CN106769612A - A kind of wall-building brick water swelling deformation dynamics tester and method of testing - Google Patents
A kind of wall-building brick water swelling deformation dynamics tester and method of testing Download PDFInfo
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- CN106769612A CN106769612A CN201710003656.2A CN201710003656A CN106769612A CN 106769612 A CN106769612 A CN 106769612A CN 201710003656 A CN201710003656 A CN 201710003656A CN 106769612 A CN106769612 A CN 106769612A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 114
- 230000008961 swelling Effects 0.000 title claims abstract description 47
- 239000011469 building brick Substances 0.000 title claims abstract description 30
- 238000010998 test method Methods 0.000 title claims abstract description 7
- 238000012360 testing method Methods 0.000 claims abstract description 170
- 239000011521 glass Substances 0.000 claims abstract description 116
- 238000005259 measurement Methods 0.000 claims abstract description 44
- 239000003708 ampul Substances 0.000 claims abstract description 24
- 239000010453 quartz Substances 0.000 claims abstract description 24
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 24
- 238000010521 absorption reaction Methods 0.000 claims abstract description 20
- 238000012856 packing Methods 0.000 claims abstract description 13
- 238000002474 experimental method Methods 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 21
- 238000006243 chemical reaction Methods 0.000 claims description 14
- 238000001035 drying Methods 0.000 claims description 12
- 238000004364 calculation method Methods 0.000 claims description 6
- 238000010586 diagram Methods 0.000 claims description 6
- 238000006073 displacement reaction Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 4
- 239000003822 epoxy resin Substances 0.000 claims description 4
- 239000003292 glue Substances 0.000 claims description 4
- 229920000647 polyepoxide Polymers 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000007654 immersion Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 238000004441 surface measurement Methods 0.000 abstract description 3
- 239000011148 porous material Substances 0.000 description 3
- 238000005381 potential energy Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000011449 brick Substances 0.000 description 2
- 239000005357 flat glass Substances 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 238000013501 data transformation Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/02—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by absorbing or adsorbing components of a material and determining change of weight of the adsorbent, e.g. determining moisture content
- G01N5/025—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by absorbing or adsorbing components of a material and determining change of weight of the adsorbent, e.g. determining moisture content for determining moisture content
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/30—Measuring arrangements characterised by the use of mechanical techniques for measuring the deformation in a solid, e.g. mechanical strain gauge
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- Physics & Mathematics (AREA)
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a kind of wall-building brick water swelling deformation dynamics tester and method of testing；The top and bottom of test specimen are respectively equipped with glass amesdial base and glass test piece base in the tester；In the both sides of test specimen, glass amesdial base and glass test piece base distinguish perforate, the position of opening that two quartzy pipe ends are respectively provided at both sides；The first threaded rod is respectively equipped with each quartz ampoule, the first threaded rod is fixedly connected with the first nut and the second nut, the first spring washer, second spring packing ring, quartz ampoule and glass amesdial base and flexible connection is and glass test piece base between；The present invention is immersed in the water the real-time water swelling deflection and water absorption of rear test specimen for dynamic measurement wall-building brick, the problem of surface measurement need to be repeatedly taken out when solution wall-building brick water swelling measurement and water suction measurement, the high accuracy for realizing water absorption behavior curve is continuously measured.
Description
Technical field
The present invention relates to the wet drying shrinkage detection technique field that rises of construction material, more particularly to a kind of wall-building brick water swelling becomes
Shape dynamic test set and method of testing.
Background technology
At this stage, the water swelling rule of wall-building brick can be using the wall-building brick convergent-divergent instrument manual methods equipped with amesdial
Measurement.Existing wall-building brick convergent-divergent instrument is made up of base, test-piece stand, gage frame, amesdial, par etc., and test-piece stand is solid
Base top is scheduled on, test specimen is placed on test-piece stand, gage frame lower section is fixed with amesdial, and gage frame on-fixed is in test-piece stand
On, need to only implement to be enclosed within par or test specimen two ends measuring point during measurement.During measurement wall-building brick water swelling, in test specimen leaching
Instrument origin first is adjusted with the par of wall-building brick convergent-divergent instrument before water, test specimen initial length is then measured, and with electronics day
Flat measurement test specimen initial mass, is then immersed in the water test specimen, at regular intervals, takes out to wipe to face by test specimen from water and does
State (or time draining, such as 1min are fixed to test specimen), repeats to soak with wall-building brick convergent-divergent instrument and electronic balance
Preceding measuring process manual measurement test specimen swell increment and quality, are calculated swell value and moisture content under current state；It is so anti-
Repetition measurement amount, until experiment terminates, then draws water absorption behavior curve according to measurement swell value and moisture content.
