CN113211607B - Structured adhesive contact interface sample preparation device and preparation method thereof - Google Patents
Structured adhesive contact interface sample preparation device and preparation method thereof Download PDFInfo
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- CN113211607B CN113211607B CN202110430517.4A CN202110430517A CN113211607B CN 113211607 B CN113211607 B CN 113211607B CN 202110430517 A CN202110430517 A CN 202110430517A CN 113211607 B CN113211607 B CN 113211607B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/0094—Moulds for concrete test samples
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/04—Producing shaped prefabricated articles from the material by tamping or ramming
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/0002—Auxiliary parts or elements of the mould
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
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Abstract
The invention discloses a device and a method for preparing a structured cementing contact interface sample, which are used for researching the interface characteristics of the structured cementing sample and a granular material. The preparation device comprises a base, a lower mold, an upper mold, a ring stacking group, a compaction component and a pouring component; the lower die, the ring stacking group and the upper die are provided with cavities for containing granular materials, and the lower die, the ring stacking group and the upper die are limited in mutual displacement through limiting pieces; compacting the particulate material with compacting means; the pouring component is used for pouring a cementing material into gaps between the lower mold and the granular materials in the ring stacking group to form a structural cementing body. And forming a contact interface between the granular material and the structured cementing body in the cavity of the ring-stacked assembly in a mode of compacting the granular material in layers and pouring the cementing material once or repeatedly to prepare a structured cementing contact interface sample. The method can provide guarantee for developing a large amount of basic research of the structured cementing material in the later period.
Description
Technical Field
The invention relates to the technical field of engineering material preparation, in particular to a structured cementing contact interface sample preparation device and a preparation method thereof.
Background
The high-performance self-compaction cement paste, the self-compaction cement mortar and the self-compaction concrete have good flowing performance, and no vibration is needed to be applied in the pouring process, so that tiny pores among particles can be densely filled only by means of dead weight. The self-compacting cement-based cementing material is a material commonly used in engineering construction of houses, bridges, dam bodies, roadbeds and the like, and meanwhile, the self-compacting cement-based cementing material is widely applied to reinforcement engineering of side slopes, disease dams, foundations, tunnels and the like. The high-performance cement-based cementing material has the advantages of simple construction, small engineering amount, low engineering cost and the like.
The applicant previously filed a structured cementitious particulate material and a method for its preparation (application No.: CN 201810284687.4). According to years of research of the applicant, the structural cementing material with a certain space structure can be formed in the granular particles by controlling the fluidity, the viscosity and the pouring amount of the high-performance self-compacting cement-based material, wherein the shearing strength, the elastic modulus and the deformation modulus of the cementing body-granular particle composite material can be obviously improved through the hydration action of the cement-based material, and meanwhile, the connectivity and the water permeability of the original pore structure of the granular particles are kept. The structured cementing material is a novel composite material between the granular bodies and the continuum, can effectively improve the indexes such as deformation modulus, compressive strength and the like while keeping good deformability and destructive ductility of soil and stone materials, and is a novel environment-friendly building material in the fields of water conservancy and hydropower, ocean engineering and the like.
Complex interaction exists between a cementing body-scattered particle body composite structure in the structured cementing material, the property of a contact interface between the cementing body and the scattered particle body in the composite structure needs to be systematically researched, the deformation and damage mechanism of the composite structure is disclosed, and the conventional sample preparation device is difficult to meet the sample preparation requirement.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a device and a method for preparing a structured cementing contact interface sample, which can form structured cementing contact interfaces with different thicknesses and various forms and provide guarantee for developing a large amount of basic research of structured cementing materials.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a device for preparing a structural adhesive bonding contact interface sample, which is characterized by comprising a base, a lower die, an upper die, a ring stacking group, a compaction component and a pouring component, wherein the lower die is arranged on the base; the middle parts of the lower die, the ring stacking group and the upper die are respectively provided with a cavity for containing granular materials, the lower die is supported on the base, the ring stacking group is arranged between the lower die and the upper die, and the lower die, the ring stacking group and the upper die limit the displacement of each other through limiting pieces; the compaction component is used for compacting the granular materials in each cavity; and the pouring component is used for pouring a cementing material into a gap between the particle materials in the lower die and the cavity of the ring stack group so as to form a structural cementing contact surface between cementing bodies formed by the particle materials and the cementing material in the cavity of the ring stack group, thereby obtaining a structural cementing contact interface sample.
Further, after the preparation of the structured cementing contact interface sample is completed, the limiting part is taken out, and the shear of the structured cementing contact surface is realized through the horizontal displacement generated between the stacked rings by the driving force applied to the stacked ring group.
Furthermore, hit real part include with the lower part mould, fold ring group and upper portion mould's interior value footpath assorted hit real backing plate, be fixed in hit real backing plate upper surface's guide bar and fixed cover locate hit real hammer on the guide bar, through the guide bar drives hit real backing plate and hit real hammer and reciprocate.
Further, the pouring component comprises a pouring barrel and a pouring baffle; the pouring cylinder is arranged above the upper die, a plurality of slurry through holes are formed in the bottom of the pouring cylinder, and grooves capable of enabling the pouring baffle to be embedded into and pulled out of the grooves are formed in the bottom of the side wall of the pouring cylinder.
The second aspect of the present invention provides a method for preparing a structured cemented contact interface sample by using the above structured cemented contact interface sample preparation apparatus, which is characterized by comprising the following steps:
s1, measuring physical parameters of the used granular materials, including density, porosity ratio and friction angle, and calculating the mass of the required granular materials; determining the fluidity and viscosity of the cementitious material; determining a cementing area of the granular material and a grouting amount of the cementing material required for forming the cementing body;
s2, loading the granular material of the cementing body part in a layered compaction mode, and controlling the loading height, uniformity and compactness; filling the cementing area with the cementing material, wherein the cementing material binds the granular material on the flow path into the cementing body, and the part of the cementing body can be completely cemented or partially cemented;
and S3, loading the bulk and granular body part on the cementing body in a layered compaction mode, and controlling the height, uniformity and compactness of the loaded sample to obtain the bulk and granular body part of the structural cementing contact interface sample, wherein the bulk and granular body are contacted in the stacked ring group to form the structural cementing contact interface.
Further, the cementing material is a high-performance cement-based cementing material; the cementing body and the granular particles are mutually contacted in the ring stack group, a contact interface of a cementing body-granular particle composite structure is formed by pouring a cementing material, and a structured cementing contact interface with different thicknesses is formed by changing the thickness of the ring stack group; the pouring mode and the pouring position of the cementing material are changed to form a structural cementing contact interface with various forms, and the cementing body part can be formed by pouring in a single pouring mode or multiple pouring modes, and can also be formed by pouring in a single-point pouring mode or a multi-point pouring mode.
Compared with the prior art, the invention has the following characteristics and beneficial effects:
the invention provides a preparation device and a preparation method of a structured cementing contact interface sample for the first time, which are specially designed for researching the characteristics of the interface of the structured cementing sample and a granular material, can form the structured cementing contact interfaces with different thicknesses and various forms by changing the thickness of a ring stack and the pouring mode of the cementing material, further explore the interaction characteristics of a cementing body and a granular body and the influence rule of each factor on the deformation characteristics through a physical test, disclose the deformation and damage mechanism of the structured cementing contact interface under different conditions, and provide guarantee for the later development of the basic research and the practical engineering application of the structured cementing material.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a schematic diagram of a structured cemented contact interface sample preparation apparatus according to one embodiment of the invention;
FIG. 2 is a schematic structural diagram of a ring stack apparatus according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of a sample preparation device and a schematic process for compacting according to another embodiment of the present invention;
fig. 4 is a schematic cross-sectional structure diagram and a schematic pouring process diagram of a sample preparation device according to another embodiment of the present invention;
fig. 5 is a flow chart of a method of making a structured cemented contact interface sample according to one embodiment of the invention.
Reference numerals:
1: a limiting member; 2: a lower mold; 3: an upper mold; 4: a base; 5: a ring stacking group; 51: a laminated ring with a groove; 511: a groove; 52: a ring pile with holes; 521: an aperture; 53: a ball bearing; 6: compacting the backing plate; 7: a compaction hammer; 8: a guide bar; 9: pouring a cylinder; 10: pouring a baffle; 11: a particulate material; 12: structured cemented contact surfaces.
