CN115477486A - Milling type steel fiber and application thereof in ultra-high performance concrete and wear-resistant terrace - Google Patents
Milling type steel fiber and application thereof in ultra-high performance concrete and wear-resistant terrace Download PDFInfo
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- CN115477486A CN115477486A CN202110598886.4A CN202110598886A CN115477486A CN 115477486 A CN115477486 A CN 115477486A CN 202110598886 A CN202110598886 A CN 202110598886A CN 115477486 A CN115477486 A CN 115477486A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 165
- 239000010959 steel Substances 0.000 title claims abstract description 165
- 239000000835 fiber Substances 0.000 title claims abstract description 151
- 239000011374 ultra-high-performance concrete Substances 0.000 title claims abstract description 74
- 238000003801 milling Methods 0.000 title claims abstract description 38
- 239000004567 concrete Substances 0.000 claims description 12
- 239000002344 surface layer Substances 0.000 claims description 8
- 239000010410 layer Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 5
- 238000005260 corrosion Methods 0.000 claims description 3
- 102000002151 Microfilament Proteins Human genes 0.000 abstract description 6
- 108010040897 Microfilament Proteins Proteins 0.000 abstract description 6
- 210000003632 microfilament Anatomy 0.000 abstract description 6
- 230000007547 defect Effects 0.000 abstract description 3
- 239000011248 coating agent Substances 0.000 abstract description 2
- 238000000576 coating method Methods 0.000 abstract description 2
- 239000002131 composite material Substances 0.000 abstract description 2
- 239000011159 matrix material Substances 0.000 description 11
- 230000003014 reinforcing effect Effects 0.000 description 10
- 230000008901 benefit Effects 0.000 description 8
- 239000004568 cement Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 4
- 238000004873 anchoring Methods 0.000 description 3
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
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- 239000011229 interlayer Substances 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
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- 229910021487 silica fume Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229920001410 Microfiber Polymers 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 239000006004 Quartz sand Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
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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
- 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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F15/00—Flooring
- E04F15/12—Flooring or floor layers made of masses in situ, e.g. seamless magnesite floors, terrazzo gypsum floors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Architecture (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Ceramic Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a milling type steel fiber and application thereof in ultra-high performance concrete and wear-resistant terraces. The steel fiber is obtained by milling a high-strength steel ingot or a steel plate, the section of the steel fiber is arc-shaped or approximately rectangular, the upper surface and the lower surface or the whole surface of the steel fiber are rough, end hooks are arranged at two ends of the steel fiber, the length of the steel fiber is 12-22 mm, the width of the section is 2-3 mm, the thickness of the section is 0.2-0.4 mm, the length of a hook at the end part is 1-2 mm, and the tensile strength of the steel fiber is 1500-2500 MPa. The body can be flat, arched or wavy, and the surface is provided with an anticorrosive coating. The invention overcomes the defects of over low tensile strength and poor toughness of the common milling steel fiber; compared with the traditional microfilament steel fiber, the composite material has the characteristics of high bonding strength, strong mechanical gripping force and the like, can effectively improve the initial crack strength of the ultra-high performance concrete, can further improve the structural durability, and is preferably applied to the ultra-high performance concrete and the ultra-high performance concrete wear-resistant terrace.
Description
Technical Field
The invention belongs to the field of building engineering materials, and particularly relates to a milled steel fiber and application thereof in ultra-high performance concrete and an ultra-high performance concrete wear-resistant terrace.
Background
The ultra-high performance concrete (UHPC) is a cement-based material based on close packing of aggregate and cementing material, low water-cement ratio and steel fiber reinforcement, has ultrahigh strength, high toughness and excellent durability, and gradually develops engineering application in a plurality of engineering fields in recent years. The maximum aggregate particle size is less than 8mm, the aggregate particle size is usually less than 2.36mm, the water-gel ratio is less than 0.24, and the compressive strength is not less than 120MPa.
The section of the micro-wire steel fiber commonly adopted in the ultra-high performance concrete is circular, the diameter is 0.15-0.3 mm, the length is 10-20 mm, the micro-wire steel fiber is straight or end-hooked, and the tensile strength is more than or equal to 2000MPa; because the interface bonding strength is far lower than the tensile strength of the steel fiber, the cooperative working effect of the microfilament steel fiber and the ultra-high performance concrete matrix is poor, and the anti-primary-cracking performance of the ultra-high performance concrete is hardly influenced. After the ultrahigh-performance concrete reaches the initial crack strength, the ultrahigh-performance concrete cracks, and the internal micro-fiber steel fibers can be quickly corroded in the natural environment, so that the structural durability is greatly reduced, the high durability of the ultrahigh-performance concrete is difficult to play a role, and a method for improving the initial crack strength of the ultrahigh-performance concrete is urgently needed to be developed.
