CN109682748A - Test the device and method of intensity under expansive concrete lateral confinement - Google Patents
Test the device and method of intensity under expansive concrete lateral confinement Download PDFInfo
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- CN109682748A CN109682748A CN201910009392.0A CN201910009392A CN109682748A CN 109682748 A CN109682748 A CN 109682748A CN 201910009392 A CN201910009392 A CN 201910009392A CN 109682748 A CN109682748 A CN 109682748A
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- 238000012360 testing method Methods 0.000 title claims abstract description 105
- 238000000034 method Methods 0.000 title abstract description 20
- 230000006835 compression Effects 0.000 claims description 9
- 238000007906 compression Methods 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 6
- 230000005574 cross-species transmission Effects 0.000 claims description 4
- 238000011017 operating method Methods 0.000 claims description 4
- 230000005855 radiation Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 13
- 239000002002 slurry Substances 0.000 description 8
- 239000004568 cement Substances 0.000 description 7
- 241000656145 Thyrsites atun Species 0.000 description 5
- 230000003139 buffering effect Effects 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 230000001550 time effect Effects 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
- G01N19/00—Investigating materials by mechanical methods
Abstract
A kind of device and method for testing intensity under expansive concrete lateral confinement, it includes test box, constant-resistance mechanism and pressing mechanism, pass through each groove body end elastic movable supports constant-resistance mechanism in the test box for being mutually perpendicular to intersect connection, it is distributed in test box center and each groove body by pressing mechanism, passes through the pressing mechanism pressurization measurement expansive concrete lateral confinement intensity successively to each groove body and test box center.The present invention overcomes the problems that inaccuracy is individually tested in former expansion mixed mud lateral confinement measurement, have structure simple, disposably measure the lateral confinement intensity of multiple directions, measurement is accurate, this method feature simple to operate.
Description
Technical field
The invention belongs to experimental test technical field, it is related to the device of intensity and side under a kind of test expansive concrete lateral confinement
Method.
Background technique
The specification of existing test cement slurry property, test are substantially and do in the case where no lateral confinement, and used
Expansion cement slurry in swelling agent content it is extremely low.Under the conditions of routine is without lateral confinement, large dosage expansion cement slurry will will appear expansion
It destroys, densely covered crackle occurs in surface, there will be severe loose incrustate, expanding cement pulp material will lose completely at this time
Effect.And when there is lateral confinement condition, expansion cement slurry can obtain different compactness extents under itself dilatancy and lateral confinement double action
Slurry, while generating biggish expansive force.But since large dosage expanded agent cement paste can be biggish to anchor pole and hole wall generation
Whether radial pressure, country rock body can be destroyed since expansive force is excessive, be still unsolved engineering problem at this stage.It is existing
In test process, can only single analog side apparent expansion lateral confinement intensity, the test equipment of honeycombed cement anchor pole is not bound with, so that surveying
Examination inaccuracy, influences subsequent anchoring.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of device of intensity under test expansive concrete lateral confinement and sides
Method, structure is simple, using each groove body end elastic movable supports constant-resistance mechanism for the test box for being mutually perpendicular to intersect connection, pressurization
Distribution of Institutions successively expands the pressing mechanism pressurization measurement of each groove body and test box center in test box center and each groove body
Concrete lateral confinement intensity disposably measures the lateral confinement intensity of multiple directions, and precisely, this method is simple to operate for measurement.
In order to solve the above technical problems, the technical scheme adopted by the invention is that: under a kind of test expansive concrete lateral confinement
The device of intensity, it includes test box, constant-resistance mechanism and pressing mechanism；The test box is the hollow groove at both ends and upper side opening
Body is mutually perpendicular to intersect the cabinet of composition being mutually communicated, constant-resistance mechanism and each groove body elastic movable supports, pressing mechanism distribution
In in cabinet center and each groove body.
Setting otic placode is connect with constant-resistance mechanism on the upside of the end of the groove body.
The pull plate that can vertically extract out is set at the cross one another perforation of groove body.
The constant-resistance mechanism includes the rotation axis connecting with baffle, the fixed link above rotation axis, is located at rotation axis
Torsional spring of the both ends cooperation with fixed pike pole even.
