CN109030795A - The testing equipment and test method of indoor test concrete mix lateral deformation amount - Google Patents
The testing equipment and test method of indoor test concrete mix lateral deformation amount Download PDFInfo
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- CN109030795A CN109030795A CN201810986404.0A CN201810986404A CN109030795A CN 109030795 A CN109030795 A CN 109030795A CN 201810986404 A CN201810986404 A CN 201810986404A CN 109030795 A CN109030795 A CN 109030795A
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- 239000000203 mixture Substances 0.000 title claims abstract description 60
- 238000012360 testing method Methods 0.000 title claims abstract description 46
- 238000010998 test method Methods 0.000 title claims abstract description 7
- 238000009415 formwork Methods 0.000 claims abstract description 17
- 238000010276 construction Methods 0.000 claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 15
- 239000010959 steel Substances 0.000 claims abstract description 15
- 238000005516 engineering process Methods 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims description 13
- 238000005259 measurement Methods 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 8
- 238000011156 evaluation Methods 0.000 claims description 7
- 238000005056 compaction Methods 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 241000274582 Pycnanthus angolensis Species 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 239000011087 paperboard Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 230000010355 oscillation Effects 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 4
- 238000004088 simulation Methods 0.000 abstract description 4
- 238000011160 research Methods 0.000 abstract description 3
- 238000009416 shuttering Methods 0.000 abstract 1
- 239000004568 cement Substances 0.000 description 11
- 239000000463 material Substances 0.000 description 11
- 239000002689 soil Substances 0.000 description 4
- 230000008602 contraction Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000012512 characterization method Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/38—Concrete; Lime; Mortar; Gypsum; Bricks; Ceramics; Glass
- G01N33/383—Concrete or cement
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- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The present invention discloses the testing equipment and test method of a kind of indoor test concrete mix lateral deformation amount, which includes cabinet, positioning plate, lateral scale and vertical scale；Cabinet is mainly made of bottom plate, left side wall, right side wall, preceding swivel plate, rear swivel plate；Bottom base plate is equipped with leveling plastic steel cushion block, and leveling plastic steel cushion block is equipped with spirit bubble；Positioning plate one end is equipped with circular hole, another end margin semicircle aperture, and centre is equipped with groove；Lateral scale is limited in the groove of positioning plate by cylinder bolt and is reciprocatingly slided；Vertical scale is equipped with 4, is separately mounted to four edges and corners of cabinet.The size of the lateral deformation quantity present invention is to lose side wall shuttering supporting after liquefaction property and vibration compacting of the form construction technology concrete after high frequency tamping of indoor simulation road surface when; the blank for only evaluating form concrete formwork erection characteristic in road by concrete slump consistency factor in the industry is compensated for, the progress of construction, scientific research and detection is greatly facilitated.
Description
Technical field
The invention belongs to civil engineering work technical fields, and in particular to a kind of indoor test concrete mix laterally becomes
The testing equipment and test method of shape amount lose side to Simulation evaluation road form concrete when closely knit through high frequency tamping
Under conditions of wall support, the formwork erection performance of concrete mix.
Background technique
Fill up the blank for evaluating and detecting road form concrete mixture formwork erection characteristic in the industry
Device, method of the China currently without detection evaluation pavement concrete mixture formwork erection stability.China Higher grade highway water
The making on cement concrete road surface mostly uses greatly form construction technology, the process specifications concrete have the lesser slump and
Preferable lateral deformation amount namely " formwork erection characteristic ".The formwork erection characteristic of concrete refers to: concrete mix by vibrating enough
Afterwards, the ability of plastic stage resistance to deformation (self gravity, internal stress etc.)；It is answered on mechanics by the surrender of concrete mix
Power, viscosity coefficient characterization, but measure more difficult, Vertical Settlement amount of the present invention by measurement vibration compacting mixture before and after demoulding
" formwork erection characteristic " is levied with lateral expansion scale, simply and intuitively characterizes mixture deformation quantity after losing skid plates support, it is entire to survey
Examination process has stronger specific aim and simulation such as form construction technology.By the above method in laboratory to mixed
Solidifying soil mixture formwork erection characteristic is judged in advance, so as to avoid general hardly possible finding the problem in time in the construction process
With the deficiency for being adjusted, improving.
