CN111765829A - Device for measuring shrinkage rate of mortar in multiple directions - Google Patents
Device for measuring shrinkage rate of mortar in multiple directions Download PDFInfo
- Publication number
- CN111765829A CN111765829A CN202010728002.8A CN202010728002A CN111765829A CN 111765829 A CN111765829 A CN 111765829A CN 202010728002 A CN202010728002 A CN 202010728002A CN 111765829 A CN111765829 A CN 111765829A
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- mortar
- rod
- measuring
- shrinkage rate
- multiple directions
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
- G01B5/06—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness for measuring thickness
- G01B5/061—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness for measuring thickness height gauges
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- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention relates to a device for measuring mortar shrinkage in multiple directions, which comprises a base, a plurality of dial gauges for measuring the mortar sample shrinkage, a fixing frame for mounting the dial gauges, a clamping piece for clamping a mortar sample and a multi-channel concentrator, wherein the fixing frame is mounted on the base, the clamping piece is mounted on the fixing frame, the dial gauges are respectively positioned at the top of the fixing frame in the vertical direction and at two sides of the fixing frame in the horizontal direction, each dial gauge comprises a data output port, and the dial gauges are connected with a computer through the data output ports via the multi-channel concentrator. The invention has the effect of acquiring more comprehensive shrinkage numerical values of the mortar samples for analysis.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to a device for measuring mortar shrinkage in multiple directions.
Background
Mortar is a bonding substance used in building construction, and drying shrinkage is a common deformation of mortar substances and is one of the most main causes of mortar cracking, so that the shrinkage of mortar is usually examined before the mortar is used.
At present, a method for testing shrinkage rate indexes in national standard GB/T25181-2010 premixed mortar, JGJ/T70-2009 basic performance test method of building mortar, is usually adopted, in the method, a vertical mortar shrinker is adopted for detection, namely, mortar is poured into a standard test mold and is coagulated into a mortar sample, the mortar sample is pre-cured for seven days, the mortar sample is detached from the test mold after seven days, and the corresponding shrinkage rate is obtained by measuring through the vertical mortar shrinker.
With respect to the related art among the above, the inventors consider that the following drawbacks exist: in practical application, due to the action of each material in the mortar and the action of the gravity of the mortar, the mortar is stressed unevenly in all directions, and the shrinkage factor values obtained by the related technologies are not comprehensive, so that the research and improvement on the mortar performance are influenced.
Disclosure of Invention
In order to improve the incomplete condition of the shrinkage factor numerical value of acquireing, this application provides a device of diversified measurement mortar shrinkage factor.
The application provides a device of diversified measurement mortar shrinkage rate adopts following technical scheme:
the utility model provides a device of diversified measurement mortar shrinkage, includes base, a plurality of amesdial that are used for measuring mortar sample shrinkage, is used for installing the mount of a plurality of amesdials, is used for centre gripping mortar sample's holder and multichannel concentrator, the mount is installed in the base, the holder is installed in the mount, and is a plurality of the amesdial is located the both sides on the vertical ascending top of mount and the horizontal direction respectively, the amesdial includes data output port, the amesdial passes through data output port and connects through multichannel concentrator and computer.
By adopting the technical scheme, the mortar sample is arranged on the clamping piece, the dial indicator is arranged on the fixing frame and is connected with the computer through the data output port by the multi-channel concentrator, so that shrinkage rate data of the mortar sample measured by the multiple dial indicators in the vertical direction and the two sides in the horizontal direction are simultaneously acquired, the shrinkage rate data of the mortar sample measured by the multiple dial indicators are simultaneously acquired, in practical application, due to the action of each material in the mortar and the action of the gravity of the mortar, the stress of the mortar in each direction is uneven, so that the shrinkage rate of the mortar in the vertical direction is different from that of the mortar in the horizontal direction, the vertical mortar shrinker usually only measures the shrinkage rate of the mortar sample in the vertical direction, and the acquired shrinkage rate value is incomplete, the method and the device improve the condition that the obtained shrinkage numerical value is incomplete, and play a guiding role in researching and improving the mortar performance.
