CN104931313B - Manufacturing method of ring test mold for testing shrinkage and cracking of mortar and concrete - Google Patents
Manufacturing method of ring test mold for testing shrinkage and cracking of mortar and concrete Download PDFInfo
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- CN104931313B CN104931313B CN201510287892.2A CN201510287892A CN104931313B CN 104931313 B CN104931313 B CN 104931313B CN 201510287892 A CN201510287892 A CN 201510287892A CN 104931313 B CN104931313 B CN 104931313B
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Abstract
The invention discloses a manufacturing method of a ring test mold for testing the shrinkage and cracking of mortar and concrete. The method comprises the following steps: (1) producing a hollow annular base, wherein the hollow annular base consists of five parts, i.e., a square hollow soleplate, an inner ring, a soleplate fixing column, a soleplate fixing groove and a base lifting hand; (2) producing a paired lifting lug outer ring, wherein the outer ring is formed by two movable half rings identical in size in a pairing manner, and a pair of lifting lugs is respectively welded on one side of an axial edge of the half ring; (3) producing a movable cylindrical bolt; (4) installing the two paired lifting lug outer rings into the hollow base, fixing one end of the outer ring by virtue of the fixing column, and fixing the other end of the outer ring by penetrating the movable cylindrical bolt obtained in the step (3) into the two lifting lugs to enter the fixing groove. The inner ring and the outer ring are paired to form an annular space which is filled with pouring mortar or concrete. The device is matched with a strain recorder, so that the strain caused by the shrinkage of a mortar and concrete sample can be automatically recorded and monitored for a long time, the cracking time can be accurately determined, and the volume deformation of cement concrete material at each period can be qualitatively and quantitatively researched.
Description
Technical field
The invention belongs to building material engineering technical field, more particularly to a kind of test mortar and Shrinkage Cracking of Concrete
The manufacture method of annulus die trial.
Background technology
Construction material（Such as mortar and concrete）Cracking is the emphasis and difficult point of building engineering structure safety control, always
By the extensive concern with each link of building trade such as structure design, construction, material etc..From in terms of structural point, early stage（7d with
Before）Cracking is that early-age shrinkage develops bound result；From in terms of material degree, using ultra-fine glue material and low water binder ratio is adopted in a large number
The self-desiccation effect of the rear generations such as design, also easily causes self-constriction to be ftractureed；From construction angle in terms of, maintenance not in time, maintenance when
Between not enough, conserve it is lack of standardization etc. cause concrete to be exposed to too early under dry environment, internal moisture is excessively scattered and disappeared too early makes capillary
Pore footpath reduces, and causes season cracking.The harm of early-age crack and it is disadvantageous in that：One is that rift defect allows from aesthstic angle
People cannot receive, because the integrity and flatness of cracking destruction surface of concrete buildings, have impact on visual effect；Two are
It is inevitable during cracking to produce a large amount of microcracks in inside concrete, Korrosionsmedium transmission channel is formed, this is structure durability mistake
Effect creates condition；Three is that the penetrability cracking of constrained concrete necessarily causes xoncrete structure integrally to destroy, and causes structure
Basic function is lost；Four is xoncrete structure premature failure in the validity period far below projected life, not only consumes a huge sum of money
Maintenance and reconstruction, cause huge economic losses, the personal safety of the serious threat people.
From works safety and durability angle, assess and detect mortar, early cracks of concrete development it is non-
It is often important.And be correctly detected and the contraction and cracking trend for evaluating concrete, it is to take measures to efficiently reduce or avoid out
The premise split.
At present both at home and abroad the more ripe method of detection Shrinkage Cracking of Concrete has：Flat band method, ring method and single shaft method.Its
Middle ring method can evaluate and test many factors impact, and device is simple, thus have developed rapidly.Ring method is earliest by the Massachusetts Institute of Technology
Carlson is proposed in nineteen forty-two；Nineteen ninety, the Shah of Northwestern Univ USA have modified the size of test sample, it is proposed that ACBM side
Method；Rogalla in 1996 etc. is modified to the annulus instrument specification of Shah, it is proposed that AASHTO methods；Later, Mace spy built
The See of material company is on the basis of comprehensive ACBM methods and AASHTO methods, it is proposed that the annulus specification of oneself, and defines mortar
Or concrete constrained crack-ing standard test method（ASTM C1581-04）.Additionally, ring method also have Wittmann methods and
Swamy methods etc..
