CN113654980A - A test device for early crack resistance of concrete - Google Patents
A test device for early crack resistance of concrete Download PDFInfo
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- CN113654980A CN113654980A CN202111047398.0A CN202111047398A CN113654980A CN 113654980 A CN113654980 A CN 113654980A CN 202111047398 A CN202111047398 A CN 202111047398A CN 113654980 A CN113654980 A CN 113654980A
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- 238000012360 testing method Methods 0.000 title claims abstract description 31
- 238000007790 scraping Methods 0.000 claims abstract description 28
- 238000007664 blowing Methods 0.000 claims abstract description 12
- 230000007246 mechanism Effects 0.000 claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 230000001939 inductive effect Effects 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims 2
- 238000005336 cracking Methods 0.000 abstract description 6
- 238000011056 performance test Methods 0.000 abstract description 3
- 239000011324 bead Substances 0.000 abstract 1
- 230000035882 stress Effects 0.000 description 9
- 230000009471 action Effects 0.000 description 7
- 230000000149 penetrating effect Effects 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 239000000428 dust Substances 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000006355 external stress Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
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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
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
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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
- G01N1/36—Embedding or analogous mounting of samples
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- Health & Medical Sciences (AREA)
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Abstract
The invention provides a concrete early anti-cracking performance test device, which comprises a bottom plate; the front end and the rear end of the bottom plate are respectively fixedly connected with a bracket with an L-shaped structure, the left end and the right end of the bottom plate are respectively fixedly connected with a fixed baffle, and the surface direct blowing mechanism of the test piece is connected to a group of fixed baffles; the surface vibrator is arranged on the upper support frame. Utilize electric block to drive upper junction plate and the downward motion of the board that vibrates, make the board that vibrates arrange the concrete in on the surface in, vibrate the concrete through vibrating motor drive vibrating plate activity, through driving motor, drive the scraping plate and move to the other end, strike off the surface of concrete, through two sets of fans, and utilize out the tuber pipe and send wind to concrete surface department, parallel vertical blowing concrete surface, through pulling down the deep bead, and wear the pole to take out, thereby take movable baffle off, so that can discharge out the concrete in the mould.
Description
Technical Field
The invention belongs to the technical field of concrete tests, and particularly relates to a concrete early-stage crack resistance test device.
Background
Concrete crack resistance refers to the ability of concrete to resist cracking. The crack resistance of concrete is a comprehensive performance, has a certain relation with tensile strength, ultimate tensile deformation capacity, tensile elastic modulus, autogenous volume deformation, creep and thermal performance, and is usually detected by a concrete crack resistance testing device.
If the application number is: CN201810963192.4 discloses a concrete early anti-cracking performance test device, which structurally comprises an adjusting controller top plate, a hydraulic telescopic cylinder, an anti-cracking stress rod, a support column, a fixed support seat, a compression dust removal multi-aspect test device and an operation table, wherein the hydraulic telescopic cylinder is arranged below the adjusting controller top plate and connected in a nesting mode. The device can test and detect the crack resistance of the concrete in multiple aspects, not only can perform basic detection on the crack resistance of the concrete through external stress, but also can further perform test on the crack resistance of the concrete through temperature stress generated by changing temperature, so that the crack resistance of the concrete is improved, the integrity, the durability, even the safety and the stability of a building are enhanced, and the device can collect and compress dust generated in the test process, prevent the dust from scattering around to enter equipment gaps and increase the abrasion of equipment.
Based on the above, when testing the anti-crack performance of concrete, need the manual work to carry out the tamping vibration to the concrete in the mould to after tamping manually strickle off the surface of concrete, still need blow through the surface of equipment to the concrete, whole operation is more troublesome moreover.
Disclosure of Invention
In order to solve the technical problems, the invention provides a concrete early-stage crack resistance testing device, which aims to solve the problems that the concrete in a mould needs to be manually tamped, the surface of the concrete needs to be manually scraped after tamping, the surface of the concrete needs to be blown by equipment, and the whole operation is troublesome.
The invention relates to a concrete early crack resistance test device, which is realized by the following specific technical means:
a concrete early crack resistance test device comprises a bottom plate;
the front end and the rear end of the bottom plate are respectively fixedly connected with a bracket with an L-shaped structure, the left end and the right end of the bottom plate are respectively fixedly connected with a fixed baffle plate, and the fixed baffle plate is provided with a pin hole;
the device comprises an upper support frame, wherein one end of the bottom of the upper support frame is provided with a strip-shaped lower connecting plate, the lower connecting plate is fixedly connected to a group of fixed baffles, the other end of the bottom of the upper support frame is respectively provided with two groups of lower connecting blocks, the two groups of lower connecting blocks are respectively and fixedly connected to the other group of fixed baffles, the four bottom ends of the inner side of the upper support frame are respectively connected with an L-shaped limiting plate, and a guide column is connected between the L-shaped limiting plate and the top of the upper support frame;
the bottom end of the stress induction generator is welded and fixed with the bottom plate, the upper end of the stress induction generator is 10cm lower than the top end of the fixed baffle, and the stress induction generator is formed by welding angle steel and a steel plate;
the test piece surface direct blowing mechanism is connected to the group of fixed baffles;
the surface vibrator is arranged on the upper support frame.
Furthermore, the front end and the rear end of the bottom plate are respectively and movably provided with eight groups of movable baffles, the eight groups of movable baffles are arranged on the bracket and positioned between the two groups of fixed baffles, and the eight groups of movable baffles and the fixed baffles are fixed through penetrating rods.
Furthermore, bayonets are respectively arranged on the lower connecting plate and the two groups of lower connecting blocks, two ends of the wind shield are respectively clamped into the bayonets and attached to the movable baffle, and the height of the wind shield is the same as that of the lower connecting plate.
Further, the test piece surface direct blowing mechanism comprises:
the air collecting box is of a square structure, the bottom and two sides of the air collecting box are of closed structures, and two groups of square mounting openings are formed in the outer end of the air collecting box;
two groups of fans are arranged and are embedded in the square mounting port in a sealing manner;
and the air outlet pipes are provided with twelve groups, the bottom ends of the air outlet pipes are inserted into the air collecting box, and the upper ends of the air outlet pipes are obliquely inserted into the lower connecting plate.
Further, the surface vibrator includes:
the electric hoist is fixedly arranged in the middle of the top end of the upper support frame through a bolt;
the four ends of the upper connecting plate are respectively and slidably arranged on the guide columns, and the upper connecting plate is also hung on the hook of the electric hoist through two groups of hanging rings;
eight groups of vibrating plates are arranged and are connected with the lower side of the upper connecting plate through two groups of movable connecting rods;
one end of the movable connecting rod is rotatably connected with the upper connecting plate, and the other end of the movable connecting rod is rotatably connected with the vibrating plate;
the vibrating motor is fixedly arranged in the middle of the vibrating plate.
Furthermore, the outer end angles of the two outer groups of the vibrating plates are respectively provided with a notch, the size of the notch is matched with that of the L-shaped limiting plate, and when the four end angles of the upper connecting plate are arranged on the L-shaped limiting plate, the two outer groups of the vibrating plates downwards pass through the L-shaped limiting plate.
Further, rotate respectively between the lower extreme of upper bracket and install two sets of screw rods, and still install on two sets of screw rods and scrape the flat board, the upside both ends angle department of scraping the flat board is equipped with the internal thread hole respectively, and scrapes the flat board and pass through internal thread hole and screw rod threaded connection, the outer end of screw rod is connected through the V belt transmission, and wherein a set of screw rod still with be connected through the V belt transmission between driving motor's the motor shaft, driving motor installs on the triangle-shaped support on a set of fixed stop, and scrape the flat board, the flat portion is scraped with the driving motor constitution jointly to the screw rod.
Furthermore, the lower end of the scraping plate is of a wedge-shaped structure and is flush with the upper end of the fixed baffle, and the thickness of the scraping plate is the same as that of the lower connecting plate and is 1/2 the thickness of the fixed baffle.
The invention at least comprises the following beneficial effects:
1. the invention is provided with the surface vibrator, after concrete is poured into a mould which is composed of the bottom plate, the fixed baffle and the movable baffle, the upper connecting plate and the vibrating plate are driven by the electric hoist to move downwards, the upper connecting plate is arranged on the L-shaped limiting plate, the vibrating plate is arranged on the surface of the concrete, and the vibrating plate is driven by the vibrating motor to vibrate the concrete.
2. According to the invention, the scraping part is arranged, after vibration is finished, the upper connecting plate and the vibrating plate are driven to return upwards through the electric hoist, the driving motor is started to drive the two groups of screw rods to rotate, and the scraping plate is driven to move towards the other end under the threaded connection of the screw rods and the inner threaded holes in the scraping plate, so that the surface of concrete is scraped, and meanwhile, the scraping plate is attached to the air outlet of the air outlet pipe, so that the concrete is prevented from flowing into the air outlet pipe and blocking the air outlet pipe.
3. According to the invention, the test piece surface direct blowing mechanism is arranged, after concrete is formed for 30 minutes, air is sent to the concrete surface by the two groups of fans and the air outlet pipe, and the test piece surface direct blowing mechanism is parallel to the concrete surface under the action of the wind shield, so that the anti-cracking performance of the concrete can be tested.
3. According to the invention, through the movable baffle, after the measurement is finished, the wind shield is detached and the penetrating rod is pulled out, so that the movable baffle is detached, and the concrete in the mold can be discharged.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is an enlarged schematic view of the invention at a in fig. 1.
Fig. 3 is a schematic view of the structure of fig. 1 from another view angle according to the present invention.
Fig. 4 is a schematic view illustrating the structure of the invention in which the upper connecting plate moves downward to the L-shaped stopper plate in fig. 1.
Fig. 5 is an enlarged view of the structure of fig. 4 at B according to the present invention.
FIG. 6 is a schematic illustration of the invention shown in FIG. 1 with the flapper and the windshield removed.
Fig. 7 is a schematic structural view of the two-sided flapper and the windshield of fig. 6 with the flapper in motion and the screed plate in accordance with the present invention.
Fig. 8 is a schematic view of the connection structure of the upper connecting plate and the vibrating plate according to the present invention.
In the drawings, the corresponding relationship between the component names and the reference numbers is as follows:
1. a base plate; 101. a bracket; 103. fixing a baffle plate; 1021. a pin hole; 1022. a triangular bracket; 103. an upper support frame; 1031. a lower connecting plate; 1032. a lower connecting block; 1033. an L-shaped limiting plate; 1034. a guide post; 1035. a bayonet; 104. a movable baffle; 105. penetrating a rod; 106. a wind deflector;
2. a stress-inducing generator;
3. a test piece surface direct blowing mechanism; 301. an air collecting box; 3011. a square mounting port; 302. a fan; 303. an air outlet pipe;
4. a surface vibrator; 401. an electric hoist; 402. an upper connecting plate; 4021. a hoisting ring; 403. a vibrating plate; 404. a movable connecting rod; 405. a vibration motor;
5. a scraping part; 501. scraping the plate; 502. a screw; 503. the motor is driven.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "coaxial," "bottom," "one end," "top," "middle," "other end," "upper," "side," "top," "inner," "front," "center," "two ends," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing and simplifying the description, and are not intended to 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 construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be understood broadly, and for example, they may be fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.
Example (b):
as shown in figures 1 to 8:
the invention provides a concrete early anti-cracking performance test device, which comprises a bottom plate 1;
the front end and the rear end of the bottom plate 1 are respectively fixedly connected with a bracket 101 with an L-shaped structure, the left end and the right end of the bottom plate 1 are respectively fixedly connected with a fixed baffle plate 102, and the fixed baffle plate 102 is provided with a pin hole 1021;
an upper support frame 103, wherein one end of the bottom of the upper support frame 103 is provided with a strip-shaped lower connecting plate 1031, the lower connecting plate 1031 is fixedly connected to one group of fixed baffles 102, the other end of the bottom of the upper support frame 103 is respectively provided with two groups of lower connecting blocks 1032, the two groups of lower connecting blocks 1032 are respectively fixedly connected to the other group of fixed baffles 102, the four bottom ends of the inner side of the upper support frame 103 are respectively connected with an L-shaped limiting plate 1033, and a guide post 1034 is connected between the L-shaped limiting plate 1033 and the top of the upper support frame 103;
referring to fig. 7, the bottom end of the stress inducing generator 2 is welded and fixed to the bottom plate 1, the upper end of the stress inducing generator 2 is 10cm lower than the top end of the fixed baffle 102, and the stress inducing generator 2 is formed by welding angle steel and a steel plate;
referring to fig. 3, the specimen surface direct blowing mechanism 3 is connected to a set of fixed baffles 102; the test piece surface direct blowing mechanism 3 includes: the air collecting box 301 is of a square structure, the bottom and two sides of the air collecting box 301 are of closed structures, and two groups of square mounting holes 3011 are formed in the outer ends of the air collecting box 301; two groups of fans 302 are arranged, and the fans 302 are hermetically embedded in the square mounting port 3011; the air outlet pipes 303 are provided with twelve groups, the bottom ends of the air outlet pipes 303 are inserted into the air collecting box 301, the upper ends of the air outlet pipes are obliquely inserted into the lower connecting plate 1031, after the concrete is formed for 30 minutes, the two groups of fans 302 are started, air is sent to the surface of the concrete through the air outlet pipes 303, and the air is blown to the surface of the concrete in parallel under the action of the wind shield 106;
referring to fig. 7 and 8, the surface vibrator 4 is mounted on the upper frame 103, and the surface vibrator 4 includes: the electric hoist 401 is fixedly arranged in the middle of the top end of the upper support frame 103 through bolts; the four ends of the upper connecting plate 402 are slidably mounted on the guide posts 1034 respectively, and the upper connecting plate 402 is also hung on the hook of the electric hoist 401 through the two lifting rings 4021; eight groups of vibrating plates 403 are arranged on the vibrating plates 403 and are connected to the lower side of the upper connecting plate 402 through two groups of movable connecting rods 404; one end of the movable connecting rod 404 is rotatably connected with the upper connecting plate 402, and the other end of the movable connecting rod 404 is rotatably connected with the vibrating plate 403; the vibrating motor 405 is fixedly arranged in the middle of the vibrating plate 403, the electric hoist 401 is started to drive the upper connecting plate 402 and the vibrating plate 403 to move downwards, firstly, the two groups of vibrating plates 403 on the outer side downwards pass through the L-shaped limiting plate 1033 under the action of gaps of the vibrating plates, then, the upper connecting plate 402 is placed on the L-shaped limiting plate 1033, meanwhile, the vibrating plates 403 are placed on the surface of concrete, the electric hoist 401 is closed, the vibrating motor is started, and the vibrating plates 403 are driven to vibrate the concrete under the action of the movable connecting rod 404; after the vibration is finished, the electric hoist 401 drives the upper connecting plate 402 and the vibrating plate 403 to return upwards.
Referring to fig. 1 and 6, eight groups of movable baffles 104 are movably mounted at the front end and the rear end of the bottom plate 1 respectively, the eight groups of movable baffles 104 are arranged on the bracket 101 and are positioned between the two groups of fixed baffles 102, the eight groups of movable baffles 104 and the fixed baffles 102 are fixed through the penetrating rods 105, and after the measurement is completed, the penetrating rods 105 are pulled out, so that the movable baffles 104 are taken down, and the concrete in the mold can be discharged.
Referring to fig. 5, the lower connecting plate 1031 and the two sets of lower connecting blocks 1032 are respectively provided with a bayonet 1035, two ends of the wind deflector 106 are respectively clamped into the bayonet 1035 and attached to the movable baffle 104, and the wind deflector 106 and the lower connecting plate 1031 have the same height.
Referring to fig. 8, two sets of outer end angles of the outer side of the vibrating plate 403 are respectively provided with a notch, the size of the notch is adapted to the size of the L-shaped limiting plate 1033, and when the four end angles of the upper connecting plate 402 are placed on the L-shaped limiting plate 1033, the two sets of vibrating plates 403 on the outer side pass through the L-shaped limiting plate 1033, and when the upper connecting plate 402 and the vibrating plates 403 move downward, the two sets of vibrating plates 403 on the outer side can pass through the L-shaped limiting plate 1033 and be placed on the surface of concrete, so as to vibrate the concrete.
Referring to fig. 5 and 7, two sets of screws 502 are respectively rotatably mounted between the lower ends of the upper support frame 103, and a scraping plate 501 is further mounted on the two sets of screws 502, two end corners of the upper side of the scraping plate 501 are respectively provided with an internal thread hole, and the scraping plate 501 is in threaded connection with the screws 502 through the internal thread hole, the outer ends of the screws 502 are in transmission connection through a triangular belt, and one set of screws 502 is also in transmission connection with the motor shaft of a driving motor 503 through the triangular belt, the driving motor 503 is mounted on a triangular bracket 1022 on a set of fixed baffle 102, and the scraping plate 501, the screws 502 and the driving motor 503 form a scraping portion 5, and by starting the driving motor 503, the two sets of screws 502 are driven to rotate, and under the threaded connection of the internal thread hole and the screws 502 on the scraping plate 501, the scraping plate 501 is driven to move towards the other end, so as to scrape the surface of the concrete.
In another embodiment, referring to fig. 7, the lower end of the scraping plate 501 is of a wedge-shaped structure and is flush with the upper end of the fixed baffle 102, the thickness of the scraping plate 501 is the same as that of the lower connecting plate 1031, and is 1/2 equal to that of the fixed baffle 102, when the scraping plate 501 scrapes the surface of the concrete, the smoothness of the scraping plate 501 during scraping is increased, and the scraping plate 501 can be attached to the lower connecting plate 1031, and the scraping plate 504 is attached to the air outlet of the air outlet pipe 303, so that the concrete is prevented from flowing into the air outlet pipe 303 and blocking the air outlet pipe 303.
The specific use mode and function of the embodiment are as follows:
in the invention, concrete is poured into a mould which is composed of a bottom plate 1, a fixed baffle plate 102 and a movable baffle plate 104, the surface of the concrete is slightly higher than the top end of the fixed baffle plate 102, an electric hoist 401 is started to drive an upper connecting plate 402 and vibrating plates 403 to move downwards, firstly, two groups of vibrating plates 403 on the outer side downwards pass through an L-shaped limiting plate 1033 under the action of gaps of the vibrating plates, then the upper connecting plate 402 is placed on the L-shaped limiting plate 1033, meanwhile, the vibrating plates 403 are placed on the surface of the concrete, the electric hoist 401 is closed, a vibrating motor is started, and the vibrating plates 403 are driven to vibrate the concrete under the action of a movable connecting rod 404; after vibrating, the electric hoist 401 drives the upper connecting plate 402 and the vibrating plate 403 to return upwards, the driving motor 503 is started to drive the two groups of screws 502 to rotate, and the scraping plate 501 is driven to move towards the other end under the threaded connection of the internal threaded hole on the scraping plate 501 and the screws 502, so that the surface of the concrete is scraped; after the concrete is formed for 30 minutes, two groups of fans 302 are started, wind is sent to the surface of the concrete through a wind outlet pipe 303, and the wind is blown to the surface of the concrete in parallel and directly under the action of a wind shield 106;
measuring the crack from the time when the concrete is stirred and water is added to the concrete to 24 hours, wherein the length of the crack is based on the crack visible by naked eyes, measuring the length of the crack by using a straight steel ruler, taking the linear distance between two ends of the crack as the length of the crack, adding the lengths of the two cracks when two cracks exist on a knife edge, converting the lengths into one crack, measuring the width of the crack by using a reading microscope (the division value is 0.01mm) with the magnification of 40 times, and measuring the width of each crack; measuring to obtain crack data after concrete pouring for 24 hours, and calculating the average crack area, the number of cracks in unit area and the total crack area in unit area;
after the measurement is completed, wind deflector 106 is removed and rod 105 is withdrawn, removing flapper 104 so that the concrete in the mold can be discharged.
The invention is not described in detail, but is well known to those skilled in the art.
The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111047398.0A CN113654980A (en) | 2021-09-08 | 2021-09-08 | A test device for early crack resistance of concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111047398.0A CN113654980A (en) | 2021-09-08 | 2021-09-08 | A test device for early crack resistance of concrete |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113654980A true CN113654980A (en) | 2021-11-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111047398.0A Withdrawn CN113654980A (en) | 2021-09-08 | 2021-09-08 | A test device for early crack resistance of concrete |
Country Status (1)
| Country | Link |
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| CN (1) | CN113654980A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115541855A (en) * | 2022-10-19 | 2022-12-30 | 中国建筑第五工程局有限公司 | Positioning device for measuring concrete expansion and contraction deformation by non-contact method |
| CN116026688A (en) * | 2023-01-17 | 2023-04-28 | 太仓申昆混凝土有限公司 | A detection device for anti-crack performance in concrete production |
-
2021
- 2021-09-08 CN CN202111047398.0A patent/CN113654980A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115541855A (en) * | 2022-10-19 | 2022-12-30 | 中国建筑第五工程局有限公司 | Positioning device for measuring concrete expansion and contraction deformation by non-contact method |
| CN115541855B (en) * | 2022-10-19 | 2025-07-15 | 中国建筑第五工程局有限公司 | A positioning device for measuring the expansion and contraction deformation of concrete by non-contact method |
| CN116026688A (en) * | 2023-01-17 | 2023-04-28 | 太仓申昆混凝土有限公司 | A detection device for anti-crack performance in concrete production |
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Application publication date: 20211116 |