The invention is further configured to: the fixing frame comprises a transversely arranged bottom rod, a transversely arranged top rod and two longitudinally arranged vertical rods, the bottom rod, the top rod and the two vertical rods are sequentially connected in a head-to-tail mode and spliced to form a rectangular frame, the dial indicators are respectively located on the top rod and the two vertical rods, and the bottom rod is installed on the base.
Through adopting above-mentioned technical scheme, install the amesdial according to the both sides on the mount horizontal direction and the ascending top of vertical side, trail shrinkage percentage data in the three directions of mortar sample simultaneously, it is simple effective, fully guarantee stability and accuracy nature in the amesdial measurement process.
The invention is further configured to: the amesdial includes the sleeve, the ejector pin is provided with a plurality of longitudinal holes that are used for holding the sleeve, the axis in longitudinal hole is located vertical direction, two all be provided with a plurality of horizontal holes that are used for holding the sleeve on the vertical pole separately, the axis in horizontal hole is located the horizontal direction, install the mounting that is used for locking amesdial in the mount on the mount.
Through adopting above-mentioned technical scheme, insert each vertical hole and horizontal downthehole respectively with the sleeve of a plurality of amesdials for the detection head of amesdial is contradicted with the mortar sample of installing in the holder, and the slide bar of amesdial contracts in the sleeve, makes and detects the head and have the space that moves along with the mortar sample shrink, locks the amesdial on the mount through the mounting afterwards, effectively guarantees stability and the accuracy nature among the amesdial measurement process.
The invention is further configured to: the mounting is including being used for a plurality of bolts of contradicting with the sleeve, every vertical hole all communicates and is provided with first screw hole, bolt threaded connection is in first screw hole, every horizontal hole all communicates and is provided with the second screw hole, bolt threaded connection is in the second screw hole.
Through adopting above-mentioned technical scheme, insert each vertical hole and horizontal hole back respectively with the sleeve of a plurality of amesdials, screw up each bolt for a plurality of bolts contradict with the sleeve of a plurality of amesdials respectively, thereby effectively lock the amesdial in the mount, the demountable installation of amesdial has been realized in setting up of a plurality of bolts, the amesdial of being convenient for is used for different measurement places.
The invention is further configured to: the holder includes first supporting rod, second supporting rod and installs in the fixed axle of sill bar, the length direction of the length direction perpendicular to sill bar of fixed axle, the both ends of fixed axle length direction protrusion respectively in the both sides of sill bar, first supporting rod, second supporting rod are installed respectively in the both ends of fixed axle protrusion in the sill bar, the fixed axle is located and the fixed axle is rotated with the fixed axle to the second supporting rod cover and is connected, the fixed axle is located the base top.
Through adopting above-mentioned technical scheme, rotate the second supporting rod to the one side of keeping away from mount central point and putting to make second supporting rod and sill bar parallel, place the mortar sample in the clearance between first supporting rod and second supporting rod, reset the second supporting rod again, can be with the mortar sample centre gripping in the mount, thereby be convenient for the amesdial detects the shrinkage factor of mortar sample, thereby collect shrinkage factor numerical value in the computer, easy operation.
The invention is further configured to: the fixed shaft is fixedly connected to the bottom rod or is in threaded connection with the bottom rod.
Through adopting above-mentioned technical scheme, the fixed axle is the bolt, and fixed axle threaded connection then through the nut on the control fixed axle in the sill bar, control holder that can be convenient dismantles, installation and maintenance, and fixed axle fixed connection then need not to screw up the nut when measuring the contraction value of different mortar samples at every turn in the sill bar, reduces operation steps.
The invention is further configured to: the clamping pieces are two groups, and the two groups of clamping pieces are arranged on the bottom rod at intervals.
