CN111077147B - Method for researching filling and blocking performance of rock-fill concrete and test device - Google Patents
Method for researching filling and blocking performance of rock-fill concrete and test device Download PDFInfo
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Abstract
The invention relates to the technical field of concrete, and discloses a method and a test device for researching the filling and blocking performance of rock-fill concrete, wherein the method comprises the following steps: preparing a transparent rockfill block model by adopting a transparent material; preparing slurry and mixing the slurry with aggregate to form a concrete model; pouring the concrete model in the rock-fill block model for a pouring test; according to the pouring test, the filling and blocking performance of the rock-fill concrete is researched and analyzed. According to the method and the test device for researching the filling and blocking performance of the rock-fill concrete, provided by the invention, the transparent rock-fill block model is prepared for pouring test, so that a globally visual perspective effect can be provided for the test research on the blocking mechanism, the flow characteristic and the filling state of the rock-fill concrete, the problem of unobservable pore state caused by the unobservable perspective of the rock-fill body is solved, the vacancy of the test method for researching the flow and filling performance of the rock-fill concrete can be filled, and the research on the performance of the rock-fill concrete is actively promoted.
Description
Technical Field
The invention relates to the technical field of concrete, in particular to a method and a test device for researching the filling and blocking performance of rock-fill concrete.
Background
The mass concrete plays an important role in modern engineering construction, particularly hydraulic and hydroelectric engineering construction. In China, the mass concrete poured in hydraulic and hydroelectric engineering is more than ten million cubes every year, and in addition, large-volume concrete is often adopted in ports, airport buildings, heavy machine foundations and the like. In order to reduce the hydration heat and cost of concrete, the cement consumption of mass concrete is reduced as much as possible. The basic principle of the rock-fill concrete is that the lump stones (or pebbles) with certain grain diameter are naturally piled on the surface of the storage bin, then the self-compacting concrete is poured into the rock-fill body, and the self-compacting concrete is automatically filled into the holes of the rock-fill by means of the special high flowing, anti-segregation and strong filling and bonding performances of the self-compacting concrete and only depending on the self-weight to form the complete, compact, high-strength and low hydration heat mass concrete. The rock-fill concrete effectively reduces hydration heat and CO by using a large amount of rock blocks (the grain diameter is more than 30cm) to reduce the using amount of cement2The concrete has the characteristics of small shrinkage of a concrete structure, improved anti-cracking and anti-shearing capacity, high construction speed, low hydration heat, easy temperature control, high construction quality, low engineering cost and the like, so the concrete has wide application prospect and also meets the urgent need of popularizing a green low-carbon technology.
The filling effect of self-compacting concrete in the rockfill pores determines the overall stability and the existence of weak planes of the rockfill concrete structure, and is therefore an important direction of research. In the research of the phenomenon of filling and blocking of the rock-fill concrete, most of the experimental methods adopt pit excavation detection, excavation detection and core drilling detection, and the experimental methods have the advantages that firstly, the experimental period is long, the manufacturing cost is high, secondly, the local compactness of the rock-fill concrete after the pouring is finished can only be researched through the method, and the structure is difficult to be evaluated in a detailed and integral manner. Therefore, the development of new technology has important promoting significance for researching the filling and blocking phenomena of the rock-fill concrete.
Disclosure of Invention
The embodiment of the invention provides a method and a test device for researching the filling and blocking performance of rock-fill concrete, which are used for solving or partially solving the problem that the filling and blocking performance of self-compacting concrete in rock-fill pores is difficult to research by the rock-fill concrete.
The embodiment of the invention provides a method for researching the filling and blocking performance of rock-fill concrete, which comprises the following steps: preparing a transparent rockfill block model by adopting a transparent material; preparing slurry and mixing the slurry with aggregate to form a concrete model; pouring the concrete model in the rock-fill block model for a pouring test; according to the pouring test, the filling and blocking performance of the rock-fill concrete is researched and analyzed.
On the basis of the scheme, the preparation process of the rockfill block model specifically comprises the following steps: obtaining a three-dimensional model of the rockfill block body through a three-dimensional modeling or 3D scanning technology; and obtaining a rock-fill block model through 3D printing according to the three-dimensional model of the rock-fill block.
On the basis of the scheme, the slurry comprises: clear carbomer slurry; the slurry comprises the following components in percentage by mass: 92.41-94.5% of deionized water, 0.30-0.35% of carbomer resin powder, 0.20-0.24% of neutral regulator triethanolamine and 5-7% of transparent glass beads.
On the basis of the scheme, the preparation process of the slurry comprises the following steps: adding carbomer resin powder to deionized water; after the solution is completely dissolved, triethanolamine is added dropwise to adjust the solution to be neutral; standing for a certain time to obtain transparent carbomer gel; adding glass beads, uniformly stirring and performing vacuum suction to obtain transparent slurry.
On the basis of the scheme, according to a pouring test, the research and analysis on the filling and blocking performance of the rock-fill concrete comprises the following steps: and analyzing the flowing state, filling effect and aggregate migration and blocking performance of the concrete model in the pores of the rock-fill block model in the pouring test process.
On the basis of the scheme, the concrete model is prepared by adopting colored aggregate; the research and analysis on the filling and blocking performance of the rock-fill concrete specifically comprises the following steps: monitoring the pouring test process by using a high-speed camera; and according to the monitoring result of the high-speed camera, researching and analyzing the aggregate migration and blocking performance of the concrete model.
On the basis of the scheme, the concrete model is prepared by adopting transparent aggregate; the research and analysis on the filling and blocking performance of the rock-fill concrete specifically comprises the following steps: monitoring the process of the pouring test by using a particle image velocimetry method; and according to the monitoring result of the particle image velocimetry, researching and analyzing the flowing state and the filling effect of the concrete model.
On the basis of the scheme, the method further comprises the following steps: preparing different concrete models by changing the grading of the aggregate; in the pouring test, the pouring flow rate and the pouring position of the concrete model are determined according to the research requirements.
The embodiment of the invention provides a test device for researching the filling and blocking performance of rock-fill concrete, which is used for the method for researching the filling and blocking performance of the rock-fill concrete, and comprises the following steps: the device comprises a pouring box, a mould box and a monitoring mechanism; pour incasement portion and place concrete model and the bottom is connected with the honeycomb duct, the mould case is transparent structure, inside places the rockfill block model and is located the below of honeycomb duct, monitoring mechanism locates one side of mould case, be used for monitoring pouring experimental pouring process.
On the basis of the scheme, the monitoring mechanism comprises a high-speed camera or a particle image velocimetry assembly.
According to the method and the test device for researching the filling and blocking performance of the rock-fill concrete, provided by the embodiment of the invention, the transparent rock-fill block model is prepared for pouring test, so that a global visual perspective effect can be provided for the test research on the blocking mechanism, the flow characteristic and the filling state of the rock-fill concrete, the problem of unobservable pore state caused by the unobservable perspective of the rock-fill body is solved, the vacancy of the test method for researching the flow and filling performance of the rock-fill concrete can be filled, and the research on the performance of the rock-fill concrete is actively promoted.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic representation of a rockfill block model according to an embodiment of the present invention;
FIG. 2 is a schematic illustration of the placement of a rock-fill block pattern in a mold box according to an embodiment of the present invention;
FIG. 3 is a first schematic view of a test apparatus in an embodiment of the present invention;
FIG. 4 is a second schematic view of a test apparatus in an embodiment of the present invention.
Description of reference numerals:
wherein, 1, a rock-fill block model; 2. a mold box; 3. pouring a box; 4. a concrete form; 5. a flow guide pipe; 6. a high-speed camera; 7. a processor; 8. a laser; 9. a synchronizer; 10. a camera.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The embodiment of the invention provides a method for researching the filling and blocking performance of rock-fill concrete, which comprises the following steps: preparing a transparent rockfill block model by using a transparent material, as shown in figure 1; preparing slurry and mixing the slurry with aggregate to form a concrete model; pouring the concrete model in the rock-fill block model for a pouring test; according to the pouring test, the filling and blocking performance of the rock-fill concrete is researched and analyzed.
According to the method for researching the filling and blocking performance of the rock-fill concrete, the rock-fill block model and the concrete model are built, the concrete model is poured into the rock-fill block model for a pouring test, the pouring test is used for simulating the actual pouring process of the rock-fill concrete, and then the filling and blocking performance of the rock-fill concrete in the pouring process is researched and analyzed through the pouring test.
Further, the method proposes to prepare a transparent model of the rockfill mass. The transparent material can be adopted to prepare the rockfill block model, and then the rockfill block model which is integrally in a transparent state can be obtained. The prepared rockfill block model is in a transparent state. Furthermore, in the pouring test process, the flowing state of the concrete model in the pores of the rock-fill block model can be clearly observed, and the flowing state of the concrete model can be visually observed, so that the filling and blocking performance of the rock-fill concrete can be better researched and analyzed.
According to the method for researching the filling and blocking performance of the rock-fill concrete, the transparent rock-fill block model is prepared for pouring test, so that a globally visual perspective effect can be provided for the experimental research on the blocking mechanism, the flow characteristic and the filling state of the rock-fill concrete, the problem that the pore state cannot be observed due to the fact that the rock-fill body cannot be seen through perspective is solved, the vacancy of the experimental method for researching the flow and filling performance of the rock-fill concrete can be filled, and the positive promotion effect is played for the research on the performance of the rock-fill concrete.
Furthermore, the material of the rock-fill block model can be transparent resin material or transparent glass material, or can be other transparent materials, preferably the material with the hardness, density and other properties close to those of the actual rock-fill block. The slurry in the concrete model is the same as or similar to the flowing characteristics of the actual self-compacting concrete such as viscosity and the like, so that the actual self-compacting concrete is better simulated, and the test accuracy is improved.
On the basis of the above embodiment, further, the preparation process of the rock-fill block model specifically comprises: obtaining a three-dimensional model of the rockfill block body through a three-dimensional modeling or 3D scanning technology; and obtaining a rock-fill block model through 3D printing according to the three-dimensional model of the rock-fill block.
In order to be able to see through the whole pouring process, transparent resin materials can be used as raw materials of the rock-fill block body. A three-dimensional numerical model of the rockfill block can be established through a 3D scanning real rockfill body or a direct modeling method, and then the rockfill block is printed through a 3D printing technology. The printed transparent rockfill block model can be stacked in a transparent mold to form a transparent rockfill body, so that a pouring test can be conveniently carried out.
On the basis of the above embodiment, further, the slurry includes: clear carbomer slurry; the slurry comprises the following components in percentage by mass: 92.41-94.5% of deionized water, 0.30-0.35% of carbomer resin powder, 0.20-0.24% of neutral regulator triethanolamine and 5-7% of transparent glass beads.
The slurry is prepared by adopting carbomer gel as a substrate and adding glass beads to prepare transparent mortar with flow state similar to that of self-compacting mortar. Then selecting different aggregates according to different research directions: if the aggregate blocking phenomenon in the rock-fill concrete pouring process is researched, colored aggregate with better gradation is selected and can be a colored glass block; if the flow state of the self-compacting concrete in the process of pouring the rock-fill concrete is researched, the transparent aggregate with better gradation is selected, and the transparent aggregate can be a transparent glass block. After the aggregate is selected, the aggregate and the slurry are fully stirred to form the self-compacting concrete model.
Further, the slurry may be a transparent slurry and the aggregate may be a colored aggregate or a transparent aggregate. The slurry is set to be transparent, colored aggregate can be selected, the migration state of the aggregate can be conveniently observed in the pouring test process, and the blockage performance of the aggregate can be conveniently, clearly and visually researched. In addition, when the slurry is in a transparent state, the transparent aggregate is selected, so that the flowing state of the concrete model can be conveniently tracked and measured by utilizing a particle image velocimetry method.
Further, the slurry may also be set as a colored slurry as desired. In this case, the flow state of the entire concrete model can be visually observed and studied. The specific color of the slurry and aggregate can be flexibly selected according to the research purpose and direction without limitation. Wherein, the colored aggregate means that the aggregate has other colors which can be distinguished from transparent colors. Preferably the coloured aggregate is not white.
On the basis of the above embodiment, further, the preparation process of the slurry comprises: adding carbomer resin powder to deionized water; after the solution is completely dissolved, triethanolamine is added dropwise to adjust the solution to be neutral; standing for a certain time to obtain transparent carbomer gel; adding glass beads, uniformly stirring and performing vacuum suction to obtain transparent slurry.
On the basis of the above embodiment, further, according to the pouring test, the research and analysis of the filling and plugging performance of the rock-fill concrete includes: and analyzing the flowing state, filling effect and aggregate migration and blocking performance of the concrete model in the pores of the rock-fill block model in the pouring test process.
On the basis of the above embodiment, further, the concrete model is prepared by using colored aggregate; the research and analysis on the filling and blocking performance of the rock-fill concrete specifically comprises the following steps: monitoring the pouring test process by using a high-speed camera; and according to the monitoring result of the high-speed camera, researching and analyzing the aggregate migration and blocking performance of the concrete model.
On the basis of the above embodiment, further, the concrete model is prepared by using transparent aggregate; the research and analysis on the filling and blocking performance of the rock-fill concrete specifically comprises the following steps: monitoring the process of the pouring test by using a particle image velocimetry method; and according to the monitoring result of the particle image velocimetry, researching and analyzing the flowing state and the filling effect of the concrete model.
On the basis of the above embodiment, further, a method for studying the filling and plugging performance of the rock-fill concrete further comprises the following steps: preparing different concrete models by changing the grading of the aggregate; in the pouring test, the pouring flow rate and the pouring position of the concrete model are determined according to the research requirements.
And pouring the configured concrete model into the transparent rock-fill model according to the experimental requirements of the concrete model, namely according to the pouring flow rate and the pouring position set by the experiment. Wherein, if the aggregate blocking and migration phenomenon in the process of pouring the rock-fill concrete is researched, a high-speed camera is used for monitoring; if the flow state of the self-compacting concrete in the process of pouring the rock-fill concrete is researched, the flow state of the self-compacting concrete is tracked and measured by using a Particle Image Velocimetry (PIV).
The grading of the aggregates is the size of the aggregates and the proportion of the aggregates with different sizes. By varying the gradation of the aggregates, different concrete models can be prepared. Pouring tests can be carried out on different concrete models so as to research the filling and blocking performances of different rock-fill concretes. During a pouring test, the filling and blocking performance of the rock-fill concrete under different pouring parameters can be researched by changing the flow speed and the pouring position of the poured concrete model.
On the basis of the above embodiments, further, the present embodiment provides a test apparatus for studying filling and blocking performance of rock-fill concrete, and with reference to fig. 3 and 4, the test apparatus is used in the method for studying filling and blocking performance of rock-fill concrete according to any one of the above embodiments, and includes: the device comprises a pouring box 3, a mould box 2 and a monitoring mechanism; pour 3 inside concrete model 4 and the bottom of placing of case and be connected with honeycomb duct 5, mould case 2 is transparent structure, inside places rockfill block model 1 and is located honeycomb duct 5's below, and monitoring mechanism locates one side of mould case 2, is used for monitoring pouring experimental pouring process. Be equipped with the valve on the honeycomb duct 5, the accessible is adjusted the degree of opening of valve, controls the regulation to pouring the velocity of flow.
On the basis of the above embodiment, further, the monitoring mechanism includes a high-speed camera 6 or a particle image velocimetry assembly.
Referring to fig. 3, where the monitoring mechanism is a high speed camera 6, the high speed camera 6 is located at a side of the mould box 2 at a position convenient for recording the casting process, and the high speed camera 6 may be connected to a processor 7. The processor 7 may be a computer or the like capable of receiving the monitoring result of the high-speed camera 6.
Referring to fig. 4, when the monitoring mechanism is a particle image velocimetry assembly, the particle image velocimetry assembly comprises a laser 8, a synchronizer 9 and a camera 10. The laser 8 is located on one side of the mould box 2 and is able to monitor the position of the concrete model 4. The camera 10 is also located at the side of the mould box 2 to facilitate the shooting of the location of the casting process. The laser 8 and the camera 10 are simultaneously connected with the synchronizer 9, and the synchronizer 9 controls synchronous operation. The synchronizer 9 and the camera 10 are each connected to the processor 7. The processor 7 is also a computer or the like capable of receiving the monitoring results of the camera 10 and of regulating the operation of the synchronizer 9.
On the basis of the above embodiment, further, aiming at the fact that no technology capable of visually observing and measuring the flowing blockage state of the self-compacting concrete in the rockfill gap by a complete perspective method exists at present, the embodiment provides a new method for experimental research of the rockfill concrete.
The embodiment provides a method for researching the filling and blocking performance of rock-fill concrete based on a transparent slurry technology. A rock-fill block model 1 is established by using a transparent resin material through a 3D printing technology, transparent slurry with the same flowing characteristic as self-compacting concrete is prepared, and the blocking mechanism and the flowing characteristic of the rock-fill concrete are respectively researched through a high-speed camera 6 and a Particle Image Velocimetry (PIV). The method can provide a global visual perspective effect for experimental study on the blocking mechanism, the flow characteristic and the filling state of the rock-fill concrete, and provides a new study method for the study on the flow performance and the filling performance of the rock-fill concrete.
The method comprises the following specific operation processes:
and (3) establishing a transparent rockfill block model 1. The input data is formed by 3D scanning the outline of the body of the rock in the rock-fill concrete used, using three-dimensional modeling software (GID or other modeling software) to build a three-dimensional geometric model as desired, or by using 3D scanning techniques. By using 3D printing technology, the rockfill mass is printed, as shown in fig. 1. And the printed transparent rockfill block model 1 is stacked in a transparent mould box 2 (the material of the mould box 2 is transparent PVC plate or glass plate) to form a transparent rockfill body, as shown in figure 2.
And (4) preparing transparent slurry. Transparent self-compacting concrete is prepared by using a transparent mortar mixture with rheological properties similar to those of mortar as a transparent mortar substrate and then adding a glass block as a coarse aggregate. The preparation method comprises the following steps of 92.41-94.5% of deionized water, 0.30-0.35% of 940 series carbomer resin powder, 0.20-0.24% of neutral regulator triethanolamine, 5-7% of transparent glass beads and a transparent glass block or colored glass block with certain gradation.
The preparation method comprises the following steps: adding carbomer resin powder into deionized water, dropwise adding triethanolamine to adjust to neutrality after completely dissolving, standing for 5-10 min to obtain transparent carbomer gel, adding transparent glass beads and glass blocks, stirring uniformly, vacuum-sucking, and removing internal bubbles. According to different research purposes, if the aggregate blocking phenomenon in the rock-fill concrete pouring process is researched, a colored glass block body with better gradation is selected; if the flow state of the self-compacting concrete in the process of pouring the rock-fill concrete is researched, a transparent glass block body with better gradation is selected. The standing time is not limited, and is specifically set according to the type of the selected carbomer resin powder, so that transparent carbomer gel can be obtained.
And monitoring the pouring process. And pouring the prepared transparent slurry into the transparent rockfill according to the experimental requirements. Wherein, if the aggregate blocking and migration phenomenon in the process of pouring the rock-fill concrete is researched, a high-speed camera 6 is used for monitoring, as shown in figure 3; if the flow state of the self-compacting concrete in the process of pouring the rock-fill concrete is researched, the flow state is tracked and measured by using a Particle Image Velocimetry (PIV), as shown in figure 4.
And (5) processing the post data. The monitoring result of the experiment, the free surface of the fluid in the result, the migration state of the aggregate and the flowing characteristics of the cross section are processed by the later data, so that the flowing state of the self-compacting concrete in the rock-fill pore, the filling effect and the phenomenon of aggregate migration blockage are analyzed according to the requirements.
The embodiment provides a method for researching the filling and blocking performance of rock-fill concrete based on a transparent slurry technology. The complicated boundary of the rockfill block can be really restored by using the 3D printed rockfill block model 1, and the problem that the flowing state of the pore cannot be observed due to the fact that the rockfill body cannot be seen through due to the transparency of materials can be solved. The aggregate migration condition in the holes of the rock-fill body can be visually observed by combining the configured transparent self-compacting concrete. In the later monitoring process, the high-speed camera 6 and a Particle Image Velocimetry (PIV) are introduced, so that the migration blocking state of the aggregate in the fluid and the flow characteristic of the fluid can be more accurately monitored.
The embodiment provides a method for researching the filling and blocking performance of rock-fill concrete based on a transparent slurry technology. The method mainly comprises the following steps of firstly, printing the rock-fill body in a required complex form by using a transparent resin material through a 3D printing technology, and then stacking the rock-fill body into a transparent template; and then preparing transparent slurry (carbomer gel, glass microspheres and glass aggregate) with the same flow characteristics as the self-compacting concrete, wherein the colored glass is used as the coarse aggregate of the transparent slurry when the blocking phenomenon of the aggregate in the pouring process in the self-compacting concrete material is researched (the transparent glass is used as the coarse aggregate of the transparent slurry when the hydrodynamic characteristics of the self-compacting concrete material are researched). And finally, tracking and researching the migration condition and the final distribution state of the aggregates in the rockfill pores by using a high-speed camera 6 (the flow characteristics of the transparent slurry in the rockfill pores are determined by tracking by using a Particle Image Velocimetry (PIV)).
The method is suitable for researching the filling performance of the rock-fill concrete in hydraulic engineering, and particularly relates to the research field of researching the filling and blocking mechanism of the rock-fill concrete by an experimental method. With the popularization and application of the novel large-volume concrete material, the method can provide a new method for the research of the flow characteristic, the filling performance and the blocking phenomenon in the pouring process of the rock-fill concrete, and has positive effects on the research of the filling and blocking mechanism of the rock-fill concrete and the popularization and application of the material. The method can fill the gap of the experimental method for researching the flow filling performance of the rock-fill concrete, and can visually observe the flow state, the blocking phenomenon and the final filling compactness of the self-compacting concrete in the rock-fill pores, thereby accelerating the research and application of the popularization of the rock-fill concrete.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. A method for researching the filling and blocking performance of rock-fill concrete is characterized by comprising the following steps:
preparing a transparent rockfill block model by adopting a transparent material;
preparing slurry and mixing the slurry with aggregate to form a concrete model;
pouring the concrete model in the rock-fill block model for a pouring test;
according to a pouring test, researching and analyzing the filling and blocking performance of the rock-fill concrete;
the slurry is transparent slurry, and the aggregate is colored aggregate or transparent aggregate;
according to the pouring test, the research and analysis of the filling and blocking performance of the rock-fill concrete comprises the following steps:
and analyzing the flowing state, filling effect and aggregate migration and blocking performance of the concrete model in the pores of the rock-fill block model in the pouring test process.
2. The method for researching the filling and blocking performance of the rock-fill concrete according to claim 1, wherein the preparation process of the rock-fill block model is as follows:
obtaining a three-dimensional model of the rockfill block body through a three-dimensional modeling or 3D scanning technology;
and obtaining a rock-fill block model through 3D printing according to the three-dimensional model of the rock-fill block.
3. The method of studying rockfill concrete filling plugging performance of claim 1, wherein the slurry comprises: clear carbomer slurry; the slurry comprises the following components in percentage by mass: 92.41-94.5% of deionized water, 0.30-0.35% of carbomer resin powder, 0.20-0.24% of neutral regulator triethanolamine and 5-7% of transparent glass beads.
4. The method for researching the filling and plugging performance of the rock-fill concrete according to claim 3, wherein the preparation process of the slurry comprises the following steps:
adding carbomer resin powder to deionized water;
after the solution is completely dissolved, triethanolamine is added dropwise to adjust the solution to be neutral;
standing for a certain time to obtain transparent carbomer gel;
adding glass beads, uniformly stirring and performing vacuum suction to obtain transparent slurry.
5. The method for studying the filling plugging performance of the rock-fill concrete according to claim 1, wherein the concrete model is prepared by using colored aggregate;
the research and analysis on the filling and blocking performance of the rock-fill concrete specifically comprises the following steps:
monitoring the pouring test process by using a high-speed camera;
and according to the monitoring result of the high-speed camera, researching and analyzing the aggregate migration and blocking performance of the concrete model.
6. The method for studying the filling plugging performance of the rock-fill concrete according to claim 1, wherein the concrete model is prepared by using transparent aggregate;
the research and analysis on the filling and blocking performance of the rock-fill concrete specifically comprises the following steps:
monitoring the process of the pouring test by using a particle image velocimetry method;
and according to the monitoring result of the particle image velocimetry, researching and analyzing the flowing state and the filling effect of the concrete model.
7. The method for studying the filling and plugging performance of the rock-fill concrete according to claim 1, further comprising:
preparing different concrete models by changing the grading of the aggregate;
in the pouring test, the pouring flow rate and the pouring position of the concrete model are determined according to the research requirements.
8. A test device for studying the filling and plugging performance of the rock-fill concrete, which is used for the method for studying the filling and plugging performance of the rock-fill concrete according to any one of the claims 1 to 7, and comprises: the device comprises a pouring box, a mould box and a monitoring mechanism;
pour incasement portion and place concrete model and the bottom is connected with the honeycomb duct, the mould case is transparent structure, inside places the rockfill block model and is located the below of honeycomb duct, monitoring mechanism locates one side of mould case, be used for monitoring pouring experimental pouring process.
9. The test device for researching the filling and blocking performance of the rock-fill concrete according to claim 8, wherein the monitoring mechanism comprises a high-speed camera or a Particle Image Velocimetry (PIV) component.
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| CN113533146B (en) * | 2021-07-09 | 2022-07-08 | 清华大学 | Rockfill simulation analysis method and system based on image recognition technology |
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| CN101893538B (en) * | 2010-07-16 | 2011-11-30 | 中南大学 | Self-compacting concrete filling performance testing device |
| CN106007552A (en) * | 2016-05-12 | 2016-10-12 | 上海朵颐新材料科技有限公司 | Cement-based seamless transparent concrete and preparing method thereof |
| CN106053168B (en) * | 2016-05-20 | 2017-10-10 | 长安大学 | Concrete based on 3D printing technique carefully sees the method for visualizing of three-phase structure |
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| CN108984829B (en) * | 2018-06-06 | 2021-02-02 | 中国农业大学 | Calculation method and system for stacking process of rock-fill concrete rock-fill body |
| CN108896746B (en) * | 2018-07-06 | 2021-03-02 | 中南大学 | Quantitative detection device and method for defects of self-compacting concrete filling layer of ballastless track |
| CN110006896B (en) * | 2019-03-04 | 2020-11-17 | 华中科技大学 | Virtual detector and detection method for concrete performance |
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