CN105510564B - Slump test carriage - Google Patents
Slump test carriage Download PDFInfo
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- CN105510564B CN105510564B CN201510980900.1A CN201510980900A CN105510564B CN 105510564 B CN105510564 B CN 105510564B CN 201510980900 A CN201510980900 A CN 201510980900A CN 105510564 B CN105510564 B CN 105510564B
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- flat board
- table top
- slump
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- 238000012360 testing method Methods 0.000 title claims abstract description 61
- 230000007246 mechanism Effects 0.000 claims abstract description 14
- 238000005259 measurement Methods 0.000 claims abstract description 7
- 229920001971 elastomer Polymers 0.000 claims description 11
- 239000005060 rubber Substances 0.000 claims description 11
- 238000004064 recycling Methods 0.000 claims description 8
- 210000005069 ears Anatomy 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 239000004033 plastic Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 8
- 238000004140 cleaning Methods 0.000 abstract description 3
- 238000000465 moulding Methods 0.000 description 4
- 239000004568 cement Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000006052 feed supplement Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 241000237858 Gastropoda Species 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000009863 impact test Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/38—Concrete; Lime; Mortar; Gypsum; Bricks; Ceramics; Glass
- G01N33/383—Concrete or cement
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Medicinal Chemistry (AREA)
- Food Science & Technology (AREA)
- Ceramic Engineering (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a kind of slump test carriage, it includes test barrel, trolley, ramming mechanism, measuring mechanism and cleaning structure, one is wherein provided with the table top of trolley can adjust the flat board of height and angle, with three-dimensional regulation ability, can facilitate leveling；Set on table top, on line slide rail and ramming mechanism is set on the first portal frame and the second portal frame, the first portal frame, measuring mechanism is set on second portal frame, cleaning mechanism is arranged on flat board, is used cooperatively with the blanking port on table top, and a concrete recycle bucket is fixed below blanking port.This slump test carriage is tested suitable for on-site concrete slump, the levelness that test platform is adjusted can be adjusted according to place, ensure the accuracy of measurement result, tamping, demoulding dynamics, process more specification provide support accurately to determine slump.
Description
Technical field
The invention is related to slump testing tool technical field, specifically it is a kind of be easy to movable type, can
To realize the slump test carriage of standardization measurement.
Background technology
The plasticizing capacity and pumpable performance of slump key reaction concrete, influence slump it is main because
Have raw material, mixing time, Transport Machinery, speed of perfusion, pour time etc., the consumption of another additive and easily ignored
Cement temperatures also can influence index.
Slump refers to the workability of concrete, is specifically ensuring that being normally carried out for construction, wherein wrapping
Include the water-retaining property of concrete, mobility and cohesiveness.
The method of testing of existing conventional slump：It is horn-like with a 100mm suitable for reading, lower mouth 200mm, high 300mm
Consolidated after slump bucket, penetration concrete, then pull up bucket, concrete produces slump phenomenon because of deadweight, subtracted with bucket high (300mm)
The height of concrete peak after slump, referred to as slump are gone, with reference to Fig. 1, if difference is 10mm, slump is 10.
The slump detection bucket for example in Chinese patent literature CN 202330423U announced, that is above-mentioned detection method
Instrument in one used.
The subject matter that existing method of testing is present is：
Inadequate specification is operated, completely by personnel control, for example, the strength size according to operating personnel is consolidated, it is close that it is consolidated
Difference is spent, is risen during bucket, concrete, which can glue, to be paid on bucket wall, forms negative-pressure adsorption power so that sample is in short transverse
On be elongated, cause the secondary destruction of sample, influence test effect.
Whether level has a major impact test platform to test result, and existing test process is basically on the ground
Tested, it is impossible to ensure the levelness of platform.
Amid all these factors so that existing testing tool has much room for improvement.
The content of the invention
Found at the scene in work progress, current slump test is relatively lack of standardization, it is impossible to realize standardization, rule
Generalized is operated, and slump fieldtesting results error is big, is tested for the live slump of specification concrete, is improved concrete and is showed
The accuracy of field slump test, makes slump test carriage, improves the combination property of test.
The technical solution adopted for the present invention to solve the technical problems is：
Slump test carriage, it is characterised in that：Including
Test barrel, flanging is provided with the bottom of test barrel, is set and is picked up the ears in the outer upper of test barrel, and on picking up the ears
Steel wire rope and hook are set；
There is a table top, one is provided with table top can adjust highly flat with angle on trolley, trolley
Plate, is hinged with three rod members on the downside of flat board, is used between the rod member and flat board and passes through platform in the middle part of ball-joint, the rod member
Face simultaneously extends to downside, and the axis hole of a worm gear is coordinated for screwed hole and with the thread segment on rod member, under corresponding table top
One worm screw is set on side, and the worm and wheel is coordinated, and worm screw extends to side, and handle is set in end；
Fix a side plate respectively in the both sides of flat board, an Experimental Area is formed together with flat board, in the test block
Test barrel is placed in domain, one the first cylinder is set in the rear side of flat board, first cylinder is horizontally disposed, in the first cylinder
Piston rod on a push pedal is installed, push pedal enters line slip along side plate direction；
Set on the table top of flat board both sides and the first portal frame and second are set on a pair of line slide rails, the line slide rail
Portal frame,
Ramming mechanism is set on the first portal frame, the ramming mechanism include fixed disk, screw shell, the first cylinder,
Second cylinder and spring, wherein fixed disk are arranged on the middle part of the first portal frame crossbeam, and screw shell is vertically arranged and lower end covers
Put on fixed disk, the first cylinder is connected through a screw thread to be linked with screw shell, in the first cylinder, fixed disk and measurement
Be provided with corresponding through hole, and the second cylinder middle part through the through hole on three parts, the second cylinder bottom is provided with one
Head is expanded in individual tamping, and is provided with head is expanded circular hole, at the top of the second cylinder top and the first cylinder between be nested with
There is a spring, a passage is provided with the second cylinder；
One push rod is set respectively on the both sides heel post of the first portal frame, and push rod is locked in vertical by two nuts
On post and position is adjustable, the one arc pressure strip of form active link for passing through ball-joint at the top of push rod；First dragon
Door frame can shift one's position along line slideway, and set locking device between the first portal frame and table top；
The locking device is：Pin-and-hole is set on the first portal frame, one is set on the table top at corresponding locking position
Pin-and-hole is set in individual projection, projection, the first portal frame is locked by round pin；
The top center position of second portal frame is provided with vertical graduated scale；
Provided with a blanking port on the table top away from push pedal side, a concrete recycle is fixed below blanking port
Bucket.
Further, horizontal and vertical bubble and scale is installed on flat board.
Further, it is provided with the second portal frame centre in a rubber stopper, the rubber stopper and is provided with a seam
Gap, the graduated scale is just interspersed in gap.
Further, blocked between the flat board and table top using sheet rubber.
Further, the recycling bin is multiple.
Further, the push pedal is plastic scrapers.
The beneficial effects of the invention are as follows：With following function：
Levelling function, can ensure that coagulation mound to be tested is in optimal state, it is to avoid produce inclination by leveling
Phenomenon, it is ensured that the authenticity and validity of slump process.
Play mold process steadily effective, molding is aided in by cylinder, it is to avoid double swerve, deflection that both hands molding is brought etc. are asked
Topic, and quick molding is advantageously implemented, improve the integrality of initial model.
It is easy to cleaning, is cleaned by push pedal, it is more quick and effective.
This slump test carriage is tested suitable for on-site concrete slump, can be adjusted according to place
Save the levelness of test platform, it is ensured that the accuracy of measurement result, tamping, demoulding dynamics, process more specification are accurate survey
Determine slump and provide support, and then can preferably control site operation, improve construction quality.
Brief description of the drawings
Fig. 1 is the theoretical view that slump is tested.
Fig. 2 is schematic diagram of the invention.
Fig. 3 is stereogram (removal test barrel) of the invention.
Fig. 4 is the stereogram of test barrel.
Fig. 5 is stereogram of the invention.
Fig. 6 is Fig. 5 top view.
Fig. 7 is Fig. 5 longitudinal sectional view.
Fig. 8 is Fig. 5 transverse sectional view.
Fig. 9 is rod member, the structure chart of worm and gear.
Figure 10 is overall schematic of the invention.
The sectional view of Figure 11 ramming mechanisms.
In figure：1 test barrel, 11 flangings, 12 pick up the ears, 13 steel wire ropes and hook, 2 trolleys, 21 road wheels, 22 table tops,
23 handles, 3 recycling bins, 31 blanking ports, 4 flat boards, 41 rod members, 42 ball-joints, 43 sleeves, 44 screw threads, 45 worm gears, 46 worm screws, 48
Bubble and scale, 47 side plates, 5 Experimental Areas, 51 first cylinders, 52 push pedals, 6 line slide rails, 61 first portal frames, 611 is swollen
Major part, 612 ramming mechanisms, 6121 fixed disks, 6122 screw shells, 6,123 first cylinders, 6,124 second cylinders, 6125 springs,
6126 passages, 613 circular holes, 614 push rods, 615 nuts, 616 arc pressure strips, 617 locking devices, 62 second portal frames, 621 quarters
Spend chi, 7 sheet rubbers.
Embodiment
For existing defect, exploitation is a kind of slump test carriage, is changed to survey by original single test bucket
Test run, main purpose is accuracy and the standardization for improving test, it is to avoid the adverse effect that manual operation is brought.
Its basic principle is that hand punning is changed into mechanical puddling, and the dynamics of tamping, time can set, and forms mark
Standardization, increases the Level tune function of platform, forms horizontality, and further improve overall operating performance and operation
Convenience.
Based on the description above, with reference to shown in Fig. 2 to Figure 10, its structure is described in detail below：
Test barrel 1 is installed, the test barrel 1 is generally conical, such as Fig. 4, flanging 11 is provided with the bottom of test barrel, use
Contacted in platform, increase contact area.And set in the outer upper of test barrel 1 and pick up the ears 12, for lifting and hanging,
And steel wire rope and hook 13 are set on picking up the ears.Above-mentioned test barrel is to be improved what is formed on the basis of traditional test barrel.
Trolley 2, carries out welding formation, with road wheel 21, table top 22 and handle 23, wherein platform using stainless steel
Face 22 is stainless steel platform, for the main occasion of experiment, and lower section sets recycling bin 3 to reclaim space reclaiming in space, wherein
The shape of recycling bin 3 it is optimal for rectangle staving.Road wheel is the universal wheel with locking mechanism, realizes locking in real time.
Centre position, which is provided with one, on table top 22 can adjust the flat board 4 of height and angle, specifically, in flat board 4
Downside be hinged with three rod members 41, three are attached between rod member and flat board using the pattern of ball-joint 42, i.e. at three
Rod member 41 can be rotated, and three middle parts of rod member 41 are placed through the sleeve 43 on table top, wherein, in rod member hypomere one section of spiral shell of formation
Line 44, wherein, another worm gear 45, the axis hole of worm gear 45 is processed into screwed hole, the screwed hole and the thread segment on rod member 41
Coordinated, a worm screw 46 is being set on corresponding table top downside, and worm and wheel is coordinated, driving, snail is formed
Bar 46 extends to side, and sets handle, the rotation for controlling worm gear, and then drives the motion of rod member in the vertical direction.
It is independent of each other between three above-mentioned rod members 41, by controlling different rod members to adjust the level of flat board
Degree, further, installs horizontal and vertical bubble and scale 48, the levelness for indicating flat board on flat board.
When trolley 2 is located on slope, the flat board 4 above-mentioned by adjusting to level, it is possible to achieve under varying environment
Test job.
Fix a side plate 47 respectively in the both sides of flat board 4, an Experimental Area 5 is formed together with flat board, in test block
Test barrel is placed in domain, one the first cylinder 51 is set in the rear side free space of flat board, the first cylinder is horizontally disposed, the
One push pedal 52 is installed, push pedal uses plastic scrapers, for clearing up the cement residue on flat board on the piston rod of one cylinder 51.
Set on the table top of the both sides of flat board 4 and first portal frame 61 and are set on a pair of line slide rails 6, line slide rail 6
Two portal frames 62, wherein the size of the first portal frame 61 is larger, set ramming mechanism 612, the ramming mechanism on the first portal frame
612 include fixed disk 6121, screw shell 6122, the first cylinder 6123, the second cylinder 6124 and spring 6125, wherein fixed disk
6121 are arranged on the middle part of the first portal frame crossbeam, and screw shell 6122 is vertically arranged, and lower end is nested with fixed disk, in spiral shell
The inner surface of line sleeve be provided with screw thread, the first cylinder 6123 is connected through a screw thread to be linked with screw shell, the first cylinder,
Corresponding through hole is provided with fixed disk and measurement, penetrating above and below the through hole, the middle part of the second cylinder 6124 passes through three parts
On through hole.Second cylinder includes the part of upper, middle and lower three, and its middle and upper part is divided into a cylinder being relatively large in diameter, and middle part is straight
The less cylinder in footpath, bottom expands first 611 provided with tamping, and is provided with head is expanded circular hole 613, the circular hole
613 be miscellaneous function hole, is had certain effect in molding stage tool.It is equipped between at the top of second cylinder top and the first cylinder
One spring 6125, is a preloading spring, meanwhile, a passage 6126 is provided with the second cylinder, for concrete
Addition.
One horizontal push rod 614 is set respectively on the both sides heel post of the first portal frame 61, and push rod locally has screw thread,
Push rod is locked by two nuts 615, and position is adjustable, the form active link for passing through ball-joint at the top of push rod 614
One arc pressure strip 616, arc pressure strip 616 acts directly on the middle part of the outer wall of test barrel 1, will be upper by two pressure strips
The test barrel stated is fixed on flat board 4.
The above-mentioned frame of first gantry 61 can shift one's position along line slideway, and be needed according to position to be locked, its
In locking device 617 be that pin-and-hole is set on first gantry 61, on the table top at corresponding locking position set one dash forward
Rise, pin-and-hole is set in projection, the first portal frame is locked by round pin.
Second portal frame 62 is measurement support, is also to be arranged on by sliding block on line slide rail 6, and in the second portal frame
Side is provided with the pin-and-hole of locking, and vertical graduated scale 621 is provided with the top center position of the second portal frame.Specifically
Ground, is provided with a rubber stopper, rubber stopper in the second portal frame centre and is provided with a gap, and graduated scale 621 is just interspersed
In gap, above-mentioned graduated scale is clamped in by certain position by the deformation of rubber stopper, it is possible to twitched, for measuring
Slump.
Blocked between above-mentioned flat board 4 and table top 22 using sheet rubber 7, prevent cement dirt from proceeding between the two
Space in, be safeguard procedures.
It is to fix one below rectangle, blanking port provided with a blanking port 31 on the table top away from the side of push pedal 52
Individual concrete recycle bucket 3, the presence of the recycling bin allows the concrete after test to be timely recovered.
As a further improvement, recycling bin is multiple, sets multiple in the lower section of table top, select, go forward side by side as needed
The of short duration storage of row.
The first above-mentioned cylinder and the second cylinder controlled starting control system, are routine techniques.
Application method is as follows：
Trolley is pushed into suitable place, flat board is then adjusted to horizontality, test barrel is placed on flat board, lead to
Funnel is crossed to concrete slurry is filled inside test barrel, then is moved through coming and fixed by the first portal frame, passes through the arc of both sides
Shape plate is compressed above-mentioned test barrel, starts the first cylinder, under the reciprocating motion of the first cylinder, carries out tamping operation,
Cylinder is consolidated, and dynamics can be controlled and relatively accurate, and carries out according to the situation of tamping the feed supplement of concrete, and feed supplement is by the
Passage in two cylinders is finally reached the height of requirement of experiment, then removes funnel to progress feed supplement inside test barrel
Remove, and struck off at the top of test barrel.
The steel wire rope and hook of test barrel both sides are hung on the through hole for expanding head, connection is formed, finally in the first cylinder
In the presence of above-mentioned test barrel is separated with coagulation mound to be tested.
The first portal frame is moved into correct position after separation, and the second portal frame is moved through coming, it is stand-by, during by regulation
Between after, measure the difference in height of slump, obtain slump numerical value, complete test.
The above-described embodiments are merely illustrative of preferred embodiments of the present invention, not to the model of the present invention
Enclose and be defined, on the premise of design spirit of the present invention is not departed from, various changes of the relevant technical staff in the field to the present invention
Shape and improvement, all should expand as determined by claims of the present invention in protection domain.
Claims (6)
1. slump test carriage, it is characterised in that：Including
Test barrel (1), flanging (11) is provided with the bottom of test barrel, is set in the outer upper of test barrel (1) and is picked up the ears (12),
And steel wire rope and hook (13) are set on picking up the ears；
There is a table top (22), one is provided with table top (22) can adjust height and angle on trolley (2), trolley
The flat board (4) of degree, is hinged with three rod members (41) on the downside of flat board (4), and ball-joint is used between the rod member and flat board
(42) table top, is passed through in the middle part of the rod member (41) and downside is extended to, the axis hole of a worm gear (45) is screwed hole and and rod member
(41) thread segment on is coordinated, and a worm screw (46) is set on corresponding table top downside, and the worm and wheel enters
Row coordinates, and worm screw (46) extends to side, and sets handle in end；
Fix a side plate (47) respectively in the both sides of flat board (4), an Experimental Area (5) is formed together with flat board, described
Test barrel is placed in Experimental Area, one the first cylinder (51) is set in the rear side of flat board (4), first cylinder (51) is water
It is flat to set, a push pedal (52) is installed on the piston rod of the first cylinder (51), push pedal enters line slip along side plate direction；
Set on the table top of flat board (4) both sides and the first portal frame is set on a pair of line slide rails (6), the line slide rail (6)
(61) and the second portal frame (62),
Ramming mechanism (612) is set on the first portal frame, and the ramming mechanism (612) includes fixed disk (6121), thread bush
Cylinder (6122), the first cylinder (6123), the second cylinder (6124) and spring (6125), wherein fixed disk (6121) are arranged on first
The middle part of portal frame crossbeam, screw shell (6122) is vertically arranged and lower end is nested with fixed disk, and the first cylinder (6123) leads to
Cross threaded connection to be linked with screw shell, corresponding through hole, and second are provided with the first cylinder, fixed disk and measurement
The middle part of cylinder (6124) is through the through hole on three parts, and head is expanded in the second cylinder bottom provided with tamping
(611), and on head is expanded be provided with circular hole (613), at the top of the second cylinder top and the first cylinder between be equipped with one
Spring (6125), is provided with a passage (6126) in the second cylinder；
One push rod (614) is set respectively on the both sides heel post of the first portal frame (61), and push rod passes through two nuts (615)
It is locked on column and position is adjustable, the one arc pressure of form active link for passing through ball-joint at the top of push rod (614)
Tight plate (616)；First portal frame (61) can be shifted one's position along line slideway, and between the first portal frame and table top
Locking device (617) is set；
The locking device is：Pin-and-hole is set on the first portal frame (61), one is set on the table top at corresponding locking position
Pin-and-hole is set in individual projection, projection, the first portal frame is locked by round pin；
The top center position of second portal frame (62) is provided with vertical graduated scale (621)；
Provided with a blanking port (31) on the table top away from push pedal (52) side, a concrete is fixed below blanking port
Recycling bin (3).
2. slump test carriage according to claim 1, it is characterised in that install horizontal and vertical on flat board
Bubble and scale (48).
3. slump test carriage according to claim 1, it is characterised in that set in the second portal frame centre
Have and a gap is provided with a rubber stopper, the rubber stopper, the graduated scale (621) is just interspersed in gap.
4. slump test carriage according to claim 1, it is characterised in that the flat board (4) and table top (22)
Between blocked using sheet rubber (7).
5. slump test carriage according to claim 1, it is characterised in that the recycling bin is multiple.
6. slump test carriage according to claim 1, it is characterised in that the push pedal is plastic scrapers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510980900.1A CN105510564B (en) | 2015-12-23 | 2015-12-23 | Slump test carriage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510980900.1A CN105510564B (en) | 2015-12-23 | 2015-12-23 | Slump test carriage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105510564A CN105510564A (en) | 2016-04-20 |
| CN105510564B true CN105510564B (en) | 2017-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510980900.1A Active CN105510564B (en) | 2015-12-23 | 2015-12-23 | Slump test carriage |
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| Country | Link |
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| CN (1) | CN105510564B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107179261B (en) * | 2017-07-04 | 2023-09-01 | 济南大学 | Automatic concrete slump testing equipment and testing method thereof |
| JP2019120700A (en) * | 2017-12-28 | 2019-07-22 | 株式会社マルイ | measurement tool |
| CN113466438B (en) * | 2021-05-19 | 2024-04-09 | 湖南己太项目管理有限公司 | Material detecting system for supervision of building engineering |
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| CN202083688U (en) * | 2011-05-18 | 2011-12-21 | 长沙理工大学 | Cement concrete slump measuring device |
| CN202330418U (en) * | 2011-11-30 | 2012-07-11 | 成都市市政工程（集团）有限责任公司 | Convenient slump testing barrel capable of preventing leakage of slurry |
| CN203083993U (en) * | 2012-12-21 | 2013-07-24 | 江西迪特科技有限公司 | Automatic concrete slump constant determinator |
| CN203133072U (en) * | 2013-03-09 | 2013-08-14 | 葛洲坝集团试验检测有限公司 | United measuring device for diffusance and slump of concrete mixture |
| CN203337656U (en) * | 2013-03-27 | 2013-12-11 | 郭奇 | Novel working performance tester of high-slump concrete |
| CN203310832U (en) * | 2013-07-15 | 2013-11-27 | 淮阴工学院 | Concrete slump instrument |
| CN203643450U (en) * | 2014-01-02 | 2014-06-11 | 中联重科股份有限公司 | Measuring device for concrete slump |
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