CN108507939A - A kind of real-time measurement apparatus and its measurement method of the variation of temperature and humidity control cement-based material length - Google Patents
A kind of real-time measurement apparatus and its measurement method of the variation of temperature and humidity control cement-based material length Download PDFInfo
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- CN108507939A CN108507939A CN201810257217.9A CN201810257217A CN108507939A CN 108507939 A CN108507939 A CN 108507939A CN 201810257217 A CN201810257217 A CN 201810257217A CN 108507939 A CN108507939 A CN 108507939A
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- Prior art keywords
- temperature
- humidity control
- humidity
- environmental cabinet
- length
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D27/00—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00
- G05D27/02—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00 characterised by the use of electric means
Abstract
The invention discloses a kind of real-time measurement apparatus of temperature and humidity control cement-based material length variation, including closed temperature and humidity control environmental cabinet 10, temperature control unit 8 and humid control component 9 are removably installed, temperature and humidity control environmental cabinet 10 is also equipped with the measuring device for measuring the variation of material for test length in temperature and humidity control environmental cabinet 10.The invention also discloses the measurement methods of the real-time measurement apparatus of this kind of temperature and humidity control cement-based material length variation, the present invention realizes ambient humidity control using replaceable saturated salt solution in solution pool, it is arranged in pairs or groups by 7 quantity of hot pin equipped with liquefied ammonia to realize environment temperature control, is changed to detect piece lengths using length measure of the change device.Solve the problems, such as cement paste/mortar humidity variation or cryogenic temperature change condition under length variation in real time monitoring, can be used for the cement-based materials such as cement paste/mortar/concrete by humidity influenced or low temperature harsh climate condition under the influence of volume change research and application.
Description
Technical field
The invention belongs to civil engineering material performance detection instrument technical fields, and in particular to a kind of temperature and humidity control cement base
The real-time measurement apparatus and its measurement method of length of material variation.
Background technology
Concrete material extensive utilization in modern architecture, it is excellent that it has that cheap, applied widely, durability is good etc.
Point, but it encounters different humiture environment during being on active service, and understands this contraction or expansion for causing concrete, can then make to mix
Solidifying local products give birth to cracking phenomena.Since concrete performance is influenced by cement consumption, cement shrinkage performance directly affects cement concrete
Use quality therefore generally evaluate the shrinkage performance of cement by measuring the contract with dry rate of cement mortar.
According to《JC/T 603-2004 cement mortar dry shrinkage test methods》, test specimen surveyed in preparation, maintenance, using comparator
After measuring initial length, test specimen is moved into the curing box of regulation humiture, further takes out, is positioned over positioned at room temperature environment after a certain period of time
Under comparator on measure.The disadvantages of this method is, can not rule out test specimen and is moved into involved by taking-up in the process multiple
The influence of environment suddenly change or other factors, and trivial operations.The purpose of the present invention is accurately and effectively evaluate external environment
The variation of cement-based material length under the conditions of humidity or temperature change changes environmental condition measurement in the case where test specimen does not move
The real-time change of piece lengths more meets engineering reality.
Existing length measurement technique is all kinds of cement mortar comparators, and comparator is a kind of for measuring cement mortar test specimen
The instrument of the expansion rate of contract with dry rate and expanding cement each age of each age, including amesdial, upper gauge head, 90 ° of V-type bearings, under
Gauge head, standard rod, pedestal etc..It has the advantages that easy to use, high certainty of measurement, speed is fast, and reading understands.To avoid because of ring
Repeatedly mutation impacts in border, and length-measuring appliance and test specimen can jointly be moved into environmental cabinet, but can not rule out measurement dress in this way
The unfavorable factors such as the generation variation affected by environment of the components such as the holder set and amesdial precision are impacted.
The present invention proposes a temperature and humidity control environmental cabinet, and with comparator, this length measure of the change device is combined, institute
With components such as holders all using small invar alloy making is affected by temperature, amesdial is mounted on outside environmental cabinet, avoids original
The problem of being brought in test process, and it is easy to operate, cement paste, mortar and coagulation are can measure in the case where not moving test specimen
The variation relation of the piece lengths such as soil and temperature, humidity.
Invention content
The present invention is to solve existing cement mortar convergent-divergent measuring device, complicated, test specimen transfer that there are test operations
The problems such as process causes error by multiple environmental catastrophe provides a kind of real-time survey of temperature and humidity control cement-based material length variation
Device and its measurement method are measured, cement-based material length under the conditions of external environment humidity or temperature change is accurately and effectively evaluated
Variation, the real-time change for changing environmental condition measurement piece lengths in the case where test specimen does not move more meet engineering reality.
The present invention solves its technical problem and is achieved through the following technical solutions：
A kind of real-time measurement apparatus of temperature and humidity control cement-based material length variation, including closed temperature and humidity control environmental cabinet
(10), temperature control unit (8) and humid control component (9)；
Several closeable ports (11), the temperature control part are offered on temperature and humidity control environmental cabinet (10) side wall
Part (8) includes several hot pins (7) that temperature and humidity control environmental cabinet (10) can be inserted into from port (11), and the hot pin (7) includes sealing
Barred body (71), the barred body (71) be it is hollow, barred body (71) bottom storage has the liquefied ammonia (72) to absorbing and cooling temperature；
The humid control component (9) includes solution pool (91), and saturated salt solution is filled in the solution pool (91)
(93), it is removably covered with partition board (94) on the solution pool (91), is equipped with and pushes away in the one side wall of the solution pool (91)
Plate (92), through-hole (12) is further opened on the side wall of the temperature and humidity control environmental cabinet (10), and the solution pool (91) passes through through-hole
(12) slidable to be in and out of temperature and humidity control environmental cabinet (10), the push plate (92) is located on the outside of temperature and humidity control environmental cabinet (10),
And the diameter of the push plate (92) is more than the diameter of through-hole (12)；
Measuring device is also equipped in the temperature and humidity control environmental cabinet (10), the measuring device includes pedestal (4), described
Holder (3) for clamping test pieces (2) is installed on pedestal (4), is connected on the test specimen (2) long for measuring test specimen (2)
The measuring instrument (1) of variation is spent, it is external that the measuring instrument (1) is mounted on temperature and humidity control environmental cabinet (10)；
The Hygrothermograph for reading test specimen (2) ambient temperature and humidity is also equipped in the temperature and humidity control environmental cabinet (10)
(6)。
Further, barred body (71) upper outside is equipped with cooling fin (73).
Further, sealing rubber ring (74), and the sealing rubber ring are bonded on barred body (71) lateral wall
(74) material is low temperature resistant silicon rubber.
Further, the top of the temperature and humidity control environmental cabinet (10) offers location hole, and cystosepiment (5) setting exists
In location hole, and Hygrothermograph (6) is inserted on the cystosepiment (5), the Hygrothermograph (6) stretches into temperature and humidity control environmental cabinet
(10)。
Further, the measuring instrument (1) is amesdial；Or the measuring instrument (1) is electronic displacement sensor.
Further, the material therefor of the barred body (71) is steel.
Further, the material that the temperature and humidity control environmental cabinet (10) uses is organic glass, or uses transparent, resistance to low
The material of temperature, described low temperature resistant ranging from -30 DEG C~30 DEG C.
Further, holder (3) material therefor is invar alloy.
Further, the test specimen (2) is shunk during temperature reduces, and the test specimen (2) is generated ice in it leads
Temperature when length being caused to increase suddenly, is determined as the freezing temperature of test specimen (2).
A kind of measurement method of the real-time measurement apparatus of temperature and humidity control cement-based material length variation, includes the following steps：
(1) keep temperature-resistant, control humidity variation
1) experimental situation that temperature is more than 0 DEG C is chosen, and keeps temperature-resistant in experiment, closes temperature and humidity control environmental cabinet
(10) all ports (11) keep sealing；
2) according to the equilibrium relative humidity value of saturated salt solution under the experimental temperature of reference, the saturated salt of different solutes is configured
Solution；
3) ambient humidity at this time at normal temperatures, is read, the initial length of test specimen (2) is measured and records the initial length,
Then it disposes and stablizes on length-measuring appliance, the test specimen (2) is 40mm × 40mm × 160mm standard cement mortar specimens；
4) length-measuring appliance calibration is returned to zero with measuring instrument (1)；
5) a kind of saturated salt solution is fitted into solution pool (91) when testing, in push-in temperature and humidity control environmental cabinet (10), dimension
It holds constant humidity 14 days, reads measuring instrument (1) and read and the temperature of Hygrothermograph (6), humidity value and record；
6) it is arranged from high to low according to the maintainable environmental wet angle value of different solute saturated salt solutions, carries out step successively
(5) experiment, until experiment humidity terminates to test when being reduced to 22%RH from 97%RH；
7) data processing, error analysis obtain cement mortar specimen length and humidity variation relation；
(2) it keeps humidity constant, controls temperature change
1) several hot pins (7) are made, and fill the liquefied ammonia of different volumes respectively, the hot pin made (7) is stored in-
In 40 DEG C of refrigerator-freezer；
2) experimental situation humidity at this time is read, the initial length of test specimen (2) is measured and records the initial length, is then existed
It disposes and stablizes on length-measuring appliance, the test specimen (2) is 40mm × 40mm × 160mm standard cement mortar specimens；
3) length-measuring appliance calibration is returned to zero with measuring instrument (1)；
4) hot pin (7) is taken out, is inserted into temperature and humidity control environmental cabinet (10) from port (11), the bottom of the barred body (71)
Portion stretches into temperature and humidity control environmental cabinet (10), and the top of the barred body (71) is located at temperature and humidity control environmental cabinet (10) outside, described
The junction of hot pin (7) and temperature and humidity control environmental cabinet (10) keeps sealing；
5) temperature for reading Hygrothermograph (6), maintains Current Temperatures 1 hour, reads the reading and note of measuring instrument (1)
Record；
6) increase a hot pin (7) every time, repeat this test procedure (4) and (5), until temperature is down to -18 DEG C；
7) it reduces by a hot pin (7) every time, repeats this test procedure (4) and (5), until temperature is increased to 4 DEG C；
8) terminate experiment to put back to all hot pins (7) in -40 DEG C of refrigerator-freezer；
9) data processing, error analysis obtain test specimen (2) length and temperature change relationship.
Beneficial effects of the present invention are：
1, at normal temperatures, standard specimen made of cement-based material (40mm × 40mm × 160mm) is mounted on by the present invention
It is no longer moved on length-measuring appliance, using organic glass box is sealed, establishes a separate space, be arranged in cabinet front through-hole
The saturated salt solution pond that dismounting can be pushed and pulled maintains ambient humidity by being packed into saturated salt solution in pond, and configures different solutes
Saturated salt solution fractional test makes this experimental enviroment humid control in 22%~97%RH.Piece lengths can be directly obtained as a result,
With the relationship of ambient humidity.
2, the present invention fills standard specimen made of cement-based material (40mm × 40mm × 160mm) mounted on linear measure longimetry
It sets and no longer moves, using organic glass box is sealed, establish a separate space, several openings are opened on babinet, place heat
Stick controls the variation of environment temperature by the collocation of the hot pin quantity of the hot pin and placement of built-in different volumes liquefied ammonia, can make
Test ambient temperature controls between -20 DEG C~25 DEG C.The relationship of piece lengths and environment temperature can be directly obtained as a result, also
It can be by obtaining the freezing temperature of test specimen in the volume expansion of a certain temperature.
Description of the drawings
Fig. 1 is the dimensional structure diagram of temperature and humidity control environmental cabinet of the present invention；
Fig. 2 is the structural schematic diagram of hot pin in the present invention；
Fig. 3 is the structural schematic diagram of solution pool in the present invention.
Reference sign：
1- measuring instruments, 2- test specimens, 3- holders, 4- pedestals, 5- cystosepiments, 6- Hygrothermographs, 7- hot pins, 71- barred bodies,
72- liquefied ammonia, 73- cooling fins, 74- rubber rings, 8- temperature control units, 9- humid controls component, 91- solution pools, 92- push plates,
93- saturated salt solutions, 94- partition boards, 10- temperature and humidity controls environmental cabinet, 11- ports, 12- through-holes.
Specific implementation mode
Below by specific embodiment, the invention will be further described, and following embodiment is descriptive, is not limit
Qualitatively, protection scope of the present invention cannot be limited with this.
On the basis of existing length measurement technique, the present invention provides a kind of variation of temperature and humidity control cement-based material length
Real-time measurement apparatus, including a temperature and humidity control environmental cabinet and a length measure of the change device, it can be achieved that temperature higher than 0 degree and
Keep definite value, when varying humidity piece lengths variation it is real-time measure and cryogenic conditions under the real-time survey that changes of piece lengths
Amount.
