CN116161907A - Functionally gradient concrete buffering energy dissipation material, preparation method and application - Google Patents
Functionally gradient concrete buffering energy dissipation material, preparation method and application Download PDFInfo
- Publication number
- CN116161907A CN116161907A CN202211571998.1A CN202211571998A CN116161907A CN 116161907 A CN116161907 A CN 116161907A CN 202211571998 A CN202211571998 A CN 202211571998A CN 116161907 A CN116161907 A CN 116161907A
- Authority
- CN
- China
- Prior art keywords
- concrete
- buffering
- energy dissipation
- resin
- water
- 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.)
- Pending
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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/08—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against transmission of vibrations or movements in the foundation soil
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/2038—Resistance against physical degradation
- C04B2111/2046—Shock-absorbing materials
-
- 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
- C04B2111/40—Porous or lightweight materials
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Ceramic Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Hydrology & Water Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention belongs to the technical field of functional materials, and discloses a functional gradient concrete buffering energy dissipation material, a preparation method and application thereof, wherein the functional gradient concrete buffering energy dissipation material is prepared from water-swelling saturated resin, composite cementing material, fine aggregate and special additive, and the functional gradient concrete buffering energy dissipation material is formed by stacking water-absorbing resin aggregate concrete layers with different hole rates according to different arrangement sequences, wherein the maximum porosity of the water-absorbing resin aggregate concrete is 60%. According to the invention, the design of an internal pore structure can be realized by regulating and controlling the particle size of the resin particles, and different functional layers in the functionally gradient concrete are constructed according to the size of the pore rate; through continuous dehydration of the water-absorbent resin, the late hydration of the cementing material around the resin in each concrete layer is promoted, a compact and reinforced cement stone hollow spherical shell is formed, an inner shell framework structure similar to a hollow steel ball is presented, the compactness and durability of the concrete are improved, and the stability of the functionally graded concrete is enhanced.
Description
Technical Field
The invention belongs to the technical field of functional materials, relates to a cement-based functional gradient material, and in particular relates to a buffering energy dissipation material based on water-absorbing resin aggregate concrete, a preparation method and application.
Background
At present, underground engineering (protective engineering and civil air defense facilities) is an important disaster prevention rescue and combat readiness facility, and is easy to be hit by weapons and subjected to dynamic loads generated by impact and explosion.
The functional gradient material is a heterogeneous composite material with continuous and stable change of properties and functions by continuously changing the composition and structure of the material and eliminating interface mutation in the material as much as possible. The traditional functionally gradient concrete materials mainly adopt the following three modes: (1) macroscopic layered gradient compounding; (2) gradient compounding of fiber reinforced phases; (3) and (5) aggregate phase gradient compounding.
(1) Macroscopic layered gradient compounding: the novel target plate adopts an ultrahigh-toughness cement-based composite material as the energy absorbing layers at two sides of the plate member, and UHPC is used as the antiknock layer and is used as the middle antiknock layer, so that the characteristics of high strength and high toughness of the two materials are fully exerted.
(2) Fiber reinforced gradient compounding: the layers are continuous by changing the mixing amount of the fiber. For example, a functionally graded concrete member adopts four layers of steel fiber concrete with different doping amounts, the steel fiber is linearly increased from 0% to 2%, and the material strength and the breaking function are improved by about 50%.
(3) And (3) aggregate phase gradient compounding: the method changes the content gradient change of continuous pores in the EPS particles and the ACC particles, and has potential application value in the fields of shock resistance and structural heat preservation.
The continuity of the cement should be a fundamental requirement for cement-based functionally graded material design. In the research results, the macroscopic layered gradient composite mode is also a multilayer structure, discontinuous weak areas are easy to generate among layers, and the performance difference caused by the non-uniformity of materials can be amplified when dynamic load acts. The gradient composite mode of the fiber phase and the aggregate phase weakens the interface between the functional gradients, and can better avoid interlayer separation and delamination.
Through the above analysis, the problems and defects existing in the prior art are as follows: in the traditional functional gradient concrete materials, the macroscopic layered gradient composite mode is also a multilayer structure, discontinuous weak areas are easy to generate among layers, and when dynamic load acts, the performance difference caused by the non-uniformity of the materials can be amplified.
