CN103674725A - Concrete splitting strength test device and concrete splitting strength test method in ultra-low-temperature environment - Google Patents
Concrete splitting strength test device and concrete splitting strength test method in ultra-low-temperature environment Download PDFInfo
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- CN103674725A CN103674725A CN201310673956.3A CN201310673956A CN103674725A CN 103674725 A CN103674725 A CN 103674725A CN 201310673956 A CN201310673956 A CN 201310673956A CN 103674725 A CN103674725 A CN 103674725A
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Abstract
The invention discloses a concrete splitting strength test device and a concrete splitting strength test method in an ultra-low-temperature environment. The device comprises a universal testing machine and a low-temperature box arranged between an upper pressure plate and a lower pressure plate of the universal testing machine, wherein holes used for the passing of an upper force transfer rod and a lower force transfer rod are formed in the surfaces of the low-temperature box; one end of the upper force transfer rod is connected with the upper pressure plate of the universal testing machine; the other end of the upper force transfer rod is connected with an upper pressure bearing disk which is clamped above a concrete sample; an upper gasket is connected between the upper pressure bearing disk and the concrete sample; one end of the lower force transfer rod is connected with the lower pressure plate of the universal testing machine; the other end of the lower force transfer rod is connected with a lower pressure bearing disk which is clamped below the concrete sample; a lower gasket is connected between the lower pressure bearing disk and the concrete sample; the upper pressure bearing disk, the upper gasket and the lower gasket are connected through two positioning rods. The device disclosed by the invention is high in integrity, simple in structure and convenient to disassemble; the test method is simple and is easy to operate and implement; the efficiency is guaranteed and the test accuracy is also guaranteed. The device and the method can be widely applied to the concrete splitting strength test in the ultra-low-temperature environment.
Description
Technical field
The present invention relates to a kind of device and test method of concrete splitting strength test.
Background technology
As one of most important clean energy resource, liquefied natural gas (LNG) LNG starts extensively to utilize in countries in the world, because LNG condensing temperature is-165
oc, makes its condition of storage very harsh, and at present, the terminal tower that stores LNG mainly be take the synergetic structure of internal steel sealant outer steel reinforced concrete protective layer as main, therefore, to concrete used, mechanical property research of ultra-low temperature surroundings, is necessary.
At present, Chinese scholars is in to low temperature or the test of ultra-low temperature surroundings concrete mechanics, mainly contain two kinds of modes: 1. cooling by concrete sample being placed in to low temperature insulation can or refrigerator, after test specimen temperature is consistent with box house temperature, fast its taking-up is carried out to intensity test, but this method is due to when test, test specimen has been departed to low temperature environment, enter normal temperature condition and test, this there will be the situation of temperature distributing disproportionation, and experimental result is also inaccurate; 2. test specimen is placed in to self-control ultralow temperature control box and carries out concrete crushing strength test, this method can guarantee that concrete is always under target temperature in process of the test.
But above method is the compressive strength under ultralow temperature for concrete only, owing to there is limitation in current existing test method and device itself, make also not propose effective scheme on concrete low temperature cleavage strength test method design, guarantee the precision of test and the accuracy of data.
Summary of the invention
The device and the test method that the object of this invention is to provide concrete splitting strength test under a kind of ultra-low temperature surroundings, solve the technical matters of concrete splitting strength test accuracy; And solution realizes process of the test problem simple and easy to operate.
For achieving the above object, the present invention adopts following technical scheme:
The device of concrete splitting strength test under a kind of ultra-low temperature surroundings, comprise universal testing machine, and being placed in the top board of universal testing machine and the cryogenic box between lower platen, the upper surface of described cryogenic box has a hole passing for upper transmission rod, lower surface correspondence position to have a hole passing for lower transmission rod.
One end of described upper transmission rod is connected with the top board of universal testing machine, the other end is connected with the upper bearing disc that is clamped in concrete test block top, between described upper bearing disc and concrete test block, is connected with Upper gasket.
One end of described lower transmission rod is connected with the lower platen of universal testing machine, the other end is connected with the lower bearing disc that is clamped in concrete test block below, between described lower bearing disc and concrete test block, is lined with lower gasket.
Described upper bearing disc, Upper gasket and lower gasket three are connected by two backstays.
Described upper transmission rod is connected with top board Tenon, and one of them has tenon, another has with it the tongue-and-groove coordinating.
Described upper transmission rod is threaded with upper bearing disc, and the termination of wherein going up transmission rod is with externally threaded threaded connector, and upper bearing disc has the upper screw coordinating with threaded connector.
Described upper bearing disc is connected with positioning threads, and wherein one end of backstay is to be smooth shaft with externally threaded thread head, remainder, has one group of lower screw coordinating with backstay on upper bearing disc.
Described Upper gasket is that flat of rectangle, two ends have the Upper gasket through hole that the thread head for backstay passes, and the surface of contact of Upper gasket and concrete test block is arcwall face.
Described lower gasket is flat of rectangle, be parallel to each other with Upper gasket, in the same size, the lower gasket through hole that two ends have is corresponding with Upper gasket, pass for the shaft of backstay, the surface of contact of lower gasket and concrete test block is arcwall face.
The diameter of the thread head of described backstay is less than the diameter of Upper gasket through hole, the diameter of the shaft of backstay be greater than Upper gasket through hole diameter, be less than the diameter of lower gasket through hole.
On described lower bearing disc, be useful on the stopper slot that lower transmission rod inserts.
A concrete splitting test method of applying the device of concrete splitting strength test under described ultra-low temperature surroundings, concrete steps are as follows:
Step 3 passes with lower transmission rod upper transmission rod, is fixedly connected with lower platen with the top board of universal testing machine respectively from the hole of cryogenic box.
Step 4, puts into concrete test block between Upper gasket and lower gasket.
Step 5 is put into filler strip between pad and concrete test block, adjusts the position of the upper and lower pressing plate of omnipotent mechanical test machine, and concrete test block is clamped.
Step 7, after temperature stabilization to be tested, starts universal testing machine, carries out concrete splitting test, until concrete test block destruction, the concrete splitting intensity data under accurate recording low temperature environment.
Compared with prior art the present invention has following characteristics and beneficial effect:
The present invention has realized concrete cleavage strength under low temperature and ultra-low temperature surroundings has been tested, and can guarantee test accuracy and data accuracy, has solved and under condition of ultralow temperature, has carried out the technical matters of concrete splitting test.
The present invention is directed to concrete splitting and test special research and design, can realize the experimental enviroment that normal temperature arrives-196 ℃, wherein normal temperature is generally the temperature range of 15 ℃ to 25 ℃, and simple in structure, intensity is large, the load that can bear 2000KN: mainly comprise transmission rod, bearing disc, pad and four parts of backstay, wherein transmission rod is used for connecting the universal testing machine of cryogenic box outside, to guarantee in whole process of the test, concrete test block all, in cryogenic box, is guaranteed the accuracy of test, upper bearing disc and upper transmission rod are together by a threaded connection that strength of joint is good, axle center can not be offset, and avoid occurring in process of the test inconsistent phenomenon, equally, between upper transmission rod and top board, like that your Tenon is connected, the stopper slot design on lower bearing disc be also for guarantee and lower transmission rod between can not be subjected to displacement, also have the effect of location simultaneously, the design of backstay is in convenience, lower gasket location, consistent to guarantee both axis parallels, the axis of corresponding concrete test block, guaranteed test degree of accuracy, and be flexibly connected between backstay and lower gasket, only locate the position relationship of lower gasket and Upper gasket, and do not play the transmission of power, can not produce extra power to lower gasket, just can not press down and in process, play the effect of keeping out at top board, can not affect process of the test, this installs good integrity, simple in structure, easily processing, for convenience detach, can reuse, function that can failure test machine itself, connection when needing, while not needing, just can dismantle as required, test method is simple, easily operation realizes, guaranteed efficiency, the accurate data result of the diametral compression test of the concrete test block under test for low temperature environment again.
The present invention can be widely used in concrete splitting strength test under ultra-low temperature surroundings.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention will be further described in detail.
Fig. 1 is structural representation of the present invention.
Fig. 2 is the structural representation of upper transmission rod of the present invention.
Fig. 3 is the cross-sectional view of upper bearing disc of the present invention.
Fig. 4 is the plan structure schematic diagram of upper bearing disc of the present invention.
Fig. 5 is the structural representation of facing upward of upper bearing disc of the present invention.
Fig. 6 is the main TV structure schematic diagram of Upper gasket of the present invention.
Fig. 7 is the structural representation of looking up of Upper gasket of the present invention.
Fig. 8 is the side-looking structural representation of Upper gasket of the present invention.
Fig. 9 is the cross-sectional view of lower bearing disc of the present invention.
Figure 10 is the structural representation of facing upward of lower bearing disc of the present invention.
Figure 11 is the structural representation of lower transmission rod of the present invention.
Figure 12 is the structural representation of backstay of the present invention.
Reference numeral: bearing disc, 7.1-stopper slot, 8-Upper gasket, 8.1-screw, 9-lower gasket, 9.1-through hole, 10-backstay under screw, 7-under transmission rod, the upper bearing disc of 6-, the upper screw of 6.1-, 6.2-under 1-concrete test block, 2-universal testing machine, 2.1-top board, 2.2-lower platen, 3-cryogenic box, the upper transmission rod of 4-, 5-.
Embodiment
Embodiment is shown in Figure 1,
the device of concrete splitting strength test under a kind of ultra-low temperature surroundings, comprise universal testing machine 2, and being placed in the top board 2.1 of universal testing machine 2 and the cryogenic box 3 between lower platen 2.2, the upper surface of described cryogenic box 3 has hole, a lower surface correspondence position passing for upper power transmission 4 bars to have a hole passing for lower transmission rod 5; One end of described upper transmission rod 4 is connected with the top board 2.1 of universal testing machine 2, the other end is connected with the upper bearing disc 6 that is clamped in concrete test block 1 top, between described upper bearing disc 6 and concrete test block 1, is connected with Upper gasket 8; One end of described lower transmission rod 5 is connected with the lower platen 2.2 of universal testing machine 2, the other end is connected with the lower bearing disc 7 that is clamped in concrete test block 1 below, between described lower bearing disc 7 and concrete test block 1, is lined with lower gasket 9; Described upper bearing disc 6, Upper gasket 8 and lower gasket 9 threes are connected by two backstays 10.
Shown in Figure 2, described upper transmission rod 4 is connected with top board 2.1 Tenons, one of them has tenon, another has with it the tongue-and-groove coordinating, and described upper transmission rod 4 is threaded with upper bearing disc 6, and the termination of wherein going up transmission rod 4 is with externally threaded threaded connector 4.2.
Shown in Fig. 3, Fig. 4, Fig. 5, described upper bearing disc 6 has upper screw 6.1 and the one group of lower screw 6.2 coordinating with backstay 10 coordinating with threaded connector 4.2.
Shown in Fig. 9, Figure 10, Figure 11, on described lower bearing disc 7, be useful on the stopper slot 7.1 that lower transmission rod 5 inserts.
Shown in Fig. 6, Fig. 7, Fig. 8, described Upper gasket 8 has the Upper gasket through hole 8.1 that the thread head 10.1 for backstay 10 passes for flat of rectangle, two ends, and Upper gasket 8 is arcwall face with the surface of contact of concrete test block 1.
Described lower gasket 9 is the same with Upper gasket 8 structures, be all flat of rectangle, and be parallel to each other with Upper gasket 8, in the same size, the lower gasket through hole 9.1 that two ends have is corresponding with Upper gasket 8, pass for the shaft 10.2 of backstay 10, lower gasket 9 is arcwall face with the surface of contact of concrete test block 1.
Shown in Figure 12, one end of described backstay 10 is to be smooth shaft 10.2 with externally threaded thread head 10.1, remainder, the thread head 10.1 of backstay 10 is threaded togather Upper gasket 8 and upper bearing disc 6, the end of shaft 10.2 is through the lower gasket through hole 9.1 on lower gasket 9, the diameter of the thread head 10.1 of described backstay 10 is less than the diameter of Upper gasket through hole 8.1, and the diameter of the shaft 10.2 of backstay 10 is greater than the diameter of Upper gasket through hole 8.1, is less than the diameter of lower gasket through hole 9.1.
A concrete splitting test method of applying the device of concrete splitting strength test under described ultra-low temperature surroundings, concrete steps are as follows:
Step 3, upper transmission rod 4 is passed from the hole of cryogenic box 3 with lower transmission rod 5, is fixedly connected with lower platen 2.2 with the top board 2.1 of universal testing machine 2 respectively, wherein go up the tongue-and-groove that the tenon 4.1 on transmission rod 4 is aimed on top board 2.1, both Tenons connect; Lower transmission rod 5 is placed on lower platen 2.2, and the hole that is cryogenic box due to lower transmission rod 5 is limited, and between the following transmission rod 5 of institute and lower platen 2.2, there will not be relative displacement.
Step 4, puts into concrete test block 1 between Upper gasket 8 and lower gasket 9, because the relative position of concrete test block 1 has been located, now only need to have been regulated to Upper gasket 8 one lower gaskets 9 mutually by backstay, guarantees three's center line unanimously.
Step 5, between upper and lower pad and concrete test block 1, put into filler strip, adjust the relative position of the upper and lower pressing plate of omnipotent mechanical test machine 2, by transmission rod, pressing plate applied pressure is passed to bearing disc, passing to pad, filler strip, until concrete test block is clamped between two filler strips.
Step 7, after temperature stabilization to be tested, start universal testing machine 2, carry out concrete splitting test, top board 2.1 starts to press down, by upper transmission rod 4, upper bearing disc 6, Upper gasket 8 and filler strip, successively power is transmitted, until concrete test block 1 destruction, the concrete splitting intensity data under accurate recording low temperature environment.
In addition, if need to carry out the test of normal temperature concrete anti-compression, directly whole mechanism is removed together with insulation can, can recover the original function of universal testing machine, if need to carry out the concrete anti-compression test under low temperature, just can only upper and lower pad be removed, directly concrete test block is placed between upper and lower bearing disc, can carry out the compression test of the concrete test block under low temperature.
Claims (9)
1. the device of concrete splitting strength test under a ultra-low temperature surroundings, comprise universal testing machine (2), and be placed in the top board (2.1) of universal testing machine (2) and the cryogenic box (3) between lower platen (2.2), it is characterized in that: the upper surface of described cryogenic box (3) has hole, a lower surface correspondence position passing for upper power transmission (4) bar to have a hole passing for lower transmission rod (5);
One end of described upper transmission rod (4) is connected with the top board (2.1) of universal testing machine (2), the other end is connected with the upper bearing disc (6) that is clamped in concrete test block (1) top, between described upper bearing disc (6) and concrete test block (1), is connected with Upper gasket (8);
One end of described lower transmission rod (5) is connected with the lower platen (2.2) of universal testing machine (2), the other end is connected with the lower bearing disc (7) that is clamped in concrete test block (1) below, between described lower bearing disc (7) and concrete test block (1), is lined with lower gasket (9);
Described upper bearing disc (6), Upper gasket (8) and lower gasket (9) three are connected by two backstays (10).
2. the device of concrete splitting strength test under ultra-low temperature surroundings according to claim 1, is characterized in that: described upper transmission rod (4) is connected with top board (2.1) Tenon, and one of them has tenon, another has the tongue-and-groove coordinating with it.
3. the device of concrete splitting strength test under ultra-low temperature surroundings according to claim 2, it is characterized in that: described upper transmission rod (4) is threaded with upper bearing disc (6), the termination of wherein going up transmission rod (4) is with externally threaded threaded connector (4.2), and upper bearing disc (6) has the upper screw (6.1) coordinating with threaded connector (4.2).
4. the device of concrete splitting strength test under ultra-low temperature surroundings according to claim 3, it is characterized in that: described upper bearing disc (6) is threaded with backstay (10), wherein one end of backstay (10) is to be smooth shaft (10.2) with externally threaded thread head (10.1), remainder, has one group of lower screw (6.2) coordinating with backstay (10) on upper bearing disc (6).
5. the device of concrete splitting strength test under ultra-low temperature surroundings according to claim 4, it is characterized in that: described Upper gasket (8) is that flat of rectangle, two ends have the Upper gasket through hole (8.1) passing for the thread head of backstay (10) (10.1), and Upper gasket (8) is arcwall face with the surface of contact of concrete test block (1).