Because test specimen is rapid in the water suction of measurement initial stage, surface measurement swell increment and water absorption need to be frequently drawn off, seriously
The water swelling process of test specimen is broken, test specimen saturated dry surface is difficult to grasp during water suction measurement in addition, it is impossible to improve swollen
The accuracy of swollen value and measurement of water ratio, the water absorption behavior curve of drafting is also very coarse, regular unobvious.
The content of the invention
In order to overcome the deficiencies in the prior art, the invention provides a kind of wall-building brick water swelling deformation dynamics tester with
Method of testing；Continuous, automatic, the accurate measurement of water swelling process is realized, eliminate manual measurement error, it is to avoid tradition
It is discontinuous by caused water absorption course in the frequent Water Exit of test specimen in experiment, and caused by experiment initial stage water swelling is too fast
Measure the problem such as inaccurate.
The technical solution adopted in the present invention is：
A kind of wall-building brick water swelling deformation dynamics tester, including amesdial, electronic balance, glass amesdial base,
Quartz ampoule, the first threaded rod, glass test piece base, conversion beam, crossbeam, cistern cover plate, tank box and computer；Tank box sets
There is cistern cover plate, the upper surface and lower surface of the test specimen being arranged in tank box are respectively equipped with upper glass plate and lower glass isolator
Piece；The top and bottom of test specimen are respectively equipped with glass amesdial base and glass test piece base；In the both sides of test specimen, thousand points of glass
Table base and the difference perforate of glass test piece base, the position of opening that two quartzy pipe ends are respectively provided at both sides；Each quartz ampoule
Inside be respectively equipped with the first threaded rod, be all provided with two first threaded rods the first nut and the first spring washer and the second nut and
Second spring packing ring, the first threaded rod is connected on glass amesdial base and glass test piece base；First threaded rod and
One nut and the second nut are fixedly connected, the first spring washer, second spring packing ring, quartz ampoule and glass amesdial base and
Flexible connection is and glass test piece base between；Test specimen lower surface centre drill upright opening, pre-buried test specimen standing screw and center
The lower glass gasket of perforation, test specimen standing screw is fixed in glass test piece base by test specimen fixing nut；Amesdial is fixed
On glass amesdial base, the amesdial head of amesdial is contacted with the upper glass plate of test specimen；Glass amesdial base upper end sets
There is conversion beam, the first threaded rod is connected through glass amesdial base with conversion beam；
Electronic balance is placed on cistern cover plate, crossbeam is placed on electronic balance, crossbeam and conversion beam are by through water
The second threaded rod connection of cover plate, the 3rd nut is connected with the second threaded rod；
The electronic balance connects computer using data wire, and the amesdial connects computer using wireless transmission method；Water
The bottom of box body is provided with Draw off valve.
Gage frame is by amesdial, the first nut, the second nut, the first spring washer, second spring packing ring, thousand points of glass
Table base, quartz ampoule, the first threaded rod, glass test piece base composition.
Further to realize the object of the invention, it is preferable that the material of glass amesdial base is glass, common from 8mm
Glass.
Preferably, the glass amesdial base and glass test piece base sectional dimension are 12mm × 12mm, in the type heart and
At the inside 1cm of two opposite side, the holes of φ 8 are respectively equipped with.
Preferably, the glass amesdial base center is provided with through hole, and bonds amesdial fixture, and fixture fixes thousand points
Table.
Preferably, the amesdial selects electronic dial gauge, more than range 10mm, precision 0.001mm.
Preferably, more than the range 6000g of the electronic balance, accuracy of balance 0.01g.
Preferably, crossbeam is flat stainless steel structure, and width is not less than 30mm, thickness 5mm.
Preferably, upper glass plate and lower glass isolator are fixed in the upper surface and lower surface of test specimen by epoxide-resin glue respectively
Piece.
Using the wall-building brick water swelling deformation dynamics method of testing of the tester, comprise the following steps：
1) adjusted to equilibrium moisture content, the apparent volume V of measurement test specimen in test specimen being placed into experimental situations,0With length l；
2) pull at amesdial to maximum range, the test specimen standing screw insertion glass test piece base center of test specimen bottom
Kong Zhong, screws test specimen fixing nut and fixes test specimen；Electronic dial gauge and electronic balance connection computer, set swell increment and water absorption
Intra-record slack byte, opens automatic record, whole-process automatic record；
3) to added water in water tank glass amesdial base lower section 1cm water levels at；Pass through valve emptying water tank case after experiment
Internal water；Test specimen is removed and be put into drying baker from instrument and is dried to constant weight, measure test specimen absolute dry mass；
The instantaneous reading that electronic dial gauge and electronic balance are gathered respectively is exported to computer automatically, according to formula (1) and (2)
Swell value ε and moisture content W during the difference whole water swelling of calculation testing pieceV,t, and generate swell value and moisture content scatterplot
Figure, forms water swelling indicatrix；
In formula, WV,tIt is the moisture content of test specimen, %；
Vs,0It is the apparent volume of test specimen, measuring and calculation gained, cm before experiment3；
mtp,0At the beginning of test specimen, crossbeam, the electronic balance of the total quality of gage frame under lifting state before test specimen immersion
Beginning reading, g；
mtp,tFor test specimen, crossbeam and gage frame are subject to the electronic balance of the total quality after buoyancy instantaneously to read in experiment
Number, g；
VjThe displacement of volume of gage frame is represented, is three times without the displacement of volume of gage frame under test specimen experimental state
Average value, is constant, cm3；
meqAnd ms,0Quality, g respectively after the aerial poised state quality of test specimen and drying；
ε is test specimen water swelling value, mm/m；
Δ l is the swell increment of test specimen water suction, is instantaneous reading l when electronic dial gauge is testedtWith initial reading leqDifference,
mm；
L is the piece lengths of measurement before experiment, mm；
ltAnd leqInstantaneous reading and electronic dial gauge initial reading, mm when respectively testing.
Compared with prior art, the beneficial effects of the invention are as follows：
1) present invention sets up gauge length alignment system based on quartz ampoule resisting temperature deformation characteristic, solves expansion development
Process continuously dynamically measure in gauge length positioning key issue, be immersed in the water the real-time suction of rear test specimen for dynamic measurement wall-building brick
Water dilatancy amount and water absorption, solve repeatedly take out surface measurement when wall-building brick water swelling measurement and water suction measurement
Problem, the high accuracy for realizing water swelling evolution is continuously measured.
2) present invention is rational in infrastructure, easy to operate, realizes in water to the full-automatic of wall-building brick swell increment and water absorption
Dynamic measurement, measuring accuracy is high, and continuity is good, and the moisture content and expansion rate scatter diagram of generation are water absorption behavior curve,
Without connecting line between drawing data point, measurement result is more accurate, directly perceived.
Brief description of the drawings
Fig. 1 is the structural representation of wall-building brick water swelling deformation dynamics tester of the present invention；
Fig. 2 is conversion beam and crossbeam and the second threaded rod connection diagram in Fig. 1.
Fig. 3 is the gage frame connection diagram in Fig. 1.
Fig. 4 is the test specimen schematic diagram in Fig. 1.
Shown in figure：Amesdial 1, electronic balance 2, the first nut 3-1, the second nut 3-2, the first spring washer 4-1,
Two spring washer 4-2, glass amesdial base 5, quartz ampoule 6, the first threaded rod 7, glass test piece base 8, lower sheet glass 9, examination
Part standing screw 10, test specimen fixing nut 11, upper glass plate 12, conversion beam 13, crossbeam 14, the second threaded rod 14-1, the 3rd spiral shell
Female 14-2, cistern cover plate 15, tank box 16, valve 17, water level 18, test specimen 19, computer 20.
Specific embodiment
To more fully understand the present invention, the present invention is further described below in conjunction with the accompanying drawings, but embodiments of the present invention
Do not limit so.
As Figure 1-4, a kind of wall-building brick water swelling deformation dynamics tester, including amesdial 1, electronic balance 2, glass
Glass amesdial base 5, quartz ampoule 6, the first threaded rod 7, glass test piece base 8, conversion beam 13, crossbeam 14, cistern cover plate 15, water
Box body 16 and computer 20；Tank box 16 is provided with cistern cover plate 15, the upper surface of the test specimen 19 being arranged in tank box 16
Upper glass plate 12 and lower glass gasket 9 are respectively equipped with lower surface；The top and bottom of test specimen 19 are respectively equipped with glass amesdial
Base 5 and glass test piece base 8；In the both sides of test specimen 19, glass amesdial base 5 and glass test piece base 8 distinguish perforate, two
The position of opening that the termination of quartz ampoule 6 is respectively provided at both sides；The first threaded rod 7, two first are respectively equipped with each quartz ampoule 6
The first nut 3-1 and the first spring washer 4-1 and the second nut 3-2 and second spring packing ring 4-2 are all provided with threaded rod 7, will
First threaded rod 7 is connected in glass amesdial base 5 and glass test piece base 8；First spring washer 4-1 and second spring pad
Circle 4-2, quartz ampoule 6, glass amesdial base 5 and glass test piece base 8 are flexibly connected；The lower surface centre drill of test specimen 19 is vertical
The lower glass gasket 9 of hole, pre-buried test specimen standing screw 10 and central hole, test specimen standing screw 10 passes through test specimen fixing nut 11
It is fixed in glass test piece base 8.Amesdial 1 is fixed on glass amesdial base 5, the amesdial head and test specimen of amesdial 1
19 upper glass plate 12 is contacted；Specifically the center of glass amesdial base 5 is provided with through hole, and bonds amesdial fixture, and fixture is solid
Determine amesdial 1.The upper end of glass amesdial base 5 is provided with conversion beam 13, and the first threaded rod 7 is through glass amesdial base 5 and turns
Beam 13 is changed to connect.
Electronic balance 2 is placed on cistern cover plate 15, crossbeam 14, crossbeam 14 and conversion beam 13 are placed on electronic balance 2
Connected by the second threaded rod 14-1 through cistern cover plate 15, be connected with the second threaded rod 14-1 using the 3rd nut 14-2.
Electronic balance 2 connects computer 20 using data wire, and amesdial 1 connects computer 20 using wireless transmission method.
The bottom of tank box 16 is provided with waterproofing valve 17.
Gage frame is by amesdial 1, the first nut 3-1, the second nut 3-2, the first spring washer 4-1, second spring pad
Circle 4-2, glass amesdial base 5, quartz ampoule 6, the first threaded rod 7, glass test piece base 8 are constituted.
In the present invention, amesdial 1 selects electronic dial gauge, preferably more than range 10mm, precision 0.001mm；Using wireless
Transmission data, data realize automatic record.To prevent data wire from producing influence to water suction quality test.The range of electronic balance 2
More than 6000g, accuracy of balance 0.01g, possesses data-transformation facility.
The material of glass amesdial base 5 is glass, from 8mm simple glasses, with not absorbing water, under normal temperature by curved constant
The characteristics of shape, can effectively mitigate quality, glass amesdial base 5 is used to fix amesdial 1.Glass amesdial base 5 and glass
Preferred 12mm × the 12mm of the sectional dimension of test piece base 8, it is each to bore the holes of φ 8 in the type heart and at the inside 1cm of two opposite side.
Crossbeam 14 is flat stainless steel structure, and width is not less than 30mm, thickness 5mm, and long-time stress can be avoided to bend,
Ensure that crossbeam 14 is effectively contacted with balance on goods and services, and the survey for effectively preventing gage frame from swinging in extraneous environmental vibration and causing
Amount error.
The size of electronic balance 2 is larger, and two ends the second threaded rod 14-1 spacing of crossbeam 14 is larger, connects glass amesdial base
5 and glass test piece base 8 the first threaded rod 7 spacing it is smaller, two first threaded rods 7 and two second threaded rod 14-1 without
Method is directly connected to, therefore in centre plus one conversion beam 13.
Test specimen 19 is standard-sized wall-building brick, and size is 240mm*115mm*53mm, or length is the hollow of 240mm
Brick.
To prevent temperature fluctuations affect measurement result during measurement, between glass amesdial base 5 and glass test piece base 8 away from
From must it is invariable, quartz ampoule 6 have minimum temperature linear expansion coefficient, be capable of achieving the function, to reduce measurement error.
First threaded rod 7 is fixedly connected with the first nut 3-1 and the second nut 3-2, the first spring washer 4-1, the second bullet
Spring packing ring 4-2, quartz ampoule 6 and glass amesdial base 5 and flexible connection is and glass test piece base 8 between, constitutes bullet
Property gauge length alignment system, can effectively eliminate the first threaded rod 7 creep and temperature become influence：Glass amesdial base 5 and glass
First spring washer 4-1, the second spring packing ring 4-2 in the outside of test piece base 8 can keep the axial direction of internal side quartz ampoule all the time
Pressure, when the first threaded rod 7 produces spacing between creep glass amesdial base 5 to be increased and glass test piece base 8, first
Spring washer 4-1, second spring packing ring 4-2 can discharge its inner elastomeric potential energy, maintain quartz ampoule 6 to be in pressured state, so that
Distance will not change between stabilized glass amesdial base 5 and glass test piece base 8.When environment temperature is raised, the first threaded rod 7
Elongation, the first spring washer 4-1, second spring packing ring 4-2 will discharge elastic potential energy, act on the He of glass amesdial base 5
The outside of glass test piece base 8, keeps the pressure at the two ends of quartz ampoule 6, stabilization gauge length distance；And work as environment temperature decline, the first spiral shell
Rasp bar 7 shrinks, and the first spring washer 4-1, second spring packing ring 4-2 are pressurized, and elastic potential energy increases, the He of glass amesdial base 5
Glass test piece base 8 still presses to the two ends of quartz ampoule 6, maintains measurement gauge length stabilization.Quartz ampoule of the present invention 6 realize it is real-time from
Calibration, instead of traditional each measurement data of drying shrinkage dilatometer and is both needed to, with the process of par manual calibration, solve water suction swollen
The continuous measurement problem of test specimen swell increment in water in swollen experiment.
Test process of the invention is as follows：
Test specimen makes：As shown in figure 3, in the lower surface center electric drill drill diameter of the long axis direction of test specimen 19 to be measured
The hole of 8mm, deep about 15mm；Powder in cleaning hole, interior filling epoxide-resin glue is fixed in test specimen long axis direction embedment 37mm test specimens long
Screw rod 10；After cementing, with epoxide-resin glue respectively upper and lower end face center bond under sheet glass 9, upper glass plate 12.
Test specimen 19 is adjusted to equilibrium moisture content in placing experimental situation (such as 20 DEG C of temperature, the environment of relative humidity 65%)；
Measure the size and balance state quality of test specimen 19；Pull at amesdial 1 to maximum range, the test specimen of the bottom of test specimen 19 is fixed
In the centre bore of the insertion glass of screw rod 10 test piece base 8, screw test specimen fixing nut 11 and fix test specimen 19；Amesdial 1 and electronics day
Flat 2 connection computer 20 sets swell increment and water absorption intra-record slack byte (such as table 1), opens automatic record, and whole-process automatic record；To
Water level 18 (the lower section 1cm of glass amesdial base 5) place is added water in water tank；By in the emptying tank box 16 of valve 17 after experiment
Water.It is calculation testing piece moisture content, test specimen is removed and be put into drying in (105 ± 5) DEG C drying baker from instrument and, to constant weight, is surveyed
Amount test specimen absolute dry mass.The instantaneous reading that electronic dial gauge and electronic balance are gathered respectively is exported to computer 20 automatically, can basis
The Size calculation of test specimen 19 of measurement goes out during whole water swelling before experiment swell value ε and moisture content WV,t, and generate expansion
Value and moisture content scatter diagram, form water swelling indicatrix.
Aqueous water only substitutes the original air of pore interior, its variable quantity for arranging water volume when being absorbed water based on porous material
The hypothesis of as porous material internal air volume variable quantity has derived moisture content transient state computing formula (WV,t), measuring every time
Without test specimen 19 is taken out water again during water absorption data, manual measurement is carried out with balance, test specimen 19 is expanded and mass change
When, the expansion of automatic record test specimen 19 and mass change are realized water swelling evolution by amesdial 1 and electronic balance 2
The synchronous high-acruracy survey problem of middle test specimen water absorption in water.The moisture content W of test specimen 19V,tRepresented by formula：
In formula, WV,tIt is the moisture content of test specimen 19, %；Vs,0It is the apparent volume of test specimen 19, is surveyed according to straight steel ruler before experiment
Amount data are calculated, cm3；mtp,0Test specimen, crossbeam, the electronics of the total quality of gage frame before being soaked for test specimen under lifting state
Balance initial reading, g；mtp,tFor test specimen, crossbeam and gage frame are subject to the electronic balance of the total quality after buoyancy in experiment
Instantaneous reading, g；VjThe displacement of volume of gage frame is represented, is the displacement of volume without gage frame under test specimen experimental state
Three average values, are constant, cm3；meqAnd ms,0The respectively aerial poised state quality of test specimen 19 and dries quantity, g.
Amesdial changing value is full sized brick water swelling amount, and formula is as follows：
In formula, ε is test specimen water swelling value, mm/m；Δ l is the swell increment of test specimen water suction, when being that electronic dial gauge is tested
Instantaneous reading ltWith initial reading leqDifference, mm；L is piece lengths, is measured with straight steel ruler before experiment, mm；ltAnd leqRespectively
Instantaneous reading and electronic dial gauge initial reading, mm unrelated with test specimen physical length during for test.
Table 1 records time interval and data volume
Test specimen is placed in water the water absorption and swell increment for passing through electronic dial gauge 1 and the automatic measurement test specimen of electronic balance 2,
What is measured after drying is dry quality；Measurement overall process test specimen is in the automatic survey of completion swell increment and water absorption in water
Amount, DATA REASONING interval minimum may be configured as 1s/ times.
In existing drying shrinkage instrument test, because experiment initial stage materials for wall water swelling is rapid, test specimen is needed in frequent Water Exit
Measurement, the quality error for wiping surface dry condition generation is also larger, has seriously broken the normal water swelling process of test specimen, have impact on
Water swelling rule, it is impossible to improve the accuracy of measurement.The expansion that prior art is measured using artificial water swelling experimental technique
Process is extremely coarse, and not reaching far carries out the degree of accurate description to its rule.Existing drying shrinkage instrument only measures deflection
Simple function.During measurement water swelling test specimen mass change, it is necessary to unload test specimen from drying shrinkage measuring instrument and use balance measurement,
Materials for wall water swelling experiment dynamic measurement and the requirement of record cannot be met.
And apparatus of the present invention possess the function of synchronization dynamic measurement swell increment and water absorption.Whole measurement process is without frequently
Ground dismounting test specimen, realizes the real-time water absorption and swell value that test specimen is automatically and continuously recorded in water, eliminates manual measurement
Error, it is to avoid test specimen water absorption course is discontinuous caused by measurement, also solves the experiment initial stage because test specimen water swelling is too fast
The measurement problem for causing.
The water swelling process of test specimen of the present invention and water absorption and the synchro measure recording process Complete Synchronization of swell increment, protect
The continued integrity and accuracy of water swelling process data are demonstrate,proved.
Claims (9)
1. a kind of wall-building brick water swelling deformation dynamics tester, it is characterised in that：Including amesdial, electronic balance, glass thousand
Divide table base, quartz ampoule, the first threaded rod, glass test piece base, conversion beam, crossbeam, cistern cover plate, tank box and computer；
Tank box is provided with cistern cover plate, the upper surface and lower surface of the test specimen being arranged in tank box be respectively equipped with upper glass plate and
Lower glass gasket；The top and bottom of test specimen are respectively equipped with glass amesdial base and glass test piece base；In the both sides of test specimen,
Glass amesdial base and the difference perforate of glass test piece base, the position of opening that two quartzy pipe ends are respectively provided at both sides；Often
The first threaded rod is respectively equipped with individual quartz ampoule, the first nut and the first spring washer and are all provided with two first threaded rods
Two nuts and second spring packing ring, the first threaded rod is connected on glass amesdial base and glass test piece base；First spiral shell
Rasp bar is fixedly connected with the first nut and the second nut, thousand points of the first spring washer, second spring packing ring, quartz ampoule and glass
Table base and flexible connection is and glass test piece base between；Test specimen lower surface centre drill upright opening, pre-buried test specimen fixes spiral shell
The lower glass gasket of bar and central hole, test specimen standing screw is fixed in glass test piece base by test specimen fixing nut；Thousand
Table is divided to be fixed on glass amesdial base, the amesdial head of amesdial is contacted with the upper glass plate of test specimen；Glass amesdial bottom
Seat upper end is provided with conversion beam, and the first threaded rod is connected through glass amesdial base with conversion beam；
Electronic balance is placed on cistern cover plate, crossbeam is placed on electronic balance, crossbeam and conversion beam are by through tank lid
The second threaded rod connection of plate, the 3rd nut is connected with the second threaded rod；
The electronic balance connects computer using data wire, and the amesdial connects computer using wireless transmission method；Water tank case
The bottom of body is provided with Draw off valve.
2. wall-building brick water swelling deformation dynamics tester according to claim 1, it is characterised in that：Glass amesdial bottom
The material of seat is glass, from 8mm simple glasses.
3. wall-building brick water swelling deformation dynamics tester according to claim 1, it is characterised in that：Thousand points of the glass
Table base and glass test piece base sectional dimension are 12mm × 12mm, in the type heart and at the inside 1cm of two opposite side, are respectively equipped with φ
8 holes.
4. wall-building brick water swelling deformation dynamics tester according to claim 1, it is characterised in that：Thousand points of the glass
Table base center is provided with through hole, and bonds amesdial fixture, and fixture fixes amesdial.
5. wall-building brick water swelling deformation dynamics tester according to claim 1, it is characterised in that：The amesdial choosing
With electronic dial gauge, more than range 10mm, precision 0.001mm.
6. wall-building brick water swelling deformation dynamics tester according to claim 1, it is characterised in that：The electronic balance
More than range 6000g, accuracy of balance 0.01g.
7. wall-building brick water swelling deformation dynamics tester according to claim 1, it is characterised in that：Crossbeam is flat
Stainless steel structure, width is not less than 30mm, thickness 5mm.
8. wall-building brick water swelling deformation dynamics tester according to claim 1, it is characterised in that：The upper surface of test specimen
Upper glass plate and lower glass gasket are fixed by epoxide-resin glue respectively with lower surface.
9. using the wall-building brick water swelling deformation dynamics method of testing of tester described in claim 1, it is characterised in that including
Following steps：
1) adjusted to equilibrium moisture content, the apparent volume V of measurement test specimen in test specimen being placed into experimental situations,0With length l；
2) pull at amesdial to maximum range, the test specimen standing screw of test specimen bottom is inserted glass test piece base centre bore
In, screw test specimen fixing nut and fix test specimen；Electronic dial gauge and electronic balance connection computer, set swell increment and water absorption note
Record interval, opens automatic record, whole-process automatic record；
3) to added water in water tank glass amesdial base lower section 1cm water levels at；By in valve emptying tank box after experiment
Water；Test specimen is removed and be put into drying baker from instrument and is dried to constant weight, measure test specimen absolute dry mass；
The instantaneous reading that electronic dial gauge and electronic balance are gathered respectively is exported to computer automatically, according to formula (1) and (2) respectively
Swell value ε and moisture content W during the whole water swelling of calculation testing pieceV,t, and generate swell value and moisture content scatter diagram, shape
Into water swelling indicatrix；
In formula, WV,tIt is the moisture content of test specimen, %；
Vs,0It is the apparent volume of test specimen, measuring and calculation gained, cm before experiment3；
mtp,0It is the electronic balance initial reading of the total quality of test specimen, crossbeam and gage frame under lifting state before test specimen immersion,
g；Gage frame is by amesdial, the first nut, the second nut, the first spring washer, second spring packing ring, glass amesdial bottom
Seat, quartz ampoule, the first threaded rod, glass test piece base composition.
mtp,tFor test specimen, crossbeam and gage frame are subject to the electronic balance instantaneous reading of the total quality after buoyancy, g in experiment；
VjThe displacement of volume of gage frame is represented, is average without three times of the displacement of volume of gage frame under test specimen experimental state
Value, is constant, cm3；
meqAnd ms,0Quality, g respectively after the aerial poised state quality of test specimen and drying；
ε is test specimen water swelling value, mm/m；
Δ l is the swell increment of test specimen water suction, is instantaneous reading l when electronic dial gauge is testedtWith initial reading leqDifference, mm；
L is the piece lengths of measurement before experiment, mm；
ltAnd leqInstantaneous reading and initial reading, mm when respectively electronic dial gauge is tested.
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