CN104483204A - Device for concrete compressive creep test in high-temperature environment - Google Patents
Device for concrete compressive creep test in high-temperature environment Download PDFInfo
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- CN104483204A CN104483204A CN201410587434.6A CN201410587434A CN104483204A CN 104483204 A CN104483204 A CN 104483204A CN 201410587434 A CN201410587434 A CN 201410587434A CN 104483204 A CN104483204 A CN 104483204A
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- baking oven
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Abstract
The invention relates to a device for a concrete compressive creep test in a high-temperature environment. The device comprises a traditional creep test device, marble cushion blocks, an upper cover, a baking oven housing, a baking oven heating device, a lower cover, a cover opening hole and a footstand. The baking oven heating device has a cylindrical structure. The middle of the cylindrical structure is provided with a through hole. The through hole structure matches with a concrete test piece. The concrete test piece is placed at the through hole. The top of the baking oven heating device is provided with the upper cover. The bottom of the baking oven heating device is provided with a lower cover. The upper cover and the lower cover produce sealing effects. One of the marble cushion blocks goes through the upper cover and is located between a large cushion plate and an upper pressing plate. The other one of the marble cushion blocks goes through the lower cover and is located between a cushion plate and a force sensor. The device can realize a concrete compressive creep test in a high-temperature environment in the fields of civil engineering, hydraulic engineering and mine engineering. The device is obtained by device addition and reconstruction of the existing compressive creep tester, has a low cost and is convenient for operation.
Description
Technical field
The invention belongs to concrete shop experiment technical field, be specifically related to the concrete compression creep test device under a kind of hot environment.
Background technology
Creep be concrete under long-term stress effect, its strain characteristic of sustainable growth in time.Concrete creeping can alleviate the shrinkage temperature stress of early-age concrete, also may cause the long-term loss of prestress of structural concrete.Estimate the time deformation of structural concrete accurately, have important academic significance and engineer applied to be worth.
At present, the test unit of creeping for measuring concrete compression both at home and abroad all carries out as under normal temperature, or in Short-Term High Temperature condition, there is no the concrete compression creep test device under long term high temperature environmental baseline.Under some special concrete structure is then positioned at the hot test environment of 80 ~ 300 DEG C for a long time, such as, deposits the nuclear vessel structure of nuke rubbish etc., be positioned at the underground concrete structure etc. of geothermal environment.(at higher temperature, generation is decomposed destruction by concrete, the possibility not having long term creep strain to test and necessity), concrete long term high temperature was crept to the permanance important of structure.
Concrete creep system holds G system and deformation measurement system forms by adding, and loading system is divided into three kinds of methods such as lever, spring and hydraulic servo type, wherein common with spring.If be a difficult problem to concrete compression creep test device fit on hot environment.First, concrete creep device itself is comparatively huge, and may carry out the manual operation such as repeated loading or unloading to concrete in process of the test.How to complete stress in high temperature environments to apply, and warranty test personnel safety in high temperature environments, be first difficult point.Secondly, during concrete creep, concrete is axially subject larger compressive stress.How under carrying out high pressure, high temperature environment, to carry out isothermal holding at concrete axial, be also difficult point.Because common organic insulation material will burn at 300 DEG C, serviceability of scattering and disappearing; The flexible materials such as rock wool will produce large volume deformation under high pressure effect, also lose commercial performance; And although metal material can bear pressure, do not possess heat preservation property.Again, the deformation measurement system of most of concrete creep can only work at normal temperatures and pressures.
Therefore, study and a kind ofly can carry out the target that test unit that concrete compression creeps has become the numerous researchist in this area in high temperature environments.
Summary of the invention
The object of the present invention is to provide the concrete compression creep test device under a kind of hot environment, creeping test for the concrete compression under high temperature, is a kind of measuring technology for laboratory.
Concrete compression creep test device under the hot environment that the present invention proposes, by traditional creep test device, and marble cushion block 13, upper cover 14, baking oven shell 15, baking oven firing equipment 16, lower cover 17, uncap hole 18 and runners 19 forms, described traditional creep test device is by actuator 1, ball fall 2, concrete sample 3, force snesor 4, disk spring 5, reaction plate 6, top board 7, screw rod 8, lower platen 9, base plate 10 and backing plate 11 form, reaction plate 6, top board 7, lower platen 9 and base plate 10 connect to form framed structure by two montants, described actuator 1 is between reaction plate 6 and top board 7, described concrete sample 3 is between top board 7 and lower platen 9, concrete sample 3 top is connected top board 7 by ball fall 2 with backing plate, bottom is connected lower platen 9 by force snesor 4 with backing plate, some disk springs 5 are provided with between lower platen 9 and base plate 10, baking oven firing equipment 16 is in column structure, cylindricality through hole is provided with in the middle part of it, structure and the concrete sample 3 of described through hole match, described concrete sample 3 is positioned over described through hole position, baking oven firing equipment 16 top is provided with upper cover 14, bottom is provided with lower cover 17, seal, block of marble cushion block 13 is through upper cover 14, described marble cushion block 13 is between switch base plate 11 and top board 7, another block of marble cushion block 13 is through lower cover 17 simultaneously, and described marble cushion block 13 is between backing plate and force snesor 4.
Ultimate principle of the present invention: by being similar to the test unit of baking oven, is only placed in hot environment prismatic or columniform concrete sample.The creep test devices such as such energy-storaging spring, force snesor, reaction plate are all placed in normal temperature environment, be beneficial to testing crew and carry out the operation of loading unloader test, most equipment also can be operated in normal temperature environment, and only providing hot environment to concrete sample, minimized like this heating space is also conducive to economize energy.
The upper and lower covers part of structure that difficult point is " baking oven ".This part material at high temperature must ensure heat-insulating property, also will transmit the elevated pressures from reaction plate and spring simultaneously.The thinking provided of this method is by " lid " perforate up and down, and offer the square hole (100*100m) suitable with concrete sample xsect or circular hole (φ 100), placing with depth of section at tapping is the marble block of 50mm.Marble block one end props up concrete sample, and one end is connected with reaction plate by ball fall, serves transmission xial feed, and keeps the effect of oven interior temperature.
The reason of employing marble block is: 1, marmorean compressive strength is at more than 50MPa, and the stress level that concrete compression is crept is up to 40%, suppose the super high strength concrete pressurized creep test carrying out C100, its axial force is 40MPa, also can meet the demands.2, marmorean decomposition temperature is close to 900 DEG C, and the high temperature far above 300 DEG C is crept environment temperature.3, marmorean coefficient of heat conductivity is only 2W/m.K, far below metal materials such as austenitic alloys, can provide good heat-insulating property.
Present invention preserves conventional springs formula Creep Apparatus and the conventional concrete creep test function such as load test specimen and maintenance, displacement and force data monitoring is provided.Adopt baking oven firing equipment to provide hot environment to concrete sample, upper and lower covers and marble cushion block etc. solve the transmission of test specimen axial force under high temperature simultaneously, and the function such as the maintenance of hot environment.
Beneficial effect of the present invention is:
The high temperature that the invention solves pressurized creep test environment keeps the problem with axially heavily stressed transmission, is that under hot environment, concrete pressurized is crept the effective ways of test.
The present invention can at engineering fields such as civil engineering work, hydraulic engineering, mine engineering, nuclear power engineerings, the concrete compression be carried out under hot environment (100 ~ 300 DEG C) is crept test (note: will decline to a great extent higher than concrete strength when 300 DEG C, does not carry out possibility and the necessity of creep test).The present invention can carry out equipment and install additional and transformation on existing common pressurized creeps tester, and cost is low, easy to operate, is a kind of novel reliable high temperature concrete creep test device.
Accompanying drawing explanation
Fig. 1 is conventional springs formula creep test device;
Fig. 2 is hot test baking oven of the present invention and pad device sectional view;
Fig. 3 is hot test baking oven of the present invention and pad device vertical view;
Fig. 4 is structural representation of the present invention.
Number in the figure: 1. actuator, 2. ball fall, 3. concrete sample, 4. force snesor, 5. disk spring, 6. reaction plate, 7. top board, 8. screw rod, 9. lower platen, 10. base plate, 11. backing plates, 12. nuts, 13 is marble cushion block, and 14 is upper cover, and 15 is baking oven shell, 16 is baking oven firing equipment, and 17 is lower cover, and 18 is hole of uncapping.
Embodiment
The present invention is further illustrated by reference to the accompanying drawings below by embodiment.
Embodiment 1:
As shown in figs 2-4, by traditional creep test device, and marble cushion block 13, upper cover 14, baking oven shell 15, baking oven firing equipment 16, lower cover 17, uncap hole 18 and runners 19 form the structure of described device.The structure of described traditional creep test device as shown in Figure 1, by actuator 1, ball fall 2, concrete sample 3, force snesor 4, disk spring 5, reaction plate 6, top board 7, screw rod 8, lower platen 9, base plate 10, backing plate 11 and nut 12 form, described baking oven firing equipment is column construction, by baking oven shell 15, upper cover 14 and lower cover 17 form, baking oven shell 15 top is sealed by upper cover 14, bottom is sealed by lower cover 17, upper cover 14 and lower cover 17 have the through hole matched with marble cushion block 13 structure, two pieces of marble cushion blocks 13 are loaded on the through hole position of upper cover and lower cover 17 respectively, the concrete sample 3 baking oven firing equipment 16 being enclosed within traditional creep test device is outside.On concrete sample 3 top, be placed between backing plate 11 and top board 7 with marble cushion block 13, in concrete sample 3 bottom, be also placed between backing plate 11 and force snesor 4 with marble cushion block 13, and by runners 18, this device be placed on lower shoe 9.
The course of work of the present invention is as follows:
Backing plate 11 and marble cushion block 13 are placed on force snesor 4 successively, load baking oven shell 15, and adjust the position of runners 18, make marble cushion block (under) 13 through lower through-hole 18, half height is positioned at baking oven, and half height is positioned at outside baking oven.Concrete sample 3 is put into baking oven, is placed on marble cushion block 13.By marble cushion block (on) 13 and ball fall 2 be placed in successively on concrete sample, cover upper cover 14, make marble cushion block (on) 13 through upper through hole.Adjusting nut 12, can start creep test.
Claims (1)
1. the concrete compression creep test device under hot environment, by traditional creep test device, and marble cushion block (13), upper cover (14), baking oven shell (15), baking oven firing equipment (16), lower cover (17), uncap hole (18) and runners (19) composition, described traditional creep test device is by actuator (1), ball fall (2), concrete sample (3), force snesor (4), disk spring (5), reaction plate (6), top board (7), screw rod (8), lower platen (9), base plate (10) and backing plate (11) composition, reaction plate (6), top board (7), lower platen (9) and base plate (10) connect to form framed structure by two montants, described actuator (1) is positioned between reaction plate (6) and top board (7), described concrete sample (3) is positioned between top board (7) and lower platen (9), concrete sample (3) top is connected top board (7) by ball fall (2) with backing plate, bottom is connected lower platen (9) by force snesor (4) with backing plate, be provided with some disk springs (5) between lower platen (9) and base plate (10), it is characterized in that baking oven firing equipment (16) is in column structure, cylindricality through hole is provided with in the middle part of it, the structure of described through hole and concrete sample (3) match, described concrete sample (3) is positioned over described through hole position, baking oven firing equipment (16) top is provided with upper cover (14), bottom is provided with lower cover (17), seal, block of marble cushion block (13) is through upper cover (14), described marble cushion block (13) is positioned between switch base plate (11) and top board (7), another block of marble cushion block (13) is through lower cover (17) simultaneously, described marble cushion block (13) is positioned between backing plate and force snesor (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410587434.6A CN104483204A (en) | 2014-10-29 | 2014-10-29 | Device for concrete compressive creep test in high-temperature environment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410587434.6A CN104483204A (en) | 2014-10-29 | 2014-10-29 | Device for concrete compressive creep test in high-temperature environment |
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| CN104483204A true CN104483204A (en) | 2015-04-01 |
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| CN201410587434.6A Pending CN104483204A (en) | 2014-10-29 | 2014-10-29 | Device for concrete compressive creep test in high-temperature environment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105510215A (en) * | 2015-12-31 | 2016-04-20 | 深圳市芭田生态工程股份有限公司 | Hardening testing equipment and hardening testing method |
| CN107270844A (en) * | 2017-06-12 | 2017-10-20 | 太原理工大学 | A kind of method of high performance concrete thermal strain under test high temperature |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0348745A (en) * | 1989-07-18 | 1991-03-01 | Shimizu Corp | Multipurpose testing device for concrete |
| CN102692349A (en) * | 2012-06-18 | 2012-09-26 | 重庆大学 | High-temperature local stability testing device for steel member |
-
2014
- 2014-10-29 CN CN201410587434.6A patent/CN104483204A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0348745A (en) * | 1989-07-18 | 1991-03-01 | Shimizu Corp | Multipurpose testing device for concrete |
| CN102692349A (en) * | 2012-06-18 | 2012-09-26 | 重庆大学 | High-temperature local stability testing device for steel member |
Non-Patent Citations (1)
| Title |
|---|
| 赵金辉: ""C60高性能混凝土徐变性能研究"", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105510215A (en) * | 2015-12-31 | 2016-04-20 | 深圳市芭田生态工程股份有限公司 | Hardening testing equipment and hardening testing method |
| CN107270844A (en) * | 2017-06-12 | 2017-10-20 | 太原理工大学 | A kind of method of high performance concrete thermal strain under test high temperature |
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Application publication date: 20150401 |