service for a long time after being filled.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to a marine environment concrete crack repairing material and a preparation method thereof.
Background
The marine environment concrete refers to concrete which is used in the seashore, seawater or the environment affected by sea wind and is invaded by the seawater or the sea wind. Concrete in marine environments is inevitably corroded and cracked by internal and external factors. Once cracks are generated on the surface of concrete, the bearing capacity, impermeability and corrosion resistance of a concrete structure are necessarily reduced, and then a series of durability problems of carbonization of concrete materials, corrosion of reinforcing steel bars, sulfate corrosion and the like are caused, and the appearance of a building is also seriously influenced.
Although there are many kinds of paints for crack repair of concrete, there are few crack repair materials for marine environment concrete. In addition to the requirement for adhesion properties, the coating must have a high strength to ensure that the concrete structure is subjected to damage caused by the marine environment and changes in the concrete material during long service life. CN101955718A discloses a high-permeability epoxy resin primer, which is a two-component coating composed of a component A (modified epoxy resin) and a component B (modified curing agent), wherein the component A comprises the following components in parts by weight: 90-120 parts of epoxy resin, 20-80 parts of reactive diluent, 0.1-0.2 part of transition sub-nanometer metal oxide, 0-10 parts of dimethylamino methyl-phenol, 0-10 parts of zinc phosphate and 0-10 parts of tannic acid; the coating has the characteristics of strong permeability, low viscosity, large adhesive force and corrosion resistance, and can be applied to the surface of steel with low surface treatment and rust corrosion and water-based inorganic zinc. However, the transition group sub-nanometer metal oxide and the tannic acid are beneficial to the invasion of chloride ions, so when the transition group sub-nanometer metal oxide and the tannic acid are used in the marine environment, the corrosion of a concrete structure is accelerated, and the long-term service cannot be realized. Therefore, concrete crack repair materials having durability and capable of being used for a long time in a marine environment are lacking at present.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects of the prior art: the marine environment concrete crack repairing material is provided, and the marine environment concrete can be in service for a long time after being filled.
The technical solution of the invention is as follows: the marine environment concrete crack repairing material is prepared from the following components in parts by weight: 30-50 parts of portland cement, 10-30 parts of desalted sea sand, 5-15 parts of waste sea fish, 10-30 parts of exoskeleton of crustacean, 4-10 parts of silica fume, 2-5 parts of rust inhibitor, 0.5-2 parts of early strength agent, 5-10 parts of expanding agent and 0.1-0.5 part of polypropylene fiber.
Compared with the prior art, the marine environment concrete crack repairing material has the following remarkable advantages and beneficial effects:
the desalted sea sand and the abandoned sea fish are all from the seaside, so that the collection is convenient, and the cost is low. The exoskeleton of the waste marine fish and crustacean can be changed into valuable by treatment, the fish meal and bone meal obtained by treatment also contain abundant animal calcium and trace elements, the bonding force between a repairing material and cracks can be increased, the concrete filled in the cracks has good sealing property, chloride, sulfate and moisture are prevented from invading into the concrete, and the corrosion resistance is improved. Portland cement, silica fume, an early strength agent and an expanding agent are used as basic raw materials, and the base raw materials can be quickly filled into cracks to repair concrete; the rust inhibitor and the polypropylene fiber form a protective layer on the surface of the crack, so that the contact between chloride and sulfate in the ocean and the interior of the concrete can be blocked, the chloride and sulfate are prevented from permeating into the concrete, secondary cracking is avoided, and the rust resistance is improved. The repairing material prepared by the formula plays a synergistic role, is suitable for repairing concrete cracks in the marine environment, has good adhesion, compactness, corrosion resistance and durability, and can be used for a long time even under severe environments such as chloride pollution corrosion, sulfate corrosion, high humidity and the like after being filled with the repairing material.
Preferably, the marine environment concrete crack repairing material is prepared from the following components in parts by weight: 35-45 parts of portland cement, 15-25 parts of desalted sea sand, 5-10 parts of waste sea fish, 15-25 parts of exoskeleton of crustaceans, 4-6 parts of silica fume, 2-4 parts of rust inhibitor, 0.5-1.5 parts of early strength agent, 6-8 parts of expanding agent and 0.2-0.4 part of polypropylene fiber.