The difficulty of solving the problems and the defects is as follows: in order to form different gradients, the materials with different proportions or systems are generally selected, wherein the properties of the materials with different gradients are required to be obviously different. If the functional gradient material is required to be prepared by adjusting one or more components in the material proportion on the premise of keeping the same material matrix, obvious differences of material properties or structures can be caused, and the material design is difficult.
The meaning of solving the problems and the defects is as follows: the problems of insufficient stability and complex construction of partial functional gradient materials are solved, functional materials with different performances can be formed by adjusting the hole rate of the water-absorbent resin aggregate concrete, and the functional gradient materials are formed by overlapping layers according to a certain rule. When the functional layers are stacked, each functional layer can be automatically combined, continuous gradual change of hole rate can be realized, the workload is reduced, the integration of the functional gradient material is ensured, and the functional gradient is conveniently and simultaneously constructed in 2 dimensions by adopting the material.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention provides a functional gradient concrete buffering energy dissipation material, a preparation method and application thereof, and particularly relates to a functional gradient concrete buffering energy dissipation material based on resin aggregate internal mold regulation and control, a preparation method and application thereof.
The invention is realized in such a way that the functional gradient concrete buffering energy dissipation material is formed by laminating water-absorbent resin aggregate concrete layers with different hole rates, wherein the water-absorbent resin concrete is prepared from expanded water-absorbent saturated resin, composite cementing material, fine aggregate and special additive.
Further, the maximum porosity of the functionally graded concrete buffering energy dissipation material is 60%.
The invention also aims to provide a preparation method for implementing the functional gradient concrete buffering energy dissipation material, which comprises the following steps:
step one, mixing and stirring the expanded water-absorbent saturated resin, the composite cementing material, the fine aggregate and the special additive to prepare water-absorbent resin aggregate concrete with different hole rates;
step two, the design of an internal pore structure is realized by regulating and controlling the particle size of the resin particles, and different functions are realized by the size of the pore rate;
step three, slowly releasing water by utilizing the water-absorbing resin in the curing process, wherein the dehydrated concrete presents a millimeter-level three-dimensional inner shell skeleton structure;
step four, stacking the concrete with different hole structures layer by layer according to a certain sequence to form a functional gradient buffering energy dissipation material;
and fifthly, utilizing continuous dehydration of the water-absorbent resin to promote later hydration of cementing materials around the resin, forming a compact and reinforced cement stone hollow spherical shell, presenting an inner shell framework structure similar to a hollow steel ball, and utilizing an interlayer macroscopic interface and an inner shell framework structure interface to attenuate and disperse shock waves.
Further, the preparation method of the functionally graded concrete buffering energy dissipation material further comprises the following steps: the void ratio of the concrete is regulated by regulating the mixing amount of the resin.
Further, the different realization forms of the functional gradient include two-dimensional unidirectional gradient change, two-dimensional bidirectional gradient change and three-dimensional stereoscopic gradient change.
The invention further aims to provide an application of the functionally graded concrete buffering energy dissipation material in functionally graded concrete preparation.
The invention further aims to provide an application of the functionally graded concrete buffering energy-dissipating material in the shock absorption and energy dissipation of underground engineering.
Further, the application method of the functionally graded concrete buffering energy dissipation material in the buffering energy dissipation of underground engineering comprises the following steps:
after the ground is excavated, constructing an underground project; during backfilling, the functionally graded concrete based on the regulation and control of the resin aggregate internal mold is adopted for backfilling, so as to play a role in damping and energy dissipation; wherein, the FRP rib can be combined with the low-void-ratio functionally-gradient concrete to construct a protective structure as an underground engineering part.
The invention further aims to provide an application of the functionally graded concrete buffering energy dissipation material in buffering energy dissipation of protection engineering.
Further, the application method of the functional gradient concrete buffering energy dissipation material in the buffering energy dissipation of the protection engineering comprises the following steps:
after the ground is excavated, a protective structure is constructed; during backfilling, functional concrete with different hole rates regulated and controlled based on a resin aggregate internal mold is adopted for layered backfilling so as to play a role in damping and energy dissipation; wherein, FRP rib can be combined with the low-void-ratio functionally graded concrete to be used as a protective structure part.
By combining all the technical schemes, the invention has the advantages and positive effects that: the functional gradient concrete buffering energy dissipation material provided by the invention adopts a water-absorbing resin inner film regulating method to prepare a porous concrete material (see figure 2), and specifically comprises an expansion water-absorbing saturated resin, a composite cementing material, fine aggregate and a special additive, wherein the water-absorbing resin slowly releases water in the curing process, and the dehydrated concrete presents a millimeter-level three-dimensional inner shell skeleton structure. Through regulating and controlling the particle size of the resin particles, the design of an internal pore structure can be realized, and different functions can be realized through the size of the pore rate. The water-absorbent resin continuously dehydrates, promotes the later hydration of the cementing material around the resin, forms a compact and reinforced cement stone hollow spherical shell (see figure 3), and presents an inner shell framework structure similar to a hollow steel ball. Meanwhile, the defects of weak interfaces and gaps between coarse aggregate and cement stones in the traditional concrete are avoided, and the compactness, durability and overall stability of the concrete are effectively improved.
The water-absorbing resin aggregate concrete provided by the invention is a novel material, resin particles with high breaking strength are selected and mixed into the concrete, and unlike the traditional concrete, the water-absorbing resin in the traditional concrete is in a powdery state before water absorption expansion and can not keep a regular spherical shape in the concrete after water absorption. The water-absorbent resin concrete of the invention can construct a concrete three-dimensional hole structure through the water-absorbent resin. The functional gradient wave-dissipating energy-consuming material is characterized in that water-absorbing resin aggregate concrete with different hole ratios (different water-absorbing resin doping amounts) are arranged according to a certain hole ratio to be laminated layer by layer, and the material is a new development of development and application of the original water-absorbing resin concrete material.
According to the invention, the design of an internal pore structure can be realized by regulating and controlling the particle size of the resin particles, and different functional layers in the functionally gradient concrete are constructed according to the size of the pore rate; through continuous dehydration of the water-absorbent resin, the late hydration of the cementing material around the resin in each concrete layer is promoted, so that a compact and reinforced cement stone hollow spherical shell is formed, and an inner shell framework structure similar to a hollow steel ball is formed. The water-absorbent resin aggregate concrete layers with different hole rates are laminated to form an interlayer macroscopic interface, the water-absorbent resin is dehydrated and hollow to form an internal three-dimensional spherical hole structure, the interface effect can be utilized to consume concentrated load and shock waves with high strain rate, energy absorption and shock absorption are realized, the water-absorbent resin aggregate concrete is utilized to construct a functional gradient material, on one hand, the weak interface and gap defect between coarse aggregate and cement stone in the traditional concrete can be avoided, and the compactness and durability of the concrete are improved; on the other hand, when the water-absorbing resin aggregate concrete with different hole ratios are stacked, the matrix materials are the same, so that the stacking construction is convenient, the bonding is tight, the interlayer damage possibility is reduced when dynamic load acts, and the stability of the functionally graded concrete is improved.
The buffering and energy-absorbing material for underground engineering, protection engineering and the like has the following main advantages:
1. because the porous material has the effect of absorbing wave and dissipating energy, the size of the pore rate is continuously changed to form a functional gradient material, the micro-level cementing material is continuous, the water-absorbent resin is used as an inner membrane to form a macroscopic pore, and the gradient change of the pore rate forms a functional layer, so that the interface effect can be further utilized to consume high strain rate to concentrate load and shock wave, and energy absorption, wave dissipation, shock resistance and shock absorption are realized.
2. The porosity of the material is 60% at maximum, the density is small, the strength is high, and the material has the characteristics of light weight and high strength.
3. The construction is convenient, the fluidity of the material is high, vibration is not needed, self-compaction can be realized, the next layer (gradient) can be poured after the complete material is initially set in the previous layer (gradient) pouring, and pouring and compounding among all layers (gradients) are convenient.
4. The material has no aggregate, the water-absorbent resin has light weight, is particularly suitable for places which lack backfill materials, such as offshore islands and reefs, and need to transport building raw materials in a long distance, the water-absorbent resin can be mixed after absorbing seawater and expanding, and finally a porous reinforced structure is formed (see fig. 2 and 3), so that the transport cost of the materials can be reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a preparation method of a functionally graded concrete buffering energy dissipation material provided by an embodiment of the invention;
FIG. 2 is a schematic diagram of porous concrete prepared by the method for regulating and controlling the inner film of the water-absorbent resin according to the embodiment of the invention;
FIG. 3 is a schematic illustration of an internal structural reinforcement zone (microhardness test) provided by an embodiment of the present invention;
FIG. 4 (a) is a two-dimensional unidirectional variation example graph of void fraction provided by an embodiment of the present invention;
FIG. 4 (b) is a two-dimensional bidirectional variation example graph of void fraction according to an embodiment of the present invention;
FIG. 5 is a schematic illustration of a solution provided by an embodiment of the present invention;
FIG. 6 is a schematic diagram of a simulation experiment apparatus according to an embodiment of the present invention;
FIG. 7 (a) is a schematic diagram of a 10% void fraction sample model provided by an embodiment of the present invention;
FIG. 7 (b) is a schematic diagram of a 20% void fraction sample model provided by an embodiment of the present invention;
FIG. 7 (c) is a schematic diagram of a 30% void fraction sample model provided by an embodiment of the present invention;
FIG. 7 (d) is a schematic diagram of a 40% void fraction sample model provided by an embodiment of the present invention;
fig. 8 (a) to 8 (d) are schematic diagrams of attenuation and dispersion phenomena after stress wave transmission of the water-absorbent resin aggregate concrete provided by the embodiment of the invention.
Detailed Description
The present invention will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Aiming at the problems existing in the prior art, the invention provides a functional gradient concrete buffering energy dissipation material, a preparation method and application, and the invention is described in detail below with reference to the accompanying drawings.
The functional gradient concrete buffering energy dissipation material provided by the embodiment of the invention is prepared from an expansion water absorption saturated resin, a composite cementing material, fine aggregate and a special additive.
As shown in fig. 1, the preparation method of the functionally graded concrete buffering energy dissipation material provided by the embodiment of the invention comprises the following steps:
s101, mixing and stirring the expanded water-absorbent saturated resin, the composite cementing material, the fine aggregate and the special additive to prepare water-absorbent resin aggregate concrete with different hole rates;
s102, designing an internal pore structure by regulating and controlling the particle size of the resin particles, and realizing different functions by the size of the pore rate;
s103, slowly releasing water by using the water-absorbing resin in the curing process, wherein the dehydrated concrete presents a millimeter-level three-dimensional inner shell skeleton structure;
s104, stacking the concrete with different hole structures layer by layer according to a certain sequence to form a functional gradient buffering energy dissipation material;
s105, continuous dehydration of the water-absorbent resin is utilized to promote later hydration of cementing materials around the resin, a compact and reinforced cement stone hollow spherical shell is formed, an inner shell framework structure similar to a hollow steel ball is presented, and interlayer macroscopic interfaces and an inner shell framework structure interface are utilized to attenuate and disperse shock waves.
The maximum porosity of the functionally graded concrete buffering energy dissipation material provided by the embodiment of the invention is 60%.
The proportions of the water-absorbent resin aggregate concrete with different void fractions are shown in Table 1.
TABLE 1 mixing ratio of Water-absorbent resin aggregate concrete with different void fractions
The technical scheme of the invention is further described below with reference to specific embodiments.
The underground engineering (protection engineering and civil air defense facilities) is an important disaster prevention rescue and combat readiness facility, is easy to be hit by weapons, is subjected to the action of stress waves generated by impact and explosion, and can enhance the buffering energy dissipation and wave absorption and shock absorption performance of the underground engineering and the structural safety and reliability of the underground engineering by constructing a functional gradient backfill layer based on porous concrete materials and fully utilizing the action of wave absorption and energy consumption of the porous concrete materials and the interface energy consumption effect of the functional gradient materials and combining the advantages of local material taking characteristics and self-compaction and convenience in construction of the material.