Ring method simple structure, steel loop can be provided for test specimen narrowing of the ring and completely constrained enough, with answering on Radius
Power size is relatively uniform, and can be by measuring the strain on steel loop inwall come the tension in calculation testing piece；Certain
In the range of, sample dimensions, border condition etc. affect little to result of the test, it is easy to promote and standardization.But annulus die trial sets
Meter is unreasonable, excessively heavy, inconvenience is guided and supported, in the urgent need to a kind of annulus testing mould reasonable in design.Additionally, ring method is surveyed
The examination time is long, and sensitivity is poor, and test specimen is typically passed through the long period and incipient crack just occurs, sometimes even because of sensitivity difference
Be not in.And ring method is relatively used for qualitative investigation as a kind of passive bound, these all limit the suitable of ring method
With.
The present invention is after several annulus testing moulds conventional in the world are compared, it is proposed that a kind of new annulus die trial is excellent
Change mentality of designing, improve the manufacture method of annulus die trial.New annulus die trial will not change raw steel Zernike annular polynomial distribution situation, but matter
Amount is lighter, dismounting is more convenient, is easy to carry, and practicality is higher, preferably embodies the design concept that people-oriented.
The content of the invention
It is an object of the invention to provide a kind of test mortar of optimized design and the annulus die trial of Shrinkage Cracking of Concrete
Manufacture method.Concretely comprise the following steps：
（One）Make hollow ring base:Hollow ring base is by hollow base plate, interior annular, fixed column, fixing groove and carries
The part of handss five is constituted, and material is Q235 steel.Wherein, hollow base plate is square, and thickness 6-8mm, length 430-432mm are
Mitigate annulus die trial deadweight, cut away diameter 290-292mm circles at empty annular base geometric center in the square, will after cutting
Deburring, chamfering；Interior annular internal diameter 302-306mm, thickness 8-12mm, height 150-166mm, interior annular and base plate geometric center
Overlap, and by being fixedly welded on Hollow floor, it is rough scarce that the interior outside of interior annular is not allow for oxide layer, rust
Fall into；Fixed column diameter 18-20mm, height 165-167mm, fixed column is located at square hollow ring base diagonal Shang Ju centers
At 223-225mm, by being fixedly welded on hollow base plate, warpage, deformation, crackle are not allow for；Fixing groove notch diameter
19-21mm, depth 4-6mm, it is symmetrical with fixed column, it is connected with fixed column positioned at square hollow ring base geometric center
At opposite direction 223-225mm of line, by being fixedly welded on hollow base plate；Handle, a pair of quantity is two length 100-
120mm, diameter 8mm cylinder steel bars, with hollow ring base geometric center, fixing groove, fixed column on the same line, and symmetrically
Distribution, by steel bar, vertical welding is fixed on hollow base plate Jing after 2 bendings；Above-mentioned part is related to two sides plus man-hour, fillet
Radius is no more than 2mm.
（Two）Make to formula hangers outer toroid:The outer toroid is made up of the semicircular ring of two pieces of activities, same size, semicircular ring
Diameter 406-410mm, height 150-152mm, thickness 8-10mm, the semicircular ring is cut and obtains or formed by sheet fabrication；Processing
When section corner angle answer rounding, chamfering radius to be less than 1mm, horizontal blank, indentation are not allow for after rounding；Semicircular ring axial direction edge
Side is respectively welded and is fixed with two hangers, hanger internal diameter 18-20mm, external diameter 20-22mm, height 15mm, welds the first semicircle
Want staggered positions during the hanger of ring and the second semicircular ring, i.e. away from lower end 32-36mm, the other end hangs one hanger of the first semicircular ring
Ear is away from upper end 32-36mm, and two hanger positions of the second semicircular ring are staggered with the first semicircular ring hanger positional symmetry；It is related to two to add
During work face, its root its radius of corner is no more than 2mm.