6. the device of concrete splitting strength test under ultra-low temperature surroundings according to claim 5, it is characterized in that: described lower gasket (9) for flat of rectangle, with Upper gasket (8) be parallel to each other, in the same size, the lower gasket through hole (9.1) that two ends have is corresponding with Upper gasket (8), pass for the shaft (10.2) of backstay (10), lower gasket (9) is arcwall face with the surface of contact of concrete test block (1).
7. the device of concrete splitting strength test under ultra-low temperature surroundings according to claim 6, it is characterized in that: the diameter of the thread head (10.1) of described backstay (10) is less than the diameter of Upper gasket through hole (8.1), the diameter of the shaft (10.2) of backstay (10) is greater than the diameter of Upper gasket through hole (8.1), is less than the diameter of lower gasket through hole (9.1).
8. the device of concrete splitting strength test under ultra-low temperature surroundings according to claim 7, is characterized in that: on described lower bearing disc (7), be useful on the stopper slot (7.1) that lower transmission rod (5) inserts.
9. application rights requires a concrete splitting test method for the device of concrete splitting strength test under the described ultra-low temperature surroundings of one of 1-8, it is characterized in that, concrete steps are as follows:
Step 1, before carrying out the diametral compression test of concrete test block (1), upper transmission rod (4), upper bearing disc (6), Upper gasket (8), lower gasket (9), backstay (10), lower bearing disc (7) and lower transmission rod (5) are assembled into an integrated model;
Step 2, puts into cryogenic box (3) by the integrated model assembling;
Step 3 passes with lower transmission rod (5) upper transmission rod (4), is fixedly connected with lower platen (2.2) with the top board (2.1) of universal testing machine (2) respectively from the hole of cryogenic box (3);
Step 4, puts into concrete test block (1) between Upper gasket (8) and lower gasket (9);
Step 5 is put into filler strip between pad and concrete test block, adjusts the position of the upper and lower pressing plate of omnipotent mechanical test machine (2), and concrete test block is clamped;
Step 6, covers cryogenic box case lid, starts cryogenic box, at normal temperature, arrives-190 ℃ of range regulation test temperatures;
Step 7, after temperature stabilization to be tested, starts universal testing machine (2), carries out concrete splitting test, until concrete test block (1) destruction, the concrete splitting intensity data under accurate recording low temperature environment.
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| CN201310673956.3A CN103674725B (en) | 2013-12-12 | 2013-12-12 | The device of concrete splitting strength test and test method under a kind of ultra-low temperature surroundings |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104034746A (en) * | 2014-05-28 | 2014-09-10 | 中国建筑股份有限公司 | Low-temperature and ultralow-temperature thermal deformation transient type test device and method for concrete |
| CN105203381A (en) * | 2015-09-25 | 2015-12-30 | 中国石油大学(北京) | Low-temperature cooling pressure applying device |
| CN105403467A (en) * | 2015-12-21 | 2016-03-16 | 郑州大学 | Concrete material high temperature splitting testing machine, and high temperature splitting testing method |
| CN107870119A (en) * | 2016-09-23 | 2018-04-03 | 河北新丰工程检测有限公司 | For adjusting the device of concrete test block compression strength center |
| CN109470578A (en) * | 2018-12-28 | 2019-03-15 | 内蒙古工业大学 | A kind of regulation low temperature environment testing apparatus and test method |
| CN110044705A (en) * | 2019-05-14 | 2019-07-23 | 北京市建设工程质量第二检测所有限公司 | A kind of concrete anti-compression method for testing performance based on construction |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104034746A (en) * | 2014-05-28 | 2014-09-10 | 中国建筑股份有限公司 | Low-temperature and ultralow-temperature thermal deformation transient type test device and method for concrete |
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| CN109470578A (en) * | 2018-12-28 | 2019-03-15 | 内蒙古工业大学 | A kind of regulation low temperature environment testing apparatus and test method |
| CN109470578B (en) * | 2018-12-28 | 2024-02-27 | 内蒙古工业大学 | Test device and test method for regulating low-temperature environment |
| CN110044705A (en) * | 2019-05-14 | 2019-07-23 | 北京市建设工程质量第二检测所有限公司 | A kind of concrete anti-compression method for testing performance based on construction |
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Granted publication date: 20160907 Termination date: 20201212 |