CN207923619U - A kind of pendulum-type impact instrument for testing road cementitious matter cohesive force - Google Patents
A kind of pendulum-type impact instrument for testing road cementitious matter cohesive force Download PDFInfo
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- CN207923619U CN207923619U CN201820282945.0U CN201820282945U CN207923619U CN 207923619 U CN207923619 U CN 207923619U CN 201820282945 U CN201820282945 U CN 201820282945U CN 207923619 U CN207923619 U CN 207923619U
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Abstract
The utility model discloses a kind of pendulum-type impact instrument for testing road cementitious matter cohesive force, including console, servo motor pendulum lifting device, pendulum, impact head, sliding rail, vice, impact peak value sensor, temperature control device, the console is connected by circuit with impact peak value sensor, temperature control device, servo motor pendulum lifting device, for the rotation angle, display impact absorbing energy and the impact flexibility that set pendulum, the relation curve for recording impact energy and time.The utility model is the instrument being detected in terms of resisting wheel load impact property to cementitious matter, can continuously do material in large quantities and carry out impact test.It can accurately detect impact energy and impact force of the different road surface cementitious matters under different temperatures environment, under different dynamic loadings, record the relation curve of impact energy and time, easy to operate, safe and reliable, work efficiency is high.
Description
Technical field
The utility model is related to a kind of pendulum-type impact instrument for testing road cementitious matter cohesive force, belong to testing of materials neck
Domain.
Background technology
The 80's of 20th century, with rapid economic development, China's expressway construction cause obtained rapid development so far.
By 2016, China's highway total kilometrage had reached 125373 kilometers, occupies first place in the world.However, due to heavy traffic
Effect and overloading take place frequently, the use function rapid decrease of bituminous paving, and it is serious to decay, such as antiskid performance, flatness
Energy, noise performance etc. seriously affect safety and the comfort of vehicle traveling.Highway in China has begun original construction
Main developing stage steps into the developing stage of paying equal attention to construction and maintenance, with the arriving in road maintenance epoch, road surface preventive maintenance
It emerges in large numbers in China like the mushrooms after rain.In pavement maintenance ＆ rehabilitation engineering, using thin overlay technology as the road surface of representative
Preventive maintenance is widely used, such as the technologies such as mist sealing, slurry seal, micro-surface area and thin overlay are extensive
Applied to maintenance of surface and maintenance engineering.But the thin layers maintenance technology effect such as mist sealing, slurry seal and micro-surface area is irregular,
Threshing, decortication and the earlier period damages such as loose happen occasionally.
Cementitious matter for Thin Pavement maintenance（Such as pitch）Selection depends on experience, therefore can not effectively control pre-
The design service life and DESIGN RELIABILITY of anti-property maintenance measure.Structural disease is more rare, focuses primarily upon threshing, decortication
It happens occasionally with earlier period damages such as bellding, has seriously affected the returns of investment of road surface preventive maintenance.However, due to it is existing with
Thin overlay technology is the road surface preventive maintenance and index and immature of representative.Up to the present, worldwide
There are no one, and the cementitious matter based on road surface performance selects and assessment indicator system and method.
Existing needle penetration staging hierarchy, viscosity classification system, PG is classified the pavement performance for highlighting pitch, i.e., in specification
In consider high temperature, low temperature, fatigue, anti-aging, working security and operability comprehensively, have no for decortication, threshing disease.
For the thin overlay of mist sealing, micro-surface area and ultrathin overlay class, the cementitious matter index system based on pavement performance is without clear needle
Cause the quality of thin overlay irregular when carrying out design asphalt selection using it directive significance of property, decortication, threshing
Equal unstructuredness disease emerges one after another.
For thin overlay class maintenance technology, since the form of expression major embodiment of its disease is in threshing, decortication, pine
It dissipates, therefore is based on pavement performance（High-temperature stability, low-temperature cracking-resistance, tired crack resistance）Cementitious matter index system it is less suitable
For thin overlay structure.The damage of thin overlay structure is not structural damage, but surface property is decayed, and threshing takes off
The disease causes such as skin, loose, pit slot are mainly the water stability and antistrip performance deficiency and asphalt and aggregate of thin overlay
Adhesion property is closely related.Therefore the cementitious matter index based on surface property should carry out the Adhesion property research of asphalt and aggregate.
