CN108663272A - A kind of pressure lever type measures the device and method of concrete demoulding performance - Google Patents
A kind of pressure lever type measures the device and method of concrete demoulding performance Download PDFInfo
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- CN108663272A CN108663272A CN201810477112.4A CN201810477112A CN108663272A CN 108663272 A CN108663272 A CN 108663272A CN 201810477112 A CN201810477112 A CN 201810477112A CN 108663272 A CN108663272 A CN 108663272A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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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
- G01N19/04—Measuring adhesive force between materials, e.g. of sealing tape, of coating
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0017—Tensile
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0025—Shearing
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Abstract
A kind of pressure lever type measures the device of concrete demoulding performance.Existing concrete demoulding method of evaluating performance there is a problem of not accurate enough, operating process complex steps and it is time-consuming and laborious, equipment is complicated and cost is high.Outer tube in concrete mold of the present invention is connected to by convex shoulder on the mounting hole of pedestal, silk plug is detachably connected with top board or lower platen respectively, the lower end of transmission rod is mutually adjacent to the top surface of silk plug, transmission rod upper end is connected by pressure sensor with the lower end of pressing piece, pressing piece upper end is detachably connected on compression bar, one end of compression bar is hinged on column, and the other end of compression bar is force side.F in the present invention1+G0The first cohesive force between lower platen and concrete, the area for measuring and recording lower platen are S1, first between lower platen and concrete bonds tensile stress sigmaT, lower platen is removed, weighs the weight G of lower platen again1, △ G=G1‑G0The adhesive capacity of concrete as on lower platen.The present invention is for measuring concrete demoulding performance.
Description
Technical field
Present invention relates particularly to the device and methods that a kind of pressure lever type measures concrete demoulding performance.
Background technology
Concrete parting agent refers to a kind of substance being applied to before concrete cast on construction template, so that after cast
Template is unlikely to be sticked on concrete surface, be not easy form removal, or influences the finish of concrete surface.Its main function is in mould
Plate and concrete surface formed a tunic the two is kept apart thus also known as interleaving agent.
Currently, China has formulated concrete product releasing agent standard JC/T949-2005, releasing agent quality evaluation refers to
Mark is main to consider that homogeneity and workability, homogeneity refer to density, viscosity, pH value, solid content or stability, application property
Can refer to the drying and forming-film time, demolding performace, water resistance, the action of rust to steel mold, ultimate-use (limiting service) temperature or other refer to
Mark.Demolding performace is the important indicator of releasing agent workability, in JC/T949-2005 concrete products in releasing agent standard,
Releasing agent demolding performace test method is given, it is specified that concrete mix, mold, maintenance process, standard suggestion are selected
Larger 100mm × the 100mm of area × 515mm concrete shrinkage die trials can also use the examination of 100mm × 100mm × 400mm
Mould, when detection, are molded one group of test specimen, shovel down the concrete material being adhered on bed die working face totally after 3 pieces, 24 hours with perching knife, receive
It weighs with scale after collection, the adhesive capacity of unit of account area, also special consideration should be given to die trial bed die uniform forces for test method, by other
Factor influence is small, with the adhesive capacity metrics evaluation demolding performace on bed die.
However, the weight of three test block concrete will fluctuate within the scope of 28Kg~38Kg, artificial form removal is needed, removes coagulation
Soil, due to adhesive capacity by form removal method, using tool, form removal exert oneself whether the influence of the factors such as uniform, it is not only time-consuming and laborious.It adopts
The difference between releasing agent can not accurately be evaluated with the method for adhesive capacity.And the size of concrete product ejection resistance, demoulding
The quality of concrete is determined by the cohesive force between concrete and releasing agent after complexity and demoulding, is bonded using measuring
The method of power more can accurately and reliably evaluate the demolding performace of releasing agent.
Japanese Y.Ohama etc. exists《Evaluation of Performance of Mold-Releasing Agents
for Polyester Resin Concrete》One text points out that polymer concrete is molded in semi-cylindrical die trial, due to poly-
Closing the huge drying shrinkage of object concrete leads to the separation with mold, can not obtain cohesive tensile stress and shear stress, in addition exist
Polymer concrete is inserted into the rod iron and steel plate of brushing releasing agent, and the evaluation of stripping result can not be obtained by being also due to drying shrinkage, most
Author points out that using automatic servo universal testing machine shear stress can be measured or bonds tensile stress afterwards, it is indicated that can comment well
The performance of valence releasing agent.Electro-hydraulic servo universal testing machine is expensive, complicated for operation, in addition, between concrete and template compared with
Low cohesive force is measured using electro-hydraulic servo universal testing machine and bonds tensile stress and bonding shear stress, test mould and instrument
Precision is required for redesigning and consider.Costly, equipment is complicated.
