CN109540708A - A kind of test method of simulation concrete under load and environmental factor coupling - Google Patents
A kind of test method of simulation concrete under load and environmental factor coupling Download PDFInfo
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- CN109540708A CN109540708A CN201811273375.XA CN201811273375A CN109540708A CN 109540708 A CN109540708 A CN 109540708A CN 201811273375 A CN201811273375 A CN 201811273375A CN 109540708 A CN109540708 A CN 109540708A
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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
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
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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
- G01N3/04—Chucks
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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
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0032—Generation of the force using mechanical means
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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
- G01N2203/0058—Kind of property studied
- G01N2203/006—Crack, flaws, fracture or rupture
- G01N2203/0062—Crack or flaws
- G01N2203/0064—Initiation of crack
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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
- G01N2203/0058—Kind of property studied
- G01N2203/006—Crack, flaws, fracture or rupture
- G01N2203/0062—Crack or flaws
- G01N2203/0066—Propagation of crack
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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
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0222—Temperature
- G01N2203/0228—Low temperature; Cooling means
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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
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0236—Other environments
- G01N2203/024—Corrosive
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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
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/04—Chucks, fixtures, jaws, holders or anvils
- G01N2203/0423—Chucks, fixtures, jaws, holders or anvils using screws
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Abstract
The present invention relates to a kind of test method of concrete test technical field more particularly to simulation concrete under load and environmental factor coupling.Step 1: pressure testing is carried out using 15% stress level to concrete sample, it is ensured that press machine working condition is normal, and press machine upper and lower surface is fitted closely with concrete sample；Step 2: after uniform load to set stress level, 120s, rear uniformly unloading are kept；And so on after 5 times, corrosion Frozen-thawed cycled m time is then carried out, a load is constituted and corrodes Frozen-thawed cycled；Step 3: compression strength loss rate is calculated after carrying out n times load corrosion Frozen-thawed cycled.Such method has certain accuracy by experiment, experimental data, and reliability is easy to operate, and control precisely, without augmentor under special production complex environment, and only need to repeat to load, existing equipment can be completed under general environment using press machine.
Description
Technical field
The present invention relates to concrete test technical fields more particularly to a kind of simulation concrete in load and environmental factor coupling
Cooperate the test method under.
Background technique
The destruction for building object concrete is largely since load and carbonization, freeze thawing, corrosion coupling cause.Currently, mixed
Xtah Crude Clay structure endurance issues are increasingly valued by people, Related Experimental Study also gradually from single-element in view of mostly because
Plain coupling.Due to the creeping property of experimental situation, corrosivity and Stress relaxation, to the loaded ribbon of nowadays concrete sample
Carry out many difficulties, and concrete is in load and environmental factor coupling, merely mostly in actual working condition
Consider that the influence of environmental factor can not simulate the working condition of concrete material under complex environment.From high-performance concrete material
Preparation angle is set out, and the research of the endurance performance of concrete under the various factors coupling effect participated in load is current necessarily to become
Gesture.
Concrete just has a large amount of hole and micro-crack as a kind of fragile material before bearing load inside it, these
Initial imperfection largely all concentrates on coarse aggregate surface.Until ultimate load, the expansion of inside concrete crackle after starting stress
Opening up and increasing can be divided into that the relatively stable period (stress level is in 0.3-0.5) in crack, stable crack period of expansion, (stress level existed
0.5-0.75), unstable crack progressing phase (stress level is greater than 0.75) three phases.When the stress level of concrete is greater than
When 0.4, concrete is mainly based on plastic deformation.So in test block after load-unloading, the major part of inside concrete
Micro-crack and hole will be retained, the hole regarded as under actual loading that the pore structure inside test block still can be rough
Structure.
At present both at home and abroad, find had in the durable Journal of Sex Research of load and regeneration concrete under environmental factor coupling
The microcosmic mechanism that certain research achievement, load and environment coupled action influence endurance quality is mainly shown as: regeneration is mixed
The Micro-architecture deterioration that solidifying soil generates under Repeated Loading may accelerated corrosion, freeze-thaw damage on the other hand corrode freeze thawing
The non-homogeneous deterioration generated also results in the stresses re-distribution of loading procedure and Micro-architecture deterioration path changes.Of the invention this
Kind test method can reflect influencing each other for both damages as far as possible.The required testing equipment of the present invention is relatively simple, has very
Good accuracy and higher feasibility, and it is easy to operate.
Summary of the invention
It it is an object of the invention to overcome the deficiencies in the prior art, adapts to reality and needs, a kind of simulation concrete is provided and is existed
Test method under load and environmental factor coupling.
In order to achieve the object of the present invention, the technical solution adopted by the present invention are as follows: a kind of simulation concrete is in load and ring
Test method under the factor coupling of border, it is characterised in that: by changing reloading and corrosion Frozen-thawed cycled alternate frequency
Come the real work state of simulation concrete, specific steps are as follows:
Step 1: pressure testing being carried out using 15% stress level to concrete sample, it is ensured that press machine working condition is normal,
And press machine upper and lower surface is fitted closely with concrete sample；
Step 2: after uniform load to set stress level, 120s, rear uniformly unloading are kept；And so on 5 times
Afterwards, corrosion Frozen-thawed cycled m times is then carried out, a load corrosion Frozen-thawed cycled is constituted；
Step 3: compression strength loss rate is calculated after carrying out n times load corrosion Frozen-thawed cycled.
The step 2 m value is 10, and the general value of step 3 n is 5.
Speed is carried by liter and is set to 300N/s, and the dead load time is set to 120s, and discharge rate is set to 300N/s.
Set stress level is 20%-60%.
Corrosion Frozen-thawed cycled freezes 4h or more according to slow method standard of freezing in -19 DEG C, then is drawn off being put under room temperature and contain
Expire and melts 4h or more in the sodium sulphate, sodium chloride, magnesium chloride composite compaction technique of 10% concentration.
Firstly, carrying out pressure testing using 15% stress level to concrete sample, it is ensured that press machine working condition is normal, and
Press machine upper and lower surface is fitted closely with concrete sample；Then after uniform load to set stress level, 120s is kept,
Uniformly unloading afterwards；And so on after 5 times, corrosion Frozen-thawed cycled 10 times is then carried out, constitutes a load corrosion Frozen-thawed cycled；Most
Afterwards, compression strength loss rate is calculated after carrying out 5 subordinate loads corrosion Frozen-thawed cycled；
The present invention applies reloading and durability test using to regeneration concrete test specimen as a preferred technical solution,
Alternately the Protonation constant of 5 progress is tested come the endurance quality realized under load and complex environment coupling, is had good
Accuracy and higher feasibility, and it is easy to operate.
This Protonation constant as a preferred technical solution, without augmentor under special production complex environment, and only needs
It repeats to load using press machine under general environment；
The development in concrete compression and crack has the relationship of essence as a preferred technical solution, and whole process has two
A turning point, one be 30% ultimate load when, this is that Interface Crack starts to extend, one be 70% ultimate load when, interface
Crack starts to penetrate through.Set stress level is 20%-60% in the present invention；
Every group of test specimen first carries out pressure testing with the load of 15% bursting stress level as a preferred technical solution, it is ensured that pressure
Power machine works normally and is bonded test specimen with press machine upper and lower surface, avoids the occurrence of stress concentration phenomenon；
The experimental method uses control variate method as a preferred technical solution, prepares multiple and different test specimen groups, can be into one
Step probes into following problems: (1) in a load corrosion Frozen-thawed cycled, repeating loading-unloading number to the shadow of concrete durability
It rings；(2) feasibility that verifying reloading corrosive cycle alternate frequency is 5 times；
Corrosion Frozen-thawed cycled freezes 4h or more according to slow method standard of freezing in -19 DEG C as a preferred technical solution, then will
It, which takes out, is put into the sodium sulphate for filling with 10% concentration under room temperature, sodium chloride, melts 4h or more in magnesium chloride composite compaction technique；
The validity of experimental data is with concrete by load and environmental factor coupling as a preferred technical solution,
Lower compression strength decline is no more than 25%, and it is standard that mass loss, which is no more than 5%,.
The beneficial effects of the present invention are:
Such method of one, has certain accuracy by experiment, experimental data, and reliability is easy to operate, control essence
Standard without augmentor under special production complex environment, and only need to repeat to load under general environment using press machine, existing to set
It is standby to can be completed；
Two, traditional loading device is cumbersome, complex procedures and there are concrete shrinkage and creeps and stress relaxation phenomenon, passes through
Tighten holding to carry and setting for bolt, stress apply uneven, the device being further applied load using jack, structure and installation equipment compared with
Workload can greatly be simplified using this method provided by the present invention for complexity；
Three, are that simulation regeneration concrete material is coupled in working condition by corrosion freeze thawing in the future by adjusting load mechanism
Endurance quality under effect is laid the groundwork；
The present invention can get a kind of test method of simulation concrete under load and environmental factor coupling.
Detailed description of the invention
The present invention is described further with case study on implementation with reference to the accompanying drawing.
Fig. 1 is experimentation schematic diagram of the present invention.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples:
Referring to Fig. 1.
The invention discloses a kind of test method of simulation concrete under load and environmental factor coupling, features
It is: by changing reloading and corrosion Frozen-thawed cycled alternate frequency come the real work state of simulation concrete, specific step
Suddenly are as follows:
Step 1: pressure testing being carried out using 15% stress level to concrete sample, it is ensured that press machine working condition is normal,
And press machine upper and lower surface is fitted closely with concrete sample；
Step 2: after uniform load to set stress level, 120s, rear uniformly unloading are kept；And so on 5 times
Afterwards, corrosion Frozen-thawed cycled m times is then carried out, a load corrosion Frozen-thawed cycled is constituted；
Step 3: compression strength loss rate is calculated after carrying out n times load corrosion Frozen-thawed cycled.
The step 2 m value is 10, and the general value of step 3 n is 5.
Speed is carried by liter and is set to 300N/s, and the dead load time is set to 120s, and discharge rate is set to 300N/s.
Set stress level is 20%-60%.
Corrosion Frozen-thawed cycled freezes 4h or more according to slow method standard of freezing in -19 DEG C, then is drawn off being put under room temperature and contain
Expire and melts 4h or more in the sodium sulphate, sodium chloride, magnesium chloride composite compaction technique of 10% concentration.
Specific embodiment 1: present embodiment provides a kind of durability for studying concrete under various factors coupling effect
Method；Further probe into influence of the reloading corrosion alternate freezing and thawing number to concrete durability；
Step 1: concrete macroscopic view tests test specimen production
The gradation according to following table, production multiple groups concrete macroscopic view test test specimen, every group three pieces, are put in 150mm × 150mm
In the mold of × 150mm, conserve 28 days；
Step 2: initial intensity test is conserved within test specimen 28 days:
Test specimen is taken out in fog room, carries out 28 days initial intensity tests, three pieces of test specimens is chosen and carries out pressure resistance
Degree test, is averaged and obtains initial maximum bursting stress, and compression strength measurement and stress loading use microcomputer-control full-automatic
Pressure testing machine, data are as shown in table 1；
1 concrete 28d of table conserves initial compression strength
Step 3: CYCLIC LOADING is carried out by set stress level
Two groups of test specimens, 20%, 40% stress level set before is subjected to initial loading, every group first uses 15%
Stress level load carry out pressure testing, it is ensured that press machine working condition is normal, and press machine upper and lower surface and concrete sample are tight
Closely connected conjunction, uniform load to target stress level continue 120 seconds, then are uniformly offloaded to unstress state, repeat loading-unloading 5
It is secondary；
Step 4: corrosion Frozen-thawed cycled
Test specimen is immersed in the sodium sulphate of 10% concentration, sodium chloride is impregnated in magnesium chloride composite compaction technique；It has impregnated
Cheng Hou dries weighing, is put into slow jelly testing machine, test specimen is put into etchant solution test specimen box and is freezed, reaches -19 DEG C about 2
Hour, then freeze 4 hours, then be drawn off at this temperature, be put in the sodium sulphate of 10% concentration, sodium chloride, magnesium chloride is compound
Melt 4 hours or more in 19-20 DEG C of salting liquid of bucket, once corroding Frozen-thawed cycled after thawing terminates；
Step 5: reloading and 10 times corrosion Frozen-thawed cycled alternately 5 times, corrosion Frozen-thawed cycled total degree are 50
It is secondary, as shown in Figure 1；
The compression strength under concrete load and environmental factor coupling is tested, data are as shown in table 2；
Alternately 5 times lower test specimen compression strength of 2 reloading of table and 10 corrosion Frozen-thawed cycleds
Experiment is compared, the feasibility of such Protonation constant is using a kind of load corrosion freeze thawing of fixture in the verifying present invention
Coupling device is further applied load using pressure testing machine, and nut and loading plate keep load to stablize, and combination is made not by environment about
Beam is capable of providing holding to carry and setting for more constant, lasting and accurate power.
Fixture load corrosion freeze thawing coupling device experimental data is as shown in table 3；
Test specimen compression strength under 3 fixture of table load corrosion unfreezing
Two kinds of load mechanism test specimen compression strength data and error amount are as shown in table 4:
4 two kinds of load mechanism compression strength numerical value comparisons of table
Has many advantages, such as coupling mechanism easy to operate, that control is accurate the invention proposes a kind of, without special system
Make augmentor under complex environment, and only need to repeat to load using press machine under general environment, existing equipment can be completed.With
Fixture load freeze thawing corrosion coupling mechanism compares, it will thus be seen that reloading and freeze thawing corrode replace 5 times and freeze thawing it is total
Number is 50 times, and experimental result is closer to fixture load mechanism result, and error amount is smaller, within engineering allowed band；
The above results show the feasibility of test method in the present invention, and experiment condition is more severe than fixture load freeze thawing corrosion coupling mechanism
It carves, it is as a result content to retain sovereignty over a part of the country complete, it is studied for endurance performance of concrete and detection provides important test method.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalents made by bright specification and accompanying drawing content are applied directly or indirectly in relevant technical field, are similarly included in
In scope of patent protection of the invention.
Claims (5)
1. a kind of test method of simulation concrete under load and environmental factor coupling, it is characterised in that: pass through change
Reloading and corrosion Frozen-thawed cycled alternate frequency come the real work state of simulation concrete, specific steps are as follows:
Step 1: pressure testing is carried out using 15% stress level to concrete sample, it is ensured that press machine working condition is normal, and presses
Power machine upper and lower surface is fitted closely with concrete sample；
Step 2: after uniform load to set stress level, 120s, rear uniformly unloading are kept；And so on after 5 times, connect
Carry out corrosion Frozen-thawed cycled m time, constitute load and corrode Frozen-thawed cycled；
Step 3: compression strength loss rate is calculated after carrying out n times load corrosion Frozen-thawed cycled.
2. according to a kind of test method of the simulation concrete described in claims 1 under load and environmental factor coupling,
It is characterized by: the step 2 m value is 10, the step 3 n value is 5.
3. according to a kind of test method of the simulation concrete described in claims 1 under load and environmental factor coupling,
It is characterized by: carrying speed for liter is set to 300N/s, the dead load time is set to 120s, and discharge rate is set to 300N/s.
4. according to a kind of test method of the simulation concrete described in claims 1 under load and environmental factor coupling,
It is characterized by: set stress level is 20%-60%.
5. according to a kind of test method of the simulation concrete described in claims 1 under load and environmental factor coupling,
It is characterized by: corrosion Frozen-thawed cycled freezes 4h or more according to slow method standard of freezing in -19 DEG C, then it is drawn off being put under room temperature
Fill with thawing 4h or more in the sodium sulphate, sodium chloride, magnesium chloride composite compaction technique of 10% concentration.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110954467A (en) * | 2019-11-01 | 2020-04-03 | 天津大学 | Simulation acceleration test method and device for aging of reinforced concrete test piece |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101275892A (en) * | 2008-03-04 | 2008-10-01 | 东南大学 | Concrete multi-factors durability experimental device under bent tension stress and environment coupled action |
| CN101576461A (en) * | 2009-05-22 | 2009-11-11 | 重庆交通大学 | Freeze-thaw stability testing method for bearing capacity of aggregate base |
| CN102778389A (en) * | 2012-06-29 | 2012-11-14 | 哈尔滨工程大学 | Concrete test loading device and test method under load and multifactor coupling |
| US8747549B1 (en) * | 2010-07-01 | 2014-06-10 | Calstar Products, Inc. | Fly ash-based cementitious mixture |
| CN106841577A (en) * | 2017-04-12 | 2017-06-13 | 山东大学 | It is adaptable to concrete loading device and method under load environment coupling |
| CN107543755A (en) * | 2017-08-03 | 2018-01-05 | 中南大学 | Load couples down concrete durability experiment device and evaluation method with Frozen-thawed cycled |
-
2018
- 2018-10-30 CN CN201811273375.XA patent/CN109540708A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101275892A (en) * | 2008-03-04 | 2008-10-01 | 东南大学 | Concrete multi-factors durability experimental device under bent tension stress and environment coupled action |
| CN101576461A (en) * | 2009-05-22 | 2009-11-11 | 重庆交通大学 | Freeze-thaw stability testing method for bearing capacity of aggregate base |
| US8747549B1 (en) * | 2010-07-01 | 2014-06-10 | Calstar Products, Inc. | Fly ash-based cementitious mixture |
| CN102778389A (en) * | 2012-06-29 | 2012-11-14 | 哈尔滨工程大学 | Concrete test loading device and test method under load and multifactor coupling |
| CN106841577A (en) * | 2017-04-12 | 2017-06-13 | 山东大学 | It is adaptable to concrete loading device and method under load environment coupling |
| CN107543755A (en) * | 2017-08-03 | 2018-01-05 | 中南大学 | Load couples down concrete durability experiment device and evaluation method with Frozen-thawed cycled |
Non-Patent Citations (2)
| Title |
|---|
| 王振杰等: "《建筑工程检测试验人员手册》", 31 October 1999, 太原：山西科学技术出版社 * |
| 雷斌等: ""荷载与腐蚀冻融耦合作用下再生混凝土耐久性能试验"", 《农业工程学报》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110954467A (en) * | 2019-11-01 | 2020-04-03 | 天津大学 | Simulation acceleration test method and device for aging of reinforced concrete test piece |
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Application publication date: 20190329 |