The rotation axis and fixed link are connect with otic placode, and torsional spring and baffle contradict, and the end of baffle and groove body, which cooperates, to be sealed.
The pressing mechanism includes the pressure plare and thrust plate being slidably matched with two slide-bars, one end of slide-bar and groove body
Bottom is connected and fixed, and pressure plare is slidably matched with groove body.
The rubber column that the downside setting of the thrust plate is contradicted with pressure plare.
The operating method of the device of intensity under test expansive concrete lateral confinement as described above, characterized in that it includes such as
Lower step:
S1, before test, test box is in opening-wide state, and pull plate, constant-resistance mechanism, pressure plare and thrust plate are separated with test box；
Pull plate, is inserted into the end point of each groove body in test box by S2, and each groove body is mutually separated；
S3, filling, by institute expansive concrete to be tested be filled into each groove body of test box, not from the end of groove body spilling；
S4, closed end cooperate rotation axis and fixed link and otic placode, and torsional spring and fixed pike pole are even contradicted with baffle, baffle with
The notch of groove body seals；
Pressure plare is set on two slide-bars by S5, fully sheathed case mouth, and pressure plare gradually slides into groove body and connects with expansive concrete
Touching；
Thrust plate is set on two slide-bars by S6, installed thrust plate, and the rubber column and pressure plare of downside contradict；
S7, ionization meter under groove body lateral confinement press to thrust plate using pressurized equipment, and thrust plate stress pushes rubber column to pressure
Plate pressure, pressure plare press to expansive concrete, and after concrete compression, dam forces open, and concrete overflows from the downside of groove body
Stop pressurization when out, measure pressure value, after pressure revocation, baffle is resetted closing notch by the torsional forces of torsional spring；
S8, test box center pressurization, pull plate is pulled up but does not deviate from test box, makes the mutual connection of each groove body, using adding
Equipment is pressed to press the thrust plate at test box center, thrust plate stress pushes rubber column to press pressure plare, and pressure plare is to center
Expansive concrete pressurization, and around each groove body radiation, until baffle open but do not spill over concrete stop pressurization, measure
Pressure value.
A kind of device for testing intensity under expansive concrete lateral confinement, it includes test box, constant-resistance mechanism and pressing mechanism；It surveys
Examination case is mutually perpendicular to intersect the cabinet of composition being mutually communicated, constant-resistance mechanism and each slot for the hollow groove body at both ends and upper side opening
Body elasticity is flexibly connected, and pressing mechanism is distributed in cabinet center and each groove body.Structure is simple, by being mutually perpendicular to intersect company
Each groove body end elastic movable supports constant-resistance mechanism of logical test box, is distributed in test box center and each slot by pressing mechanism
In vivo, by the pressing mechanism pressurization measurement expansive concrete lateral confinement intensity successively to each groove body and test box center, disposably
The lateral confinement intensity of multiple directions is measured, precisely, this method is simple to operate for measurement.
In the preferred scheme, setting otic placode is connect with constant-resistance mechanism on the upside of the end of groove body.Structure is simple, in use,
The otic placode of prominent groove body is flexibly connected with constant-resistance mechanism, easy to disassemble, connector be respectively positioned on the outside of test box not with swelled mixture
Solidifying soil contact, avoids bite.
In the preferred scheme, the pull plate that can vertically extract out is set at the cross one another perforation of groove body.Structure is simple, makes
Test box is separated into five mutually independent test spaces by used time, pull plate, when test, can be carried out respectively to each test space
Independent or joint pressure test, the data measured are more acurrate.
In the preferred scheme, constant-resistance mechanism include the rotation axis being connect with baffle, the fixed link above rotation axis,
Cooperate the torsional spring with fixed pike pole even positioned at rotation axis both ends.Structure is simple, in use, constant-resistance mechanism is used to close the end of groove body
Head opens after the intracorporal expansive concrete of slot is pressurized, releases part concrete, after cancelling pressure, restore closed state automatically.