Invention content
It is existing to solve the object of the present invention is to provide the device and method that a kind of pressure lever type measures concrete demoulding performance
Concrete demoulding method of evaluating performance there is a problem of that not accurate enough, operation is time-consuming and laborious, equipment is complicated and cost is high.
The present invention adopts the technical scheme that solve above-mentioned technical problem：
A kind of pressure lever type measures the device of concrete demoulding performance, it includes pedestal, column, compression bar, pressing piece, pressure biography
Sensor, transmission rod, silk plug and concrete mold, the pedestal are horizontally disposed, column be set on the base vertically and its lower end with
Column is fixedly connected, and the mounting hole of cooperation concrete mold is machined on pedestal, the concrete mold includes outer tube, upper pressure
Plate, lower platen, inner sleeve, upper cover and lower cover, be provided on the outer wall of outer tube with the matched convex shoulder of mounting hole, outer tube is logical
It crosses convex shoulder to be connected on the mounting hole of pedestal, inner sleeve is in the inside of outer tube and the two is coaxially disposed, outer tube and inner sleeve
Concrete is provided between pipe, top board and lower platen are separately positioned on the both ends of outer tube, and the upper end of outer tube detachably connects
It is connected to upper cover, the lower end of outer tube is removably connected with lower cover, and silk plug is detachably connected with top board or lower platen respectively, power transmission
The lower end of bar is mutually adjacent to the top surface of silk plug, and the upper end of transmission rod is connected by pressure sensor with the lower end of pressing piece, is applied
The upper end of casting die is detachably connected on compression bar, and one end of compression bar is hinged on column, and the other end of compression bar is force side.
Preferably, pressing piece includes connecting rod and circular arc lid, and one end of connecting rod is detachably connected on compression bar,
The other end of connecting rod is provided with circular arc lid, and the arc tips of circular arc lid are recessed towards compression bar.
Preferably, top board is machined with first through hole along its thickness direction, and the inwall processing of first through hole has
One internal thread, lower platen are machined with the second through-hole along its thickness direction, the second internal thread, silk are machined on the inner wall of the second through-hole
Be machined on stifled outer wall respectively with the first internal thread and the matched external screw thread of the second internal thread, when silk plug and the second through-hole spiral shell
When line connects, transmission rod pushes lower platen by silk plug；When silk plug is threadedly coupled with first through hole, transmission rod passes through under silk plug
Press top board.
Preferably, mounting hole and the second through-hole are stepped hole, and mounting hole includes hole in the first lower opening and first,
Hole coaxial communication is arranged in first lower opening and first, and the internal diameter in hole reduces successively from bottom to up in the first lower opening and first, and second
Through-hole includes hole on the second lower opening and second, and hole coaxial communication is arranged in the second lower opening and second, in the second lower opening and second
The internal diameter in hole reduces successively from bottom to up, and the second internal thread of cooperation silk plug is machined on the inner wall of the second lower opening, hole on second
Setting is matched with transmission rod.
The method for measuring concrete demoulding performance using a kind of pressure lever type that specific implementation mode one is realized, by concrete mould
Tool is connect with lower cover, by the inner wall brushing releasing agent of top board, lower platen and outer tube, weighs lower platen and top board respectively
Initial weight is G0And GN, lower platen and inner sleeve are sequentially arranged in outer tube, it is mixed by being filled between outer tube and inner sleeve
Top board is mounted on concrete with pushing down concrete in mold, then is pressed on respectively with upper cover and lower cover by solidifying soil, vibration compacting
The both ends of concrete mold ensure that top board and lower platen are bonding with the concrete in concrete mold respectively, are marking
It is conserved under quasi- curing condition at least 24 hours；
After maintenance, upper cover and lower cover are disassembled from outer tube, after the second through hole installation silk plug of lower platen
It is placed on pedestal, the lower end of transmission rod is mutually adjacent to across inner sleeve with silk plug, the upper end of transmission rod is machined with by convex shoulder
The limiting slot of placement force sensor, the force side of hand moulded rod apply pressure vertically downward, record on pressure sensor at this time
The reading maximum value measured be F, plus after the weight of pressure sensor and transmission rod be F1, F1+G0For lower platen and coagulation
The first cohesive force between soil, the area for measuring and recording lower platen are S1, first between lower platen and concrete, which bonds drawing, answers
Power σT, σT=(F1+G0)/S1；Lower platen is removed, weighs the weight G of lower platen again1, △ G=G1-G0As coagulation on lower platen
The adhesive capacity of soil, with △ G/S1The adhesive capacity of unit area concrete is indicated to evaluate the performance of releasing agent；
Then, transmission rod is extracted, silk plug is disassembled from the second through-hole, and concrete mold is inverted, and makes top board
It is detachably connected at first through hole in mounting hole, then by silk plug, transmission rod passes through the second through-hole and the upper end with silk plug
It is mutually adjacent to, again the force side of hand moulded rod, applies pressure vertically downward, record the reading measured on pressure sensor at this time
Number maximum value is F, in addition being F after the weight of pressure sensor and transmission rod2, F2+GNSecond between top board and concrete is viscous
Tie tensile stress sigmat, the area for measuring and recording top board is S2, second between top board and concrete bonds tensile stress sigmat, σt
=(F2+GN)/S2；Top board is removed, weighs the weight G of top board again2, △ g=G2-GNConcrete is viscous as on top board
Attached amount, with △ g/S2The adhesive capacity of unit area concrete is indicated to evaluate the performance of releasing agent.Tensile stress sigma is bonded by oneTWith
Two bond tensile stress sigmatIt is averaged as mold-concrete binding tensile strength sigma test value, by △ G/S1With △ g/S2It makes even
Test value of the mean value as unit area concrete adhesive capacity △ G/S.