In general, there may be collapsing, length, width are all likely to occur variation for concrete corner, and main cause is mixed
Solidifying soil can endlessly consume the water in concrete material during hydration reaction carries out, therefore can generate contraction, cement
Concrete material can be in moulding state after mix, have certain mobility, concrete edge under the influence of its self weight
It may collapse, both increase the artificial workload for receiving side, with the artificial increase for receiving face number, the cement to pave out is mixed
The flatness that solidifying soil surface edge is manually received at face is also poorer, affects the stability of cement concrete pavement driving and durable
Property.
At present in construction of cement concrete road surface, slding form operation has become its mainstream form of construction work.Slding form operation has
It moves the characteristics of forming, after paver, lateral template slips away therewith.Therefore the lateral slump size and concrete of concrete
Formwork erection characteristic relation after vibrating is close.
Summary of the invention
It is an object of the invention to be directed to the deficiencies in the prior art, a kind of indoor test concrete mixing is provided
The testing equipment and test method of object lateral deformation amount.Using testing equipment of the invention, laboratory mix former material can be passed through
Material, which test, to be determined its various index and improves to raw material, convenient for being tested in the construction process to find in time
Problem, and the indices measuring accuracy to formwork erection can be substantially improved in testing equipment of the invention, greatly facilitate and apply
Work, scientific research and the progress of detection.
To achieve the goals above, the invention adopts the following technical scheme:
A kind of testing equipment of indoor test concrete mix lateral deformation amount, including it is cabinet, positioning plate, lateral scale, perpendicular
To scale, high frequency tamping device and table tennis；The cabinet is the stainless steel cuboid for having bottom uncovered, mainly by bottom plate, a left side
Side wall, right side wall, preceding swivel plate, rear swivel plate composition；The left side wall, right side wall are respectively perpendicular and are weldingly fixed on bottom plate
The left and right sides；One end of the preceding swivel plate is hinged on the front side of left side wall or right side wall by hinge, and the other end is logical
It crosses on front side of the compartment hasp and right side wall or left side wall of stainless steel material and is connected；One end of the rear swivel plate passes through conjunction
Page is hinged on the rear side of left side wall or right side wall, and the other end is connected by compartment hasp with the rear side of right side wall or left side wall
It connects；The bottom base plate is equipped with leveling plastic steel cushion block, and leveling plastic steel cushion block is equipped with spirit bubble；The positioning plate is not
The square plate for steel material of becoming rusty, one end are equipped with circular hole, another end margin semicircle aperture, and centre is equipped with groove；The positioning plate
Rotary link is mounted on left side wall top center by fixing axle in top of the box, the i.e. round-meshed one end that sets of positioning plate,
Other end gear is buckled in right side wall top center；The lateral scale is the graduated Steel Ruler of mark, and in center scale
It is equipped with through-hole at position, is limited in the groove of positioning plate and is reciprocatingly slided by cylinder bolt；The lateral scale is with cylinder
Bolt is center of circle rotatable movement；The vertical scale is equipped with 4, is respectively and fixedly installed to four edges and corners of cabinet.
As a further explanation of the present invention, the preceding swivel plate, rear swivel plate lateral surface further respectively have it is stainless
The handle of steel material.
As the preferred embodiments of the invention, net long 550mm ± 5mm, clear span 300mm in the case of the cabinet ±
5mm, clear height 300mm ± 5mm, boxboard thickness are not less than 6mm；Wide 30mm ± the 3mm of the positioning plate, thickness 20mm ± 3mm and case
Body is the same as long；Hollow flute length 300mm, the width 16mm of positioning plate；Range 50mm, the precision 1mm of the lateral scale；Described is perpendicular
Range 300mm, precision 1mm to scale.
