CN209803147U - Rubber asphalt elasticity recovery rate testing arrangement - Google Patents
Rubber asphalt elasticity recovery rate testing arrangement Download PDFInfo
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- CN209803147U CN209803147U CN201920555719.XU CN201920555719U CN209803147U CN 209803147 U CN209803147 U CN 209803147U CN 201920555719 U CN201920555719 U CN 201920555719U CN 209803147 U CN209803147 U CN 209803147U
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- rubber asphalt
- recovery rate
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- roof
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Abstract
The utility model discloses a rubber asphalt elasticity recovery rate testing arrangement, including the activity backing plate, the activity backing plate cooperatees with the ductility appearance, the activity backing plate includes roof, first riser and second riser, and wherein first riser and second riser are fixed in the bottom of roof respectively, are provided with scale and central positioning mark on the roof, and the locating hole has been seted up to the position at four angles of roof, and the device can avoid the sample possible to disturb down and warp, and is convenient for read the sample and return the deformation volume that contracts, and can used repeatedly.
Description
Technical Field
the utility model belongs to the technical field of road engineering test equipment, a rubber asphalt elasticity recovery rate testing arrangement is related to.
Background
The rubber asphalt is modified asphalt prepared by adding 20-60 meshes of recycled tire rubber powder which is not less than 15 percent (accounts for the mass ratio of the matrix asphalt) into the matrix asphalt. The widely adopted wet rubber asphalt process needs to continuously stir rubber powder and matrix asphalt at high temperature, after full development, the rubber powder particles absorb light oil in the asphalt to melt and expand, so that the viscosity and stiffness of an asphalt binder are improved, and meanwhile, the elastic rubber powder particles also endow the asphalt with excellent deformation recovery capability.
The elastic recovery rate is the percentage of the total deformation of the asphalt standard sample which can be recovered and deformed after being stretched to a certain length, and is one of the important characterization indexes of the elastic deformation capability of the rubber asphalt. At present, the evaluation and the test of the elastic deformation capability of the rubber asphalt are not uniform, and an elastic recovery rate test method and a rebound recovery test method can be adopted. The former is a method widely adopted at present for evaluating the elastic recovery characteristics of modified asphalt and rubber asphalt, and is carried out according to the road engineering asphalt and asphalt mixture test regulation JTG E20-2011T 0662-2000 asphalt elastic recovery test. The method comprises the steps of stretching a test piece according to specified experimental conditions until the ductility is 10cm +/-0.25 cm, stopping stretching, immediately shearing the test piece, keeping the test piece in water for 1h, then unloading the test piece from a tester, straightening, moving the test piece to align the tips of two parts of the test piece, measuring the residual length of the test piece, and further calculating the elastic recovery rate, wherein the method has the following problems: 1) during the test, the sample needs to be dismounted from the ductility tester, and the sample can be bent downwards by the dismounting action. After the sample is stretched to be cut off, one end of the sample is bonded with the test die, and the other end of the sample is in a cantilever state, so that when the sample is dismounted from the ductility apparatus, the bottom of the sample is not supported, downwarping deformation can be generated, and the accuracy of measuring the residual length of the sample is influenced; 2) when the residual length of the sample is observed, a matched scale is not arranged, so that the measurement work is very inconvenient; 3) the actions of disassembling, straightening and aligning the tips of the two parts of samples can increase the disturbance to the samples and influence the accuracy of the measurement of the residual length of the samples. Therefore, in order to overcome the defects in the above tests, a modified asphalt elastic recovery testing device which can be recycled, can eliminate possible downwarping deformation of the sample and is convenient for reading the retraction deformation of the sample needs to be designed.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art's shortcoming, provide a rubber asphalt elasticity recovery rate testing arrangement, the device can avoid the sample possible to disturb down and warp, and is convenient for read the sample and return the deflection, and can used repeatedly.
In order to achieve the purpose, the device for testing the elastic recovery rate of the rubber asphalt comprises a movable base plate, wherein the movable base plate is matched with a ductility instrument, the movable base plate comprises a top plate, a first vertical plate and a second vertical plate, the first vertical plate and the second vertical plate are respectively fixed at the bottom of the top plate, scales and central positioning marks are arranged on the top plate, and positioning holes are formed in the positions of four corners of the top plate.
And a stainless steel crochet hook is arranged at each positioning hole.
The cross section of the top plate is of a rectangular structure, wherein the length, the width and the thickness of the top plate are respectively 12.5cm, 20cm and 1 mm.
The aperture of the positioning hole is 5 mm.
The height and the thickness of the first vertical plate are respectively 5cm and 1mm, and the height and the thickness of the second vertical plate are respectively 5cm and 1 mm.
The utility model discloses following beneficial effect has:
Rubber asphalt elasticity recovery rate testing arrangement when concrete operation, realize the tensile of the rubber asphalt sample that awaits measuring through the ductility appearance, then place the movable backing plate in the below of the rubber asphalt sample that awaits measuring, and ensure that central positioning mark is located the sample center, cut the rubber asphalt sample that awaits measuring, the rubber asphalt sample that awaits measuring this moment relies on the movable backing plate to support, and take place to contract and contract, avoid the possible deformation that disturbs of sample down, keep the rubber asphalt sample that awaits measuring to contract in the water bath, be provided with scale and central positioning mark on the roof, thereby can directly read the two most advanced reading X of the rubber asphalt sample that awaits measuring1and X2Wherein X is1And X2The sum is the total retraction deformation L of the rubber asphalt sample to be tested, and the elastic recovery rate of the rubber asphalt sample to be tested is calculated according to the total retraction deformation L, so that the influence of human factors is less, and the test precision is higher. In addition, it should be noted that the bottom of the sample is supported by the top plate, the first vertical plate and the second vertical plate, so that the downwarping deformation of the sample is eliminated, the accuracy of measuring the residual length of the sample is improved, the structure is simple, the operation is convenient, the repeated use is realized, and the test precision can be greatly improved.
Drawings
Fig. 1 is a schematic structural view of the present invention;
Fig. 2 is a state diagram of the present invention in use.
Wherein, 1 is a top plate, 2 is a first vertical plate, and 3 is a second vertical plate.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings:
Referring to fig. 1 and 2, rubber asphalt elasticity recovery rate testing arrangement include movable backing plate, this movable backing plate cooperatees with the ductility appearance, the movable backing plate includes roof 1, first riser 2 and second riser 3, wherein first riser 2 and second riser 3 are fixed in the bottom of roof 1 respectively, are provided with scale and central location mark on roof 1, and the locating hole has been seted up to the position at four angles of roof 1.
Stainless steel crochet hooks are arranged at the positions of the positioning holes; the cross section of the top plate 1 is of a rectangular structure, wherein the length, the width and the thickness of the top plate 1 are respectively 12.5cm, 20cm and 1 mm; the aperture of the positioning hole is 5 mm; the height and the thickness of the first vertical plate 2 are respectively 5cm and 1mm, and the height and the thickness of the second vertical plate 3 are respectively 5cm and 1 mm.
The utility model discloses a concrete operation process does:
placing a rubber asphalt sample to be measured on a ductility instrument, stretching the rubber asphalt sample to be measured at the speed of 5cm/min by the ductility instrument, placing a movable base plate coated with a separant on the surface below the rubber asphalt sample to be measured from one end of a water tank in the ductility instrument, adjusting the position of the movable base plate by a stainless steel hook needle through a positioning hole to ensure that a central positioning mark is aligned with the center of the sample, shearing the rubber asphalt sample to be measured, supporting the rubber asphalt sample to be measured by the movable base plate and retracting, keeping the rubber asphalt sample to be measured to retract in a water bath for 1h, reading the readings X of two tip readings of the rubber asphalt sample to be measured1And X2Wherein X is1And X2The sum is the total retraction deformation L of the rubber asphalt sample to be detected, the retraction deformation L of the rubber asphalt sample to be detected is divided by the ductility value of the rubber asphalt sample to be detected before retraction, and the division result is used as the elastic recovery rate of the rubber asphalt sample to be detected.
Claims (5)
1. The utility model provides a rubber asphalt elasticity recovery rate testing arrangement, its characterized in that cooperatees with the ductility appearance, including the activity backing plate, the activity backing plate includes roof (1), first riser (2) and second riser (3), and wherein first riser (2) and second riser (3) are fixed in the bottom of roof (1) respectively, are provided with scale and central location mark on roof (1), and the locating hole has been seted up to the position at four angles of roof (1).
2. The device for testing the elastic recovery rate of rubber asphalt according to claim 1, wherein a stainless steel crochet hook is arranged at each positioning hole.
3. the device for testing the elastic recovery rate of rubber asphalt according to claim 1, wherein the cross section of the top plate (1) is a rectangular structure, and the length, the width and the thickness of the top plate (1) are 12.5cm, 20cm and 1mm respectively.
4. The apparatus for testing elastic recovery rate of rubberized asphalt according to claim 2, wherein the diameter of the positioning hole is 5 mm.
5. The device for testing the elastic recovery rate of rubber asphalt according to claim 1, wherein the height and thickness of the first vertical plate (2) are 5cm and 1mm respectively, and the height and thickness of the second vertical plate (3) are 5cm and 1mm respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920555719.XU CN209803147U (en) | 2019-04-22 | 2019-04-22 | Rubber asphalt elasticity recovery rate testing arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920555719.XU CN209803147U (en) | 2019-04-22 | 2019-04-22 | Rubber asphalt elasticity recovery rate testing arrangement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209803147U true CN209803147U (en) | 2019-12-17 |
Family
ID=68830677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920555719.XU Expired - Fee Related CN209803147U (en) | 2019-04-22 | 2019-04-22 | Rubber asphalt elasticity recovery rate testing arrangement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209803147U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109946442A (en) * | 2019-04-22 | 2019-06-28 | 陕西交通职业技术学院 | A kind of rubber asphalt elastic restoration ratio test device and method |
| CN114018695A (en) * | 2021-09-23 | 2022-02-08 | 山东高速集团有限公司 | Device and test method for rapidly detecting asphalt deformation and deformation recovery |
-
2019
- 2019-04-22 CN CN201920555719.XU patent/CN209803147U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109946442A (en) * | 2019-04-22 | 2019-06-28 | 陕西交通职业技术学院 | A kind of rubber asphalt elastic restoration ratio test device and method |
| CN114018695A (en) * | 2021-09-23 | 2022-02-08 | 山东高速集团有限公司 | Device and test method for rapidly detecting asphalt deformation and deformation recovery |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191217 Termination date: 20200422 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |