CN106353252A - Device and method for evaluating overall bondability of asphalt patch material - Google Patents

Abstract

The invention relates to a device for evaluating the overall bondability of an asphalt patch material. The device sequentially comprises a press machine, a pressure head, a test piece limiting groove and a bearing table, wherein an asphalt mixture test piece is loaded on the upper part of a concrete bottom plate; the lower end of the test piece limiting groove is in a cylinder shape, and the axis direction of the cylinder is the same as the direction of a connecting shaft; the bearing table is used for bearing the test piece limiting groove; the upper end of the bearing table is matched with the lower end of the test piece limiting groove. The device for evaluating the overall bondability of the asphalt patch material and a method for evaluating the overall bondability of the asphalt patch material fill the blank of an instrument for evaluating the overall bondability of the asphalt patch material; by simulating the actual road conditions and the stress condition of the asphalt patch material, the device and the method can evaluate the overall bondability of the asphalt patch material by means of data analysis; furthermore, the overall bondability of the asphalt patch material is a very important performance index of the asphalt patch material, and has great guidance and reference significance for the design, construction and detection of the asphalt patch material.

Description

A kind of Colophonium feed supplement entirety caking property evaluating apparatus and evaluation methodology

Technical field

The present invention relates to Colophonium caking property technical field of measurement and test, particularly to a kind of Colophonium feed supplement entirety caking property evaluation dress Put and evaluation methodology.

Background technology

At present, for the factor of impact Colophonium feed supplement entirety caking property, under conditions of the normal use of road, Colophonium is mended Material is overall to be both stressed, and was subject to shearing force again.So the influence factor of impact Colophonium feed supplement entirety caking property then has: one is Colophonium basis The viscosity of body, two is the contact surface degree of roughness being determined by mineral aggregate gradation, the two combined influence Colophonium feed supplement entirety caking property.

Existing evaluation methodology be only capable of only the caking property of Colophonium being evaluated it is impossible to evaluated Colophonium feed supplement with original road Adhesion strength on the interface in face.

Content of the invention

The invention solves the problems that technical problem of the prior art, provide a kind of Colophonium feed supplement entirety caking property evaluating apparatus, And then a kind of evaluation methodology is proposed.

In order to solve above-mentioned technical problem, technical scheme is specific as follows:

A kind of Colophonium feed supplement entirety caking property evaluating apparatus, from top to bottom include successively:

Forcing press, it can provide pressure to bitumen mixture specimen；

Pressure head, it is connected with forcing press by connecting shaft, can swing around connecting shaft；

Test specimen stopper slot, its upper end is provided with a depression, is provided with concrete floor in depression；Above described concrete floor Carry bitumen mixture specimen；The lower end of described test specimen stopper slot is cylinder, the axis direction of this cylinder and connecting shaft phase With；

Pressure-bearing platform, it is used for accepting test specimen stopper slot；Matched with the lower end of test specimen stopper slot in pressure-bearing platform upper end.

In technique scheme, the lower end of described pressure head is provided with rubber squeeze head.

In technique scheme, concrete floor is c50 concrete floor, rough surface thereon.

In technique scheme, described forcing press is provided with pressure transducer, and it with real time record pressure value, and can lead to Cross computer drawing pressure versus time image.

A kind of Colophonium feed supplement entirety caking property evaluation methodology, comprises the following steps:

Step i: will put in test specimen stopper slot with the concrete floor that bitumen mixture specimen connects, adjustment pressure head with The angle of test specimen stopper slot is so as to consistent；

Step ii: start forcing press, bitumen mixture specimen is loaded；The pressure sensing that pressure transducer is provided with Device real time record pressure value, and pass through computer drawing pressure versus time image；

Step iii: when obvious snap point in the pressure versus time image of computer real-time depiction, you can judge Colophonium Compound test specimen destroy or bitumen mixture specimen and concrete floor between lose effective bonding, record fracture place's pressure f with Pressure head inclined angle alpha, and contact area a of known asphalt and concrete floor；

Step iv: calculate direct stress σ and shearing stress τ suffered by bitumen mixture specimen according to below equation,

$\mathrm{\σ}=\frac{f}{a}{\cos }^2\mathrm{\α}$

$\mathrm{\τ}=\frac{f}{2a}sin2\mathrm{\α}$

Wherein: σ represents direct stress, τ represents shearing stress, and f represents forcing press instantaneous pressure, and a represents bitumen mixture specimen With the contact area of concrete floor, α represents pressure head inclination angle.

The present invention has a following beneficial effect:

The Colophonium feed supplement entirety caking property evaluating apparatus of the present invention and evaluation methodology have been filled up and Colophonium feed supplement have integrally been bondd Property evaluation appts blank, in the case of simulating actual road use, the stressing conditions of Colophonium feed supplement, can be commented by data analysiss Survey the overall caking property of Colophonium feed supplement, and the overall caking property of Colophonium feed supplement is the extremely important performance indications of Colophonium feed supplement, right The design of Colophonium feed supplement, construction, detection all have great guidance and reference.

Brief description

With reference to the accompanying drawings and detailed description the present invention is described in further detail.

Fig. 1 is the structural representation of the Colophonium feed supplement entirety caking property evaluating apparatus of the present invention.

Fig. 2 is the side structure schematic view of the Colophonium feed supplement entirety caking property evaluating apparatus shown in Fig. 1.

The reference of in figure is expressed as:

1- pressure-bearing platform；2- test specimen stopper slot；3- pressure head；4- rubber squeeze head；5- connecting shaft；6- forcing press；7- Colophonium mixes Material test specimen；8- concrete floor；9- connector.

Specific embodiment

The invention thought of the present invention is: the present invention passes through simulating actual conditions, and that is, road surface exists in the Colophonium feed supplement filling up place Suffered pressure under vehicle traveling and shearing force, evaluate the overall caking property of Colophonium feed supplement by data analysiss.

Below in conjunction with the accompanying drawings the present invention is described in detail.

Colophonium feed supplement entirety caking property evaluating apparatus: as illustrated in fig. 1 and 2, from top to bottom include successively: forcing press 6, angle Variable pressure head 3, test specimen stopper slot 2, pressure-bearing platform 1.The lower end of pressure head 3 is provided with rubber squeeze head 4.It is provided with mixed in test specimen stopper slot 2 Solidifying soil base plate 8 (c50 concrete floor, rough surface), for installing bitumen mixture specimen 7.Pressure head 3 is connected with connector 9, Connector 9 is connected with forcing press 6 by connecting shaft 5.Pressure head 3 can swing along connecting shaft 5.

When using, pressure is passed the Colophonium feed supplement entirety caking property evaluating apparatus of the present invention by forcing press 6 by connector 9 To the pressure transducer real time record pressure value on pressure head 3, and forcing press 6, and pass through computer drawing out-of-phase diagram Picture.Pressure head 3 applies pressure to bitumen mixture specimen 7 by the rubber squeeze head 4 of lower end, and pressure head 3 and test specimen stopper slot 2 Angle all can change, to provide direct stress and shearing stress.

Bitumen mixture specimen 7 is then layered on shaggy concrete floor 8, and is compacted shape.To mix with Colophonium Close and expect that the concrete floor 8 that test specimen 7 connects is put in test specimen stopper slot 2, adjust the angle of pressure head 3 and test specimen stopper slot 2, Start forcing press 6, bitumen mixture specimen 7 is loaded.

When obvious snap point in the pressure versus time image of computer real-time depiction, you can judge asphalt examination Effective bonding is lost, record fractures and locates pressure f and pressure head inclined angle alpha between part destruction or asphalt entirety and concrete, And contact area a of known asphalt and concrete floor, you can calculate direct stress σ suffered by asphalt and cut Stress τ.

$\mathrm{\σ}=\frac{f}{a}{\cos }^2\mathrm{\α}$

$\mathrm{\τ}=\frac{f}{2a}sin2\mathrm{\α}$

Wherein: σ represents direct stress, τ represents shearing stress, and f represents forcing press instantaneous pressure, and a represents bitumen mixture specimen With the contact area of concrete floor, α represents pressure head inclination angle.

By arranging contrast test, with existing general Colophonium feed supplement as blank, to evaluate test specimen asphalt (needs Colophonium feed supplement to be evaluated) the overall caking property of Colophonium feed supplement.

And low temperature, high temperature and immersion bar can be evaluated by test specimen is carried out respectively with freezing, high-temperature heating and immersion Colophonium feed supplement binder entirety caking property under part, and water stability.

Obviously, above-described embodiment is only intended to clearly illustrate example, and the not restriction to embodiment.Right For those of ordinary skill in the art, can also make on the basis of the above description other multi-forms change or Change.There is no need to be exhaustive to all of embodiment.And the obvious change thus extended out or Change among still in the protection domain of the invention.

Claims (5)

1. a kind of Colophonium feed supplement entirety caking property evaluating apparatus are it is characterised in that from top to bottom include successively:

Forcing press (6), it can provide pressure to bitumen mixture specimen (7)；

Pressure head (3), it is connected with forcing press (6) by connecting shaft (5), can swing around connecting shaft (5)；

Test specimen stopper slot (2), its upper end is provided with a depression, is provided with concrete floor (8) in depression；Described concrete floor (8) carry bitumen mixture specimen (7) above；The lower end of described test specimen stopper slot (2) is cylinder, the axis side of this cylinder To identical with connecting shaft (5)；

Pressure-bearing platform (1), it is used for accepting test specimen stopper slot (2)；Pressure-bearing platform (1) upper end is matched with the lower end of test specimen stopper slot (2) Close.

2. Colophonium feed supplement according to claim 1 entirety caking property evaluating apparatus are it is characterised in that described pressure head (3) Lower end is provided with rubber squeeze head (4).

3. Colophonium feed supplement according to claim 1 entirety caking property evaluating apparatus are it is characterised in that concrete floor (8) For c50 concrete floor, rough surface thereon.

4. Colophonium feed supplement according to claim 1 entirety caking property evaluating apparatus are it is characterised in that described forcing press (6) It is provided with pressure transducer, it with real time record pressure value, and can pass through computer drawing pressure versus time image.

5. a kind of Colophonium feed supplement entirety caking property evaluation methodology is it is characterised in that comprise the following steps:

Step i: the concrete floor (8) being connected with bitumen mixture specimen (7) is put in test specimen stopper slot (2), adjustment The angle of pressure head (3) and test specimen stopper slot (2) is so as to consistent；

Step ii: start forcing press (6), bitumen mixture specimen (7) is loaded；The pressure that pressure transducer (6) is provided with Force transducer real time record pressure value, and pass through computer drawing pressure versus time image；

Step iii: when obvious snap point in the pressure versus time image of computer real-time depiction, you can judge Colophonium mixing Effective bonding, the record place of fractureing pressure is lost between material test specimen (7) destruction or bitumen mixture specimen (7) and concrete floor (8) Power f and pressure head inclined angle alpha, and contact area a of known asphalt and concrete floor (8)；

Step iv: calculate direct stress σ and shearing stress τ suffered by bitumen mixture specimen (7) according to below equation,

$\mathrm{\σ}=\frac{f}{a}{\cos }^2\mathrm{\α}$

$\mathrm{\τ}=\frac{f}{2a}sin2\mathrm{\α}$

Wherein: σ represents direct stress, τ represents shearing stress, and f represents forcing press instantaneous pressure, a represent bitumen mixture specimen (7) with The contact area of concrete floor (8), α represents pressure head inclination angle.