CN214011250U

CN214011250U - Recycled concrete contractility testing arrangement

Info

Publication number: CN214011250U
Application number: CN202023106732.9U
Authority: CN
Inventors: 王文
Original assignee: Dongguan Jianye Concrete Co ltd
Current assignee: Dongguan Jianye Concrete Co ltd
Priority date: 2020-12-19
Filing date: 2020-12-19
Publication date: 2021-08-20
Anticipated expiration: 2030-12-19

Abstract

The utility model relates to a recycled concrete tests technical field, and more specifically says, it relates to a recycled concrete contractility testing arrangement, and its technical scheme main points are: including the workstation, first fixed block and second fixed block, the setting is slided to the second fixed block, the workstation is provided with first slide rail, second slide rail and third slide rail, distance between first slide rail and the second slide rail is less than the distance between third slide rail and the second slide rail, first slide rail, second slide rail and third slide rail slide respectively and are provided with first slider, second slider and third slider, the second slider rotates and is connected with the pendulum rod, and the pendulum rod articulates respectively in first slider and third slider, first adjustment tank and the second adjustment tank that supplies first slider and third slider to articulate respectively and slide are seted up to the pendulum rod, first slider is connected with the second fixed block, the utility model discloses a recycled concrete shrinkage testing arrangement is convenient for observe the shrinkage value of the shrinkage change of recycled concrete piece in order to reachd recycled concrete.

Description

Recycled concrete contractility testing arrangement

Technical Field

The utility model belongs to the technical field of recycled concrete test technique and specifically relates to a recycled concrete contractility testing arrangement.

Background

The regenerated concrete is prepared by crushing, cleaning and grading waste concrete blocks, mixing the crushed, cleaned and graded waste concrete blocks with a grading agent according to a certain proportion, partially or completely replacing natural aggregates such as sand stones and the like, and adding cement, water and the like. The recycled concrete can be combined into aggregates in the following cases: all aggregates are regenerated aggregates; the coarse aggregate is regenerated aggregate, and the fine aggregate is natural sand; the coarse aggregate is natural gravel or cobble, and the fine aggregate is regenerated aggregate; the reclaimed aggregate replaces part of the coarse aggregate or the fine aggregate.

After the recycled concrete is made, a shrinkage test is required. The prior Chinese patent with the publication number of CN209311374U discloses a recycled concrete contractility testing device, which comprises a workbench, a guide rail plate welded at the center of the top of the workbench, a graduated scale embedded on the front surface of the guide rail plate, a first electric heating plate embedded at the center of the top of the guide rail plate, the testing device adopts a slide rail type measuring structure, can clamp the recycled concrete block between a first fixed block and a second fixed block which are in a C-shaped structure, and heating to appointed temperature, the reading of scale pointer contrast scale on alright observation second fixed block, will regenerate concrete again and cool to room temperature, and the recycled concrete just can contract, just can drive the second fixed block and pass through the horizontal slip in the spout that the gyro wheel was seted up on the guide rail board, and the reading of scale pointer contrast scale on alright second fixed block is observed again to accomplish the contractility test to the recycled concrete.

In view of the above-mentioned related art, the inventors have considered that, since the shrinkage range of the recycled concrete block is generally small, there is a drawback that it is difficult to observe only by observing the change in the distance between the first fixed block and the second fixed block to obtain the shrinkage value of the recycled concrete.

SUMMERY OF THE UTILITY MODEL

In order to facilitate the observation of the shrinkage change of the recycled concrete block so as to obtain the shrinkage value of the recycled concrete, the application provides a recycled concrete shrinkage testing device.

The application provides a recycled concrete contractility testing arrangement adopts following technical scheme:

a recycled concrete contractility testing device comprises a workbench, a first fixed block and a second fixed block, the first fixed block and the second fixed block are arranged at intervals along the length direction of the workbench, the second fixed block is arranged along the length direction of the workbench in a sliding way, the side wall of the long edge at one side of the workbench is provided with a first slide rail, a second slide rail and a third slide rail, the length directions of the first slide rail, the second slide rail and the third slide rail are all parallel to the length direction of the workbench, the distance between the first slide rail and the second slide rail is smaller than the distance between the third slide rail and the second slide rail, a first sliding block is arranged in the first sliding rail in a sliding manner along the length direction of the first sliding rail, a second sliding block is arranged in the second sliding rail in a sliding manner along the length direction of the second sliding rail, and a third sliding block is arranged in the third sliding rail in a sliding manner along the length direction of the third sliding rail;

the second sliding block is connected with a screw rod structure, the second sliding block is rotatably connected with a swing rod, the swing rod is respectively hinged to the first sliding block and the third sliding block, and the swing rod is provided with a first adjusting groove and a second adjusting groove which are respectively used for the first sliding block and the third sliding block to be hinged and slide;

the first sliding block is connected with the second fixing block, and the first sliding block and the third sliding block respectively indicate a first scale and a second scale.

By adopting the technical scheme, the recycled concrete block is clamped between the first fixing block and the second fixing block, the initial length value of the recycled concrete is read out from the first graduated scale, in the test, when the recycled concrete shrinks, the second fixing block drives the first sliding block to slide, the first sliding block drives the third sliding block to slide through the oscillating bar, the sliding distance of the third sliding block is smaller than the sliding distance between the third sliding rail and the second sliding rail because the distance between the first sliding rail and the second sliding rail is smaller than the sliding distance of the first sliding block, the sliding distance of the third sliding block is smaller than the sliding distance of the first sliding block, at the moment, the shrinking range of the recycled concrete is easy to observe by reading the numerical value change of the second graduated scale, and the shrinking value of the recycled concrete is easy to obtain by combining the proportion of the second graduated scale and the first graduated scale.

Preferably, the lead screw structure includes first mounting panel, second mounting panel, screw rod and spiral shell piece, first mounting panel with the second mounting panel sets up along the sliding direction interval of second slider, the screw rod rotate connect in first mounting panel with between the second mounting panel, the spiral shell piece slide set up in the second slide rail just the spiral shell piece with screw rod threaded connection, the spiral shell piece still with the second slider is connected.

Through adopting above-mentioned technical scheme, the spiral shell piece can carry on spacingly to the second slider in the test procedure to, when the position of second slider needs to be adjusted, through rotating the screw rod, just can control the spiral shell piece and slide, thereby control the second slider and slide, with the position of adjustment second slider.

Preferably, the second fixed block with first slider detachably connects, the second fixed block is provided with first connecting block, first connecting block threaded connection has first screw, first screw threaded connection simultaneously in first connecting block with first slider, the confession has been seted up to first slide rail the first groove of stepping down that first screw slided.

Through adopting above-mentioned technical scheme for the second fixed block with first slider detachably connects, thereby is convenient for carry out the dismouting to second fixed block and first slider.

Preferably, the spiral shell piece the second slider with detachably connects between the pendulum rod, the one end of spiral shell piece is provided with the second connecting block, the second connecting block stretches into in the second slide rail, the confession has been seted up to the second slide rail the second groove of stepping down that the second connecting block slided, second connecting block threaded connection has the second screw, the confession has been seted up to the second slider the perforation that the second screw passed, the second screw can pass in proper order the pendulum rod with screw connection in the second connecting block behind the second slider.

Through adopting above-mentioned technical scheme for detachably is connected between spiral shell piece, second slider and the pendulum rod, thereby is convenient for carry out the dismouting to spiral shell piece, second slider and pendulum rod.

Preferably, one end of the screw rod is connected with a screwing block.

Through adopting above-mentioned technical scheme, the setting of twisting the piece is convenient for people to twist and moves the screw rod to be convenient for people to adjust the position of second slider.

Preferably, the top of the workbench is provided with a dovetail groove along the length direction, the bottom of the second fixed block is provided with a dovetail block, and the dovetail block is arranged in the dovetail groove in a sliding manner.

Through adopting above-mentioned technical scheme, the second fixed block slides through sliding between dovetail and the dovetail and sets up in the top of workstation, and is spacing each other between dovetail and the dovetail, improves the stability of sliding of second fixed block.

Preferably, the first fixed block with respectively vertical sliding sets up first clamp splice and second clamp splice in the second fixed block, first clamp splice is provided with and passes the first control lever at first fixed block top, the second clamp splice is provided with and passes the second control lever at second fixed block top, first clamp splice with be connected with first spring between the top of first fixed block, the second clamp splice with be connected with the second spring between the second fixed block.