The Adhesion property of asphalt and aggregate is influence factor more crucial in thin overlay technology pitch index choosing, is sticked
The quality and the water stability and antistrip performance of thin overlay of attached performance are closely related, and directly influence the clothes of thin overlay
Use as a servant performance and service life.Many scholars are the study found that there are certain compatibilities, i.e. asphalt and aggregate between asphalt and aggregate
Between to stick be selective, therefore should focus on preferred bitumen-aggregate adhesion and water when carrying out raw material design
Stability preferably combines.However, at present《Highway engineering pitch and Asphalt Mixture Experiment regulation》（JTG E20-2011）In
The water-boiling method of the evaluation asphalt and aggregate adhesion of implementation, though operation is simple and convenient, experiment is time-consuming short, subjectivity is too strong,
Test result is only capable of doing qualitative evaluation, it is therefore desirable to a kind of experiment side for capableing of accurate quantification cementitious matter and the Adhesion property that gathers materials
Method.
Utility model content
The purpose of this utility model is the defect and deficiency for prior art index, provides a kind of simple applicable, operation
Reliable road cementitious matter cohesive force pendulum-type impact instrument.This method can under accurate simulation different temperatures environment, do not go the same way with gathering materials
Type and different vehicle axis are carried under speed per hour, and the impact force that wheel road pavement applies, test is not gone the same way with cementitious matter cohesive force.
The purpose of this utility model can be achieved by following technology：
A kind of pendulum-type impact instrument for testing road cementitious matter cohesive force, including console, servo motor pendulum are promoted
Device, one end are fixed on the pendulum that the servo motor pendulum lifting device output end can rotate in a circumferential direction, are fixed on the pendulum
The impact head of free end is slidably arranged in vice below the servo motor pendulum lifting device by sliding rail, is located at
In the vice and sliding on the left of vice and sliding rail and with the impact peak value sensor of the unstressed contact of the vice, cover
Temperature control device on track, the console are promoted by circuit and impact peak value sensor, temperature control device, servo motor pendulum
Device is connected, rotation angle, display impact absorbing energy and impact flexibility, record impact energy and time for setting pendulum
Relation curve.
Further, it is provided on the servo motor pendulum lifting device for setting and showing that the initial of pendulum is released
Put the pointer of the final position after position and impact.
Further, ranging from 0~180 ° of the swing angle of the pointer.
Further, ranging from -10 DEG C~80 DEG C of the temperature setting of the temperature control device.
Further, the temperature control device includes temperature sensor, cold and hot wind apparatus, cold-hot heat preservation lid, the temperature
Degree sensor is located above vice, and for detecting the temperature in cold-hot heat preservation lid, the cold and hot wind apparatus is located in front of vice, uses
In controlling the temperature in cold-hot heat preservation lid, the cold-hot heat preservation lid described in the cold-hot heat preservation lid is hinged on by the way that hinge is openable and closable
In front of the vice, for closely covering in vice, sliding rail and cold and hot wind apparatus.
Further, it is equipped with linkage between the cold-hot heat preservation lid and pendulum, is used for when pendulum declines and impacts,
Make cold-hot heat preservation lid around 180 ° of openings of the hinge.
Further, it is additionally provided with replaceable counterweight on the swing rod of the pendulum, by increasing counterweight on swing rod,
The weight of pendulum is adjusted, to change impact force when declining, simulates the brake impact force under different speed per hours.
Further, further include protective cover, the protective cover is covered in the servo motor pendulum lifting device, tiger
It clamps, on temperature control device, the test block being broken after wound when for preventing pendulum from declining extraneous people or object and recycling Charpy impact.
Compared with prior art, the utility model has the following advantages：
One, the test method of the utility model is surveyed with device by the brake impact process of simulated driving vehicle road pavement
It tries cementitious matter and does not go the same way to use the cohesive force gathered materials and temperature variation curve, to evaluate cementitious matter used in surface sealing or upper layer
It is not going the same way with the adhesive property under Aggregate Type, is being provided newly for the wear-resisting property and quality durability of surface sealing or upper layer
Technical evaluation index.
Two, the utility model can simulate the vehicle brake impact effect under different speed per hours, simulated environment and realistic situation
It is closer to, strong applicability is simple in structure, and test specimen is simple for production, strong operability.
Three, the glue after impact force and Charpy impact when the utility model is declined using impact peak value sensor actual measurement pendulum
Ramming material cohesive force converts computational methods compared to only with energy, and this method accuracy, objectivity are strong, being capable of Accurate Determining
The cohesive force of cementitious matter after the blow, the adhesive property of objective evaluation different type cementitious matter.
Four, it is -10~80 DEG C that the cold and hot wind apparatus of the utility model, which can control cold-hot heat preservation lid temperature range, temperature control
Section is larger, can simulate temperature change of the most area road surface in annual range.
Description of the drawings
Fig. 1 is the main structure diagram of the pendulum-type impact instrument of the utility model embodiment.
Fig. 2 is the dimensional structure diagram (being free of protective cover) of the pendulum-type impact instrument of the utility model embodiment.
Fig. 3 is the structural schematic diagram of the test specimen of the utility model embodiment.
Fig. 4 is the Charpy impact schematic diagram of the utility model embodiment.
In figure：1- impact heads；2- pendulums；3- pointers；4- servo motor pendulum lifting devices；5- protective covers；6- test blocks；7-
Vice；8- consoles；9- temperature sensors；10- impact peak value sensors；The cold and hot wind apparatus of 11-；12- sliding rails；13- is cold
Hot insulation cover；The upper small test blocks of 14-；Small test block under 15-；16- cementitious matters.
Specific implementation mode
Specific embodiment of the present utility model is explained in detail above in association with attached drawing.
As depicted in figs. 1 and 2, a kind of pendulum-type impact instrument for testing road cementitious matter cohesive force, including protective cover 5,
Console 8, servo motor pendulum lifting device 4, one end is fixed on 4 output end of servo motor pendulum lifting device can be circumferential
The pendulum 2 of rotation, the impact head 1 for being fixed on 2 free end of the pendulum are slidably arranged in the servo electricity by sliding rail 12
The vice 7 of the lower section of machine pendulum lifting device 4, positioned at vice 7 and 12 left side of sliding rail and with 7 unstressed contact of the vice
Impact peak value sensor 10, the temperature control device covered on the vice 7 and sliding rail 12, the protective cover 5 cover
Servo motor pendulum lifting device 4, vice 7, on temperature control device.It is additionally provided with replaceable weight on the swing rod of the pendulum 2
Code.The vice 7 is for fastening test block 6.The console 8 passes through circuit and impact peak value sensor 10, temperature control device, servo
Motor pendulum lifting device 4 is connected, rotation angle, display impact absorbing energy and impact flexibility, record for setting pendulum 2
The relation curve of impact energy and time.
The initial release position for setting and showing pendulum 2 is provided on the servo motor pendulum lifting device 4
With the pointer 3 of the final position after impact, ranging from 0~180 ° of the swing angle of the pointer 3.
Ranging from -10 DEG C~80 DEG C of the temperature setting of the temperature control device, including temperature sensor 9, cold and hot wind apparatus 11,
Cold-hot heat preservation lid 13, the temperature sensor 9 is located at 7 top of vice, described for detecting the temperature in cold-hot heat preservation lid 13
Cold and hot wind apparatus 11 is located at the front of vice 7, for controlling the temperature in cold-hot heat preservation lid 13, described in the cold-hot heat preservation lid 13
Cold-hot heat preservation lid 13 is hinged on 7 front of the vice by the way that hinge is openable and closable, for closely covering in vice 7, sliding rail
On road 12 and cold and hot wind apparatus 11.
In addition, being equipped with linkage between the cold-hot heat preservation lid 13 and pendulum 2, it is used for when pendulum 2 declines and impacts,
Make cold-hot heat preservation lid 13 around 180 ° of openings of the hinge.
It is combined as shown in figure 3, the test block 6 is upper small test block 14 and lower lab scale 15, brushing cementitious matter between two small specimens
16, and vernier caliper is equipped between upper small test block 14 and lower lab scale 15,16 thickness of cementitious matter can be accurately set, and 6 material of test block is gold
Belong to test block or pavement stone test block, such as basalt test block, limestone test block, diabase test block etc..
