CN113237753B - Concrete shrinkage creep analysis device and method thereof - Google Patents
Concrete shrinkage creep analysis device and method thereof Download PDFInfo
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- CN113237753B CN113237753B CN202110509750.1A CN202110509750A CN113237753B CN 113237753 B CN113237753 B CN 113237753B CN 202110509750 A CN202110509750 A CN 202110509750A CN 113237753 B CN113237753 B CN 113237753B
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- 238000004458 analytical method Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims description 7
- 238000004804 winding Methods 0.000 claims abstract description 6
- 238000003860 storage Methods 0.000 claims description 4
- 238000005452 bending Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 17
- 238000003825 pressing Methods 0.000 abstract description 4
- 238000005457 optimization Methods 0.000 description 6
- 238000007493 shaping process Methods 0.000 description 3
- 230000001174 ascending effect Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000004575 stone Substances 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
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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Abstract
The invention relates to the technical field of concrete shrinkage and creep, and discloses a concrete shrinkage and creep analysis device which comprises a base, wherein a support rod is fixedly arranged on the inner wall of the base, a pressing plate is fixedly arranged at the top end of the support rod, a top column is fixedly arranged at the top end of the base, an object placing plate is fixedly arranged at the top end of the top column, a telescopic rod is fixedly arranged at the top end of the inner wall of the top column, a hinged seat is rotationally matched with a rope seat to start winding a pull rope, a moving plate drives a guide wheel to roll along the inner wall of the support rod by moving, a movable seat is driven to slide along the inner wall of an object placing groove by moving of a connecting plate under the assistance of a limiting rod, a supporting rod is matched with the movable seat to drive an attachment plate to move, when the bottom end area of concrete is larger than the top end area of the object placing plate, the attachment plate just moves to be aligned with the object placing plate, therefore, the effect of synchronously adjusting the bearing area of the bottom end according to the size and the shape of the concrete is realized.
Description
Technical Field
The invention relates to the technical field of concrete shrinkage and creep, in particular to a concrete shrinkage and creep analysis device and a method thereof.
Background
The concrete is finally obtained by taking cement as a main cementing material, filling water, sand and stones into the cement, and controlling the mixture ratio to stir and form, and in view of the fact that the concrete is commonly used in the field of buildings, the index of the concrete is strictly controlled, and creep analysis needs to be carried out on the formed concrete in the early stage of use.
Therefore, a concrete shrinkage and creep analysis device and a method thereof are needed, and the device has the function that when the device is used, a user places formed concrete on the device, and the bearing area of the bottom end is synchronously adjusted according to the size and the shape of the concrete, so that the moderate area of the bottom end is ensured.
Placing the shaping concrete on the top of putting the thing board, pendulum rod and concrete outer wall contact at first, the pendulum rod receives behind the extrusion normal running fit and is driving the movable plate to rise at the articulated seat, the rising cooperation of movable plate the connecting rod is driving the linkage plate and is shifting up, and final attachment strap rises, and when concrete bottom area was greater than the top area of putting the thing board, the attachment strap just moved to and put the thing board cooperation of counterpointing this moment.
Disclosure of Invention
In order to realize the purpose of adjusting the bearing area of the bottom end according to the size of the concrete, the invention provides the following technical scheme: the concrete shrinkage creep analysis device comprises a base, wherein a support rod is fixedly installed on the inner wall of the base, a pressing plate is fixedly installed at the top end of the support rod, a top post is fixedly installed at the top end of the base, an object placing plate is fixedly installed at the top end of the top post, a telescopic rod is fixedly installed at the top end of the inner wall of the top post, a connecting plate is fixedly installed at the bottom end of the telescopic rod, movable seats are fixedly installed on the left side and the right side of the connecting plate respectively, an object placing groove is formed in the inner wall of the top post, a limiting rod is fixedly installed on the inner wall of the object placing groove, a support rod is fixedly installed on the outer wall of the movable seat, an attachment strap is fixedly installed at the top end of the support rod, a connecting rod is fixedly installed on the front side of the connecting plate, a ring sleeve is fixedly installed on the outer wall of the support rod, a convex seat is embedded in the inner wall of the ring sleeve, and a hinge seat is movably connected with the inner wall of the convex seat, the outer wall fixed mounting of articulated seat has the pendulum rod, the top fixed mounting of connecting rod has the ball, the outer wall activity fixed mounting of ball has the movable plate, the top joint of movable plate has the guide pulley, the equal fixed mounting in the left and right sides of movable plate has the negative pressure pole, the top fixed mounting of negative pressure pole has the stay cord, the outer wall swing joint of stay cord has the rope socket.
As optimization, the inner wall of attachment strap and the outer wall swing joint who puts the thing board, the outer wall of bracing piece and the inner wall sliding connection of fore-set for guarantee the attachment strap with put the thing board and stabilize the counterpoint cooperation for the increase of bottom area has guaranteed the gliding stability of bracing piece simultaneously.
As optimization, the outer wall of gag lever post and the outer wall joint of sliding seat, and the outer wall of sliding seat and the inner wall sliding connection who puts the thing groove, in order to guarantee the stability that the sliding seat removed, further assurance the steady effect of access board in the stage that rises.
As an optimization, the outer wall of the connecting plate is in sliding connection with the inner wall of the top column, the outer wall of the connecting rod is in sliding connection with the inner wall of the top column, the two supporting rods are in a moving stage in a consistent pace, and meanwhile the sliding stability of the connecting rod is guaranteed.
As an optimization, the outer wall of the connecting rod is slidably connected with the inner wall of the supporting rod, and the outer wall of the moving plate is slidably connected with the inner wall of the supporting rod, so that the connecting rod moves with the assistance of the ball along with the movement of the moving plate, and the effect that the moving plate is not interfered when moving is guaranteed.
Preferably, the outer wall of the guide wheel is in rolling connection with the inner wall of the support rod, the outer wall of the left side of the rope seat is fixedly mounted with the inner wall of the support rod, and the rope guide mechanism has the effect of limiting the path of the pull rope at the same time in order to achieve the silky sliding property that the moving plate moves along the inner wall of the support rod.
As the optimization, the top of stay cord and the outer wall fixed mounting who articulates the seat, the inner wall fixed mounting who articulates the seat has the torsional spring, the quantity of pendulum rod is two, and left side pendulum rod is located the below of right side pendulum rod, and in order to realize driving the stay cord along with the rotation of pendulum rod and twining, further cooperating the negative pressure pole and driving the movable plate and remove, guaranteed the effect that the pendulum rod can in time reset after the experiment simultaneously.
As optimization, the bracing piece, put the quantity of thing groove and gag lever post and be two, two bracing pieces, put the perpendicular central line that thing groove and gag lever post all used the fore-set and all use as centrosymmetric evenly distributed, in order to guarantee the stability of strap when going on to rise, avoid one side to take place the slope, cause and put the effect that the thing board counterpointed and appear the clearance.
The concrete shrinkage creep analysis method comprises the following specific steps:
s1, placing the formed concrete on the top end of the object placing plate, wherein the outer wall of the concrete at the initial stage is in contact with the swing rod, and the swing rod is pressed to rotate under the assistance of the hinge base;
s2, bending the torsion spring along with the rotation of the hinged seat, further winding the pull rope with the assistance of the rope seat, and driving the negative pressure rod to move as the pull rope is pulled to gradually retract;
s3, the movement of the negative pressure rod is matched with the moving plate to drive the ball to slide, and the movement of the ball is matched with the connecting rod to drive the connecting plate to slide along the inner wall of the top column;
s4, when sliding, the connecting plate not only extrudes the telescopic rod to retract, but also drives the movable seat to slide along the inner wall of the object placing groove under the limit of the limiting rod;
s5, the movable seat moves to drive the supporting rod to move upwards, and the supporting rod moves upwards to drive the butt strap to slide along the outer wall of the object placing plate;
and S6, when the bottom end area of the concrete is larger than the top end area of the object placing plate, the access plate just moves to be in contraposition fit with the object placing plate, and finally the bottom end area is ensured to be moderate.
The invention has the beneficial effects that: the concrete shrinkage and creep analysis device and the method thereof are characterized in that a user places the concrete to be analyzed at the top end of an object placing plate, the outer wall of the concrete is firstly contacted with a swing rod to enable the swing rod to be pressed to rotate under the assistance of a hinged seat, the hinged seat is rotationally matched with a rope seat to start winding a pull rope, the pull rope is pulled to be matched with a negative pressure rod to drive a movable plate to move, the movable plate drives a guide wheel to roll along the inner wall of a support rod, the connecting rod is driven to move by being matched with a ball, the connecting rod drives a connecting plate to slide along the inner wall of a support column, the connecting plate drives a movable seat to slide along the inner wall of an object placing groove under the assistance of a limiting rod, the movable seat drives an attachment plate to move by being matched with a support rod in a sliding manner, when the area of the bottom end of the concrete is larger than the area of the top end of the object placing plate, the attachment plate just moves to be aligned and matched with the object placing plate, therefore, the effect of synchronously adjusting the bearing area of the bottom end according to the size and the shape of the concrete and ensuring the moderate area of the bottom end is achieved.
Drawings
FIG. 1 is a schematic view of a creep analysis apparatus according to the present invention;
FIG. 2 is a schematic view of a half-section structure of the top pillar of the present invention;
FIG. 3 is a schematic view of a truncated front view of the base of the present invention;
FIG. 4 is a schematic view of a cut-away rear view of the base of the present invention;
FIG. 5 is a schematic top view of the loop of the present invention;
FIG. 6 is a schematic bottom view of the loop of the present invention.
In the figure: 1. a base; 2. a strut; 3. pressing a plate; 4. a top pillar; 5. a storage plate; 6. a butt strap; 7. a telescopic rod; 8. a support bar; 9. a storage groove; 10. a limiting rod; 11. a movable seat; 12. a connector tile; 13. a connecting rod; 14. sleeving a ring; 15. a boss; 16. a swing rod; 17. a ball; 18. moving the plate; 19. a guide wheel; 20. a negative pressure lever; 21. pulling a rope; 22. a rope seat; 23. a hinged seat.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-6, the concrete shrinkage creep analysis device comprises a base 1, a supporting rod 2 is fixedly installed on the inner wall of the base 1, a pressing plate 3 is fixedly installed on the top end of the supporting rod 2, a top post 4 is fixedly installed on the top end of the base 1, an object placing plate 5 is fixedly installed on the top end of the top post 4, a telescopic rod 7 is fixedly installed on the top end of the inner wall of the top post 4, a connecting plate 12 is fixedly installed on the bottom end of the telescopic rod 7, movable seats 11 are fixedly installed on the left side and the right side of the connecting plate 12, an object placing groove 9 is formed in the inner wall of the top post 4, a limiting rod 10 is fixedly installed on the inner wall of the object placing groove 9, a supporting rod 8 is fixedly installed on the outer wall of the movable seat 11, a butt plate 6 is fixedly installed on the top end of the supporting rod 8, a connecting rod 13 is fixedly installed on the front side of the connecting plate 12, a ring sleeve 14 is fixedly installed on the outer wall of the supporting rod 2, a convex seat 15 is embedded in the inner wall of the ring sleeve 14, and a hinge seat 23 is movably connected to the inner wall of the convex seat 15, the outer wall fixed mounting of articulated seat 23 has pendulum rod 16, the top fixed mounting of connecting rod 13 has ball 17, the outer wall movable fixed mounting of ball 17 has movable plate 18, the top joint of movable plate 18 has guide pulley 19, the equal fixed mounting in the left and right sides of movable plate 18 has negative pressure pole 20, the top fixed mounting of negative pressure pole 20 has stay cord 21, the outer wall swing joint of stay cord 21 has rope socket 22, in order to realize that equipment is when creep the analysis to the shaping concrete, make the effect that the bottom end area was transferred into according to the size of shaping concrete, avoided because not unidimensional concrete area differs and cause the bottom stress to give incompletely, the effect of traditional needs according to the concrete size change of carrying out device size has been got rid of.
Please refer to fig. 2-6, the inner wall of the strap 6 is movably connected to the outer wall of the object placing plate 5, the outer wall of the support rod 8 is slidably connected to the inner wall of the top post 4, in order to ensure the strap 6 and the object placing plate 5 to be stably aligned and matched, so as to increase the bottom area and ensure the stability of the sliding of the support rod 8, the outer wall of the limit rod 10 is connected to the outer wall of the movable seat 11, and the outer wall of the movable seat 11 is slidably connected to the inner wall of the object placing groove 9, in order to ensure the stability of the movement of the movable seat 11, further ensure the stable effect of the strap 6 in the ascending stage, the outer wall of the connecting plate 12 is slidably connected to the inner wall of the top post 4, the outer wall of the connecting rod 13 is slidably connected to the inner wall of the top post 4, in order to achieve the step adjustment of the moving stages of the two support rods 8, and ensure the stability of the sliding of the connecting rod 13.
Referring to fig. 2-5, the outer wall of the connecting rod 13 is slidably connected to the inner wall of the supporting rod 2, the outer wall of the moving plate 18 is slidably connected to the inner wall of the supporting rod 2, in order to achieve the effect that the connecting rod 13 moves with the moving plate 18 with the assistance of the sphere 17 and ensure the effect that the moving plate 18 is not interfered when moving, the outer wall of the guide wheel 19 is in rolling connection with the inner wall of the supporting rod 2, the outer wall of the left side of the rope seat 22 is fixedly installed to the inner wall of the supporting rod 2, in order to achieve the effect that the moving plate 18 moves along the inner wall of the supporting rod 2 with silkiness and at the same time limits the path of the pull rope 21, the top end of the pull rope 21 is fixedly installed to the outer wall of the hinge seat 23, the inner wall of the hinge seat 23 is fixedly installed with torsion springs, the number of the two swing rods 16 is, the swing rod 16 on the left side is located below the swing rod 16, in order to achieve the effect that the pull rope 21 is wound along with the rotation of the swing rod 16, the negative pressure rod 20 is further matched to drive the moving plate 18 to move, and meanwhile, the effect that the swing rod 16 can be timely reset after the experiment is finished is guaranteed.
Referring to fig. 2, the number of the support rods 8, the article placing grooves 9 and the limiting rods 10 is two, and the two support rods 8, the article placing grooves 9 and the limiting rods 10 are symmetrically and uniformly distributed with the vertical center line of the top pillar 4 as the center, so as to ensure the stability of the access board 6 during ascending and avoid the phenomenon that one side is inclined to cause the gap between the access board and the article placing plate 5.
The concrete shrinkage creep analysis method comprises the following specific steps:
s1, placing the molded concrete on the top end of the object placing plate 5, wherein the outer wall of the initial stage concrete is in contact with the swing rod 16, and the swing rod 16 is pressed to rotate under the assistance of the hinge seat 23;
s2, bending the torsion spring along with the rotation of the hinged seat 23, further winding the pull rope 21 under the assistance of the rope seat 22, and driving the negative pressure rod 20 to move as the pull rope 21 is gradually retracted due to the pulling;
s3, the movement of the negative pressure rod 20 is matched with the moving plate 18 to drive the round ball 17 to slide, and the movement of the round ball 17 is matched with the connecting rod 13 to drive the connecting plate 12 to slide along the inner wall of the top column 4;
s4, when sliding, the connecting plate 12 not only extrudes the telescopic rod 7 to retract, but also drives the movable seat 11 to slide along the inner wall of the storage groove 9 under the limit of the limit rod 10;
s5, the movable seat 11 moves to drive the support rod 8 to move upwards, and the support rod 8 moves upwards to drive the attachment plate 6 to slide along the outer wall of the object placing plate 5;
s6, when the bottom end area of the concrete is larger than the top end area of the object placing plate 5, the butt strap 6 moves right to be matched with the object placing plate 5 in an aligning way, and finally the bottom end area is ensured to be moderate.
To sum up, the concrete shrinkage creep analysis device and the method thereof are characterized in that a user places the concrete to be analyzed on the top end of an object placing plate 5, the outer wall of the concrete is firstly contacted with a swing rod 16 so that the swing rod 16 is pressed to rotate under the assistance of a hinge seat 23, the hinge seat 23 is in running fit with a rope seat 22 to start winding a pull rope 21, the pull rope 21 is pulled to match with a negative pressure rod 20 to drive a movable plate 18 to move, the movable plate 18 moves to drive a guide wheel 19 to roll along the inner wall of a support rod 2, meanwhile, the round ball 17 drives a connecting rod 13 to move, the connecting rod 13 moves to drive a connecting plate 12 to slide along the inner wall of a top column 4, the movable seat 11 is driven by the movement of the connecting plate 12 under the assistance of a limiting rod 10 to slide along the inner wall of an object placing groove 9, the movable seat 11 is in sliding fit with a support rod 8 to drive a butt plate 6 to move, when the area of the bottom end of the concrete is larger than the area of the top end of the object placing plate 5, at the moment, the butt strap 6 is just moved to be in alignment fit with the object placing plate 5, so that the bottom bearing area is synchronously adjusted according to the size and the shape of the concrete, and the moderate effect of the bottom area is ensured.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical scope of the present invention and the equivalent alternatives or modifications according to the technical solution and the inventive concept of the present invention within the technical scope of the present invention.
Claims (5)
1. Concrete shrinkage creep analytical equipment, including base (1), its characterized in that: the inner wall fixed mounting of base (1) has branch (2), the top fixed mounting of branch (2) has clamp plate (3), the top fixed mounting of base (1) has fore-set (4), the top fixed mounting of fore-set (4) has puts thing board (5), the inner wall top fixed mounting of fore-set (4) has telescopic link (7), the bottom fixed mounting of telescopic link (7) has linkage plate (12), the outer wall of linkage plate (12) and the inner wall sliding connection of fore-set (4), the equal fixed mounting in both sides has sliding seat (11) about linkage plate (12), the inner wall of fore-set (4) has been seted up and has been put thing groove (9), and the outer wall of sliding seat (11) and the inner wall sliding connection who puts thing groove (9), the inner wall fixed mounting who puts thing groove (9) has gag lever post (10), the outer wall of gag lever post (10) and the outer wall joint of sliding seat (11), the outer wall of the movable seat (11) is fixedly provided with a supporting rod (8), the top end of the supporting rod (8) is fixedly provided with a butt strap (6), the front face of the connecting plate (12) is fixedly provided with a connecting rod (13), the outer wall of the connecting rod (13) is in sliding connection with the inner wall of the top column (4), the outer wall of the connecting rod (13) is in sliding connection with the inner wall of the supporting rod (2), the outer wall of the supporting rod (2) is fixedly provided with a ring sleeve (14), the inner wall of the ring sleeve (14) is embedded with a convex seat (15), the inner wall of the convex seat (15) is movably connected with a hinged seat (23), and the outer wall of the hinged seat (23) is fixedly provided with a swing rod (16);
the utility model discloses a quick-witted, including connecting rod (13), the top fixed mounting of connecting rod (13) has ball (17), the outer wall movable fixed mounting of ball (17) has movable plate (18), the outer wall of movable plate (18) and the inner wall sliding connection of branch (2), the top joint of movable plate (18) has guide pulley (19), the outer wall of guide pulley (19) and the inner wall roll connection of branch (2), the equal fixed mounting in the left and right sides of movable plate (18) has negative pressure pole (20), the top fixed mounting of negative pressure pole (20) has stay cord (21), the outer wall swing joint of stay cord (21) has rope socket (22), the left side outer wall of rope socket (22) and the inner wall fixed mounting of branch (2).
2. The concrete shrinkage creep analysis apparatus according to claim 1, wherein: the inner wall of the butt strap (6) is movably connected with the outer wall of the storage plate (5), and the outer wall of the supporting rod (8) is slidably connected with the inner wall of the top column (4).
3. The concrete shrinkage creep analysis apparatus according to claim 1, wherein: the top of stay cord (21) and the outer wall fixed mounting of articulated seat (23), the inner wall fixed mounting of articulated seat (23) has the torsional spring, the quantity of pendulum rod (16) is two, and left side pendulum rod (16) are located the below of right side pendulum rod (16).
4. The concrete shrinkage creep analysis apparatus according to claim 1, wherein: the number of the support rods (8), the object placing grooves (9) and the limiting rods (10) is two, and the two support rods (8), the object placing grooves (9) and the limiting rods (10) are evenly distributed by taking the vertical center line of the top column (4) as the center.
5. A method for analyzing shrinkage and creep of concrete, characterized by using the apparatus for analyzing shrinkage and creep of concrete according to claim 1, comprising the steps of:
s1, placing the formed concrete on the top end of the object placing plate (5), wherein the outer wall of the concrete at the initial stage is in contact with the swing rod (16), and the swing rod (16) is pressed to rotate under the assistance of the hinge seat (23);
s2, bending the torsion spring along with the rotation of the hinge seat (23), further winding the pull rope (21) under the assistance of the rope seat (22), and driving the negative pressure rod (20) to move due to the fact that the pull rope (21) is pulled to gradually retract;
s3, the movement of the negative pressure rod (20) is matched with the moving plate (18) to drive the round ball (17) to slide, and the movement of the round ball (17) is matched with the connecting rod (13) to drive the connecting plate (12) to slide along the inner wall of the top column (4);
s4, when sliding, the connecting plate (12) not only extrudes the telescopic rod (7) to retract, but also drives the movable seat (11) to slide along the inner wall of the object placing groove (9) under the limit of the limiting rod (10);
s5, the movable seat (11) moves to drive the supporting rod (8) to move upwards, and the supporting rod (8) moves upwards to drive the butt strap (6) to slide along the outer wall of the object placing plate (5);
s6, when the bottom end area of the concrete is larger than the top end area of the object placing plate (5), the attachment plate (6) is just moved to be matched with the object placing plate (5) in an alignment mode, and finally the bottom end area is guaranteed to be moderate.
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| CN202110509750.1A CN113237753B (en) | 2021-05-11 | 2021-05-11 | Concrete shrinkage creep analysis device and method thereof |
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| CN202110509750.1A CN113237753B (en) | 2021-05-11 | 2021-05-11 | Concrete shrinkage creep analysis device and method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2000180323A (en) * | 1998-12-10 | 2000-06-30 | Ohbayashi Corp | Constant-load giving apparatus |
| CN103837413B (en) * | 2014-03-07 | 2017-01-25 | 中南大学 | Concrete tensile creep testing device and concrete shrinkage stress creep testing method |
| CN106950356B (en) * | 2017-03-02 | 2019-05-21 | 北京市第三建筑工程有限公司 | Suitable for concrete shrinkage and creep analytical equipment and its method |
| CN107822307A (en) * | 2017-05-19 | 2018-03-23 | 浙江帝恒实业有限公司 | A kind of deformable desk |
| CN108896406A (en) * | 2018-09-25 | 2018-11-27 | 贵州顺康路桥咨询有限公司 | A kind of concrete crushing strength and shrinkage and creep testing equipment |
| CN110101227B (en) * | 2019-06-02 | 2023-12-15 | 南京林业大学 | Size-adjustable folding table capable of being additionally arranged on suitcase |
| CN111189704B (en) * | 2020-01-14 | 2022-08-09 | 长安大学 | Concrete tension and compression dual-power creep test device and test method |
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