CN115420678A - A Quantitative Test Device for Hard Asphalt Interface Adhesion - Google Patents

Abstract

The invention discloses a quantitative testing device for interface adhesiveness of hard asphalt, which comprises a sample slide, wherein an asphalt sample is fixedly arranged on the front surface of the sample slide; the transparent cover plate is positioned between the transparent cover plate and the sample slide, and the transparent cover plate applies pressure required by testing to the asphalt sample by covering the asphalt sample; the sample slide is driven by the pulling mechanism to translate, the sample slide is driven by the pulling mechanism to move, the asphalt sample on the sample slide is pressed through the transparent cover plate, so that the sample slide leaves a stripping trace on the transparent cover plate, the transparent cover plate facilitates real-time observation and measurement of the stripping trace under the condition of not contacting the asphalt sample, and real-time quantitative detection of asphalt adhesiveness is facilitated.

Description

A Quantitative Test Device for Hard Asphalt Interface Adhesion

technical field

The invention relates to the technical field of asphalt adhesion detection, in particular to a quantitative test device for hard asphalt interface adhesion.

Background technique

The adhesion between asphalt and stone refers to the adhesion and anti-stripping performance of the asphalt film on the surface of the stone. In asphalt pavement, asphalt should have good adhesion to stone.

The conventional method for evaluating the adhesion between asphalt and stone is the water boiling method, but this method is evaluated by the comparison method, which is greatly affected by human factors, and only reflects the loss of adhesion but not the loss of cohesion.

Although there is currently a method for quantitative testing of asphalt adhesion, the lack of special testing equipment makes it inconvenient during the testing process. If it is necessary to pressurize the asphalt sample with a heavy object, the peeling test will Asphalt samples were peeled off in cellophane, etc.

Contents of the invention

The object of the present invention is to provide a kind of quantitative test device of hard asphalt interface adhesion, to solve the technical problem of inconvenient test operation caused by the lack of special quantitative test device in the prior art.

In order to solve the above technical problems, the present invention specifically provides the following technical solutions:

A quantitative test device for hard asphalt interface adhesion, comprising:

A sample carrier, the asphalt sample is fixedly arranged on the front of the sample carrier;

A transparent cover plate, the asphalt sample is located between the transparent cover plate and the sample carrier, and the transparent cover plate is applied to the asphalt sample by covering the asphalt sample. pressure;

A pulling mechanism, the sample slide is connected to the pull mechanism, and the sample slide is driven by the pull mechanism to move in translation, so that the asphalt sample is peeled off from the fixed transparent cover .

As a preferred solution of the present invention, the transparent cover is located above the sample slide.

As a preferred solution of the present invention, the pulling mechanism includes a base and a rodless cylinder on which the sample slide is installed, and the rodless cylinder is horizontally arranged on the base through a height adjustment assembly;

The rodless cylinder is lifted and positioned by the height adjustment assembly, so that when the asphalt sample is set on the sample slide, the rodless cylinder is away from the transparent cover, and the rodless cylinder The rod cylinder resets after the asphalt sample is set, so that the transparent cover plate applies the pressure required for testing to the asphalt sample.

As a preferred solution of the present invention, the height adjustment assembly includes a vertical guide rail and a lifting cylinder, the two ends of the rodless cylinder are installed with the vertical guide rail vertically, and the base is provided with a sink vertical grooves are vertically arranged on the groove walls at both ends of the sinking groove; The other end is connected with the rodless cylinder.

As a preferred solution of the present invention, one end of the transparent cover plate is rotated on the base through a positioning shaft, and the transparent cover plate is rotated sideways to deviate from the sample slide;

And the base is provided with a fixing assembly, the fixing assembly fixes the transparent cover aligned with the sample slide by connecting the transparent cover, the sinker is located between the positioning shaft and the between the fixed components described above.

As a preferred solution of the present invention, the fixing assembly includes an arc-shaped track and a positioning plate both arranged on the base, the arc-shaped track is concentric with the positioning shaft, and the transparent cover plate is slidably arranged on on the arc track;

The transparent cover is connected to the positioning plate through fixing bolts, and a threaded hole for screwing the fixing bolts is provided on the side of the transparent cover close to the positioning plate.

As a preferred solution of the present invention, the end of the transparent cover away from the positioning shaft is fixedly provided with a slider, the threaded hole is arranged on the slider, and the transparent cover passes through the slider. The blocks are slidably supported on the arc track;

There is an arc guide rail with a "T"-shaped section on the arc track, the arc guide rail is concentric with the positioning shaft, and the slider has an arc guide rail adapted to the shape of the arc guide rail. The arc-shaped guide rail is installed in the arc-shaped guide groove and can slide along the arc-shaped guide groove.

As a preferred solution of the present invention, the positioning plate is located at one end of the arc track, so that the positioning plate can stop the transparent cover at a position aligned with the sample slide.

As a preferred solution of the present invention, the transparent cover plate is provided with a scale for measuring the peeling length of the asphalt sample.

As a preferred solution of the present invention, a transparent thin plate is detachably mounted on the bottom of the transparent cover.

Compared with the prior art, the present invention has the following beneficial effects:

The invention drives the sample carrier to move through the pulling mechanism, and presses the asphalt sample on the sample carrier through the transparent cover, so that the sample carrier leaves peeling marks on the transparent cover, and the transparent The transparent cover plate facilitates the real-time observation and measurement of the peeling marks without touching the asphalt sample, so as to facilitate the real-time quantitative detection of the asphalt adhesion.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings that are required in the description of the embodiments or the prior art. Apparently, the drawings in the following description are only exemplary, and those skilled in the art can also obtain other implementation drawings according to the provided drawings without creative work.

Fig. 1 is the overall structure schematic diagram of the present invention;

Fig. 2 is a schematic structural view of the arc track of the present invention.

The labels in the figure are respectively indicated as follows:

1-sample slide; 2-transparent cover plate; 3-pull mechanism; 4-height adjustment component; 5-sinking groove; 6-vertical groove; 7-positioning shaft; - threaded hole; 11 - slider; 12 - arc guide rail; 13 - arc guide groove; 14 - scale; 15 - transparent thin plate;

301-base; 302-rodless cylinder;

401-vertical guide rail; 402-lift cylinder;

801-arc track; 802-positioning plate.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

As shown in Fig. 1 and Fig. 2, the present invention provides a kind of quantitative testing device of hard asphalt interfacial adhesion, comprising:

Sample carrier 1, the asphalt sample is fixedly arranged on the front of sample carrier 1;

Transparent cover plate 2, the asphalt sample is located between the transparent cover plate 2 and the sample carrier 1, the transparent cover plate 2 applies the pressure required for the test to the asphalt sample by covering the asphalt sample, and the transparent cover plate 2 and The contact surfaces of the sample slide 1 and the asphalt sample are all horizontal;

Pulling mechanism 3, the sample carrier 1 is connected with the pulling mechanism 3, and the sample carrier 1 is driven by the pulling mechanism 3 to move in translation, so that the asphalt sample is peeled off on the fixed transparent cover 2.

Specifically, the asphalt is solidified in sheet form on a sheet-shaped base material to form an asphalt sample, and the prepared asphalt sample is fixed to the sample carrier 1 directly or after being soaked in water for a period of time according to the test requirements. And apply pressure to the asphalt sample through the transparent cover 2, so that the asphalt surface of the asphalt sample contacts the transparent cover 2 with the pressure required for the test. Then, the pulling mechanism 3 pulls the sample carrier sheet 1 horizontally with the required pulling force of the test, and after a period of time, observe the peeling marks of the asphalt sample on the transparent cover plate 2, and then collect the required data, such as the asphalt sample on the transparent cover plate 2. The peeling length on the cover plate 2 and the average width of the bonding surface with the transparent cover plate 2 are combined with parameters such as tensile force to calculate the peel strength of the asphalt sample, that is, to quantitatively calculate the interfacial adhesion of the cured asphalt.

Among them, the calculation method of asphalt peeling strength can be obtained by performing multiple tests on various asphalts with known peeling strengths, and analyzing based on the peeling length-peeling force curve, to obtain the relationship between the peeling strength of the asphalt per unit area, the peeling force and the peeling length The formula, and then the quantitative calculation of the peel strength of the tested asphalt is realized through the obtained formula and test data. For the convenience of understanding, an example is given by using the existing calculation formula of peel strength, for example:

In the above formula, C is the force N/m represented by the unit length of the composite coordinate axis of the peeling curve; S is the area enclosed by the peeling curve within the peeling length, ^m2 ; B is the average width of the bonded surface of the sample in m; L is the peeling length m. Among them, the glass length refers to the initial 15mm peeling length on the discarded glass curve, and the 10mm peeling length before the termination. References: A New Method for Quantitative Testing of Asphalt Adhesion, Authors: Xu Mingyao, Li Xiaolin, Zhang Liqun.

Further, the preparation of the asphalt sample can also refer to the above-mentioned references, that is, the asphalt is heated in an oven at 120 ° for 1 h, washed with distilled water and then dried, and then the asphalt is coated on the absorbent cotton gauze as the base material, and placed on the 2min in 120° oven.

The present invention drives the sample carrier 1 to move through the pulling mechanism 3, and presses the asphalt sample on the sample carrier 1 through the transparent cover 2, so that the sample carrier 1 is placed on the transparent cover 2 Leaving traces of peeling, while the transparent transparent cover plate 2 facilitates real-time observation and measurement of the peeling traces without contacting the asphalt sample, thereby facilitating real-time quantitative detection of asphalt adhesion.

Preferably, the transparent cover 2 is located above the sample carrier 1 , so as to facilitate the placement of the asphalt sample on the asphalt carrier, and facilitate the observation and measurement of peeling marks on the transparent cover 2 .

Wherein, the pulling mechanism 3 includes a base 301 and a rodless cylinder 302 on which the sample slide 1 is installed, and the rodless cylinder 302 is horizontally arranged on the base 301 through the height adjustment assembly 4 .

The rodless cylinder 302 is lifted and positioned by the height adjustment assembly 4, so that the rodless cylinder 302 is far away from the transparent cover plate 2 when the asphalt sample is set on the sample carrier 1, and the rodless cylinder 302 is placed on the asphalt sample. Reset after being finished, so that the transparent cover plate 2 applies the pressure required for the test to the asphalt sample.

Further optimization on the above embodiment is that the height adjustment assembly 4 includes a vertical guide rail 401 and a lifting cylinder 402, the two ends of the rodless cylinder 302 are equipped with a vertical guide rail 401 arranged vertically, and the base 301 is provided with a sinker 5. Vertical grooves 6 are arranged vertically on the groove walls at both ends of the sinking groove 5. The vertical guide rail 401 is slidingly matched with the vertical groove 6. One end of the lifting cylinder 402 is embedded in the groove wall of the sinking groove 5 and the other end is connected to the vertical groove 6. The rod cylinder 302 is connected.

The purpose of setting up the lifting cylinder 402 is that, in addition to being able to drive the rodless cylinder 302 to reset, the lifting cylinder 402 can also realize the transparent cover plate 2 to passively adjust the pressure on the asphalt sample, so as to meet the requirements of testing the asphalt sample under different pressure conditions. Glass data requirements.

For further convenience, the asphalt sample is placed and fixed on the sample carrier 1 under the transparent cover 2, one end of the transparent cover 2 is rotated on the base 301 by the positioning shaft 7, and the transparent cover 2 deviates from Sample carrier 1, so as to facilitate the fixation of the asphalt sample on the sample carrier 1. And, the base 301 is provided with a fixing assembly 8, and the fixing assembly 8 fixes the transparent cover plate 2 aligned with the sample carrier 1 by connecting the transparent cover plate 2, so that the transparent cover plate 2 remains horizontal to ensure the asphalt sample The force is uniform, and the sinking groove 5 is located between the positioning shaft 7 and the fixing assembly 8 .

Wherein, the fixing assembly 8 includes an arc track 801 and a positioning plate 802 both arranged on the base 301, the arc track 801 and the positioning shaft 7 have the same circle center, and the transparent cover plate 2 is slidably supported on the arc track 801, so that the transparent cover When the plate 2 deviates from the sample carrier 1, it can still be supported on the horizontally arranged arc track 801, so as to avoid the horizontality of the transparent cover 2 from changing when the transparent cover 2 is rotated, and the positioning of the transparent cover 2 The matching accuracy between the shafts 7 and between the positioning shaft 7 and the base 301 has a negative impact, resulting in uneven pressure on the asphalt sample by the transparent cover plate 2 .

Moreover, the transparent cover plate 2 is connected to the positioning plate 802 through the fixing bolt 9 at the position aligned with the sample slide 1, and the side of the transparent cover plate 2 facing the positioning plate 802 is provided with a threaded hole 10 for the fixing bolt 9 to be screwed into. .

Further, the other end of the transparent cover 2 relative to the positioning shaft 7 is fixedly provided with a slider 11, the threaded hole 10 is provided on the slider 11, and the transparent cover 2 is slidably supported on the arc track 801 by the slider 11 In order to avoid changes in the level of the transparent cover 2 due to wear and tear of the transparent cover 2, the slider 11 can be made of wear-resistant materials, or be replaced after wear and tear. Arc-shaped guide rail 12, the arc-shaped guide rail 12 is concentric with the positioning shaft 7, the slider 11 has an arc-shaped guide groove 13 adapted to the shape of the arc-shaped guide rail 12, and the arc-shaped guide rail 12 and the arc-shaped guide groove 13 are slidably mated , so as to prevent the transparent cover plate 2 from being bent upwards, damaged and loosened due to operation, mis-touching and other reasons after the transparent cover plate 2 is detached from the fixing bolt 9 .

Preferably, the positioning plate 802 is located at one end of the arc track 801 , so that the positioning plate 802 can stop the transparent cover plate 2 at a position aligned with the sample slide 1 .

Further optimization on the foregoing embodiment is that the transparent cover plate 2 is provided with a scale 14 for measuring the peeling length of the asphalt sample, and the scale 14 is arranged along the translation path of the sample slide 1 to facilitate direct measurement and reading of the peeling length and asphalt sample bonding surface width.

Moreover, the bottom of the transparent cover plate 2 is detachably mounted with a transparent thin plate 15 by means of screws, plug connections, etc., and contacts the asphalt sample through the transparent thin plate 15, thereby solving the problem that the asphalt sample is directly in contact with the transparent cover plate 2, because the transparent cover plate 2 It is not easy to disassemble and assemble, which leads to the disadvantage of inconvenient cleaning of the transparent cover plate 2 .

The above embodiments are only exemplary embodiments of the present application, and are not intended to limit the present application, and the protection scope of the present application is defined by the claims. Those skilled in the art may make various modifications or equivalent replacements to the present application within the spirit and protection scope of the present application, and such modifications or equivalent replacements shall also be deemed to fall within the protection scope of the present application.

Claims (10)

1. A quantitative testing device for hard asphalt interfacial adhesion, characterized in that it comprises: A sample carrier (1), the asphalt sample is fixedly arranged on the front of the sample carrier (1); A transparent cover (2), the asphalt sample is located between the transparent cover (2) and the sample carrier (1), the transparent cover (2) is covered by the asphalt sample come up to apply the pressure required for the test to the asphalt sample; A pulling mechanism (3), the sample slide (1) is connected to the pull mechanism (3), and the sample slide (1) is driven by the pull mechanism (3) to translate, so that the The asphalt sample is peeled off on the fixedly arranged transparent cover plate (2). 2. The quantitative testing device of a kind of hard asphalt interface adhesion according to claim 1, characterized in that, the transparent cover plate (2) is located above the sample slide (1). 3. the quantitative testing device of a kind of hard asphalt interface adhesion according to claim 1, is characterized in that, described pulling mechanism (3) comprises base (301) and described sample slide (1) is installed ), the rodless cylinder (302) is horizontally arranged on the base (301) through a height adjustment assembly (4); The rodless cylinder (302) is lifted and positioned by the height adjustment assembly (4), so that the rodless cylinder (302) sets the asphalt sample on the sample slide (1) away from the transparent cover (2), and reset the rodless cylinder (302) after the asphalt sample is set, so that the transparent cover (2) applies the test to the asphalt sample required pressure. 4. the quantitative testing device of a kind of hard asphalt interfacial adhesion according to claim 3, is characterized in that, described height adjusting assembly (4) comprises vertical guide rail (401) and lifting cylinder (402), so Both ends of the rodless cylinder (302) are equipped with the vertical guide rails (401) arranged vertically, the base (301) is provided with a sinker (5), and the sinker (5) at both ends Vertical grooves (6) are vertically arranged on the walls of the grooves, the vertical guide rails (401) slide and fit with the vertical grooves (6), and one end of the lifting cylinder (402) is embedded in the sinking groove ( 5) and the other end is connected with the rodless cylinder (302). 5. the quantitative testing device of a kind of hard asphalt interface adhesion according to claim 3, is characterized in that, one end of described transparent cover plate (2) is arranged on described base ( 301), the transparent cover (2) deviates from the sample slide (1) by rotating sideways; And the base (301) is provided with a fixing component (8), and the fixing component (8) aligns the transparent cover plate (2) with the sample slide (1) by connecting the transparent cover plate (2). The cover plate (2) is fixed, and the sinker (5) is located between the positioning shaft (7) and the fixing assembly (8). 6. the quantitative testing device of a kind of hard asphalt interface adhesion according to claim 5, is characterized in that, described fixing assembly (8) comprises the arc track ( 801) and a positioning plate (802), the arc track (801) is concentric with the positioning shaft (7), and the transparent cover plate (2) is slidably arranged on the arc track (801); The transparent cover plate (2) is connected with the positioning plate (802) through fixing bolts (9), and the side of the transparent cover plate (2) close to the positioning plate (802) is provided with a The threaded hole (10) into which the bolt (9) is screwed. 7. the quantitative testing device of a kind of hard asphalt interface adhesion according to claim 6, is characterized in that, one end of described transparent cover plate (2) away from described positioning shaft (7) is fixedly provided with a slide block (11), the threaded hole (10) is set on the slider (11), and the transparent cover (2) is slidably supported on the arc track (801) by the slider (11) )superior; The arc track (801) has an arc guide rail (12) with a "T" shape in section, the arc guide rail (12) is concentric with the positioning shaft (7), and the slider (11) There is an arc-shaped guide groove (13) adapted to the shape of the arc-shaped guide rail (12), and the arc-shaped guide rail (12) is installed in the arc-shaped guide groove (13) and can be The groove (13) slides. 8. the quantitative testing device of a kind of hard asphalt interface case adhesion according to claim 6, is characterized in that, described positioning plate (802) is positioned at an end of described arc track (801), so that positioning A plate (802) is able to stop the transparent cover (2) in position aligned with the sample slide (1). 9. the quantitative testing device of a kind of hard asphalt interfacial adhesion according to claim 1, is characterized in that, described transparent cover plate (2) is provided with the scale that is used to measure the peeling length of described asphalt sample (14). 10. A quantitative test device for hard asphalt interface adhesion according to claim 1, characterized in that a transparent thin plate (15) is detachably mounted on the bottom of the transparent cover (2).

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