CN111791337A

CN111791337A - Former, vibration testing device and asphalt usage judgment rapid testing method

Info

Publication number: CN111791337A
Application number: CN202010444006.3A
Authority: CN
Inventors: 周艳东; 晓夏; 张文; 张思杰
Original assignee: Overseas Branch Of Cccc First Public Co Group Co ltd
Current assignee: CCCC First Highway Engineering Co Ltd
Priority date: 2020-05-22
Filing date: 2020-05-22
Publication date: 2020-10-20
Anticipated expiration: 2040-05-22
Also published as: CN111791337B; WO2021232869A1

Abstract

The invention provides a former, a vibration inspection device and a rapid inspection method for asphalt dosage judgment, which relate to the technical field of civil engineering and comprise the following steps: the filling cylinder is of a step structure and two ends of the filling cylinder are communicated; the packing cylinder comprises a first side cylinder and a second side cylinder which are mutually spliced; the clamping mechanism comprises a clamping joint and a clamping groove, the clamping joint is installed on the splicing surface of the first side barrel, the clamping groove is formed in the splicing surface of the second side barrel, and the first side barrel and the second side barrel are matched with the clamping groove through the clamping joint and are spliced and fixed. At the moment, a method is developed by utilizing the combination of the former and the vibrating table to intuitively and quickly judge the upper limit value of the asphalt using amount in the asphalt mixture by utilizing the hot-mix close-graded asphalt mixture with a certain gradation at a certain temperature and because of different asphalt contents and different internal viscosities, and the quick and intuitive inspection is carried out on the hot-mix close-graded asphalt mixture with a certain gradation when the asphalt using amount is designed to judge whether the designed asphalt using amount is too high or not.

Description

Former, vibration testing device and asphalt usage judgment rapid testing method

Technical Field

The invention relates to the technical field of civil engineering, in particular to a former, a vibration inspection device and a rapid inspection method for asphalt dosage judgment.

Background

As a widely used pavement structure material, the quality of the mix proportion design quality level of the asphalt concrete directly influences the technical performance of the asphalt concrete, wherein the optimal asphalt dosage of the asphalt mixture obviously influences the performance of the asphalt mixture. The design methods of the dense-graded asphalt mixture with different technical standards, such as the design method given by the American MS-2 design method, the technical specification of the Chinese JTG F40-2004 highway asphalt pavement, the design method adopted by the French LCPC test institution and the like, basically select and determine the optimal asphalt dosage of the asphalt mixture by different technical index combinations, combining external environmental factors, traffic characteristics and the like.

In the French NF standard, the modulus of richness (Coefficienced' anondance) is adopted as a method for limiting the minimum dosage of asphalt cement in the design of asphalt mixture proportion. The Chinese JTG F40-2004 highway asphalt pavement technical specification proposes that oil film thickness is adopted to judge the minimum asphalt dosage. The asphalt consumption of the asphalt concrete changes, the performance change of the asphalt concrete is greatly influenced, the asphalt consumption of the asphalt mixture is too high and too small, the performance influence on the formed asphalt concrete is obvious, and in the practical application of engineering, each asphalt mixture needs to design an optimal asphalt consumption, namely: the optimal asphalt dosage is required to be within a certain limited range, cannot be high or low, and the engineering practice is to control the fluctuation of the asphalt dosage according to the +0.3 percent change range of the optimal asphalt dosage determined by a design method.

However, in the prior art, there is no quick and intuitive method for judging the maximum limit value of the asphalt consumption of the asphalt mixture.

Disclosure of Invention

The invention aims to provide a former, a vibration inspection device and a rapid inspection method for judging the asphalt consumption, and aims to solve the technical problem that the asphalt consumption of an asphalt mixture cannot be visually judged in the prior art.

The invention provides a former, comprising:

the packing cylinder is of a step structure, and two ends of the packing cylinder are communicated;

the packing cylinder comprises a first side cylinder and a second side cylinder which are mutually spliced;

the clamping mechanism comprises a clamping joint and a clamping groove, the clamping joint is installed on the splicing surface of the first side barrel, the clamping groove is formed in the splicing surface of the second side barrel, and the first side barrel and the second side barrel are matched and spliced fixedly through the clamping joint and the clamping groove.

Further, the former further includes:

the limiting mechanism comprises a limiting plate and an elastic piece;

the limiting plate is elastically assembled on the inner wall of the clamping groove through the elastic piece, and the plate surface of the limiting plate faces the notch of the clamping groove; the cross-sections of the clamping joint and the clamping groove are both matched L-shaped.