High frequency tamping device used in the present invention be tamping equipment commonly used in the art, and without do mechanical structure or
Improvement in terms of person's circuit theory, can be used directly；It can directly can commercially be obtained according to following products parameter.
High frequency tamping device is mainly made of high frequency vibrating tamper, time set and variable-frequency motor, 70 ± 2mm of high frequency vibrating tamper diameter, vibration
Dynamic power is not less than 0.2mm, maximum vibration frequency 220Hz not less than 5kw, amplitude.
As a further explanation of the present invention, the table tennis is closed light plastic ball, diameter 40mm.
In the present invention, cabinet be mainly testing equipment basic framework and left and right ends control concrete sample it is wide
The irremovable side plate of degree and length；When being tested, cabinet can guarantee the molding of concrete material, play template work
With.Preceding swivel plate, rear swivel plate are in closed state, and cabinet is circumferential closed cuboid at this time, have poured concrete, to mixed
After solidifying soil top surface leveling, i.e., then openable preceding swivel plate, rear swivel plate collapse situation to formwork erection corner and measure.
The value that collapses of fresh concrete test specimen corner, lateral scale can directly be measured using Steel Ruler in the lab using the present invention
It can be used to measure the cross-direction shrinkage of concrete sample, similarly, vertical scale and Steel Ruler are to measure different location concrete material
Expect the variation generated.
Present invention is mainly applied to vertical, the lateral contractions of the measurement concrete material in laboratory (or construction site)
Displacement and corner collapse degree, carry out Experimental Evaluation to the formwork erection characteristic of fresh concrete material.
A kind of test that the testing equipment using above-mentioned indoor test concrete mix lateral deformation amount is tested
Method, comprising the following steps:
1) experimental enviroment condition is 20 DEG C ± 5 DEG C of temperature, according to given concrete mix, disposable or repeatedly stirring, and mix
Object total amount is no less than 60 liters, and the total time repeatedly stirred is no more than 10min, and the net mixing time of single is no less than 90s；
2) cabinet is leveled by adjusting leveling plastic steel cushion block and spirit bubble, closes preceding swivel plate and rear swivel plate, and preceding
Swivel plate, rear swivel plate and bottom must not have the gap greater than 5mm；It is with a little concrete mix that 4 tablees tennis are equidistant
It is placed in bottom, table tennis is not less than 5cm away from case side wall；Positioning plate is rotated to cabinet, the concrete mixing that will be stirred
Object divides in two layers of loading cabinet, and first layer is cabinet 1/2, and with tamper from wall box to center, spiral shape is plugged and pounded under 50；
3) high frequency vibrating tamper is inserted vertically into cabinet, within the scope of 10 ± 5cm of wall panel, by second layer concrete mix
It is paved with cabinet, under plugging and pounding 50 to center convolution shape from wall box, then it is levelling with trowel；
4) start high frequency vibrating tamper, and start timing, vibrate 30s when slowly high frequency vibrating tamper should be proposed, when 35s, closes vibration
Switch, high frequency vibrating tamper should be extracted out from cabinet at this time, during which record the time at the top of table tennis emersion concrete mix, accurately
To 1s；
5) after vibrating, table tennis is detected, the trace of vibrating spear insertion is filled and led up with remaining concrete mix, and with smearing
Son is closed flat case inner concrete mixture top surface, and maximum height difference is not more than 10mm；By edges and corners (at 4) vertical scale, case is read
