CN108254536A - Bellows encapsulation plug, concrete self-shrinkage test device and method using it - Google Patents
Bellows encapsulation plug, concrete self-shrinkage test device and method using it Download PDFInfo
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- CN108254536A CN108254536A CN201711361297.4A CN201711361297A CN108254536A CN 108254536 A CN108254536 A CN 108254536A CN 201711361297 A CN201711361297 A CN 201711361297A CN 108254536 A CN108254536 A CN 108254536A
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- 238000012360 testing method Methods 0.000 title claims abstract description 108
- 238000005538 encapsulation Methods 0.000 title claims abstract description 93
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000009423 ventilation Methods 0.000 claims abstract description 20
- 239000011148 porous material Substances 0.000 claims description 19
- 238000010276 construction Methods 0.000 claims description 13
- 238000006073 displacement reaction Methods 0.000 claims description 10
- 239000004033 plastic Substances 0.000 claims description 8
- 229920003023 plastic Polymers 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 239000003570 air Substances 0.000 description 36
- 238000010586 diagram Methods 0.000 description 13
- 230000000694 effects Effects 0.000 description 10
- 239000002689 soil Substances 0.000 description 5
- 230000015271 coagulation Effects 0.000 description 4
- 238000005345 coagulation Methods 0.000 description 4
- 238000005336 cracking Methods 0.000 description 4
- 238000010998 test method Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229920001684 low density polyethylene Polymers 0.000 description 2
- 239000004702 low-density polyethylene Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000000452 restraining effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- -1 Polyethylene Polymers 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000012502 risk assessment Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/38—Concrete; Lime; Mortar; Gypsum; Bricks; Ceramics; Glass
- G01N33/383—Concrete or cement
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- Ceramic Engineering (AREA)
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Abstract
The invention discloses a kind of bellows encapsulation plug, concrete self-shrinkage test devices and method using it.Test device of the present invention includes bellow mold and encapsulation plug；The bellow mold include potted ends, ripple and ripple away from；The encapsulation plug includes disc disk, ghost, embedded part, connecting cylinder, rubber stopper, stock plug and ventilation nozzle.The present invention solves the test error that the plug occurred in the concrete self-shrinkage test under high temperature or temperature match curing conditions is brought with bellow mold relative movement；Solve the problems, such as that plug is detached from concrete sample；Solves exhausting problem during plug seal bellows mold；Solve influence of the bellow mold internal pressure variation to test result；The friction for solving the problems, such as bellow mold and test bracket carrys out error to calibration tape.The present invention provides a kind of science, reliable technical solution and technical method for concrete self-shrinkage test, has good operability.
Description
Technical field
The present invention relates to concrete test technical fields, and in particular to a kind of bellows encapsulation plug, the coagulation using it
Native self-constriction test device and method.
Background technology
It is also gradually deep to the research of concrete performance in the industry with the development of domestic and international various large scale civil engineerings
Enter, an important means of testing as concrete performance is tested in the self-constriction of concrete, and the self-constriction index of concrete can be with
To concrete structure cracking resistance evaluation provide foundation, while be also concrete structure cracking risk assessment in stress field and
The important evidence that cracking risk calculates.
At present, there are many ways to concrete self-shrinkage is tested, but in the world, ripple tube method is widely recognized as one kind
One of relatively reasonable test method, the present inventor Tian Qian is once 2009 and the JENSEN Ole of Denmark University of Science and Technology
Mejlhede exists《Silicate journal》On delivered " using bellows test cement-based material Early self-shrinkage method ", discuss
The reliability and theoretical foundation of ripple tube method test, the same year, the test method are used by Unite States Standard ASTM C1698, and field is pretty etc.
Also patent " CN200610038892.X early self-deformation of concrete test method and device " has been declared, which realizes
Concrete is condensing and concrete initial set after self-desiccation shrinkage test；One of the present inventor Zhang Jianliang is to ripple
The test device of tube method has done further improvement, and obtaining patent, " CN201420842970.1 bellowss encapsulate end and make
With its cement-based material self-constriction measurement device ", but there are still some problems, such as the use environment temperature of test method is
20 DEG C, and inconvenient, plug may be detached from concrete, plug may generate relative displacement with mold, in mold in the presence of being vented
The problems such as air pressure change causes mold to generate restraining force to concrete sample.Concrete can not in 20 DEG C of self-constriction index
Meets the needs of research now and engineering, in the assessment of concrete structure cracking risk, in order to obtain more accurate simulation knot
Fruit and assessment result need to establish varying temperature environment as test wrapper according to the change procedure in the temperature field of practical structures concrete
The self-constriction of concrete is tested in border under this temperature match curing conditions.In this case, due to deformation that Plastic cap is affected by temperature
It is larger, it has not applied to, the deformation of concrete sample is bigger than the change rate under normal temperature environment, and concrete is before and after final set, ripple
The friction of pipe mold and test bracket is very important, be affected by temperature inside bellow mold with concrete sample deformation effect and
Generation air pressure change is also larger, and such as these factors can bring large effect to test result.
Therefore, it is necessary to design a kind of technical solution and technical method that can solve above-mentioned a series of problems, the present invention carries
The bellow mold and encapsulation plug and its application method of a kind of test concrete self-shrinkage supplied then provide good solution
Scheme.
Invention content
When using ripple tube method test concrete self-shrinkage, there are following problems：Encapsulate plug and ripple pipe die
Signing an undertaking, it is not close to close；Concrete will appear the phenomenon that encapsulation plug is detached from concrete sample during expansion or shrinkage；With
Past Plastic cap (ASTM C1698) is larger by the deformation effect of temperature change, is not suitable for the test wrapper of high temperature or alternating temperature
Border；When encapsulating plug with bellow mold cooperation, internal gas is difficult to exclude；Test the Early self-shrinkage of concrete sample
When, the length variation or the variation of environment temperature of bellow mold lead to the air pressure change of its inside, and the variation of air pressure makes ripple
Pipe mold generates restraining force to the deformation of concrete sample, and inaccuracy is tested so as to cause the Early self-shrinkage of concrete sample；
In the Early self-shrinkage for testing concrete sample, the frictional force between previous bellow mold and test bracket can cause to mix
The error that the generation degree of solidifying soil test data differs.In order to solve these problems, the present invention provides a kind of encapsulation of bellows
Plug, concrete self-shrinkage test device and method using it, are specifically realized in：
A kind of bellows encapsulates plug, including disc disk, ghost, embedded part, connecting cylinder, stock plug or ventilation nozzle, rubber stopper,
Air bag and plastic tube；
The disc disk is pied geometry, and disc disk is equipped with venthole and disk hole, and venthole is located at 12 points of disc disk
Zhong Weizhichu, disk hole are located at 6 o-clock position of disc disk；
The embedded part includes embedded part disk and screw rod；
The ghost is with 2~4 ° of cup body structure, including rim of a cup, wall of cup and bottom of a cup, the ghost and disc disk jail
Gu cooperation forms hollow-core construction in inside；The rim of a cup diameter is more than bottom of a cup diameter, and embedded part is equipped on the outside of the bottom of a cup of the ghost
Slot, the embedded part slot are capable of the thread fitting of disassembled and assembled freely with the formation of embedded part disk；The wall of cup of the ghost is equipped with dise knife, ghost
Bottom of a cup be equipped with ghost hole, for the edge of a knife of dise knife towards disc disk, ghost hole is located at 12 o-clock position of cup body bottom surface；
The ghost bore dia 1~2mm small compared with venthole, ghost hole are located at same axis with venthole and are connected by connecting cylinder
Logical, the diameter of the connecting cylinder is consistent with venthole, and the structure connected that venthole, connecting cylinder and ghost hole form is connection
Hole, intercommunicating pore are not connected with the hollow-core construction, and disk hole is connected with the hollow-core construction, and rubber stopper can pass through the cup of ghost
Ghost hole is blocked on the outside of bottom, stock plug can be inserted into intercommunicating pore by venthole, and ghost hole is blocked；
The ventilation nozzle includes rubber mouth and rubber tube, and the rubber mouth is formed with the ghost hole is capable of disassembled and assembled freely
Cooperation；
The air bag is connect by plastic tube with venthole, and the volume of air bag in a free state is 50~100cm3；
The stock plug include stock and T-shaped rubber stopper, T-shaped rubber stopper front end can run through ghost hole and with ghost hole shape
Into tight fit, the T-shaped rubber stopper includes barrel shape slot and chock plug, when stock plug is passed through from venthole and connecting cylinder by ghost hole
When blocking, chock plug coordinates with ghost hole, and the length of chock plug is not less than the length in ghost hole, and barrel shape slot gets lodged in ghost hole and connecting cylinder
Intersection, realize more preferably sealing effect.
A diameter of 5~the 8mm of venthole, disk bore dia are 1~2mm；
The rubber stopper is that ghost hole is blocked on the outside of the bottom of a cup of ghost, is a kind of short rubber plug, the length of 4~8mm,
The T-shaped rubber stopper is inserted into from venthole, is again blocked ghost hole across connecting cylinder, the chock plug length of T-shaped rubber stopper is not small
Length in ghost hole.
It is a kind of using the bellows encapsulation plug concrete self-shrinkage test device, including bellows encapsulate plug and
Bellow mold, the quantity of the bellows encapsulation plug is two；The bellow mold includes potted ends, ripple and ripple
Away from；The potted ends are located at the both ends of bellow mold, the part for being bellow mold with encapsulation plug cooperation, potted ends it is interior
Diameter sets 2~4 ° of taper, and the internal diameter in the outside of potted ends is more than the internal diameter of inside, and the waviness width b is 5~10mm, ripple
Away from being coupling part between two ripples, ripple away from width a be 1~2mm.
In order to ensure bellow mold will not generate constraint, the material of the bellow mold to the early deformation of concrete
It is density in 0.90~0.92g/cm3Polyethylene, and bellow mold stretch in a free state 3mm and compression 3mm used in
Power no more than 20mN.
When encapsulating plug with bellow mold cooperation, the edge of a knife of the dise knife is against the inner wall of potted ends, blocks up encapsulation
Head can not be exited from the potted ends of bellow mold, and therefore, the encapsulation plug can be installed with potted ends formation but nothing
The cooperation of method dismounting.
When carrying out the test of concrete self-shrinkage in the high temperature environment or in varying temperature environment, the hollow knot of the encapsulation plug
Gas inside structure will generate air pressure change, and the effect in disk hole is to ensure that the gas in the hollow-core construction is flowed into or flowed
Going out, it is ensured that the air pressure of the hollow-core construction is equal to ambient air pressure, in case the air pressure change of the hollow-core construction causes to seal
The volume change of plug carrys out error to calibration tape.
The encapsulation plug is used to encapsulate the potted ends at bellow mold both ends, and the encapsulation plug of one end is fixed, and is tested
The other end encapsulates the change in displacement of plug disc disk.The securing mode of encapsulation plug of one end is magnetic connection, therefore is encapsulated
The material of plug is the metal material with magnetic property.
The screw rod set in the encapsulation plug can be closely linked with the concrete sample in bellow mold,
Encapsulation plug is made to form an entirety with concrete sample, in case in deformation test, especially in the test of alternating temperature, coagulation
Soil sample is detached from encapsulation plug.
The application method of a kind of concrete self-shrinkage test device using bellows encapsulation plug, when only test is hard
When changing the self-constriction of concrete, including：
(1) the ghost hole of one encapsulation plug is blocked using rubber stopper, makes the envelope of the encapsulation plug and bellow mold
End cooperation is filled, and is pressed close；
(2) openend of bellow mold is erected vertically upward, the concrete sample newly mixed and stirred is poured into ripple pipe die
In tool, when at the encapsulation end position of concreting to top, stop pouring, then take an encapsulation plug and bellow mold
Potted ends be fitted close, the gas in bellow mold is discharged by intercommunicating pore, and stock plug then is passed through venthole and company
Connect cylinder seals ghost hole；
(3) after the hardening of fresh concrete sample, concrete sample, bellow mold and encapsulation plug form one kind can be straight
The hardening sample tested for self-constriction is connect, the screw rod of the embedded part is embedded in concrete sample, embedded part and concrete sample
Securely non-removable cooperation is formed, during test, one end of the hardening sample is fixed, other end of displacement is tested and becomes
Change, after test, plane opens the potted ends of bellow mold, and the disc disk and ghost that encapsulate plug are backed out, and embedded part is still with mixing
Solidifying soil sample is combined together, then new embedded part and the embedded part slot of the ghost is taken to form thread fitting, and remaining test next time makes
With.
The application method of a kind of concrete self-shrinkage test device using bellows encapsulation plug, when test coagulation
Soil sample by plasticity to hardening phase self-constriction when, including：
(1) an encapsulation plug is taken, its ghost hole is blocked using rubber stopper, another is taken to encapsulate plug, by ventilation nozzle
Its ghost hole is installed on, air bag is installed on its venthole；By the encapsulation plug blocked with rubber stopper and the one of bellow mold
End cooperation, and press close；
(2) openend of bellow mold is erected vertically upward, the concrete sample newly mixed and stirred is poured into ripple pipe die
In tool, when concrete sample is poured to 10~15mm of potted ends apart from top, it will be mounted with the envelope of ventilation nozzle and air bag
The potted ends for filling plug and bellow mold top coordinate, and the rubber tube of ventilation nozzle are butted on nearest apart from top potted ends
It is at first segment or the second section ripple, encapsulation plug pressing is close, then the bellow mold of concrete sample will have been contained gently
It being laid flat, and ensures that venthole is located at the position of 12 o'clock direction, gently vibrations make concrete sample levelling in bellow mold,
The gas in bellow mold is squeezed to bellow mold top simultaneously, the sky that each ripple of bellow mold passes through top
Gas connects, and the ripple of bellow mold is connected also through intercommunicating pore with air bag, encapsulation plug, bellow mold, air bag and coagulation
Soil sample forms a kind of plasticity sample that can be directly used for the test of concrete Early self-shrinkage；
(3) in the Early self-shrinkage for testing concrete sample, the plasticity sample is lifted, and one end is fixed, and test is another
The change in displacement of one end；During the test, air bag generates volume with the length variation and the variation of temperature of bellow mold
Variation, so as to which the air pressure inside bellow mold be made to be consistently equal to ambient pressure；
(4) after testing, plane opens the potted ends of bellow mold, and the disc disk and ghost that encapsulate plug are backed out, buried
Part is still combined together with concrete sample, then new embedded part and the embedded part slot of ghost is taken to form thread fitting, remains next survey
Examination uses.
During test, described by concrete sample one end fixed mode is magnetic connection, magnetic suction disc and encapsulation plug
Disc disk coordinates, and realizes effective, convenient mode of operation.
The plasticity sample is sling by chain sling, and chain sling is hung on test bracket, the ripple away from the impetus to be lifted,
The hardening sample also can be used the method sling and be tested.
Other than method used above, other testing elements, such as temperature tube sensor, capillary negative pressure can also be visited
Head etc., is buried by the intercommunicating pore into concrete sample, carries out the performance parameter of test concrete sample.
Beneficial effects of the present invention：
(1) encapsulation plug of the invention is equipped with dise knife, it can be ensured that encapsulation plug is tightly combined with bellow mold；
(2) encapsulation plug of the invention is equipped with embedded part, and the screw rod of embedded part can be closely linked with concrete sample,
It can ensure that concrete sample will not be detached from during expansion or shrinkage with encapsulation plug；
(3) present invention uses hollow Metal Packaging plug, can be suitble to concrete sample in the environment of high temperature or alternating temperature
Test；
(4) encapsulation plug of the invention is equipped with intercommunicating pore, can easily discharge the gas inside bellow mold；
(5) intercommunicating pore of encapsulation plug of the invention can connect air bag, make to connect with air bag inside bellow mold, can
Ensure that the air pressure in bellow mold is consistently equal to external atmosphere pressure, avoid the test results such as air pressure change in bellow mold
Influence；
(6) ripple of bellow mold of the invention equipped with 1~2mm is away from as impetus when being lifted, the i.e. present invention
Molding die be the bellow mold that can be sling, when bellow mold is lifted, be completely eliminated bellow mold with survey
Try the frictional force between stent.
Description of the drawings
Fig. 1 is the schematic diagram that bellow mold encapsulates concrete with encapsulating plug
Fig. 2 is the schematic diagram of bellow mold and encapsulation plug encapsulation concrete that air bag is configured
Fig. 3 is the application method schematic diagram that bellow mold is lifted
Fig. 4 is the assembling structure schematic diagram of disc disk, ghost, embedded part and connecting cylinder
Fig. 5 is embedded parts structure schematic diagram
Fig. 6 is bellows structure schematic diagram
Fig. 7 is stock plug structure schematic diagram
Fig. 8 is hollow shell structure schematic diagram
Fig. 9 is T-shaped rubber plug structure schematic diagram
Figure 10 is ventilation nozzle structure diagram
Figure 11 is to harden the structure diagram that sample removes encapsulation plug
Figure 12 is the structure diagram of dismounting encapsulation plug after the hardening of plasticity sample
Figure 13 is the assembling structure left hand view schematic diagram of disc disk, ghost, embedded part and connecting cylinder
Fig. 1~Figure 13's is respectively labeled as：1 encapsulation plug, 11 disc disks, 111 disk holes, 112 ventholes, 12 ghosts, 121
Wall of cup, 1211 dise knifes, 122 bottom of a cup, 1221 embedded part slots, 1222 ghost holes, 123 rims of a cup, 13 embedded parts, 131 embedded part disks, 132 screw rods,
14 connecting cylinders, 15 rubber stoppers, 16 stock plugs, 161 stocks, 162T types rubber stopper, 1621 barrel shape slots, 1622 chock plugs, 17 ventilation nozzles,
171 rubber mouths, 172 rubber tubes, 18 hollow-core constructions, 2 bellow molds, 21 potted ends, 22 ripples, 23 ripples are away from the examination of, 3 concrete
Sample, 4 air bags, 41 plastic tubes, 5 test brackets, 51 chain slings, 52 magnetic suction discs.
Specific embodiment
The bellow mold 2 for testing concrete self-shrinkage includes potted ends 21, ripple 22 and ripple away from 23, potted ends 21
In the both ends of bellow mold 2, it is the part that bellow mold 2 coordinates with encapsulation plug 1,4 ° of taper is set in potted ends 21,
The width b of ripple 22 is 8mm, and ripple is 1mm away from 23 width a away from the coupling part that 23 be between two ripples 22, ripple.
In order to ensure bellow mold 2 will not generate constraint, the bellow mold to the early deformation of concrete sample 3
2 material is low density polyethylene (LDPE), and the power that bellow mold 2 stretches 3mm and compresses used in 3mm in a free state is little
In 20mN.
The encapsulation plug 1 for testing concrete self-shrinkage includes disc disk 11, ghost 12, embedded part 13, connecting cylinder 14, rubber stopper
15th, stock plug 16 and ventilation nozzle 17, disc disk 11 are pied geometry, and ghost 12 is with 4 ° of cup body structure, including rim of a cup
123rd, wall of cup 121 and bottom of a cup 122, ghost 12 and 11 secure fit of disc disk form hollow-core construction 18, the cup of ghost 12 in inside
Body outer side bottom surface is equipped with embedded part slot 1221, and embedded part 13 forms the thread fitting for being capable of disassembled and assembled freely, disc disk with embedded part slot 1221
11 are equipped with venthole 112 and disk hole 111, and venthole 112 is located at 1112 o-clock position of disc disk, and disk hole 111 is located at
116 o-clock position of disc disk, is additionally provided with dise knife 1211 and ghost hole 1222 in ghost 12, and the edge of a knife of dise knife 1211 is towards disk
Face, ghost hole 1222 are located at 12 o-clock position of cup body bottom surface, and 1222 diameter of ghost hole is compared with 112 small 1.5mm of venthole, ghost hole
1222 are located at same axis with venthole 112 and are connected by connecting cylinder 14,1222 groups of venthole 112, connecting cylinder 14 and ghost hole
Into connection structure for intercommunicating pore, intercommunicating pore is not connected with the hollow-core construction 18, disk hole 111 and the hollow-core construction 18
Connection, rubber stopper 15 can be blocked ghost hole 1222 by 12 outside of ghost, and stock plug 16 can be inserted by venthole 112
Enter, and ghost hole 1222 is blocked.
The edge of a knife of the dise knife 1211 is against the inner wall of potted ends 21, makes encapsulation plug 1 can not be from the envelope of bellow mold 2
Dress end 21 is exited, therefore, the cooperation that the encapsulation plug 1 can be installed but can not be dismantled with the potted ends 21 formation；Two
Encapsulation plug 1 encapsulates the potted ends 21 at 2 both ends of bellow mold.
112 a diameter of 6mm of venthole, disk hole 111 are diameter 2mm.
The stock plug 16 includes stock 161 and T-shaped rubber stopper 162, and T-shaped 162 front end of rubber stopper can be just through sky
Housing hole 1222 simultaneously forms tight fit with ghost hole 1222, and T-shaped rubber stopper 162 includes barrel shape slot 1621 and chock plug 1622, works as length
Bar plug 16 is passed through from venthole 112 and connecting cylinder 14 when ghost hole 1222 is blocked, chock plug 1622 with ghost hole 1222 is coordinated,
Barrel shape slot 1621 gets lodged in the intersection of ghost hole 1222 and connecting cylinder 14, realizes more preferably sealing effect.
The material of the encapsulation plug 1 is the metal material with magnetic property.
The ventilation nozzle 17 includes rubber mouth 171 and rubber tube 172, and rubber mouth 171 forms energy with the ghost hole 1222
The cooperation of enough disassembled and assembled freelies.
The embedded part 13 includes embedded part disk 131 and screw rod 132, and embedded part disk 131 forms screw thread with the embedded part slot 1221 and matches
It closes, screw rod 132 can be closely linked with concrete sample 3, make encapsulation plug 1 and the formation of concrete sample 3 one whole
Body, in order to avoid in deformation test, especially in the test of alternating temperature, concrete sample 3 is detached from encapsulation plug 1.
A kind of application method of the bellow mold 2 for testing concrete self-shrinkage and encapsulation plug 1, it is characterised in that including
Following two application methods：
The first application method：It is using rubber stopper 15 that an encapsulation is stifled when the only self-constriction of test maturing
First 1 ghost hole 1222 is blocked, and coordinates the potted ends 21 of the encapsulation plug 1 and bellow mold 2, and is pressed close；By wave
The openend of line pipe mold 2 erects vertically upward, and the concrete sample 3 newly mixed and stirred is poured into bellow mold 2, works as concrete
When pouring to 21 position of potted ends on top, stop pouring, then take the potted ends of an encapsulation plug 1 and bellow mold 2
21 are fitted close, and the gas in bellow mold 2 is discharged by intercommunicating pore, and stock plug 16 then is passed through venthole 112 and is connected
Connect cylinder 14 seals ghost hole 1222, and after fresh concrete sample 3 hardens, concrete sample 3, bellow mold 2 and encapsulation are stifled
First 1 forms a kind of hardening sample that can be directly used for self-constriction test, and the screw rod 132 of the embedded part 13 is embedded in concrete examination
In sample 3, embedded part 13 and concrete sample 3 form secured non-removable cooperation, and during test, one end of the hardening sample is consolidated
It is fixed, other end of change in displacement is tested, after test, plane opens the potted ends 21 of bellow mold 2, will encapsulate plug 1
Disc disk 11 and ghost 12 are backed out, and embedded part 13 is still combined together (Figure 11) with concrete sample 3, then take new embedded part 13 and institute
The embedded part slot 1221 for stating ghost 12 forms thread fitting, remains test next time and uses；
Second of application method：When testing self-constriction of the concrete sample 3 by plasticity to hardening phase, an encapsulation is taken
Plug 1 is blocked its ghost hole 1222 using rubber stopper 15, another is taken to encapsulate plug 1, and ventilation nozzle 17 is pressed loaded on its ghost
Air bag 4 is installed on its venthole 112 by hole 1222；By the encapsulation plug 1 blocked with rubber stopper 15 and the one of bellow mold 2
End cooperation, and press close；The openend of bellow mold 2 is erected vertically upward, the concrete sample 3 newly mixed and stirred is poured into
In bellow mold 2, when concrete sample 3 is poured to the potted ends 2110mm apart from top, it will be mounted with ventilation nozzle 17
Coordinate, and the rubber tube 172 of ventilation nozzle 17 is butted on the encapsulation plug 1 and the potted ends 21 on 2 top of bellow mold of air bag 4
At the first segment ripple 22 nearest apart from top potted ends 21, encapsulation plug 1 is pressed closely, then will contain concrete sample
3 bellow mold 2 is gently laid flat, and ensures that venthole 112 is located at the position of 12 o'clock direction, and gently vibrations try concrete
The levelling in bellow mold 2 of sample 3, while the gas in bellow mold 2 is squeezed to 2 top of bellow mold, bellows
Each ripple 22 of mold 2 is connected by the air communication on top, the ripple 22 of bellow mold 2 also through intercommunicating pore and air bag 4
Logical, encapsulation plug 1, bellow mold 2, air bag 4 and concrete sample 3 form one kind and can be directly used for concrete early stage from receipts
Contract the plasticity sample tested；In the Early self-shrinkage for testing concrete sample 3, the plasticity sample is lifted, and one end is fixed,
Test the change in displacement of the other end；During the test, air bag 4 is with the length variation and the variation of temperature of bellow mold 2
Volume change is generated, so as to which the air pressure inside bellow mold 2 be made to be consistently equal to ambient pressure；After test, plane opens ripple
The potted ends 21 of pipe mold 2 back out the disc disk 11 for encapsulating plug 1 and ghost 12, and embedded part 13 is still combined with concrete sample 3
(Figure 12) together, then new embedded part 13 and the embedded part slot 1221 of ghost 12 is taken to form thread fitting, it remains test next time and uses.
During test, the fixed mode in sample one end that will harden is magnetic connection, magnetic suction disc 52 and encapsulation plug 1
Disc disk 11 coordinates, and realizes effective, convenient mode of operation.
The plasticity sample is sling by chain sling 51, and chain sling 51 is hung on test bracket 5, and the ripple is lifted away from 23
Impetus, the hardening sample also can be used the method sling and tested.
The air bag 4 is connect by plastic tube 41 with venthole 112, and the volume of air bag 4 in a free state is 80cm3。
Other than method used above, other testing elements can be also buried by the intercommunicating pore to concrete sample 3
In, carry out test concrete sample 3 performance parameter.
Embodiment 1
C60 concrete is tested since to the self-constriction of 28 day age, the internal diameter of bellow mold is 58mm, outer diameter final set
Outer 80mm, the width of the ripple of bellows are 8mm, ripple away from width be 1mm, bellow mold stretches in a free state
Power used in 3mm and compression 3mm is respectively 16mN and 18mN, and experimental test environment is alternating temperature, and alternating temperature process is from 20 DEG C of processes 25
Hour rises to 65 DEG C, and 20 DEG C had been down to by 100 hours.An encapsulation plug is taken, rubber stopper will be used, ghost hole is blocked, made
Its one end fits with bellow mold, and press closely, the encapsulation plug cannot exit bellow mold at this time, by ripple
The openend of pipe mold erects vertically upward, and the C60 concrete samples newly mixed and stirred are poured into bellow mold, when concrete pours
When building to the encapsulation end position on top, stop pouring, then the potted ends of an encapsulation plug and bellow mold is taken closely to match
It closes, the gas in bellow mold is discharged by intercommunicating pore, is then sealed the intercommunicating pore of the encapsulation plug using stock plug, newly
After mixed concrete sample final set, the bellow mold of concrete sample will be encapsulated, that is, harden sample, be directly used in self-constriction survey
Examination.Test result shows the effect due to embedded part, does not occur to encapsulate the phenomenon that plug is detached from concrete sample, due to dise knife
Effect, the potted ends for not occurring to encapsulate plug and bellow mold lead to the problem of relative movement, realize good test
Effect.
After test, plane opens the potted ends of bellow mold, the disc disk and ghost that encapsulate plug is backed out, embedded part is still
It is combined together with concrete sample, then new embedded part is taken to be screwed on embedded part slot, remained test next time and use.
Embodiment 2
Test the Early self-shrinkage of C50 concrete, the internal diameter of bellow mold is 58mm, the outer 80mm of outer diameter, bellows
The width of ripple is 8mm, ripple away from width for 1mm, bellow mold is stretched in a free state used in 3mm and compression 3mm
Power be 16mN, test environment temperature is 35 DEG C.An encapsulation plug is taken, is blocked its ghost hole using rubber stopper, is taken another
One encapsulation plug, ventilation nozzle is pressed loaded on its ghost hole, air bag is installed on its venthole；The encapsulation that will be blocked with rubber stopper
The one end fits of plug and bellow mold, and press close；The openend of bellow mold is erected vertically upward, will newly be mixed
The concrete sample of sum is poured into bellow mold, will when concrete sample is poured to the potted ends 10mm apart from top
It is mounted with that ventilation nozzle and the encapsulation plug of air bag coordinate, and the rubber tube of ventilation nozzle is supported with the potted ends on bellow mold top
It is at the first segment ripple nearest apart from top potted ends, encapsulation plug pressing is close, then concrete sample will have been contained
Bellow mold is gently laid flat, and ensures that venthole is located at the position of 12 o'clock direction, and gently vibrations make concrete sample in wave
Levelling in line pipe mold, while the gas in bellow mold is squeezed to bellow mold top, bellow mold it is each
Ripple forms plasticity sample by the air communication on top；Using the test bracket that can hang chain sling, plasticity sample is sling, one
Encapsulation plug is sucked using magnetic suction disc in end, it is ensured that magnetic suction disc fixation, the change in displacement of test other end encapsulation plug；
During the test, air bag generates volume change with the length variation and the variation of temperature of bellow mold, so as to make ripple
Air pressure inside pipe mold is consistently equal to ambient pressure；Test result show the Early self-shrinkage of concrete sample do not generate because
Test error caused by the variation of bellow mold internal pressure, bellow mold are lifted, also do not generate and test bracket
Frictional force realizes good test effect.
