CN207703694U - Cement treated material rapidly determining compaction degree instrument - Google Patents
Cement treated material rapidly determining compaction degree instrument Download PDFInfo
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- CN207703694U CN207703694U CN201721900539.8U CN201721900539U CN207703694U CN 207703694 U CN207703694 U CN 207703694U CN 201721900539 U CN201721900539 U CN 201721900539U CN 207703694 U CN207703694 U CN 207703694U
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- compaction degree
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Abstract
A kind of cement treated material rapidly determining compaction degree instrument, it is symmetrically set with 2 vertical poles in plate upper surface, the top of vertical pole is provided with top plate, guide cylinder is provided between top plate and bottom plate, it is provided with guide plate on front side of guide cylinder, limit hole is provided on guide plate, position-limit mechanism is arranged by limit hole on guide plate, it drops hammer and is arranged in guide cylinder and the top dropped hammer is in contact with position-limit mechanism, the lower part of vertical pole is provided with the wheel carrier of installation mobile wheel；The utility model have many advantages, such as reasonable design, it is simple in structure, can quickly carry out, is lossless, can promote the use of highway pavement cement treated material compactness measure field.
Description
Technical field
The utility model belongs to road, railway or bridge construction device or equipment technical field, and in particular to arrives a kind of public affairs
Road road surface cement treated material rapidly determining compaction degree instrument and assay method.
Background technology
The compactness of sub-surface is to ensure that the key of Pavement Condition, is also the important indicator of quality of road construction.
Detection methods of compaction degree currently used for cement treated material, which can be divided into, damages detection and non-destructive testing.
It includes sand replacement method and douche etc. to damage detection, and this kind of detection method needs are digged pit on subgrade and pavement to be measured to stone roller
Laminate layer bottom, title take the quality of sample, measure sample moisture content and volume, calculate wet density, wet density conversion calculated
Dry density is obtained, the practical compactness of subgrade and pavement filling material is finally calculated.Although principle is simple, operating process compared with
To be cumbersome, detection speed is slow, and wind and rain and construction machinery can all interfere experiment, influence test result.
Non-destructive testing includes Nucleus Density Apparatus method, Rayleigh waves method, the detection of machine-carried type compactness etc., and the above method can be surveyed quickly
Determine the compactness of filling material.Nucleus Density Apparatus has radioactivity, expensive, and cement treated material material is uneven, discrete type
Greatly, it Nucleus Density Apparatus and is not suitable for.Rayleigh waves method is sought according to medium compactness and the relationship of Rayleigh waves velocity of wave in the medium
Compactness, this method precisely, quickly but its hit shake equipment and complete machine it is more heavy, be unfavorable for improve efficiency.Machine-carried type compactness
Detection is according to the variation of the variation judgement soil compaction degree of a certain parameter of vibrated roller, and this method belongs to observational measurement, and
Since road roller influence depth is big, measured result cannot represent institute's making roadbed situation completely.
Since the method for non-destructive testing is there are limitation, construction party mainly uses sand replacement method to detect compacting at present
Degree, and cement treated material constantly hardens after adding water mix, has temporal requirement to compactness detection, it is steady in the hope of grasping water in time
Compactness of subbase information and carry out specific aim processing, and the place of digging pit also easily cause early stage road damage, therefore, lack one kind
Suitable method carries out cement treated material quick, lossless detection methods of compaction degree.
Invention content
The technical problem to be solved by the utility model is to overcome above-mentioned the deficiencies in the prior art, a kind of design conjunction is provided
It manages, is simple in structure, can quickly carry out, lossless cement treated material rapidly determining compaction degree instrument.
Solve above-mentioned technical problem the technical solution adopted is that：2 vertical poles are symmetrically set in plate upper surface,
The top of vertical pole is provided with top plate, and guide cylinder is provided between top plate and bottom plate, guide plate, guide plate are provided on front side of guide cylinder
On be provided with limit hole, position-limit mechanism is arranged by limit hole on guide plate, drops hammer and is arranged in guide cylinder and drops hammer upper
Portion is in contact with position-limit mechanism, and the lower part of vertical pole is provided with the wheel carrier of installation mobile wheel.
The guide plate of the utility model is U-shaped board, and limit hole is machined in the bottom and side wall of U-shaped board.
The position-limit mechanism of the utility model is：The peace adaptable with the limit hole on guide plate is provided on U-shaped fixed frame
Hole is filled, rectangular channel is symmetrically arranged on the madial wall of U-shaped fixed frame, baffle, the outer bottom of U-shaped fixed frame is installed in rectangular channel
It is provided with spring mounting plate, the both ends of spring mounting plate are both provided with spring, one end of spring is connected by rope with baffle,
The other end is fixed in knob fixed plate, and knob is provided in fixed plate of shaking hands.
The utility model drop hammer for：Hammer body upper surface middle part is provided with pull rod, and hammer body upper table surface pull rod both sides are provided with
Fixed link, clump weight pass through fixed link to be arranged on hammer body, and pull rod upper end is provided with limited block, and installation is provided at the top of limited block
Slot, acceleration transducer are arranged in mounting groove and are fixed by the fixed plate at the top of limited block, be arranged on limited block
There are dismountable gag lever post, hammer body lower part to be provided with elastic hammer head.
The geometry of the elastic hammer head of the utility model is hemispherical, a diameter of 80~90mm of hemispherical.
The both sides of the guide cylinder of the utility model are symmetrily processed with sliding slot, and gag lever post can slide in sliding slot.
The top plate of the utility model is linked together and is constituted by top plate top plate and top plate lower plywood, top plate lower plywood and top plate
The center of top plate is machined with top plate through-hole, and the aperture of top plate through-hole and the outer diameter of guide cylinder are adapted.
The bottom plate of the utility model is linked together and is constituted by bottom plate top plate and bottom plate lower plywood, and top plate top plate center adds
Work has top plate centre bore, the aperture of top plate centre bore and the outer diameter of guide cylinder to be adapted, and pad is machined on bottom plate lower plywood
Film trap, gasket are mounted in spacer groove；One end of the spacer groove is semi-circular groove, the other end is rectangular channel, semi-circular groove
Diameter and the diameter of gasket be adapted, the width of rectangular channel and the radius of gasket are adapted.
The gasket of the utility model is round rubber gasket or round rubber nylon Composition spacer.
It is provided with handle on the vertical pole of the utility model, push-pull rod is provided on top plate.
The utility model has the following advantages compared with the prior art：
1, detection device is more convenient, and data processing system concentrates in a babinet so that operating system is more saved
Space, operation are more convenient.
2, the position-limit mechanism of the utility model makes operator will need not drop hammer manually to maintain certain altitude, alleviates behaviour
The burden of author.
3, the utility model realizes required weight of dropping hammer using clump weight, and clump weight is semicircular structure, peace
Assembly and disassembly unload it is more convenient, the weight dropped hammer only need increase or reduce clump weight, control it is more flexible.
4, the outer diameter for reducing the internal diameter of guide cylinder and dropping hammer reduces the curvature for bottom of dropping hammer, and drops hammer falling state more
For stabilization, the stability of test result has been ensured.
5, it is provided with limit hole on guide plate, position-limit mechanism is fixed on to required height with screw threads for fastening connector, limited
This setup falling of to drop hammer of position mechanism is away from can effectively control.
6, the utility model carries out data processing using time-domain processing method, and extraction reflection shock response as much as possible adds
The useful information of speed characteristics and impact energy propagation law, and find out its regularity.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model one embodiment.
Fig. 2 is the left view of Fig. 1.
Fig. 3 is the vertical view of Fig. 2.
Fig. 4 is the structural representation that the utility model drops hammer.
Fig. 5 is the usage state diagram of the utility model.
Fig. 6 is the structural schematic diagram of position-limit mechanism in Fig. 1.
Fig. 7 is the structural schematic diagram of top plate 6 in Fig. 1.
Fig. 8 is the structural schematic diagram of bottom plate top plate 10-1.
Fig. 9 is the structural schematic diagram of bottom plate lower plywood 10-2.
To the test result of the framework compact type cement stabilized macadams of different compactnesss when Figure 10 uses different gaskets.
To the test result of the suspension compact-type cement stabilized macadams of different compactnesss when Figure 11 uses different gaskets.
Figure 12 is the analysis process figure of the utility model impulse response signal.
Figure 13 is the relational graph that the utility model impact vibration acceleration responsive signal changes over time.
In figure：1, mobile wheel；2, vertical pole；3, handle；4, guide plate；5, push-pull rod；6, top plate；7, position-limit mechanism；8、
Guide cylinder；9, wheel carrier；10, bottom plate；11, gasket；12, gag lever post；13, fixed plate；14, limited block；15, clump weight；16, solid
Fixed pole；17, hammer body；18, elastic hammer head；19, pull rod；6-1, top plate top plate；6-2, top plate lower plywood；7-1, U-shaped fixation
Frame；7-2, rope；7-3, baffle；7-4, spring mounting plate；7-5, spring；7-6, knob fixed plate；7-7, knob；10-1, bottom
Plate top plate；10-2, bottom plate lower plywood；A, limit hole；B, mounting groove；C, mounting hole；D, top plate through-hole；E, top plate center
Hole；F, spacer groove.
Specific implementation mode
The utility model is described in further details with reference to the accompanying drawings and examples, but the utility model is not limited to this
A little embodiments.
Embodiment 1
In Fig. 1~9, the utility model cement treated material rapidly determining compaction degree instrument is symmetrical in 10 upper surface of bottom plate
Be welded with 2 vertical poles 2, the top of vertical pole 2 is welded with top plate 6, the top plate 6 of the present embodiment by top plate top plate 6-1,
Top plate lower plywood 6-2 is linked together composition, and it is logical that the center of top plate lower plywood 6-2 and top plate top plate 6-1 is machined with top plate
Hole d, the aperture of top plate through-hole d are adapted with the outer diameter of guide cylinder 8, and bottom plate 10 is by bottom plate top plate 10-1 and bottom plate lower plywood
10-2 is linked together composition, and the centers top plate top plate 10-1 are machined with top plate centre bore e, the aperture of top plate centre bore e with
The outer diameter of guide cylinder 8 is adapted, and spacer groove f is machined on bottom plate lower plywood 10-2, one end of the spacer groove f of the present embodiment is half
Circular trough, the other end are rectangular channel, and the diameter of semi-circular groove is adapted with the diameter of gasket 11, width and the gasket 11 of rectangular channel
Radius be adapted, gasket 11 be mounted on spacer groove f in, further, gasket 11 be circular gasket, the gasket of the utility model
11, which may be used round rubber gasket, can also use round rubber nylon Composition spacer.It is welded between top plate 6 and bottom plate 10 solid
There are guide cylinder 8, the both sides of guide cylinder 8 to be symmetrily processed with sliding slot, gag lever post 12 can slide in sliding slot surely.8 front side weldering of guide cylinder
It connects and is fixed with guide plate 4, further, the guide plate 4 of the present embodiment is U-shaped board, is machined in the bottom and side wall of U-shaped board
Limit hole a, position-limit mechanism 7 are fixedly connected with screw threads for fastening connector on guide plate 4 by limit hole a, installation of dropping hammer
In guide cylinder 8 and gag lever post 12 is in contact with position-limit mechanism 7, and the lower weld of vertical pole 2 has the wheel of installation mobile wheel 1
Frame 9 is welded with handle 3 on vertical pole 2, is welded with push-pull rod 5 on top plate 6, and handle 3 and push-pull rod 5 are that operator is mobile and use
The present apparatus provides convenient.
The position-limit mechanism of this implementation is by U-shaped fixed frame 7-1, rope 7-2, baffle 7-3, spring mounting plate 7-4, spring 7-
5, knob fixed plate 7-6, knob 7-7 are connected and composed, and are machined on U-shaped fixed frame 7-1 and are fitted with the limit hole a phases on guide plate 4
The mounting hole c answered, U-shaped fixed frame 7-1 are fixedly connected with screw threads for fastening connector on guide plate 4, U-shaped fixed frame 7-1
Madial wall on be symmetrily processed with rectangular channel, baffle 7-3 is installed in rectangular channel, baffle 7-3 can slidably reciprocate in rectangular channel,
The outer bottom of U type fixed frames 7-1 is equipped with spring mounting plate 7-4, and the both ends of spring mounting plate 7-4 are mounted on spring 7-5,
One end of spring 7-5 is connected by rope 7-2 with baffle 7-3, the other end is fixed on knob fixed plate 7-6, and knob is fixed
Knob 7-7 is installed, the gag lever post 12 that when use drops hammer is placed on baffle 7-3, and operator pulls knob 7-7 to make on plate 7-6
Baffle 7-3 moves inward under the pulling force effect of spring 7-5, and gag lever post 12 is detached from baffle 7-3, is dropped hammer in gravity
Under fall.
The present embodiment drop hammer by gag lever post 12, fixed plate 13, limited block 14, clump weight 15, fixed link 16, hammer body 17,
Elastic hammer head 18, pull rod 19 connect and compose, and 17 upper surface middle part of hammer body is welded with pull rod 19,17 upper table surface pull rod two of hammer body
Side is welded with fixed link 16, and clump weight 15 can be placed on across fixed link 16 on hammer body 17 as needed, and clump weight 15 is designed to
Semicircular structure is easy for installation and removal, and 19 upper end of pull rod is fixed with limited block 14, and 14 top of limited block is machined with mounting groove
B, acceleration transducer are mounted in mounting groove b and are fixed by the fixed plate 13 mounted on 14 top of limited block, and acceleration passes
Sensor is connect by data line with data processing system, in order to save the data processing system concentrated setting of space the utility model
In a babinet, dismountable gag lever post 12 is installed on limited block 14,17 lower part of hammer body is equipped with elastic hammer head 18, this reality
It is hemispherical, hemispherical a diameter of 80mm or 90mm with novel 18 geometry of elastic hammer head.
The method and step that compactness of pavement is measured using above-mentioned cement treated material rapidly determining compaction degree instrument is as follows：
1) cart is moved to road surface to be measured.
2) it is put into and drops hammer in the circular through hole of top plate 6, position-limit mechanism 7 is fixed on required height with screw threads for fastening connector
Degree places acceleration transducer, connects circuit.
3) hold with a firm grip knob 7-7, baffle 7-3 retractions, and the gasket 11 fallen to along guide cylinder 8 on ground that drops hammer is simultaneously anti-upwards
Bullet, data processing case obtain acceleration maximum value x.
4) lift the gag lever post 12 to drop hammer, while the knob 7-7 that holds with a firm grip, baffle 7-3 retractions, by drop hammer lifting to position-limit mechanism
Knob 7-7 is unclamped in 7 top, and baffle 7-3 resets, fixed to drop hammer.
5) it repeats step 3) and obtains 3 acceleration value x 3 times with step 4), seek acceleration mean value
6) the compactness K on road surface is measured with sand replacement method (time-consuming, damages) on the road surface to be measuredi。
7) cement treated material rapidly determining compaction degree instrument is moved to next road surface to be measured.
Wherein, n is interpolating function number, and n+1 is the number demarcated to cement treated material.
9) after the calibration of compactness K and acceleration mean value x in step 1~8, you can by step 1~5 come by counting
The acceleration mean value x obtained according to treatment box calculates the compactness K (being not required to use sand replacement method again) on road surface to be measured.
It is the experimental result tested using the device of the utility model below.
Be 12cm using 4 kinds of diameters, thickness be respectively 5mm, 10mm, 15mm rubber sheet gasket and 5mm rubber sheet gaskets+
5mm nylon Composition spacers, Composition spacer are bonded using glue, are respectively designated as DP- 1, DP-2, DP-3, DP-4, each pad
Piece corresponds to one group of test specimen, and every group of test specimen includes 6 test specimens, and the compactness of test specimen is respectively 93%, 94%, 95%, 96%, 97%
With 98%, gasket is positioned in spacer groove, is allowed between guide cylinder and test specimen.
To the test result of the framework compact type cement stabilized macadam of different compactnesss when the different gaskets of use of table 1
The type of gasket influences test result very big it can be seen from Figure 10 and table 1, compared with other gaskets, uses
When DP-1, acceleration mean value and coefficient of standard deviation mean value are maximum, and related coefficient is minimum.Larger coefficient of standard deviation mean value means
Single layer sheet rubber cannot be effectively reduced the uneven influence with the close effect of hammer to test result in surface of cement stabilized macadam.Cause
This, after DP-1, the related coefficient between acceleration mean value and compactness is smaller.Compared to DP-1, the thickness of DP-2 obtains
It improves, acceleration mean value and coefficient of standard deviation mean value reduce, and related coefficient increases.Illustrate that the increase of spacer thickness can be certain
Improve the uneven influence degree with the close effect of hammer to test result in surface of cement stabilized macadam in degree.However it uses
After continuing increased DP-3 on the basis of DP-2, although acceleration mean value and coefficient of standard deviation mean value continue to reduce, phase relation
Number reduces.It is considered that the raising due to spacer thickness reduces the sensitivity of detection.Nylon sheet is harder than rubber, DP-4 be by
Nylon sheet and rubber meet.Below impact energy can be more delivered evenly to by the nylon sheet of top, while lower section
Sheet rubber can be contacted closely with cement stabilized macadam surface.To DP-4 can make to drop hammer the impact to cement stabilized macadam by
" point impact " is changed to " face impact ", so that the numerical value of coefficient of standard deviation mean value is minimum, lower coefficient of standard deviation mean value meaning
Taste the uneven influence with the close effect of hammer to test result in surface that cement stabilized macadam can be effectively reduced using DP-4.Separately
Outside, larger acceleration mean value explanation is so maintained at higher level using after DP-4, the sensitivity of detection is appointed.Therefore, it uses
After DP-4, the good relationship between acceleration mean value and the compactness of cement stabilized macadam.
To the test result of the suspension compact-type cement stabilized macadam of different compactnesss when the different gaskets of use of table 2
The type of gasket influences the test result of suspension compact-type cement stabilized macadam it can be seen from Figure 11 and table 2
It is equally very big.When using DP-1, acceleration mean value does not increase with the compactness of test specimen and is increased, and correlation between the two is very
It is weak.Larger coefficient of standard deviation mean value illustrates that single layer sheet rubber cannot be effectively reduced the table of suspension compact-type cement stabilized macadam
Face is uneven and hammers influence of the close effect to test result into shape.In general, the uniformity of suspension compact-type is better than framework compact
Type.Think, for suspension compact-type cement stabilized macadam, to hammer close effect into shape and play coefficient of standard deviation mean value larger effect.Using
After the DP-2 for increasing rubber sheet gasket thickness on the basis of DP-1, the cushioning effect of gasket increases, so that standard deviation system
Number mean value is decreased obviously, and the related coefficient between acceleration mean value and compactness is substantially increased, and has reached 0.847.Continue to increase
It after big rubber sheet gasket thickness, although coefficient of standard deviation mean value declines, is significantly reduced with brief acceleration mean value, illustrates to increase pad
Piece thickness can reduce the sensitivity of detection, and then related coefficient reduces.With the test to framework compact type cement stabilized macadam
Situation is the same, and the impact energy dropped hammer is changed into " face impact " by the nylon sheet of the upper ends DP-4 by " point impacts " when test, and
The sheet rubbers of the lower ends DP-4 and cement stabilized macadam intimate surface contact, the combination of nylon sheet and sheet rubber make impact energy compared with
To be delivered evenly on the steady test specimen of water of lower section, and then significantly reduce the surface of suspension compact-type cement stabilized macadam not
Influence of the uniform close effect of hammer to test result.And larger acceleration mean value shows that the sensitivity of detection is higher.
Based on test result, the utility model uses DP-4 type gaskets so that detecting instrument can roughly tell cement
The compactness of stabilization gravel test specimen.
The operation principle of the utility model is as follows：
The impulse response signal measured by the utility model experiment is a kind of firsthand information, it contains a large amount of letter
Breath, including useful signal and noise signal, are existed between true impact vibration signal, with true impact vibration signal
Certain difference, in order to obtain the true representation of impulse response signal from these original signals, using the analysis process of Figure 12
Figure is analyzed, therefrom the useful information of extraction reflection shock response acceleration characteristic and impact energy propagation law, and is found out
Its regularity, as shown in figure 12, impact acceleration response signal first indicates in the form of a voltage, by analog-to-digital conversion, converted
At digital signal, then digital signal is transferred to computer and is pre-processed, remove unnecessary interference component, then respectively into traveling wave
Conformal analysis or spectrum analysis obtain corresponding result.
The utility model carries out data processing using time-domain processing method, and the Time Domain Processing of impact vibration signal also known as rushes
Waveform analysis is hit, mainly the waveform analysis of impact vibration acceleration signal in the time domain is handled, is to be with time shaft t
Abscissa, acceleration of gravity A be ordinate, indicate impact vibration acceleration responsive signal (as unit of gravity acceleration g) with
The relationship of time change, as shown in figure 13, △ t=c-a expressions are dropped hammer the time collided with water stability detritus mixture, and compactness is worked as
Gao Shi, △ t are shorter, and peak value b is bigger；Compactness is smaller, and impact signal peak value is smaller, and △ t are longer.By collision rule it is found that
Signal before a and after c is interference signal, and Acquisition Instrument can be used and carry the effective surge waveform abc sections of progress signal point of software intercepts
Analysis.The Time Domain Analysis of the utility model extracts acceleration peak value from acceleration signal, it is contemplated that the discreteness of data,
The typical value of peak value is calculated according to statistical principle.Impact vibration Token Holder value has certain confidence interval, than flat
Mean value can more reflect most possible vibration amplitude in one group of data.Circular such as following formula：
Wherein, A indicates the acceleration typical value of one group of detection data,Indicate arithmetic average, n is data amount check；taFor
The coefficient changed with degree of freedom and fraction in distribution table, takes 99%, other standard highways for high-grade highway confidence interval
Value is 95%, and with every 5 data for one group in this experiment, therefore the guarantee rate coefficient that can be obtained at this time of tabling look-up is 1.6449；S is
Standard deviation indicates the dispersion degree of acceleration signal, enables AiIndicate that signal amplitude, the standard deviation calculation formula of typical value are：
Claims (10)
1. a kind of cement treated material rapidly determining compaction degree instrument, it is characterised in that：2 are symmetrically set in plate upper surface to indulge
The top of bar, vertical pole is provided with top plate, and guide cylinder is provided between top plate and bottom plate, guide plate is provided on front side of guide cylinder, leads
Limit hole is provided on plate, position-limit mechanism is arranged by limit hole on guide plate, drops hammer and is arranged in guide cylinder and drops hammer
Top be in contact with position-limit mechanism, the lower part of vertical pole is provided with the wheel carrier of installation mobile wheel.
2. cement treated material rapidly determining compaction degree instrument according to claim 1, it is characterised in that the guide plate is U-shaped
Plate is machined with limit hole in the bottom and side wall of U-shaped board.
3. cement treated material rapidly determining compaction degree instrument according to claim 2, it is characterised in that the position-limit mechanism is：
It is provided with the mounting hole adaptable with the limit hole on guide plate on U-shaped fixed frame, is symmetrical arranged on the madial wall of U-shaped fixed frame
There is rectangular channel, baffle is installed in rectangular channel, the outer bottom of U-shaped fixed frame is provided with spring mounting plate, and the two of spring mounting plate
End is both provided with spring, and one end of spring is connected by rope with baffle, the other end is fixed in knob fixed plate, and knob is solid
Knob is provided on fixed board.
4. cement treated material rapidly determining compaction degree instrument according to claim 1, it is characterised in that it is described drop hammer for：Hammer body
Upper surface middle part is provided with pull rod, and hammer body upper table surface pull rod both sides are provided with fixed link, and clump weight passes through fixed link setting hammering into shape
On body, pull rod upper end is provided with limited block, and mounting groove is provided at the top of limited block, and acceleration transducer is arranged in mounting groove simultaneously
It is fixed by the fixed plate at the top of limited block, dismountable gag lever post is provided on limited block, hammer body lower part is provided with
Elastic hammer head.
5. cement treated material rapidly determining compaction degree instrument according to claim 4, it is characterised in that the elastic hammer head
Geometry is hemispherical, a diameter of 80~90mm of hemispherical.
6. cement treated material rapidly determining compaction degree instrument according to claim 4, it is characterised in that the two of the guide cylinder
Side is symmetrily processed with sliding slot, and gag lever post can slide in sliding slot.
7. cement treated material rapidly determining compaction degree instrument according to claim 1, it is characterised in that the top plate is by top plate
Top plate and top plate lower plywood are linked together composition, and it is logical that the center of top plate lower plywood and top plate top plate is machined with top plate
Hole, the aperture of top plate through-hole and the outer diameter of guide cylinder are adapted.
8. cement treated material rapidly determining compaction degree instrument according to claim 1, it is characterised in that the bottom plate is by bottom plate
Top plate and bottom plate lower plywood are linked together composition, and top plate top plate center is machined with top plate centre bore, top plate centre bore
Aperture and the outer diameter of guide cylinder be adapted, be machined with spacer groove on bottom plate lower plywood, gasket is mounted in spacer groove；Described
One end of spacer groove is semi-circular groove, the other end is rectangular channel, and the diameter of semi-circular groove and the diameter of gasket are adapted, rectangular channel
Width and gasket radius be adapted.
9. cement treated material rapidly determining compaction degree instrument according to claim 8, it is characterised in that the gasket is circle
Rubber sheet gasket or round rubber nylon Composition spacer.
10. cement treated material rapidly determining compaction degree instrument according to claim 1, it is characterised in that be arranged on the vertical pole
There is handle, push-pull rod is provided on top plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721900539.8U CN207703694U (en) | 2017-12-29 | 2017-12-29 | Cement treated material rapidly determining compaction degree instrument |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721900539.8U CN207703694U (en) | 2017-12-29 | 2017-12-29 | Cement treated material rapidly determining compaction degree instrument |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108007861A (en) * | 2017-12-29 | 2018-05-08 | 长安大学 | Cement treated material rapidly determining compaction degree instrument |
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2017
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108007861A (en) * | 2017-12-29 | 2018-05-08 | 长安大学 | Cement treated material rapidly determining compaction degree instrument |
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