CN109001012A - A kind of device for simulating high ductility cement-base composite material multiple crack growth - Google Patents
A kind of device for simulating high ductility cement-base composite material multiple crack growth Download PDFInfo
- Publication number
- CN109001012A CN109001012A CN201810538603.5A CN201810538603A CN109001012A CN 109001012 A CN109001012 A CN 109001012A CN 201810538603 A CN201810538603 A CN 201810538603A CN 109001012 A CN109001012 A CN 109001012A
- Authority
- CN
- China
- Prior art keywords
- composite material
- blade
- crack
- high ductility
- base composite
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- G01N1/36—Embedding or analogous mounting of samples
-
- 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
- G01N1/36—Embedding or analogous mounting of samples
- G01N2001/366—Moulds; Demoulding
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a kind of devices for simulating high ductility cement-base composite material multiple crack growth, including sample preparation mold, the middle position of the sample preparation mold left side plate is equipped with groove, upper surface is equipped with blade holder, the left and right sides of the blade holder bottom is equipped with concave shape supporting plate, inside is equipped with several prefabricated crack blades and fracture interval controls partition, and the prefabricated crack blade and fracture interval control partition can match with concave shape supporting plate and groove.The present invention can control partition by the prefabricated crack blade (specifically including blade thickness, height) of selection appropriate size and the crack interval of suitable thickness to simulate the crack of different parameters, prefabricated fracture width minimum is up to 40 μm, spacing-controllable system is in millimeter rank, so as to effectively simulate the multiple crack growth behavior of high ductility cement-base composite material, the durable Journal of Sex Research for the high ductility cement-base composite material cement-based material that cracks provides technical support.
Description
Technical field
The invention belongs to civil engineering material technical field more particularly to a kind of high ductility cement-base composite material of simulation are more
Stitch the device of cracking.
Background technique
Cement-based material can crack under the effect of stretch bending load, and crack can invade cement-based material for various erosion carbon dioxides
Inside provides channel, influences materials ' durability, and the durability of life-threatening property safety, research cracking cement sill has weight
Big meaning.Durable Journal of Sex Research in relation to cracking cement sill mainly includes two steps, and the first step is prefabricated crack, and second step is mould
Quasi- nature environment exposure condition is tested.And the crack form of high ductility cement-base composite material has its uniqueness.
High ductility cement-base composite material refers to one kind with cement, mineral admixture, aggregate, fiber and additive etc. for original
Material, in axle center, pulling force effect limit inferior elongation percentage is not less than 0.5% and cement base of the average crack width no more than 200 μm is multiple
Condensation material.High ductility cement-base composite material has excellent Crack Control ability, compared to the cracking forms of normal concrete,
High ductility cement-base composite material has the characteristics that multiple crack growth, and crack quantity is more, and fracture width is small, and (average crack width exists
Between 40 microns to 200 microns), fracture interval is small (average crack spacing is between 2 millimeters to 10 millimeters).
Crack method for prefabricating mainly includes wedging split the law, 3 points/4 points curved pulling methods, patterning methods, these cracks at present
Method for prefabricating is not particularly suited for high ductility cement-base composite material.Utilize the mechanics such as wedging split the law, 3 points/4 points of curved pulling methods
The crack randomness that the method for destruction introduces is big, and fracture width, depth, spacing and quantity are difficult to control；Patterning method is prefabricated
Crack low precision, and be difficult to the crack of prefabricated micron level.Other prefabricated crack methods that existing patent proposes also respectively have not
Foot, such as patent (Chinese Patent Application No.: 201621086437.2) and patent (Chinese Patent Application No.: 201720818946.8)
Be only capable of prefabricated single crack, cannot flexible control critical eigenvalue depth be limited to and when micron level crack prefabricated using the method
The problem of steel disc insufficient rigidity, can not be successfully molding；Such as patent (Chinese Patent Application No.: 201710160804.1) using insertion
The prefabricated crack of the method for steel disc is difficult to control fracture interval, and the width in its prefabricated crack when many cracks prefabricated using this method
Degree is similarly limited to steel disc rigidity, can not prefabricated as low as 40 microns of crack；As patent (Chinese Patent Application No.:
201510076538.5) prefabricated crack is through crack, does not meet the cracking forms of high ductility cement-base composite material；As specially
Benefit (Chinese Patent Application No.: 201710428076.8) using the method for the preset sphenoid with oil pressure storehouse in the big ruler of prefabricated single
It is effective when very little crack, but at prefabricated micron level crack, oil can not be set on the sphenoid of some tens of pm
The problem of pressing storehouse, and equally existing steel disc insufficient rigidity；For another example patent: for pre-cast concrete base test specimen crack prefabricated test specimen and
(Chinese Patent Application No.: the test specimen 201720955679.9) used is cylinder to prefabrication system, and it is multiple to work as high ductility cement base
When condensation material is using this method prefabricated crack, a plurality of uncontrollable crack developed at random is often generated in pressurized process.
Summary of the invention
Goal of the invention: present invention aims to overcome that above-mentioned existing method there are the problem of, providing one kind can flexibly adjust
Control fracture width, the controllability of depth and spacing be strong, strong operability meets high ductility cement-base composite material cracking feature
The device of multiple crack growth.
Technical solution: the present invention includes sample preparation mold, and the interposition of the sample preparation mold left side plate installs
Fluted, upper surface is equipped with blade holder, and the left and right sides of the blade holder bottom is equipped with concave shape supporting plate, and inside is set
There are several prefabricated crack blades and fracture interval to control partition, the prefabricated crack blade and fracture interval control partition can
Match with concave shape supporting plate and groove.
The depth of groove is equal with the recessed depth of concave shape supporting plate and the fracture interval control width of partition bottom.
The thickness of the sample preparation mold left side plate and the maximum width of concave shape supporting plate and fracture interval control every
The width on plate top is equal.
The height of fracture interval control partition be equal to sample preparation mold depth and blade holder height it
With.
The fracture interval control partition uses two specifications of 2mm and 1mm.
The prefabricated crack insert bottom width and sample preparation mold or so the vertical range of groove are equal, top
Width is equal with the inner width of blade holder.
The thickness of the prefabricated crack blade is between 40 μm -200 μm, and bottom level is between 5mm -30mm.
The prefabricated crack blade and fracture interval control baffle interval are distributed, and are set between the prefabricated crack blade of every two
There are several fracture interval control partitions.
The front and rear sides of the blade holder are equipped with fixed transposition, the height of the fixed device and blade holder
It is highly equal.
The fixation device is formed by stainless steel plate and bolt welding, can be with the installation of blade holder front and rear sides
Hole connection, the end face of the bolt and prefabricated crack blade contact.
The utility model has the advantages that the present invention can be by selecting the prefabricated crack blade of appropriate size (to specifically include blade thickness, height
Degree) and the crack interval control partition of suitable thickness simulate the cracks of different parameters, prefabricated fracture width minimum is up to 40 μ
M, spacing-controllable system are so as to effectively simulate the multiple crack growth behavior of high ductility cement-base composite material in millimeter rank
Crack high ductility cement-base composite material cement-based material durable Journal of Sex Research provide technical support.
Detailed description of the invention
Fig. 1 is three dimensional structure diagram of the invention；
Fig. 2 is sample preparation mold schematic diagram of the invention；
Fig. 3 is results of fracture simulation partial schematic diagram of the invention；
Fig. 4 is blade holder schematic diagram of the invention；
Fig. 5 is fixing device schematic diagram of the invention；
Fig. 6 is prefabricated crack blade schematic diagram of the invention；
Fig. 7 is that fracture interval of the invention controls partition schematic diagram；
Fig. 8 is the crack of different in width produced by the present invention.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings.
As shown in Figures 1 to 7, the present invention includes sample preparation mold 1, groove 2, blade holder 3, prefabricated crack blade
4, fracture interval controls partition 5, fixed device 6, mounting hole 7, nut 8 and concave shape supporting plate 9.1 left and right sides of sample preparation mold
The middle position of plate is equipped with symmetrical groove 2, and upper surface is equipped with blade holder 3, the left and right two of 3 bottom of blade holder
Side is equipped with symmetrical concave shape supporting plate 9, and inside is equipped with several prefabricated crack blades 4 and controls partition 5 with fracture interval, prefabricated
Crack blade 4 and fracture interval control partition 5 can match with concave shape supporting plate 9 and groove 2, form splicing.
2 depth of groove is equal with the recessed depth of concave shape supporting plate 9 and the fracture interval control width of 5 bottom of partition.Sample
Prepare the width phase of the thickness of 1 left side plate of mold and maximum width and fracture interval control 5 top of partition of concave shape supporting plate 9
Deng.The height that fracture interval controls partition 5 is equal to the depth of sample preparation mold 1 and the sum of the height of blade holder 3.Crack
Spacing controls partition 5 and uses two specifications of 2mm and 1mm.Prefabricated 4 bottom width of crack blade and sample preparation mold 1 or so are recessed
Vertical range at slot is equal, and upper width is equal with the inner width of blade holder 3.The thickness of prefabricated crack blade 4 is in 40 μ
Between 200 μm of m -, bottom level is between 5mm -30mm.Prefabricated crack blade 4 and fracture interval control partition 5 interval point
Cloth is equipped with several fracture intervals between the prefabricated crack blade 4 of every two and controls partition 5, to adjust fracture width and interval.Knife
The front and rear sides of piece fixed frame 3 are equipped with fixed transposition 6, and the height of fixed device 6 is equal with the height of blade holder 3.It is fixed
Device 6 is formed by stainless steel plate and bolt welding, can be connect with the mounting hole 7 of 3 front and rear sides of blade holder, and pass through spiral shell
Mother 8 is fixed in blade holder 3, and the end face of front and rear sides bolt is contacted with prefabricated crack blade 4.
Detailed process of the invention are as follows:
1) fracture parameters choose: according to research it needs to be determined that fracture width (50 μm, 80 μm, 200 μm), depth (5mm,
10mm, 30mm) and crack number (9), select the prefabricated crack blade and the control of appropriate number of crack interval of 9 kinds of specifications
Partition；
2) crack interval of the prefabricated crack blade of different size and different size, quantity assembly combination: is controlled into partition
According to the parameter combination determined in step 1, it is assemblied in blade holder by fixed device and nut, in sample preparation mold
Release agent is smeared in internal and blade two sides, the protrusion that prefabricated crack blade and fracture interval control partition are formed and concave shape support
Plate and groove complement each other to form assembly；
3) it pouring molding: stirs, charges into mold, and shaking according to cement-based material match ratio weighing needed for research
Vibration compacting on dynamic platform pays attention to guaranteeing that prefabricated crack device does not shift with sample preparation mold in the process, conserve
Blade and demoulding are pulled up after 24 hours, obtain the sample with different in width crack, as shown in Figure 8；
4) it exposure experiment: is needed to conserve on sample according to research to fixed age, simulating natural environment designs exposure condition
Carry out follow-up test research.
Claims (10)
1. a kind of device for simulating high ductility cement-base composite material multiple crack growth, which is characterized in that including sample preparation mold
(1), the middle position of sample preparation mold (1) left side plate is equipped with groove (2), and upper surface is equipped with blade holder (3),
The left and right sides of blade holder (3) bottom is equipped with concave shape supporting plate (9), and inside is equipped with several prefabricated crack blades (4)
Partition (5) are controlled with fracture interval, the prefabricated crack blade (4) and fracture interval control partition (5) can be with concave shapes
Supporting plate (9) and groove (2) match.
2. a kind of device for simulating high ductility cement-base composite material multiple crack growth according to claim 1, feature exist
In the width phase of the groove (2) depth and the recessed depth of concave shape supporting plate (9) and fracture interval control partition (5) bottom
Deng.
3. a kind of device for simulating high ductility cement-base composite material multiple crack growth according to claim 1, feature exist
In, the thickness of sample preparation mold (1) left side plate and the maximum width of concave shape supporting plate (9) and fracture interval control every
The width on plate (5) top is equal.
4. a kind of device for simulating high ductility cement-base composite material multiple crack growth according to claim 1, feature exist
In the height of fracture interval control partition (5) is equal to the depth of sample preparation mold (1) and the height of blade holder (3)
The sum of degree.
5. a kind of device for simulating high ductility cement-base composite material multiple crack growth according to claim 1 or 4, feature
It is, fracture interval control partition (5) uses two specifications of 2mm and 1mm.
6. a kind of device for simulating high ductility cement-base composite material multiple crack growth according to claim 1, feature exist
In, prefabricated crack blade (4) bottom width is equal with the vertical range of sample preparation mold (1) left and right groove, on
Portion's width is equal with the inner width of blade holder (3).
7. a kind of device for simulating high ductility cement-base composite material multiple crack growth according to claim 1 or 6, feature
It is, the thickness of the prefabricated crack blade (4) is between 40 μm -200 μm, and bottom level is between 5mm -30mm.
8. a kind of device for simulating high ductility cement-base composite material multiple crack growth according to claim 1, feature exist
Be spaced apart in, the prefabricated crack blade (4) and fracture interval control partition (5), the prefabricated crack blade (4) of every two it
Between be equipped with several fracture intervals control partition (5).
9. a kind of device for simulating high ductility cement-base composite material multiple crack growth according to claim 1, feature exist
In the front and rear sides of the blade holder (3) are equipped with fixed transposition (6), and the height of the fixed device (6) is fixed with blade
The height of frame (3) is equal.
10. a kind of device for simulating high ductility cement-base composite material multiple crack growth according to claim 9, feature exist
In the fixation device (6) is formed by stainless steel plate and bolt welding, can be with the peace of blade holder (3) front and rear sides
Hole (7) connection is filled, the end face of the bolt is contacted with prefabricated crack blade (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810538603.5A CN109001012B (en) | 2018-05-30 | 2018-05-30 | Device for simulating multi-joint cracking of high-ductility cement-based composite material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810538603.5A CN109001012B (en) | 2018-05-30 | 2018-05-30 | Device for simulating multi-joint cracking of high-ductility cement-based composite material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109001012A true CN109001012A (en) | 2018-12-14 |
| CN109001012B CN109001012B (en) | 2021-01-26 |
Family
ID=64573322
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810538603.5A Active CN109001012B (en) | 2018-05-30 | 2018-05-30 | Device for simulating multi-joint cracking of high-ductility cement-based composite material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109001012B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111283935A (en) * | 2020-03-09 | 2020-06-16 | 东北石油大学 | High-efficient artificial rock core epoxy pours device |
| CN112179832A (en) * | 2019-07-05 | 2021-01-05 | 中国石油天然气股份有限公司 | Indoor simulation experiment device and method for dynamic erosion corrosion of carbon dioxide to cement |
| CN114486448A (en) * | 2022-02-17 | 2022-05-13 | 南京工程学院 | Method for manufacturing multi-angle V or U-shaped cracks of stretched soil sample |
| CN116499803A (en) * | 2023-06-29 | 2023-07-28 | 云南省生态环境科学研究院 | Mining area waste rock river sediment sampling method and sampling device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102603234A (en) * | 2012-03-14 | 2012-07-25 | 东南大学 | Method for pre-mixing high-ductility cement-based composite material |
| CN104655466A (en) * | 2015-02-13 | 2015-05-27 | 成都理工大学 | Die for manufacturing brittle material cuboid model with cracks |
| CN104827550A (en) * | 2015-05-13 | 2015-08-12 | 中南大学 | Precracking rebar concrete sample molding die and sample molding method |
| CN206057056U (en) * | 2016-09-27 | 2017-03-29 | 安徽理工大学 | A kind of instrument for making the prefabricated crack of concrete test block |
| CN106979882A (en) * | 2017-05-27 | 2017-07-25 | 安徽理工大学 | A kind of device and method for being used to make concrete by three-point bending coped beam |
-
2018
- 2018-05-30 CN CN201810538603.5A patent/CN109001012B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102603234A (en) * | 2012-03-14 | 2012-07-25 | 东南大学 | Method for pre-mixing high-ductility cement-based composite material |
| CN104655466A (en) * | 2015-02-13 | 2015-05-27 | 成都理工大学 | Die for manufacturing brittle material cuboid model with cracks |
| CN104827550A (en) * | 2015-05-13 | 2015-08-12 | 中南大学 | Precracking rebar concrete sample molding die and sample molding method |
| CN206057056U (en) * | 2016-09-27 | 2017-03-29 | 安徽理工大学 | A kind of instrument for making the prefabricated crack of concrete test block |
| CN106979882A (en) * | 2017-05-27 | 2017-07-25 | 安徽理工大学 | A kind of device and method for being used to make concrete by three-point bending coped beam |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112179832A (en) * | 2019-07-05 | 2021-01-05 | 中国石油天然气股份有限公司 | Indoor simulation experiment device and method for dynamic erosion corrosion of carbon dioxide to cement |
| CN111283935A (en) * | 2020-03-09 | 2020-06-16 | 东北石油大学 | High-efficient artificial rock core epoxy pours device |
| CN111283935B (en) * | 2020-03-09 | 2021-12-21 | 东北石油大学 | High-efficient artificial rock core epoxy pours device |
| CN114486448A (en) * | 2022-02-17 | 2022-05-13 | 南京工程学院 | Method for manufacturing multi-angle V or U-shaped cracks of stretched soil sample |
| CN114486448B (en) * | 2022-02-17 | 2024-04-12 | 南京工程学院 | Manufacturing method of stretching soil sample multi-angle V or U-shaped crack |
| CN116499803A (en) * | 2023-06-29 | 2023-07-28 | 云南省生态环境科学研究院 | Mining area waste rock river sediment sampling method and sampling device |
| CN116499803B (en) * | 2023-06-29 | 2023-08-25 | 云南省生态环境科学研究院 | Mining area waste rock river sediment sampling method and sampling device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109001012B (en) | 2021-01-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109001012A (en) | A kind of device for simulating high ductility cement-base composite material multiple crack growth | |
| CN105973802B (en) | Anchor pole slurry country rock bond strength testing method | |
| CN105973662B (en) | Beam type test piece pouring mold and mechanical property testing method of beam type test piece | |
| Ahn et al. | Shear behaviour of perfobond rib shear connector under static and cyclic loadings | |
| CN101413304B (en) | Cast-in-place concrete hollow outer wall and construction method thereof | |
| CN108982224A (en) | A kind of experimental rig and method of test pile and slip casting soil body contact surface failure mechanism | |
| CN102776900A (en) | Anchor system working mechanism two-dimensional test method | |
| CN109765017B (en) | Method for testing transverse shear resistance of small hinge joint hollow slab bridge combined reinforcing member | |
| US6506819B1 (en) | Light weight particulate composite materials with cenospheres as reinforcements and method for making the same | |
| Murtiadi et al. | Behaviour of high-strength concrete plates under impact loading | |
| Siddh et al. | Experimental studies on behaviour of composite slab with profiled steel sheeting | |
| Winkler et al. | Punching shear tests on symmetrically reduced slab quarters | |
| CN106223545A (en) | Utilize beam bottom steel bar structure of reinforcing bar protection layer thickness of steel bar support skeleton control | |
| Fernando et al. | The experimental investigation of failure mechanism and bearing capacity of different types of shallow foundations | |
| CN107895094A (en) | Design method for orthotropic steel reinforced concrete combined bridge deck interface shearing-resistance | |
| CN205662833U (en) | Hybrid fiber replaces empty core plate roof beam of self -compaction precast concrete of reinforcing bar | |
| Abrishambaf | Creep behaviour of cracked steel fibre reinforced self-compacting concrete laminar structures | |
| Al-Shuwaili et al. | Experimental characterisation of Perfobond shear connectors through a new one-sided push-out test | |
| Saito et al. | Loading capacities and failure modes of various reinforced-concrete slabs subjected to high speed loading | |
| De Villiers | Bond behaviour of deformed steel reinforcement in lightweight foamed concrete | |
| Salman | Strength and behavior of composite steel tube concrete beam | |
| Nam et al. | Perforated FRP shear connector for the FRP-concrete composite bridge deck | |
| Rahmadi et al. | Prediction of deflection of the composite profiled steel sheet MDF-board (PSSMDFB) floor system | |
| CN204346818U (en) | Adjustable pseudo-static test charger | |
| CN102992210A (en) | Assembly-available tower crane platform base attached to wall body |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |