CN114853423A - Metamaterial functionally-gradient concrete and preparation method thereof - Google Patents
Metamaterial functionally-gradient concrete and preparation method thereof Download PDFInfo
- Publication number
- CN114853423A CN114853423A CN202210542147.8A CN202210542147A CN114853423A CN 114853423 A CN114853423 A CN 114853423A CN 202210542147 A CN202210542147 A CN 202210542147A CN 114853423 A CN114853423 A CN 114853423A
- Authority
- CN
- China
- Prior art keywords
- metamaterial
- concrete layer
- ultra
- performance concrete
- thickness
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
- C04B20/10—Coating or impregnating
- C04B20/1018—Coating or impregnating with organic materials
- C04B20/1029—Macromolecular compounds
- C04B20/1037—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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]
-
- 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
Abstract
The invention discloses metamaterial functionally gradient concrete and a preparation method thereof. The whole structure is a five-layer structure with three ultra-high performance concrete layers containing metamaterials and two polyurea coatings arranged in a staggered mode. The polyurea coating mainly plays roles in damping vibration waves and buffering vibration; the first ultra-high performance concrete layer containing the metamaterial has a strong anti-cracking effect, and the pit area can be effectively reduced when the first ultra-high performance concrete layer is hit by a shell; the second metamaterial-containing ultrahigh-performance concrete layer has good fluidity to wrap the coarse aggregate and provides good supporting and restraining effects for the coarse aggregate; the third ultra-high performance concrete layer containing the metamaterial has excellent anti-collapse performance, and can maintain the stability of the whole metamaterial functionally-gradient concrete material structure. The metamaterial functionally graded concrete designed by the invention can effectively reduce penetration depth and damage area of protective engineering materials when resisting series warheads.
Description
Technical Field
The invention belongs to the technical field of protection engineering, and particularly relates to metamaterial functionally gradient concrete with excellent penetration resistance, explosion resistance and series warhead performance and a preparation method thereof.
Background
Nowadays, the great lethal weapons are in endless, and the traditional reinforced concrete structure has unsatisfactory effect when defending against the series warhead attack with extremely high destructive power. Therefore, designing a concrete material with better protective performance is a primary task in the field of protective engineering.
The principle of the series connection of the warheads is that two or more warheads are connected in series and are detonated in sequence within a very short time difference to form energy-gathered jet flow striking first, and the subsequent warheads are subjected to penetration and explosion destruction. Aiming at the characteristics of the series warheads, different structures are designed on the concrete material to resist the series warheads. Domestic and foreign researches show that the functionally graded concrete has the characteristics of high resistance, fire prevention, explosion prevention, strong designability and the like, and can cope with penetration explosion coupling damage of advanced earth drilling bullets. On the basis of research on the functional gradient concrete, the metamaterial structural unit is introduced to further optimize the structure, and the performance of the protective material for resisting serial warhead attack is greatly improved by designing the metamaterial functional gradient concrete.
Disclosure of Invention
The technical scheme of the invention is as follows:
a metamaterial functionally graded concrete sequentially comprises a first metamaterial-containing ultrahigh-performance concrete layer, a first polyurea coating, a second metamaterial-containing ultrahigh-performance concrete layer, a second polyurea coating and a third metamaterial-containing ultrahigh-performance concrete layer, wherein,
the first metamaterial-containing ultrahigh-performance concrete layer comprises the following components in percentage by volume: 94% of matrix mortar and 6% of modified fiber;
the second metamaterial-containing ultra-high performance concrete layer comprises the following components in percentage by volume: 52.6 percent of modified coarse aggregate, 3 percent of modified fiber and 44.4 percent of matrix mortar;
the third ultra-high performance concrete layer containing the metamaterial comprises the following components in percentage by volume: the matrix mortar accounts for 96 percent, and the modified fiber accounts for 4 percent.