The invention has the advantages that：
1, compression bar, pressing piece, pressure sensor and transmission rod mutual cooperation are effectively simplified to concrete mould in the present invention
The force application structure of tool, force mechanism is simple and easy to operate, effective the step of simplifying measurement process, improves the efficiency of measurement, exerts a force
For single pressure mode, biasing effect is more direct, keeps the data of measurement and acquisition more accurate.
2, the present invention overcomes existing adherency quantity measuring method to be led by form removal tool, operating process factors such as irregular of exerting oneself
The problem of the demolding performace inaccuracy of cause, measurement structure of the present invention is simple and reasonable, and measurement method is easy to operate and accurate and reliable.
3, the configuration of the present invention is simple and operation directly it is reliable, can overcome it is existing using electro-hydraulic servo universal testing machine measure
Mold bonds tensile stress with sample room and bonds the problem that equipment in shear stress is expensive, test mould is complicated and cost is high.
Sampling test obtains through the invention, and cost of the invention is less than 400 yuan.
4, present invention design is simple, low cost, operation are easy, and can not only obtain concrete mold and sample room simultaneously
The adhesive capacity of adhesive tensile resistance intensity, unit area concrete, additionally it is possible to which two groups of mold-coagulations are obtained by a Measurement die
Native adhesive tensile resistance intensity, the adhesive capacity data of unit area concrete, measurement process is comprehensive, accurate, time saving and laborsaving, effectively saves
The time and efforts of survey crew is saved, the working efficiency for measuring solidifying native demolding performace is promoted, reduces the solidifying native demolding performace of measurement
Difficulty.
Description of the drawings
Fig. 1 is the front view structure diagrammatic cross-section of the present invention；
Fig. 2 is the front view structure diagrammatic cross-section of pedestal 1；
Fig. 3 is the front view structure diagrammatic cross-section of pressing piece 4；
Fig. 4 is the front view structure diagrammatic cross-section of concrete mold.
Specific implementation mode
In order to make the objectives, technical solutions and advantages of the present invention clearer, below by shown in the accompanying drawings specific
Embodiment describes the present invention.However, it should be understood that these descriptions are merely illustrative, and it is not intended to limit the model of the present invention
It encloses.In addition, in the following description, descriptions of well-known structures and technologies are omitted, to avoid unnecessarily obscuring the present invention's
Concept.
Here, it should also be noted that, in order to avoid having obscured the present invention because of unnecessary details, in the accompanying drawings only
It shows the structure and/or processing step closely related with scheme according to the present invention, and is omitted little with relationship of the present invention
Other details.
Specific implementation mode one：Illustrate that present embodiment, present embodiment include pedestal in conjunction with Fig. 1, Fig. 2, Fig. 3 and Fig. 4
1, column 2, compression bar 3, pressing piece 4, pressure sensor 5, transmission rod 6, silk plug 13 and concrete mold, 1 level of the pedestal are set
It sets, column 2 is vertically arranged on pedestal 1 and its lower end is fixedly connected with column 2, and cooperation concrete mold is machined on pedestal 1
Mounting hole 9, the concrete mold include outer tube 8-1, top board 8-2, lower platen 8-3, inner sleeve 8-4, upper cover 8-5 and
Lower cover 8-6 is provided on the outer wall of outer tube 8-1 and is blocked by convex shoulder 10 with 9 matched convex shoulder 10 of mounting hole, outer tube 8-1
It is connected on the mounting hole 9 of pedestal 1, inner sleeve 8-4 is in the inside of outer tube 8-1 and the two and is coaxially disposed, outer tube 8-1 and interior
Concrete is provided between casing 8-4, top board 8-2 and lower platen 8-3 are separately positioned on the both ends of outer tube 8-1, outer tube
The upper end of 8-1 is removably connected with upper cover 8-5, and the lower end of outer tube 8-1 is removably connected with lower cover 8-6, silk plug 13 respectively with
Top board 8-2 or lower platen 8-3 are detachably connected, and the lower end of transmission rod 6 is mutually adjacent to the top surface of silk plug 13, transmission rod 6 it is upper
End is connected by pressure sensor 5 with the lower end of pressing piece 4, and the upper end of pressing piece 4 is detachably connected on compression bar 3, compression bar 3
One end be hinged on column 2, the other end of compression bar 3 is force side.
Shape of the compression bar 3 along the cross section that 2 axial direction of column intercepts is square in present embodiment.Energy is arranged such
Upper end after enough making pressing piece 4 pass through compression bar 3 contacts when being connected with nut, is reliable and stable.
In present embodiment pressure sensor 5 be existing market salable item, be a kind of dynamometer, operation principle with
The prior art is identical.
Transmission rod 6 is the body of rod made of existing light-weight high-strength material in present embodiment.
Specific implementation mode two：Present embodiment is further limiting for specific implementation mode one, and pressing piece 4 includes connection
One end of bar 4-1 and circular arc lid 4-2, connecting rod 4-1 are detachably connected on compression bar 3, and the other end of connecting rod 4-1 is provided with circle
Arc lid 4-2, the bending direction of the arc tips of circular arc lid 4-2 are to be recessed towards compression bar.It is to ensure that camber screw, which is arranged, in pressing piece 4
In loading process, pressing piece 4 is contacted with pressure sensor 5 good and is exerted a force downwards along vertical direction compression bar 3 always.
Specific implementation mode three：Present embodiment is that specific implementation mode one or two further limit, top board 8-2 edges
Its thickness direction is machined with first through hole 11, and the inwall processing of first through hole 11 has the first internal thread, and lower platen 8-3 is along its thickness
Direction is machined with the second through-hole 12, and the second internal thread is machined on the inner wall of the second through-hole 12, is machined on the outer wall of silk plug 13
Respectively with the first internal thread and the matched external screw thread of the second internal thread, silk plug 13 is detachably connected at the second through-hole 12, when
When transmission rod 6 passes through first through hole 11, the upper end of silk plug 13 is mutually adjacent to the lower end of transmission rod 6.
Specific implementation mode four：Present embodiment is further limiting for specific implementation mode one, two or three, mounting hole 9
It is stepped hole with the second through-hole 12, mounting hole 9 includes hole 9-2, the first lower opening 9-1 and first on the first lower opening 9-1 and first
Upper hole 9-2 coaxial communications are arranged, and the internal diameter of hole 9-2 reduces successively from bottom to up on the first lower opening 9-1 and first, the second through-hole 12
Including hole on the second lower opening and second, hole coaxial communication is arranged in the second lower opening and second, and hole is interior in the second lower opening and second
Diameter reduces successively from bottom to up, and the second internal thread of cooperation silk plug 13 is machined on the inner wall of the second lower opening, Kong Yuchuan on second
Power bar 6 matches setting.
The structure of first through hole 11 is identical as the structure of the second through-hole 12 in present embodiment, and the two is symmetrical arranged, and second
The shape of through-hole 12 is provided with conducive to while coordinating silk plug 13 and transmission rod 6, can either realize effective connection with silk plug 13, moreover it is possible to
Enough it is that transmission rod 6 is provided across channel, is similarly arranged in the shape of first through hole 11.This outer installing hole 9 shape setting be for
It can coordinate lower cover 8-6 and concrete mold, both make Relatively orientation accurate and stable connection.While mounting hole 9
The handling for also facilitating concrete mold are arranged in shape.