Detailed Description
The following examples of the present invention are described in detail, and it will be understood by those skilled in the art that the following examples are intended to illustrate the present invention, but should not be construed as limiting the present invention. Unless otherwise indicated, specific techniques or conditions are not explicitly described in the following examples, and those skilled in the art may follow techniques or conditions commonly employed in the art or in accordance with the product specifications.
In a first aspect of the invention, an apparatus for preparing a structured glue contact interface sample is provided.
According to an embodiment of the invention, referring to fig. 1, the structural cementing contact interface sample preparation device comprises a base 4, a lower mold 2, an upper mold 3, a ring-overlapping group 5, a compaction component and a pouring component; wherein, the middle parts of the lower die 2, the ring stack 5 and the upper die 3 are respectively provided with a cavity for containing the granular material 11, the lower die 2 is supported on the base 4, the ring stack 5 is arranged between the lower die 2 and the upper die 3, and the lower die 2, the ring stack 5 and the upper die 3 are limited in displacement by the limiting piece 1; the compaction component is used for compacting the granular materials in each cavity; the pouring component is used for pouring high-performance cement-based cementing materials into gaps between the particle materials in the cavity of the lower die 2 and the ring stack 5 so as to form a structural cementing contact surface 12 between cementing bodies formed by the particle materials and the high-performance cement-based cementing materials in the cavity of the ring stack 5, and obtain a structural cementing contact interface sample.
A grout stopping piece (in the embodiment, a rubber plate is adopted as the grout stopping piece) is adhered to the surface of the base 4, the lower die 2 is installed on the upper portion of the base 4, a groove is formed in the upper surface of the lower die 2, the bottom of the ring stacking group 5 is installed on the groove, a groove is also formed in the lower surface of the upper die 3, and the top of the ring stacking group 5 is installed in the groove. In order to ensure the stability of the preparation device in the working process, the lower mold 2, the ring stacking group 5 and the upper mold 3 are connected through the limiting part 1, in this embodiment, the limiting part 1 is a positioning pin rod, and positioning pin holes are formed in corresponding positions around the lower mold 2, the ring stacking group 5 and the upper mold 3 and used for penetrating through the corresponding positioning pin rods to realize the connection and fixation of the lower mold 2, the ring stacking group 5 and the upper mold 3. After the device is assembled, the rubber inner membrane is adhered to the inner surface of the sample preparation device. It should be noted that all "lower" in this document means in the direction of gravity, and "upper" means the direction opposite to the direction of gravity.
According to the embodiment of the present invention, the lower mold 2 and the upper mold 3 are both split molds, each being a hollow mold formed by splicing together 2 split molds, the shape of which is not particularly limited, specifically, such as a cross-sectional shape of a circle, a square, etc., and the 2 split molds of the split molds are connected by flanges and bolts.
According to an embodiment of the invention, referring to fig. 2, the ring stack 5 is installed above the lower die 2 and comprises a grooved ring stack 51 and a perforated ring stack 52, and balls 53 capable of rolling in grooves 511 of the grooved ring stack 51 are placed in holes 521 of the perforated ring stack 52, so that the friction resistance between the ring stacks during the test can be effectively reduced. After the preparation of the structural cementing contact interface sample is completed, the limiting part 1 is taken out, and the shear of the structural cementing contact surface is realized through the horizontal displacement generated between the stacked rings by applying a driving force to the stacked ring group 5. The inner diameters of the ring stack 5, the lower die 2 and the upper die 3 are all matched to each other, and specifically, the inner diameters of the ring stack 5, the lower die 2 and the upper die 3 are not less than 300mm, so as to eliminate the influence of the boundary effect as much as possible. The overall thickness of the stack 5 is at least 100mm, taking into account the thickness of the shear deformation zone at the contact interface, and the thickness of the grooved and holed stacks 51, 52 does not exceed 5mm, to more accurately reflect the deformation of the sample at the respective heights.
In some embodiments of the present invention, referring to fig. 3, the compaction unit includes a compaction pad 6 matching the inner diameters of the lower mold 2, the ring stack 5, and the upper mold 3, a guide rod 7 fixed on the upper surface of the compaction pad 6, and a compaction hammer 8 fixedly sleeved on the guide rod 7, wherein the compaction pad 6 can move up and down inside the lower mold 2, the ring stack 5, and the upper mold 3, the lower end of the guide rod 7 is connected to the compaction pad 6, the compaction hammer 8 is provided with a through hole, the guide rod 7 passes through the through hole, and the compaction hammer 8 can move up and down on the guide rod. Hit real hammer 8 through reciprocating repeatedly and can make particulate material closely knit pile up fast, be favorable to follow-up even pouring system appearance to improve the system appearance efficiency of cementite sample and reduce the discreteness of sample.