The material is developed for buffering and energy absorbing materials used for underground engineering, protection engineering and the like, and has the main advantages that:
1. because the porous material has the effect of absorbing wave and dissipating energy, the size of the pore rate is continuously changed to form a functional gradient material, the micro-level cementing material is continuous, the water-absorbent resin is used as an inner membrane to form a macroscopic pore, and the gradient change of the pore rate forms a functional layer, so that the interface effect can be further utilized to consume high strain rate to concentrate load and shock wave, and energy absorption, wave dissipation, shock resistance and shock absorption are realized.
2. The porosity of the material is 60% at maximum, the density is small, the strength is high, and the material has the characteristics of light weight and high strength.
3. The construction is convenient, the fluidity of the material is high, vibration is not needed, self-compaction can be realized, the next layer (gradient) can be poured after the complete material is initially set in the previous layer (gradient) pouring, and pouring and compounding among all layers (gradients) are convenient.
4. The material has no aggregate, the water-absorbent resin has light weight, is particularly suitable for places which lack backfill materials, such as offshore islands and reefs, and need to transport building raw materials in a long distance, the water-absorbent resin can be mixed after absorbing seawater and expanding, and finally a porous reinforced structure is formed (see fig. 2 and 3), so that the transport cost of the materials can be reduced.
The invention adopts a water-absorbent resin inner membrane regulating method to prepare a porous concrete material (see figure 2), in particular to an expansion water-absorbent saturated resin, a composite cementing material, fine aggregate and a special additive, wherein the water-absorbent resin slowly releases water in the curing process, and the dehydrated concrete presents a millimeter-level three-dimensional inner shell skeleton structure. Through regulating and controlling the particle size of the resin particles, the design of an internal pore structure can be realized, and different functions can be realized through the size of the pore rate. The water-absorbent resin continuously dehydrates, promotes the later hydration of the cementing material around the resin, forms a compact and reinforced cement stone hollow spherical shell (see figure 3), and presents an inner shell framework structure similar to a hollow steel ball. Meanwhile, the defects of weak interfaces and gaps between coarse aggregate and cement stones in the traditional concrete are avoided, and the compactness and durability of the concrete are effectively improved.
The porosity of the concrete can be regulated by regulating the mixing amount of the resin.
Compared with EPS concrete and foam concrete, the porous concrete material regulated by the water-absorbing resin aggregate inner film has higher strength, can be used as structural concrete, is beneficial to keeping a matrix continuous and setting gradients in the aspect of preparing functional gradient concrete, is easy to self-compound in the aspect of construction, and eliminates interfaces.
The functional gradient may have different implementation forms, such as two-dimensional unidirectional gradient change (see fig. 4), two-dimensional bidirectional gradient change, three-dimensional gradient change (stereo), and the like.
As shown in FIG. 5, the scheme of the invention is that after the ground is excavated, an underground engineering or protective structure is constructed, and during backfilling, the resin aggregate-based internal mold regulating and controlling functional gradient concrete is adopted for backfilling, so as to play a role in damping and energy dissipation.
The FRP rib is combined with the seawater aggregate concrete to form the protection structure of the underground engineering (protection structure) part in fig. 5, and the porous concrete regulated by the inner membrane can be used as structural concrete when the pore rate is low, has low elastic modulus, and has good working performance together with the FRP rib, strong deformability and the function of reducing shock waves through vibration. And simultaneously can realize continuity and gradient with the filling material.
The technical effects of the present invention will be further described with reference to specific experiments.
And (3) obtaining the attenuation and dispersion phenomenon of the stress wave after transmitting the water-absorbent resin aggregate concrete through a numerical simulation water-absorbent resin aggregate concrete SHPB experiment.
The simulation experiment device model provided by the embodiment of the invention is shown in fig. 6.
The sample models with different void fractions provided by the embodiment of the invention are shown in fig. 7 (a) -7 (d); among them, fig. 7 (a) is a 10% void fraction sample model, fig. 7 (b) is a 20% void fraction sample model, fig. 7 (c) is a 30% void fraction sample model, and fig. 7 (d) is a 40% void fraction sample model.
The attenuation and dispersion phenomenon after the stress wave transmitted through the water-absorbing resin aggregate concrete provided by the embodiment of the invention is shown in fig. 8 (a) to 8 (d).