Through adopting above-mentioned technical scheme, when the recycled concrete piece was located between first fixed block and the second fixed block, it is tight with the stable clamp of recycled concrete piece through first clamp splice and second clamp splice.

Preferably, one end of the first control rod, which is far away from the first clamping block, and one end of the second control rod, which is far away from the second clamping block, are both connected with shifting blocks.

Through adopting above-mentioned technical scheme, the setting of shifting block is convenient for people to control first control lever and second control lever to be convenient for people to control the clamp of first clamp splice and second clamp splice to the recycled concrete piece.

In summary, the present application includes at least one of the following beneficial technical effects:

1. in the test, when the recycled concrete shrinks, the second fixed block drives the first slide block to slide, the first slide block drives the third slide block to slide through the swing rod, and the distance between the first slide rail and the second slide rail is smaller than the distance between the third slide rail and the second slide rail, so that the sliding distance of the third slide block is the sliding distance of the first slide block, at the moment, the shrinkage range of the recycled concrete is easy to observe by reading the numerical value change of the second scale, and the shrinkage value of the recycled concrete is easy to obtain by combining the proportion of the second scale and the first scale;

2. the screw block can limit the second sliding block in the testing process, and when the position of the second sliding block needs to be adjusted, the screw block can be controlled to slide by rotating the screw rod, so that the second sliding block is controlled to slide, and the position of the second sliding block is adjusted;

3. the second fixed block slides and sets up in the top of workstation through sliding between dovetail and the dovetail, and is spacing each other between dovetail and the dovetail, improves the stability of sliding of second fixed block.

Drawings

FIG. 1 is a schematic overall view of a recycled concrete shrinkage test apparatus according to an embodiment of the present application;

FIG. 2 is a sectional view of the first fixing block and the second fixing block in the embodiment of the present application;

FIG. 3 is an enlarged view of a portion of FIG. 1 at A;

fig. 4 is a structural section view among the first slide rail, the second slide rail, the third slide rail and the swing link in the embodiment of the present application.

Description of reference numerals: 1. a work table; 21. a first fixed block; 211. a first clamping block; 212. a first control lever; 213. a first spring; 22. a second fixed block; 221. a second clamp block; 222. a second control lever; 223. a second spring; 23. shifting blocks; 31. a dovetail groove; 32. a dovetail block; 41. a first slide rail; 411. a first slider; 412. a first chute; 42. a second slide rail; 421. a second slider; 43. a third slide rail; 431. a third slider; 51. a first connection block; 511. a first screw; 52. a second connecting block; 521. a second screw; 61. a first abdicating groove; 62. a second abdicating groove; 71. a first mounting plate; 72. a second mounting plate; 73. a screw; 74. a screw block; 8. a swing rod; 81. a first regulating groove; 82. a second regulating groove; 91. a first scale; 92. a second scale.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment of the application discloses recycled concrete contractility testing arrangement. Referring to fig. 1, the recycled concrete contractility testing device comprises a workbench 1, a first fixing block 21 and a second fixing block 22, wherein the workbench 1 is in a rectangular table shape, the first fixing block 21 and the second fixing block 22 are both in a C-shaped block shape, the first fixing block 21 and the second fixing block 22 are arranged at intervals along the length direction of the workbench 1, a C-shaped opening of the first fixing block 21 is opposite to a C-shaped opening of the second fixing block 22, and the C-shaped opening of the first fixing block 21 and the C-shaped opening of the second fixing block 22 are respectively used for placing two ends of a recycled concrete block.

Referring to fig. 1, the second fixing block 22 is slidably disposed along a longitudinal direction of the table 1. Specifically, two dovetail grooves 31 are formed in the top of the workbench 1 along the length direction of the workbench, and the two dovetail grooves 31 are spaced and parallel to each other. The bottom of the second fixed block 22 is provided with two dovetail blocks 32, the number of the dovetail blocks 32 corresponds to the number of the dovetail grooves 31, the two dovetail blocks 32 are respectively arranged in the two dovetail grooves 31 in a sliding manner, and the second fixed block 22 is arranged at the top of the workbench 1 in a sliding manner through the sliding between the dovetail blocks 32 and the dovetail grooves 31, so that the second fixed block 22 and the first fixed block 21 can be close to or far away from each other. In addition, the dovetail block 32 and the dovetail groove 31 are mutually limited, and the sliding stability of the second fixed block 22 is improved.