In other embodiments of the present invention, referring to fig. 4, a casting component is placed above the upper mold 3, the casting component comprises a casting cylinder 9 and a casting baffle 10, the bottom of the casting cylinder 9 is provided with a plurality of slurry through holes, the bottom of the side wall of the casting cylinder 9 is provided with a groove for inserting and extracting the casting baffle 10, and the casting baffle 10 is inserted into the groove of the side wall of the casting cylinder 9. In the research process, the applicant finds that after the granular materials are layered and densely stacked, the compaction part is taken down, the pouring part is placed above the upper mold 3, the high-performance cement-based cementing material is poured into the pouring cylinder 9, the pouring baffle 10 is drawn out, and slurry flows into gaps between the granular materials in the cavity of the lower mold 2 and the cavity of the ring stack 5 from a plurality of slurry permeable holes in the bottom of the pouring cylinder 9, so that a cementing body sample can be uniformly poured.
In another aspect of the invention, a method of preparing a structured glue contact interface sample is provided. According to an embodiment of the present invention, referring to fig. 5, the preparation method includes the steps of:
s1, measuring physical parameters of the used granular material, including density, porosity ratio, friction angle and the like, and calculating the mass of the required granular material; determining the fluidity and viscosity of the high-performance cement-based cementing material; determining a cementing area of the granular material and a grouting amount of a high-performance cement-based cementing material required for forming a cementing body;
s2, loading the granular material of the cementing body part in a layered compaction mode, and controlling the loading height, uniformity and compactness; filling a high-performance cement-based cementing material into the cementing area, wherein the high-performance cement-based cementing material bonds the granular material on the flow path into a cementing body, and the part of the cementing body can be completely cemented or partially cemented;
s3, loading the bulk and granular body part on the cementing body in a layered compaction mode, controlling the height, uniformity and compactness of the loaded sample to obtain the bulk and granular body part of the structural cementing contact interface sample, and contacting the bulk and the cementing body in a ring stack group to form the structural cementing contact interface.
Further, the high-performance cement-based cementing material in the embodiment of the invention is high-performance self-compacting cement paste, high-performance self-compacting cement mortar or high-performance self-compacting concrete.
Furthermore, the expansion degree of the high-performance self-compacting cement paste in the embodiment of the invention is 220-320 mm, and the V funnel value is 1.5-2.5 s; the high-performance self-compacting cement mortar has an expansion degree of 220-320 mm and a V funnel value of 5-12 s; the high-performance self-compacting concrete has the expansibility of 550-750 mm, the casting slump of 230-290 mm and the V funnel value of 8-25 s.
Further, the flow properties and strength parameters of self-compacting cement-based cementitious materials can be adjusted by the incorporation of stone dust.
Further, the cementing body and the bulk particles are mutually contacted in the ring stack group, a contact interface of a cementing body-bulk particle composite structure is formed by pouring a high-performance cement-based cementing material, and a structured cementing contact interface with different thicknesses is formed by changing the thickness of the ring stack group.
Furthermore, by changing the pouring mode and the pouring position of the high-performance cement-based cementing material to form a structural cementing contact interface with various forms, the cementing body part can be formed by single pouring or multiple pouring, and can also be formed by single-point pouring or multi-point pouring.
According to the embodiment of the invention, the pouring form of the cementing body can adopt one-time pouring or layered and partitioned multiple times of pouring, so that the integral performance of the part of the cementing body finished by one-time pouring is better, and the cementing body poured by layers and partitioned according to actual needs can regulate and control different contact interface strengths of each region of each layer. The grouting point position of the cementing body pouring can adopt single-point pouring or multi-point and multi-time pouring, the integral performance of the part of the cementing body poured in one time is better, and the cementing body poured in multi-point and multi-time pouring can reflect different contact interface forms according to actual needs.
The invention will now be described with reference to specific examples, which are intended to be illustrative only and not to be limiting in any way.
Example 1
In the embodiment, the low-strength structural cementing contact interface sample is prepared, and the design method of the structural cementing contact interface is suitable for rock-fill dam reinforcement engineering and is also suitable for construction engineering such as dikes, roadbeds and the like. The particle materials are crushed stones with the particle size of 5-8 mm, the high-performance cement-based cementing materials are self-compacting cement paste with the expansion degree of 270 +/-10 mm and the V funnel value of 1.8 +/-0.2 s, and the porosity of the cementing particle materials is about 35%. The method comprises the following specific steps:
(1) selecting self-compacting cement paste for pouring, and determining that the deposition amount of the expected cement paste in the cemented granule is 5%;
(2) and determining the expansion degree of the high-performance cement-based clean slurry corresponding to the expected 5% cementing material deposition amount to be 260-280mm according to the deposition amount of the high-performance cement clean slurry after flowing through the gravel material, and further determining the mixing proportion of the cement clean slurry.
(3) High-performance cement paste is poured into the gravel material at a single point position, the high-performance cement paste flows along the holes of the gravel material under the action of self weight, and partial cement paste is deposited in the holes of the gravel material, so that the low-strength structural cementite can be obtained.
(4) And continuously adopting a layered compaction mode to load the sample, and controlling the height, uniformity and compactness of the loaded sample to obtain a granular body part of the structural cementing contact interface sample, wherein the granular body is contacted with the cementing body to form a low-strength structural cementing contact interface.
Example 2
In the embodiment, a quincunx pile-shaped structural cementing contact interface sample is prepared, and the design method of the structural cementing contact interface is suitable for gravel pile reinforcement engineering. The particle material is crushed stone with the particle size of 5-8 mm, the high-performance cement-based cementing material is self-compacting cement paste with the expansion degree of 250 +/-10 mm and the V funnel value of 2.0 +/-0.2 s, and the porosity of the cementing particle material is about 38%. The method comprises the following specific steps:
(1) selecting self-compacting cement paste for pouring, and determining that the deposition amount of the expected cement paste in the cemented granule is 8%;
(2) and determining the expansion degree of the high-performance cement-based clean slurry corresponding to the expected 8% cementing material deposition amount to be 240-260mm according to the deposition amount of the high-performance cement clean slurry after flowing through the gravel material, and further determining the mixing proportion of the cement clean slurry.
(3) The self-compaction cement paste is poured into the gravel material, the poured point position adopts a quincuncial pile arrangement form to be poured, the high-performance cement paste flows along the hole gaps of the gravel material under the action of self weight, and partial cement paste is deposited in the hole gaps of the gravel material, so that a cementing body in the form of a quincuncial pile can be obtained.
(4) And continuously adopting a layered compaction mode to load the sample, and controlling the height, uniformity and compactness of the loaded sample to obtain a granular body part of the structured cementing contact interface sample, wherein the granular body is contacted with the cementing body to form the cementing contact interface.
In the description of the present invention, it is to be understood that the terms "thickness," "upper," "lower," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the purpose of convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the same embodiment or example must be referred to by the same schematic representation of the above terms. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (9)
1. A structured cementing contact interface sample preparation device is characterized by comprising a base, a lower mold, an upper mold, a ring stacking group, a compaction component and a pouring component; the middle parts of the lower die, the ring stacking group and the upper die are respectively provided with a cavity for containing granular materials, the lower die is supported on the base, the ring stacking group is arranged between the lower die and the upper die, and the lower die, the ring stacking group and the upper die limit the displacement of each other through limiting pieces; the compaction component is used for compacting the granular materials in each cavity; the pouring component is used for pouring a cementing material into a gap between the particle materials in the cavity of the lower die and the ring stack group so as to form a structural cementing contact surface between cementing bodies formed by the particle materials and the cementing material in the cavity of the ring stack group and obtain a structural cementing contact interface sample; the ring-folding group comprises a plurality of belt-grooved ring-folding rings and belt-grooved ring-folding rings which are alternately arranged in sequence, and a plurality of balls which are arranged in the holes of the belt-grooved ring-folding rings and can roll in the grooves of the belt-grooved ring-folding rings; the upper surface of the lower die is provided with a groove for placing the stacked ring at the bottom of the stacked ring set, and the lower surface of the upper die is provided with a groove for placing the stacked ring at the top of the stacked ring set.
2. The apparatus of claim 1, wherein after the preparation of the structured adhesive contact interface sample is completed, the retaining member is removed, and the shear on the structured adhesive contact surface is achieved by a horizontal displacement between the stacked rings due to the driving force applied to the stacked ring set.
3. The structured cementitious contact interface specimen preparation device of claim 1, wherein the stack of stacked rings has a thickness of at least 100mm, and the thickness of the stacked rings with grooves and the stacked rings with holes does not exceed 5 mm; the inner diameters of the lower die, the ring stack and the upper die are at least 300 mm.
4. The structured cementitious contact interface specimen preparation device of claim 1, wherein the retainer is a dowel bar connected between the lower mold, the set of stacked rings, and the upper mold.
5. The structured cementitious contact interface specimen preparation device of claim 1, wherein the lower mold and the upper mold are both split molds; and a slurry stopping piece is arranged at the contact position of the base and the granular material.
6. The apparatus for preparing a structured cementitious contact interface specimen as claimed in claim 1, wherein the compacting member comprises a compacting plate matching with the inner diameters of the lower mold, the stack of rings and the upper mold, a guide rod fixed on the upper surface of the compacting plate and a compacting hammer fixedly sleeved on the guide rod, and the compacting plate and the compacting hammer are driven by the guide rod to move up and down.
7. The structured cementitious contact interface specimen preparation device of claim 1, wherein the casting component comprises a casting barrel and a casting baffle; the pouring cylinder is arranged above the upper die, a plurality of slurry through holes are formed in the bottom of the pouring cylinder, and grooves capable of enabling the pouring baffle to be embedded into and pulled out of the grooves are formed in the bottom of the side wall of the pouring cylinder.
8. A method for preparing a structured cementing contact interface sample by using the structured cementing contact interface sample preparation device according to any one of the claims 1 to 7, which is characterized by comprising the following steps:
s1, measuring physical parameters of the used granular materials, including density, porosity ratio and friction angle, and calculating the mass of the required granular materials; determining the fluidity and viscosity of the cementitious material; determining a cementing area of the granular material and a grouting amount of the cementing material required for forming the cementing body;
s2, loading the granular material of the cementing body part in a layered compaction mode, and controlling the loading height, uniformity and compactness; filling the cementing area with the cementing material, wherein the cementing material bonds the granular material on the flow path into a cementing body which is completely cemented or partially cemented;
and S3, loading the bulk and granular body part on the cementing body in a layered compaction mode, and controlling the height, uniformity and compactness of the loaded sample to obtain the bulk and granular body part of the structural cementing contact interface sample, wherein the bulk and granular body are contacted in the stacked ring group to form the structural cementing contact interface.
9. The method according to claim 8, wherein the cementitious material is a high performance cement-based cementitious material;
the cementing body and the granular particles are mutually contacted in the ring stack group, a contact interface of a cementing body-granular particle composite structure is formed by pouring a cementing material, and a structured cementing contact interface with different thicknesses is formed by changing the thickness of the ring stack group; the pouring mode and the pouring position of the cementing material are changed to form a structural cementing contact interface with various forms, and the cementing body part is formed by pouring in a single pouring mode or multiple pouring modes, or is formed by pouring in a single-point pouring mode or multiple-point pouring mode.
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| DE602004011688D1 (en) * | 2004-03-05 | 2008-03-20 | Egomedical Swiss Ag | ANALYSIS TEST SYSTEM FOR DETERMINING THE CONCENTRATION OF AN ANALYTE IN A PHYSIOLOGICAL LIQUID |
| CN203849072U (en) * | 2014-04-29 | 2014-09-24 | 湖南大学 | Sample blank production device for performance test of friction between anchor or pile and soil interfaces |
| CN105571957B (en) * | 2016-02-02 | 2018-10-23 | 河海大学 | Measure the large-scale model case and application method of coarse-grained soil shearing strength |
| CN107825567B (en) * | 2017-11-21 | 2023-09-26 | 清华大学 | Sample preparation device for cemented granular material and method for preparing cemented granular material sample |
| CN207832592U (en) * | 2018-02-01 | 2018-09-07 | 福建省地质工程勘察院 | A kind of stacked ring type ring suitable for stacked ring type shearing test cuts box |
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2021
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