（Three）Creative activity latch:Movable latch is made up of cylinder and small circle ring；Body diameter 18-20mm, height 170-
172mm；Roundlet ring thickness 2-4mm, internal diameter 16-18mm, external diameter 19-21mm；Small circle ring is by being fixedly welded on cylindrical tip；Relate to
And during two machined surfaces, its root fillet radius is no more than 2mm.
（Four）Assembling:By step（One）Fixed column penetrates step（Two）In two hangers of two semicircular ring sides of gained,
By step（Three）Gained movable latch passes through step（Two）Two hangers insertion hollow ring of two semicircular ring opposite sides of gained
The fixing groove of base, by two semi-circular shape into formula hangers outer toroid is fixed；Now, interior annular, to formula hangers outer toroid
A torus space is formed with base plate, space supplies casting concrete.
Device and strain-recording instrument of the present invention etc. are used cooperatively, and can for a long time, automatically be recorded, be monitored mortar and concrete
Test specimen shrinks the strain size for producing, and can carry out Accurate Determining to cracking time, can also be to cement concrete material each age
Cubic deformation carries out qualitative and quantitative study.
The invention has benefit that, by arranging base handle, can easily guide and support whole device；Excision base center
After unnecessary steel, the tradition die trial of hollow circular ring mass ratio reduces 15%-20%；Combination type outer toroid causes to pour and test specimen dismounting
More convenient, the dismounting test specimen test specimen time is shorter.The circle ring device flexible adjustment, be capable of achieving to be conveniently detached, convenient operation, not only have
There is wittrgreat utility, while also preferably embodying the design concept of hommization.
Description of the drawings
Fig. 1 is the front view of the annulus die trial that the embodiment of the present invention 1 tests mortar and Shrinkage Cracking of Concrete.
Fig. 2 is the top view of the annulus die trial that the embodiment of the present invention 1 tests mortar and Shrinkage Cracking of Concrete.
Fig. 3 is the main view of the first semicircular ring of annulus die trial 2 that the embodiment of the present invention 1 tests mortar and Shrinkage Cracking of Concrete
Figure.
Fig. 4 is the vertical view of the first semicircular ring of annulus die trial 2 that the embodiment of the present invention 1 tests mortar and Shrinkage Cracking of Concrete
Figure.
Fig. 5 is the master of the annulus die trial hollow ring base 1 that the embodiment of the present invention 1 tests mortar and Shrinkage Cracking of Concrete
View.
Fig. 6 is bowing for the annulus die trial hollow ring base 1 that the embodiment of the present invention 1 tests mortar and Shrinkage Cracking of Concrete
View.
Fig. 7 is the main view of the annulus die trial movable latch 4 that the embodiment of the present invention 1 tests mortar and Shrinkage Cracking of Concrete
Figure.
Fig. 8 is the vertical view of the annulus die trial movable latch 4 that the embodiment of the present invention 1 tests mortar and Shrinkage Cracking of Concrete
Figure.
Labelling in figure：1- hollow ring bases；The semicircular ring of 2- first, the semicircular ring of 3- second；4- movable latch；5- is fixed
Post；6- fixing grooves；7- handles；8- interior annulars；9- hangers.
Specific embodiment：
Embodiment 1：
As shown in figures 1-8.
（One）Make hollow ring base 1:Hollow ring base 1 is by hollow base plate, interior annular 8, fixed column 5, fixing groove 6
Constitute with the part of handle 7 five, material is Q235 steel；Wherein, hollow base plate is square, thickness 6mm, length 430mm, just
Diameter 290mm circles, deburring, chamfering after cutting are cut away at the geometric center of square hollow annular base 1；The internal diameter of interior annular 8
302mm, thickness 8mm, height 155mm, interior annular 8 overlaps with the geometric center of hollow ring base 1, and by being fixedly welded in
On the plate of vacant lot；The diameter 18mm of fixed column 5, height 165mm, fixed column 5 is located at square floor diagonal Shang Ju center 224mm
Place, by being fixedly welded on hollow base plate；The notch diameter 20mm of fixing groove 6, depth 4mm, it is symmetrical with fixed column 5,
At opposite direction 224mm of the square geometric center of hollow ring base 1 and the connecting line of fixed column 5, by being fixedly welded on
On hollow base plate；Two handles 7 are length 100mm, diameter 8mm cylinder steel bars, with the geometric center of hollow ring base 1, solid
Determine groove 6, fixed column 5 on the same line, and it is symmetrical, by steel bar, vertical welding is fixed on hollow base plate Jing after 2 bendings
On；Above-mentioned part is related to two sides plus man-hour, and radius of corner is 1.8mm.
（Two）Make to formula hangers outer toroid:To formula hangers outer toroid by two pieces of activities, the first equivalently-sized semicircular ring
2 and second semicircular ring 3 constitute, size is diameter 406mm, height 150mm, thickness 8mm, two semicircular ring cuttings and obtain；Plus
Man-hour section corner angle be rounding, chamfering radius 0.8mm；Two semicircular ring axial directions edge side is respectively welded and is fixed with two hangers
9, the internal diameter 18mm of hanger 9, external diameter 20mm, height 15mm, position of staggering during the hanger 9 for welding the first semicircular ring 2 and the second semicircular ring 3
Put, i.e. away from lower end 32mm, the hanger 9 of the other end is away from upper end 32mm for 2 one hangers 9 of the first semicircular ring, and the second semicircular ring 3 two
Stagger with the positional symmetry of 2 hanger of the first semicircular ring 9 position of hanger 9；When being related to two machined surfaces, its root its radius of corner is
1.8mm。
（Three）Creative activity latch 4:Movable latch 4 is made up of cylinder and small circle ring；Body diameter 18mm, height 170mm；
Roundlet ring thickness 2mm, internal diameter 16mm, external diameter 20mm；Small circle ring is by being fixedly welded on cylindrical tip；Two machined surface root fillets
Radius is 1.8mm.
（Four）Assembling:By step（One）Fixed column 5 penetrates step（Two）The first semicircular ring 2 of gained and the second semicircular ring 3 one
In two hangers 9 of side, by step（Three）Gained movable latch 4 passes through step（Two）The first semicircular ring 2 of gained and the second semicircle
In the fixing groove 6 of two hangers 9 insertion hollow ring base 1 of the opposite side of ring 3, by the first semicircular ring 2 and the shape of the second semicircular ring 3
Into formula hangers outer toroid is fixed；Now, interior annular 8, an annulus sky is formed to formula hangers outer toroid and hollow base plate
Between, space supplies casting concrete.
Embodiment 2：
（One）Make hollow ring base 1:Hollow ring base 1 is by hollow base plate, interior annular 8, fixed column 5, fixing groove 6
Constitute with the part of handle 7 five, material is Q235 steel；Wherein, hollow base plate is square, thickness 6mm, length 432mm, just
Diameter 292mm circles, deburring, chamfering after cutting are cut away at the geometric center of square hollow annular base 1；The internal diameter of interior annular 8
302mm, thickness 10mm, height 165mm, interior annular 8 overlaps with the geometric center of hollow ring base 1, and by being fixedly welded on
On Hollow floor；The diameter 18mm of fixed column 5, height 167mm, fixed column 5 is located at square floor diagonal Shang Ju centers
At 224mm, by being fixedly welded on hollow base plate；The notch diameter 20mm of fixing groove 6, depth 5mm, it is symmetrical with fixed column 5
Distribution, it is solid by welding at opposite direction 224mm of the square geometric center of hollow ring base 1 and the connecting line of fixed column 5
On hollow base plate；Two handles 7 are length 120mm, diameter 8mm cylinder steel bars, in the geometry of hollow ring base 1
The heart, fixing groove 6, fixed column 5 are on the same line, and symmetrical, by steel bar during vertical welding is fixed on Jing after 2 bendings
On empty base plate；Above-mentioned part is related to two sides plus man-hour, and radius of corner is 1.8mm.
（Two）Make to formula hangers outer toroid:To formula hangers outer toroid by two pieces of activities, the first equivalently-sized semicircular ring
2 and second semicircular ring 3 constitute, size is diameter 410mm, height 152mm, thickness 10mm, two semicircular ring cuttings and obtain；Plus
Man-hour section corner angle be rounding, chamfering radius 0.8mm；Two semicircular ring axial directions edge side is respectively welded and is fixed with two hangers
9, the internal diameter 18mm of hanger 9, external diameter 20mm, height 15mm, position of staggering during the hanger 9 for welding the first semicircular ring 2 and the second semicircular ring 3
Put, i.e. away from lower end 36mm, the hanger 9 of the other end is away from upper end 36mm for 2 one hangers 9 of the first semicircular ring, and the second semicircular ring 3 two
Stagger with the positional symmetry of 2 hanger of the first semicircular ring 9 position of hanger 9；When being related to two machined surfaces, its root its radius of corner is
1.8mm。
（Three）Creative activity latch 4:Movable latch 4 is made up of cylinder and small circle ring；Body diameter 18mm, height 170mm；
Roundlet ring thickness 2mm, internal diameter 16mm, external diameter 20mm；Small circle ring is by being fixedly welded on cylindrical tip；Two machined surface root fillets
Radius is 1.8mm.
（Four）Assembling:By step（One）Fixed column 5 penetrates step（Two）The first semicircular ring 2 of gained and the second semicircular ring 3 one
In two hangers 9 of side, by step（Three）Gained movable latch 4 passes through step（Two）The first semicircular ring 2 of gained and the second semicircle
In the fixing groove 6 of two hangers 9 insertion hollow ring base 1 of the opposite side of ring 3, by the first semicircular ring 2 and the shape of the second semicircular ring 3
Into formula hangers outer toroid is fixed；Now, interior annular 8, an annulus sky is formed to formula hangers outer toroid and hollow base plate
Between, space supplies casting concrete.
Claims (1)
1. it is a kind of test mortar and Shrinkage Cracking of Concrete annulus die trial manufacture method, it is characterised in that concretely comprise the following steps：
（One）Make hollow ring base（1）:Hollow ring base（1）By hollow base plate, interior annular（8）, fixed column（5）, it is solid
Determine groove（6）And handle（7）Five parts are constituted, and material is Q235 steel；Wherein, hollow base plate is square, thickness 6-8mm, length
Degree 430-432mm；Empty annular base in the square（1）Diameter 290-292mm circles are cut away at geometric center, to be gone after cutting
Burr, chamfering；Interior annular（8）Internal diameter 302-306mm, thickness 8-12mm, height 150-166mm, interior annular（8）With base plate geometry
Center superposition, and by being fixedly welded on hollow base plate, interior annular（8）It is concavo-convex that interior outside is not allow for oxide layer, rust
Uneven defect；Fixed column（5）Diameter 18-20mm, height 165-167mm, fixed column（5）On square floor diagonal
At the 223-225mm of center, by being fixedly welded on hollow base plate, warpage, deformation, crackle are not allow for；Fixing groove（6）
Notch diameter 19-21mm, depth 4-6mm, with fixed column（5）It is symmetrical, positioned at square hollow ring base（1）In geometry
The heart and fixed column（5）At opposite direction 223-225mm of connecting line, by being fixedly welded on hollow base plate；Handle（7）, number
A pair of amount, two length 100-120mm, diameter 8mm cylinder steel bars, with hollow ring base（1）Geometric center, fixing groove（6）、
Fixed column（5）On the same line, it is and symmetrical, by steel bar Jing after 2 bendings vertical welding be fixed on hollow base plate it
On；Above-mentioned part is related to two sides plus man-hour, and radius of corner is no more than 2mm；
（Two）Make to formula hangers outer toroid:The outer toroid is by two pieces of activities, the first semicircular ring of same size（2）With the second half
Annulus（3）Constitute, diameter 406-410mm, height 150-152mm, thickness 8-10mm, cut and obtain or formed by sheet fabrication；
Plus man-hour section corner angle answer rounding, chamfering radius to be less than 1mm, horizontal blank, indentation are not allow for after rounding；First semicircular ring
（2）With the second semicircular ring（3）Axial edge side is respectively welded and is fixed with two hangers（9）, hanger（9）It is internal diameter 18-20mm, outer
Footpath 20-22mm, height 15mm, weld the first semicircular ring（2）With the second semicircular ring（3）Hanger（9）When want staggered positions, i.e.,
One semicircular ring（2）One hanger（9）Away from lower end 32-36mm, the hanger of the other end（9）Away from upper end 32-36mm, and the second semicircular ring
（3）Two hangers（9）Position and the first semicircular ring（2）Hanger（9）Positional symmetry staggers；When being related to two machined surfaces, its root its
Radius of corner is no more than 2mm；
（Three）Creative activity latch（4）：Movable latch（4）It is made up of cylinder and small circle ring；Body diameter 18-20mm, height
170-172mm；Roundlet ring thickness 2-4mm, internal diameter 16-18mm, external diameter 19-21mm；Small circle ring is by being fixedly welded on cylinder top
End；When being related to two machined surfaces, its root fillet radius is no more than 2mm；
（Four）Assembling:By step（One）Fixed column（5）Penetrate step（Two）The first semicircular ring of gained（2）With the second semicircular ring（3）
Two hangers of side（9）In, by step（Three）Gained movable latch（4）Through step（Two）The first semicircular ring of gained（2）With
Second semicircular ring（3）Two hangers of opposite side（9）Insertion hollow ring base（1）Fixing groove（6）In, by the first semicircular ring
（2）With the second semicircular ring（3）What is formed fixes to formula hangers outer toroid；Now, interior annular（8）, to formula hangers outer toroid and in
Empty base plate forms a torus space, and space supplies casting concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510287892.2A CN104931313B (en) | 2015-05-30 | 2015-05-30 | Manufacturing method of ring test mold for testing shrinkage and cracking of mortar and concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510287892.2A CN104931313B (en) | 2015-05-30 | 2015-05-30 | Manufacturing method of ring test mold for testing shrinkage and cracking of mortar and concrete |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104931313A CN104931313A (en) | 2015-09-23 |
| CN104931313B true CN104931313B (en) | 2017-05-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201510287892.2A Active CN104931313B (en) | 2015-05-30 | 2015-05-30 | Manufacturing method of ring test mold for testing shrinkage and cracking of mortar and concrete |
Country Status (1)
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009288132A (en) * | 2008-05-30 | 2009-12-10 | Miyama Ind Corp | Concrete strength test piece formwork |
| KR101291504B1 (en) * | 2011-05-24 | 2013-08-01 | 고려대학교 산학협력단 | Experimental Device and Method of restrained shrinkage of Concrete |
| CN202362296U (en) * | 2011-11-10 | 2012-08-01 | 中国建筑科学研究院 | Circular ring verifying device for crack resistance of plastering mortar |
| CN102520143A (en) * | 2011-12-14 | 2012-06-27 | 天津大学 | Method for testing shrinkage cracking performance of cement paste or mortar |
| CN203053970U (en) * | 2013-01-29 | 2013-07-10 | 长安大学 | Circular test device for inducing and accelerating cracking of concrete |
| CN103612323B (en) * | 2013-11-27 | 2015-12-02 | 北京金风科创风电设备有限公司 | A kind of concrete member mould and application thereof |
| CN203929768U (en) * | 2014-06-06 | 2014-11-05 | 东南大学 | A kind of mortar or only starch Comprehensive Crack-Resistance performance test apparatus |
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