Preferably, the base mortar comprises the following components in percentage by mass:
portland cement: 28.02% -31.24%
Silica fume: 3.16% -5.16%
Microbeads: 14.68 to 21.06 percent
Modified fine aggregate: 45.86 to 56.24 percent
High-efficiency water reducing agent: 0.92% -1.21%
Defoaming agent: 0.02% -0.04%
Water: 7.34% -9.17%.
Preferably, the modified fiber is a fiber wrapped with a polyurea coating with the thickness of 0.5-1 mm.
Preferably, the modified coarse aggregate is the coarse aggregate wrapped by the polyurea coating, and the wrapping thickness of the modified coarse aggregate is 10-20% of the diameter of the coarse aggregate. Preferably, the modified fine aggregate is a fine aggregate coated with a polyurea coating with the thickness of 0.5-1 mm.
The preparation method of the metamaterial functionally gradient concrete comprises the following steps:
(1) weighing cement, microbeads, silica fume and modified fine aggregate in proportion, putting the weighed materials into a stirrer, uniformly mixing the materials, water, a high-efficiency water reducing agent and a defoaming agent, adding the materials into the stirrer, uniformly stirring the materials for 10-12 minutes, adding modified fibers into the stirrer to obtain a slurry state, stirring the materials for 10-15 minutes, completely wrapping the fibers by concrete slurry, and respectively preparing slurry of a first ultra-high performance concrete layer containing the ultra-materials, slurry of a second ultra-high performance concrete layer containing the ultra-materials and slurry of a third ultra-high performance concrete layer containing the ultra-materials;
(2) pouring the slurry of the first metamaterial-containing ultra-high performance concrete layer into a mold, and determining that the pouring thickness accounts for 5% -10% of the total thickness; spraying a first polyurea coating on the surface, wherein the spraying thickness accounts for 1% -3% of the total thickness; firstly, pouring partial slurry of a second metamaterial-containing ultrahigh-performance concrete layer, closely arranging the modified coarse aggregate in a mold, and then continuously pouring the residual slurry of the second metamaterial-containing ultrahigh-performance concrete layer to tightly wrap the modified coarse aggregate, wherein the pouring thickness accounts for 20-25% of the total thickness; spraying a second polyurea coating, wherein the spraying thickness accounts for 1% -3% of the total thickness; pouring slurry of a third metamaterial-containing ultra-high performance concrete layer, and determining that the pouring thickness accounts for 60% -75% of the total thickness;
(3) and curing at normal temperature for not less than 60 days after molding.
Compared with the prior art, the invention has the advantages that:
(1) compared with the prior art, the metamaterial functionally-graded concrete prepared by the invention has the advantages that the compressive property is improved by 10-15% and the flexural property is improved by 15-20%;
(2) when the metamaterial functionally-graded concrete target prepared by the invention is hit by the serial warhead, compared with the prior art, the jet depth is reduced by 20-35%, the pit area is reduced by 25-30%, and the penetration depth of bullets is reduced by 10-15%.
Drawings
FIG. 1 is a structural schematic diagram of a metamaterial unit, wherein (a) is a modified aggregate unit, and (b) is a modified fiber unit.
FIG. 2 is a schematic diagram of metamaterial functionally gradient concrete.
The concrete comprises a concrete layer, a polyurea coating, a modified coarse aggregate, a first super-material-containing ultra-high-performance concrete layer, a second polyurea coating, a third super-material-containing ultra-high-performance concrete layer and a third polyurea coating, wherein the first super-material-containing ultra-high-performance concrete layer is 1, the first polyurea coating is 2, the second super-material-containing ultra-high-performance concrete layer is 3, the second polyurea coating is 4, the third super-material-containing ultra-high-performance concrete layer is 5, and the modified coarse aggregate is 3-1.
Detailed Description
The present invention will be described in further detail with reference to the following examples and the accompanying drawings.