The maximum difference of the height of internal mixture, height is no more than 10mm, and takes its average value H1 to constrain preceding vibratory compaction height,
It is accurate to 1mm, stationary positioned plate to cabinet middle position, the lateral scale of rotation is vertical with positioning plate, and equidistant (spacing is preferably 3
~6cm) it is slided along groove, concrete mix transverse width at no less than 5 is read, takes its average value for vibration before constraint
Working width D1；
6) slowly snap lock is unclamped, rotates preceding swivel plate, rear swivel plate is fully deployed, entire net release process is no less than 15
Second, concrete drastic deformation caused by too fast release should be avoided；After concrete deformation tends towards stability (generally after 3min), use
Lateral scale loses the width after preceding swivel plate, the constraint of rear swivel plate according to the equidistant measurement concrete mix before constraint,
Value is no less than at 5, and average value is to lose width D 2 after constraint；With Steel Ruler measurement and positioning plate center ± 150mm model
It encloses interior mixture center and loses the height after constraint, value is no less than at 5, and taking its average value is to lose height value H2 after constraint；
7) lateral deformation amount is characterized as losing width deformation amount Δ D=D2-D1 after constraint and loses wide height settling amount after constraint
ΔH = H1-H2；
8) it evaluates, meets following three evaluation condition, then concrete liquefaction performance and formwork erection characteristic meet form construction technology and want
Ask: table tennis emersion surface sum in 35s is no less than 3；ΔH≤10mm；ΔD≤15mm.
In above-mentioned test, corresponding construction when intending slding form operation using the lateral slump consistancy test channel mould of cement concrete is special
Point.Using test apparatus two sides concrete turned-down edge height as the evaluation index of the lateral slump of cement concrete.Meanwhile in test
Concrete should adequately be vibrated, and after lateral template extraction, should be after concrete form stable, then measure two sides turned-down edge
Highly, for examining the lateral slump of plastic cement concrete.It is being taken out by the cement concrete in measured test instrument
The turned-down edge height of two sides after lateral template, characterized as index cement concrete formwork erection and quiet change characteristic.
Advantages of the present invention:
Structure is simple, test procedure simple possible；The lateral slump consistancy test of cement concrete can be carried out in the lab；It can also
Test is directly carried out with feeding at the construction field (site) and front and back side template can pull open, and greatly improves each technology of concrete formwork erection characteristic
The precise determination of index greatly facilitates the progress of construction, scientific research and detection；Concrete mix after vibration compacting,
Under the operating condition for losing the constraint of end side template, mixture lateral deformation amount is measured；The test is intended to simulation concrete mixture warp
Formwork erection state after slding form operation, by indoor test as a result, evaluation and selection are suitable for the concrete mixing of form construction technology
Object.
Detailed description of the invention
Fig. 1 is the main view of one embodiment of the invention.
Fig. 2 is the top view of one embodiment of the invention.
Appended drawing reference: 1- cabinet, 2- handle, the compartment 3- hasp, 4- hinge, 5- positioning plate, 6- transverse direction scale, 7- are vertically marked
Ruler, 8- level plastic steel cushion block, 9- spirit bubble.
Specific embodiment
The following further describes the present invention with reference to the drawings.