In the preferred scheme, rotation axis and fixed link are connect with otic placode, and torsional spring and baffle contradict, the end of baffle and groove body
Head cooperation sealing.Structure is simple, in use, torsional spring and rotation axis cooperate, one end and fixed pike pole connect, and the other end and baffle contradict
Apply one to the intracorporal pressure of slot, cooperates baffle and groove body and seal, thick expansive concrete slurries is avoided not have
It is just released before pressure.
In the preferred scheme, pressing mechanism includes the pressure plare and thrust plate being slidably matched with two slide-bars, slide-bar
One end and the bottom of groove body are connected and fixed, and pressure plare is slidably matched with groove body.Structure is simple, in use, using press device pair
Thrust plate pressure, thrust plate push pressure plare to slide extrusion expansion concrete along groove body, measure lateral confinement intensity.
In the preferred scheme, the rubber column that the downside setting of thrust plate is contradicted with pressure plare.Structure is simple, presses
Cheng Zhong is contacted using rubber column with pressure plare, has certain buffering effect in pressurized process, after avoiding pressure plare from being pressurized suddenly
Cause the excessive accuracy for influencing test of local compression.
In the preferred scheme, the operating method of the device of intensity under expansive concrete lateral confinement is as above tested, characterized in that
It includes the following steps:
S1, before test, test box is in opening-wide state, and pull plate, constant-resistance mechanism, pressure plare and thrust plate are separated with test box；
Pull plate, is inserted into the end point of each groove body in test box by S2, and each groove body is mutually separated；
S3, filling, by institute expansive concrete to be tested be filled into each groove body of test box, not from the end of groove body spilling；
S4, closed end cooperate rotation axis and fixed link and otic placode, and torsional spring and fixed pike pole are even contradicted with baffle, baffle with
The notch of groove body seals；
Pressure plare is set on two slide-bars by S5, fully sheathed case mouth, and pressure plare gradually slides into groove body and connects with expansive concrete
Touching；
Thrust plate is set on two slide-bars by S6, installed thrust plate, and the rubber column and pressure plare of downside contradict；
S7, ionization meter under groove body lateral confinement press to thrust plate using pressurized equipment, and thrust plate stress pushes rubber column to pressure
Plate pressure, pressure plare press to expansive concrete, and after concrete compression, dam forces open, and concrete overflows from the downside of groove body
Stop pressurization when out, measure pressure value, after pressure revocation, baffle is resetted closing notch by the torsional forces of torsional spring；
S8, test box center pressurization, pull plate is pulled up but does not deviate from test box, makes the mutual connection of each groove body, using adding
Equipment is pressed to press the thrust plate at test box center, thrust plate stress pushes rubber column to press pressure plare, and pressure plare is to center
Expansive concrete pressurization, and around each groove body radiation, until baffle open but do not spill over concrete stop pressurization, measure
Pressure value.This method is simple and convenient.
A kind of device and method for testing intensity under expansive concrete lateral confinement, it includes test box, constant-resistance mechanism and pressurization
Mechanism passes through pressurization by each groove body end elastic movable supports constant-resistance mechanism in the test box for being mutually perpendicular to intersect connection
Distribution of Institutions is pressurizeed by the pressing mechanism successively to each groove body and test box center and is measured in test box center and each groove body
Expansive concrete lateral confinement intensity.The present invention overcomes the problems of the single test inaccuracy of former expansion mixed mud lateral confinement measurement, have
Structure is simple, disposably measures the lateral confinement intensity of multiple directions, measurement is accurate, this method feature simple to operate.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples:
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is the schematic front view of Fig. 1.
Fig. 3 is enlarged diagram at the A of Fig. 1.
Fig. 4 is schematic cross-sectional view at the B-B of Fig. 2.
Fig. 5 is the working state figure of constant-resistance mechanism of the present invention.
In figure: test box 1, groove body 11, otic placode 12, pull plate 13, constant-resistance mechanism 2, baffle 21, rotation axis 22, fixed link
23, torsional spring 24, pressing mechanism 3, slide-bar 31, pressure plare 32, thrust plate 33, rubber column 34.
Specific embodiment
In Fig. 1 ~ 5, a kind of device for testing intensity under expansive concrete lateral confinement, it includes test box 1, constant-resistance mechanism 2
With pressing mechanism 3；The test box 1 is mutually perpendicular to intersect being mutually communicated for composition for the hollow groove body 11 at both ends and upper side opening
Cabinet, constant-resistance mechanism 2 and each 11 elastic movable supports of groove body, pressing mechanism 3 is distributed in cabinet center and each groove body 11.Knot
Structure is simple, by the 11 end elastic movable supports constant-resistance mechanism 2 of each groove body in the test box 1 for being mutually perpendicular to intersect connection, leads to
It is overpressurized mechanism 3 to be distributed in 1 center of test box and each groove body 11, by successively adding each groove body 11 and 1 center of test box
The pressurization measurement expansive concrete lateral confinement intensity of press mechanism 3, disposably measures the lateral confinement intensity of multiple directions, measurement is accurate, the party
Method is simple to operate.
In preferred scheme, setting otic placode 12 is connect with constant-resistance mechanism 2 on the upside of the end of the groove body 11.Structure is simple,
In use, the otic placode 12 of prominent groove body 11 is flexibly connected with constant-resistance mechanism 2, easy to disassemble, connector is respectively positioned on the outer of test box 1
Portion is not contacted with expansive concrete, avoids bite.
In preferred scheme, the pull plate 13 that can vertically extract out is set at the cross one another perforation of the groove body 11.Structure
It simply,, can be respectively to each survey when test in use, test box 1 is separated into five mutually independent test spaces by pull plate 13
It tries space to carry out independent or combine pressure test, the data measured are more acurrate.
In preferred scheme, the constant-resistance mechanism 2 includes the rotation axis 22 connecting with baffle 21, is located at 22 top of rotation axis
Fixed link 23, positioned at 22 both ends of rotation axis cooperation with 23 hook of fixed link even torsional spring 24.Structure is simple, in use, constant-resistance machine
Structure 2 is used to close the end of groove body 11, opens after the expansive concrete in groove body 11 is pressurized, releases part concrete, cancels
After pressure, restore closed state automatically.
In preferred scheme, the rotation axis 22 and fixed link 23 are connect with otic placode 12, and torsional spring 24 and baffle 21 contradict, gear
The end of plate 21 and groove body 11, which cooperates, to be sealed.Structure is simple, in use, torsional spring 24 and rotation axis 22 cooperate, one end and fixed link
23 hooks connect, and the other end and baffle 21 contradict and apply the pressure into groove body 11, cooperate baffle 21 and groove body 11 and seal, keep away
Exempt from thick expansive concrete slurries just to release before no pressure.
In preferred scheme, the pressing mechanism 3 includes the pressure plare 32 and thrust plate being slidably matched with two slide-bars 31
33, one end of slide-bar 31 and the bottom of groove body 11 are connected and fixed, and pressure plare 32 is slidably matched with groove body 11.Structure is simple, uses
When, it being pressed using press device to thrust plate 33, thrust plate 33 pushes pressure plare 32 to slide extrusion expansion concrete along groove body 11,
Measure lateral confinement intensity.
In preferred scheme, the rubber column 34 of the downside setting and the conflict of pressure plare 32 of the thrust plate 33.Structure letter
It is single, it in course of exerting pressure, is contacted using rubber column 34 with pressure plare 32, there is certain buffering effect in pressurized process, avoid pressing
Power plate 32 causes the excessive accuracy for influencing test of local compression after being pressurized suddenly.
