CN202256111U - Asphalt mixture porosity testing device - Google Patents
Asphalt mixture porosity testing device Download PDFInfo
- Publication number
- CN202256111U CN202256111U CN2011203500824U CN201120350082U CN202256111U CN 202256111 U CN202256111 U CN 202256111U CN 2011203500824 U CN2011203500824 U CN 2011203500824U CN 201120350082 U CN201120350082 U CN 201120350082U CN 202256111 U CN202256111 U CN 202256111U
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- water
- sealed container
- airtight container
- control valve
- porosity
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Abstract
The utility model relates to an asphalt mixture porosity testing device, which can test porosity volume of openings and half openings of asphalt mixture and mainly comprises a sealed container, a pressurizing device of the sealed container, a hydraulic cylinder, a water pump and a flow control valve, wherein a pressurizing piston is arranged in the sealed container, a piston rod of the hydraulic cylinder is connected with the pressurizing piston in the sealed container, and the flow control valve is connected between a water inlet of the sealed container and the water pump. The hydraulic cylinder is utilized to push the sealed container, and intensity of pressure in the sealed container can be increased. The flow control valve is utilized to adjust water inflowing rate and read passed water volume. A test piece sealed by a thin film and an unsealed test piece are respectively placed in the container, pressurization is conducted and water is filled, the difference of water inflowing volumes for two times is water volume entering pores of the test pieces, and accordingly the porosity of the test pieces can be calculated.
Description
Technical field
The utility model belongs to solid porosity field tests, particularly relates to a kind of asphalt porosity proving installation.
Background technology
The porosity of asphalt is the important evaluation index of pavement structure usability, and especially for the drainage asphalt pavement structure, the size of porosity has directly determined the draining and the noise reduction on road surface.In highway engineering pitch and the asphalt testing regulations (JTJ 052-2000); The test method of utilizing the asphalt water absorbing properties to carry out the index of correlation test comprises the surface drying method and seals with wax method; Be under atmospheric pressure environment; Aerial weight of weighing test specimen and the weight in water utilize both differences to calculate pore size and volumetric parameter respectively.
Hole in the asphalt structure comprises open pores; Remain silent three kinds in hole and half opening hole; Open pores has been meant that two or more openings are in communication with the outside; The half opening hole is meant only has an opening to be in communication with the outside, and the hole of remaining silent is meant that complete closed does not have opening to be connected with the external world.For open pores, water also very easily gets under atmospheric pressure state; For the hole of remaining silent, no matter take which kind of mode, water all is difficult to get into; And for the half opening hole, the hole air can't be discharged immediately under the normal pressure.Therefore; Think the half opening hole by mistake to be the hole of remaining silent easily when measuring the porosity in the asphalt structure with existing method; The result who measures can not truly reflect the porosity in the asphalt structure, and opening and half opening hole all have significant effects to performances such as the water permeability of asphalt structure, intensity, bitumen blowing property.
Summary of the invention
The utility model problem to be solved is: a kind of asphalt porosity proving installation is provided, utilizes this device can measure the opening of asphalt and the volume of half opening hole.
The technical scheme that addresses the above problem is: the asphalt porosity proving installation that the utility model provides comprises: the airtight container of altitude scale, the tensimeter that is connected with airtight container are arranged, give pressue device, hydraulic cylinder, water pump and the flowrate control valve of airtight container supercharging; Wherein the top in the airtight container is provided with charged piston; The piston rod of hydraulic cylinder is connected with the interior charged piston of airtight container; The water inlet of sealing container bottom is connected with the outlet of flowrate control valve, and the import of flowrate control valve is connected with water pump.Utilize hydraulic cylinder to promote airtight container, realize increasing the pressure in the airtight container; Utilize the size of flowrate control valve adjustment water inlet speed, and read through the water yield; Utilize airtight container inner height scale to read liquid level in the container.
Compared with prior art, the measuring accuracy of the utility model is higher, has reduced manual operation caused by factors test error.The utility model adopts increases internal tank air pressure earlier; From the slow water filling of container bottom, prolong the off-period of water pairs of openings hole again, made intrapore air have the enough time to overflow; Also oppress simultaneously water and get in the hole of test specimen, particularly get in the half opening hole.Because water under high pressure improves the solubleness of air, can eliminate the existence than minute bubbles, helps improving the filling rate to hole.Another advantage of the utility model is: through the immersion height of control test specimen; Can measure the difference between the test specimen different parts porosity; For example the test specimen submergence in the container highly is 1/2 o'clock, and poor according to twice inflow in front and back can record the porosity of test specimen the latter half.In addition, the utility model also can be used to simulate the full regimen condition of structure under the different hydrostatic forces.
Description of drawings
Fig. 1 is the structure diagram of the utility model asphalt porosity proving installation.
Embodiment
As shown in Figure 1: the utility model is measured the device of asphalt porosity and mainly is made up of electric hydaulic cylinder 1, airtight container 2, flowrate control valve 3, tensimeter 4 and water pump 5.Electric hydaulic cylinder 1 is positioned at the airtight container top, and through electric-control system 12 control pressurization, constant voltage and uninstall process, its piston rod 11 is connected with the interior piston 21 of airtight container.The sidewall of airtight container is connected with tensimeter 4, and is provided with graduated scale 22, and the water inlet of sealing container bottom is connected with water inlet pipe 7 through snap ring 6, and water inlet pipe 7 is connected a flowrate control valve 3 with 5 on water pump.
Airtight container 2 is made up of the first half 23 and Lower Half 24 two parts, and the first half 23 spins with Lower Half 24 employing screw threads and is one.
Below in conjunction with measurement mechanism shown in Figure 1 the asphalt measurement method of porosity is specified.
1) utilize the height of vernier caliper measurement test specimen, with the test specimen 8 usefulness tensile properties complete sealed envelope of PVC preservative film preferably, put into the Lower Half of airtight container 2, the first half and the Lower Half with airtight container is screwed in together again;
2) utilizing pressue device to increase atmospheric pressure in the airtight container (referring to step 3), makes the air pressure in the airtight container reach 2.5 standard atmospheric pressures;
3) open water pump 5; Water is slowly got in the airtight container 2; Utilize the scale mark of airtight container to observe water surface elevation; Control water surface rising speed is 1.5cm/min, when water logging has whole test specimen and liquid level to arrive setting height, does not close flowrate control valve 3, and reads the water yield L that gets into sealed container interior through flowrate control valve 3
1
4) drain the interior water of airtight container; Take out test specimen and remove film, put it into once more in the airtight container and and seal, electric-control system 12 pressurizations airtight container; The piston 21 that the piston rod 11 of hydraulic cylinder promotes in the airtight container is descending; Improve the pressure in the airtight container 2 through the pressurized air volume, after tensimeter 4 is shown to 2.5 standard atmospheric pressures, stop pressurization, and keep pressure constant state;
5) open water pump, once more water is slowly injected in the airtight container with the water inlet speed of step 3), close flowrate control valve when liquid level reaches with the step 3) equal height, and read the water yield L that gets in the airtight container through flowrate control valve
2
6) the difference L of twice inflow
2-L
1, be the water yield that gets into the test specimen internal void, in view of the above can be in the hope of the porosity of test specimen.
Claims (2)
1. asphalt porosity proving installation; It is characterized in that comprising: the airtight container of altitude scale, the tensimeter that is connected with airtight container are arranged, give pressue device, hydraulic cylinder, water pump and the flowrate control valve of airtight container supercharging; Wherein the top in the airtight container is provided with charged piston; The piston rod of hydraulic cylinder is connected with the interior charged piston of airtight container, and the water inlet of sealing container bottom is connected with the outlet of flowrate control valve, and the import of flowrate control valve is connected with water pump.
2. proving installation according to claim 2 is characterized in that airtight container is made up of the first half and Lower Half two parts, and the first half and Lower Half adopt screw thread to spin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203500824U CN202256111U (en) | 2011-09-19 | 2011-09-19 | Asphalt mixture porosity testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203500824U CN202256111U (en) | 2011-09-19 | 2011-09-19 | Asphalt mixture porosity testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202256111U true CN202256111U (en) | 2012-05-30 |
Family
ID=46117335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203500824U Expired - Lifetime CN202256111U (en) | 2011-09-19 | 2011-09-19 | Asphalt mixture porosity testing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202256111U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359930A (en) * | 2011-09-19 | 2012-02-22 | 西安公路养护技术工程研究中心有限公司 | Test method for porosity of asphalt mixture, and apparatus thereof |
| CN105866010A (en) * | 2016-05-31 | 2016-08-17 | 三峡大学 | Field interval rate testing device and method of asphalt pavement |
| CN105910972A (en) * | 2016-05-06 | 2016-08-31 | 新疆大学 | Method for measuring porosity distribution of random stacking bed layer |
| CN105954173A (en) * | 2016-06-08 | 2016-09-21 | 山西省交通科学研究院 | Macroporous asphalt mixture pore change law experimental testing device |
| CN110118431A (en) * | 2019-05-20 | 2019-08-13 | 青岛海尔空调器有限总公司 | A kind of cleaning structure, air conditioner indoor unit and air conditioner |
| CN111678852A (en) * | 2020-05-11 | 2020-09-18 | 首钢集团有限公司 | Refractory material air hole connectivity experiment mold and method |
-
2011
- 2011-09-19 CN CN2011203500824U patent/CN202256111U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359930A (en) * | 2011-09-19 | 2012-02-22 | 西安公路养护技术工程研究中心有限公司 | Test method for porosity of asphalt mixture, and apparatus thereof |
| CN105910972A (en) * | 2016-05-06 | 2016-08-31 | 新疆大学 | Method for measuring porosity distribution of random stacking bed layer |
| CN105910972B (en) * | 2016-05-06 | 2019-01-04 | 新疆大学 | The method for measuring the distribution of randomly packed bed layer porosity |
| CN105866010A (en) * | 2016-05-31 | 2016-08-17 | 三峡大学 | Field interval rate testing device and method of asphalt pavement |
| CN105954173A (en) * | 2016-06-08 | 2016-09-21 | 山西省交通科学研究院 | Macroporous asphalt mixture pore change law experimental testing device |
| CN110118431A (en) * | 2019-05-20 | 2019-08-13 | 青岛海尔空调器有限总公司 | A kind of cleaning structure, air conditioner indoor unit and air conditioner |
| CN111678852A (en) * | 2020-05-11 | 2020-09-18 | 首钢集团有限公司 | Refractory material air hole connectivity experiment mold and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120530 |