As shown in Figure 1 to Figure 3, a kind of real-time measurement apparatus of temperature and humidity control cement-based material length variation, including it is closed
Temperature and humidity control environmental cabinet 10, tank material is organic glass, it is possible to use other transparent low temperature resistant (- 30 DEG C~30 DEG C ranges)
Material replace.Several closeable ports 11 are offered on 10 side wall of temperature and humidity control environmental cabinet, to install other component
To realize temperature control or control wet, babinet and the holding sealing of other component junction.
Temperature control unit 8 includes several hot pins 7 that temperature and humidity control environmental cabinet 10 can be inserted into from port 11, and hot pin 7 includes
Hollow barred body 71, barred body material therefor are steel.71 bottom storage of barred body has the liquefied ammonia 72 to absorbing and cooling temperature, 71 envelope of barred body
It closes, prevents A leak of liquefied ammonia from causing the accident.71 upper outside of barred body is equipped with cooling fin 73, reinforces liquefied ammonia temperature reduction performance.Barred body 71
Lateral wall is also bonded with rubber ring 74, to make more preferable, the rubber with the sealing effect of temperature and humidity control environmental cabinet 10 at work of hot pin 7
Cushion rubber 74 and 71 angle at 45 ° of barred body, 74 material therefor of rubber ring are low temperature resistant silicon rubber.Hot pin 7 when in use, the bottom of barred body 71
Portion stretches into temperature and humidity control environmental cabinet 10, and the top of barred body 71 is located at outside temperature and humidity control environmental cabinet 10, hot pin 7 and temperature and humidity control
The junction of environmental cabinet 10 keeps sealing.The present invention utilizes the molten boiling nature (- 77 DEG C of fusing point, -33 DEG C of boiling point) of ammonia, easily boils
Evaporation, to absorbing and cooling temperature.Liquefied ammonia 72 is stored in the hot pin 7 of steel, closed sealing prevents experiment process because NH_3 leakage is made
At accident.Before use, the hot pin 7 equipped with liquefied ammonia 72 is stored in the ice of -40 DEG C (according to the molten boiling point of ammonia, ammonia is liquid at this time)
In cabinet；Hot pin 7, which takes out, when use is inserted into temperature and humidity control environmental cabinet 10, puts back to hot pin 7 in former storage cabinet again after use, ammonia is again
Become liquid, it is reusable.It determines to be packed into heat according to the temperature range that the size of temperature and humidity control environmental cabinet 10 and needs are tested
72 volume of liquefied ammonia of stick 7 by 7 built-in different volumes liquefied ammonia of hot pin and changes hot pin 7 in insertion temperature and humidity control environmental cabinet 10
Quantity, to adjust the temperature change in temperature and humidity control environmental cabinet 10, the present apparatus test temperature can be controlled -20 DEG C~25 DEG C it
Between.
Humid control component 9 includes solution pool 91, and saturated salt solution 93 is filled in solution pool 91.It is removable on solution pool 91
That unloads is covered with partition board 94, the saturated salt solution 93 being conveniently replaceable in solution pool 91, while molten by the change of partition board 94 saturated salt
The contact condition of liquid 93 and temperature and humidity control environmental cabinet 10.Push plate 92, temperature and humidity control ring are installed on one side wall of solution pool 91
Through-hole 12 is further opened on the side wall of border case 10, solution pool 91 is slidably in and out of temperature and humidity control environmental cabinet across through-hole 12
10, push plate 92 is located at the outside of temperature and humidity control environmental cabinet 10, and the diameter of push plate 92 is more than the diameter of through-hole 12, solution pool 91 into
After entering temperature and humidity control environmental cabinet 10, push plate 92 can resist the leakproofness that through-hole 12 ensures temperature and humidity control environmental cabinet 10.Normal temperature condition
Under, it, can be by experiment humid control in 22%~97%RH by replacing the type of saturated salt solution 93.The present invention uses saturated salt
Solution carrys out control cabinet vivo environment humidity, configures different solute saturated salt solutions change ambient humidities and is tested.The present invention selects
25 DEG C of room temperature is taken to be tested, when can refer to following 25 DEG C, the rh value of different solute saturated salt solutions【Hua Youping are used
Moisture control method [J] sufacings of various aqueous solutions, 1979 (4)】.
Saturated acetic acid potassium solution：22.51 ± 0.32%RH
It is saturated magnesium chloride solution：32.78 ± 0.16%RH
Unsaturated carbonate potassium solution：43.16 ± 0.39%RH
It is saturated magnesium nitrate solution：52.89 ± 0.22%RH
Saturated nacl aqueous solution：75.29 ± 0.12%RH
Saturated potassium chloride solution：84.34 ± 0.26%RH
It is saturated potassium nitrate solution：93.58 ± 0.55%RH
It is saturated potassium sulfate solution：97.30 ± 0.45%RH
According to the type of saturated salt solution 93, the material of the solution pool 91 can be glass or organic plastics.
Measuring device is also equipped in temperature and humidity control environmental cabinet 10, measuring device includes pedestal 4, is installed on pedestal 4 useful
In the holder 3 of clamping test pieces 2,3 material therefor of holder is invar alloy.Invar alloy has (- 20 DEG C of lower coefficient of thermal expansion
Between~20 DEG C, coefficient of thermal expansion average value about 1.6 × 10-6/ DEG C, about the 1/10 of concrete material).When the temperature is changed,
The length of test specimen 2 changes with temperature, and the small essence changed to 2 length of test specimen to realization is deformed because holder 3 is affected by temperature
Really measure.Test specimen 2 is 40mm × 40mm × 160mm standard cement mortar specimens；Also 2 size of test specimen can be changed according to test request
To measure the length variation of cement paste or concrete material.Test specimen 2 is connected with the measuring instrument 1 for measuring length variation,
Measuring instrument 1 is amesdial, is mounted on outside temperature and humidity control environmental cabinet 10, avoids amesdial 1 because of humiture variation influence in babinet
Precision；Electronic displacement sensor can also be used to replace in amesdial 1, is connect with computer, it can be achieved that monitoring examination more in real time
The variation of part length, and reduce manpower.
The measuring device can be used for monitoring the freezing temperature of test specimen 2 simultaneously.During temperature reduces, test specimen 2 can be shunk,
If however, when having a large amount of ice to generate suddenly in test specimen 2,2 length of test specimen can increase suddenly, and temperature is then the knot of test specimen 2 at this time
Ice temperature.
The Hygrothermograph 6 for reading test specimen ambient temperature and humidity is also equipped in temperature and humidity control environmental cabinet 10.Hygrothermograph 6
It being fixed by cystosepiment 5, the top of temperature and humidity control environmental cabinet 10 offers location hole, and cystosepiment 5 is arranged in location hole,
And Hygrothermograph 6 is inserted on cystosepiment 5, Hygrothermograph 6 stretches into temperature and humidity control environmental cabinet 10.Electronics temperature can be used in Hygrothermograph 6
Hygrometer replaces, and connect with computer, it can be achieved that more accurately real-time monitoring case body temperature, the situation of change of humidity, in conjunction with
Electronic displacement sensor can accurately obtain the variation of 2 length of test specimen and temperature or the relationship of humidity.
A kind of measurement method of the real-time measurement apparatus of temperature and humidity control cement-based material length variation of the present invention, including such as
Lower step：
(1) keep temperature-resistant, control humidity variation
1) experimental situation that temperature is more than 0 DEG C is chosen, and keeps temperature-resistant in experiment, closes temperature and humidity control environmental cabinet
10 all ports 11 keep sealing；
2) according to the equilibrium relative humidity value of saturated salt solution under the experimental temperature of reference, the saturated salt of different solutes is configured
Solution；
3) ambient humidity at this time at normal temperatures, is read, the initial length of test specimen 2 is measured and records the initial length, so
It disposes and stablizes on length-measuring appliance afterwards；
4) length-measuring appliance calibration is returned to zero with measuring instrument 1；
5) when testing, solution pool 91 is pulled out into temperature and humidity control environmental cabinet 10 by push plate 92, opens partition board 94 one kind is full
It is fitted into solution pool 91 with salting liquid.The solution pool 91 for installing saturated salt solution is pushed into temperature and humidity control environmental cabinet 10 again, dimension
It holds constant humidity 14 days, read the reading of measuring instrument 1 and the temperature of Hygrothermograph 6, humidity value and records；
6) it is arranged from high to low according to the maintainable environmental wet angle value of different solute saturated salt solutions, carries out step 5 successively
Experiment, until humidity terminates to test when being reduced to 22%RH from 97%RH；
7) data processing, error analysis obtain cement mortar specimen length and humidity variation relation；
(2) it keeps humidity constant, controls temperature change
1) several hot pins 7 are made, and fill the liquefied ammonia of different volumes respectively, the hot pin 7 made is stored in -40 DEG C
Refrigerator-freezer in；
2) experimental situation humidity at this time is read, the initial length of test specimen 2 is measured and records the initial length, then in length
It spends to dispose in measuring device and stablize, and the partition board 94 on solution pool 91 is covered, push plate 92 and 10 side wall of temperature and humidity control environmental cabinet
It is adjacent to, keeps good leakproofness；
3) length-measuring appliance calibration is returned to zero with measuring instrument 1；
4) hot pin 7 is taken out, is inserted into temperature and humidity control environmental cabinet 10 from port 11, temperature control control is stretched into the bottom of barred body 71
Wet environment case 10, and the top of barred body 71 is located at outside temperature and humidity control environmental cabinet 10, the company of hot pin 7 and temperature and humidity control environmental cabinet 10
It meets place and keeps sealing；
5) temperature for reading Hygrothermograph 6, maintains Current Temperatures 1 hour, reads the reading and record of measuring instrument 1；
6) increase a hot pin every time, repeat this test procedure 4 and 5, until temperature is down to -18 DEG C；
7) it reduces by a hot pin every time, repeats this test procedure 4 and 5, until temperature is increased to 4 DEG C；
8) terminate experiment to put back to all hot pins 7 in -40 DEG C of refrigerator-freezer；
9) data processing, error analysis obtain 2 length of test specimen and temperature change relationship.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of real-time measurement apparatus of temperature and humidity control cement-based material length variation, it is characterised in that：Including closed temperature control
Control wet environment case (10), temperature control unit (8) and humid control component (9)；
Several closeable ports (11), the temperature control unit are offered on temperature and humidity control environmental cabinet (10) side wall
(8) include several hot pins (7) that temperature and humidity control environmental cabinet (10) can be inserted into from port (11), the hot pin (7) includes sealing
Barred body (71), the barred body (71) are hollow, and barred body (71) bottom storage has the liquefied ammonia (72) to absorbing and cooling temperature；
The humid control component (9) includes solution pool (91), and saturated salt solution (93), institute are filled in the solution pool (91)
It states and is removably covered with partition board (94) on solution pool (91), push plate (92) is installed in the one side wall of the solution pool (91),
Through-hole (12) is further opened on the side wall of the temperature and humidity control environmental cabinet (10), the solution pool (91) passes through through-hole (12) that can slide
Dynamic to be in and out of temperature and humidity control environmental cabinet (10), the push plate (92) is located on the outside of temperature and humidity control environmental cabinet (10), and described pushes away
The diameter of plate (92) is more than the diameter of through-hole (12)；
Measuring device is also equipped in the temperature and humidity control environmental cabinet (10), the measuring device includes pedestal (4), the pedestal
(4) holder (3) for clamping test pieces (2) is installed on, is connected on the test specimen (2) and becomes for measuring test specimen (2) length
The measuring instrument (1) of change, it is external that the measuring instrument (1) is mounted on temperature and humidity control environmental cabinet (10)；
The Hygrothermograph (6) for reading test specimen (2) ambient temperature and humidity is also equipped in the temperature and humidity control environmental cabinet (10).
2. a kind of real-time measurement apparatus of temperature and humidity control cement-based material length variation as described in claim 1, feature exist
In：Barred body (71) upper outside is equipped with cooling fin (73).
3. a kind of real-time measurement apparatus of temperature and humidity control cement-based material length variation as described in claim 1, feature exist
In：Sealing rubber ring (74) is bonded on barred body (71) lateral wall, and the material of the sealing rubber ring (74) is resistance to low
Warm silicon rubber.
4. a kind of real-time measurement apparatus of temperature and humidity control cement-based material length variation as described in claim 1, feature exist
In：The top of the temperature and humidity control environmental cabinet (10) offers location hole, and the cystosepiment (5) is arranged in location hole, and institute
It states and is inserted with Hygrothermograph (6) on cystosepiment (5), the Hygrothermograph (6) stretches into temperature and humidity control environmental cabinet (10).
5. a kind of real-time measurement apparatus of temperature and humidity control cement-based material length variation as described in claim 1, feature exist
In：The measuring instrument (1) is amesdial；Or the measuring instrument (1) is electronic displacement sensor.
6. a kind of real-time measurement apparatus of temperature and humidity control cement-based material length variation as described in claim 1, feature exist
In：The material therefor of the barred body (71) is steel.
7. a kind of real-time measurement apparatus of temperature and humidity control cement-based material length variation as described in claim 1, feature exist
In：The material that the temperature and humidity control environmental cabinet (10) uses is organic glass, or uses transparent, low temperature resistant material, described
Low temperature resistant ranging from -30 DEG C~30 DEG C.
8. a kind of real-time measurement apparatus of temperature and humidity control cement-based material length variation as described in claim 1, feature exist
In：Holder (3) material therefor is invar alloy.
9. a kind of real-time measurement apparatus of temperature and humidity control cement-based material length variation as described in claim 1, feature exist
In：The test specimen (2) is shunk during temperature reduces, and the test specimen (2) is generated ice in it causes length to increase suddenly
When temperature, be determined as the freezing temperature of test specimen (2).
10. a kind of survey of the real-time measurement apparatus based on the temperature and humidity control cement-based material length variation described in claim 1~9
Amount method, it is characterised in that：Include the following steps：
(1) keep temperature-resistant, control humidity variation
1) experimental situation that temperature is more than 0 DEG C is chosen, and keeps temperature-resistant in experiment, closes temperature and humidity control environmental cabinet (10)
All ports (11) keep sealing；
2) according to the equilibrium relative humidity value of saturated salt solution under the experimental temperature of reference, the saturated salt for configuring different solutes is molten
Liquid；
3) ambient humidity at this time at normal temperatures, is read, the initial length of test specimen (2) is measured and records the initial length, then
It disposes and stablizes on length-measuring appliance, the test specimen (2) is 40mm × 40mm × 160mm standard cement mortar specimens；
4) length-measuring appliance calibration is returned to zero with measuring instrument (1)；
5) a kind of saturated salt solution is fitted into solution pool (91) when testing, in push-in temperature and humidity control environmental cabinet (10), remains permanent
Determine humidity 14 days, reads measuring instrument (1) and read and the temperature of Hygrothermograph (6), humidity value and record；
6) it is arranged from high to low according to the maintainable environmental wet angle value of different solute saturated salt solutions, carries out step (5) successively
Experiment, until experiment humidity terminates to test when being reduced to 22%RH from 97%RH；
7) data processing, error analysis obtain cement mortar specimen length and humidity variation relation；
(2) it keeps humidity constant, controls temperature change
1) several hot pins (7) are made, and fill the liquefied ammonia of different volumes respectively, the hot pin made (7) is stored in -40 DEG C
Refrigerator-freezer in；
2) experimental situation humidity at this time is read, the initial length of test specimen (2) is measured and records the initial length, then in length
It disposes and stablizes in measuring device, the test specimen (2) is 40mm × 40mm × 160mm standard cement mortar specimens；
3) length-measuring appliance calibration is returned to zero with measuring instrument (1)；
4) hot pin (7) is taken out, is inserted into temperature and humidity control environmental cabinet (10) from port (11), the bottom of the barred body (71) is stretched
Enter temperature and humidity control environmental cabinet (10), and the top of the barred body (71) is located at temperature and humidity control environmental cabinet (10) outside, the hot pin
(7) it keeps sealing with the junction of temperature and humidity control environmental cabinet (10)；
5) temperature for reading Hygrothermograph (6), maintains Current Temperatures 1 hour, reads the reading and record of measuring instrument (1)；
6) increase a hot pin (7) every time, repeat this test procedure (4) and (5), until temperature is down to -18 DEG C；
7) it reduces by a hot pin (7) every time, repeats this test procedure (4) and (5), until temperature is increased to 4 DEG C；
8) terminate experiment to put back to all hot pins (7) in -40 DEG C of refrigerator-freezer；
9) data processing, error analysis obtain test specimen (2) length and temperature change relationship.
Priority Applications (1)
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