CN213580519U - Rebound testing device - Google Patents
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- CN213580519U CN213580519U CN202022404219.1U CN202022404219U CN213580519U CN 213580519 U CN213580519 U CN 213580519U CN 202022404219 U CN202022404219 U CN 202022404219U CN 213580519 U CN213580519 U CN 213580519U
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- 238000012360 testing method Methods 0.000 title claims abstract description 106
- 238000003860 storage Methods 0.000 claims abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 19
- 239000010959 steel Substances 0.000 claims description 19
- 238000004891 communication Methods 0.000 claims description 10
- 238000004140 cleaning Methods 0.000 claims description 7
- 239000012535 impurity Substances 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 43
- 238000010276 construction Methods 0.000 description 14
- 238000000034 method Methods 0.000 description 12
- 238000003892 spreading Methods 0.000 description 9
- 230000007480 spreading Effects 0.000 description 9
- 239000010426 asphalt Substances 0.000 description 8
- 238000010079 rubber tapping Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000010354 integration Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 238000004321 preservation Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 229920000742 Cotton Polymers 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 201000010099 disease Diseases 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
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Abstract
The utility model discloses a resilience testing device, install the sliding seat that can the horizontal slip on the work frame, the sliding seat slides along the X axle direction through first motor drive, install the mounting panel that can slide from top to bottom on the sliding seat, the resiliometer is fixed on the mounting panel, the mounting panel slides along the Z axle direction through second motor drive; the middle part of the workbench is of a groove structure for placing test blocks, slide rails are arranged on two sides of the workbench, and the workbench is driven by a third motor to slide on the slide rails along the Y-axis direction; the first motor, the second motor, the third motor and the resiliometer are electrically connected with the control module respectively, the control module is further electrically connected with a timer and a storage module, and the resiliometer can move to a specified position at specified time to test a rebound value. The application discloses resilience testing arrangement can the resilience value of automatic timing survey appointed area to can avoid the data deviation that the same point position tested repeatedly and led to.
Description
Technical Field
The utility model relates to a road engineering field, concretely relates to resilience testing arrangement.
Background
Along with the development of economic society, the more old and the more scarce the land resources are, especially in dense areas of cities and towns, the land resources are particularly precious; the infrastructure such as roads is a necessary channel for urban connection, and bridges are mostly adopted for constructing roads in dense urban areas in order to not occupy valuable land resources.
The bridge deck wholeization layer needs to be under construction after the frame roof beam is accomplished, because bridge deck construction processes are numerous, is difficult to guarantee in the work progress that the bridge deck wholeization layer of each construction section is pour at same time quantum, and this when having just caused construction superstructure, partial bridge deck wholeization layer health preserving time is long, and another partial bridge deck wholeization layer health preserving time is short.
The asphalt layer is additionally paved on the upper part of the conventional bridge deck integrated layer 7d after the pouring of the bridge deck integrated layer is finished, the upper structure can be additionally paved only when the bridge deck integrated layers of different sections meet the age of more than 7d in the construction process, and the method for determining the additional paving time is low in construction efficiency, increases the construction period and is very harsh on the engineering with short construction period.
Meanwhile, early diseases are generated after part of bridge deck paves and is installed after the vehicle is communicated, and the disease form is mainly that the asphalt layer falls off, and the investigation after the fact finds that the road section is additionally paved with an upper structure 1d after the construction of the bridge deck integrated layer is completed due to the vehicle communication task pressure, and the concrete surface layer is cracked due to rolling in the construction process, so that the asphalt layer and the concrete layer are not firmly bonded, and the asphalt layer falls off.
For the above reasons, it is necessary to quantitatively determine the surface condition of the deck integrated layer and determine the timing of overlaying the superstructure, but there is no targeted method at present.
SUMMERY OF THE UTILITY MODEL
To the above problem, the utility model aims at providing a stable in structure, resilience testing arrangement that can automatic repetition test resilience value.
In order to realize the technical purpose, the utility model discloses a scheme is: the rebound testing device comprises a control module, a resiliometer, a working frame and a working table, wherein a sliding seat capable of sliding horizontally is arranged on the working frame, the sliding seat is driven by a first motor to slide along the X-axis direction, an installation plate capable of sliding up and down is arranged on the sliding seat, the resiliometer is fixed on the installation plate, and the installation plate is driven by a second motor to slide along the Z-axis direction;
the middle part of the workbench is of a groove structure for placing test blocks, slide rails are arranged on two sides of the workbench, and the workbench is driven by a third motor to slide on the slide rails along the Y-axis direction;
the first motor, the second motor, the third motor and the resiliometer are electrically connected with the control module respectively, the control module is further electrically connected with a timer and a storage module, and the resiliometer can move to a specified position at specified time to test a rebound value.
Preferably, a cleaning module used for cleaning impurities on an elastic striking rod of the resiliometer is further arranged on one side of the workbench, and the cleaning module is formed by combining a driving motor and a brush head.
Preferably, the horizontal frame is further provided with a camera, the control module is provided with a communication module, the camera is electrically connected with the storage module, and the control module can be in communication connection with the server or the flat panel through the communication module.
Preferably, the groove structure at workstation middle part can place two or two above loads and have the steel examination mould of test block, the steel examination mould is formed by steel sheet processing, steel sheet thickness on the steel examination mould is no less than 2cm, and the steel examination mould is the open formula long square structure in top.
The utility model has the advantages that the resilience testing device can automatically and regularly measure the resilience value of the designated area and can avoid data deviation caused by repeated testing at the same point position; simultaneously because test time begins from 12 hours, easily stains the tapping rod when the concrete initial stage has not solidified, the device of this application can clean the tapping rod automatically, avoids the tapping rod to stain and leads to the deviation of result.
Drawings
Fig. 1 is a schematic structural diagram of the springback testing device of the present invention;
FIG. 2 is a graph showing the increase of the rebound value with age according to the first embodiment of the present invention;
FIG. 3 is a graph showing the increase of the rebound value with age according to the second embodiment of the present invention;
FIG. 4 is a graph showing the increase of the springback value of TABLE III according to the present invention with age;
FIG. 5 is a graph showing the increase of the rebound value with age according to the fourth embodiment of the present invention;
fig. 6 is a graph showing the increase of the rebound value with age according to the table five of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-6, a specific embodiment of the present invention is a rebound testing device, including a control module 1, a resiliometer 2, a working frame 3 and a working table 4, wherein a sliding seat 5 capable of sliding horizontally is installed on the working frame 3, the sliding seat 5 slides along the X-axis direction through the driving of a first motor, a mounting plate 6 capable of sliding up and down is installed on the sliding seat 5, the resiliometer 2 is fixed on the mounting plate 6, and the mounting plate 6 slides along the Z-axis direction through the driving of a second motor;
the middle part of the workbench 3 is provided with a groove structure 7 for placing test blocks, two sides of the workbench 4 are provided with slide rails 8, and the workbench 3 is driven by a third motor to slide on the slide rails 8 along the Y-axis direction;
the first motor, the second motor, the third motor and the resiliometer 2 are respectively electrically connected with the control module 1, the control module 1 is further electrically connected with a timer and a storage module, and the resiliometer 2 can move to a specified position at specified time to test a rebound value. This application adopts the mode that sets up the slide rail in workstation both sides, increases the holistic stability of workstation with the help of the weight of test block, and wherein the slip of workstation on the workstation can be for motor automatic movement, also can regularly remove by the manual work, and the workstation all keeps higher stability state when guaranteeing the test at every turn, and the test of guarantee resilience value is accurate.
In order to reduce interference and ensure that the resiliometer can automatically and normally operate, a cleaning module 9 for removing impurities on the bouncing rod 201 of the resiliometer 2 is further arranged on one side of the workbench 3, and the cleaning module 9 is formed by combining a driving motor 901 and a brush head 902. The initial concrete has not solidified completely yet, stains the impact rod very easily, if not in time clear up, can cause the influence to the test next time, can need not manual operation through the clearance module, accomplishes the clearance on impact rod surface automatically.
For convenient remote monitoring and management, the horizontal frame 3 is further provided with a camera 10, the control module is provided with a communication module 11, the camera 10 is electrically connected with the storage module, and the control module 1 can be in communication connection with a server or a flat panel through the communication module 11. The user need not on the scene, can just on time the value test of kick-backing of going on of punctuation for a long time, if find data unusual, can be through the long-range equipment condition of looking over of camera.
In order to facilitate operation, pollution to a workbench is reduced during test block manufacturing, two or more steel test molds loaded with test blocks can be placed in the groove structure 7 in the middle of the workbench 3, the steel test molds are machined from steel plates, the thickness of the steel plates on the steel test molds is not less than 2cm, and the steel test molds are of a long square grid structure with an open top. The test block is manufactured in a test mold, and is convenient to replace and clean.
The application resilience testing device is used for the method for measuring and calculating the time for additionally laying the asphalt layer on the integral layer of the bridge deck, and the method comprises the following specific steps:
firstly, manufacturing test blocks, namely, adopting bridge deck integrated layer in-situ concrete to form the test blocks with the length, width and height of 300 multiplied by 100mm, pouring the concrete into a steel test mold, and troweling the surface of the concrete after pouring is finished, wherein the number of the formed test blocks is not less than 2;
secondly, carrying out test block curing, namely putting the molded test block into a laboratory for standard curing, wherein the test block is not demoulded during curing, and after 12h, testing the rebound value of the concrete surface by using a rebound instrument, wherein the rebound value is used as a representative value of the surface hardness of the concrete;
thirdly, collecting data, equally dividing the surface of the test block into n test areas, bouncing the test areas once by a resiliometer every 12 hours, bouncing the test areas once by the same test point, calculating the average rebound value R of the test areasIiTaking an integer, wherein I is a test block serial number, I is a time serial number, if the test is carried out for 12h after molding, the test is marked as R11, and if the test is carried out for 24h, the test is marked as R12;
fourthly, calculating the maximum rebound value when the recorded RIiAre each independently of RIi-1、RIi-2When the difference value of (A) is less than or equal to 1, that is, when the rebound value is hardly changed, the experiment is stopped, and the final value R of the concrete surface hardness of the test block is calculated and recordedmaxWhen R is between all test blocksmaxWhen the difference is less than or equal to 2, the test is effective; otherwise, reshaping the test block, and repeating the test until the test block meets the requirements;
fifthly, testing on site, namely pouring the integrated layer of the bridge deck on site, ensuring that the mixing ratio of the integrated layer of the bridge deck is the same as that of the test block formed in the test room, paving and maintaining according to normal procedures, recording paving time, dividing two test areas on site, testing the length and width of each test area to be 300 multiplied by 300mm, and testing the rebound value P of the test position of the integrated layer of the bridge deck by using a resiliometer every 12 hours1iAnd P2iWhen the rebound value P1iAnd P2iIf the difference is less than or equal to 2, the test data is valid, otherwise, the test is carried out again, and the surface hardness P of the integral layer of the bridge deck isi＝(P1i+P2i)/2；
Sixthly, calculating the spreading time when P isiGreater than or equal to 0.8RmaxIn this case, the additional paving operation can be performed after 12i hours.
In order to better guide production and save time while ensuring quality, in the sixth step of measuring the spreading time, the specific spreading time calculation steps are as follows:
when P is presentiGreater than or equal to 0.8RmaxAnd P isi-1Less than or equal to 0.8RmaxThe spreading time T of the integrated layer of the bridge surface is ((0.8R)max-Pi-1)/(Pi-Pi-1) 12+12 (i-1). Through the formula, the more accurate paving time can be calculated, and the paving machine can work more efficiently while ensuring the quality.
And testing the rebound value in the third to fifth steps by adopting the standard regulation of rebound tester GB/T9138. In order to reduce errors occurring during the test, the third step calculates the average rebound value R of the test areaIiThen, removing 3-5 maximum values and 3-5 minimum values from n rebound values of the test area, and taking the average value of the rest rebound values as a representative value R of the surface hardness of the concrete of the test block at the momentIi。
In order to reduce errors occurring during the test, R is calculated in the fourth stepmaxWhen R is the average of the values of springback measured the last three timesmax。
In order to avoid different paving time caused by different materials, in the fifth step, the indoor test and the in-situ casting material are required to be ensured to be the same, when the source of stone, the raw materials such as cement and the like are changed and the mixing ratio is changed, the test according to the steps 1-4 is required to be carried out again, and the paving time is calculated again. I, manufacturing a standard test block to obtain a maximum rebound value R
The specific test steps and test data are as follows: and (3) taking the formed test blocks 1 and 2 of the bridge deck integrated layer concrete laboratory poured on the spot. The concrete test block is tested, and the test data is as follows:
TABLE 1 test Block rebound values
R18、R19And R110Difference between them is less than 1, R28、R29And R210Stopping the test when the difference is less than 1, and calculating the final hardness R1 and R2 of the test block 1 and the test block 2;
R1＝(RI10+RI9+RI8)/3＝(34+34+33)/3＝34
R2＝(R210+R29+R28)/3＝(34+34+33)/3＝34
the hardness R ═ R (R) of the concrete surface under the condition of the mixing ratio1+R2)/2＝34。
The rebound value of the concrete surface can be added and paved at the time of 0.8R-27
II, passing the maximum rebound value R and the field rebound value P1iAnd P2iCalculating the paving time, adopting the same mixing ratio, constructing in different environments and different seasons, and testing the paving time of the concrete surface:
the first embodiment is as follows:
1. in summer in certain areas of Guangdong, the daily average temperature is 20-25 ℃, the surface rebound value test of the integrated layer of the bridge deck is carried out on site, and the test data is as follows:
table 2: EXAMPLES surface rebound values for deck integration
As can be seen from Table 2, P4＝(P14+P24)/2＝26，P5＝(P15+P25) When the spreading time is T ═ 29, ((0.8R-P)i-1)/(Pi-Pi-1))*12+12*(i-1)＝((27-26) /(29-26))*12+12*4)＝4+48＝52h.
When the mixing proportion is adopted, the upper structure can be additionally paved 52 hours after the integral layer of the bridge deck is poured.
Example two:
2. the surface rebound value of the integrated layer of the bridge deck is tested on site at the daily average temperature of 0-5 ℃ in winter in certain areas of Guangdong by adopting the same mixture ratio, and the test data are as follows
Table 3: EXAMPLE two bridge deck integration layer surface rebound value
As can be seen from Table 3, P9＝(P19+P29)/2＝26，P10When the spreading time is (P110+ P210)/2 is 28, the spreading time is (0.8R-P)i-1)/(Pi-Pi-1) 12+12 (i-1) ((27-26)/(28-26)) +12 + 9) ═ 6+108 ═ 114h, when the mixing ratio is adopted, the superstructure can be paved after 114h after the deck integrated layer is poured, and because the cement concrete setting and hardening are greatly influenced by the temperature and humidity, the setting and hardening are faster as the temperature is higher, so that the construction in different seasons is realized, and the setting and hardening speeds are completely different along with the increase of the age period after the deck integrated layer is poured, so that the pavement timing of the superstructure is different.
Example three:
3. the same mixture ratio is adopted, the daily average temperature in winter in a certain area of Heilongjiang is-20-15 ℃, no measures are taken for heat preservation after field construction, the surface resilience value of the integrated layer of the bridge deck is tested, and the test data is as follows
Table 4: example surface rebound value of three-bridge face integration layer
As can be seen from Table 4, P16＝(P116+P216)/2＝26，P17＝(P117+P217) When the spreading time is T ═ 28, ((0.8R-P)i-1)/(Pi-Pi-1) 12+12 (i-1) ((27-26)/(28-26)) +12 + 16) ((6 + 192) ═ 198h. when the mixing ratio is adopted, the superstructure can be paved after 198h after the completion of the pouring of the integral bridge deck layer, so that in northern cold regions, the control is simply carried out by 7 days (namely 168 hours) qualitatively, in the case of severe external environment, the concrete setting and hardening speed is slow, the actual surface hardness cannot meet the requirement, and if the superstructure is paved for 7d according to the original specification, cracks are generated on the concrete surface, and the interlayer bonding between the asphalt layer and the integral bridge deck layer is influencedAnd (4) performance.
Example four:
4. for northern cold areas, when the bridge deck integrated layer is constructed in winter, when the concrete surface needs to be insulated, heat insulation measures such as covering cotton quilts can be adopted. In winter in certain area of Heilongjiang, the daily average temperature is-20-15 ℃, measures such as cotton quilt covering are taken on site to carry out heat preservation on the concrete surface, the surface resilience value test of the integrated layer of the bridge deck is carried out, and the test data are as follows
Table 5: example four bridge deck integration layer surface rebound value
As can be seen from Table 5, P10＝(P110+P210)/2＝26，P11＝(P111+P211) When the spreading time is T ═ 29, ((0.8R-P)i-1)/(Pi-Pi-1) 12+12 (i-1) ((27-26)/(29-26)) × 12+12 × 10) ═ 4+120 ═ 124h, the superstructure can be additionally laid after 124h after the completion of the casting of the deck integrated layer, and therefore, the timing of the additional laying of the deck integrated layer can be advanced after the heat preservation measures are taken.
Based on the above examples, it can be known that the currently adopted 7d method for judging the paving time is a qualitative judgment method, and that the condition of concrete setting and hardening is remarkably different in the broad breadth of China, large climate change, northern severe cold areas and southern high-temperature areas, summer construction and winter construction, and the influence of different proportions. The surface conditions of the integrated layer of the bridge deck are different in different seasons, different regions and different proportions along with the change rule of time. It is not appropriate to simply adopt qualitative time index to guide the asphalt layer to be paved. According to the method, data are collected through laboratory experiments to obtain the maximum rebound value of concrete with a specific proportion, then the real-time rebound value of a test position is obtained through field tests, and the proper paving time can be calculated through the rebound value and the maximum rebound value of the laboratory; the method obtains the field actual condition of the integral layer of the bridge deck, is not limited by regions and seasons, can accurately and quantitatively judge the paving opportunity of the asphalt layer, can effectively guide production work, can effectively avoid quality failure caused by too early paving, and can also effectively reduce unnecessary waiting time.
The resilience testing device can automatically measure the resilience value of the designated area at regular time, and can avoid data deviation caused by repeated testing at the same point position; simultaneously because test time begins from 12 hours, easily stains the tapping rod when the concrete initial stage has not solidified, the device of this application can clean the tapping rod automatically, avoids the tapping rod to stain and leads to the deviation of result.
The above, only do the preferred embodiment of the present invention, not used to limit the present invention, all the technical matters of the present invention should be included in the protection scope of the present invention for any slight modification, equivalent replacement and improvement of the above embodiments.
Claims (4)
1. Resilience testing arrangement, its characterized in that: the rebound tester comprises a control module, a resiliometer, a working frame and a working table, wherein a sliding seat capable of sliding horizontally is arranged on the working frame, the sliding seat is driven by a first motor to slide along the X-axis direction, a mounting plate capable of sliding up and down is arranged on the sliding seat, the resiliometer is fixed on the mounting plate, and the mounting plate is driven by a second motor to slide along the Z-axis direction;
the middle part of the workbench is of a groove structure for placing test blocks, slide rails are arranged on two sides of the workbench, and the workbench is driven by a third motor to slide on the slide rails along the Y-axis direction;
the first motor, the second motor, the third motor and the resiliometer are electrically connected with the control module respectively, the control module is further electrically connected with a timer and a storage module, and the resiliometer can move to a specified position at specified time to test a rebound value.
2. The rebound testing device according to claim 1, wherein: and a cleaning module used for cleaning impurities on the bouncing rod of the resiliometer is further arranged on one side of the workbench and is formed by combining a driving motor and a brush head.
3. The rebound testing device according to claim 1, wherein: the horizontal frame is further provided with a camera, the control module is provided with a communication module, the camera is electrically connected with the storage module, and the control module can be in communication connection with a server or a flat panel through the communication module.
4. The rebound testing device according to claim 1, wherein: the groove structure at workstation middle part can place two or two above loads and have the steel examination mould of test block, the steel examination mould is formed by steel sheet processing, steel sheet thickness on the steel examination mould is no less than 2cm, and the steel examination mould is the open type long square structure in top.
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| CN202022404219.1U CN213580519U (en) | 2020-10-26 | 2020-10-26 | Rebound testing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112161888A (en) * | 2020-10-26 | 2021-01-01 | 广东华路交通科技有限公司 | Rebound testing device and method for calculating time for additionally laying asphalt layer on integrated layer of bridge deck |
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2020
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112161888A (en) * | 2020-10-26 | 2021-01-01 | 广东华路交通科技有限公司 | Rebound testing device and method for calculating time for additionally laying asphalt layer on integrated layer of bridge deck |
| CN112161888B (en) * | 2020-10-26 | 2024-09-13 | 广东华路交通科技有限公司 | Rebound testing device and bridge deck integrated layer asphalt layer paving time measuring and calculating method |
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