Embodiment: as shown in Figure 1 and Figure 2, a kind of testing equipment of indoor test concrete mix lateral deformation amount, packet
Include cabinet 1, positioning plate 5, lateral scale 6, vertical scale 7, high frequency tamping device and table tennis；The cabinet is to have bottom uncovered
Stainless steel cuboid, be mainly made of bottom plate, left side wall, right side wall, preceding swivel plate, rear swivel plate；The left side wall, the right side
Side wall is respectively perpendicular the left and right sides for being weldingly fixed on bottom plate；One end of the preceding swivel plate is hinged on left side by hinge 4
On the front side of wall or right side wall, the other end on front side of compartment hasp 3 and right side wall or left side wall by being connected；After described
One end of swivel plate is hinged on the rear side of left side wall or right side wall by hinge 4, and the other end passes through compartment hasp 3 and right side
It is connected on rear side of wall or left side wall；The bottom base plate is equipped with leveling plastic steel cushion block 8, and leveling plastic steel cushion block 8 is equipped with
Spirit bubble 9；The positioning plate 5 is square plate, and one end is equipped with circular hole, another end margin semicircle aperture, and centre is equipped with groove；
For 5 rotary link of positioning plate at 1 top of cabinet, i.e. the round-meshed one end that sets of positioning plate 5 is mounted on a left side by fixing axle
Side wall top center, other end gear are buckled in right side wall top center；The lateral scale 6 is to mark graduated steel plate
Ruler, and through-hole is equipped at the graduation position of center, it is limited in the groove of positioning plate 5 and is reciprocatingly slided by cylinder bolt；Institute
The lateral scale 6 stated is using cylinder bolt as center of circle rotatable movement；The vertical scale 7 is equipped with 4, is respectively and fixedly installed to case
Four edges and corners of body 1.The lateral surface of the preceding swivel plate, rear swivel plate further respectively has handle 2.
Net long 550mm, clear span 300mm, clear height 300mm in the case of the cabinet 1, boxboard thickness are not less than 6mm；Described
5 width 30mm of positioning plate, thickness 20mm and cabinet are the same as long；Hollow flute length 300mm, the width 16mm of positioning plate 5；The lateral mark
Range 50mm, the precision 1mm of ruler 6；Range 300mm, the precision 1mm of the vertical scale 7.
The high frequency tamping device is mainly made of high frequency vibrating tamper, time set and variable-frequency motor, high frequency vibrating tamper
Diameter 70mm, oscillation power are not less than 0.2mm, maximum vibration frequency 220Hz not less than 5kw, amplitude.The table tennis is
Closed light plastic ball, diameter 40mm.
The survey tested using the testing equipment of the indoor test concrete mix lateral deformation amount of above-described embodiment
Method for testing, comprising the following steps:
1) experimental enviroment condition is 20 DEG C ± 5 DEG C of temperature, according to given concrete mix, disposable or repeatedly stirring, and mix
Object total amount is no less than 60 liters, and the total time repeatedly stirred is no more than 10min, and the net mixing time of single is no less than 90s；
2) cabinet is leveled by adjusting leveling plastic steel cushion block and spirit bubble, closes preceding swivel plate and rear swivel plate, and preceding
Swivel plate, rear swivel plate and bottom must not have the gap greater than 5mm；It is with a little concrete mix that 4 tablees tennis are equidistant
It is placed in bottom, table tennis is not less than 5cm away from case side wall；Positioning plate is rotated to cabinet, the concrete mixing that will be stirred
Object divides in two layers of loading cabinet, and first layer is cabinet 1/2, and with tamper from wall box to center, spiral shape is plugged and pounded under 50；
3) high frequency vibrating tamper is inserted vertically into cabinet, within the scope of 10 ± 5cm of wall panel, by second layer concrete mix
It is paved with cabinet, under plugging and pounding 50 to center convolution shape from wall box, then it is levelling with trowel；
4) start high frequency vibrating tamper, and start timing, vibrate 30s when slowly high frequency vibrating tamper should be proposed, when 35s, closes vibration
Switch, high frequency vibrating tamper should be extracted out from cabinet at this time, during which record the time at the top of table tennis emersion concrete mix, accurately
To 1s；
5) after vibrating, the table tennis of emersion top surface is detected, fills and leads up vibrating spear insertion with remaining concrete mix
Trace, and it is closed flat case inner concrete mixture top surface with trowel, maximum height difference is not more than 10mm；By the vertical scale in edges and corners,
The height of mixture in cabinet is read, the maximum difference of height is no more than 10mm, and takes its average value H1 close for vibration before constraint
Real height, is accurate to 1mm, stationary positioned plate to cabinet middle position, and it is vertical with positioning plate to rotate lateral scale, equidistantly along
Concrete mix transverse width at no less than 5 is read in groove sliding, takes its average value for vibratory compaction width before constraint
D1；
6) slowly snap lock is unclamped, rotates preceding swivel plate, rear swivel plate is fully deployed, entire net release process is no less than 15
Second, concrete drastic deformation caused by too fast release should be avoided；After concrete deformation tends towards stability, with lateral scale according to about
Equidistant measurement concrete mix before beam loses the width after preceding swivel plate, the constraint of rear swivel plate, and value is no less than at 5,
Its average value is to lose width D 2 after constraint；With mixture center within the scope of Steel Ruler measurement and positioning plate center ± 150mm
Height after losing constraint, value are no less than at 5, and taking its average value is to lose height value H2 after constraint；
7) lateral deformation amount is characterized as losing width deformation amount Δ D=D2-D1 after constraint and loses wide height settling amount after constraint
ΔH = H1-H2；
8) it evaluates, concrete mix meets slipform process requirement: precondition are as follows: table tennis emersion surface sum in 35s
No less than 3, it is believed that concrete liquefaction performance meets form construction technology.