Preferably, the waste marine fish comprises fish bones, fish heads and fish flesh. The abandoned marine fish comes from the marine fish which leaks to the sea after fishing or does not return to the sea after getting rid of tide, the abandoned marine fish is a cheap and precious raw material, the precious points are the components and excellent performances of the marine fish, the marine fish lives in the seawater environment for a long time, the marine fish has flexibility and elasticity, the marine fish can play a role in buffering when encountering the huge violent impact of hard stones, the mild stamping is realized, and the repaired cracks can not be damaged by the impact of the hard substances, and the peripheries of the cracks can be firmer by falling down.
Preferably, the exoskeleton of the crustacean is a crab shell, a scorpion shell, a snail shell or a shrimp shell. The skeleton is hard and has high strength; belongs to marine animals and is completely suitable for marine environment; mineral components such as carbonate or phosphate, chitin and protein nitrogen-containing polysaccharides and arthropod protein can be contained without special extraction or additional addition. In research, the mineral components can obviously improve the compatibility of the crack in the marine environment concrete and the concrete structure, so that the integrity of the crack repairing material is obviously improved. If typhoon occurs, the concrete is impacted by seawater or impacted by hard stones, and the intensity of the repairing material is remarkably increased by the exoskeleton of the crustacean, so that the concrete with the crack repaired by the repairing material can resist the severe ocean environment.
Preferably, the exoskeleton of crustaceans is an exoskeleton of crustaceans living in the sea. The exoskeleton of crustaceans in the sea is hard and can be easily identified by the seaside after the tide is removed, so that the collection is convenient. And the crustacean in the sea is an organism adapted to the marine environment, can protect the soft tissue of the animal in the sea, and can still be normally used for a long time even if the exoskeleton dies, so that the exoskeleton of the crustacean living in the sea can better exert the effects of high strength, corrosion resistance and crack repair.
Preferably, the fineness modulus of the desalted sea sand is 1.5-2.5, and the specific surface area of the portland cement is 300-350 m2Per kg, the specific surface area of the silica fume is 20-28 m2In terms of/kg. The sea sand with the fineness enables the repairing coating to be mixed evenly and fill cracks easily; the Portland cement has good freezing resistance and wear resistance, so that the repair coating can adapt to a cold environment and can not freeze and crack when filled in a concrete crack; the silica fume can obviously improve the compression resistance, the folding resistance, the anti-permeability, the corrosion resistance, the impact resistance and the wear resistance of the repairing material.
Preferably, the marine environment concrete crack repairing material is repaired by the following method: adding water into the concrete crack repairing material in the marine environment, heating and stirring at 50-60 ℃, then coating the material on the crack, performing steam curing under the conditions of normal pressure and 80-100 ℃, and naturally drying to finish repairing.
Preferably, the preparation method of the marine environment concrete crack repair material is as follows:
1) collecting sea sand around the seaside, waste sea fish and exoskeleton of crustaceans;
2) putting the sea sand into water, centrifuging, washing for 3-5 times, and drying to obtain clean desalted sea sand;
3) soaking the waste sea fish in clear water, adding mucor, sealing at 15-25 ℃ and standing in the dark for 1-3 days to obtain fermented sea fish;
4) adding soda powder into the fermented marine fish, uniformly stirring, filtering, washing with ethanol for 3-5 times, and drying to obtain fish meal;
5) grinding the exoskeleton of the crustacean to the particle size of 0.1-5 mm, and heating at 50-80 ℃ for 2-4 h to obtain bone meal;
6) mixing clean desalted sea sand, fish meal and bone meal with Portland cement, silica fume, rust inhibitor, early strength agent, swelling agent and polypropylene fiber in certain proportion.