Referring to fig. 2, a first clamping block 211 and a second clamping block 221 are vertically slidably disposed in the C-shaped opening of the first fixing block 21 and the C-shaped opening of the second fixing block 22, and both the first clamping block 211 and the second clamping block 221 are rectangular blocks. Specifically, the upper end of the first clamping block 211 is provided with a first control rod 212 penetrating the top of the first fixing block 21, the second clamping block 221 is provided with a second control rod 222 penetrating the top of the second fixing block 22, the first control rod 212 and the second control rod 222 are both in the shape of a cylindrical rod, and the first clamping block 211 and the second clamping block 221 are vertically arranged on the first fixing block 21 and the second fixing block 22 through the first control rod 212 and the second control rod 222 in a sliding manner. A first spring 213 is connected between the top of the first clamping block 211 and the top of the C-shaped opening of the first fixing block 21, a second spring 223 is connected between the top of the second clamping block 221 and the top of the C-shaped opening of the second fixing block 22, and when two ends of the recycled concrete block are respectively located in the C-shaped opening of the first fixing block 21 and the C-shaped opening of the second fixing block 22, the first clamping block 211 and the second clamping block 221 stably clamp the recycled concrete block under the action of the first spring 213 and the second spring 223 respectively.

Further, referring to fig. 2, the end of the first control rod 212, which is far away from the first clamping block 211, and the end of the second control rod 222, which is far away from the second clamping block 221, are both connected with the shifting block 23, the shifting block 23 is in a round cake shape, and the setting of the shifting block 23 facilitates people to control the first control rod 212 and the second control rod 222, so that people can control the clamping of the first clamping block 211 and the second clamping block 221 on the recycled concrete block.

Referring to fig. 1, the long side wall of one side of the workbench 1 is provided with a first slide rail 41, a second slide rail 42 and a third slide rail 43, the first slide rail 41, the second slide rail 42 and the third slide rail 43 are all in a rectangular strip shape, the length directions of the first slide rail 41, the second slide rail 42 and the third slide rail 43 are all parallel to the length direction of the workbench 1, the first slide rail 41, the second slide rail 42 and the third slide rail 43 are arranged at intervals from top to bottom, wherein the distance between the first slide rail 41 and the second slide rail 42 is smaller than the distance between the third slide rail 43 and the second slide rail 42.

Referring to fig. 3 and 4, a first sliding block 411 is slidably disposed in the first sliding rail 41 along the length direction thereof, specifically, a first sliding groove 412 is disposed on a surface of the first sliding rail 41 facing away from the working table 1 along the length direction of the first sliding rail 41, the first sliding groove 412 is a rectangular groove, the first sliding block 411 is slidably disposed in the first sliding groove 412, the diameter of the first sliding block 411 is equal to the width of the first sliding groove 412, and when the first sliding block 411 slidably moves in the first sliding groove 412, the circumferential side wall of the first sliding block 411 is in contact with the long-side inner walls of two sides of the first sliding groove 412 respectively.

Referring to fig. 3 and 4, a second slider 421 is slidably disposed in the second slide rail 42 along the length direction thereof, a third slider 431 is slidably disposed in the third slide rail 43 along the length direction thereof, the structure between the second slider 421 and the second slide rail 42 is identical to the structure between the first slider 411 and the first slide rail 41, and the structure between the third slider 431 and the third slide rail 43 is identical to the structure between the first slider 411 and the first slide rail 41.

Referring to fig. 3 and 4, the first slider 411 is detachably connected to the second fixed block 22, and specifically, a first connection block 51 is fixedly disposed at a C-shaped end of the second fixed block 22, the first connection block 51 is rectangular, and the first connection block 51 is horizontally disposed. The top threaded connection of first connecting block 51 has first screw 511, and first screw 511 vertically runs through first connecting block 51, and when first slider 411 is connected with second fixed block 22, first screw 511 threaded connection is in first connecting block 51 and first slider 411 simultaneously for second fixed block 22 and first slider 411 detachably be connected, thereby be convenient for carry out the dismouting to second fixed block 22 and first slider 411. In addition, a first yielding groove 61 is formed in the top of the first slide rail 41, the first yielding groove 61 is a rectangular groove, the length direction of the first yielding groove 61 is parallel to the length direction of the first slide rail 41, and when the first screw 511 is simultaneously in threaded connection with the first connecting block 51 and the first slide block 411, the first yielding groove 61 is used for the first screw 511 to slide.