As shown in figure 4, pendulum-type impact instrument impact schematic diagram is in such a way that pendulum 2 freely discharges, impact head hits examination
The small test block 14 of the upper surface of block 6, the impact energy and impact force that acquisition cementitious matter 16 is broken.
A kind of test method using the pendulum-type impact instrument, including step：
1）By cementitious matter 16 brush test block 6 upper small test block 14 and under among small test block 15,14 He of small test block in bonding
Under small test block 15, and by vernier caliper set cementitious matter 16 thickness, after its completely solidification or solidification after be mounted on vice 7 in
And test block 6 is fastened, wherein small test block 15 under 7 fastenings of vice, upper small test block 14 is exposed on vice 7.
2）Cold-hot heat preservation lid 13 is closed, cold and hot wind apparatus 11 is opened by console 8, adjusts the temperature in cold-hot heat preservation lid
Degree carries out air bath 4h after temperature stabilization to test block 6.
3）By increasing counterweight on swing rod or adjusting the angle of pendulum 2, to simulate the brake impact force under different speed per hours,
Then pendulum 2 is discharged by console 8, it is synchronous to open cold-hot heat preservation lid 13, realize impact head 1 to the upper small test block in test block 6
14 hit, and test impact force when pendulum 2 declines using impact peak value sensor 10, are surveyed and are hit using temperature sensor 9
When cementitious matter 16 temperature, this step tests the relation curve of the impact energy and time at a set temperature of cementitious matter 16, impact
The relation curve of power and time.
4）Repeat step 2）With 3）, the relation curve of the impact energy and time of test cementitious matter 16 at different temperatures, most
The change curve of cementitious matter 16 cohesive force and temperature is determined eventually.
5）Repeat step 2）、3）With 4）, the impact energy and the relationship of time that can test cementitious matter 16 in different test blocks 6 be bent
Line, it is final to determine the change curve that do not go the same way with cementitious matter 16 cohesive force and temperature under gathering materials, with evaluate surface sealing or on
Cementitious matter 16 used in the layer of face is not being gone the same way with the adhesive property under Aggregate Type, be surface sealing or upper layer wear-resisting property and
Quality durability provides new technical evaluation index.
Shaping method of specimen in the pendulum-type impact instrument of the utility model is with reference to highway engineering pitch and asphalt
Testing regulations》（JTG E20-2011）The forming method of middle asphalt and aggregate adhesion experiment, but be made that a certain extent
It improves, the block that will gather materials is customized to cube block, and cementitious matter is bonded among the block that gathers materials, and cementitious matter thickness is determined by vernier caliper
Degree, to simulate cementitious matter film forming thickness, energy to failure when test specimen is destroyed is defined as the cohesive force of cementitious matter, as quantitative assessment
The evaluation index of cementitious matter and adhesion of gathering materials.
Meanwhile vehicle is shown in the process of moving by Mechanical Calculation and Analysis, road surface top surface is suffered under braking state
Impact force is maximum, and the destruction of road pavement is the most serious, and cohesive force of the cementitious matter under impact load is horizontal.Therefore the utility model
A kind of pendulum-type impact instrument for testing road cementitious matter cohesive force proposed, by the way of Charpy impact test specimen, accurately
The brake impact force of simulating wheel road pavement is tested under different temperatures environment, is not gone the same way with Aggregate Type and different vehicle axis
Cementitious matter cohesive force under load and speed per hour is provided with the foundation of assessment indicator system for the cementitious matter selection based on surface property and is ground
Study carefully direction.
Above in association with attached drawing to it is described be only preferred embodiments of the present invention, but the utility model and unlimited
In the above embodiment, it is noted that for a person skilled in the art, in the premise for not departing from the utility model structure
Under, various modifications and improvement can also be made, these should also be considered as the scope of protection of the utility model, these are not all interfered with
The effect and patent practicability that the utility model is implemented.
Claims (8)
1. a kind of pendulum-type impact instrument for testing road cementitious matter cohesive force, it is characterised in that：
Including console（8）, servo motor pendulum lifting device（4）, one end be fixed on the servo motor pendulum lifting device
（4）The pendulum that output end can rotate in a circumferential direction（2）, be fixed on the pendulum（2）The impact head of free end（1）, pass through sliding rail
（12）It is slidably arranged in the servo motor pendulum lifting device（4）The vice of lower section（7）, be located at vice（7）And sliding rail
（12）Left side and with the vice（7）The impact peak value sensor of unstressed contact（10）, cover in the vice（7）And sliding
Track（12）On temperature control device, the console（8）Pass through circuit and impact peak value sensor（10）, temperature control device, servo
Motor pendulum lifting device（4）It is connected, for setting pendulum（2）Rotation angle, display impact absorbing energy and impact flexibility,
Record the relation curve of impact energy and time.
2. the pendulum-type impact instrument according to claim 1 for testing road cementitious matter cohesive force, it is characterised in that：It is described
Servo motor pendulum lifting device（4）On be provided with for setting and showing pendulum（2）Initial release position and impact after
Final position pointer（3）.
3. the pendulum-type impact instrument according to claim 2 for testing road cementitious matter cohesive force, it is characterised in that：It is described
Pointer（3）Ranging from 0~180 ° of swing angle.
4. the pendulum-type impact instrument according to claim 1 for testing road cementitious matter cohesive force, it is characterised in that：It is described
Ranging from -10 DEG C~80 DEG C of the temperature setting of temperature control device.
5. the pendulum-type impact instrument according to claim 1 for testing road cementitious matter cohesive force, it is characterised in that：It is described
Temperature control device include temperature sensor（9）, cold and hot wind apparatus（11）, cold-hot heat preservation lid（13）, the temperature sensor（9）
Positioned at vice（7）Top, for detecting cold-hot heat preservation lid（13）Interior temperature, the cold and hot wind apparatus（11）Positioned at vice（7）
Front, for controlling cold-hot heat preservation lid（13）Interior temperature, the cold-hot heat preservation lid（13）The cold-hot heat preservation lid（13）It is logical
Cross that hinge is openable and closable to be hinged on the vice（7）Front, for closely covering in vice（7）, sliding rail（12）With it is cold
Hot air apparatus（11）On.
6. the pendulum-type impact instrument according to claim 5 for testing road cementitious matter cohesive force, it is characterised in that：It is described
Cold-hot heat preservation lid（13）With pendulum（2）Between be equipped with linkage, in pendulum（2）When declining impact, make cold-hot heat preservation
Lid（13）Around 180 ° of openings of the hinge.
7. the pendulum-type impact instrument according to claim 1 for testing road cementitious matter cohesive force, it is characterised in that：It is described
Pendulum（2）Swing rod on be additionally provided with replaceable counterweight.
8. the pendulum-type impact instrument according to claim 1 for testing road cementitious matter cohesive force, which is characterized in that also wrap
Include protective cover（5）, the protective cover（5）It covers in servo motor pendulum lifting device（4）, vice（7）, on temperature control device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820282945.0U CN207923619U (en) | 2018-02-28 | 2018-02-28 | A kind of pendulum-type impact instrument for testing road cementitious matter cohesive force |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820282945.0U CN207923619U (en) | 2018-02-28 | 2018-02-28 | A kind of pendulum-type impact instrument for testing road cementitious matter cohesive force |
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| CN207923619U true CN207923619U (en) | 2018-09-28 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108204927A (en) * | 2018-02-28 | 2018-06-26 | 华南理工大学 | A kind of pendulum-type impact instrument and test method for being used to test road cementitious matter cohesive force |
| CN114577999A (en) * | 2022-05-09 | 2022-06-03 | 北京建筑大学 | Method for detecting activation effect of asphalt activator |
-
2018
- 2018-02-28 CN CN201820282945.0U patent/CN207923619U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108204927A (en) * | 2018-02-28 | 2018-06-26 | 华南理工大学 | A kind of pendulum-type impact instrument and test method for being used to test road cementitious matter cohesive force |
| CN108204927B (en) * | 2018-02-28 | 2024-02-20 | 华南理工大学 | Pendulum type impact instrument for testing binding force of cementing material for road and testing method |
| CN114577999A (en) * | 2022-05-09 | 2022-06-03 | 北京建筑大学 | Method for detecting activation effect of asphalt activator |
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