Referring to fig. 1, the metamaterial structure unit provided by the invention is a modified aggregate unit and a modified fiber unit, and sequentially comprises a concrete layer, a polyurea coating and an aggregate (fiber). The concrete layer plays a good protection role and maintains the stability of the unit structure; the polyurea coating has extremely obvious attenuation effect on high-frequency vibration shock waves; the internal aggregate and fiber can absorb the kinetic energy of jet flow and bullet to a great extent.
With reference to fig. 2, the overall structure of the metamaterial functionally gradient concrete of the present invention is a five-layer structure with three metamaterial-containing ultrahigh-performance concrete layers and two polyurea coatings staggered, and the concrete sequentially includes, from top to bottom, a first metamaterial-containing ultrahigh-performance concrete layer 1, a first polyurea coating 2, a second metamaterial-containing ultrahigh-performance concrete layer 3, a second polyurea coating 4, and a third metamaterial-containing ultrahigh-performance concrete layer 5. The first ultra-high performance concrete layer 1 containing the metamaterial has a strong anti-cracking effect, and can effectively reduce the pit-opening area when being hit by a shell; the second metamaterial-containing ultrahigh-performance concrete layer 3 has good fluidity to wrap the modified coarse aggregate 3-1, and provides good supporting and restraining effects for the modified coarse aggregate 3-1, so that the modified coarse aggregate can exert the best performance; the third ultra-high performance concrete layer 5 containing the metamaterial has excellent anti-collapse performance, is responsible for absorbing residual energy and maintaining the structure of the target body not to collapse, and can maintain the stability of the whole metamaterial functionally-graded concrete material structure; the first polyurea coating 2 and the second polyurea coating 4 mainly play a role of damping vibration waves and shock buffering.
The metamaterial functionally graded concrete designed by the invention can effectively reduce penetration depth and damage area of protective engineering materials when resisting series warheads.
In the matrix mortar, the Portland cement is P.II52.5 Portland cement, and the particle size is concentrated to 5.6-40 mu m; the silica fume and the micro-beads are micron-sized industrial waste residues, and the particle size is concentrated at 0.1-5.6 mu m. The fine aggregate in the modified fine aggregate is quartz sand or corundum sand, the quartz sand accounts for 51.3% of 20-40 meshes, the quartz sand accounts for 28.2% of 40-70 meshes, and the quartz sand accounts for 20.5% of 70-100 meshes; the grain diameter of the corundum sand is 0-1 mm accounting for 60%, and 1-3 mm accounting for 40%. The high-efficiency water reducing agent is a polycarboxylic acid water reducing agent, and the water reducing rate is not lower than 35%; the defoaming agent is modified polyether.
In the second metamaterial-containing ultra-high performance concrete layer, coarse aggregates in the modified coarse aggregates are YG6 tungsten steel balls or alumina ceramic balls, the grain size of the tungsten steel balls is 1.2-1.6, the hardness is HRA 90, and the tensile strength is greater than 1600 MPa; the density of the alumina ceramic ball is 3.85-3.95 g/cm 3 And the compressive strength is 2.0-2.7 GPa.
The modified coarse aggregate, the modified fine aggregate, the modified fiber and the polyurea adopted in the polyurea coating have the breaking elongation of more than 400 percent and the tensile strength of more than 20 MPa.
The fiber type in the modified fiber is one or more of straight steel fiber, polyvinyl alcohol fiber or basalt fiber. The diameter of the flat steel fiber is 0.17-0.2 mm, the length of the flat steel fiber is 6-20 mm, and the tensile strength of the flat steel fiber is not less than 1800 MPa; the polyvinyl alcohol fiber has the diameter of 26-40 mu m, the length of 6-20 mm and the tensile strength of not less than 1600 MPa; the diameter of the basalt fiber is 13-17 μm, the length is 6-20 mm, and the tensile strength is not less than 3000 MPa.
