CN109991279A - A kind of Frozen-thawed cycled exposure test device and test method - Google Patents
A kind of Frozen-thawed cycled exposure test device and test method Download PDFInfo
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- CN109991279A CN109991279A CN201910416241.7A CN201910416241A CN109991279A CN 109991279 A CN109991279 A CN 109991279A CN 201910416241 A CN201910416241 A CN 201910416241A CN 109991279 A CN109991279 A CN 109991279A
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- 238000012360 testing method Methods 0.000 title claims abstract description 130
- 238000010998 test method Methods 0.000 title claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims abstract description 49
- 238000010257 thawing Methods 0.000 claims abstract description 41
- 238000009434 installation Methods 0.000 claims abstract description 22
- 238000007711 solidification Methods 0.000 claims abstract description 4
- 230000008023 solidification Effects 0.000 claims abstract description 4
- 238000004146 energy storage Methods 0.000 claims description 19
- 239000004567 concrete Substances 0.000 claims description 6
- 238000005485 electric heating Methods 0.000 claims description 6
- 239000004744 fabric Substances 0.000 claims description 4
- 235000015110 jellies Nutrition 0.000 claims description 4
- 239000008274 jelly Substances 0.000 claims description 4
- -1 felt Substances 0.000 claims description 2
- 239000002689 soil Substances 0.000 claims 1
- 230000008014 freezing Effects 0.000 description 5
- 238000007710 freezing Methods 0.000 description 5
- 125000004122 cyclic group Chemical group 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 241000208340 Araliaceae Species 0.000 description 2
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 2
- 235000003140 Panax quinquefolius Nutrition 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 239000004746 geotextile Substances 0.000 description 2
- 235000008434 ginseng Nutrition 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/72—Investigating presence of flaws
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
Abstract
The invention discloses a kind of Frozen-thawed cycled exposure test device and test methods, wherein, experimental rig includes the water-retaining type electric calorifie installation that can be wrapped in surface of test piece, and the power supply device being connected with the water-retaining type electric calorifie installation, and the water-retaining type electric calorifie installation includes waterproof heating wire and water retention carpet；Test method includes: step 1: being connected in the surface wrap water-retaining type electric calorifie installation of test specimen, and by the waterproof heating wire with power supply device, water retention carpet is bedewed, the test specimen is then placed on outdoor；Step 2: the test specimen is freezed by outdoor low temperature；Step 3: it when the solidification point of the test specimen reaches default frozen standard, opens the waterproof heating wire and thaws to the test specimen；Step 4: when the test specimen thaws to default defrosting standard, the waterproof heating wire is closed, the test specimen completes a wheel freeze thawing；Step 5: repeating step 2 to step 4, and test specimen enters new round freeze thawing, until reaching freezing-thawing cycles needed for test.
Description
Technical field
The present invention relates to civil engineering technical field of test equipment, in particular to a kind of Frozen-thawed cycled exposure test device and
Test method.
Background technique
Reinforced concrete structure is the most widely used engineering structure in current world wide, but long-term in northern area
The reinforced concrete structure of military service is typically due to Frozen-thawed cycled and causes durability damages, and then leads to a large amount of reinforced concreters
Journey structure reaches far away design service life and has just destroyed.It studies concrete structure durability caused by Frozen-thawed cycled and damages machine
Reason explores Frozen-thawed cycled control method and measure for improving concrete structure durability, extends concrete structure service life
It is of great significance.
Fast freeze-thaw cyclic test is by changing test specimen temperature quickly come temperature change in simulating natural environment.But actually
Various regions natural climate condition is totally different, and the change of test specimen temperature is excessively dull in indoor fast freeze-thaw test, can not reflect specifically
The temperature time variation feature in area；It is followed in addition, indoor freezing and thawing testing machine is only applicable to freeze thawing of the size compared with small specimen or test block mostly
Ring test, it is difficult to meet the freezing and thawing test demand of the larger test specimen of size.
Summary of the invention
It is an object of the invention to overcome the above-mentioned deficiency in the presence of the prior art, a kind of Frozen-thawed cycled exposure examination is provided
Experiment device and test method.
In order to achieve the above-mentioned object of the invention, the present invention provides following technical schemes:
A kind of Frozen-thawed cycled exposure test device, the water-retaining type electric calorifie installation including surface of test piece can be wrapped in, Yi Jiyu
The power supply device that the water-retaining type electric calorifie installation is connected, the water-retaining type electric calorifie installation include waterproof heating wire and water retention carpet.
The water retention carpet refers to that the good blanket works of water retention property, the waterproof heating wire refer to the electricity after water-proofing treatment
Heated filament, the waterproof heating wire can Direct Uniform be fixed on the water retention carpet.
The present invention is directly wrapped in surface of test piece by water-retaining type electric calorifie installation to thaw, and the water-retaining type electric heating fills
It sets and is made of waterproof heating wire and water retention carpet, abandoned the somewhat complex design of traditional freeze thawing experimental rig, structure is simple, cost pole
It is low, it is easy to operate.And waterproof heating wire and water retention carpet are applicable to sizes, while meeting large scale test specimen and small size examination
The demand of part Frozen-thawed cycled.
Further, Frozen-thawed cycled exposure test device of the present invention can be directly placed at outdoor, utilize nature ring
Temperature realization in border is freezed, and the problem of temperature is monotonically changed in indoor fast freeze-thaw cyclic test is avoided, and sufficiently reflects true
The time-varying effecting of environment temperature solves sample dimensions, shape and military service place limitation problem.
The present invention using water-retaining type electric calorifie installation overcome winter freeze, the natural environment of spring break constrain, solve freeze
Melt test specimen in circulation exposure test and be difficult to realize multiple defrosting problem under cryogenic, improves Frozen-thawed cycled exposure test
Freeze thawing efficiency.
Preferably, the water retention carpet includes the preferable blanket structure of the water-retaining propertys such as geotextiles, felt, concrete curing cloth
Object.
Preferably, the surface of test piece is disposed with multiple temperature sensors, and the temperature sensor is for measuring test specimen table
The temperature in face, in order to test specimen frozen state and thawed state judge.
Preferably, all temperature sensors are respectively connected with switch, and the switch is temperature detect switch (TDS), and the switch is used for
Control the opening and closing of the waterproof heating wire.
The present invention is matched using temperature sensor and temperature detect switch (TDS), the automatic open close of Lai Shixian waterproof heating wire, thus
Realize the automatic progress of Frozen-thawed cycled.When the temperature of all temperature sensors reaches default frozen standard, the temperature
Control switch automatically turns on, and the waterproof heating wire is powered and thaws to the test specimen；When all temperature sensors
When temperature reaches default defrosting standard, the temperature detect switch (TDS) is automatically closed, and the waterproof heating wire stops heating.It is described default
Frozen standard and default defrosting standard, are set according to test requirements document.
Preferably, the switch is temperature-time controller.When the temperature of all temperature sensors reaches default jelly
When knot standard and when the freeze-off time of the test specimen reaches minimum interval, the temperature-time controller is just opened automatically
It opens, the waterproof heating wire is powered and thaws to the test specimen.It is carried out by default frozen standard and minimum interval
Dual setting, to realize the state modulator to entire Frozen-thawed cycled.The minimum interval is set according to test requirements document.
Preferably, the switch is connected with counter, and Frozen-thawed cycled of every completion, counter records are primary, until reaching
To required freezing-thawing cycles.
Preferably, the power supply device includes energy storage equipment, and the solar battery being connected with the energy storage equipment
Plate.Preferably, the energy storage equipment is battery.The present invention realizes the defrosting of test specimen by photovoltaic electric heating, significantly
The power consumption of freezing and thawing test is saved.
The invention also discloses a kind of Frozen-thawed cycled exposure test methods, comprising the following steps:
Step 1: in the surface wrap water-retaining type electric calorifie installation of test specimen, and by the waterproof heating wire and power supply device phase
Connection, water retention carpet is bedewed, the test specimen is then placed on outdoor；
Step 2: the test specimen is freezed by outdoor low temperature；
Step 3: when the solidification point of the test specimen reaches default frozen standard, the waterproof heating wire is opened to institute
Test specimen is stated to thaw；
Step 4: when the test specimen thaws to default defrosting standard, the waterproof heating wire is closed, the test specimen is completed
One wheel freeze thawing；
Step 5: repeating step 2 to step 4, and the test specimen enters new round freeze thawing, until reaching jelly needed for test
Melt cycle-index.
Test method of the present invention freezes test specimen using natural conditions, sufficiently reflects true environment temperature
Time-varying effecting is spent, to improve the accuracy of test result, provides technology ginseng for the durable Journal of Sex Research of cold district engineering structure
It examines；Thawed using waterproof heating wire, overcome winter freeze, the natural environment of spring break constraint, increase freeze thawing and follow
The number of ring exposure test improves Frozen-thawed cycled efficiency.
Preferably, multiple temperature sensors are installed in the surface of test piece, all temperature sensors are connected with switch
It connects, the switch is temperature detect switch (TDS), and the switch is connected with the waterproof heating wire, in the step 3, when all described
When the temperature of temperature sensor reaches default frozen standard, the switch is automatically turned on, and the waterproof heating wire is powered and to institute
Test specimen is stated to thaw, in the step 4, when the temperature of all temperature sensors reaches default defrosting standard, institute
It states switch to be automatically closed, the waterproof heating wire stops heating.
Preferably, the switch is temperature-time controller.When the temperature of all temperature sensors reaches default jelly
When knot standard and when the freeze-off time of the test specimen reaches minimum interval, the temperature-time controller is just opened automatically
It opens, the waterproof heating wire is powered and thaws to the test specimen.Assuming that minimum interval is n, it is assumed that described in moment A
Switch automatically turns on for the first time, then at least to pass through time n, that is, at least will be in A+n moment, the switch ability second
Secondary automatic opening, the minimum interval reflect the freeze-off time of test specimen in the natural environment, and its purpose is to ensure
Test specimen fully charge, the minimum interval are set according to test requirements document.By between default frozen standard and minimum time
Every carrying out dual setting, to realize the state modulator to entire Frozen-thawed cycled.
Preferably, the power supply device includes energy storage equipment, and the solar battery being connected with the energy storage equipment
Plate, during outdoor is freezed, the solar panel converts solar energy into electrical energy test specimen described in the step 2
It is stored in battery, stored electric energy thaws to the test specimen for waterproof heating wire in the step 3.
Compared with prior art, experimental rig of the present invention the utility model has the advantages that
The present invention is directly wrapped in surface of test piece by water-retaining type electric calorifie installation to thaw, and the water-retaining type electric heating fills
It sets and is made of waterproof heating wire and water retention carpet, abandoned the somewhat complex design of traditional freeze thawing experimental rig, structure is simple, cost pole
It is low, it is easy to operate.And waterproof heating wire and water retention carpet are applicable to sizes, while meeting large scale test specimen and small size examination
The demand of part Frozen-thawed cycled.
Further, Frozen-thawed cycled exposure test device of the present invention can be directly placed at outdoor, utilize nature ring
Temperature realization in border is freezed, and the problem of temperature is monotonically changed in indoor fast freeze-thaw cyclic test is avoided, and sufficiently reflects true
The time-varying effecting of environment temperature solves sample dimensions, shape and military service place limitation problem.
The present invention using water-retaining type electric calorifie installation overcome winter freeze, the natural environment of spring break constrain, solve freeze
Melt test specimen in circulation exposure test and be difficult to realize multiple defrosting problem under cryogenic, improves Frozen-thawed cycled exposure test
Freeze thawing efficiency.
Compared with prior art, test method of the present invention the utility model has the advantages that
Test method of the present invention freezes test specimen using natural conditions, sufficiently reflects true environment temperature
Time-varying effecting is spent, to improve the accuracy of test result, provides technology ginseng for the durable Journal of Sex Research of cold district engineering structure
It examines；Thawed using waterproof heating wire, overcome winter freeze, the natural environment of spring break constraint, increase freeze thawing and follow
The number of ring exposure test improves Frozen-thawed cycled efficiency.
Detailed description of the invention:
Fig. 1 is a kind of structural schematic diagram of Frozen-thawed cycled exposure test device described in the embodiment of the present invention 1.
Fig. 2 is a kind of structural schematic diagram of Frozen-thawed cycled exposure test device described in the embodiment of the present invention 2.
Marked in the figure: 1- solar panel, 2- installs case, 3- switch, 4- counter, 5- energy storage equipment, 6- bracket, 7-
Water-retaining type electric calorifie installation, 8- test specimen, 9- temperature sensor, 10- conducting wire.
Specific embodiment
Below with reference to test example and specific embodiment, the present invention is described in further detail.But this should not be understood
It is all that this is belonged to based on the technology that the content of present invention is realized for the scope of the above subject matter of the present invention is limited to the following embodiments
The range of invention.
Embodiment 1
As shown in Figure 1, a kind of Frozen-thawed cycled exposure test device, the water-retaining type electric heating including 8 surface of test specimen can be wrapped in
Device 7, and the power supply device being connected with the water-retaining type electric calorifie installation 7.
The water-retaining type electric calorifie installation 7 include waterproof heating wire and water retention carpet, the water retention carpet include geotextiles, felt,
The preferable blanket works of the water-retaining propertys such as concrete curing cloth, the waterproof heating wire can Direct Uniform be fixed on the water retention carpet
On.
The power supply device includes energy storage equipment 5, and the solar panel 1 being connected with the energy storage equipment 5.Institute
It states energy storage equipment 5 to be located in the installs case 2, the installs case 2 and solar panel 1 are placed on bracket 6.The accumulation of energy dress
It sets and is connected between 5 and waterproof heating wire by conducting wire 10, and be equipped with the switch 3 for controlling the opening and closing of waterproof heating wire.
It is tested using a kind of above-mentioned Frozen-thawed cycled exposure test device, comprising the following steps:
Step 1: installation solar panel 1 and energy storage equipment 5；
Step 2: in the surface wrap water-retaining type electric calorifie installation 7 of test specimen 8, and by the waterproof heating wire and energy storage equipment 5
It is connected, water retention carpet is bedewed, the test specimen 8 is then placed on outdoor；
Step 3: freezing the test specimen 8 by outdoor low temperature, while the solar panel 1 generates electricity and is stored in
In energy storage equipment 5；
Step 4: when the solidification point of the test specimen 8 reaches default frozen standard, switch 3, the waterproof electric heating are opened
Silk is powered, and thaws to the test specimen 8, and the default frozen standard is set according to test requirements document；
Step 5: when the test specimen 8 defrosting to default defrosting standard, 3 are turned off the switch, the waterproof heating wire stops adding
Heat, the test specimen 8 complete a wheel freeze thawing, and the default defrosting standard is set according to test requirements document；
Step 6: repeating step 3 to step 5, and the test specimen 8 enters new round freeze thawing, until needed for reaching test
Freezing-thawing cycles.
Embodiment 2
The present embodiment is that the present embodiment can realize the automatic Frozen-thawed cycled of test specimen 8 with the difference for implementing 1, without artificial
Open-close on-off 3.
Specifically, as shown in Fig. 2, a kind of Frozen-thawed cycled exposure test device further includes having in 8 surface layout of test specimen
Multiple temperature sensors 9, all temperature sensors 9 are respectively connected with switch 3, and the switch 3 is temperature detect switch (TDS), described to open
It closes 3 and is also connected with counter 4, the switch 3 is every to be opened once, and the counter 4 records once.
It is tested using a kind of above-mentioned Frozen-thawed cycled exposure test device, comprising the following steps:
Step 1: installation solar panel 1 and energy storage equipment 5；
Step 2: in the surface wrap water-retaining type electric calorifie installation 7 of test specimen 8, and by the waterproof heating wire and energy storage equipment 5
It is connected, water retention carpet is bedewed, the test specimen 8 is then placed on outdoor；
Step 3: freezing the test specimen 8 by outdoor low temperature, while the solar panel 1 generates electricity and is stored in
In energy storage equipment 5；
Step 4: when the temperature of all temperature sensors 9 reaches default frozen standard, temperature detect switch (TDS) is opened automatically
It opens, the waterproof heating wire is powered, and thaws to the test specimen 8, and the default frozen standard is carried out according to test requirements document
Setting；
Step 5: when the temperature of all temperature sensors 9 reaches default defrosting standard, temperature detect switch (TDS) closes automatically
It closes, the waterproof heating wire stops heating, and the test specimen 8 completes a wheel freeze thawing, and the counter 4 records once, described default
Defrosting standard is set according to test requirements document；
Step 6: repeating step 3 to step 5, and the test specimen 8 enters new round freeze thawing, until needed for reaching test
Freezing-thawing cycles.
Preferably, the switch 3 is temperature-time controller, in the step 4, when all temperature sensors 9
When temperature reaches default frozen standard and when the freeze-off time of the test specimen 8 reaches minimum interval, the switch 3 is
It automatically turns on, the waterproof heating wire is powered and thaws to the test specimen 8.The default frozen standard and minimum time
Interval is set according to test requirements document.
Above embodiments are only to illustrate the present invention and not limit the technical scheme described by the invention, although this explanation
The present invention has been described in detail referring to above-mentioned each embodiment for book, but the present invention is not limited to above-mentioned specific implementation
Mode, therefore any couple of present invention modifies or equivalent replacement；And the technical side of all spirit and scope for not departing from invention
Case and its improvement, are intended to be within the scope of the claims of the invention.
Claims (10)
1. a kind of Frozen-thawed cycled exposure test device, which is characterized in that the water-retaining type electric heating including test specimen (8) surface can be wrapped in
Device (7), and the power supply device being connected with the water-retaining type electric calorifie installation (7), the water-retaining type electric calorifie installation (7) include
Waterproof heating wire and water retention carpet.
2. a kind of Frozen-thawed cycled exposure test device according to claim 1, which is characterized in that the water retention carpet includes soil
Work cloth, felt, concrete curing cloth.
3. a kind of Frozen-thawed cycled exposure test device according to claim 1, which is characterized in that test specimen (8) surface
It is disposed with multiple temperature sensors (9).
4. a kind of Frozen-thawed cycled exposure test device according to claim 3, which is characterized in that all temperature sensing
Device (9) is respectively connected with switch (3), and the switch (3) is temperature detect switch (TDS), and the switch (3) is for controlling the waterproof heating wire
Opening and closing.
5. a kind of Frozen-thawed cycled exposure test device according to claim 4, which is characterized in that the switch (3) is temperature
Spend time controller.
6. a kind of Frozen-thawed cycled exposure test device according to claim 4, which is characterized in that switch (3) connection
There are counter (4).
7. -6 any a kind of Frozen-thawed cycled exposure test device according to claim 1, which is characterized in that the power supply dress
It sets including energy storage equipment (5), and the solar panel (1) being connected with the energy storage equipment (5).
8. a kind of Frozen-thawed cycled exposure test method, which is characterized in that utilize a kind of freeze thawing as claimed in claim 1
Circulation exposure test device is tested, comprising the following steps:
Step 1: in the surface wrap water-retaining type electric calorifie installation (7) of test specimen (8), and by the waterproof heating wire and power supply device
It is connected, water retention carpet is bedewed, the test specimen (8) is then placed on outdoor；
Step 2: the test specimen (8) is freezed by outdoor low temperature；
Step 3: when the solidification point of the test specimen (8) reaches default frozen standard, the waterproof heating wire is opened to described
Test specimen (8) thaws；
Step 4: when the test specimen (8) defrosting to default defrosting standard, the waterproof heating wire is closed, the test specimen (8) is complete
At a wheel freeze thawing；
Step 5: repeating step 2 to step 4, and the test specimen (8) enters new round freeze thawing, until reaching jelly needed for test
Melt cycle-index.
9. a kind of Frozen-thawed cycled exposure test method according to claim 8, which is characterized in that in the test specimen (8) table
Multiple temperature sensors (9) are installed in face, and all temperature sensors (9) are connected with switch (3), and the switch (3) is temperature
Control switch, the switch (3) are connected with the waterproof heating wire,
In the step 3, when the temperature of all temperature sensors (9) reaches default frozen standard, the switch (3)
It automatically turning on, the waterproof heating wire is powered and thaws to the test specimen (8),
In the step 4, when the temperature of all temperature sensors (9) reaches default defrosting standard, the switch
(3) it is automatically closed, the waterproof heating wire stops heating.
10. a kind of Frozen-thawed cycled exposure test method according to claim 8, which is characterized in that the power supply device packet
It includes energy storage equipment (5), and the solar panel (1) being connected with the energy storage equipment (5), is tried described in the step 2
For part (8) during outdoor is freezed, the solar panel (1), which converts solar energy into electrical energy, is stored in battery (5)
In, stored electric energy thaws to the test specimen (8) for waterproof heating wire described in the step 3.
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