CN112608096A - High-fracture-resistance wear-resistance hybrid fiber concrete and preparation method thereof - Google Patents
High-fracture-resistance wear-resistance hybrid fiber concrete and preparation method thereof Download PDFInfo
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- CN112608096A CN112608096A CN202011410372.3A CN202011410372A CN112608096A CN 112608096 A CN112608096 A CN 112608096A CN 202011410372 A CN202011410372 A CN 202011410372A CN 112608096 A CN112608096 A CN 112608096A
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- 239000000835 fiber Substances 0.000 title claims abstract description 171
- 239000004567 concrete Substances 0.000 title claims abstract description 74
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 68
- 239000010959 steel Substances 0.000 claims abstract description 68
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 34
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 34
- 239000004576 sand Substances 0.000 claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000000654 additive Substances 0.000 claims abstract description 17
- 230000000996 additive effect Effects 0.000 claims abstract description 17
- 239000010881 fly ash Substances 0.000 claims abstract description 15
- 238000002156 mixing Methods 0.000 claims abstract description 15
- 239000004568 cement Substances 0.000 claims abstract description 13
- 239000004575 stone Substances 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 24
- 238000003756 stirring Methods 0.000 claims description 22
- 239000000203 mixture Substances 0.000 claims description 15
- 239000000843 powder Substances 0.000 claims description 6
- 238000005299 abrasion Methods 0.000 claims description 5
- 238000005452 bending Methods 0.000 claims description 5
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 4
- XDLMVUHYZWKMMD-UHFFFAOYSA-N 3-trimethoxysilylpropyl 2-methylprop-2-enoate Chemical compound CO[Si](OC)(OC)CCCOC(=O)C(C)=C XDLMVUHYZWKMMD-UHFFFAOYSA-N 0.000 claims description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 2
- 239000006004 Quartz sand Substances 0.000 claims description 2
- 239000008367 deionised water Substances 0.000 claims description 2
- 229910021641 deionized water Inorganic materials 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- 238000003760 magnetic stirring Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 238000002791 soaking Methods 0.000 claims description 2
- 238000005303 weighing Methods 0.000 claims description 2
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract description 2
- 239000006185 dispersion Substances 0.000 abstract description 2
- 239000012615 aggregate Substances 0.000 description 6
- 239000003638 chemical reducing agent Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 239000011398 Portland cement Substances 0.000 description 5
- 239000002253 acid Substances 0.000 description 5
- 238000011049 filling Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000007655 standard test method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- HQYALQRYBUJWDH-UHFFFAOYSA-N trimethoxy(propyl)silane Chemical compound CCC[Si](OC)(OC)OC HQYALQRYBUJWDH-UHFFFAOYSA-N 0.000 description 1
Classifications
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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
-
- 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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/38—Fibrous materials; Whiskers
- C04B14/48—Metal
-
- 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
- C04B16/00—Use of organic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of organic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B16/04—Macromolecular compounds
- C04B16/06—Macromolecular compounds fibrous
- C04B16/0616—Macromolecular compounds fibrous from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B16/0641—Polyvinylalcohols; Polyvinylacetates
-
- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/023—Chemical treatment
-
- 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)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Civil Engineering (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to a high-fracture-resistance wear-resistance hybrid fiber concrete and a preparation method thereof, wherein the high-fracture-resistance wear-resistance hybrid fiber concrete comprises the following raw materials in parts by weight: 300-400 parts of cement, 0-100 parts of fly ash, 600-850 parts of sand, 1000-1400 parts of broken stone, 100-200 parts of water, 30-150 parts of modified steel fiber, 2-10 parts of polyvinyl alcohol fiber and 3-20 parts of additive. The invention improves the dispersion and cohesiveness of fiber in concrete, controls the mutual mixing proportion and mixing amount of steel fiber and polyvinyl alcohol fiber, and improves the anti-breaking and wear-resisting properties of concrete. The concrete prepared by the invention has good workability and simple preparation process, is beneficial to large-scale construction, and can be widely applied to concrete structures in the fields of civil engineering, municipal administration, traffic and the like.
Description
Technical Field
The invention relates to a hybrid fiber concrete with high breaking and wear resistance and a preparation method thereof, belonging to the technical field of building materials.
Background
The fiber concrete is a cement-based mixed material prepared by using concrete as a matrix and doping other fibers. Different fibers doped in concrete can improve the tensile property, the folding resistance, the impact resistance, the wear resistance and the like of the concrete, wherein the high-elasticity-modulus high-strength fibers can improve the strength of the concrete, and the low-elasticity-modulus low-strength fibers can reduce and inhibit the cracking of the concrete. However, a single fiber material cannot meet the requirement of improving various properties of concrete, so that a hybrid fiber concrete in which two or more fibers with different characteristics are blended with each other in a reasonable ratio has been produced. The hybrid fiber concrete can enable fibers with different excellent characteristics to act synergistically, and the effect is exerted at different levels and stress stages to enhance the performance of the concrete. At present, the concrete is easy to agglomerate after being doped with steel fibers, which is a great difficulty in the current engineering application and seriously influences the practical production application.
Disclosure of Invention
The invention aims to provide high-fracture-resistance wear-resistance hybrid fiber concrete and a preparation method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme: the high-fracture-resistance wear-resistance hybrid fiber concrete comprises the following components in parts by weight: 300-400 parts of cement, 0-100 parts of fly ash, 600-850 parts of sand, 1000-1400 parts of broken stone, 100-200 parts of water, 32-160 parts of hybrid fiber and 3-20 parts of additive.
Further, the hybrid fiber is composed of 30-150 parts of modified steel fiber and 2-10 parts of polyvinyl alcohol fiber.
Furthermore, the modified steel fiber is copper-plated steel fiber, the shape of the copper-plated steel fiber comprises one or a combination of several of linear type, corrugated type and end hook type, the length of the copper-plated steel fiber is 10-20 mm, the diameter of the copper-plated steel fiber is 0.2-0.4 mm, the ultimate elongation is less than or equal to 25%, and the tensile strength is greater than or equal to 2500 Mpa.
Furthermore, the volume of the steel fiber in the hybrid fiber concrete is 0.3-3%.
Furthermore, the length of the polyvinyl alcohol fiber is 20-30 mm, the diameter is 40-60 mu m, the ultimate elongation is 6-8%, and the tensile strength is more than or equal to 1500 MPa.
Furthermore, the volume ratio of the polyvinyl alcohol fiber in the hybrid fiber concrete is 0.1-0.5%.
Furthermore, the sand is one or a combination of more of river sand, machine-made sand and quartz sand, and the fineness modulus of the sand is 2.3-2.9.
A preparation method of a high-fracture-resistance wear-resistance hybrid fiber concrete comprises the following steps:
1) the preparation method of the modified steel fiber comprises the following steps:
mixing 5-10 parts by weight of deionized water, 50-100 parts by weight of absolute ethyl alcohol and 5-10 parts by weight of silane coupling agent, putting the mixture into a magnetic stirring pot, stirring for 30-60 min, adding 1 part by weight of steel fiber, soaking for 1-2 hours, taking out, putting the mixture into a 40 ℃ oven, and drying to obtain modified steel fiber;
2) weighing the raw materials according to the weight ratio of claim 1, adding the weighed sand, broken stone, premixed modified steel fiber and polyvinyl alcohol fiber into a stirrer, stirring for 30-60 s, adding cement and fly ash, and continuously stirring for 30-120 s to uniformly mix the fiber, the powder and the aggregate;
3) and finally, fully mixing the admixture with water, adding the mixture into a stirrer, and stirring for 100-200 s to obtain the fiber concrete with the steel fibers and the polyvinyl alcohol fibers mixed.
Further, the silane coupling agent is one or a combination of more of gamma-aminotriethylsilane (KH 550 for short), gamma- (2, 3-glycidoxy) propyltrimethoxysilane (KH 560 for short), gamma- (beta-aminoethyl) aminopropyltrimethoxysilane (KH 791 for short) and gamma-methacryloxypropyltrimethoxysilane (KH 570 for short).
Compared with the prior art, the invention has the beneficial effects that:
the invention utilizes the high strength and high tensile strength of the steel fiber in the hybrid fiber concrete and the high toughness and good bonding property of the polyvinyl alcohol fiber, and obviously improves the fracture resistance and wear resistance of the concrete by controlling the mixing amount of the two fibers; after the polyvinyl alcohol fibers are added into the concrete, a large number of hydration products are adhered to the surfaces of the polyvinyl alcohol fibers, the polyvinyl alcohol fibers and the concrete matrix have good adhesive property, the defect that the adhesive property with the concrete is poor in the early stage when only the steel fibers are added is overcome, and the defect that the anti-bending property is poor in the later stage when only the polyvinyl alcohol fibers are added is overcome due to the high-strength and high-tensile property of the steel fibers.
According to the invention, the steel fiber is modified, so that the dispersibility in concrete is improved, the binding power of the modified steel fiber and a gelling system is increased, and the aggregate and the fiber are stirred for pre-dispersion in the feeding process, so that the spheroidization effect of the fiber and the concrete in mixing is avoided, and the concrete has good workability;
the invention has simple preparation process and low cost, is beneficial to mass construction, and can be widely applied to concrete structures in the fields of civil engineering, municipal administration, traffic and the like.
Detailed Description
The technical solution of the present invention is further described in detail by the following examples, which are illustrative but not limiting of the present invention.
Example 1
The high-fracture-resistance wear-resistance hybrid fiber concrete comprises the following raw materials in parts by weight: 310 parts of P & O general portland cement, 30 parts of fly ash, 700 parts of machine-made sand, 1300 parts of crushed stone, 130 parts of water, 40 parts of modified steel fiber, 6 parts of polyvinyl alcohol fiber and 6 parts of additive. The additive is a high-efficiency polycarboxylic acid water reducing agent.
Wherein the steel fiber is a linear copper-plated steel fiber, the length of the steel fiber is 10mm, the diameter of the steel fiber is 0.2mm, and the volume of the steel fiber in the hybrid fiber concrete is 0.5%.
Wherein the length of the polyvinyl alcohol fiber is 20mm, the diameter is 45 μm, and the volume percentage of the polyvinyl alcohol fiber in the hybrid fiber concrete is 0.5%.
Firstly, adding sand and gravel into a stirrer, simultaneously adding premixed modified steel fiber and polyvinyl alcohol fiber, stirring for 30s, then adding cement and fly ash, and continuously stirring for 90s to uniformly mix the fiber, powder and aggregate. And finally, fully mixing the additive and water, adding the mixture into a stirrer, and stirring for 120s to obtain the fiber concrete with the steel fibers and the polyvinyl alcohol fibers mixed. And (4) standard maintenance is carried out after the die filling and forming, and the 150X 150mm test piece is taken out for a wear-resisting test after the test piece reaches the age. After the test piece with the size of 150X 600mm reaches the age period, the test piece is taken out for the flexural test.
Example 2
The high-fracture-resistance wear-resistance hybrid fiber concrete comprises the following raw materials in parts by weight: 310 parts of P & O general portland cement, 30 parts of fly ash, 700 parts of machine-made sand, 1300 parts of crushed stone, 130 parts of water, 60 parts of modified steel fiber, 4 parts of polyvinyl alcohol fiber and 6 parts of additive. The additive is a high-efficiency polycarboxylic acid water reducing agent.
Wherein the steel fiber is a linear copper-plated steel fiber, the length of the steel fiber is 10mm, the diameter of the steel fiber is 0.2mm, and the volume of the steel fiber in the hybrid fiber concrete is 0.7%.
Wherein the length of the polyvinyl alcohol fiber is 20mm, the diameter is 45 μm, and the volume percentage of the polyvinyl alcohol fiber in the hybrid fiber concrete is 0.3%.
Firstly, adding sand and gravel into a stirrer, simultaneously adding premixed modified steel fiber and polyvinyl alcohol fiber, stirring for 40s, then adding cement and fly ash, continuously stirring for 100s, and uniformly mixing the fiber, powder and aggregate. And finally, fully mixing the additive and water, adding the mixture into a stirrer, and stirring for 140s to obtain the fiber concrete with the steel fibers and the polyvinyl alcohol fibers mixed. And (4) standard maintenance is carried out after the die filling and forming, and the 150X 150mm test piece is taken out for a wear-resisting test after the test piece reaches the age. After the test piece with the size of 150X 600mm reaches the age period, the test piece is taken out for the flexural test.
Example 3
The high-fracture-resistance wear-resistance hybrid fiber concrete comprises the following raw materials in parts by weight: 310 parts of P & O general portland cement, 30 parts of fly ash, 700 parts of machine-made sand, 1300 parts of crushed stone, 130 parts of water, 80 parts of modified steel fiber, 2 parts of polyvinyl alcohol fiber and 6 parts of additive. The additive is a high-efficiency polycarboxylic acid water reducing agent.
Wherein the steel fiber is a linear copper-plated steel fiber, the length of the steel fiber is 10mm, the diameter of the steel fiber is 0.2mm, and the volume of the steel fiber in the hybrid fiber concrete is 0.9%.
Wherein the length of the polyvinyl alcohol fiber is 20mm, the diameter is 45 μm, and the volume percentage of the polyvinyl alcohol fiber in the hybrid fiber concrete is 0.1%.
Firstly, adding sand and gravel into a stirrer, simultaneously adding premixed modified steel fiber and polyvinyl alcohol fiber, stirring for 60s, then adding cement and fly ash, continuously stirring for 120s, and uniformly mixing the fiber, powder and aggregate. And finally, fully mixing the additive and water, adding the mixture into a stirrer, and stirring for 150 seconds to obtain the fiber concrete with the steel fibers and the polyvinyl alcohol fibers mixed. And (4) standard maintenance is carried out after the die filling and forming, and the 150X 150mm test piece is taken out for a wear-resisting test after the test piece reaches the age. After the test piece with the size of 150X 600mm reaches the age period, the test piece is taken out for the flexural test.
Comparative example 1
The high-breaking-resistance wear-resistant concrete without mixed fibers comprises the following raw materials in parts by weight: 310 parts of P & O general portland cement, 30 parts of fly ash, 700 parts of machine-made sand, 1300 parts of broken stone, 130 parts of water and 6 parts of an additive. The additive is a high-efficiency polycarboxylic acid water reducing agent.
And sequentially adding the sand, the broken stone, the cement and the fly ash into a stirrer, stirring for 30s, fully mixing the water reducing agent and the water, and adding the mixture into the stirrer to stir for 120 s. And (4) standard maintenance is carried out after the die filling and forming, and the 150X 150mm test piece is taken out for a wear-resisting test after the test piece reaches the age. After the test piece with the size of 150X 600mm reaches the age period, the test piece is taken out for the flexural test.
Comparative example 2
The high-fracture-resistance wear-resistant concrete with the single-doped modified steel fiber comprises the following raw materials in parts by weight: 310 parts of P & O general portland cement, 30 parts of fly ash, 700 parts of machine-made sand, 1300 parts of crushed stone, 130 parts of water, 60 parts of modified steel fiber and 6 parts of additive. The additive is a high-efficiency polycarboxylic acid water reducing agent.
Wherein the steel fiber is a linear copper-plated steel fiber, the length of the steel fiber is 10mm, the diameter of the steel fiber is 0.2mm, and the volume of the steel fiber in the hybrid fiber concrete is 0.7%.
Firstly, adding sand and gravel into a stirrer, simultaneously adding premixed modified steel fibers, stirring for 40s, then adding cement and fly ash, and continuously stirring for 100s to uniformly mix the fibers, powder and aggregate. And finally, fully mixing the additive and water, adding the mixture into a stirrer, and stirring for 140s to obtain the steel fiber mixed fiber concrete. And (4) standard maintenance is carried out after the die filling and forming, and the 150X 150mm test piece is taken out for a wear-resisting test after the test piece reaches the age. After the test piece with the size of 150X 600mm reaches the age period, the test piece is taken out for the flexural test.
The early anti-cracking test is carried out according to GB/T50082-2009 standard test method for long-term performance and durability of common concrete, and the surface wind speed of a concrete test piece is 5m/s during the test.
The abrasion resistance test was carried out according to JTG E30-2005 test Specification for road engineering Cement and Cement concrete.
The bending resistance test is carried out according to GB/T50081-2019 concrete physical and mechanical property test method standard.
TABLE 1 tables showing the results of the early crack resistance tests of examples 1 to 3 and comparative examples 1 to 2
TABLE 2 tables of results of measuring properties of examples 1 to 3 and comparative examples 1 to 2
| 7d flexural strength/MPa | 28d flexural strength/MPa | Abrasion loss/kg/m2 | |
| Example 1 | 4.91 | 6.76 | 3.12 |
| Example 2 | 5.53 | 9.54 | 3.04 |
| Example 3 | 6.11 | 9.23 | 3.35 |
| Comparative example 1 | 4.01 | 5.39 | 3.56 |
| Comparative example 2 | 5.34 | 7.97 | 3.79 |
As can be seen from the data in tables 1 and 2 above, when the respective proportions of the steel fiber and the polyethylene fiber are changed under the same total fiber content, the number of early cracks is the least, the crack resistance is the best, and the flexural strength and the wear resistance are the most excellent when the proportion of the steel fiber in the hybrid fiber concrete is 0.7% by volume and the proportion of the polyvinyl alcohol fiber in the hybrid fiber concrete is 0.3% by volume. The reason is that the steel fiber with the thicker size and the polyvinyl alcohol fiber with the thinner size have complementary action, and the thin fiber increases the early cohesive force of the concrete, inhibits the crack from developing and improves the internal structure of the concrete; the coarse fiber improves the later strength of the concrete. The improvement of cracks and defects leads to the improvement of the surface quality of concrete and the corresponding improvement of the wear resistance. Namely, the hybrid fiber concrete has good flexural strength and wear resistance, and has remarkable progress compared with the prior art.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (9)
1. The high-fracture-resistance wear-resistance hybrid fiber concrete is characterized by comprising the following components in parts by weight: 300-400 parts of cement, 0-100 parts of fly ash, 600-850 parts of sand, 1000-1400 parts of broken stone, 100-200 parts of water, 32-160 parts of hybrid fiber and 3-20 parts of additive.
2. The high bending and abrasion resistant hybrid fiber concrete according to claim 1, wherein the hybrid fiber is composed of 30-150 parts of modified steel fiber and 2-10 parts of polyvinyl alcohol fiber.
3. The high-breaking-resistance wear-resistance hybrid fiber concrete according to claim 2, wherein the modified steel fibers are copper-plated steel fibers, the shapes of the modified steel fibers comprise one or a combination of more of linear type, corrugated type and end hook type, the length of the modified steel fibers is 10-20 mm, the diameter of the modified steel fibers is 0.2-0.4 mm, the ultimate elongation is less than or equal to 25%, and the tensile strength is greater than or equal to 2500 Mpa.
4. The high bending and abrasion resistance hybrid fiber concrete according to claim 2, wherein the steel fiber accounts for 0.3 to 3% of the volume of the hybrid fiber concrete.
5. The high-breaking-resistance wear-resistance hybrid fiber concrete according to claim 2, wherein the length of the polyvinyl alcohol fiber is 20-30 mm, the diameter is 40-60 μm, the ultimate elongation is 6-8%, and the tensile strength is greater than or equal to 1500 MPa.
6. The high bending and abrasion resistance hybrid fiber concrete according to claim 2, wherein the polyvinyl alcohol fiber accounts for 0.1 to 0.5 percent of the volume of the hybrid fiber concrete.
7. The high-fracture-resistance wear-resistance hybrid fiber concrete according to claim 1, wherein the sand is medium sand with fineness modulus of 2.3-2.9, and is one or a combination of river sand, machine-made sand and quartz sand.
8. The preparation method of the high-fracture-resistance wear-resistance hybrid fiber concrete is characterized by comprising the following steps of:
1) the preparation method of the modified steel fiber comprises the following steps:
mixing 5-10 parts by weight of deionized water, 50-100 parts by weight of absolute ethyl alcohol and 5-10 parts by weight of silane coupling agent, putting the mixture into a magnetic stirring pot, stirring for 30-60 min, adding 1 part by weight of steel fiber, soaking for 1-2 hours, taking out, putting the mixture into a 40 ℃ oven, and drying to obtain modified steel fiber;
2) weighing the raw materials according to the weight ratio of claim 1, adding the weighed sand, broken stone, premixed modified steel fiber and polyvinyl alcohol fiber into a stirrer, stirring for 30-60 s, adding cement and fly ash, and continuously stirring for 30-120 s to uniformly mix the fiber, the powder and the aggregate;
3) and finally, fully mixing the admixture with water, adding the mixture into a stirrer, and stirring for 100-200 s to obtain the fiber concrete with the steel fibers and the polyvinyl alcohol fibers mixed.
9. The method for preparing the hybrid fiber concrete with high fracture resistance and wear resistance according to claim 8, wherein the silane coupling agent is one or more of gamma-aminotriethylsilane, gamma- (2, 3-epoxypropoxy) propyltrimethoxysilane, gamma- (beta-aminoethyl) aminopropyltrimethoxysilane and gamma-methacryloxypropyltrimethoxysilane.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113929388A (en) * | 2021-10-25 | 2022-01-14 | 深圳市纳路特建材科技有限公司 | Wear-resistant anti-cracking cement mortar and preparation method thereof |
| CN113968706A (en) * | 2021-11-16 | 2022-01-25 | 保利长大工程有限公司 | Preparation method and test of wear-resistant concrete |
| CN114031346A (en) * | 2021-11-15 | 2022-02-11 | 深圳市纳路特建材科技有限公司 | Anti-cracking cement mortar and application thereof |
| CN114591039A (en) * | 2022-02-14 | 2022-06-07 | 中国一冶集团有限公司 | Steel-PVA hybrid fiber reinforced concrete waterproof and impervious material and preparation method thereof |
| CN114772995A (en) * | 2022-03-31 | 2022-07-22 | 东南大学 | Preparation method and device of hybrid oriented fiber concrete |
| CN115368106A (en) * | 2022-10-24 | 2022-11-22 | 保定中联水泥有限公司 | High-strength cement concrete and preparation method thereof |
Citations (6)
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