In preferred scheme, the operating method as described above for testing the device of intensity under expansive concrete lateral confinement is special
Sign is that it includes the following steps:
S1, before test, test box 1 is in opening-wide state, pull plate 13, constant-resistance mechanism 2, pressure plare 32 and thrust plate 33 and test
Case 1 separates；
Pull plate 13, is inserted into the end point of each groove body 11 in test box 1 by S2, and each groove body 11 is mutually separated；
S3, filling, by expansive concrete to be tested be filled into each groove body 11 of test box 1, not from the end of groove body 11
It overflows；
S4, closed end cooperate rotation axis 22 and fixed link 23 with otic placode 12, and torsional spring 24 and 23 hook of fixed link connect and baffle 21
It contradicts, the notch of baffle 21 and groove body 11 seals；
Pressure plare 32 is set on two slide-bars 31 by S5, fully sheathed case mouth, and pressure plare 32 gradually slides into groove body 11 and swelled mixture
Solidifying soil contact；
Thrust plate 33 is set on two slide-bars 31 by S6, installed thrust plate, and rubber column 34 and the pressure plare 32 of downside support
Touching；
S7, ionization meter under groove body lateral confinement press to thrust plate 33 using pressurized equipment, and 33 stress of thrust plate pushes rubber column 34
Press to pressure plare 32, pressure plare 32 presses to expansive concrete, and after concrete compression, 21 stress of baffle is opened, concrete from
Stop pressurization when the downside of groove body 11 is overflowed, measure pressure value, after pressure revocation, baffle 21 is resetted by the torsional forces of torsional spring 24
Close notch；
Pull plate 13, is pulled up but is not deviate from test box 1, make the mutual connection of each groove body 11, adopt by S8, test box center pressurization
It being pressed with thrust plate 33 of the pressurized equipment to 1 center of test box, 33 stress of thrust plate pushes rubber column 34 to press pressure plare 32,
Pressure plare 32 pressurizes to the expansive concrete at center, and each groove body 11 around radiates, until baffle 21 opens but does not spill over
Concrete stops pressurization, measures pressure value.This method is simple and convenient.
The device and method of intensity, when installing and using, is being mutually perpendicular under test expansive concrete lateral confinement as described above
Intersect the 11 end elastic movable supports constant-resistance mechanism 2 of each groove body of the test box 1 of connection, pressing mechanism 3 is distributed in test box 1
It is successively strong to the pressurization measurement expansive concrete lateral confinement of pressing mechanism 3 at 1 center of each groove body 11 and test box in the heart and each groove body 11
Degree disposably measures the lateral confinement intensity of multiple directions, and precisely, this method is simple to operate for measurement.
In use, the otic placode 12 of prominent groove body 11 is flexibly connected with constant-resistance mechanism 2, easy to disassemble, connector is respectively positioned on survey
The outside of examination case 1 is not contacted with expansive concrete, avoids bite.
It, can be right respectively when test in use, test box 1 is separated into five mutually independent test spaces by pull plate 13
It is more acurrate that each test space carries out independent or joint pressure test, the data measured.
In use, constant-resistance mechanism 2 is used to close the end of groove body 11, the expansive concrete compression post-tensioning in groove body 11
It opens, releases part concrete, after cancelling pressure, restore closed state automatically.
In use, torsional spring 24 and rotation axis 22 cooperate, one end and 23 hook of fixed link connect, and the other end and baffle 21 contradict and apply
One pressure into groove body 11 cooperates baffle 21 and groove body 11 and seals, thick expansive concrete slurries is avoided not have
It is just released before having pressure.
In use, being pressed using press device to thrust plate 33, thrust plate 33 pushes pressure plare 32 to squeeze along the sliding of groove body 11
Compression swelling concrete measures lateral confinement intensity.
It in course of exerting pressure, is contacted using rubber column 34 with pressure plare 32, there is certain buffering effect in pressurized process, keep away
Exempt to cause the excessive accuracy for influencing test of local compression after pressure plare 32 is pressurized suddenly.
The above embodiments are only the preferred technical solution of the present invention, and are not construed as limitation of the invention, this Shen
Please in embodiment and embodiment in feature in the absence of conflict, can mutual any combination.Protection model of the invention
The technical solution that should be recorded with claim is enclosed, the equivalent replacement side of technical characteristic in the technical solution recorded including claim
Case is protection scope.Equivalent replacement i.e. within this range is improved, also within protection scope of the present invention.
Claims (8)
1. the device of intensity under a kind of test expansive concrete lateral confinement, it is characterized in that: it includes test box (1), constant-resistance mechanism (2)
With pressing mechanism (3)；The test box (1) is mutually perpendicular to intersect the phase of composition for the hollow groove body (11) at both ends and upper side opening
The cabinet mutually penetrated through, constant-resistance mechanism (2) and each groove body (11) elastic movable supports, pressing mechanism (3) be distributed in cabinet center and
In each groove body (11).
2. the device of intensity under test expansive concrete lateral confinement according to claim 1, it is characterized in that: the groove body (11)
End on the upside of setting otic placode (12) connect with constant-resistance mechanism (2).
3. the device of intensity under test expansive concrete lateral confinement according to claim 1, it is characterized in that: the groove body (11)
The pull plate (13) that can vertically extract out is set at cross one another perforation.
4. the device of intensity under test expansive concrete lateral confinement according to claim 2, it is characterized in that: the constant-resistance mechanism
(2) include the rotation axis (22) being connect with baffle (21), the fixed link (23) being located above rotation axis (22), be located at rotation axis
(22) torsional spring (24) of the both ends cooperation with fixed link (23) hook even.
5. the device of intensity under test expansive concrete lateral confinement according to claim 4, it is characterized in that: the rotation axis
(22) it is connect with fixed link (23) with otic placode (12), torsional spring (24) and baffle (21) contradict, the end of baffle (21) and groove body (11)
Head cooperation sealing.
6. the device of intensity under test expansive concrete lateral confinement according to claim 1, it is characterized in that: the pressing mechanism
It (3) include the pressure plare (32) and thrust plate (33) being slidably matched with two slide-bars (31), one end of slide-bar (31) and groove body
(11) bottom is connected and fixed, and pressure plare (32) is slidably matched with groove body (11).
7. the device of intensity under test expansive concrete lateral confinement according to claim 6, it is characterized in that: the thrust plate
(33) rubber column (34) that downside setting is contradicted with pressure plare (32).
8. described in any item operating methods for testing the device of intensity under expansive concrete lateral confinements according to claim 1 ~ 7,
It is characterized in, it includes the following steps:
S1, before test, test box (1) is in opening-wide state, pull plate (13), constant-resistance mechanism (2), pressure plare (32) and thrust plate
(33) it is separated with test box (1)；
Pull plate (13), are inserted into the end point of each groove body (11) in test box (1) by S2, and each groove body (11) is mutually separated；
S3, filling, each groove body (11) that institute's expansive concrete to be tested is filled into test box (1) is interior, not from groove body (11)
End overflow；
S4, closed end cooperate rotation axis (22) and fixed link (23) and otic placode (12), torsional spring (24) and fixed link (23) hook
It is even contradicted with baffle (21), the notch of baffle (21) and groove body (11) seals；
Pressure plare (32) is set on two slide-bars (31) by S5, fully sheathed case mouth, and pressure plare (32) gradually slides into groove body (11)
It is contacted with expansive concrete；
Thrust plate (33) is set on two slide-bars (31) by S6, installed thrust plate, the rubber column (34) and pressure plare of downside
(32) it contradicts；
S7, ionization meter under groove body lateral confinement press to thrust plate (33) using pressurized equipment, and thrust plate (33) stress pushes rubber
Column (34) presses to pressure plare (32), and pressure plare (32) presses to expansive concrete, after concrete compression, baffle (21) stress
It opens, concrete stops pressurization when overflowing from the downside of groove body (11), measures pressure value, after pressure revocation, baffle (21) is turned round
The torsional forces of spring (24) resets closing notch；
S8, test box center pressurization, pull plate (13) is pulled up but is not deviate from test box (1), keeps each groove body (11) mutual
Connection is pressed using thrust plate (33) of the pressurized equipment to test box (1) center, and thrust plate (33) stress pushes rubber column (34)
It presses to pressure plare (32), pressure plare (32) pressurizes to the expansive concrete at center, and each groove body (11) radiation around, directly
It is opened to baffle (21) but does not spill over concrete and stop pressurization, measure pressure value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910009392.0A CN109682748B (en) | 2019-01-04 | 2019-01-04 | Device for testing strength of expansive concrete under lateral confinement |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910009392.0A CN109682748B (en) | 2019-01-04 | 2019-01-04 | Device for testing strength of expansive concrete under lateral confinement |
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| CN109682748A true CN109682748A (en) | 2019-04-26 |
| CN109682748B CN109682748B (en) | 2021-06-29 |
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