Example 1
Respectively preparing concrete slurry of the three mixers, wherein the concrete slurry is prepared according to the following proportion and steps: selecting 28.02 percent by weight of cement, 3.16 percent by weight of silica fume, 14.68 percent by weight of micro-beads and 45.86 percent by weight of modified quartz sand (coated with a polyurea coating with the thickness of 0.5 mm), putting the materials into a stirrer, stirring uniformly, adding a mixed solution of 7.34 percent of water, 0.92 percent of high-efficiency water reducing agent and 0.02 percent of defoaming agent, and continuously stirring for 10 minutes to obtain concrete slurry (matrix mortar).
Weighing the modified steel fiber with the volume ratio of 4% (coated with 0.5 mm polyurea coating) and the modified polyvinyl alcohol fiber with the volume ratio of 2% (coated with 0.5 mm polyurea coating) according to the volume percentage of the first metamaterial-containing ultrahigh-performance concrete layer, and placing the modified steel fiber and the 2% modified polyvinyl alcohol fiber into the concrete slurry of one of the mixers to be stirred for 15 minutes to obtain the slurry of the first metamaterial-containing ultrahigh-performance concrete layer.
And weighing the modified steel fiber with the volume rate of 3% (coated with the polyurea coating of 0.5 mm) according to the volume percentage of the second metamaterial-containing ultra-high performance concrete layer, and placing the modified steel fiber into the concrete slurry of the other mixer to be mixed for 15 minutes to obtain the slurry of the second metamaterial-containing ultra-high performance concrete layer.
And weighing the modified steel fiber (coated with 0.5 mm polyurea coating) with the volume ratio of 4% according to the volume percentage of the third ultra-high performance concrete layer containing the metamaterial, and placing the modified steel fiber into the concrete slurry of the rest of the mixer to be mixed for 15 minutes to obtain the slurry of the third ultra-high performance concrete layer containing the metamaterial.
Pouring the slurry of the first metamaterial-containing ultra-high performance concrete layer into a mold, wherein the pouring thickness is 40 mm; spraying a 5 mm-thick polyurea coating thereon as a first polyurea coating; pouring slurry of a part of the second metamaterial-containing ultrahigh-performance concrete layer, closely arranging modified coarse aggregate (the tungsten steel balls with the diameter of 20 mm are coated with polyurea coatings with the thickness of 2 mm) in a mold, continuously pouring the slurry of the rest of the second metamaterial-containing ultrahigh-performance concrete layer to enable the slurry to tightly wrap the modified coarse aggregate, and pouring the slurry with the thickness of 110 mm; spraying a polyurea coating with the thickness of 5 mm as a second polyurea coating; and pouring slurry of a third ultra-high performance concrete layer containing the metamaterial, wherein the thickness of the slurry is 340 mm. The metamaterial functionally gradient concrete (target body) is a cylinder with the total thickness of 500 mm and the diameter of 500 mm. And covering a plastic film after pouring, and curing at normal temperature for more than 60 days.
The metamaterial functionally-graded concrete prepared by the process has the following mechanical properties: the concrete compressive strength of the first metamaterial-containing ultrahigh-performance concrete layer is 260 MPa, and the bending strength is 63 MPa; the concrete compressive strength of the second metamaterial-containing ultrahigh-performance concrete layer is 185 MPa, and the bending strength is 40 MPa; the concrete compressive strength of the third metamaterial-containing ultrahigh-performance concrete layer is 235 MPa, and the bending strength is 58 MPa.
And carrying out a series warhead hitting experiment combining energy-gathering jet flow and high-speed penetration on the target body. The diameter of a conical medicine-shaped cover made of red copper is 56 mm, the vertex angle is 60 degrees, the charging height is 73 mm, and the explosion height is 80 mm in the energy-gathering jet experiment; the bullet used in the high-speed penetration experiment is made of hollow 35CrMnSi alloy, the diameter of the bullet is 30 mm, the bullet length is 280 mm, the wall thickness is 5 mm, and the bullet speed is 800 m/s. After the target body is hit by the serial warhead, the jet perforation depth is 310 mm, the bullet penetration depth is 105 mm, and the surface pit area accounts for 35.2%.
Comparative example 1
Functionally graded concrete without meta-material was prepared, wherein functionally graded concrete (5-layer structure), overall dimensions (thickness and diameter) and preparation steps were the same as in example 1, except that: the fine aggregate, the coarse aggregate and the fiber in the three ultrahigh-performance concrete layers are not coated with the polyurea coating.
The functional gradient concrete (target body) without the metamaterial is prepared according to the process, and the measured mechanical properties of the related materials are as follows: the concrete compressive strength of the first ultrahigh-performance concrete layer is 230 MPa, and the bending strength is 51 MPa; the concrete compressive strength of the second ultra-high performance concrete layer is 160 MPa, and the bending strength is 35 MPa; the concrete compressive strength of the third ultra-high performance concrete layer is 206 MPa, and the bending strength is 48 MPa. After the target body is hit by the serial warhead, the perforating depth of the jet flow is 435 mm, the penetration depth of the bullet is 150 mm, and the area ratio of the surface pit is 47.2%.
Comparative example 2
Preparing the functional gradient concrete containing the metamaterial, wherein the preparation steps of the functional gradient concrete are the same as those of the embodiment 1, and the thicknesses of three super-high-performance concrete layers containing the metamaterial in the functional gradient concrete are the same as those of the embodiment except that: the functionally graded concrete is of a 3-layer structure and does not contain a first polyurea coating and a second polyurea coating, and the functionally graded concrete has the total thickness of 490mm and the diameter of 500 mm.
The mechanical properties of three ultra-high performance concrete layers containing the metamaterial are the same as those of the example 1, after the target body is hit by a serial warhead, the jet flow is perforated by 375 mm, the penetration depth of a bullet is 140 mm, and the area ratio of a surface pit is 37.2%.
Example 2
Functionally graded concrete containing metamaterials was prepared, wherein functionally graded concrete (5-layer structure), overall dimensions (thickness and diameter) and preparation steps were the same as in example 1, except that: the modified fine aggregate is modified corundum sand.
The metamaterial functionally-graded concrete (target body) prepared by the process has the following measured mechanical properties: the concrete compressive strength of the first metamaterial-containing ultrahigh-performance concrete layer is 260 MPa, and the bending strength is 63 MPa; the concrete compressive strength of the second metamaterial-containing ultra-high performance concrete layer is 185 MPa, and the bending strength is 40 MPa; the third concrete containing the metamaterial has the compressive strength of 250 MPa and the bending strength of 49 MPa. After the target body is hit by the serial warhead, the jet perforation depth is 295 mm, the bullet penetration depth is 102 mm, and the surface pit area ratio is 40.2%.
Example 3
Functionally graded concrete containing metamaterials was prepared, wherein functionally graded concrete (5-layer structure), overall dimensions (thickness and diameter) and preparation steps were the same as in example 1, except that: the modified coarse aggregate is modified alumina ceramic balls.
The metamaterial functionally-graded concrete (target body) prepared by the process has the following measured mechanical properties: the concrete compressive strength of the first metamaterial-containing ultra-high performance concrete layer is 270 MPa, and the bending strength is 59 MPa; the concrete compressive strength of the second metamaterial-containing ultra-high performance concrete layer is 205 MPa, and the bending strength is 37 MPa; the third concrete containing the metamaterial has 235 MPa of compressive strength and 58 MPa of bending strength. After the target body is hit by the serial warhead, the jet perforation depth is 326 mm, the bullet penetration depth is 114 mm, and the surface pit area accounts for 36.2%.
Example 4
Preparing functional gradient concrete containing metamaterials, wherein the types of raw materials, the total size (thickness and diameter) and the preparation steps of the functional gradient concrete are the same as those of the functional gradient concrete in example 1, except that: the thickness of the five-layer structure in the functionally graded concrete is respectively changed into: the concrete comprises a first metamaterial-containing ultrahigh-performance concrete layer 25 mm (5%), a first polyurea coating 5 mm (1%), a second metamaterial-containing ultrahigh-performance concrete layer 100 mm (20%), a second polyurea coating 5 mm (1%), and a third metamaterial-containing ultrahigh-performance concrete layer 375 mm (75%).