Specific implementation mode five：Illustrate present embodiment in conjunction with Fig. 1 to Fig. 4, first by concrete mould in present embodiment
Tool is connect with lower cover 8-6, by the inner wall brushing releasing agent of top board 8-2, lower platen 8-3 and outer tube 8-1, weighs pushing respectively
The initial weight of plate 8-3 and top board 8-2 are G0And GN, lower platen 8-3 and inner sleeve 8-4 are sequentially arranged at outer tube 8-1
In, concrete will be filled between outer tube 8-1 and inner sleeve 8-4, top board 8-2 is mounted on concrete mould by vibration compacting
Concrete is pushed down in tool, then is pressed on the both ends of concrete mold respectively with upper cover 8-5 and lower cover 8-6, ensures top board 8-2
It is bonding with the concrete in concrete mold respectively with lower platen 8-3, it is conserved under the conditions of standard curing at least 24 hours；
After maintenance, upper cover 8-5 and lower cover 8-6 are disassembled from outer tube 8-1, by the second through-hole of lower platen 8-3
It is placed on pedestal 1 by convex shoulder 10 after silk plug 13 is installed at 12, the lower end of transmission rod 6 is passed through into inner sleeve 8-4 and silk plug 13
It is in contact, the upper end of transmission rod 6 is machined with the limiting slot of placement force sensor 5, the force side of hand moulded rod 3, vertically downward
Apply pressure, the reading maximum value measured recorded at this time on pressure sensor 5 is F, in addition pressure sensor 5 and transmission rod
It is F after 6 weight1, F1+G0The first cohesive force between lower platen 8-3 and concrete, measures and records the area of lower platen 8-3
For S1, first between lower platen 8-3 and concrete bonds tensile stress sigmaT, σT=(F1+G0)/S1；Lower platen 8-3 is removed, again
Weigh the weight G of lower platen 8-31, △ G=G1-G0The adhesive capacity of concrete on as lower platen 8-3, with △ G/S1Indicate unit
The adhesive capacity of mass concrete evaluates the performance of releasing agent；
Then, the lower end of transmission rod 6 and silk plug 13 are separated, concrete mold is inverted, top board 8-2 is made to be in peace
Fill hole 9 in, silk plug 13 is detachably connected at first through hole 11, transmission rod 6 pass through the second through-hole 12 and with the upper end of silk plug 13
It is mutually adjacent to, again the force side of hand moulded rod 3, applies pressure vertically downward, record measuring on pressure sensor 5 at this time
Reading maximum value is F, in addition being F after the weight of pressure sensor 5 and transmission rod 62, F2+GNBetween top board 8-2 and concrete
Second bond tensile stress sigmat, the area for measuring and recording top board 8-2 is S2, second between top board 8-2 and concrete glues
Tie tensile stress sigmat, σt=(F2+GN)/S2；Top board 8-2 is removed, weighs the weight G of top board 8-2 again2, △ g=G2-GNAs
The adhesive capacity of concrete on top board 8-2, with △ g/S2The adhesive capacity of unit area concrete is indicated to evaluate the property of releasing agent
Energy.Tensile stress sigma is bonded by oneTTensile stress sigma is bonded with secondtIt is averaged as mold-concrete binding tensile strength sigma experiment
Value, by △ G/S1With △ g/S2It is averaged the test value as unit area concrete adhesive capacity △ G/S.
The requirement of present invention reference concrete product releasing agent standard JC/T 949-2005, as △ G/S<5g/m2,
It can smoothly demould, corner angle are complete, and surface is smooth, meet the requirements.It is strong according to existing result of study mold-concrete binding tension
Spend σ≤1.2 × 10-3MPa shows concrete demoulding excellent performance.
Embodiment one：Outer tube 8-1 is a steel pipe with convex shoulder 10 in concrete mold, and internal diameter 200mm is highly
The outer diameter of 100mm, inner sleeve 8-4 are 50mm, and the weight summation of pressure sensor 5 and transmission rod 6 is 0.75Kg, first by coagulation
Clay model tool is connect with lower cover 8-6, and the inner wall brushing releasing agent of top board 8-2, lower platen 8-3 and outer tube 8-1 weigh respectively
The initial weight of lower platen 8-3 and top board 8-2 are G0=1.155kg and GN=1.157kg, by lower platen 8-3 and inner sleeve 8-
4 are sequentially arranged in outer tube 8-1, and concrete, vibration compacting, by top board will be filled between outer tube 8-1 and inner sleeve 8-4
8-2 is mounted on concrete and is pressed on concrete mold respectively with pushing down concrete in mold, then with upper cover 8-5 and lower cover 8-6
Both ends, ensure top board 8-2 and lower platen 8-3 it is bonding with the concrete in concrete mold respectively, in standard curing
Under the conditions of conserve at least 24 hours；
After maintenance, upper cover 8-5 and lower cover 8-6 are disassembled from outer tube 8-1, by the second through-hole of lower platen 8-3