Further, the former further includes:

the cylinder cover is provided with a shaft hole;

the rotating shaft is arranged on the top end face of the packing cylinder; the barrel cover is rotatably assembled at the upper end of the packing barrel through the rotating shaft and the shaft hole.

Furthermore, a positioning column is arranged at the top of the rotating shaft, and a positioning ball is arranged at the top of the positioning column;

the elastic limiting piece shields a part of area of an opening of the positioning hole so as to elastically limit the positioning ball to enter and exit the positioning hole.

the positioning ball is arranged in the shaft hole, the positioning hole corresponds to the positioning ball, the positioning hole is of a spherical structure matched with the positioning ball, and the positioning ball is a rubber ball.

The present invention also provides a vibration testing apparatus comprising:

a former as claimed in any one of claims 1 to 5;

a vibration table;

and the former is positioned and assembled on the table top of the vibration table through the positioning mechanism.

Further, the positioning mechanism includes:

the arc base is arranged on the table top;

the arc-shaped inserting block is arranged at the bottom of the forming device;

an arc-shaped slot is formed in the arc-shaped base, and the arc-shaped inserting block is spliced and assembled with the arc-shaped slot.

Furthermore, the arc-shaped slot is formed in the side wall of the arc-shaped base, and the side wall of the arc-shaped insertion block is provided with an insertion part which is inserted into the arc-shaped slot;

or the arc-shaped slot is arranged inside the arc-shaped base, the arc-shaped inserting block is L-shaped, and the end part of the arc-shaped inserting block is spliced and assembled with the arc-shaped slot.

Furthermore, crisscross scale marks are arranged on the table top.

The invention also provides a rapid detection method for judging the asphalt using amount, which is based on the vibration detection device; the method comprises the following steps:

placing the former on a table top of the vibrating table;

filling the inner cavity of the former with a prepared sample, starting the vibration table to tap the sample, and then removing the former;

starting the vibration table again to collapse the sample into a cone-like structure under the vibration effect, and measuring the height H and the average diameter D of the collapsed sample;

and changing the asphalt cementation dosage of the sample, repeating the steps, and selecting the corresponding sample proportion when the height-diameter ratio H/D is the maximum value.

In the technical scheme, a method is developed by utilizing the combination of the former and the vibrating table under the condition that the hot-mix close-graded asphalt mixture with a certain gradation has different internal viscosity due to different asphalt contents at a certain temperature, the method can intuitively and quickly judge the high limit value of the asphalt consumption in the asphalt mixture, and when the asphalt consumption of the hot-mix asphalt mixture with a certain gradation is designed, the quick and intuitive inspection is carried out to judge whether the designed asphalt consumption is too high.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a perspective view of a packing cartridge provided in accordance with one embodiment of the present invention;

FIG. 2 is a plan view of the packing cartridge shown in FIG. 1;

FIG. 3 is a plan exploded view of the stuffing cylinder of FIG. 1;

FIG. 4 is an enlarged fragmentary view of the packing cartridge of FIG. 1;

FIG. 5 is a plan exploded view 2 of the stuffing cartridge of FIG. 1;

FIG. 6 is a plan exploded view 3 of the stuffing cartridge of FIG. 1;

FIG. 7 is a plan perspective view of the packing cartridge shown in FIG. 1;

FIG. 8 is a cross-sectional view of the packing cartridge of FIG. 1;

FIG. 9 is a cross-sectional view 2 of the packing cartridge of FIG. 1;

FIG. 10 is an enlarged partial view 1 of the packing cartridge of FIG. 8;

FIG. 11 is an enlarged partial view 2 of the packing cartridge of FIG. 8;

FIG. 12 is an enlarged partial view of the packing cartridge of FIG. 9;

FIG. 13 is a block diagram of a vibration table provided in accordance with one embodiment of the present invention;

FIG. 14 is a top view of the vibration table of FIG. 13;

FIG. 15 is a bottom block diagram of a packing cartridge according to one embodiment of the present invention shown in FIG. 1;

FIG. 16 is an assembled cross-sectional view of the positioning mechanism provided in accordance with one embodiment of the present invention, FIG. 1;

FIG. 17 is a bottom block diagram of a packing cartridge provided in accordance with one embodiment of the present invention, FIG. 2;

fig. 18 is an assembled cross-sectional view of a positioning mechanism provided in accordance with an embodiment of the present invention, fig. 2.