After test, plane opens the potted ends of bellow mold, the disc disk and ghost that encapsulate plug is backed out, embedded part is still
It is combined together with concrete sample, then new embedded part is taken to be screwed on embedded part slot, remained test next time and use.
Claims (7)
1. a kind of bellows encapsulates plug, it is characterised in that：Including disc disk (11), ghost (12), embedded part (13), connecting cylinder
(14), stock plug (16) or ventilation nozzle (17), rubber stopper (15), air bag (4) and plastic tube (41)；
The disc disk (11) is pied geometry, and disc disk (11) is equipped with venthole (112) and disk hole (111), venthole
(113) positioned at (11) 12 o-clock position of disc disk, disk hole (111) are positioned at (11) 6 o-clock position of disc disk；
The embedded part (13) includes embedded part disk (131) and screw rod (132)；
The ghost (12) is with 2~4 ° of cup body structure, including rim of a cup (123), wall of cup (121) and bottom of a cup (122)；It is described
Ghost (12) and disc disk (11) secure fit form hollow-core construction (18) in inside；Rim of a cup (123) diameter is more than bottom of a cup
(122) diameter, bottom of a cup (122) outside of the ghost (12) are equipped with embedded part slot (1221), the embedded part slot (1221) and embedded part
Disk (131) forms the thread fitting for being capable of disassembled and assembled freely；The wall of cup (121) of the ghost (12) is equipped with dise knife (1211), empty
The bottom of a cup (122) of shell (12) is equipped with ghost hole (1222), and the edge of a knife of dise knife (1211) is towards disc disk (11), ghost hole (1222)
Positioned at 12 o-clock position of cup body bottom surface；
Ghost hole (1222) diameter is compared with venthole (112) small 1~2mm, and ghost hole (1222) are with venthole (112) positioned at same
One axis and connected by connecting cylinder (14), the diameter of the connecting cylinder (14) with venthole (112) unanimously, venthole (112), even
Connect cylinder (14) is intercommunicating pore with the structure connected that ghost hole (1222) form；The intercommunicating pore and the hollow-core construction (18) are no
Connection, the disk hole (111) connect with the hollow-core construction (18), and rubber stopper (15) can pass through the bottom of a cup (122) of ghost
Ghost hole (1222) are blocked in outside, and stock plug (16) can be inserted into intercommunicating pore by venthole (112), by ghost hole (1222)
It blocks；
The ventilation nozzle (17) includes rubber mouth (171) and rubber tube (172), the rubber mouth (171) and the ghost hole
(1222) cooperation for being capable of disassembled and assembled freely is formed；
The air bag (4) is connect by plastic tube (41) with venthole (112), and the volume of air bag (4) in a free state is 50
~100cm3；
The stock plug (16) includes stock (161) and T-shaped rubber stopper (162), and T-shaped rubber stopper (162) front end can run through sky
Housing hole (1222) simultaneously forms tight fit with ghost hole (1222)；The T-shaped rubber stopper (162) includes barrel shape slot (1621) and plug
Head (1622), when stock plug (16) is from venthole (112) and connecting cylinder (14) across when ghost hole (1222) are blocked, chock plug
(1622) coordinate with ghost hole (1222), the length of chock plug (1622) is not less than the length of ghost hole (1222), barrel shape slot
(1621) intersection of ghost hole (1222) and connecting cylinder (14) is got lodged in.
A kind of 2. bellows encapsulation plug according to claim 1, which is characterized in that the venthole (112) a diameter of 5
~8mm, disk hole (111) a diameter of 1~2mm；The length of the rubber stopper (15) is 4~8mm.
3. a kind of concrete self-shrinkage test device of bellows encapsulation plug described in claim 2 is set, it is characterised in that：Institute
It states concrete self-shrinkage test device and further includes bellow mold (2)；The quantity of the bellows encapsulation plug (1) is two；
The bellow mold (2) is including potted ends (21), ripple (22) and ripple away from (23)；The potted ends (21) are positioned at bellows
The both ends of mold (2), are the parts that bellow mold (2) coordinates with encapsulation plug (1), and the internal diameter of potted ends (21) sets 2~4 °
Taper, the internal diameter in the outside of potted ends (21) is more than the internal diameter of inside, and ripple (22) the width b is 5~10mm, ripple away from
(23) it is coupling part between two ripples, width a of the ripple away from (23) is 1~2mm；
The bellow mold (2) stretch in a free state 3mm and compress 3mm used in power no more than 20mN；
When encapsulating plug (1) with bellow mold (2) cooperation, the edge of a knife of the dise knife (1211) is against the interior of potted ends (21)
Wall；The cooperation that the encapsulation plug (1) can install but can not dismantle with the potted ends (21) formation.
A kind of 4. concrete self-shrinkage test device according to claim 3, which is characterized in that the encapsulation plug (1)
For encapsulating the potted ends (21) at bellow mold (2) both ends, the encapsulation plug (1) of one end passes through magnetic suction disc (52) and disc
Disk (11) cooperation is fixed, the change in displacement of test other end encapsulation plug disc disk (11)；
The material of the encapsulation plug (1) is the metal material with magnetic property.
5. use a kind of method of concrete self-shrinkage test device described in claim 4, which is characterized in that the test dress
When putting the self-constriction for testing maturing, include the following steps：
(1) the ghost hole (1222) of an encapsulation plug (1) is blocked using rubber stopper (15), makes the encapsulation plug (1) and wave
Potted ends (21) cooperation of line pipe mold (2), and press close；
(2) openend of bellow mold (2) is erected vertically upward, the concrete sample newly mixed and stirred (3) is poured into bellows
In mold (2), when at potted ends (21) position of concreting to top, stop pouring, then take an encapsulation plug (1)
It is fitted close with the potted ends (21) of bellow mold (2), the gas in bellow mold is discharged by intercommunicating pore, then will be long
Bar plug (16) seals ghost hole (1222) across venthole (112) and connecting cylinder (14)；
(3) after the hardening of fresh concrete sample, concrete sample (3), bellow mold (2) and encapsulation plug (1) form a kind of
The hardening sample of self-constriction test is can be directly used for, the screw rod (132) of the embedded part (13) is embedded in concrete sample (3)
In, embedded part (13) and concrete sample (3) form securely non-removable cooperation, during test, by one end of the hardening sample
It is fixed, other end of change in displacement is tested, after test, plane opens the potted ends (21) of bellow mold (2), and encapsulation is stifled
The disc disk (11) and ghost (12) of head (1) are backed out, and embedded part (13) is still combined together with concrete sample, then takes new embedded part
(13) thread fitting is formed with the embedded part slot of the ghost (12) (1221), remains test next time and use.
6. use a kind of method of concrete self-shrinkage test device described in claim 4, which is characterized in that the test dress
When putting for testing self-constriction of the concrete sample by plasticity to hardening phase, include the following steps：
(1) an encapsulation plug (1) is taken, is blocked its ghost hole (1222) using rubber stopper (15), another is taken to encapsulate plug
(1), ventilation nozzle (17) is installed on its ghost hole (1222), air bag (4) is installed on its venthole (112)；Rubber stopper will be used
(15) one end fits of the encapsulation plug (1) blocked and bellow mold (2), and press close；
(2) openend of bellow mold (2) is erected vertically upward, the concrete sample newly mixed and stirred (3) is poured into bellows
In mold (2), when concrete sample (3) is poured to (21) 10~15mm of potted ends apart from top, it will be mounted with to ventilate
The potted ends (21) on the encapsulation plug (1) of mouth (17) and air bag (4) and bellow mold (2) top coordinate, and by ventilation nozzle
(17) rubber tube (172) is butted at the first segment nearest apart from top potted ends (21) or the second section ripple (22), will be encapsulated
Plug (1) pressing is close, then the bellow mold (2) for having contained concrete sample is gently laid flat, and ensure venthole (112)
At the position of 12 o'clock direction, gently vibrations make concrete sample levelling in bellow mold, while in bellow mold
Gas squeezed to bellow mold top, each ripple of bellow mold passes through the air communication on top, ripple pipe die
The ripple of tool is connected also through intercommunicating pore with air bag (4), encapsulation plug (1), bellow mold (2), air bag (4) and concrete examination
Sample (3) forms a kind of plasticity sample that can be directly used for the test of concrete Early self-shrinkage；
(3) in the Early self-shrinkage for testing concrete sample, the plasticity sample is lifted, and one end is fixed, and tests the other end
Change in displacement；During the test, air bag (4) generates body with the length variation and the variation of temperature of bellow mold (2)
Product variation, so as to which the air pressure inside bellow mold be made to be consistently equal to ambient pressure；
(4) after testing, plane opens the potted ends (21) of bellow mold (2), will encapsulate the disc disk (11) and sky of plug (1)
Shell (12) is backed out, and embedded part (13) is still combined together with concrete sample (3), then takes burying for new embedded part (13) and ghost (12)
Part slot (1221) forms thread fitting, remains test next time and uses.
A kind of 7. application method of concrete self-shrinkage test device according to claim 6, which is characterized in that step
(3) plasticity sample described in is sling by chain sling (51), and chain sling (51) is hung on test bracket (5), and the ripple is quilt away from (23)
The impetus sling.
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| CN201711361297.4A CN108254536B (en) | 2017-12-18 | 2017-12-18 | Corrugated pipe packaging plug, concrete self-shrinkage testing device using same and concrete self-shrinkage testing method |
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