CN201828472U

CN201828472U - Bituminous mixture durability testing device

Info

Publication number: CN201828472U
Application number: CN2010205346094U
Authority: CN
Inventors: 裴建中; 张昕; 张红; 常明丰
Original assignee: Changan University
Current assignee: Changan University
Priority date: 2010-09-17
Filing date: 2010-09-17
Publication date: 2011-05-11
Anticipated expiration: 2020-09-17

Abstract

The utility model relates to a bituminous mixture durability testing device which is characterized in that a joist fatigue tester is arranged in a pressure tank, a temperature controller connected with a first electronic relay is arranged on the inner wall of the pressure tank, and a sealing cover provided with a temperature sensor is arranged at the top of the pressure tank; the sealing cover is provided with a left side through hole and a right side through hole, wherein the left side through hole is internally provided with a packaging drum and the right side through hole is internally provided with a data line interface; the packaging drum is internally provided with an air pressure sensor, a three-way pipe and a control valve; a compressed air outlet is arranged at one end of the three-way pipe, the second end of the three-way pipe is connected with the air pressure sensor, and third end of the three-way pipe is connected with the control valve that is communicated with a compressed air source by a pressure valve arranged on an air guide pipe; the control valve is connected with a second electronic relay; and the first electronic relay, the second electronic relay, the temperature sensor, the air pressure sensor and the joist fatigue tester are respectively connected with a computer by the data line interface and a data line. The bituminous mixture durability testing device realizes the union to the aging and fatigue simulation test of the bituminous mixture, and has less influence by anthropic factors.

Description

The asphalt durability test device

Technical field

The utility model belongs to asphalt highway laboratory simulation technical field of measurement and test, is specifically related to a kind of asphalt durability test device.

Background technology

In recent years, in order to adapt to the needs that China's economy develops rapidly, the expressway construction career development is swift and violent.Because driving is comfortable, construct and keep in repair advantages such as easy, newly-built express highway pavement adopts bituminous pavement more.But in long-term use, bituminous pavement is worn out, the influence of fatigue, and often too early appearance destroys, and can not satisfy request for utilization.After the nineties in 20th century, U.S. SHRP achievement SUPPERPAVE proposed pressure aging test (Pressure Aging Vessel is called for short PAY), the pressure aging test had become the standard test method of ageing of asphalt test.PAV test is that aging temperature is looked pitch label difference and is defined as 90 ℃～110 ℃ with pitch sample aging 20h in charge pressure is the head tank of 2.1Mpa, and the PAV test is equivalent to the situation in 5 years of operating period road crust ageing of asphalt to the influence of ageing of asphalt.

In the pitch testing fatigue, the method that application phenomenology method is carried out the pitch torture test is a lot, but be limited to factors such as test period and expense, what be mostly employing at present is the small-sized fatigue test method of cycle indoor and outdoor short, that expense is few, comprise test methods such as pulse pressure head type, tire pressurization formula, driving wheel wheelmark formula and moving web wheel mark formula, the simple bending test mainly contains following three kinds of forms: 1. mid point loads or the loading of three branches; 2. hinged cantilever beam; 3. trapezoidal semi-girder.

No matter be PAV test or small-sized torture test at present, it all is simulation to single service condition, can not the actual operating position of concentrated expression bituminous pavement, therefore need provide a kind of will carry out the device of comprehensive simulation test to the fatigue effect of the long-term ageing of pitch and compound in the bituminous pavement use.

Summary of the invention

Technical problem to be solved in the utility model is to overcome the deficiency of above-mentioned test unit, and a kind of pitch fatigue and aging conditions of testing simultaneously is provided, to obtain the asphalt durability test device of road pavement behaviour in service comprehensive simulation effect in the laboratory.

Solving the problems of the technologies described above the technical scheme that is adopted is: be provided with the girder fatigue tester in the inside of head tank, the inwall on right side is provided with the temperature controller that first electronic relay interior with being installed in head tank is connected, the top is provided with the gland bonnet that temperature sensor is installed, establish in gland bonnet is provided with encapsulation tube PATENT left side via and in establish the right side through hole of data line interface, in the encapsulation tube, be provided with baroceptor, three-way pipe and operation valve, one end of three-way pipe for head tank in the compressed air outlet that links, one end connects baroceptor, one end connects operation valve, operation valve by being provided with pressure valve wireway and the compressed air source of head tank outside link, operation valve links to each other with second electronic relay by lead, first electronic relay, second electronic relay, temperature sensor, baroceptor, the girder fatigue tester links to each other with computing machine respectively with data line by data line interface.

Second electronic relay, baroceptor are connected with computing machine by data line, and data line interface is connected and is connected with computing machine by data line with girder fatigue tester, temperature sensor and first electronic relay respectively by data line.

The utility model is fixed on sealing with the girder fatigue tester and can bears anticyclonic head tank bottom, temperature controller links to each other with computing machine by first electronic relay, temperature sensor in the head tank feeds back to computing machine with the real time temperature in the head tank, computing machine is by first electronic relay control temperature controller, realize the accurate control and the simulation of test temperature, pressurized air is sent in the head tank after pressure valve is regulated from wireway, baroceptor feeds back to computing machine with the real-time air pressure in the head tank, computing machine is realized the accurate control and the simulation of test air pressure by second electronic relay that is connected with operation valve, test temperature and the air pressure of girder fatigue tester in the utility model in head tank reaches standard and loads repeatedly when stablizing, realization is to the long-term ageing of asphalt and the unification of tired simulation test, and process of the test automaticity height, it is less influenced by human factor.

Description of drawings

Fig. 1 is the structural representation of an embodiment of the utility model.

Fig. 2 is the upward view of gland bonnet 9 among Fig. 1.

Embodiment

Below in conjunction with accompanying drawing and each embodiment the utility model is further described, but the utility model is not limited to these embodiment.

In Fig. 1, the asphalt durability test device of present embodiment is made of girder fatigue tester 1, hold-down support 2, head tank roller 3, head tank 4, first electronic relay 5, computing machine 6, temperature controller 7, data line interface 8, gland bonnet 9, temperature sensor 10, encapsulation tube 11, baroceptor 12, three-way pipe 13, second electronic relay 14, operation valve 15, pressure valve 16 connections.

As shown in Figure 1, head tank 4 bottoms in tubular are equipped with head tank roller 3 with the screw threads for fastening connector, bottom in the head tank 4 is installed with hold-down support 2, with the screw threads for fastening connector girder fatigue tester 1 is installed on the hold-down support 2, girder fatigue tester 1 of the present utility model is the market sale product, be installed with temperature controller 7 with the screw threads for fastening connector on the inwall on head tank 4 right sides, temperature controller 7 is connected with first electronic relay 5 in being installed in head tank 4 by data line, the sidewall of the top of head tank 4 and head tank 4 is connected as a single entity and constitutes and protrude to central horizontal along head tank 4 outers, outer at head tank 4 tops is processed with threaded hole, the inboard processing of threaded hole is shaped on annular groove, head tank 4 tops are equipped with gland bonnet 9 with Bolt Connection, bottom center position at gland bonnet 9 is installed with temperature sensor 10 with the screw threads for fastening connector, the upper surface center is connected with the gland bonnet handle, simultaneously with reference to Fig. 2, be processed with 6 uniform bolts hole of circumference in equal parts on the gland bonnet 9, the position of bolt hole and quantity are corresponding with the threaded hole position and the quantity at head tank 4 tops, the inboard one of gland bonnet 9 bottom surface upper bolt holes is shaped on the annular protrusion concentric with gland bonnet 9, be pasted with rubber washer on the annular protrusion, annular protrusion adapts with the annular groove at head tank 4 tops and cooperates, and with bolt gland bonnet 9 is tightened the back rubber washer and can reach obturation effect.Gland bonnet 9 top cover labyrinth handle both sides are processed with 2 through holes on same straight line, be pasted with encapsulation tube 11 in the PATENT left side via, data line interface 8 is installed in the through hole of right side, in the encapsulation tube 11 baroceptor 12 is installed, three-way pipe 13 and operation valve 15, one end of three-way pipe 13 for head tank 4 in the compressed air outlet that links, the other end links by thread connection and baroceptor 12, also have an end to link by thread connection and operation valve 15, the other end of operation valve 15 links by the compressed air source that is installed in pressure valve 16 and head tank 4 outsides on the wireway, pressurized air is regulated pressure through pressure valve 16 earlier before entering head tank 4, gases at high pressure in the pneumatic accumulator are carried out step-down handle, with guarantee pressurized air through out-of-date can be to operation valve 15, baroceptor 12 causes damage.Operation valve 15 links to each other with second electronic relay 14 by lead, and second electronic relay 14, baroceptor 12 are connected by the computing machine 6 of data line with head tank 4 outsides; Computing machine 6 is connected with girder fatigue tester 1, temperature sensor 10 and first electronic relay 5 in the head tank 4 respectively by data line interface 8 and data line.

Testing experiment principle of the present utility model is as follows:

Temperature sensor 10 is transferred to computing machine 6 with 4 real time temperature value in the head tank of sensing, computing machine 6 sends instruction control first electronic relay 5, and then control the opening of temperature controller 7, close, realize that the automatic in real time of temperature controlled and regulate in the head tank 4, computing machine 6 links to each other with operation valve 15 by second electronic relay 14, computing machine 6 instruction control second electronic relay 14, and then control the opening of operation valve 15, close and realize regulating automatically in real time of head tank 4 internal gas pressures, pressurized air by operation valve 15 enters in the head tank 4 through an end of three-way pipe 13, the baroceptor 12 that links with three-way pipe 13 is transferred to computing machine 6 with the real-time atmospheric pressure value in the head tank of sensing 4, after 6 pairs of data of computing machine are analyzed instruction is sent to second electronic relay 14 and carry out the automatic control and the adjusting of air pressure, girder fatigue tester 1 is with the stress that obtains in the experimentation, strain data is sent to computing machine 6 by data line.

Compared with the prior art the utility model has following technological merit:

(1) can unite in time with tired simulated test to the long-term ageing of asphalt, realize the overall merit to durability of asphalt mixture;

(2) process of the test automaticity height, all by computer control, record, whole experimentation is affected by human factors littler after on-test;

(3) pressurized tank 4 and girder fatigue tester 1 all can use separately as required.

Claims

1. asphalt durability test device, it is characterized in that: be provided with girder fatigue tester (1) in the inside of head tank (4), the inwall on right side is provided with the temperature controller (7) that first electronic relay (5) interior with being installed in head tank (4) is connected, the top is provided with the gland bonnet (9) that temperature sensor (10) are installed, establish in gland bonnet (9) is provided with encapsulation tube (11) PATENT left side via and in establish the right side through hole of data line interface (8), in encapsulation tube (11), be provided with baroceptor (12), three-way pipe (13) and operation valve (15), one end of three-way pipe (13) for head tank (4) in the compressed air outlet that links, one end connects baroceptor (12), one end connects operation valve (15), wireway and head tank (4) the outside compressed air source of operation valve (15) by being provided with pressure valve (16) links, operation valve (15) links to each other with second electronic relay (14) by lead, first electronic relay (5), second electronic relay (14), temperature sensor (10), baroceptor (12), girder fatigue tester (1) links to each other with computing machine (6) respectively with data line by data line interface (8).