Reference numerals:

1. a packing cylinder; 2. a clamping mechanism; 3. a limiting mechanism; 4. a cylinder cover; 5. a vibration table; 6. a positioning mechanism;

11. a first side drum; 12. a second side tube;

21. a clamping head; 22. a clamping groove;

31. a limiting plate; 32. an elastic member;

41. a shaft hole; 42. a rotating shaft; 43. a positioning column; 44. a positioning ball; 45. positioning holes; 46. an elastic limiting sheet;

51. scale lines;

61. an arc-shaped base; 62. an arc-shaped insert block; 63. an arc slot; 64. a plug-in part.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 to fig. 3, the present embodiment provides a molding machine, including:

the packing device comprises a packing barrel 1, wherein the packing barrel 1 is of a step structure and two ends of the packing barrel 1 are communicated;

the packing cylinder 1 comprises a first side cylinder 11 and a second side cylinder 12, and the first side cylinder 11 and the second side cylinder 12 are spliced with each other to form the packing cylinder 1;

clamping mechanism 2, clamping mechanism 2 includes joint 21 and joint groove 22 of mutual joint complex, joint 21 is installed on first side section of thick bamboo 11, joint groove 22 is seted up on second side section of thick bamboo 12, first side section of thick bamboo 11 with second side section of thick bamboo 12 passes through clamping mechanism 2 splices fixedly relatively.

It should be noted that the asphalt binder, as a material for providing binding power in the asphalt mixture, has characteristics of different viscosities at different temperatures, and has a lower viscosity at high temperature (between 130 ℃ C. and 170 ℃ C.). The maximum binding power exists in the asphalt mixture under a certain temperature and a certain density state, and when the content of asphalt in the asphalt mixture is higher than a certain proportion, the redundant asphalt cementing material can cause the fluidity of the asphalt mixture to be increased, the binding power to be reduced, and the cohesiveness of asphalt concrete to be reduced and the fluidity to be increased.

Therefore, based on the characteristics, 5-7 groups of asphalt concrete samples can be prepared by using asphalt concrete gradation meeting construction requirements, the dosage of asphalt cement of each sample is increased by 0.5%, and the prepared samples are put into an oven with specified temperature for heat preservation and standby. During the test, the prepared sample is filled into the inner cavity of the former, wherein the former can also be preheated before the sample is filled. In addition, the sample can be filled more than a certain amount, for example, the sample can be filled to 2-3cm higher than the top of the former, and then the sample higher than the former is scraped off to ensure the accuracy of the test. The former is placed on the table of a vibrating table 5, the vibrating table 5 is activated to tap the sample at a frequency of 0-100Hz, amplitude of 0-5mm and duration of 0-40S, for example, at 50Hz for 3 seconds to tap the sample, and the former is removed.

In the removing process, since the packing cylinder 1 is formed by assembling the first side cylinder 11 and the second side cylinder 12 together at the time of formation, the first side cylinder 11 and the second side cylinder 12 together form the integral structure of the packing cylinder 1 and together form the inner cavity of the packing cylinder 1. Therefore, the stuffing cylinder 1 can be quickly removed only by relatively separating the first side cylinder 11 and the second side cylinder 12, and the removal process does not influence the vibrated sample, thereby ensuring the stability of the inspection process.

Wherein, the former is a trumpet-shaped container, namely a structure of a step cylinder. The specification of a forming device used by matching the 10mm grain diameter mixture is that the upper opening D1 is 8cm, the lower opening D2 is 15.2cm, and the height H is 15.2 cm; the specification of a forming device used by matching the mixture with the particle size of 14mm is that an upper opening D1 is 10cm, a lower opening D2 is 19cm, and a height H is 19.2 cm; the specifications of a forming device used for mixing the 20mm grain diameter mixture are that the upper opening D1 is 12.5cm, the lower opening D2 is 23.8cm, and the height H is 24 cm.

After removal, the vibration table 5 is started again, and the sample can collapse into a cone-like structure under the action of vibration by the vibration, wherein the vibration frequency is adjustable from 0Hz to 100Hz, the amplitude is adjustable from 0mm to 5mm, and the vibration time is adjustable from 0S to 40S, for example, working at the frequency of 70Hz for 3 seconds. In this case, the height H and the average diameter D of the collapsed sample are measured, and the height-to-diameter ratio H/D of the sample at this time can be obtained from the height H and the average diameter D. According to the operation steps, the asphalt cementation dosage of the sample can be changed, and the steps are repeated.

For example, the asphalt cement usage of each sample is increased by 0.5%, then a plurality of tests are performed, the finally obtained result is a coordinate graph with the asphalt cement usage as a horizontal axis and the height-to-diameter ratio H/D as a vertical axis, and the peak point is the maximum asphalt cement usage of the asphalt mixture under the gradation, that is, the sample proportion corresponding to the maximum height-to-diameter ratio H/D is selected as the maximum asphalt cement usage.