Through adopting above-mentioned technical scheme, rotate two second supporting rods respectively to the both sides of keeping away from mount central point and putting to make two second supporting rods and sill bar parallel, place the mortar sample in the clearance between first supporting rod and second supporting rod, reset two second supporting rods again, two sets of holders can lock the mortar sample on the mount more firmly.
The invention is further configured to: the first clamping rod is fixedly connected to the fixed shaft or sleeved on the fixed shaft and rotatably connected with the fixed shaft.
Through adopting above-mentioned technical scheme, first supporting rod plays the effect that preliminary balanced mortar sample erects on the sill bar of mount, with first supporting rod fixed connection in fixed axle, then only need operate the installation and the dismantlement of second supporting rod can accomplish the mortar sample, locate the fixed axle with first supporting rod cover and rotate with the fixed axle and be connected, then be the installation, the dismantlement and the maintenance of the holder of being convenient for.
The invention is further configured to: the first clamping rod and the plurality of bolts are positioned on the same side of the fixing frame.
Through adopting above-mentioned technical scheme for the direction that the mount center can be kept away from in the past to both sides rotation to two second supporting poles, and make the length direction after the second supporting pole rotates can be on a parallel with the length direction of bottom rod, thereby be convenient for the mortar sample from the mount second supporting pole place one side put into the clearance between first supporting pole and the second supporting pole, and need not to be disturbed the rotation of two second supporting poles by the bolt.
The invention is further configured to: the base includes first fixed block and second fixed block, first fixed block and second fixed block up end have all seted up the sliding tray that supplies sill bar sliding fit separately, the both ends of sill bar respectively with two sliding tray sliding fit, first fixed block and second fixed block interval set up.
Through adopting above-mentioned technical scheme, the setting of sliding tray is convenient for the installation and the dismantlement of base, avoids the device occupation space when not using of diversified measurement mortar shrinkage factor, and the setting up of first fixed block and second fixed block makes the support mount that the base can be more stable.
In summary, the present application includes at least one of the following beneficial technical effects:
1. by arranging the dial indicators at the top of the fixing frame in the vertical direction and at the two sides of the fixing frame in the horizontal direction and arranging the multi-channel concentrator, shrinkage rate data of mortar samples measured by the dial indicators are acquired simultaneously, the condition that the obtained shrinkage rate values are incomplete is improved, and a guiding effect on the research and improvement of the mortar performance is achieved;
2. the device for measuring the shrinkage rate of the mortar in multiple directions is detachably mounted, so that the assembly flexibility of the device is improved;
3. through setting up the holder that can operate in a flexible way for the installation easy operation of mortar sample, convenient and fast.
Drawings
Fig. 1 is a schematic structural diagram of a hidden part of a dial indicator in an embodiment of the present application.
Fig. 2 is a schematic view of another view angle structure of the hidden part of the dial indicator in the embodiment of the present application.
Description of reference numerals: 1. a base; 11. a first fixed block; 12. a second fixed block; 13. a sliding groove; 2. a dial indicator; 21. a sleeve; 22. a slide bar; 23. a detection head; 24. a data output port; 3. a fixed mount; 31. a bottom bar; 32. a top rod; 33. a vertical rod; 34. a longitudinal bore; 35. a transverse bore; 36. a first threaded hole; 37. a second threaded hole; 4. a clamping member; 41. a first clamping rod; 42. a second clamping rod; 43. a fixed shaft; 5. and (4) bolts.
Detailed Description
The present application is described in further detail below with reference to the attached drawings.
The embodiment of the application discloses device of diversified measurement mortar shrinkage factor, refer to fig. 1, including base 1, a plurality of amesdial 2 that are used for measuring mortar sample shrinkage factor, the mount 3 that is used for installing a plurality of amesdials 2, the holder 4 that is used for centre gripping mortar sample. The fixing frame 3 is arranged on the base 1, and the clamping piece 4 is arranged on the fixing frame 3.
The dial indicator 2 comprises a sleeve 21, a sliding rod 22 connected in the sleeve 21 in a sliding manner, a detection head 23 arranged on the sliding rod 22 and a data output port 24, wherein the detection head 23 is positioned at one end of the sliding rod 22 far away from the sleeve 21, and the dial indicator 2 can be obtained through a commercially available channel, which is not described herein.
The fixing frame 3 comprises a bottom rod 31 arranged transversely, a top rod 32 arranged transversely and two vertical rods 33 arranged longitudinally, the bottom rod 31, the top rod 32 and the two vertical rods 33 are sequentially connected end to end and spliced to form a rectangular frame, and the bottom rod 31 and the top rod 32 are arranged in parallel.
The top rod 32 is provided with a plurality of longitudinal holes 34 for accommodating the sleeves 21, so that a plurality of data are measured from the same side of the mortar sample to obtain an average value, the central axis of the longitudinal hole 34 is located in the vertical direction, and in the embodiment, the top rod 32 is provided with two longitudinal holes 34 as an example for explanation. In the present embodiment, the two vertical rods 33 are respectively provided with two transverse holes 35 for accommodating the sleeves 21, so that a plurality of data are measured at the same side of the mortar sample to obtain an average value, and the central axes of the transverse holes 35 are located in the horizontal direction.
Referring to fig. 2, the fixing frame 3 is provided with a fixing member for fixing the dial indicator 2, and the fixing member includes a plurality of bolts 5 for locking the dial indicator 2. Each longitudinal hole 34 is provided with a threaded hole 36 in a communicating mode, the central axis of each first threaded hole 36 is perpendicular to the central axis of each longitudinal hole 34, each first threaded hole 36 corresponds to one bolt 5, and each bolt 5 is in threaded connection with the corresponding first threaded hole 36; each transverse hole 35 is provided with a second threaded hole 37 in a communicating manner, the central axis of the second threaded hole 37 is perpendicular to the central axis of the longitudinal hole 34, each second threaded hole corresponds to one bolt 5, and the bolt 5 is in threaded connection with the second threaded hole 37.
There are two sets of clamping members 4, and two sets of clamping members 4 are arranged on the bottom rod 31 at intervals. The clamping member 4 includes a first clamping rod 41, a second clamping rod 42, and a fixing shaft 43 passing through the bottom rod 31. The length direction of the fixed shaft 43 is perpendicular to the length direction of the bottom rod 31, two ends of the fixed shaft 43 in the length direction respectively protrude out of two sides of the bottom rod 31, the first clamping rod 41 and the second clamping rod 42 are respectively located at two ends of the fixed shaft 43 protruding out of the bottom rod 31, so that a space for accommodating a mortar sample is formed between the first clamping rod 41 and the second clamping rod 42, and one side of the mortar sample is abutted against the upper end face of the bottom rod 31. The fixed shaft 43 may be fixedly connected to the bottom rod 31, and the fixed shaft 43 may be screwed to the bottom rod 31, and in this embodiment, the fixed shaft 43 is screwed to the bottom rod 31. The fixed shaft 43 is a bolt.
The first clamping rod 41 is sleeved on the fixed shaft 43 and rotatably connected to the fixed shaft 43, and a gap is formed between one end of the first clamping rod 41 away from the fixed shaft 43 and the top rod 32. The second clamping rod 42 is sleeved on the fixed shaft 43 and rotatably connected to the fixed shaft 43, and a gap is formed between one end of the second clamping rod 42 away from the fixed shaft 43 and the top rod 32. When the clamping member 4 is used for clamping a mortar sample, the longitudinal direction of the first clamping rod 41 and the second clamping rod 42 is perpendicular to the longitudinal direction of the bottom plate.