Referring to fig. 1 and 3, a screw rod structure is arranged below the second slide rail 42, specifically, the screw rod structure includes a first mounting plate 71, a second mounting plate 72, a screw rod 73 and a screw block 74, the first mounting plate 71 and the second mounting plate 72 are both rectangular plate-shaped, the first mounting plate 71 and the second mounting plate 72 are both fixedly arranged on a long side wall of one side of the workbench 1, the first mounting plate 71, the second mounting plate 72 and the second slide rail 42 are located on the same side wall of the workbench 1, the first mounting plate 71 and the second mounting plate 72 are both located below the second slide rail 42, and the first mounting plate 71 and the second mounting plate 72 are arranged at intervals along the sliding direction of the second slide block 421. The screw 73 is rotatably connected between the first mounting plate 71 and the second mounting plate 72 such that the axis of the screw 73 is parallel to the horizontal direction. The screw 74 is slidably disposed at the bottom of the second slide rail 42, and the screw 74 is in threaded connection with the screw 73, so that when the screw 73 rotates, the screw 74 moves along the length direction of the second slide rail 42.

Referring to fig. 3 and 4, the second sliding block 421 is connected to the screw block 74, while the second sliding block 421 is rotatably connected to the swing rod 8, and the screw block 74, the second sliding block 421 and the swing rod 8 are detachably connected to each other. Specifically, the upper end of the screw block 74 is fixedly provided with a second connecting block 52, the second connecting block 52 extends into the second slide rail 42, the bottom of the second slide rail 42 is provided with a second yielding groove 62 for the second connecting block 52 to slide, and when the screw block 74 slides along the length direction of the second slide rail 42 at the bottom of the second slide rail 42, the second connecting block 52 also slides along the length direction of the second slide rail 42 in the second slide rail 42. Further, one end of the second connecting block 52, which is away from the workbench 1, is connected with a second screw 521 through a thread, the second slider 421 is provided with a through hole for the second screw 521 to pass through, and the second screw 521 is connected to the second connecting block 52 through a screw after sequentially passing through the swing rod 8 and the second slider 421, so that the screw 74, the second slider 421 and the swing rod 8 are detachably connected, and the screw 74, the second slider 421 and the swing rod 8 are conveniently disassembled and assembled. The screw block 74 can limit the position of the second sliding block 421 in the testing process, and when the position of the second sliding block 421 needs to be adjusted, the screw block 74 can be controlled to slide by rotating the screw rod 73, so that the second sliding block 421 is controlled to slide, and the position of the second sliding block 421 is adjusted. One end of the screw rod 73 is connected with a screwing block, and the screw rod 73 can be conveniently screwed by people due to the screwing block, so that the position of the second sliding block 421 can be conveniently adjusted by people.

Referring to fig. 3 and 4, the swing rod 8 is respectively hinged to the first slider 411 and the third slider 431, the swing rod 8 is provided with a first adjusting groove 81 and a second adjusting groove 82 for the first slider 411 and the third slider 431 to hinge and slide, the length directions of the first adjusting groove 81 and the second adjusting groove 82 are both parallel to the length direction of the swing rod 8, and the first slider 411 and the third slider 431 are respectively provided with a first scale 91 and a second scale 92.

The implementation principle of a recycled concrete contractility testing arrangement of this application embodiment is: the recycled concrete block is clamped between the first fixing block 21 and the second fixing block 22, the initial length value of the recycled concrete is read from the first graduated scale 91, in the test, when the recycled concrete shrinks, the second fixing block 22 drives the first sliding block 411 to slide, the first sliding block 411 drives the third sliding block 431 to slide through the swing rod 8, the sliding distance of the third sliding block 431 is smaller than the distance between the third sliding rail 43 and the second sliding rail 42 because the distance between the first sliding rail 41 and the second sliding rail 42 is smaller than the distance between the third sliding rail 43 and the second sliding rail 42, the sliding distance of the first sliding block 411 is the same as the sliding distance of the third sliding block 431, the shrinking range of the recycled concrete is easy to observe by reading the numerical value change of the second graduated scale 92, and the proportion of the second graduated scale 92 and the first graduated scale 91 is combined, and the shrinking value of the recycled concrete is easy to obtain.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a recycled concrete contractility testing arrangement, includes workstation (1), first fixed block (21) and second fixed block (22), first fixed block (21) with second fixed block (22) are followed the length direction interval setting of workstation (1), second fixed block (22) are followed the length direction setting of sliding of workstation (1), its characterized in that: a first slide rail (41), a second slide rail (42) and a third slide rail (43) are arranged on the side wall of the long edge at one side of the workbench (1), the length directions of the first slide rail (41), the second slide rail (42) and the third slide rail (43) are all parallel to the length direction of the workbench (1), the distance between the first slide rail (41) and the second slide rail (42) is smaller than the distance between the third slide rail (43) and the second slide rail (42), a first slide block (411) is arranged in the first slide rail (41) in a sliding manner along the length direction of the first slide rail, a second slide block (421) is arranged in the second slide rail (42) in a sliding manner along the length direction of the second slide rail, and a third slide block (431) is arranged in the third slide rail (43) in a sliding manner along the length direction of the third slide rail;

the second sliding block (421) is connected with a screw rod structure, the second sliding block (421) is rotatably connected with a swing rod (8), the swing rod (8) is respectively hinged to the first sliding block (411) and the third sliding block (431), and the swing rod (8) is provided with a first adjusting groove (81) and a second adjusting groove (82) which are respectively used for the first sliding block (411) and the third sliding block (431) to be hinged and slide;

the first sliding block (411) is connected with the second fixed block (22), and the first sliding block (411) and the third sliding block (431) are respectively provided with a first scale (91) and a second scale (92).

2. The recycled concrete contractility testing apparatus according to claim 1, wherein: the lead screw structure includes first mounting panel (71), second mounting panel (72), screw rod (73) and spiral shell piece (74), first mounting panel (71) with second mounting panel (72) set up along the glide direction interval of second slider (421), screw rod (73) rotate connect in first mounting panel (71) with between second mounting panel (72), spiral shell piece (74) slide set up in second slide rail (42) just spiral shell piece (74) with screw rod (73) threaded connection, spiral shell piece (74) still with second slider (421) are connected.

3. The recycled concrete contractility testing apparatus according to claim 2, wherein: second fixed block (22) with first slider (411) detachably connects, second fixed block (22) are provided with first connecting block (51), first connecting block (51) threaded connection has first screw (511), but first screw (511) threaded connection simultaneously in first connecting block (51) with first slider (411), confession has been seted up in first slide rail (41) first groove (61) of stepping down that first screw (511) slided.

4. The recycled concrete contractility testing apparatus according to claim 3, wherein: the utility model discloses a bolt, including the pendulum rod (8), screw block (74), second slider (421) and detachably connect between pendulum rod (8), the one end of screw block (74) is provided with second connecting block (52), second connecting block (52) stretch into in second slide rail (42), confession is seted up in second slide rail (42) the second groove of stepping down (62) that the second connecting block (52) slided, second connecting block (52) threaded connection has second screw (521), confession is seted up in second slider (421) the perforation that second screw (521) passed, second screw (521) can pass in proper order pendulum rod (8) with screw connection in second connecting block (52) behind second slider (421).

5. The recycled concrete contractility testing apparatus according to claim 4, wherein: one end of the screw rod (73) is connected with a twisting block.

6. The recycled concrete contractility testing apparatus according to claim 5, wherein: the top of workstation (1) has seted up dovetail (31) along its length direction, the bottom of second fixed block (22) is provided with dovetail (32), dovetail (32) slide set up in dovetail (31).

7. The recycled concrete contractility testing apparatus according to claim 6, wherein: first fixed block (21) with vertical slip respectively in second fixed block (22) sets up first clamp splice (211) and second clamp splice (221), first clamp splice (211) are provided with and pass first control lever (212) at first fixed block (21) top, second clamp splice (221) are provided with and pass second control lever (222) at second fixed block (22) top, first clamp splice (211) with be connected with first spring (213) between the top of first fixed block (21), second clamp splice (221) with be connected with second spring (223) between second fixed block (22).

8. The recycled concrete contractility testing apparatus according to claim 7, wherein: one end of the first control rod (212) far away from the first clamping block (211) and one end of the second control rod (222) far away from the second clamping block (221) are both connected with a shifting block (23).