It is placed on pedestal 1 by convex shoulder 10 after silk plug 13 is installed at 12, the lower end of transmission rod 6 is passed through into inner sleeve 8-4 and silk plug 13
It is in contact, the upper end of transmission rod 6 is machined with the limiting slot of placement force sensor 5, the force side of hand moulded rod 3, vertically downward
Apply pressure, it is F to record the reading maximum value measured on pressure sensor 5 at this time, and F=15.262N deducts pressure sensing
It is F after the weight of device 5 and transmission rod 61=15.262+0.75 × 9.8=22.612, first between lower platen 8-3 and concrete
Cohesive force F1+G0=33.931N, the area for measuring and recording lower platen 8-3 are S1=29437.5mm2, lower platen 8-3 and coagulation
First between soil bonds tensile stress sigmaT, σT=(F1+G0)/S1=1.15 × 10-3MPa；Lower platen 8-3 is removed, under weighing again
The weight G of pressing plate 8-31=1.1551Kg, △ G=G1-G0=0.0001Kg is the adhesive capacity of concrete on lower platen 8-3, single
The adhesive capacity △ G/S of position mass concrete1=3.4g/m2。
Then, the lower end of transmission rod 6 and silk plug 13 are separated, concrete mold is inverted, top board 8-2 is made to be in peace
Fill hole 9 in, silk plug 13 is detachably connected at first through hole 11, transmission rod 6 pass through the second through-hole 12 and with the upper end of silk plug 13
It is mutually adjacent to, again the force side of hand moulded rod 3, applies pressure vertically downward, record measuring on pressure sensor 5 at this time
Reading maximum value is F=14.421N, in addition being F after the weight of pressure sensor 5 and transmission rod 62=14.421+0.75 × 9.8
=21.771N, F2+GNThe second bondings of=21.771+1.157 × 9.8=33.11N between top board 8-2 and concrete, which is drawn, answers
Power σt, the area for measuring and recording top board 8-2 is S2=29437.5mm2, second between top board 8-2 and concrete bonds
Tensile stress sigmat, σt=(F2+GN)/S2=1.12 × 10-3MPa；Top board 8-2 is removed, weighs the weight G of top board 8-2 again2=
1.1570kg △ g=G2-GN=0 is the adhesive capacity of concrete on top board 8-2, the adhesive capacity △ g/ of unit area concrete
S2It indicates to evaluate the performance of releasing agent.
Tensile stress sigma is bonded by oneTTensile stress sigma is bonded with secondtIt is averaged as mold-concrete binding tensile strength
σ test values, σ=(σT+σt)/2=1.135 × 10-3MPa, by △ G/S1With △ g/S2It is averaged as unit area concrete
The test value of adhesive capacity △ G/S, △ G/S=△ G/S1+△g/S2=3.4/2=1.75g/m2, due to σ≤1.2 × 10-3MPa,
△G/S<5g/m2Show to show that the demolding performace of the releasing agent is good.
Claims (5)
1. a kind of pressure lever type measures the device of concrete demoulding performance, it is characterised in that：It includes pedestal (1), column (2), pressure
Bar (3), pressing piece (4), pressure sensor (5), transmission rod (6), silk plug (13) and concrete mold, the pedestal (1) are horizontal
Setting, column (2) is vertically arranged on pedestal (1) and its lower end is fixedly connected with column (2), and pedestal is machined with cooperation on (1)
The mounting hole (9) of concrete mold, the concrete mold include outer tube (8-1), top board (8-2), lower platen (8-3),
Inner sleeve (8-4), upper cover (8-5) and lower cover (8-6) are provided on the outer wall of outer tube (8-1) matched with mounting hole (9)
Convex shoulder (10), outer tube (8-1) are connected to by convex shoulder (10) on the mounting hole (9) of pedestal (1), and inner sleeve (8-4) is in outer
The inside of casing (8-1) and the two is coaxially disposed, concrete, top board are provided between outer tube (8-1) and inner sleeve (8-4)
(8-2) and lower platen (8-3) are separately positioned on the both ends of outer tube (8-1), and the upper end of outer tube (8-1) is removably connected with
Cover (8-5), the lower end of outer tube (8-1) is removably connected with lower cover (8-6), silk plug (13) respectively with top board (8-2) or under
Pressing plate (8-3) is detachably connected, and the lower end and the top surface of silk plug (13) of transmission rod (6) are mutually adjacent to, and the upper end of transmission rod (6) passes through
Pressure sensor (5) is connected with the lower end of pressing piece (4), and the upper end of pressing piece (4) is detachably connected on compression bar (3), pressure
One end of bar (3) is hinged on column (2), and the other end of compression bar (3) is force side.
2. a kind of pressure lever type according to claim 1 measures the device of concrete demoulding performance, it is characterised in that：Pressing piece
(4) include connecting rod (4-1) and circular arc lid (4-2), one end of connecting rod (4-1) is detachably connected on compression bar (3), connecting rod
The other end of (4-1) is provided with circular arc lid (4-2), and the arc tips of circular arc lid (4-2) are recessed towards compression bar (3).
3. a kind of pressure lever type according to claim 1 or 2 measures the device of concrete demoulding performance, it is characterised in that：On
Pressing plate (8-2) is machined with first through hole (11) along its thickness direction, and the inwall processing of first through hole (11) has the first internal thread, under
Pressing plate (8-3) is machined with the second through-hole (12) along its thickness direction, and the second internal thread is machined on the inner wall of the second through-hole (12),
Be machined on the outer wall of silk plug (13) respectively with the first internal thread and the matched external screw thread of the second internal thread, when silk plug (13) with
When second through-hole (12) is threadedly coupled, transmission rod (6) pushes lower platen (8-3) by silk plug (13)；When silk plug (13) and first
When through-hole (11) is threadedly coupled, transmission rod (6) pushes top board (8-2) by silk plug (13).
4. a kind of pressure lever type according to claim 3 measures the device of concrete demoulding performance, it is characterised in that：Mounting hole
(9) and the second through-hole (12) is stepped hole, and mounting hole (9) includes hole (9-2) in the first lower opening (9-1) and first, under first
Hole (9-2) coaxial communication is arranged on hole (9-1) and first, and the internal diameter in hole (9-2) is from bottom to up in the first lower opening (9-1) and first
Reducing successively, the second through-hole (12) includes hole on the second lower opening and second, and hole coaxial communication is arranged in the second lower opening and second,
The internal diameter in hole reduces successively from bottom to up in second lower opening and second, and cooperation silk plug (13) is machined on the inner wall of the second lower opening
Second internal thread, hole matches setting with transmission rod (6) on second.
5. the method for measuring concrete demoulding performance using a kind of pressure lever type that claim 3 is realized, it is characterised in that：By coagulation
Clay model tool is connect with lower cover (8-6), by the inner wall brushing releasing agent of top board (8-2), lower platen (8-3) and outer tube (8-1),
The initial weight for weighing lower platen (8-3) and top board (8-2) respectively is G0And GN, by lower platen (8-3) and inner sleeve (8-4)
It is sequentially arranged in outer tube (8-1), concrete will be filled between outer tube (8-1) and inner sleeve (8-4), vibration compacting will
Top board (8-2) is mounted on concrete and is pressed on respectively with pushing down concrete in mold, then with upper cover (8-5) and lower cover (8-6)
The both ends of concrete mold, ensure top board (8-2) and lower platen (8-3) respectively with the concrete phase in concrete mold
It bonds, is conserved under the conditions of standard curing at least 24 hours；
After maintenance, upper cover (8-5) and lower cover (8-6) are disassembled from outer tube (8-1), by the second of lower platen (8-3)
It is placed on pedestal (1) by convex shoulder (10) after silk plug (13) is installed at through-hole (12), the lower end of transmission rod (6) is passed through into inner sleeve
Pipe (8-4) is mutually adjacent to silk plug (13), and the upper end of transmission rod (6) is machined with the limiting slot of placement force sensor (5), hand pressure pressure
The force side of bar (3), applies pressure vertically downward, and the reading maximum value measured recorded at this time on pressure sensor (5) is
F, in addition being F after the weight of pressure sensor (5) and transmission rod (6)1, F1+G0Be lower platen (8-3) between concrete first
Cohesive force, the area for measuring and recording lower platen (8-3) are S1, first bonding of the lower platen (8-3) between concrete, which is drawn, answers
Power σT, σT=(F1+G0)/S1；Lower platen (8-3) is removed, weighs the weight G of lower platen (8-3) again1, △ G=G1-G0Under as
The adhesive capacity of concrete on pressing plate (8-3), with △ G/S1The adhesive capacity of unit area concrete is indicated to evaluate the property of releasing agent
Energy；
Then, transmission rod (6) are extracted, silk plug (13) disassembles from the second through-hole (12), concrete mold is inverted, is made
Top board (8-2) is in mounting hole (9), then silk plug (13) is detachably connected at first through hole (11), and transmission rod (6) is worn