The common milling steel fiber in the current market has a circular arc-shaped section, a rough inner arc surface and a smooth outer arc surface, the length is 30-34 mm, the width of the section is 1.4-3.8 mm, the thickness of the section is 0.1-0.4 mm, and the tensile strength is 700-1000 MPa. The bonding strength of the concrete with common concrete is higher, but experiments in ultra-high performance concrete show that: the common milling type steel fiber has the defects of low tensile strength, overlong fiber and poor toughness, is broken when the ultra-high performance concrete is damaged, and is difficult to exert excellent bonding performance.
Disclosure of Invention
In order to overcome the defects and shortcomings in the prior art, the invention aims to provide a milling type steel fiber.
The milled steel fiber provided by the invention is used for ultra-high performance concrete, and has the advantages of high strength, good toughness, rough surface and end hook. Compared with the microfilament steel fiber, the composite material has the characteristics of high bonding strength, strong mechanical gripping force and the like; compared with common milling type steel fiber, the high-strength and high-toughness steel fiber has the characteristics of high strength, high toughness and the like, and can effectively improve the initial crack strength of the ultrahigh-performance concrete.
The invention also aims to provide application of the milling type steel fiber in ultra-high performance concrete and ultra-high performance concrete wear-resistant terraces.
The purpose of the invention is realized by the following technical scheme:
a milled steel fiber is obtained by milling a high-strength steel ingot or a steel plate and comprises a steel fiber body with a circular arc-shaped or approximately rectangular cross section, wherein the steel fiber body is flat, arched or wavy, the upper surface and the lower surface or the whole surface of the steel fiber body are rough, and two ends of the steel fiber body are provided with end hooks.
Preferably, the tensile strength of the milled steel fiber is 1500-2500 MPa, and the surface of the milled steel fiber body is rough, so that the contact area between the milled steel fiber body and a cement matrix is greatly increased, and the bonding strength between the steel fiber and the matrix is greatly improved; the two ends are provided with the end hooks, so that the anchoring force of the steel fibers is further enhanced, the mechanical property of the steel fibers is fully exerted, and the initial crack strength of the ultra-high performance concrete can be improved.
Preferably, the length of the milling steel fiber is 12-22 mm, the width of the cross section is 2-3 mm, the thickness of the cross section is 0.2-0.4 mm, and the length of the end hook is 1-2 mm.
Preferably, the steel fiber body is straight, and the length of a straight line part of the steel fiber body is more than or equal to 2/3 of the total length of the fiber; the steel fiber body is arched, and the radian of the arch is 25-45 degrees, and more preferably 25-35 degrees; the steel fiber body is wavy and is provided with 2 wave crests, and the wave height is 0.6-1.2 mm.
Preferably, the steel fiber body is straight, the two ends of the steel fiber body are provided with end hooks, the end hooks are in a fold line shape, and the straight line part can be twisted, so that the mechanical biting force of the steel fiber is greatly enhanced, and the interface bonding strength of the steel fiber and the matrix is further improved.
Compared with a straight shape, the arched steel fiber body has better abrasion ability in an arched shape, can fully exert the toughness advantage of the fiber, improves the cooperative work of the arched steel fiber body and a concrete matrix, and achieves the purposes of reinforcing and toughening.
The wave-shaped steel fiber is provided with 2 wave crests, the wave height is 0.6-1.2 mm, the contact area of the steel fiber and the matrix is increased, the bonding efficiency of the steel fiber is improved, the uniformity of anchoring force in all directions is facilitated, and the anchoring force of the steel fiber and the matrix is further enhanced.
Preferably, the alloy steel material used for the milling type steel fiber consists of the following components: mn = 7.3-9.9%, C = 0.2-0.4%, al = 1.3-2.1%, S = 0-0.016%, P = 0-0.012%, and the balance of Fe and inevitable impurities.
Preferably, the surface of the milling type steel fiber can be subjected to rust prevention treatment, and the corrosion resistance of the steel fiber is greatly improved by preparing the anticorrosive coating on the surface of the steel fiber body, so that the steel fiber can be used in more complicated and severe environments.
The milling type steel fiber is applied to the ultra-high performance concrete and the ultra-high performance concrete wear-resistant terrace.
Preferably, the application is: the milling type steel fiber is singly doped or mixed with the micro-wire steel fiber into the components of the ultra-high performance concrete and the ultra-high performance concrete wear-resistant terrace, wherein the volume doping amount of the milling type steel fiber is 1-10%, and the volume doping amount of the micro-wire steel fiber is 0-4%.
More preferably, the volume mixing amount of the milling type steel fiber is 1-6%, and the volume mixing amount of the microfilament steel fiber is 1-4%.
The utility model provides an ultra high performance concrete wear-resisting terrace, includes ordinary concrete-based layer, reinforcing bar rack and the above-mentioned milling type steel fiber reinforcement ultra high performance concrete surface course, wherein mills steel fiber volume and is 1 ~ 6%, reinforcing bar rack is located ultra high performance concrete in situ to be connected with ordinary concrete through the connecting piece.
Preferably, the thickness of the milling steel fiber reinforced ultra-high performance concrete surface layer is 30-100 mm.
Compared with the prior art, the invention has the following advantages and beneficial effects:
(1) The milled steel fiber provided by the invention has a rough surface, so that the contact area between the milled steel fiber and an ultra-high performance concrete matrix is greatly increased, and the bonding strength between the steel fiber and the ultra-high performance concrete matrix is greatly improved.
(2) The milling steel fiber has the tensile strength of 1500-2500 MPa, and can improve the cooperative work of the milling steel fiber and an ultra-high performance concrete matrix by adopting a flat, arched or wavy structure and arranging end hooks at two ends, so that the mechanical property of the steel fiber is fully exerted, the initial crack strength of the ultra-high performance concrete is improved, the toughness advantage of the steel fiber is fully exerted, and the aim of enhancing and toughening is fulfilled.
(3) The milled steel fiber surface is subjected to anti-rust treatment, so that the corrosion resistance of the steel fiber is greatly improved, and the milled steel fiber surface can be used in more complex and severe environments.
(4) When the invention is applied to the field of ultra-high performance concrete wear-resistant terraces, the shock resistance of the wear-resistant terrace under the fatigue action can be enhanced under the condition of not using interlayer bonding agents, and the generation of fine cracks and possible bulges generated under the shock are reduced.
By combining the characteristics, the milled steel fiber can effectively improve the crack resistance and the impact resistance of the ultrahigh-performance concrete, and is not easy to generate micro cracks, so that the crack resistance and the impact resistance of the ultrahigh-performance concrete under extreme environments and special requirements are met, the service life of the structure is prolonged, and economic benefits, social benefits and environmental benefits are remarkable.
Drawings
FIG. 1 is a schematic view of milling flat steel fibers according to the present invention, in which: end hook 1, cross-section upper surface 2, cross-section lower surface 3.
FIG. 2 is a schematic diagram of milling arch-type steel fibers according to the present invention, in which: an end hook 1, a section inner arc surface 4, a section outer arc surface 5 and an arch radian alpha.
FIG. 3 is a schematic illustration of milling wavy steel fibers in accordance with the present invention, wherein: end hook 1 and wave crest 6.
FIG. 4 is a schematic cross-sectional view of milled steel fibers according to the present invention, in which: milling the upper surface 2 and the lower surface 3 of the steel fiber with an approximately rectangular section; in FIG. (b): the arc-shaped section is milled into an inner arc surface 4 and an outer arc surface 5 of the steel fiber.
FIG. 5 is a schematic diagram of the overall structure of the ultra-high performance concrete wear-resistant floor made of milled steel fibers according to the present invention, wherein: the concrete comprises a common concrete base layer 9, a reinforced steel bar net rack 8, a milled steel fiber reinforced ultra-high performance concrete surface layer 7, transverse steel bars 10, longitudinal steel bars 11 and short steel bars 12 for reinforcing connection.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but the embodiments of the present invention are not limited thereto.
Those who do not specify specific conditions in the examples of the present invention follow conventional conditions or conditions recommended by the manufacturer. The raw materials, reagents and the like which are not indicated for manufacturers are all conventional products which can be obtained by commercial purchase.
Example 1
Referring to the attached drawings 1 and 4 (a), the milled steel fiber for the ultra-high performance concrete is flat and straight in appearance, has the tensile strength of 1500MPa, the length of 12mm, the approximate rectangular cross section width of 2.5mm, the thickness of 0.2-0.4 mm and the end hook length of 1mm, is milled from a steel plate, and consists of the following alloy steel materials: mn =7.5%, C =0.3%, al =1.5%, S =0.012%, P =0.01%, and the balance Fe and unavoidable impurities.
Example 2
Referring to the attached drawings 2 and 4 (b), the milled section steel fiber for the ultra-high performance concrete has an arched appearance, a tensile strength of 2000MPa, a chord length of 22mm, a circular arc-shaped cross section, a width of 2mm, a thickness of 0.2-0.4 mm, a hook length at an end of 2mm, and a radian of 33 °, and is obtained by steel ingot milling, and the alloy steel fiber comprises the following components: mn =8.0%, C =0.25%, al =1.8%, S =0.008%, P =0.01%, and the balance Fe and inevitable impurities.
Example 3
Referring to the attached fig. 3 and 4 (b), the milled section steel fiber for ultra-high performance concrete has a wavy appearance, a tensile strength of 2500MPa, a length of 16mm, a circular cross section, a width of 3mm, a thickness of 0.2-0.4 mm, a hook length of 1.5mm at the end, 2 wave crests 6, and a wave height of 0.6mm, and is obtained by milling steel ingots, wherein the alloy steel fiber comprises the following components: mn =9.0%, C =0.2%, al =2%, S =0.008%, P =0.01%, and the balance Fe and inevitable impurities.
Comparative example 1
The microwire steel fibers used as a comparison were supplied by Guangdong Gantech New materials, inc., copper plated straight, 0.22mm in diameter, 13mm in length, and 2700MPa in tensile strength.
The advantages of the invention are embodied in the application of ultra-high performance concrete, so the steel fibers described in examples 1-3 are doped into the ultra-high performance concrete and compared with the proportion 1, and the mechanical property difference is analyzed.
The ultra-high performance concrete matrix adopts 42.5R portland cement, quartz sand with the maximum particle size of 1.18mm, original-state silica fume, a polycarboxylate water reducer and tap water.
The proportion of each group of the ultrahigh-performance concrete doped with different types of steel fibers is given in table 1, the components are given in parts by weight, and table 2 shows the performance of the milled steel fiber ultrahigh-performance concrete with each number.
TABLE 1 ultra high Performance concrete mix proportions
| Serial number | Cement | Silica fume | Sand | Water reducing agent | Water (I) | |
| 1. Microfilament steel fibre (comparative example 1) | 800 | 200 | 1195 | 50 | 157 | 150 |
| 2. Milling straight section steel fiber (example 1) | 800 | 200 | 1195 | 50 | 157 | 150 |
| 3. Milling arch steel fiber (example 2) | 800 | 200 | 1195 | 50 | 157 | 150 |
| 4. Milling wave steel fiber (example 3) | 800 | 200 | 1195 | 50 | 157 | 150 |
TABLE 2 ultra high Performance concrete Properties
| Serial number | Initial burst Strength (MPa) | Compressive strength (MPa) | Relative abrasion amount (%) |
| 1. Microfilament steel fibre (comparative example 1) | 9.2 | 150 | 100 |
| 2. Milling straight section steel fiber (example 1) | 11.3 | 161 | 88.5 |
| 3. Milling arch type steel fiber (example 2) | 12.1 | 157 | 87.1 |
| 4. Milling wave steel fiber (example 3) | 12.8 | 159 | 89.3 |
In the four groups of ultrahigh-performance concrete, the initial crack strength of the UHPC is greatly enhanced due to the good interface bonding property of the milled steel fibers and the UHPC, wherein the initial crack strength of the wavy milled steel fibers is highest.
Example 4
As shown in fig. 5, the milled steel fiber for ultra-high performance concrete of the present invention can be used in the field of wear-resistant terraces, and each wear-resistant terrace includes a milled steel fiber reinforced ultra-high performance concrete surface layer 7, a reinforced steel bar net rack 8, a common concrete base layer 9, transverse steel bars 10, longitudinal steel bars 11, and short steel bars 12 for reinforcement and connection.
The formulation and properties of the ultra-high performance concrete of this example are shown in tables 1 and 2. Wear resistance test according to the test regulations for road engineering cement and cement concrete (JTGE 30-2005) by mass loss method, the size of the standard test piece is 150X 150mm cubic, each mixing ratio is made into 3 groups of test pieces and the average value is taken.
And pouring a common concrete base layer, placing the bound reinforced steel bar net rack, and quickly pouring and milling the steel fiber reinforced ultrahigh-performance concrete to form a surface layer, wherein the thickness of the milled steel fiber reinforced ultrahigh-performance concrete surface layer is 80mm.
The specification of horizontal reinforcing bar 10 and vertical reinforcing bar 11 is 12@200 in the reinforcing bar rack, and horizontal reinforcing bar 10 is the U type, and vertical reinforcing bar 11 is located U type opening part, is applicable to and mills that the profiled steel fiber reinforcing ultra high performance concrete surface layer thickness is 60 ~ 100mm.
As shown in table 2, in the embodiment, by adding the milled steel fibers into the ultra-high performance concrete, the mass wear of the wear-resistant terrace under the fatigue action is reduced without using an interlayer binder, and the generation of fine cracks and the damage possibly caused by impact are reduced.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such modifications are intended to be included in the scope of the present invention.
Claims (10)
1. The milled steel fiber is characterized by being obtained by milling a high-strength steel ingot or a steel plate, and comprising a steel fiber body with a circular arc-shaped or approximately rectangular cross section, wherein the steel fiber body is flat, arched or wavy, the upper surface and the lower surface or the whole surface of the steel fiber body are rough, and end hooks are arranged at two ends of the steel fiber body.
2. The milled section steel fiber according to claim 1, wherein the milled section steel fiber has a length of 12 to 22mm, a section width of 2 to 3mm, a section thickness of 0.2 to 0.4mm, and a hook end length of 1 to 2mm; the tensile strength of the steel fiber is 1500-2500 MPa.
3. The milling steel fiber as set forth in claim 1, wherein the steel fiber body is flat and has a straight part length of 2/3 or more of the total fiber length; the steel fiber body is arched, and the radian of the arch is 25-45 degrees; the steel fiber body is wavy and is provided with 2 wave crests, and the wave height is 0.6-1.2 mm.
4. The milled steel fiber of claim 1, wherein the steel fiber body is straight, and has end hooks at two ends, the end hooks are in a zigzag shape, and the straight line part can be twisted.
5. The milled steel fiber according to claim 1, wherein the alloy steel material used for milling the steel fiber comprises the following components: mn = 7.3-9.9%, C = 0.2-0.4%, al = 1.3-2.1%, S = 0-0.016%, P = 0-0.012%, and the balance of Fe and inevitable impurities.
6. The milled steel fiber as claimed in claim 1, wherein the milled steel fiber surface is further treated to be rust-proof, and an anti-corrosion layer is prepared on the surface of the steel fiber body.
7. The use of the milled steel fiber of any one of claims 1 to 6 in ultra-high performance concrete and ultra-high performance concrete wear-resistant terraces.
8. The application of the milled steel fiber in ultra-high performance concrete and ultra-high performance concrete wear-resistant terraces is characterized in that the milled steel fiber is independently doped or mixed with the micro-wire steel fiber in the components of the ultra-high performance concrete and the ultra-high performance concrete wear-resistant terraces, wherein the volume doping amount of the milled steel fiber is 1-10%, and the volume doping amount of the micro-wire steel fiber is 0-4%.
9. The application of the milled steel fiber in the ultra-high performance concrete and the ultra-high performance concrete wear-resistant terrace according to claim 8, wherein the milled steel fiber and the micro-wire steel fiber are mixed and doped in the components of the ultra-high performance concrete and the ultra-high performance concrete wear-resistant terrace, wherein the volume doping amount of the milled steel fiber is 1-6%, and the volume doping amount of the micro-wire steel fiber is 1-4%.
10. The ultra-high performance concrete wear-resistant floor is characterized by comprising a common concrete base layer, a reinforced steel bar net rack and a milled steel fiber reinforced ultra-high performance concrete surface layer, wherein the volume doping amount of the milled steel fibers is 1-6%, the reinforced steel bar net rack is positioned in the ultra-high performance concrete layer and is connected with the common concrete through a connecting piece, the milled steel fibers are the milled steel fibers according to the claims 1-6, and the thickness of the milled steel fiber reinforced ultra-high performance concrete surface layer is 30-100 mm.
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| CN202110598886.4A CN115477486A (en) | 2021-05-31 | 2021-05-31 | Milling type steel fiber and application thereof in ultra-high performance concrete and wear-resistant terrace |
| PCT/CN2021/123965 WO2022252465A1 (en) | 2021-05-31 | 2021-10-15 | Milled steel fiber and application thereof in ultra-high performance concrete and wear-resistant terrace |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117843379A (en) * | 2023-12-29 | 2024-04-09 | 江苏科环新材料有限公司 | Waste power station boiler casting material reinforced by heat-resistant alloy steel cuttings and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101786816A (en) * | 2010-03-03 | 2010-07-28 | 上海交通大学 | Synthetic fabric concrete |
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| CN117843379A (en) * | 2023-12-29 | 2024-04-09 | 江苏科环新材料有限公司 | Waste power station boiler casting material reinforced by heat-resistant alloy steel cuttings and preparation method thereof |
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| WO2022252465A1 (en) | 2022-12-08 |
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