The metamaterial functionally gradient concrete (target body) is prepared by the process. After the target body is hit by the serial warhead, the jet perforation depth is 340 mm, the bullet penetration depth is 128 mm, and the surface pit area accounts for 53.2%.
Example 5
Preparing functional gradient concrete containing metamaterials, wherein the types of raw materials, the total size (thickness and diameter) and the preparation steps of the functional gradient concrete are the same as those of the functional gradient concrete in example 1, except that: the thickness of the five-layer structure in the functionally graded concrete is respectively changed into: the concrete comprises a first metamaterial-containing ultrahigh-performance concrete layer 50 mm (10%), a first polyurea coating 10 mm (2%), a second metamaterial-containing ultrahigh-performance concrete layer 125 mm (25%), a second polyurea coating 5 mm (1%) and a third metamaterial-containing ultrahigh-performance concrete layer 310 mm (62%).
The metamaterial functionally gradient concrete (target body) is prepared by the process. After the target body is hit by the serial warhead, the jet flow perforates 400 mm, the penetration depth of the bullet is 143 mm, and the area ratio of the surface pit is 38.2%.
Claims (7)
1. A metamaterial functionally graded concrete is characterized by sequentially comprising a first metamaterial-containing ultrahigh-performance concrete layer, a first polyurea coating, a second metamaterial-containing ultrahigh-performance concrete layer, a second polyurea coating and a third metamaterial-containing ultrahigh-performance concrete layer, wherein,
the first metamaterial-containing ultrahigh-performance concrete layer comprises the following components in percentage by volume: 94% of matrix mortar and 6% of modified fiber;
the second metamaterial-containing ultra-high performance concrete layer comprises the following components in percentage by volume: 52.6 percent of modified coarse aggregate, 3 percent of modified fiber and 44.4 percent of matrix mortar;
the third ultra-high performance concrete layer containing the metamaterial comprises the following components in percentage by volume: the matrix mortar accounts for 96 percent, and the modified fiber accounts for 4 percent.
2. The metamaterial functionally gradient concrete of claim 1, wherein the matrix mortar comprises, in mass percent:
portland cement: 28.02% -31.24%
Silica fume: 3.16% -5.16%
Microbeads: 14.68 to 21.06 percent
Modified fine aggregate: 45.86 to 56.24 percent
High-efficiency water reducing agent: 0.92% -1.21%
Defoaming agent: 0.02% -0.04%
Water: 7.34% -9.17%.
3. The metamaterial functionally gradient concrete of claim 1 or 2, wherein the modified fibers are fibers coated with a polyurea coating having a thickness of 0.5 to 1 mm.
4. The metamaterial functionally graded concrete of claim 1 or 2, wherein the modified coarse aggregate is a coarse aggregate coated with polyurea coating, the coating thickness is 10% to 20% of the diameter of the coarse aggregate, and the coarse aggregate is YG6 tungsten steel balls or alumina ceramic balls.
5. The metamaterial functionally graded concrete of claim 2, wherein the modified fine aggregate is a fine aggregate coated with a polyurea coating with a thickness of 0.5-1 mm, and the fine aggregate is quartz sand or corundum sand.
6. The metamaterial functionally gradient concrete of claim 1 or 2, wherein the thickness of the first metamaterial-containing ultra-high performance concrete layer accounts for 5% -10% of the total thickness of the metamaterial functionally gradient concrete; the thickness of the second metamaterial-containing ultra-high performance concrete layer accounts for 20% -25% of the total thickness of the metamaterial functionally gradient concrete; the thickness of the third metamaterial-containing ultrahigh-performance concrete layer accounts for 65% -75% of the total thickness of the metamaterial functionally gradient concrete; the thickness of the first polyurea coating and the thickness of the second polyurea coating both account for 1% -3% of the total thickness of the metamaterial functionally gradient concrete.
