CN2620270Y - Shear strength measurer for use between road surface structure layers - Google Patents
Shear strength measurer for use between road surface structure layers Download PDFInfo
- Publication number
- CN2620270Y CN2620270Y CN 03218800 CN03218800U CN2620270Y CN 2620270 Y CN2620270 Y CN 2620270Y CN 03218800 CN03218800 CN 03218800 CN 03218800 U CN03218800 U CN 03218800U CN 2620270 Y CN2620270 Y CN 2620270Y
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- shear strength
- test specimen
- pavement structure
- specimen box
- test
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Abstract
The utility model relates to a shear strength measuring machine used between road structure layers, which has a compact structure, complete functions and high testing precision and is easy to control and use. The utility model includes a test piece box, a positive pressure loading system is connected above the test piece box, one side of the test piece box is connected with a horizontal load loading system and a stress-strain test system, and a temperature control system is also provided on the test piece box.
Description
One, technical field:
The utility model relates to a kind of pavement structure interlayer tester for shear strength, and it is mainly used in the bonding force test of road surface structure interlayer.
Two, background technology:
Still there is not the instrument that is specifically designed to pavement material and the test of road structure interlayer bonding force at present both at home and abroad.There is the soil direct shear apparatus Geotechnical Engineering aspect, but test specimen is very little, uncontrollable normal pressure and test ambient temperature, and measuring accuracy is affected, so can not be generalized to the shearing strength test of pavement material and road structure interlayer.
Three, utility model content:
The utility model provides a kind of pavement structure interlayer tester for shear strength in order to solve the weak point in the above-mentioned background technology, and its compact conformation is multiple functional, and the measuring accuracy height is convenient to control, and is easy to use.
For achieving the above object, the technical solution adopted in the utility model is:
A kind of pavement structure interlayer tester for shear strength, its special character is: comprise the test specimen box, test specimen box top is connected with the normal pressure loading system, and test specimen box one side is connected with horizontal loading loading system and stress-strain test system, also is provided with temperature control system on the test specimen box.
Above-mentioned normal pressure loading system comprises the stabilizing hydraulic pressure device.
Above-mentioned horizontal loading loading system comprises variable-speed unit.
Above-mentioned stress-strain test system comprises the resistor straining testing device.
The said temperature control system comprises closed loop PID control device.
Above-mentioned test specimen box places on the reaction frame of normal pressure loading system, and the normal pressure loading system applies normal pressure by hydraulic servo.
Above-mentioned horizontal loading loading system is connected with the test specimen box by web member, applies horizontal loading by worm screw.
Above-mentioned stress-strain test system comprises the tension-compression sensor that is connected on the worm screw and the displacement transducer and the test macro thereof that are fixed on the test specimen box.
The said temperature control system comprises the stay-warm case that is installed on the test specimen box, feeds the air of steady temperature in the stay-warm case.
Compared with prior art, the advantage and the effect that the utlity model has are as follows:
1, the utility model modern design, compact conformation, multiple functional, functional, the measuring accuracy height is convenient to control, and is easy to use, can be widely used in the test of pavement material research and road surface structare layer.
2, the utility model sample dimensions is 30cm*30cm*20cm, is fit to pavement material and coarse particle material.
3, the utility model normal pressure has realized closed-loop control, and is adjustable continuously in 0～20 ton of scope, and control accuracy is 10KN.
4, the utility model shear rate is adjustable continuously in 0～20mm scope, and velocity control accuracy is 0.001mm.
5, the utility model ess-strain has been realized automatic collection, and the stress test precision is 0.0001KN, and the strain testing precision is 0.001mm.
6, the utility model has realized that temperature controls automatically, is particularly suitable for testing temperature-sensitive materials such as bituminous concrete, and temperature control precision is 1 ℃.
Four, description of drawings:
Accompanying drawing is a structure principle chart of the present utility model.
Five, embodiment:
Referring to accompanying drawing, the utility model comprises test specimen box 1, horizontal loading loading system 2, normal pressure loading system 3, stress-strain test system 4 and temperature control system 5, test specimen box 1 top is connected with normal pressure loading system 3, test specimen box 1 one sides are connected with horizontal loading loading system 2 and stress-strain test system 4, also are provided with temperature control system 5 on the test specimen box 1.Horizontal loading loading system 2 adopts variable-speed unit to make its shear rate adjustable, and horizontal loading loading system 2 is connected with the test specimen box by bolt, applies horizontal loading by worm screw.Normal pressure loading system 3 adopts the stabilizing hydraulic pressure technology to make its normal pressure realize closed-loop control, and test specimen box 1 places the reaction frame 6 of normal pressure loading system 3, applies normal pressure by hydraulic servo.Stress-strain test system adopts the resistor straining testing device to make it have enough picking rates and precision, and stress-strain test is to realize by being connected the tension-compression sensor on the worm screw and being fixed on the test specimen box 1 displacement transducer and test macro thereof.Temperature control system 5 adopts closed loop PID control device to make its temperature control have enough precision.Temperature control is on test specimen box 1 stay-warm case to be installed, and the air of feeding steady temperature is realized in the stay-warm case.
During real work, at first the test specimen of making is placed test specimen box 1, stay-warm case is installed, open 5 pairs of test specimens of temperature control system and carry out temperature control, carrying out the temperature controlled time approximately need be more than two hour.Be provided with and apply normal pressure then as requested, horizontal shear speed is set and connects horizontal loading loading system 2, open stress-strain test system 4, and open horizontal loading loading system 2.Experiment test begins, and when shear displacemant surpassed 1 centimetre and shearing force and begins to reduce, experimental test finished.Close horizontal loading loading system 2, and the removal horizontal loading, close stress-strain test system 4, close and the removal normal pressure closing temperature control system 5.
Claims (9)
1, a kind of pavement structure interlayer tester for shear strength, it is characterized in that: comprise test specimen box (1), test specimen box (1) top is connected with normal pressure loading system (3), test specimen box (1) one side is connected with horizontal loading loading system (2) and stress-strain test system (4), also is provided with temperature control system (5) on the test specimen box (1).
2, pavement structure interlayer tester for shear strength according to claim 1, it is characterized in that: described normal pressure loading system (3) comprises the stabilizing hydraulic pressure device.
3, pavement structure interlayer tester for shear strength according to claim 2, it is characterized in that: described horizontal loading loading system (2) comprises variable-speed unit.
4, pavement structure interlayer tester for shear strength according to claim 3, it is characterized in that: described stress-strain test system (4) comprises the resistor straining testing device.
5, pavement structure interlayer tester for shear strength according to claim 4, it is characterized in that: described temperature control system (5) comprises closed loop PID control device.
6, pavement structure interlayer tester for shear strength according to claim 5 is characterized in that: described test specimen box (1) places on the reaction frame (6) of normal pressure loading system (3), and normal pressure loading system (3) applies normal pressure by hydraulic servo.
7, pavement structure interlayer tester for shear strength according to claim 6 is characterized in that: described horizontal loading loading system (2) is connected with test specimen box (1) by web member, applies horizontal loading by worm screw.
8, pavement structure interlayer tester for shear strength according to claim 7 is characterized in that: described stress-strain test system (4) comprises the tension-compression sensor that is connected on the worm screw and the displacement transducer and the test macro thereof that are fixed on the test specimen box.
9, pavement structure interlayer tester for shear strength according to claim 8, it is characterized in that: described temperature control system (5) comprises the stay-warm case that is installed on the test specimen box, feeds the air of steady temperature in the stay-warm case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03218800 CN2620270Y (en) | 2003-04-24 | 2003-04-24 | Shear strength measurer for use between road surface structure layers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03218800 CN2620270Y (en) | 2003-04-24 | 2003-04-24 | Shear strength measurer for use between road surface structure layers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2620270Y true CN2620270Y (en) | 2004-06-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03218800 Expired - Fee Related CN2620270Y (en) | 2003-04-24 | 2003-04-24 | Shear strength measurer for use between road surface structure layers |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2620270Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103575644A (en) * | 2013-11-06 | 2014-02-12 | 中交第二航务工程局有限公司 | Test method for matching friction coefficient of contact surface of poured concrete |
| CN114047081A (en) * | 2021-09-02 | 2022-02-15 | 宁夏大学 | Method and device for determining critical thickness of structural asphalt layer |
-
2003
- 2003-04-24 CN CN 03218800 patent/CN2620270Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103575644A (en) * | 2013-11-06 | 2014-02-12 | 中交第二航务工程局有限公司 | Test method for matching friction coefficient of contact surface of poured concrete |
| CN103575644B (en) * | 2013-11-06 | 2016-04-27 | 中交第二航务工程局有限公司 | Coupling casting concrete surface of contact test method of friction coefficient |
| CN114047081A (en) * | 2021-09-02 | 2022-02-15 | 宁夏大学 | Method and device for determining critical thickness of structural asphalt layer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |