CN202886251U

CN202886251U - Device for evaluating influence of surface texture to stickiness of asphalt and aggregate

Info

Publication number: CN202886251U
Application number: CN 201220530108
Authority: CN
Inventors: 裴建中; 杨彤; 孔维川; 刘玉; 张久鹏
Original assignee: Changan University
Current assignee: Changan University
Priority date: 2012-10-16
Filing date: 2012-10-16
Publication date: 2013-04-17
Anticipated expiration: 2022-10-16

Abstract

The utility model relates to a device for evaluating influence of surface texture to stickiness of asphalt and aggregate. An aggregate asphalt interlay test piece in a sandwich structure is adhered by using a lower base disc and an upper base disc, a rotating rod is rotated so as to enable a lower aggregate sample of the aggregate asphalt interlay test piece to generate force with the direction opposite to the rotating direction of an upper aggregate sample, the lower aggregate sample is cracked at an asphalt film section, a torque sensor detects the value of a torque acting on the test piece in the torsion process in real time, and torques corresponding to the test piece are detected, so that the shearing damage of an asphalt mixing material can be truly simulated, the stickiness between the asphalt and the aggregate is reflected, the influence of the surface roughness of the aggregate to the stickiness of the asphalt and the aggregate is researched, the reliable basis for the research on the stickiness of the asphalt and the aggregate is provided, and moreover, the device provided by the utility model is simple in structure and convenient to operate.

Description

Be used for estimating superficial makings to pitch and the sex device of adhesion that gathers materials

Technical field

The technical field that the utility model belongs to pitch and the adhesiveness of gathering materials is estimated, the superficial makings that is specifically related to gather materials for research is to pitch and the sex device of adhesion that gathers materials.

Background technology

Pitch is widely used in road engineering and the construction waterproofing engineering as a kind of very important earth working material.In China, built express highway pavement is bituminous pavement more than 90%, and pitch and the adhesiveness of gathering materials directly affect service property (quality) and the permanance of bituminous pavement, so adhesiveness is to estimate an important indicator of pitch technical feature.Water resisting property after pitch wraps and gathers materials (i.e. anti-stripping) the not only character with pitch has substantial connection, and also relevant with the superficial makings that gathers materials.So, improve the performance of bituminous pavement and must understand the surface of aggregate texture to pitch and the adhering impact of gathering materials.Therefore, be necessary to propose a kind of method and estimate the surface of aggregate roughness to pitch and the adhering impact of gathering materials.

Research evaluation pitch has water-boiling method, gravimetric method, photoelectric colorimetry, NAT method, static water seaoning, capillary column method etc. with the adhering method of gathering materials at present, is on the method for pitch with the adhering impact of gathering materials for the surface of aggregate texture but do not have a kind of.Therefore need now a kind of simple, effective, economic method to study the surface of aggregate roughness to pitch and the adhering impact of gathering materials.

The utility model content

A purpose of the present utility model is to overcome pitch of the prior art and estimates existing deficiency with the adhesiveness of gathering materials, and provides a kind of simple in structure, judges that by detecting moment of torsion different texture is to pitch and the sex device of adhesion that gathers materials.

The technical scheme that solves the problems of the technologies described above is: being used for estimating superficial makings is to be provided with support and lower fixed bar at base to pitch with the sex device of adhesion that gathers materials, the low bottom-disc parallel with base is arranged on the upper end of fixed bar, above low bottom-disc, be provided with the top bottom-disc symmetrical with low bottom-disc, top bottom-disc connects with the power output shaft of rack-mount motor by bull stick, at bull stick speed probe and torque sensor are installed, speed probe links to each other with A/D converter by wire respectively with torque sensor, A/D converter connects the input port of computing machine by wire, the output port of computing machine links to each other with control module by wire, and control module links to each other with motor by wire.

It is by low bottom-disc and top bottom-disc that the pitch interlayer test specimen that gathers materials of " sandwich " structure is bonding to pitch with the sex device of adhesion that gathers materials that the utility model is estimated superficial makings, rotate bull stick make the lower sample that gathers materials of the pitch interlayer test specimen that gathers materials produce with on the gather materials rightabout power of rotation of sample, with under gather materials sample at asphalt membrane section fracture, torque sensor detects the torque value that acts on the test specimen in real time in twist process, detect the corresponding moment of torsion of test specimen, shear failure that can the real simulation asphalt, reflect pitch and gather materials between adhesion property, can study the surface of aggregate roughness to pitch and the adhering impact of gathering materials, and provide reliable foundation for pitch and the adhering research of gathering materials, and apparatus structure of the present utility model is simple, and is easy to operate.

Description of drawings

Fig. 1 is apparatus structure schematic diagram of the present utility model.

Fig. 2 is the pitch interlayer test specimen structural representation that gathers materials among Fig. 1.

Fig. 3 is the surface of aggregate texture schematic diagram of Fig. 2.

Embodiment

Now in conjunction with the accompanying drawings and embodiments the utility model is further specified, but the utility model is not limited only to following embodiment.

Referring to Fig. 1, the pitch of the present embodiment is connected by base 1, support 2, lower fixed bar 3, low bottom-disc 4, gather materials pitch interlayer test specimen 5, top bottom-disc 6, bull stick 7, speed probe 8, motor 9, torque sensor 10, control module 11, computing machine 12 and A/D converter 13 with the adhesiveness pick-up unit that gathers materials and consists of.

On base 1, be installed with lower fixed bar 3 and support 2 by threaded fastener, the upper end of lower fixed bar 3 is equipped with low bottom-disc 4 by thread connection, with the screw threads for fastening connector motor 9 is installed on the support 2, with the connector connection bull stick 7 is installed on the output shaft of motor 9, the lower end of bull stick 7 is equipped with top bottom-disc 6 by thread connection, the geometric configuration of the geometric configuration of top bottom-disc 6 and low bottom-disc 4 is identical, and the pitch interlayer test specimen 5 that will gather materials during detection is clamped between top bottom-disc 6 and the low bottom-disc 4.

The pitch interlayer test specimen 5 that gathers materials gather materials on being sample 5-1 and under the sample 5-3 that gathers materials be bonded together by asphalt membrane 5-2, be " sandwich " structure.

At bull stick 7 speed probe 8 and torque sensor 10 are installed, speed probe 8 links to each other with A/D converter 13 by wire respectively with torque sensor 10, A/D converter 13 links to each other by the input port of wire with computing machine 12, the output terminal of computing machine 12 connects control module 11 by wire, and the output terminal of control module 11 is by wire power connection motivation 9.Speed probe 8 and torque sensor 10 convert top bottom-disc 6 tach signals and the torque signal that gathers to electric signal transmission to A/D converter 13, and A/D converter 13 is converted to digital signal with the pulse electrical signal of inputting and is transported to computing machine 12 by wire.

Computing machine 12 calculates according to predefined program, shows result of calculation, also passes through control module 11 by display, and control motor 9 rotates.

During use, utilize epoxy resin with on it pitch interlayer test specimen 5 that gathers materials of making, lower both ends of the surface are bonded in respectively the card of top bottom-disc 6 and low bottom-disc 4, be fixed between low bottom-disc 4 and the top bottom-disc 6, actuating motor 9, the control rotating speed is 0.5 rev/min, detect in real time rotating speed by speed probe 8, and convert tach signal to digital data transmission to computing machine 12 through A/D converter 13, by computing machine 12 setting value and actual detected value are calculated, if equal then keep constant, if deviation is arranged, then send a command to control module 11, adjust rotating speed to setting value by control module 11 control motor 9 and equate with detected value.Motor 9 rotates and by bull stick 7 twisting resistance is passed to top bottom-disc 6, top bottom-disc 6 drive the pitch interlayer test specimen 5 that gathers materials on the sample 5-1 that gathers materials rotate, and the lower sample 5-3 that gathers materials of the pitch interlayer test specimen 5 that gathers materials is fixed on the upper surface of low bottom-disc 4, produce with on the gather materials rightabout power of rotation of sample 5-1, with under gather materials sample 5-3 at asphalt membrane 5-2 section fracture, torque sensor 10 detects the torque value that acts on the test specimen in real time in twist process, and process A/D converter 13 is sent to computing machine 12, calculated according to pre-set program by computing machine 12, draw the corresponding sticking coefficient μ of superficial makings of different closenesses _n, relatively draw wherein maximum sticking coefficient μ _Max, and show by display.Maximum sticking coefficient μ _MaxShow the pitch interlayer test specimen 5 that gathers materials gather materials and pitch between cohesiveness larger, namely gather materials during this texture closeness the strongest with the adhesiveness of pitch.

The utility model carries out twisting test to the test sample of the pitch interlayer test specimen 5 that gathers materials that the identical different superficial makings that gathers materials is produced, and measures the difference of its moment of torsion, can study the surface of aggregate roughness to pitch and the adhering impact of gathering materials.

Claims

1. one kind is used for estimating superficial makings to pitch and the sex device of adhesion that gathers materials, it is characterized in that: be provided with support (2) and lower fixed bar (3) at base (1), the low bottom-disc (4) parallel with base (1) is arranged on the upper end of fixed bar (3), be provided with the top bottom-disc (6) symmetrical with low bottom-disc (4) in the top of low bottom-disc (4), top bottom-disc (6) connects with the power output shaft of motor (9) on being installed in support (2) by bull stick (7), at bull stick (7) speed probe (8) and torque sensor (10) are installed, speed probe (8) links to each other with A/D converter (13) by wire respectively with torque sensor (10), A/D converter (13) connects the input port of computing machine (12) by wire, the output port of computing machine (12) links to each other with control module (11) by wire, and control module (11) links to each other with motor by wire.