It crosses the second through-hole (12) and is mutually adjacent to the upper end of silk plug (13), again the force side of hand moulded rod (3), apply pressure vertically downward
Power, the reading maximum value measured recorded at this time on pressure sensor (5) is F, in addition pressure sensor (5) and transmission rod
(6) it is F after weight2, F2+GNBe top board (8-2) between concrete second bonds tensile stress sigmat, measure and record pressure
The area of plate (8-2) is S2, second bonding tensile stress sigma of the top board (8-2) between concretet, σt=(F2+GN)/S2；It removes
Top board (8-2) weighs the weight G of top board (8-2) again2, △ g=G2-GNConcrete is viscous as on top board (8-2)
Attached amount, with △ g/S2The adhesive capacity of unit area concrete is indicated to evaluate the performance of releasing agent.Tensile stress sigma is bonded by oneTWith
Two bond tensile stress sigmatIt is averaged as mold-concrete binding tensile strength sigma test value, by △ G/S1With △ g/S2It makes even
Test value of the mean value as unit area concrete adhesive capacity △ G/S.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114061811A (en) * | 2021-11-15 | 2022-02-18 | 江苏万新光学有限公司 | Optical lens piece mould die sinking force measuring device |
| CN117949379A (en) * | 2024-03-27 | 2024-04-30 | 常州聚鸿环保科技有限公司 | Release agent quality testing device |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0890542A (en) * | 1994-09-28 | 1996-04-09 | Alpha Techno Co Ltd | Release agent for form |
| CN2650107Y (en) * | 2003-10-24 | 2004-10-20 | 刘庆兵 | Concrete pilot model |
| CN201460203U (en) * | 2009-08-27 | 2010-05-12 | 中化二建集团有限公司 | Concrete poured slip-form template |
| CN101819135A (en) * | 2010-05-13 | 2010-09-01 | 长沙理工大学 | Method for measuring bond strength between high-intensity glass fiber rib and concrete |
| CN103149094A (en) * | 2013-03-05 | 2013-06-12 | 华北水利水电学院 | Measuring method and device for tensile creep of early-age concrete |
| KR20150055781A (en) * | 2013-11-14 | 2015-05-22 | 한국건설기술연구원 | Apparatus and Method for tensile strength test of early age concrete |
| CN105181588A (en) * | 2015-10-21 | 2015-12-23 | 江苏城市职业学院 | Device for determining adhesive property of steel bars and concrete in extruding manner and testing method of device |
| CN205167178U (en) * | 2015-11-03 | 2016-04-20 | 中国水利水电第十二工程局有限公司 | Shedder of test piece |
| CN108037072A (en) * | 2017-12-23 | 2018-05-15 | 中冶建筑研究总院有限公司 | The measurement device and method of a kind of FRP tendons and Bond Performance Between Concrete |
-
2018
- 2018-05-18 CN CN201810477112.4A patent/CN108663272B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0890542A (en) * | 1994-09-28 | 1996-04-09 | Alpha Techno Co Ltd | Release agent for form |
| CN2650107Y (en) * | 2003-10-24 | 2004-10-20 | 刘庆兵 | Concrete pilot model |
| CN201460203U (en) * | 2009-08-27 | 2010-05-12 | 中化二建集团有限公司 | Concrete poured slip-form template |
| CN101819135A (en) * | 2010-05-13 | 2010-09-01 | 长沙理工大学 | Method for measuring bond strength between high-intensity glass fiber rib and concrete |
| CN103149094A (en) * | 2013-03-05 | 2013-06-12 | 华北水利水电学院 | Measuring method and device for tensile creep of early-age concrete |
| KR20150055781A (en) * | 2013-11-14 | 2015-05-22 | 한국건설기술연구원 | Apparatus and Method for tensile strength test of early age concrete |
| CN105181588A (en) * | 2015-10-21 | 2015-12-23 | 江苏城市职业学院 | Device for determining adhesive property of steel bars and concrete in extruding manner and testing method of device |
| CN205167178U (en) * | 2015-11-03 | 2016-04-20 | 中国水利水电第十二工程局有限公司 | Shedder of test piece |
| CN108037072A (en) * | 2017-12-23 | 2018-05-15 | 中冶建筑研究总院有限公司 | The measurement device and method of a kind of FRP tendons and Bond Performance Between Concrete |
Non-Patent Citations (3)
| Title |
|---|
| A. CARNOT ET AL.: "Corrosion mechanisms of steel concrete moulds in contact with a demoulding agent studied by EIS and XPS", 《CORROSION SCIENCE》 * |
| 杨英姿 等: "负温防冻剂混凝土的界面显微结构与性能", 《硅酸盐学报》 * |
| 柯余良: "绿色环保型水性脱模剂的研制与应用", 《新型建筑材料》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114061811A (en) * | 2021-11-15 | 2022-02-18 | 江苏万新光学有限公司 | Optical lens piece mould die sinking force measuring device |
| CN117949379A (en) * | 2024-03-27 | 2024-04-30 | 常州聚鸿环保科技有限公司 | Release agent quality testing device |
| CN117949379B (en) * | 2024-03-27 | 2024-06-04 | 常州聚鸿环保科技有限公司 | Release agent quality testing device |
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|---|---|
| CN108663272B (en) | 2020-06-26 |
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