First clamping rod 41 and a plurality of bolt 5 are located the same side of mount 3, and fixed axle 43 is located the top of base 1 for second clamping rod 42 can rotate to both sides toward the direction of keeping away from the mount 3 center, and makes the length direction after second clamping rod 42 rotates can be on a parallel with the length direction of sill bar 31, thereby the clearance between first clamping rod 41 and the second clamping rod 42 is put into to the mortar sample of being convenient for from mount 3 second clamping rod 42 place one side. One end of the fixed shaft 43 is screwed with a nut to tightly press the second clamping rod 42 against the bottom rod 31, so that the mortar sample can be locked in the gap between the first clamping rod 41 and the second clamping rod 42 by the clamping member 4. After 4 centre gripping mortar samples of holder, be provided with the clearance between mortar sample up end and the ejector pin 32, the both sides on the mortar sample horizontal direction are provided with the clearance with two vertical poles 33 respectively for install behind mount 3 in amesdial 2, detect head 23 and mortar sample conflict, slide bar 22 contracts in the sleeve 21, makes and detects head 23 and has the space that moves along with the mortar sample shrink.
The base 1 comprises a first fixing block 11 and a second fixing block 12, sliding grooves 13 for sliding fit of a bottom rod 31 are respectively formed in the upper end faces of the first fixing block 11 and the second fixing block 12, two ends of the bottom rod 31 are respectively in sliding fit with the two sliding grooves 13, and the first fixing block 11 and the second fixing block 12 are arranged at intervals.
The device for measuring the shrinkage of mortar in multiple directions further includes a multi-way concentrator (not shown), and in this embodiment, an 8-way concentrator is taken as an example for description. After the dial indicator 2 used for measuring the mortar samples in the vertical direction and the horizontal direction is installed on the fixing frame 3, the dial indicator 2 is connected with a computer through the 8-way concentrator through the data output port 24, and therefore shrinkage rate data of the mortar samples measured by the dial indicators 2 can be collected simultaneously.
Example two
The difference between the second embodiment and the first embodiment is that one end of the first clamping rod 41 in the length direction is fixedly connected to the fixed shaft 43, and one end of the first clamping rod 41 away from the fixed shaft 43 is fixedly connected to the top rod 32; the second clamping rod 42 is sleeved on the fixed shaft 43 and rotatably connected to the fixed shaft 43, and one end of the second clamping rod 42 away from the fixed shaft 43 protrudes out of the top rod 32. When the clamping member 4 is used for clamping a mortar sample, the longitudinal direction of the first clamping rod 41 and the second clamping rod 42 is perpendicular to the longitudinal direction of the bottom plate.
The implementation principle of the device for measuring the shrinkage rate of the mortar in multiple directions of the embodiment of the application is as follows:
rotate two second supporting rods 42 respectively to the both sides of keeping away from mount 3 central point and putting, and make two second supporting rods 42 and sill bar 31 parallel, place the mortar sample in the clearance between first supporting rod 41 and second supporting rod 42, reset two second supporting rods 42 again, and screw up the nut on the fixed axle 43, lock first supporting rod 41 and second supporting rod 42 in mount 3, insert respectively in each horizontal hole 35 and longitudinal hole 34 the sleeve 21 of a plurality of amesdials 2, screw up each bolt 5 respectively, lock amesdial 2 on mount 3, amesdial 2 passes through data output port 24 and connects through 8 way concentrator and computer, thereby realize gathering the shrinkage factor data of the mortar sample three directions that many amesdials 2 measured simultaneously.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (10)
1. The utility model provides a device of diversified measurement mortar shrinkage, its characterized in that: including base (1), a plurality of amesdial (2) that are used for measuring mortar sample shrinkage factor, mount (3) that are used for installing a plurality of amesdials (2), holder (4) and the multichannel concentrator that are used for centre gripping mortar sample, mount (3) are installed in base (1), holder (4) are installed in mount (3), and are a plurality of amesdial (2) are located the ascending top of mount (3) vertical side and the ascending both sides of horizontal direction respectively, amesdial (2) are including data output port (24), amesdial (2) are connected through multichannel concentrator and computer through data output port (24).
2. The device for measuring the shrinkage rate of mortar in multiple directions according to claim 1, wherein: the fixing frame (3) comprises a transversely arranged bottom rod (31), a transversely arranged ejector rod (32) and two vertically arranged vertical rods (33), the bottom rod (31), the ejector rod (32) and the two vertical rods (33) are sequentially connected end to end and spliced to form a rectangular frame, the dial indicator (2) is located on the ejector rod (32) and the two vertical rods (33) respectively, and the bottom rod (31) is installed on the base (1).
3. The device for measuring the shrinkage rate of mortar in multiple directions according to claim 2, wherein: amesdial (2) include sleeve (21), ejector pin (32) are provided with a plurality of vertical holes (34) that are used for holding sleeve (21), the axis in vertical hole (34) is located vertical direction, two all be provided with a plurality of horizontal holes (35) that are used for holding sleeve (21) on vertical pole (33) respectively, the axis in horizontal hole (35) is located the horizontal direction, install the mounting that is used for locking amesdial (2) in mount (3) on mount (3).
4. The device for measuring the shrinkage rate of mortar in multiple directions according to claim 3, wherein: the mounting is including being used for a plurality of bolts (5) of contradicting with sleeve (21), every longitudinal hole (34) all communicate and are provided with first screw hole (36), bolt (5) threaded connection is in first screw hole (36), every transverse hole (35) all communicate and are provided with second screw hole (37), bolt (5) threaded connection is in second screw hole (37).
5. The device for measuring the shrinkage rate of mortar in multiple directions according to claim 1, wherein: holder (4) include first supporting rod (41), second supporting rod (42) and install in fixed axle (43) of sill bar (31), the length direction of the length direction perpendicular to sill bar (31) of fixed axle (43), the both ends of fixed axle (43) length direction bulge respectively in the both sides of sill bar (31), install respectively in the both ends of fixed axle (43) bulge in sill bar (31) first supporting rod (41), second supporting rod (42) cover is located fixed axle (43) and is connected with fixed axle (43) rotation, fixed axle (43) are located base (1) top.
6. The device for measuring the shrinkage rate of mortar in multiple directions according to claim 5, wherein: the fixed shaft (43) is fixedly connected to the bottom rod (31) or is in threaded connection with the bottom rod (31).
7. The device for measuring the shrinkage rate of mortar in multiple directions according to claim 5, wherein: the clamping pieces (4) are divided into two groups, and the two groups of clamping pieces (4) are arranged on the bottom rod (31) at intervals.
8. The device for measuring the shrinkage rate of mortar in multiple directions according to claim 5, wherein: the first clamping rod (41) is fixedly connected to the fixed shaft (43) or sleeved on the fixed shaft (43) and rotatably connected with the fixed shaft (43).
9. The device for measuring the shrinkage rate of mortar in multiple directions according to claim 5, wherein: the first clamping rod (41) and the plurality of bolts (5) are positioned on the same side of the fixing frame (3).
10. The device for measuring the shrinkage rate of mortar in multiple directions according to claim 1, wherein: base (1) includes first fixed block (11) and second fixed block (12), confession sill bar (31) sliding fit's sliding tray (13) have all been seted up separately to first fixed block (11) and second fixed block (12) up end, the both ends of sill bar (31) respectively with two sliding tray (13) sliding fit, first fixed block (11) and second fixed block (12) interval set up.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010728002.8A CN111765829A (en) | 2020-07-23 | 2020-07-23 | Device for measuring shrinkage rate of mortar in multiple directions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010728002.8A CN111765829A (en) | 2020-07-23 | 2020-07-23 | Device for measuring shrinkage rate of mortar in multiple directions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111765829A true CN111765829A (en) | 2020-10-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010728002.8A Pending CN111765829A (en) | 2020-07-23 | 2020-07-23 | Device for measuring shrinkage rate of mortar in multiple directions |
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| CN (1) | CN111765829A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113848120A (en) * | 2021-09-30 | 2021-12-28 | 浙江律通复合材料有限公司 | Composite material shrinkage rate test equipment |
-
2020
- 2020-07-23 CN CN202010728002.8A patent/CN111765829A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113848120A (en) * | 2021-09-30 | 2021-12-28 | 浙江律通复合材料有限公司 | Composite material shrinkage rate test equipment |
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