7. The method for preparing the metamaterial functionally gradient concrete as claimed in any one of claims 1 to 6, comprising:
(1) weighing cement, microbeads, silica fume and modified fine aggregate in proportion, putting the weighed materials into a stirrer, uniformly mixing the materials, water, a high-efficiency water reducing agent and a defoaming agent, adding the materials into the stirrer, uniformly stirring the materials for 10-12 minutes, adding modified fibers into the stirrer to obtain a slurry state, stirring the materials for 10-15 minutes, completely wrapping the fibers by concrete slurry, and respectively preparing slurry of a first ultra-high performance concrete layer containing the ultra-materials, slurry of a second ultra-high performance concrete layer containing the ultra-materials and slurry of a third ultra-high performance concrete layer containing the ultra-materials;
(2) pouring the slurry of the first metamaterial-containing ultra-high performance concrete layer into a mold, and determining that the pouring thickness accounts for 5% -10% of the total thickness; spraying a first polyurea coating on the surface, wherein the spraying thickness accounts for 1% -3% of the total thickness; firstly, pouring partial slurry of a second metamaterial-containing ultrahigh-performance concrete layer, closely arranging the modified coarse aggregate in a mold, and then continuously pouring the residual slurry of the second metamaterial-containing ultrahigh-performance concrete layer to tightly wrap the modified coarse aggregate, wherein the pouring thickness accounts for 20-25% of the total thickness; spraying a second polyurea coating, wherein the spraying thickness accounts for 1% -3% of the total thickness; pouring slurry of a third metamaterial-containing ultra-high performance concrete layer, and determining that the pouring thickness accounts for 60% -75% of the total thickness;
(3) and curing at normal temperature for not less than 60 days after molding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210542147.8A CN114853423B (en) | 2022-05-18 | 2022-05-18 | Metamaterial functionally-gradient concrete and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210542147.8A CN114853423B (en) | 2022-05-18 | 2022-05-18 | Metamaterial functionally-gradient concrete and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114853423A true CN114853423A (en) | 2022-08-05 |
| CN114853423B CN114853423B (en) | 2023-06-30 |
Family
ID=82639105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210542147.8A Active CN114853423B (en) | 2022-05-18 | 2022-05-18 | Metamaterial functionally-gradient concrete and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114853423B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120083689A (en) * | 2011-01-18 | 2012-07-26 | 연세대학교 산학협력단 | Manufacturing method of rc structure for blast resistance, retrofitting method of rc structure for blast resistance and rc panel for blast resistance |
| US20140099496A1 (en) * | 2010-12-06 | 2014-04-10 | Thomas L. Attard | High strength and high elasticity composite materials and methods of reinforcing substrates with the same |
| WO2018030728A1 (en) * | 2016-08-08 | 2018-02-15 | 한국건설기술연구원 | Ultra-high-performance fiber-reinforced concrete and manufacturing method therefor |
| CN110668771A (en) * | 2019-10-25 | 2020-01-10 | 常州大学 | Composite material with high impact resistance and compounding method thereof |
| CN212482275U (en) * | 2020-10-09 | 2021-02-05 | 山西中电科技特种装备有限公司 | Bulletproof and antiknock composite large plate for shelter |
| CN215413393U (en) * | 2021-04-08 | 2022-01-04 | 中国人民解放军火箭军工程设计研究院 | Polyurea dispersion infiltration polyhedral ceramic block protective structure |
-
2022
- 2022-05-18 CN CN202210542147.8A patent/CN114853423B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140099496A1 (en) * | 2010-12-06 | 2014-04-10 | Thomas L. Attard | High strength and high elasticity composite materials and methods of reinforcing substrates with the same |