The foregoing is merely illustrative of specific embodiments of the present invention, and the scope of the invention is not limited thereto, but any modifications, equivalents, improvements and alternatives falling within the spirit and principles of the present invention will be apparent to those skilled in the art within the scope of the present invention.
Claims (10)
1. The functional gradient concrete buffering energy dissipation material is characterized by being prepared from an expansion water-absorbing saturated resin, a composite cementing material, fine aggregate and a special additive.
2. The functionally graded concrete buffering and energy dissipating material of claim 1, wherein the functionally graded concrete buffering and energy dissipating material has a maximum void fraction of 60%.
3. A method for preparing a functionally graded concrete buffering energy dissipation material for implementing the functionally graded concrete buffering energy dissipation material according to any one of claims 1 to 2, characterized in that the method for preparing the functionally graded concrete buffering energy dissipation material comprises the following steps:
step one, mixing and stirring the expanded water-absorbent saturated resin, the composite cementing material, the fine aggregate and the special additive to prepare water-absorbent resin aggregate concrete with different hole rates;
step two, the design of an internal pore structure is realized by regulating and controlling the particle size of the resin particles, and different functions are realized by the size of the pore rate;
step three, slowly releasing water by utilizing the water-absorbing resin in the curing process, wherein the dehydrated concrete presents a millimeter-level three-dimensional inner shell skeleton structure;
step four, stacking the concrete with different hole structures layer by layer according to a certain sequence to form a functional gradient buffering energy dissipation material;
and fifthly, utilizing continuous dehydration of the water-absorbent resin to promote later hydration of cementing materials around the resin, forming a compact and reinforced cement stone hollow spherical shell, presenting an inner shell framework structure similar to a hollow steel ball, and utilizing an interlayer macroscopic interface and an inner shell framework structure interface to attenuate and disperse shock waves.
4. The method for preparing the functionally graded concrete buffering and energy dissipating material of claim 3, further comprising: the void ratio of the concrete is regulated by regulating the mixing amount of the resin.
5. The method for preparing the functional gradient concrete buffering energy dissipation material according to claim 3, wherein the water absorbing resin aggregate concrete with different hole structures is laminated layer by layer, and different implementation forms of the functional gradient comprise two-dimensional unidirectional gradient change, two-dimensional bidirectional gradient change and three-dimensional stereoscopic gradient change.
6. Use of a functionally graded concrete buffering energy dissipation material according to any one of claims 1-2 in functionally graded concrete preparation.
7. Use of a functionally graded concrete buffering energy dissipation material according to any one of claims 1-2 in the buffering energy dissipation of underground works.
8. The use of the functionally graded concrete buffering and energy dissipating material in the buffering and energy dissipating of underground engineering according to claim 7, wherein the use method of the functionally graded concrete buffering and energy dissipating material in the buffering and energy dissipating of underground engineering comprises the following steps:
after the ground is excavated, constructing an underground project; during backfilling, the resin aggregate-based internal mold regulating and controlling functional gradient concrete is adopted to perform multilayer backfilling, and shock waves are attenuated and dispersed by an interlayer macroscopic interface and an interface of an internal shell framework structure, so that the function of damping and energy dissipation is achieved.
9. Use of a functionally graded concrete buffering energy dissipation material according to any one of claims 1-2 in the buffering energy dissipation of protection engineering.
10. The use of the functionally graded concrete buffering and energy dissipating material in buffering and energy dissipating of protection engineering according to claim 9, wherein the use method of the functionally graded concrete buffering and energy dissipating material in buffering and energy dissipating of protection engineering comprises:
after the ground is excavated, a protective structure is constructed; during backfilling, the functionally graded concrete regulated and controlled based on the resin aggregate internal mold is adopted to perform layered backfilling after the hole rate is regulated, so as to play a role in damping and energy dissipation. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211571998.1A CN116161907A (en) | 2022-12-08 | 2022-12-08 | Functionally gradient concrete buffering energy dissipation material, preparation method and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211571998.1A CN116161907A (en) | 2022-12-08 | 2022-12-08 | Functionally gradient concrete buffering energy dissipation material, preparation method and application |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116161907A true CN116161907A (en) | 2023-05-26 |
Family
ID=86419119
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211571998.1A Pending CN116161907A (en) | 2022-12-08 | 2022-12-08 | Functionally gradient concrete buffering energy dissipation material, preparation method and application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116161907A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116922532A (en) * | 2023-07-20 | 2023-10-24 | 重庆大学溧阳智慧城市研究院 | Electromagnetic wave-absorbing concrete multilayer 3D printing path planning method |
| CN117245758A (en) * | 2023-07-14 | 2023-12-19 | 重庆大学溧阳智慧城市研究院 | Preparation method and component of impedance gradient water-absorbent resin reinforced electromagnetic wave-absorbing concrete |
-
2022
- 2022-12-08 CN CN202211571998.1A patent/CN116161907A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117245758A (en) * | 2023-07-14 | 2023-12-19 | 重庆大学溧阳智慧城市研究院 | Preparation method and component of impedance gradient water-absorbent resin reinforced electromagnetic wave-absorbing concrete |
| CN117245758B (en) * | 2023-07-14 | 2024-04-05 | 重庆大学溧阳智慧城市研究院 | Preparation method and component of impedance gradient water-absorbent resin reinforced electromagnetic wave-absorbing concrete |
| CN116922532A (en) * | 2023-07-20 | 2023-10-24 | 重庆大学溧阳智慧城市研究院 | Electromagnetic wave-absorbing concrete multilayer 3D printing path planning method |
| CN116922532B (en) * | 2023-07-20 | 2024-04-16 | 重庆大学溧阳智慧城市研究院 | Electromagnetic wave-absorbing concrete multilayer 3D printing path planning method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN116161907A (en) | Functionally gradient concrete buffering energy dissipation material, preparation method and application | |
| Azmee et al. | Ultra-high performance concrete: From fundamental to applications | |
| Giuffrida et al. | An overview on contemporary rammed earth buildings: technological advances in production, construction and material characterization | |
| CN106830834A (en) | Cement polymer base high-performance concrete permeable pavior brick and its manufacture method | |
| CN103553496B (en) | A kind of high damping self-compacting concrete | |
| Amran et al. | An ultra-lightweight cellular concrete for geotechnical applications–A review | |
| Lu | Recent advances in high strength lightweight concrete: From development strategies to practical applications | |
| Zhou et al. | Improving energy absorption capacity of foam concrete with gradient and layered architecture | |
| CN106116355A (en) | A kind of environmental protection lightweight aggregate concrete and preparation method thereof | |
| CN107500804A (en) | Gangue floating bead thermal insulation concrete and preparation method and application | |
| CN114133177A (en) | Low-carbon C130-C140 ultrahigh-performance self-compacting concrete containing coarse aggregate | |
| Chen et al. | Development of ultralightweight cement composites with low density and high-specific strength using hollow glass microspheres | |
| Xiao et al. | Low frequency vibration reduction bandgap characteristics and engineering application of phononic-like crystal metaconcrete material | |
| Prayuda | Fresh and hardened properties of lightweight concrete made with pumice as coarse aggregate | |
| Sun | Strength criterion for ecological light porous concrete under multiaxial stress | |
| Richard et al. | Effect of concrete modification on shear of connections for timber–concrete composites | |
| Inozemtcev | Case Studies of High-strength Lightweight Concrete Using Expanded Siliceous Aggregate | |
| Hassan et al. | Experimental study on lightweight concrete made with expanded clay aggregate and lime | |
| Ahmadi et al. | Comparing properties of foamed concrete and lightweight expanded clay aggregate concrete at the same densities | |
| CN105781006A (en) | Lightweight partition of gradient composite foamed concrete and preparation method of lightweight partition | |
| CN109485331A (en) | Double gradient highly energy-consuming concrete and underground engineering protective buffering layer fill method | |
| CN113816698A (en) | Foam concrete inorganic composite material and preparation method thereof | |
| Zhou et al. | A novel energy-absorbing composite structure with layers of basalt fiber fabric constraining waste brick particles and foam concrete | |
| Sun et al. | Mechanical and Thermal Properties of Phase Change Aerated Concrete with Paraffin Microcapsule | |
| Jayakumar et al. | Construction of Concrete Canoe using Light Weight Aggregates |
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 |