Claims (6)
1. a kind of testing equipment of indoor test concrete mix lateral deformation amount, it is characterised in that: including cabinet (1), determine
Position plate (5), lateral scale (6), vertical scale (7), high frequency tamping device and table tennis；
The cabinet is the stainless steel cuboid for having bottom uncovered, mainly by bottom plate, left side wall, right side wall, preceding swivel plate, back spin
Rotating plate composition；The left side wall, right side wall are respectively perpendicular the left and right sides for being weldingly fixed on bottom plate；The preceding swivel plate
One end is hinged on the front side of left side wall or right side wall by hinge (4), the other end by compartment hasp (3) and right side wall or
It is connected on front side of left side wall；After one end of the rear swivel plate is hinged on left side wall or right side wall by hinge (4)
On side, the other end on rear side of compartment hasp (3) and right side wall or left side wall by being connected；The bottom base plate is equipped with leveling
Plastic steel cushion block (8), leveling plastic steel cushion block (8) are equipped with spirit bubble (9)；
The positioning plate (5) is square plate, and one end is equipped with circular hole, another end margin semicircle aperture, and centre is equipped with groove；Institute
Positioning plate (5) rotary link stated at the top of cabinet (1), i.e. installed by fixing axle by the round-meshed one end that sets of positioning plate (5)
In left side wall top center, other end gear is buckled in right side wall top center；
The lateral scale (6) is to mark graduated Steel Ruler, and through-hole is equipped at the graduation position of center, passes through cylinder
Bolt is limited in the groove of positioning plate (5) and reciprocatingly slides；The lateral scale (6) is using cylinder bolt as the rotatable fortune in the center of circle
It is dynamic；
The vertical scale (7) is equipped with 4, is respectively and fixedly installed to four edges and corners of cabinet (1).
2. the testing equipment of indoor test concrete mix lateral deformation amount according to claim 1, it is characterised in that:
The lateral surface of the preceding swivel plate, rear swivel plate further respectively has handle (2).
3. the testing equipment of indoor test concrete mix lateral deformation amount according to claim 1, it is characterised in that:
Net long 550mm ± 5mm, clear span 300mm ± 5mm, clear height 300mm ± 5mm, boxboard thickness are not less than in the case of the cabinet (1)
6mm；Positioning plate (5) width 30mm ± 3mm, thickness 20mm ± 3mm and the cabinet is the same as long；The hollow flute length of positioning plate (5)
300mm, width 16mm；Range 50mm, the precision 1mm of the lateral scale (6)；The range of the vertical scale (7)
300mm, precision 1mm.
4. the testing equipment of indoor test concrete mix lateral deformation amount according to claim 3, it is characterised in that:
The high frequency tamping device is mainly made of high frequency vibrating tamper, time set and variable-frequency motor, and high frequency vibrating tamper diameter 70 ±
2mm, oscillation power are not less than 0.2mm, maximum vibration frequency 220Hz not less than 5kw, amplitude.