| KR20120083689A (en) * | 2011-01-18 | 2012-07-26 | 연세대학교 산학협력단 | Manufacturing method of rc structure for blast resistance, retrofitting method of rc structure for blast resistance and rc panel for blast resistance |
| WO2018030728A1 (en) * | 2016-08-08 | 2018-02-15 | 한국건설기술연구원 | Ultra-high-performance fiber-reinforced concrete and manufacturing method therefor |
| CN110668771A (en) * | 2019-10-25 | 2020-01-10 | 常州大学 | Composite material with high impact resistance and compounding method thereof |
| CN212482275U (en) * | 2020-10-09 | 2021-02-05 | 山西中电科技特种装备有限公司 | Bulletproof and antiknock composite large plate for shelter |
| CN215413393U (en) * | 2021-04-08 | 2022-01-04 | 中国人民解放军火箭军工程设计研究院 | Polyurea dispersion infiltration polyhedral ceramic block protective structure |
Non-Patent Citations (3)
| Title |
|---|
| 赖建中等: "基于功能梯度原理的超高性能混凝土抗侵彻爆炸性能", 《硅酸盐学报》 * |
| 赖建中等: "基于功能梯度原理的超高性能混凝土抗侵彻爆炸性能", 《硅酸盐学报》, vol. 48, no. 08, 31 August 2020 (2020-08-31), pages 1189 * |
| 赖建中等: "超高性能混凝土抗侵彻及抗爆炸性能研究", 河北工业大学学报, no. 06 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114853423B (en) | 2023-06-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Li et al. | Influence of key design parameters of ultra-high performance fibre reinforced concrete on in-service bullet resistance | |
| Jiang et al. | Quasi-static and dynamic mechanical properties of eco-friendly ultra-high-performance concrete containing aeolian sand | |
| Lai et al. | Repeated penetration and different depth explosion of ultra-high performance concrete | |
| Feng et al. | Penetration resistance of hybrid-fiber-reinforced high-strength concrete under projectile multi-impact | |
| US8016938B2 (en) | Structures and components comprising blast-resistant concrete also suitable for limiting penetration of ballistic fragments | |
| Liu et al. | Projectile impact resistance of fibre-reinforced geopolymer-based ultra-high performance concrete (G-UHPC) | |
| Murali et al. | Repeated projectile impact tests on multi-layered fibrous cementitious composites | |
| CN110563401B (en) | 3D printing functional gradient concrete material for resisting series warhead and preparation method thereof | |
| FR2729658A1 (en) | COMPOSITE CONCRETE | |
| CN104774033A (en) | General purpose Portland cement based ultra-light physical foamed concrete | |
| JP2010538958A (en) | Impact resistant strain hardening brittle matrix composites for protective structures | |
| Shao et al. | Experimental and numerical investigations of penetration resistance of ultra-high strength concrete protected with ceramic balls subjected to projectile impact | |
| CN105622018A (en) | Anti-penetration and anti-explosion cement-based protective engineering material and preparation method thereof | |
| CN115124304A (en) | Reinforcing bar ultrahigh-performance fiber reinforced concrete penetration-resistant structure and preparation method thereof | |
| CN109437706A (en) | A kind of gunite concrete and its preparation method and application | |
| Shao et al. | Penetration resistance of ultra-high-strength concrete protected with layers of high-toughness and lightweight energy absorption materials | |
| CN101983946A (en) | Protection engineering material resisting repeated impacts and method of producing material with solid wastes | |
| Zhu et al. | Theoretical and experimental study of shaped charge jet penetration into high and ultra-high strength concrete targets | |
| CN112694342B (en) | Lightweight high-strength high-ductility cement-based cementing composite material and preparation method thereof | |
| DK178289B1 (en) | Light weight composite armor with structural strength | |
| CN105946311B (en) | A kind of anti-riot composite plate of superhigh tenacity shock resistance and preparation method thereof | |
| CN114853423B (en) | Metamaterial functionally-gradient concrete and preparation method thereof | |
| EP0299253A1 (en) | Chemically bonded ceramic armor materials | |
| CN106278051A (en) | A kind of shock resistance composite board and preparation method thereof | |
| CN112878585A (en) | High-explosion-resistance high-strength foamed aluminum-steel tube concrete composite column and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |