CN111018405B - Steel-polypropylene fiber artificial granite composite material added with foam particles and preparation method thereof - Google Patents
Steel-polypropylene fiber artificial granite composite material added with foam particles and preparation method thereof Download PDFInfo
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- CN111018405B CN111018405B CN201911273417.4A CN201911273417A CN111018405B CN 111018405 B CN111018405 B CN 111018405B CN 201911273417 A CN201911273417 A CN 201911273417A CN 111018405 B CN111018405 B CN 111018405B
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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
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/10—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C04B26/14—Polyepoxides
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- 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
- C04B2111/2038—Resistance against physical degradation
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- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
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- C04B2111/542—Artificial natural stone
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- 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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- 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
- C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
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Abstract
The invention discloses a steel-polypropylene fiber reinforced artificial granite composite material added with foam particles and a preparation method thereof. Weighing the composite binder and the filler according to the proportion requirement, and mixing the filler and the composite binder to obtain a mixture 2. And uniformly stirring the mixture 1 and the mixture 2 by using a stirrer, injecting the mixture into a steel mold coated with a release agent, fixing the steel mold on a vibration table, vibrating and compacting for molding, and curing at room temperature after demolding to obtain a finished product. The multi-phase interface of the composite material can be increased by adding the foam particles, and the intrinsic property of the foam particles has high damping, so that the energy generated by vibration can be effectively consumed, and the vibration resistance of the material is improved; the mechanical property and the vibration resistance of the material can be simultaneously improved by adding the steel fiber and the polypropylene fiber.
Description
Technical Field
The invention belongs to the technical field of composite materials, and particularly relates to a steel-polypropylene fiber reinforced artificial granite composite material added with foam particles and a preparation method thereof.
Background
The manufacturing industry is a national basic industry which reflects the comprehensive strength of the country, the top-end manufacturing industry of the world science and technology cannot open up a precise and ultra-precise machine tool, and the performance of a machine tool bed of a core basic part of the machine tool determines the machining precision of the machine tool. The traditional cast iron material as the ultra-precision machine tool body has insufficient vibration resistance, and the cast iron machine body generates a large amount of waste gas and waste slag in the casting process, so that the energy consumption is serious. The expert researches and adopts natural granite as the ultra-precise machine tool body aiming at the problem, but the natural granite is deformed when being wetted, so that the processing precision is influenced, and the state limits the exploitation of the natural granite to a certain extent.
In recent years, artificial granite is accepted by experts as an ultra-precise machine tool bed, kobaisi M A and the like research that resin concrete with different aggregates is applied to a machine tool and tests the performance of the machine tool, and the experimental result shows that the coefficient of thermal expansion of the resin concrete is lower; thermal deformation factors and heat sources are analyzed by Yinghua and the like, the thermal deformation coefficient of the steel fiber polymer concrete machine tool basic piece is tested, and the test result is compared with that of a cast iron machine tool basic piece, and the result shows that the thermal deformation of the steel fiber polymer concrete material is half of that of a cast iron material; the Teddy Jiangmen and the like measure the temperature distribution of the concrete bed body by using a temperature test system developed by LabVIEW and compare the temperature distribution with a prototype cast iron bed body to obtain the resin concrete bed body with more stable thermal state performance; sun Jie et al test the amplitude attenuation curve of the resin concrete material by free vibration to determine the damping characteristics of the material, and compare the damping characteristics with the vibration attenuation curve of gray cast iron, the results show that the logarithmic attenuation rate of the resin concrete is much greater than that of gray cast iron; the bed body of two different materials of granite and cast iron on a high-speed lathe is taken as a research object by people of Chen jade and the like, and the dynamic mode of the bed body during cutting is contrastively analyzed to obtain: the vibration mode frequency of the artificial granite lathe bed is far higher than that of a cast iron lathe bed, and the density of the artificial granite is only 1/3 of that of a cast iron material, so that the mass rigidity and the anti-seismic performance of the artificial granite lathe bed are far higher than those of the cast iron lathe bed. The resin concrete used as the ultra-precision machine tool body not only improves the vibration resistance and the corrosion resistance of the machine tool, but also reduces the casting energy consumption and the environmental pollution. The famous artificial granite lathe bed production enterprises at home and abroad, such as Stent in Switzerland, harper in the United states, emage in Germany, and Jinnano precision mechanical company Limited in Jinan, etc., but the mechanical property of the artificial granite material lathe bed is not enough, and the vibration resistance can be still further improved.
The mechanical property of the artificial granite can be greatly enhanced by adding the steel-polypropylene fibers, the steel fibers and the polypropylene fibers effectively inhibit the cracking of the artificial granite matrix, and the cracking threshold of the matrix is improved. The method is characterized in that foam particles are added into resin concrete to increase material damping, the foam particles are low in cost and obvious in damping improvement effect, the foam particles have a good application prospect when being added into a bed material of a resin concrete ultra-precision machine tool, the damping increase mechanism is that part of energy generated by vibration is consumed when passing through a resin foam particle interface, a resin aggregate interface and a resin fiber interface, and part of energy can be consumed by the foam particles, and the vibration resistance of the steel-polypropylene fiber reinforced artificial granite material is effectively improved by adding the foam particles. The invention aims to design a novel composite material lathe bed of an ultra-precision machine tool with high vibration resistance and high strength under the large background of the development of the manufacturing industry, and is of great help to the processing precision of the ultra-precision machine tool.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a steel-polypropylene fiber reinforced artificial granite composite material added with foam particles and a preparation method thereof, and the composite material is used for solving the defects of the mechanical property and the vibration resistance of the prior ultra-precise machine tool body by adding hybrid fibers (steel fibers and polypropylene fibers) and the foam particles and improving the processing property of the ultra-precise machine tool.
In order to solve the problems, the invention adopts the following technical scheme:
a steel-polypropylene fiber reinforced artificial granite composite material added with foam particles comprises aggregate, composite binder, steel-polypropylene fiber, filler and foam particles; wherein the aggregate accounts for 80 percent of the total mass of the composite material, the composite binder accounts for 13.2 percent of the total mass of the composite material, the steel-polypropylene fiber accounts for 1.1 to 1.3 percent of the total mass of the composite material, the filler accounts for 5.5 percent of the total mass of the composite material, and the foam particles account for 0.07 to 0.13 percent of the total mass of the composite material.
The aggregate is prepared from the Jinan Qinghua granite aggregates with different sizes, the aggregates are divided into 5 grades according to the particle size of the aggregates, and the 5 grades of the aggregates are graded as follows: the aggregate with the grain diameter of 0.00 mm-0.11 mm accounts for 13.75 percent of the total mass of the aggregate system; the aggregate with the grain diameter of 0.11 mm-0.52 mm accounts for 13.48 percent of the total mass of the aggregate system; the aggregate with the grain diameter of 0.52 mm-2.36 mm accounts for 25.75 percent of the total mass of the aggregate system; the aggregate with the grain diameter of 2.36 mm-4.75 mm accounts for 19.09 percent of the total mass of the aggregate system; the aggregate with the grain diameter of 4.75 mm-10.00 mm accounts for 27.93 percent of the total mass of the aggregate system.
The composite binder is a mixture of a binder, a curing agent and a diluent, wherein the binder is epoxy resin E44 and accounts for 57.69 percent of the total mass of the composite binder; the curing agent is 650 polyamide resin and accounts for 26.92 percent of the total mass of the adhesive; the diluent is C12-14 alkyl glycidyl ether and accounts for 15.39 percent of the total mass of the adhesive.
The steel-polypropylene fiber is a mixture of steel fiber and polypropylene fiber, wherein the steel fiber is steel fiber plated with copper on the surface, the diameter of the steel fiber is 500 mu m, and the length-diameter ratio of the steel fiber is 50-70; the diameter of the polypropylene fiber is 35 μm, the length is 12mm or 19mm, and the content ratio of the steel fiber to the polypropylene fiber is (26-32): 1.
The filler is a mixture of magnesium sulfate and mica powder, wherein the granularity of the magnesium sulfate is 60 meshes, and the content of the magnesium sulfate is more than 99 percent; the granularity of the mica powder is 1250 meshes, the water content is less than 0.1 percent, and the ratio of the magnesium sulfate to the content of the mica powder is 1.
The particle size of the foam particles is 2mm.
The preparation method of the steel-polypropylene fiber artificial granite composite material added with the foam particles comprises the following steps:
(1) cleaning aggregate, crushing, drying, screening the dried aggregate according to the particle size, and weighing the aggregate content with the required particle size according to the aggregate grading requirement;
(2) carrying out surface pretreatment on the steel fiber, and weighing the contents of the steel fiber and the polypropylene fiber according to the mixing proportion of the hybrid fiber;
(3) weighing foam particles according to a proportion;
(4) uniformly mixing and stirring the components (1), (2) and (3);
(5) weighing the epoxy resin binder, the curing agent and the diluent according to the proportion, and mixing and stirring uniformly;
(6) weighing the filler according to the proportion requirement;
(7) mixing and uniformly stirring the components (5) and (6);
(8) mixing and uniformly stirring the components (4) and (7);
(9) casting the stirred composite material in a mold coated with a release agent, and vibrating and molding the composite material by a vibrating table;
and (5) demolding the red (R), curing at room temperature and maintaining to obtain a test piece.
The pretreatment method in the step (2) comprises the following steps: mixing KH-550 with ethanol at a ratio, wherein the mass fraction of KH-550 is 5%, adjusting the pH value of the mixed solution to 4 with acetic acid solution, adding the cleaned and dried steel fiber into the mixed solution with the pH value of 4, heating in water bath to 60 ℃, keeping the temperature constant, and stirring for 1h. Washing with distilled water and ethanol, and oven drying.
In the step (9), the rotating speed of the stirrer is 45r/min, the stirring time is 5min, the vibration frequency of the vibration table is 100 HZ-125 HZ, the amplitude is 0.25 mm-0.8 mm, and the vibration time is 1h.
The invention has the beneficial effects that: the artificial granite composite material without the added foam particles has lower vibration resistance, the artificial granite composite material without the added fibers has lower mechanical property, and the vibration resistance and the mechanical property of the artificial granite composite material with the added foam particles and the steel-polypropylene fibers are obviously enhanced. If the foam particles are added, the multiphase interface of the composite material can be increased, the intrinsic property of the foam particles has high damping, the energy generated by vibration can be effectively consumed, and the vibration resistance of the material is improved; the addition of the steel fiber can improve the compression strength, the bending strength and the elastic modulus of the material; the addition of the polypropylene fiber can improve the splitting tensile property of the material and improve the cracking threshold of the material; the mechanical property of the material can also be improved by adding single fiber, but the mechanical property is not obvious. Therefore, the mechanical property and the vibration resistance of the material can be simultaneously improved by combining the advantages of the two fibers and adding the foam particles.
Compared with the artificial granite composite material without the steel-polypropylene fiber, the preparation method of the invention adopts the steel-polypropylene fiber reinforced artificial granite composite material added with the foam particles, the compression strength of the material is increased by 19-33%, and the bending strength is increased by 21-43%. Compared with the artificial granite composite material added with single steel fiber, the prepared steel-polypropylene fiber reinforced artificial granite composite material added with foam particles has the advantages that the compressive strength is increased by 10% -23%, and the bending strength is increased by 13% -33%; compared with the artificial granite composite material added with single polypropylene fiber, the compressive strength of the prepared steel-polypropylene fiber reinforced artificial granite composite material added with the foam particles is increased by 14-28%, and the bending strength is increased by 10-29%; compared with the steel-polypropylene fiber reinforced artificial granite composite material without the foam particles, the damping of the prepared steel-polypropylene fiber reinforced artificial granite composite material with the foam particles is increased by 8-21%.
Detailed Description
The present invention will be further described with reference to the following examples. It is to be understood that the following examples are illustrative only and are not intended to limit the scope of the invention, which is to be given numerous insubstantial modifications and adaptations by those skilled in the art based on the teachings set forth above.
Example 1
The preparation method of the steel-polypropylene fiber reinforced artificial granite composite material added with the foam particles in the embodiment is as follows:
(1) Cleaning aggregate, crushing, drying, screening the dried aggregate according to the particle size, weighing the aggregate content with the required particle size according to the aggregate grading requirement, and uniformly stirring; the aggregate is 10kg of the Jinan Qinghua granite aggregate, wherein:
1375g of aggregate with the thickness of 0.00-0.11 mm, which accounts for 13.75 percent of the total mass of the aggregate;
1348g of 0.11 mm-0.52 mm aggregate, accounting for 13.48 percent of the total mass of the aggregate;
2575g of 0.52-2.36 mm aggregate accounts for 25.75 percent of the total mass of the aggregate;
1909g of 2.36-4.75 mm aggregate accounting for 19.09 percent of the total mass of the aggregate;
2793g of 4.75-10.00 mm aggregate accounts for 27.93 percent of the total mass of the aggregate.
(2) Weighing 145g of steel fiber, soaking, cleaning and drying the steel fiber by using a KH-550 solution with the pH value of 4 and the mass fraction of 5%, heating to 60 ℃ in a water bath, keeping the temperature, stirring for 1h, cleaning by using distilled water and ethanol, and drying.
5g of polypropylene fiber is weighed.
(3) Weighing 1650g of the binder system according to the proportion requirement, wherein:
the epoxy resin E44 is 952g, which accounts for 57.69 percent of the total mass of the binder system;
650g of polyamide resin accounting for 26.92 percent of the total mass of the binder system;
the amount of the C12-14 alkyl glycidyl ether is 254g, which accounts for 15.39 percent of the total mass of the binder system.
(4) Weighing 687.5g of filler according to the mixture ratio, wherein: 229g of magnesium sulfate and 458.5g of mica powder.
(5) Weighing 9g of foam particles according to the proportioning requirement.
(6) And uniformly mixing the filler and the composite binder, adding the mixture into a mixture of an aggregate system, the steel-polypropylene fibers and the foam particles, uniformly mixing, injecting the mixture into a stirrer, and uniformly stirring, wherein the rotating speed of the stirrer is 45r/min, and the stirring time is 5min. And injecting the uniformly stirred composite material into a mold coated with a release agent, fixing the mold on a vibration table, and vibrating tightly, wherein the vibration frequency of the vibration table is 100 Hz-125 Hz, the amplitude is 0.25 mm-0.8 mm, and the vibration time is 1h.
(7) And (5) demolding, curing at room temperature for 24 hours, and curing for 10 days to form a finished product.
The steel-polypropylene fiber reinforced artificial granite added with the foam particles obtained by the preparation method and the aggregate proportion has the maximum compression strength of 159.2MPa, the maximum bending strength of 39.5MPa and the damping coefficient of 1.08 percent.
Example 2
The preparation method of the steel-polypropylene fiber reinforced artificial granite composite material added with the foam particles in the embodiment is as follows:
(1) Cleaning and crushing the aggregate, drying, screening the dried aggregate according to the particle size, weighing the aggregate content with the required particle size according to the aggregate grading requirement, and uniformly stirring; the aggregate is 10kg of the Jinan Qinghua granite aggregate, wherein:
1375g of aggregate with the thickness of 0.00-0.11 mm, which accounts for 13.75 percent of the total mass of the aggregate;
1348g of 0.11 mm-0.52 mm aggregate, accounting for 13.48 percent of the total mass of the aggregate;
2575g of 0.52-2.36 mm aggregate accounts for 25.75 percent of the total mass of the aggregate;
1909g of 2.36-4.75 mm aggregate accounting for 19.09 percent of the total mass of the aggregate;
2793g of 4.75-10.00 mm aggregate accounts for 27.93 percent of the total mass of the aggregate.
(2) Weighing 145g of steel fiber, soaking, cleaning and drying the steel fiber by using a KH-550 solution with the pH value of 4 and the mass fraction of 5%, heating to 60 ℃ in a water bath, keeping the temperature, stirring for 1h, cleaning by using distilled water and ethanol, and drying.
5g of polypropylene fiber is weighed.
(3) Weighing 1650g of the composite binder according to the proportion requirement, wherein:
the epoxy resin E44 is 952g, which accounts for 57.69 percent of the total mass of the composite binder;
650g of polyamide resin accounts for 444.92% of the total mass of the composite binder;
254g of C12-14 alkyl glycidyl ether accounts for 15.39 percent of the total mass of the composite binder.
(4) Weighing 687.5g of filler according to the mixture ratio, wherein: 229g of magnesium sulfate and 458.5g of mica powder.
(5) Weighing 12.5g of foam particles according to the proportioning requirement.
(6) Uniformly mixing the filler and the composite binder, adding the mixture into a mixture obtained by uniformly mixing an aggregate system, the steel-polypropylene fibers and the foam particles, injecting the mixture into a stirrer, and uniformly stirring the mixture, wherein the rotation speed of the stirrer is 45r/min, and the stirring time is 5min. And injecting the uniformly stirred composite material into a mold coated with a release agent, fixing the mold on a vibration table, and vibrating tightly, wherein the vibration frequency of the vibration table is 100 Hz-125 Hz, the amplitude is 0.25 mm-0.8 mm, and the vibration time is 1h.
(7) And (5) demolding, curing at room temperature for 24 hours, and curing for 10 days to form a finished product.
The steel-polypropylene fiber reinforced artificial granite added with the foam particles obtained by the preparation method and the aggregate proportion has the highest compressive strength of 160MPa, the highest bending strength of 40MPa and the damping coefficient of 1.19 percent.
Example 3
The preparation method of the steel-polypropylene fiber reinforced artificial granite composite material added with the foam particles in the embodiment is as follows:
(1) Cleaning and crushing the aggregate, drying, screening the dried aggregate according to the particle size, weighing the aggregate content with the required particle size according to the aggregate grading requirement, and uniformly stirring; the aggregate is 10kg of the Jinan Qinghua granite aggregate, wherein:
1375g of aggregate with the thickness of 0.00-0.11 mm, which accounts for 13.75 percent of the total mass of the aggregate;
1348g of 0.11 mm-0.52 mm aggregate, accounting for 13.48 percent of the total mass of the aggregate;
2575g of 0.52-2.36 mm aggregate accounts for 25.75 percent of the total mass of the aggregate;
1909g of 2.36-4.75 mm aggregate accounting for 19.09 percent of the total mass of the aggregate;
2793g of 4.75-10.00 mm aggregate accounts for 27.93 percent of the total mass of the aggregate.
(2) Weighing 145g of steel fiber, soaking, cleaning and drying the steel fiber by using a KH-550 solution with the pH value of 4 and the mass fraction of 5%, heating to 60 ℃ in a water bath, keeping the temperature, stirring for 1h, cleaning by using distilled water and ethanol, and drying.
5g of polypropylene fiber is weighed.
(3) Weighing 1650g of the composite binder according to the proportion requirement, wherein:
the epoxy resin E44 is 952g, which accounts for 57.69 percent of the total mass of the composite binder;
650g of polyamide resin accounts for 444.92% of the total mass of the composite binder;
254g of C12-14 alkyl glycidyl ether accounts for 15.39 percent of the total mass of the composite binder.
(4) Weighing 687.5g of filler according to the proportion requirement, wherein: 229g of magnesium sulfate and 458.5g of mica powder.
(5) Weighing 16g of foam particles according to the proportioning requirement.
(6) And uniformly mixing the filler and the composite binder, adding the mixture into a mixture of an aggregate system, the steel-polypropylene fibers and the foam particles, uniformly mixing, injecting the mixture into a stirrer, and uniformly stirring, wherein the rotating speed of the stirrer is 45r/min, and the stirring time is 5min. And injecting the uniformly stirred composite material into a mold coated with a release agent, fixing the mold on a vibration table, and vibrating the mold to be compact, wherein the vibration frequency of the vibration table is 100Hz to 125Hz, the amplitude is 0.25mm to 0.8mm, and the vibration time is 1h.
(7) And (5) demolding, curing at room temperature for 24 hours, and curing for 10 days to form a finished product.
The steel-polypropylene fiber reinforced artificial granite added with the foam particles obtained by the preparation method and the aggregate proportion has the highest compressive strength of 158.8MPa, the highest bending strength of 39.8MPa and the damping coefficient of 1.21 percent.
Comparative example 1
(1) Cleaning and crushing the aggregate, drying, screening the dried aggregate according to the particle size, weighing the aggregate content with the required particle size according to the aggregate grading requirement, and uniformly stirring; the aggregate is 10kg of the Jinan Qinghua granite aggregate, wherein:
1375g of aggregate with the thickness of 0.00-0.11 mm, accounting for 13.75 percent of the total mass of the aggregate;
1348g of 0.11-0.52 mm aggregate accounting for 13.48 percent of the total mass of the aggregate;
2575g of 0.52-2.36 mm aggregate accounts for 25.75 percent of the total mass of the aggregate;
1909g of 2.36-4.75 mm aggregate accounting for 19.09 percent of the total mass of the aggregate;
2793g of 4.75-10.00 mm aggregate accounts for 27.93 percent of the total mass of the aggregate.
(2) Weighing 145g of steel fiber according to the proportion requirement, soaking, cleaning and drying the steel fiber by using KH-550 solution with the pH value of 4 and the mass fraction of 5%, heating to 60 ℃ in water bath, keeping the temperature, stirring for 1h, cleaning by using distilled water and ethanol, and drying.
(3) 1650g of the composite binder is weighed according to the proportion requirement, wherein:
the epoxy resin E44 is 952g, which accounts for 57.69 percent of the total mass of the composite binder;
650g of polyamide resin accounts for 444.92% of the total mass of the composite binder;
254g of C12-14 alkyl glycidyl ether accounts for 15.39 percent of the total mass of the composite binder.
(4) Weighing 687.5g of filler according to the proportion requirement, wherein: 229g of magnesium sulfate and 458.5g of mica powder.
(5) Weighing 12.5g of foam particles according to the proportioning requirement.
(6) And uniformly mixing the filler and the composite binder, adding the mixture into a mixture obtained by uniformly mixing the aggregate system, the steel fibers and the foam particles, injecting the mixture into a stirrer, and uniformly stirring the mixture, wherein the rotating speed of the stirrer is 45r/min, and the stirring time is 5min. And injecting the uniformly stirred composite material into a mold coated with a release agent, fixing the mold on a vibration table, and vibrating tightly, wherein the vibration frequency of the vibration table is 100 Hz-125 Hz, the amplitude is 0.25 mm-0.8 mm, and the vibration time is 1h.
(7) And (5) demolding, curing at room temperature for 24 hours, and curing for 10 days to form a finished product.
The steel fiber reinforced artificial granite added with the foam particles obtained by the preparation method and the aggregate proportion has the compression strength of 130MPa, the bending strength of 30MPa and the damping coefficient of 1.185%.
Comparative example 1 and example 2, in which no polypropylene fiber was added, resulted in a decrease in compressive strength of 30MPa, a decrease in flexural strength of 10MPa, and a substantially unchanged damping coefficient.
Comparative example 2
(1) Cleaning and crushing the aggregate, drying, screening the dried aggregate according to the particle size, weighing the aggregate content with the required particle size according to the aggregate grading requirement, and uniformly stirring; the aggregate is 10kg of the stone aggregate of the Jinan Qinghua granite, wherein:
1375g of aggregate with the thickness of 0.00-0.11 mm, which accounts for 13.75 percent of the total mass of the aggregate;
1348g of 0.11 mm-0.52 mm aggregate, accounting for 13.48 percent of the total mass of the aggregate;
2575g of 0.52-2.36 mm aggregate accounts for 25.75 percent of the total mass of the aggregate;
1909g of 2.36-4.75 mm aggregate accounting for 19.09 percent of the total mass of the aggregate;
2793g of 4.75-10.00 mm aggregate accounts for 27.93 percent of the total mass of the aggregate.
(2) Weighing 5g of polypropylene fiber according to the proportion requirement;
(3) Weighing 1650g of the composite binder according to the proportion requirement, wherein:
the epoxy resin E44 is 952g, which accounts for 57.69 percent of the total mass of the composite binder;
650g of polyamide resin accounts for 444.92% of the total mass of the composite binder;
254g of C12-14 alkyl glycidyl ether accounts for 15.39 percent of the total mass of the composite binder.
(4) Weighing 687.5g of filler according to the proportion requirement, wherein: 229g of magnesium sulfate and 458.5g of mica powder.
(5) Weighing 12.5g of foam particles according to the proportioning requirement.
(6) Uniformly mixing the filler and the composite binder, adding the mixture into a mixture obtained by uniformly mixing the aggregate system, the polypropylene fiber and the foam particles, injecting the mixture into a stirrer, and uniformly stirring the mixture, wherein the rotation speed of the stirrer is 45r/min, and the stirring time is 5min. And injecting the uniformly stirred composite material into a mold coated with a release agent, fixing the mold on a vibration table, and vibrating tightly, wherein the vibration frequency of the vibration table is 100 Hz-125 Hz, the amplitude is 0.25 mm-0.8 mm, and the vibration time is 1h.
(7) And (5) demolding, curing at room temperature for 24 hours, and curing for 10 days to form a finished product.
The polypropylene fiber reinforced artificial granite added with the foam particles obtained by the preparation method and the aggregate proportion has the maximum compression strength of 125MPa, the maximum bending strength of 31MPa and the damping coefficient of 1.182 percent.
Comparative example 2 was compared with example 2 without adding steel fibers, resulting in a reduction in compressive strength of 35MPa, a reduction in flexural strength of 9MPa, and a substantially unchanged damping coefficient.
Comparative example 3
(1) Cleaning and crushing the aggregate, drying, screening the dried aggregate according to the particle size, weighing the aggregate content with the required particle size according to the aggregate grading requirement, and uniformly stirring; the aggregate is 10kg of the stone aggregate of the Jinan Qinghua granite, wherein:
1375g of aggregate with the thickness of 0.00-0.11 mm, which accounts for 13.75 percent of the total mass of the aggregate system;
1348g of 0.11-0.52 mm aggregate, accounting for 13.48 percent of the total mass of the aggregate system;
2575g of 0.52-2.36 mm aggregate accounts for 25.75 percent of the total mass of the aggregate system;
1909g of aggregate with the thickness of 2.36-4.75 mm accounts for 19.09% of the total mass of the aggregate system;
2793g of 4.75-10.00 mm aggregate accounts for 27.93 percent of the total mass of the aggregate system.
(2) 1650g of the binder system is weighed according to the proportion requirement, wherein:
the epoxy resin E44 is 952g, which accounts for 57.69 percent of the total mass of the binder system;
650g of polyamide resin accounting for 26.92 percent of the total mass of the binder system;
the amount of the C12-14 alkyl glycidyl ether is 254g, which accounts for 15.39 percent of the total mass of the binder system.
(3) Weighing 687.5g of filler according to the proportion requirement, wherein: 229g of magnesium sulfate and 458.5g of mica powder.
(4) Weighing 12.5g of foam particles according to the proportioning requirement.
(5) And uniformly mixing the filler system and the binder system, adding the mixture into the mixture obtained by uniformly mixing the aggregate system and the foam particles, injecting the mixture into a stirrer, and uniformly stirring the mixture, wherein the rotating speed of the stirrer is 45r/min, and the stirring time is 5min. And injecting the uniformly stirred composite material into a mold coated with a release agent, fixing the mold on a vibration table, and vibrating the mold to be compact, wherein the vibration frequency of the vibration table is 100Hz to 125Hz, the amplitude is 0.25mm to 0.8mm, and the vibration time is 1h.
(6) And (5) demolding, curing at room temperature for 24 hours, and curing for 10 days to form a finished product.
The composite material prepared by the preparation method and the aggregate proportion has the highest compressive strength of 120MPa, the highest bending strength of 28MPa and the damping coefficient of 1.178 percent.
Comparative example 3, which is compared with example 2 without adding steel fiber and polypropylene fiber, results in a reduction in compressive strength of 40Mpa, a reduction in flexural strength of 12Mpa, and a substantially unchanged damping coefficient.
Comparative example 4
(1) Cleaning aggregate, crushing, drying, screening the dried aggregate according to the particle size, weighing the aggregate content with the required particle size according to the aggregate grading requirement, and uniformly stirring; the aggregate is 10kg of the Jinan Qinghua granite aggregate, wherein:
1375g of aggregate with the thickness of 0.00-0.11 mm, which accounts for 13.75 percent of the total mass of an aggregate system;
1348g of 0.11-0.52 mm aggregate, accounting for 13.48 percent of the total mass of the aggregate system;
2575g of 0.52-2.36 mm aggregate accounts for 25.75 percent of the total mass of the aggregate system;
1909g of aggregate with the thickness of 2.36-4.75 mm accounts for 19.09% of the total mass of the aggregate system;
2793g of aggregate with the thickness of 4.75-10.00 mm accounts for 27.93 percent of the total mass of the aggregate system.
(2) Weighing 130g of steel fiber according to the proportion requirement, soaking the cleaned and dried steel fiber in KH-550 solution with the PH value of 4 and the mass fraction of 5%, heating the steel fiber to 60 ℃ in water bath, keeping the temperature constant, stirring the steel fiber for 1 hour, cleaning the steel fiber with distilled water and ethanol, and drying the steel fiber.
(3) Weighing 5g of polypropylene fiber according to the proportion requirement.
(4) Weighing 1650g of the binder system according to the proportion requirement, wherein:
the epoxy resin E44 is 952g, which accounts for 57.69 percent of the total mass of the binder system;
650g of polyamide resin accounting for 26.92 percent of the total mass of the binder system;
the amount of the C12-14 alkyl glycidyl ether is 254g, which accounts for 15.39 percent of the total mass of the binder system.
(5) Weighing 687.5g of filler according to the mixture ratio, wherein: 229g of magnesium sulfate and 458.5g of mica powder.
(6) Weighing 12.5g of foam particles according to the proportioning requirement.
(7) And uniformly mixing the filler system and the binder system, adding the mixture into a mixture of the aggregate system, the steel-polypropylene fibers and the foam particles, and injecting the mixture into a stirrer to stir uniformly, wherein the rotating speed of the stirrer is 45r/min, and the stirring time is 5min. And injecting the uniformly stirred composite material into a mold coated with a release agent, fixing the mold on a vibration table, and vibrating tightly, wherein the vibration frequency of the vibration table is 100 Hz-125 Hz, the amplitude is 0.25 mm-0.8 mm, and the vibration time is 1h.
(7) And (5) curing at room temperature for 24 hours after demolding, and curing for 10 days to form a finished product.
The steel-polypropylene fiber reinforced artificial granite prepared by the preparation method and the aggregate proportion has the compression strength up to 143MPa, the bending strength up to 34MPa and the damping coefficient up to 1.188%.
Comparative example 4 compared with example 2, the added steel fiber is reduced from 145g to 130g, and as a result, the compression strength is reduced by 17MPa, the bending strength is reduced by 6MPa, and the damping coefficient is basically unchanged.
Comparative example 5
(1) Cleaning aggregate, crushing, drying, screening the dried aggregate according to the particle size, weighing the aggregate content with the required particle size according to the aggregate grading requirement, and uniformly stirring; the aggregate is 10kg of the Jinan Qinghua granite aggregate, wherein:
1375g of aggregate with the thickness of 0.00-0.11 mm, which accounts for 13.75 percent of the total mass of an aggregate system;
1348g of 0.11-0.52 mm aggregate, accounting for 13.48 percent of the total mass of the aggregate system;
2575g of 0.52-2.36 mm aggregate accounts for 25.75 percent of the total mass of the aggregate system;
1909g of aggregate with the thickness of 2.36-4.75 mm, which accounts for 19.09 percent of the total mass of the aggregate system;
2793g of 4.75-10.00 mm aggregate accounts for 27.93 percent of the total mass of the aggregate system.
(3) Weighing 160g of steel fiber according to the proportion requirement, soaking, cleaning and drying the steel fiber by using KH-550 solution with the pH value of 4 and the mass fraction of 5%, heating to 60 ℃ in water bath, keeping the temperature, stirring for 1h, cleaning by using distilled water and ethanol, and drying.
(3) Weighing 5g of polypropylene fiber according to the proportion requirement.
(4) Weighing 1650g of the binder system according to the proportion requirement, wherein:
the epoxy resin E44 is 952g, which accounts for 57.69 percent of the total mass of the binder system;
650g of polyamide resin accounting for 26.92 percent of the total mass of the binder system;
the amount of the C12-14 alkyl glycidyl ether is 254g, which accounts for 15.39 percent of the total mass of the binder system.
(5) Weighing 687.5g of filler according to the proportion requirement, wherein: 229g of magnesium sulfate and 458.5g of mica powder.
(6) Weighing 12.5g of foam particles according to the proportioning requirement.
(7) And uniformly mixing the filler system and the binder system, adding the mixture into a mixture obtained by uniformly mixing the aggregate system, the steel-polypropylene fibers and the foam particles, injecting the mixture into a stirrer, and uniformly stirring the mixture, wherein the rotation speed of the stirrer is 45r/min, and the stirring time is 5min. And injecting the uniformly stirred composite material into a mold coated with a release agent, fixing the mold on a vibration table, and vibrating tightly, wherein the vibration frequency of the vibration table is 100 Hz-125 Hz, the amplitude is 0.25 mm-0.8 mm, and the vibration time is 1h.
(7) And (5) demolding, curing at room temperature for 24 hours, and curing for 10 days to form a finished product.
The steel-polypropylene fiber reinforced artificial granite prepared by the preparation method and the aggregate proportion has the maximum compression strength of 151MPa, the maximum bending strength of 38MPa and the damping coefficient of 1.189%.
The steel fiber added in the comparative example 5 is increased from 145g to 160g compared with the steel fiber added in the example 2, the compression strength is reduced by 9MPa, the bending strength is reduced by 2MPa, and the damping coefficient is basically unchanged.
Comparative example 6
(1) Cleaning and crushing the aggregate, drying, screening the dried aggregate according to the particle size, weighing the aggregate content with the required particle size according to the aggregate grading requirement, and uniformly stirring; the aggregate is 10kg of the Jinan Qinghua granite aggregate, wherein:
1375g of aggregate with the thickness of 0.00-0.11 mm, accounting for 13.75 percent of the total mass of the aggregate;
1348g of 0.11 mm-0.52 mm aggregate, accounting for 13.48 percent of the total mass of the aggregate;
2575g of 0.52-2.36 mm aggregate accounts for 25.75 percent of the total mass of the aggregate;
1909g of 2.36-4.75 mm aggregate accounting for 19.09 percent of the total mass of the aggregate;
2793g of 4.75-10.00 mm aggregate accounts for 27.93 percent of the total mass of the aggregate.
(2) Weighing 145g of steel fiber, soaking and cleaning the dried steel fiber by using a KH-550 solution with the PH value of 4 mass percent of 5 percent, heating the steel fiber to 60 ℃ in a water bath, keeping the temperature constant, stirring the steel fiber for 1 hour, cleaning the steel fiber by using distilled water and ethanol, and drying the steel fiber.
5g of polypropylene fiber is weighed.
(3) Weighing 1650g of the composite binder according to the proportion requirement, wherein:
the epoxy resin E44 is 952g, which accounts for 57.69 percent of the total mass of the composite binder;
650g of polyamide resin accounts for 444.92% of the total mass of the composite binder;
254g of C12-14 alkyl glycidyl ether accounts for 15.39 percent of the total mass of the composite binder.
(4) Weighing 687.5g of filler according to the mixture ratio, wherein: 229g of magnesium sulfate and 458.5g of mica powder.
(5) Uniformly mixing the filler and the composite binder, adding the mixture into a mixture obtained by uniformly mixing an aggregate system and the steel-polypropylene fibers, injecting the mixture into a stirrer, and uniformly stirring the mixture, wherein the rotation speed of the stirrer is 45r/min, and the stirring time is 5min. And injecting the uniformly stirred composite material into a mold coated with a release agent, fixing the mold on a vibration table, and vibrating tightly, wherein the vibration frequency of the vibration table is 100 Hz-125 Hz, the amplitude is 0.25 mm-0.8 mm, and the vibration time is 1h.
(6) And (5) demolding, curing at room temperature for 24 hours, and curing for 10 days to form a finished product.
The steel-polypropylene fiber reinforced artificial granite added with the foam particles obtained by the preparation method and the aggregate proportion has the highest compressive strength of 158.6MPa, the highest bending strength of 39MPa and the damping coefficient of 0.1 percent.
Comparative example 6 was compared with example 2 without adding foam particles, and as a result, the compression strength and the bending strength were substantially unchanged, and the damping coefficient was reduced by 16%.
Compared with the example 2, the comparative example 1 does not add the polypropylene fiber, and the compression resistance and the bending resistance of the composite material are reduced; comparative example 2 no steel fiber is added, and the compression resistance and the bending resistance of the composite material are reduced; comparative example 3 no two fibers are added, and the compression resistance and the bending resistance of the composite material are reduced; comparative example 4 the content of the added steel fiber is reduced from 145g to 130g, and the compression resistance and the bending resistance of the composite material are reduced; the content of the steel fiber added in the comparative example 5 is increased from 145g to 160g, and the compression resistance and the bending resistance of the composite material are reduced; comparative example 6, with no foam particles added, the damping performance decreased.
The foregoing shows and describes the general principles and features of the present invention, together with the advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. The steel-polypropylene fiber artificial granite composite material added with the foam particles is characterized in that: the composite material consists of aggregate, a composite binder, steel-polypropylene fibers, a filler and foam particles; wherein the aggregate accounts for 80 percent of the total mass of the composite material, the composite binder accounts for 13.2 percent of the total mass of the composite material, the steel-polypropylene fiber accounts for 1.1 to 1.3 percent of the total mass of the composite material, the filler accounts for 5.5 percent of the total mass of the composite material, and the foam particles account for 0.07 to 0.13 percent of the total mass of the composite material; the particle size of the foam particles is 2mm;
the aggregate is prepared from the Jinan blue-and-white granite aggregates with different sizes, the aggregates are divided into 5 grades according to the particle size of the aggregates, and the 5 grades of the aggregates are graded as follows: the aggregate with the grain diameter of 0.00 mm-0.11 mm accounts for 13.75 percent of the total mass of the aggregate; the aggregate with the grain diameter of 0.11 mm-0.52 mm accounts for 13.48 percent of the total mass of the aggregate; the aggregate with the grain diameter of 0.52 mm-2.36 mm accounts for 25.75 percent of the total mass of the aggregate; the aggregate with the grain diameter of 2.36 mm-4.75 mm accounts for 19.09 percent of the total mass of the aggregate; the aggregate with the grain diameter of 4.75 mm-10.00 mm accounts for 27.93 percent of the total mass of the aggregate;
the composite adhesive is a mixture of an adhesive, a curing agent and a diluent, wherein the adhesive is epoxy resin E44, the curing agent is 650 polyamide resin, and the diluent is C12-14 alkyl glycidyl ether; the epoxy resin E44 accounts for 57.69% of the total mass of the adhesive system, and the 650 polyamide resin accounts for 26.92% of the total mass of the adhesive system; the C12-14 alkyl glycidyl ether accounts for 15.39 percent of the total mass of the binder system;
the steel fiber is pretreated as follows: mixing KH-550 with ethanol in proportion, adjusting the mass fraction of KH-550 to 5%, adjusting the pH value of the mixed solution to 4 with an acetic acid solution, putting the cleaned and dried steel fiber into the mixed solution with the pH value of 4, heating in a water bath to 60 ℃, keeping the temperature and stirring for 1h, cleaning with distilled water and ethanol, and drying.
2. The foam particle-added steel-polypropylene fiber artificial granite composite material of claim 1, characterized in that: the steel-polypropylene fiber is a mixture of steel fiber and polypropylene fiber, wherein the steel fiber is surface copper-plated steel fiber, the diameter of the steel fiber is 500 micrometers, and the length-diameter ratio of the steel fiber is 50-70; the diameter of the polypropylene fiber is 35 μm, the length is 12mm or 19mm, and the content ratio of the steel fiber to the polypropylene fiber is (26-32): 1.
3. The foam particle-added steel-polypropylene fiber artificial granite composite material of claim 1, characterized in that: the filler is a mixture of magnesium sulfate and mica powder, wherein the granularity of the magnesium sulfate is 60 meshes, and the content of the magnesium sulfate is more than 99 percent; the granularity of the mica powder is 1250 meshes, the water content is less than 0.1 percent, and the ratio of the magnesium sulfate to the content of the mica powder is 1.
4. The method for preparing the steel-polypropylene fiber artificial granite composite material added with the foam particles as claimed in any one of claims 1 to 3, which is characterized by comprising the following steps:
(1) cleaning aggregate, crushing, drying, screening the dried aggregate according to the particle size, and weighing the aggregate content with the required particle size according to the aggregate grading requirement;
(2) weighing steel-polypropylene fibers according to a proportion, wherein the steel-polypropylene fibers are a mixture of the steel fibers and the polypropylene fibers, performing surface pretreatment on the steel fibers, and weighing the contents of the steel fibers and the polypropylene fibers according to the mixing proportion of the hybrid fibers;
(3) weighing foam particles according to a proportion;
(4) uniformly mixing and stirring the components (1), (2) and (3);
(5) weighing the composite binder according to the proportion, and uniformly mixing and stirring;
(6) weighing the filler according to the proportion requirement;
(7) mixing and stirring uniformly the (5) and the (6);
(8) mixing and uniformly stirring the components (4) and (7);
(9) casting the stirred composite material in a mold coated with a release agent, and performing vibration molding by using a vibration table;
and (5) demolding the red (R), curing at room temperature and maintaining to obtain a test piece.
5. The method for preparing the artificial granite composite material with steel-polypropylene fiber added with foam particles as claimed in claim 4, wherein: in the step (9), the rotating speed of the stirrer is 45r/min, the stirring time is 5min, the vibration frequency of the vibration table is 100 HZ-125 HZ, the amplitude is 0.25 mm-0.8 mm, and the vibration time is 1h.
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