5. the testing equipment of indoor test concrete mix lateral deformation amount according to claim 3, it is characterised in that:
The table tennis is closed light plastic ball, diameter 40mm.
6. a kind of testing equipment using indoor test concrete mix lateral deformation amount as described in claim 1 is tried
The test method tested, which comprises the following steps:
1) experimental enviroment condition is 20 DEG C ± 5 DEG C of temperature, according to given concrete mix, disposable or repeatedly stirring, and mix
Object total amount is no less than 60 liters, and the total time repeatedly stirred is no more than 10min, and the net mixing time of single is no less than 90s；
2) cabinet is leveled by adjusting leveling plastic steel cushion block and spirit bubble, closes preceding swivel plate and rear swivel plate, and preceding
Swivel plate, rear swivel plate and bottom must not have the gap greater than 5mm；It is with a little concrete mix that 4 tablees tennis are equidistant
It is placed in bottom, table tennis is not less than 5cm away from case side wall；Positioning plate is rotated to cabinet, the concrete mixing that will be stirred
Object divides in two layers of loading cabinet, and first layer is cabinet 1/2, and with tamper from wall box to center, spiral shape is plugged and pounded under 50；
3) high frequency vibrating tamper is inserted vertically into cabinet, within the scope of 10 ± 5cm of wall panel, by second layer concrete mix
It is paved with cabinet, under plugging and pounding 50 to center convolution shape from wall box, then it is levelling with trowel；
4) start high frequency vibrating tamper, and start timing, vibrate 30s when slowly high frequency vibrating tamper should be proposed, when 35s, closes vibration
Switch, high frequency vibrating tamper should be extracted out from cabinet at this time, during which record the time at the top of table tennis emersion concrete mix, accurately
To 1s；
5) after vibrating, table tennis is detected, the trace of vibrating spear insertion is filled and led up with remaining concrete mix, and with smearing
Son is closed flat case inner concrete mixture top surface, and maximum height difference is not more than 10mm；By the vertical scale in edges and corners, reads in cabinet and mix
The height of object is closed, the maximum difference of height is no more than 10mm, and takes its average value H1 to constrain preceding vibratory compaction height, is accurate to
1mm, stationary positioned plate to cabinet middle position, the lateral scale of rotation is vertical with positioning plate, equidistantly slides along groove, reads
Concrete mix transverse width at no less than 5 is taken, takes its average value to constrain preceding vibratory compaction width D 1；
6) slowly snap lock is unclamped, rotates preceding swivel plate, rear swivel plate is fully deployed, entire net release process is no less than 15
Second, concrete drastic deformation caused by too fast release should be avoided；After concrete deformation tends towards stability, with lateral scale according to about
Equidistant measurement concrete mix before beam loses the width after preceding swivel plate, the constraint of rear swivel plate, and value is no less than at 5,
Its average value is to lose width D 2 after constraint；With mixture center within the scope of Steel Ruler measurement and positioning plate center ± 150mm
Height after losing constraint, value are no less than at 5, and taking its average value is to lose height value H2 after constraint；
7) lateral deformation amount is characterized as losing width deformation amount Δ D=D2-D1 after constraint and loses wide height settling amount after constraint
ΔH = H1-H2；
8) meet following three evaluation condition, then concrete liquefaction performance and formwork erection characteristic meet form construction technology requirement: table tennis
Pang ball emersion surface sum in 35s is no less than 3；ΔH≤10mm；ΔD≤15mm.
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| CN201810986404.0A CN109030795A (en) | 2018-08-28 | 2018-08-28 | The testing equipment and test method of indoor test concrete mix lateral deformation amount |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109521189A (en) * | 2018-12-25 | 2019-03-26 | 郑州大学 | A kind of experimental rig for inside concrete relative humidity measurement |
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