A preparation method of a marine environment concrete crack repairing material comprises the following steps:
1) collecting sea sand around the seaside, waste sea fish and exoskeleton of crustaceans;
2) putting the sea sand into water, centrifuging, washing for 3-5 times, and drying to obtain clean desalted sea sand;
3) soaking the waste sea fish in clear water, adding mucor, sealing at 15-25 ℃ and standing in the dark for 1-3 days to obtain fermented sea fish;
4) adding soda powder into the fermented marine fish, uniformly stirring, filtering, washing with ethanol for 3-5 times, and drying to obtain fish meal;
5) grinding the exoskeleton of the crustacean to the particle size of 0.1-5 mm, and heating at 50-80 ℃ for 2-4 h to obtain bone meal;
6) mixing clean desalted sea sand, fish meal and bone meal with Portland cement, silica fume, rust inhibitor, early strength agent, swelling agent and polypropylene fiber in certain proportion.
In the preparation method, the sea sand, the waste sea fish and the exoskeleton of the crustacean are all arranged at the seaside, so that the sea sand, the waste sea fish and the exoskeleton of the crustacean are conveniently collected together. The mucor is propagated on the waste marine fish to generate protease and lipase, the protein of the fish is decomposed into amino acid, the fat is decomposed into fatty acid, so that the fish bone and the fish head are not provided with fish meat at the periphery, and the fish bone is softened, so that abundant calcium and trace elements in the fish bone are released, and the subsequent collection is facilitated. Soda powder is added into the fermented marine fish, excessive enzyme and acid are removed, calcium carbonate is generated, and the processed fish meal contains calcium carbonate and animal trace elements such as phosphorus, iron and selenium, so that the bonding force between a repairing material and a crack can be increased, the concrete filled with the crack has good sealing property, chlorine salt, sulfate and moisture are prevented from invading the concrete, and the corrosion resistance is improved. Similarly, the bone meal is rich in animal calcium and trace elements such as phosphorus, iron and selenium, and can increase the adhesion and sealing property of the repairing material and prevent chloride, sulfate and moisture from invading into concrete. The combination can well play a synergistic role, and obviously enhance the adhesiveness, the sealing property, the corrosion resistance and the durability of the repairing material. The preparation method adopts cheap and waste raw materials of seaside, is convenient for preparation when seaside produces concrete, and has simple process and convenient operation.
Preferably, the weight ratio of the clear water in the step 3) to the waste marine fish is (3-5) to 1; the weight ratio of the mucor to the waste marine fish is (1-3) to 100.
Preferably, the weight ratio of the soda powder in the step 4) to the fermented sea fish is (1-3) to 10.
Detailed Description
The present invention will be described in further detail with reference to the following examples, but the present invention is not limited to the following examples.
The portland cement is one of cements having strength grades 325, 425, and 525.
The invention relates to a plurality of raw materials, including portland cement, silica fume, rust inhibitor, early strength agent, expanding agent and polypropylene fiber, wherein the raw materials are industrial raw materials and can be obtained by market purchase. Sea sand, waste sea fish, crab shells, scorpion shells, snail shells and shrimp shells are waste materials at seaside and are easy to collect.
In the invention, a plurality of parameters such as weight parts, specific surface area, temperature, time and particle size are shown, and the units (such as parts, DEG C and h) are marked after being uniformly limited at the upper limit, such as 30-50 parts and 300-350 m20.1-5 mm at 15-25 deg.C for 1-3 days. Of course, the unit marked after the upper limit value and the lower limit value can also be adopted, such as 30 to 50 parts and 300m2/kg～350m2Kg, 15-25 deg.C, 1-3 days, 0.1-5 mm. The two parameter ranges can be expressed in any way, in the embodiment, values are taken from the upper limit value, the lower limit value and the middle value of the parameter, and the numerical values are all in units.
The following examples are not provided to limit the scope of the present invention, nor are the steps described to limit the order of execution. Modifications of the invention which are obvious to those skilled in the art in view of the prior art are also within the scope of the invention as claimed.
Example one
The marine environment concrete crack repairing material is prepared from the following components in parts by weight: 30 parts of Portland cement, 10 parts of desalted sea sand, 5 parts of waste sea fish, 10 parts of crab shell, 4 parts of silica fume, 5 parts of rust inhibitor, 2 parts of early strength agent, 10 parts of expanding agent and 0.5 part of polypropylene fiber.
The waste marine fish comprises fish bone, fish head and fish meat. The fineness modulus of the desalted sea sand is 1.5, and the specific surface area of the portland cement is 300m2Kg, silica fume specific surface area of 20m2/kg
The preparation method of the marine environment concrete crack repairing material comprises the following steps:
1) collecting sea sand, waste sea fish and crab shells at the seaside;
2) putting the sea sand into water, centrifuging, washing for 3 times, and drying to obtain clean desalted sea sand;
3) soaking the waste sea fish in clear water, adding mucor, sealing at 15 deg.C and keeping in the dark for 3 days to obtain fermented sea fish; the weight ratio of the clear water to the waste marine fish is 3: 1; the weight ratio of the mucor to the waste marine fish is 1: 100;
4) adding soda powder into fermented marine fish, stirring, filtering, washing with ethanol for 3 times, and drying to obtain fish powder; the weight ratio of the sodium bicarbonate powder to the fermented sea fish is 1: 10;
5) grinding crab shell to particle size of 0.1mm, and heating at 50 deg.C for 2 hr to obtain bone powder;
6) mixing clean desalted sea sand, fish meal and bone meal with Portland cement, silica fume, rust inhibitor, early strength agent, swelling agent and polypropylene fiber in certain proportion.
The method for repairing the marine environment concrete crack repairing material comprises the following steps: adding water into the marine environment concrete crack repairing material, heating and stirring at 50 ℃, then coating the material on the crack, performing steam curing under the conditions of normal pressure and 80 ℃, and naturally airing to finish repairing.
Example two
The marine environment concrete crack repairing material is prepared from the following components in parts by weight: 50 parts of portland cement, 10 parts of desalted sea sand, 5 parts of waste sea fish, 30 parts of scorpion shells, 10 parts of silica fume, 5 parts of rust inhibitor, 0.5 part of early strength agent, 5 parts of expanding agent and 0.1 part of polypropylene fiber.
The waste marine fish comprises fish bone, fish head and fish meat. The fineness modulus of the desalted sea sand is 1.5-2.5, and the specific surface area of the portland cement is 300-350 m2Per kg, the specific surface area of the silica fume is 20-28 m2/kg
The preparation method of the marine environment concrete crack repairing material comprises the following steps:
1) collecting sea sand, waste sea fish and scorpion shells at seaside;
2) putting the sea sand into water, centrifuging, washing for 5 times, and drying to obtain clean desalted sea sand;
3) soaking the waste sea fish in clear water, adding mucor, sealing at 25 deg.C and keeping in the dark for 1 day to obtain fermented sea fish; the weight ratio of the clear water to the waste marine fish is 5: 1; the weight ratio of the mucor to the waste marine fish is 3: 100;
4) adding soda powder into fermented marine fish, stirring, filtering, washing with ethanol for 5 times, and drying to obtain fish powder; the weight ratio of the sodium bicarbonate powder to the fermented sea fish is 3: 10;
5) grinding Scorpio shell to particle size of 5mm, and heating at 80 deg.C for 4 hr to obtain bone powder;
6) mixing clean desalted sea sand, fish meal and bone meal with Portland cement, silica fume, rust inhibitor, early strength agent, swelling agent and polypropylene fiber in certain proportion.
The method for repairing the marine environment concrete crack repairing material comprises the following steps: adding water into the concrete crack repairing material in the marine environment, heating and stirring at 60 ℃, then coating the material on the crack, performing steam curing under the conditions of normal pressure and 100 ℃, and naturally drying to finish repairing.
EXAMPLE III
The marine environment concrete crack repairing material is prepared from the following components in parts by weight: 40 parts of portland cement, 20 parts of desalted sea sand, 10 parts of waste sea fish, 20 parts of shells, 7 parts of silica fume, 3 parts of rust inhibitor, 1 part of early strength agent, 8 parts of expanding agent and 0.2 part of polypropylene fiber.
The waste marine fish comprises fish bone, fish head and fish meat. The fineness modulus of the desalted sea sand is 2, and the specific surface area of the portland cement is 320m2Per kg, silica fume specific surface area of 25m2/kg
The preparation method of the marine environment concrete crack repairing material comprises the following steps:
1) collecting sea sand, waste sea fish and shells at the seaside;
2) putting the sea sand into water, centrifuging, washing for 4 times, and drying to obtain clean desalted sea sand;
3) soaking waste sea fish in clear water, adding mucor, sealing at 20 deg.C and keeping away from light for 2 days to obtain fermented sea fish; the weight ratio of the clear water to the waste marine fish is 4: 1; the weight ratio of the mucor to the waste marine fish is 2: 100;
4) adding soda powder into fermented marine fish, stirring, filtering, washing with ethanol for 4 times, and drying to obtain fish powder; the weight ratio of the sodium bicarbonate powder to the fermented sea fish is 2: 10;
5) grinding shell to particle size of 3mm, and heating at 60 deg.C for 3 hr to obtain bone powder;
6) mixing clean desalted sea sand, fish meal and bone meal with Portland cement, silica fume, rust inhibitor, early strength agent, swelling agent and polypropylene fiber in certain proportion.
The method for repairing the marine environment concrete crack repairing material comprises the following steps: adding water into the concrete crack repairing material in the marine environment, heating and stirring at 55 ℃, then coating the material on the crack, performing steam curing under the conditions of normal pressure and 90 ℃, and naturally drying to finish repairing.
Example four
The marine environment concrete crack repairing material is prepared from the following components in parts by weight: 35 parts of portland cement, 25 parts of desalted sea sand, 10 parts of waste sea fish, 25 parts of spiral shell, 4 parts of silica fume, 3 parts of rust inhibitor, 1 part of early strength agent, 7 parts of expanding agent and 0.3 part of polypropylene fiber.
The waste marine fish comprises fish bone, fish head and fish meat. The fineness modulus of the desalted sea sand is 1.7, and the specific surface area of the portland cement is 300m2Per kg, silica fume specific surface area of 25m2/kg
The preparation method of the marine environment concrete crack repairing material comprises the following steps:
1) collecting sea sand, waste sea fish and snail shells at the seaside;
2) putting the sea sand into water, centrifuging, washing for 3 times, and drying to obtain clean desalted sea sand;
3) soaking the waste sea fish in clear water, adding mucor, sealing at 15 deg.C and keeping in the dark for 3 days to obtain fermented sea fish; the weight ratio of the clear water to the waste marine fish is 3: 1; the weight ratio of the mucor to the waste marine fish is 2: 100;
4) adding soda powder into fermented marine fish, stirring, filtering, washing with ethanol for 3 times, and drying to obtain fish powder; the weight ratio of the sodium bicarbonate powder to the fermented sea fish is 1: 10;
5) grinding the snail shell to the particle size of 2mm, and heating at 70 ℃ for 3h to obtain bone meal;
6) mixing clean desalted sea sand, fish meal and bone meal with Portland cement, silica fume, rust inhibitor, early strength agent, swelling agent and polypropylene fiber in certain proportion.
The method for repairing the marine environment concrete crack repairing material comprises the following steps: adding water into the concrete crack repairing material in the marine environment, heating and stirring at 55 ℃, then coating the material on the crack, performing steam curing under the conditions of normal pressure and 85 ℃, and naturally drying to finish repairing.
EXAMPLE five
The marine environment concrete crack repairing material is prepared from the following components in parts by weight: 45 parts of Portland cement, 25 parts of desalted sea sand, 5 parts of waste sea fish, 20 parts of shrimp shell, 5 parts of silica fume, 4 parts of rust inhibitor, 1.2 parts of early strength agent, 6.5 parts of expanding agent and 0.4 part of polypropylene fiber.
The waste marine fish comprises fish bone, fish head and fish meat. The fineness modulus of the desalted sea sand is 1.5-2.5, and the specific surface area of the portland cement is 320m2Per kg, the specific surface area of the silica fume is 22m2/kg
The preparation method of the marine environment concrete crack repairing material comprises the following steps:
1) collecting sea sand, waste sea fish and shrimp shells around the sea;
2) putting the sea sand into water, centrifuging, washing for 4 times, and drying to obtain clean desalted sea sand;
3) soaking the waste sea fish in clear water, adding mucor, sealing at 18 deg.C and keeping in the dark for 1 day to obtain fermented sea fish; the weight ratio of the clear water to the waste marine fish is 4: 1; the weight ratio of the mucor to the waste marine fish is 3: 100;
4) adding soda powder into fermented marine fish, stirring, filtering, washing with ethanol for 5 times, and drying to obtain fish powder; the weight ratio of the sodium bicarbonate powder to the fermented sea fish is 1: 10;
5) grinding shrimp shell to particle size of 3mm, and heating at 70 deg.C for 2 hr to obtain bone powder;
6) mixing clean desalted sea sand, fish meal and bone meal with Portland cement, silica fume, rust inhibitor, early strength agent, swelling agent and polypropylene fiber in certain proportion.
The method for repairing the marine environment concrete crack repairing material comprises the following steps: adding water into the concrete crack repairing material in the marine environment, heating and stirring at 50 ℃, then coating the material on the crack, performing steam curing under the conditions of normal pressure and 90 ℃, and naturally drying to finish repairing.
Product testing
The marine environment concrete crack repairing material is filled in concrete cracks, and the results are shown in Table 1 by performing a quick freeze-thaw test on the concrete filled with the marine environment concrete crack repairing material according to a method of concrete frost resistance test in DL/T5150-2001 Hydraulic concrete test Specification.
TABLE 1 compression resistance test results
Filling the marine environment concrete crack repairing material in a concrete crack, and performing a quick freeze-thaw test on the concrete filled with the marine environment concrete crack repairing material by referring to a method of DL/T5150-; the comparative example is concrete not filled with the marine environment concrete crack repair material of the present invention, and the compressive strength was measured, and the results are shown in table 2.
TABLE 2 Freeze-thaw cycle Performance test results
In order to simulate the marine environment during application, the concrete filled with the marine environment concrete crack repairing material is added with 5% sodium chloride and 5% sodium sulfate during freeze-thaw cycle so as to test the performance of the marine environment concrete crack repairing material. The compressive strength of each group of test pieces is measured by a hydraulic pressure tester according to GB/T5008 l-2002 Standard of testing methods for mechanical properties of ordinary concrete, and the results are shown in tables 3 and 4.
TABLE 3 Freeze-thaw cycle plus 5% strength NaCl test results
Table 4 freeze-thaw cycle plus sodium sulfate concentration 5% test results
As can be seen from the results of the performance tests of the reinforced concrete shown in tables 1-4, the concrete filled with the marine environment concrete crack repairing material has good corrosion resistance, and can be in service for a long time in severe environments such as chloride pollution corrosion, sulfate corrosion, high humidity and the like.
The above are merely characteristic embodiments of the present invention, and do not limit the scope of the present invention in any way. All technical solutions formed by equivalent exchanges or equivalent substitutions fall within the protection scope of the present invention.
Claims (10)
1. The marine environment concrete crack repairing material is characterized by being prepared from the following components in parts by weight: 30-50 parts of portland cement, 10-30 parts of desalted sea sand, 5-15 parts of waste sea fish, 10-30 parts of exoskeleton of crustacean, 4-10 parts of silica fume, 2-5 parts of rust inhibitor, 0.5-2 parts of early strength agent, 5-10 parts of expanding agent and 0.1-0.5 part of polypropylene fiber;
the preparation method of the marine environment concrete crack repairing material comprises the following steps:
1) collecting sea sand around the seaside, waste sea fish and exoskeleton of crustaceans;
2) putting the sea sand into water, centrifuging, washing for 3-5 times, and drying to obtain clean desalted sea sand;
3) soaking the waste sea fish in clear water, adding mucor, sealing at 15-25 ℃ and standing in the dark for 1-3 days to obtain fermented sea fish;
4) adding soda powder into the fermented marine fish, uniformly stirring, filtering, washing with ethanol for 3-5 times, and drying to obtain fish meal;
5) grinding the exoskeleton of the crustacean to the particle size of 0.1-5 mm, and heating at 50-80 ℃ for 2-4 h to obtain bone meal;
6) mixing clean desalted sea sand, fish meal and bone meal with Portland cement, silica fume, rust inhibitor, early strength agent, swelling agent and polypropylene fiber in certain proportion.
2. The marine environment concrete crack repair material according to claim 1, characterized in that it is made from the following components in parts by weight: 35-45 parts of portland cement, 15-25 parts of desalted sea sand, 5-10 parts of waste sea fish, 15-25 parts of exoskeleton of crustaceans, 4-6 parts of silica fume, 2-4 parts of rust inhibitor, 0.5-1.5 parts of early strength agent, 6-8 parts of expanding agent and 0.2-0.4 part of polypropylene fiber.
3. The marine environment concrete crack repair material of claim 1, wherein the waste marine fish comprises fish bones, fish heads and fish flesh.
4. The marine environment concrete crack repair material of claim 1, wherein the exoskeleton of crustaceans is crab shells, scorpion shells, shell shells, snail shells or shrimp shells.
5. The marine environment concrete crack repair material of claim 1, wherein the exoskeleton of crustaceans is an exoskeleton of crustaceans living in the sea.
6. The marine environment concrete crack repair material as claimed in claim 1, wherein the fineness modulus of the desalinated sea sand is 1.5-2.5, and the specific surface area of the portland cement is 300-350 m2Kg, silica fume specific surface area of20～28m2/kg。
7. The marine environment concrete crack repair material according to any one of claims 1 to 6, characterized in that the repair method comprises the following steps: adding water into the concrete crack repairing material in the marine environment, heating and stirring at 50-60 ℃, then coating the material on the crack, performing steam curing under the conditions of normal pressure and 80-100 ℃, and naturally drying to finish repairing.
8. The preparation method of the marine environment concrete crack repair material based on claim 1 is characterized by comprising the following steps:
1) collecting sea sand around the seaside, waste sea fish and exoskeleton of crustaceans;
2) putting the sea sand into water, centrifuging, washing for 3-5 times, and drying to obtain clean desalted sea sand;
3) soaking the waste sea fish in clear water, adding mucor, sealing at 15-25 ℃ and standing in the dark for 1-3 days to obtain fermented sea fish;
4) adding soda powder into the fermented marine fish, uniformly stirring, filtering, washing with ethanol for 3-5 times, and drying to obtain fish meal;
5) grinding the exoskeleton of the crustacean to the particle size of 0.1-5 mm, and heating at 50-80 ℃ for 2-4 h to obtain bone meal;
6) mixing clean desalted sea sand, fish meal and bone meal with Portland cement, silica fume, rust inhibitor, early strength agent, swelling agent and polypropylene fiber in certain proportion.
9. The preparation method of the marine environment concrete crack repairing material according to claim 8, wherein the weight ratio of the clear water and the waste marine fish in the step 3) is (3-5) to 1; the weight ratio of the mucor to the waste marine fish is (1-3) to 100.
10. The preparation method of the marine environment concrete crack repair material according to claim 8, wherein the weight ratio of the baking soda powder in the step 4) to the fermented sea fish is (1-3) to 10.
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| WO2021109990A1 (en) * | 2019-12-02 | 2021-06-10 | 哈尔滨工程大学 | Silicate cement concrete and lightweight concrete oyster attachment bases and preparation methods |
| EP4071305A1 (en) * | 2019-12-02 | 2022-10-12 | Harbin Engineering University | Construction method for ecological riprap breakwater, induced cement-based coating and preparation method therefor |
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| WO2021109982A1 (en) * | 2019-12-02 | 2021-06-10 | 哈尔滨工程大学 | Concrete for inducing sessile organisms and promoting growth, oyster substrate and preparation method |
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