If the result precision needs to be improved, two groups of samples prepared by increasing the dosage of the asphalt cement by 0.2 percent increment can be continuously prepared on the basis of the result to carry out supplementary experiments, and the result with higher precision can be obtained by adopting the same method and step operation. Meanwhile, the parallel experiment can be carried out for 3-5 times under the condition of ensuring that the sample is at a certain temperature, and then the average value of the data of each time is taken as the test result after the result with large deviation is removed. In the inspection process, instruments such as a non-contact infrared thermometer and the like can be used for measuring the temperature of the sample, so that data comparison at the later stage is facilitated. For the checking mode and times, those skilled in the art can adjust the checking mode and times according to the requirements, and the detailed description is omitted here.

Therefore, the filling and detection work of the sample can be rapidly carried out by utilizing the forming device, and the optimal asphalt using amount in the asphalt mixture can be visually judged through the forming device so as to carry out rapid and visual inspection and design on the ratio in the asphalt mixture.

As shown in fig. 3 and 4, the former further includes:

the limiting mechanism 3 comprises a limiting plate 31 and an elastic piece 32;

the limiting plate 31 is elastically assembled on the inner wall of the clamping groove 22 through the elastic member 32, and the surface of the limiting plate 31 faces the notch of the clamping groove 22; the cross sections of the clamping head 21 and the clamping groove 22 are both matched L-shaped.

Therefore, when the clamping head 21 enters the groove along the groove shape of the clamping groove 22, the clamping head can elastically abut against the limiting plate 31, and the clamping head 21 can be stably clamped in the clamping groove 22 through the elastic force of the elastic piece 32 between the limiting plate 31 and the inner wall of the groove, so that the packing cylinder 1 formed by jointly splicing the first side cylinder 11 and the second side cylinder 12 is firmer. The elastic member 32 may be a member having an elastic force such as a spring.

As shown in fig. 5 to 12, the former further includes: the cylinder cover 4 is provided with a shaft hole 41;

a rotating shaft 42, wherein the rotating shaft 42 is installed on the top end surface of the packing cylinder 1; the rotating shaft 42 and the shaft hole 41 are rotatably assembled, and the barrel cover 4 is rotatably assembled on the top end surface of the stuffing barrel 1 through the rotating shaft 42 and the shaft hole 41.

Therefore, when the sample higher than the molding device is scraped, the sample can be scraped by a straight steel edge or the like manually, or can be scraped by the cover 4. At this point, the lid 4 can be rotated to move the lid 4 along the top of the former, scraping the sample above the former off the top of the former. Wherein, in order to make the cylinder cover 4 have better scraping effect, the edge of the cylinder cover 4 can be pointed.

As shown in fig. 10 and 11, a positioning column 43 is disposed on the top of the rotating shaft 42, and a positioning ball 44 is disposed on the top of the positioning column 43; a positioning hole 45 corresponding to the positioning ball 44 is disposed inside the shaft hole 41, at least one elastic limiting piece 46 is disposed inside the shaft hole 41, and the elastic limiting piece 46 covers a part of the opening area of the positioning hole 45 so as to elastically limit the positioning ball 44 to enter and exit the positioning hole 45.

Therefore, when the positioning ball 44 is inserted into the positioning hole 45, the elastic force of the elastic limiting piece 46 is firstly limited, and the elastic limiting piece 46 has an elastic deformation effect, so that when the positioning ball 44 applies an acting force to the elastic limiting piece 46, the elastic limiting piece 46 can be deformed, and the positioning ball 44 is allowed to enter the positioning hole 45. After the positioning ball 44 passes the elastic limiting sheet 46 and enters the positioning hole 45, the elastic limiting sheet 46 will recover to its original shape. Similarly, the elastic limiting piece 46 limits the positioning ball 44 from coming out of the positioning hole 45 from the opposite direction, and when the positioning ball 44 applies a force to the elastic limiting piece 46 from the opposite direction, the elastic limiting piece 46 is deformed, so as to allow the positioning ball 44 to come out of the positioning hole 45.

As shown in fig. 12, a positioning column 43 is disposed on the top of the rotating shaft 42, and a positioning ball 44 is disposed on the top of the positioning column 43;

a positioning hole 45 corresponding to the positioning ball 44 is arranged in the shaft hole 41, the positioning hole 45 is in a spherical structure matched with the positioning ball 44, and the positioning ball 44 is a rubber ball.

This rubber ball has elastic deformation's effect, consequently, pegs graft at the in-process of locating hole 45 as the rubber ball, can deform and extrude into in the locating hole 45, and after the rubber ball entered into in the locating hole 45, the rubber ball can resume former shape to form with locating hole 45 and agree with, stable assembly is in locating hole 45. Similarly, when the rubber ball comes out of the positioning hole 45, the rubber ball is deformed to extrude out of the positioning hole 45, and after the rubber ball comes out of the positioning hole 45, the rubber ball is restored to the original shape.

The present invention also provides a vibration testing apparatus as shown in fig. 13 to 18, including the former; the vibration inspection apparatus further includes: a vibration table 5; and the former is positioned and assembled on the table top of the vibration table 5 through the positioning mechanism 6. Therefore, when the test of the sample is performed, the test can be performed by the vibration testing device, and since the detailed structure, the functional principle and the technical effect of the former are already described in detail, the detailed description is omitted here. Reference is made to the preceding text for any technical matter relating to such formers.

Wherein, when the former is placed on the vibration table 5, the former can be positioned and installed through the positioning mechanism 6. Because the table top is provided with the crisscross scale marks 51 which can be used for conveniently measuring the average diameter D, the former can be arranged at the central position of the vibration table 5 through the positioning mechanism 6 and is matched with the scale marks 51, and the inspection efficiency is improved.

As shown in fig. 13 and 14, the positioning mechanism 6 includes: at least one arc-shaped base 61, wherein the arc-shaped base 61 is arranged on the table top; at least one arc-shaped insert block 62, wherein the arc-shaped insert block 62 is arranged at the bottom of the former; an arc-shaped slot 63 is formed in the arc-shaped base 61, and the arc-shaped insertion block 62 is assembled with the arc-shaped slot 63 in an inserting mode. Therefore, the arc-shaped insert block 62 can be inserted into the arc-shaped slot 63, so that the former can be installed at the center of the vibration table 5 by the positioning mechanism 6 consisting of the arc-shaped insert block 62 and the arc-shaped slot 63.

As shown in fig. 15 to 18, the arc-shaped slot 63 is formed in a side wall of the arc-shaped base 61, and an insertion portion 64 inserted into the arc-shaped slot 63 is formed in a side wall of the arc-shaped insertion block 62. At this time, the insertion portion 64 of the arc insertion block 62 can be inserted into the arc insertion groove 63 by rotating the former after being butted on the table top.

Arc slot 63 sets up the inside of arc base 61, arc inserted block 62 is the L type, arc inserted block 62's tip with arc slot 63 grafting assembly. Similarly, at this time, the L-shaped arc insertion block 62 can be directly inserted into the arc insertion groove 63 by rotating after the former is butted on the table top.

The invention also provides a rapid detection method for judging the asphalt using amount, which is based on the vibration detection device; the method comprises the following steps: placing the former on the table of the vibrating table 5; filling the cavity of the former with the prepared sample, starting the vibration table 5 to tap the sample, and then removing the former; starting the vibration table 5 again to collapse the sample into a cone-like structure under the vibration effect, and measuring the height H and the average diameter D of the collapsed sample; and changing the asphalt cementation dosage of the sample, repeating the steps, and selecting the corresponding sample proportion when the height-diameter ratio H/D is the maximum value. Since the detailed structure, functional principle and technical effect of the former have been described in detail, and the selection method using the former is also described, further description is omitted here. Reference is made to the preceding text for any technical matter relating to such formers.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A former, comprising:

2. A former as claimed in claim 1, further comprising:

the limiting mechanism comprises a limiting plate and an elastic piece;

3. A former as claimed in claim 1, further comprising:

the cylinder cover is provided with a shaft hole;

4. The former as claimed in claim 3 wherein a locating post is provided on the top of the shaft, and a locating ball is provided on the top of the locating post;

5. The former as claimed in claim 3 wherein a locating post is provided on the top of the shaft, and a locating ball is provided on the top of the locating post;

6. A vibration testing apparatus, comprising:

a former as claimed in any one of claims 1 to 5;

a vibration table;

7. The vibration testing apparatus of claim 6, wherein said positioning mechanism comprises:

the arc base is arranged on the table top;

the arc-shaped inserting block is arranged at the bottom of the forming device;

8. The vibration testing device according to claim 7, wherein the arc-shaped slot is formed in a side wall of the arc-shaped base, and an insertion part which is inserted and assembled with the arc-shaped slot is arranged on the side wall of the arc-shaped insertion block;

9. A vibration testing device according to any of claims 6-8, wherein a criss-cross scale is provided on said table.

10. A method for quick testing asphalt quantity judgment, which is characterized in that the vibration testing device according to any one of claims 6 to 9; the method comprises the following steps:

placing the former on a table top of the vibrating table;