Testing device for evaluating permeability of asphalt crack
By designing a testing device that includes a glass panel and a clay or loess panel, combined with a metal rod and a funnel device, the problem of difficulty in assessing the flow of asphalt within irregular cracks was solved, enabling a direct assessment of asphalt permeability and improving the accuracy of road maintenance selection.
Patent Information
- Application Number
- CN202520167834.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-24
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-01-24
AI Technical Summary
Existing technologies lack effective methods to evaluate the flowability of asphalt within irregular cracks, which affects the assessment of the permeability of asphalt products within cracks.
A testing device was designed, comprising parallel glass panels and clay or loess panels to simulate road surface cracks, combined with a metal rod and funnel device, to evaluate the permeability of asphalt under gravity.
It provides an intuitive method to assess the permeability of asphalt within cracks, helping to select suitable asphalt products for road maintenance and improving the convenience and accuracy of the assessment.
Smart Images
Figure CN223910744U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a highway maintenance technical field, specifically to a kind of test device for evaluating the seepage capacity of asphalt material for road surface crack pouring. BACKGROUND
[0002] During the use of highway, when highway base layer and cross section still maintain well, but surface appears longitudinal and transverse cracks, with more fine expansion cracks at crack, and crack density is relatively low, using corresponding asphalt product (such as pouring sealant, high-viscosity high-elasticity asphalt) to repair these cracks, it can be a kind of preventive maintenance method for maintaining the life cycle and performance of highway.
[0003] Generally speaking, before maintaining crack part, construction site needs to be cleaned, to ensure that crack and periphery are dry and clean, and construction is generally selected under the condition of air temperature above 5 DEG C and non-rainy day.After asphalt product is filled into crack from road surface, it generally flows to crack interior by self gravity, until condensation.That is, asphalt product can be applied on crack surface by spraying or pouring after being heated to about 180 DEG C, and then flows downward under gravity, until condensation.
[0004] Crack in road surface is often irregular side wall surface, therefore, how to evaluate the flow degree of different asphalt in crack, there is not better method at present. CONTENT OF UTILITY MODEL
[0005] The utility model wants to solve the technical problem to provide a kind of test device for evaluating asphalt crack seepage capacity to solve the problem mentioned.
[0006] The utility model provides a kind of test device for evaluating asphalt crack seepage capacity. It includes the first panel and the second panel of parallel fixed setting.
[0007] Preferably, the spacing between the first face and the second panel is 3mm or 5mm.
[0008] Preferably, the planar size of the first panel and the second panel is 10-12cm in length and 8-10cm in height.
[0009] Preferably, the first panel is glass plate.
[0010] Preferably, the second panel is made of clay or yellow clay, and the thickness is 15-25mm.
[0011] Preferably, the first panel is made of clay or yellow clay, and the thickness is 15-25mm.
[0012] Preferably, a plurality of metal rods with a diameter of 3mm or 5mm are arranged at the gap edge between the first panel and the second panel.
[0013] Preferably, a plurality of inner grooves are arranged on the inner wall surface of the second panel, the inner grooves are straight-angled triangular grooves with a depth L of 1-2mm and an angle a of 50-60 degrees, and the distance H1 from the uppermost inner groove to the top surface of the second panel is not less than 10mm.
[0014] Preferably, the testing device further comprises a funnel device, the funnel device comprises a base portion arranged on the first panel and the second panel, a storage portion connected above the base portion, and a holding portion connected on both sides of the storage portion.
[0015] Preferably, the funnel device is made of a metal plate with a thickness of 2-3mm, the length L1 of the funnel device is 6cm, the height H of the base portion is 15mm, and the width W of the hollow gap of the base portion is 2-3mm larger than the gap size between the first panel and the second panel.
[0016] The testing device for evaluating the crack penetration capacity of asphalt provided by the utility model can intuitively evaluate the crack penetration capacity of asphalt products, thereby providing an intuitive and convenient evaluation method for one of the performance parameters of asphalt products used for maintaining the pavement crack part. BRIEF DESCRIPTION OF DRAWINGS
[0017] The following drawings are only intended to schematically illustrate and explain the utility model, and do not limit the scope of the utility model. Among them,
[0018] Figure 1 It is a part of the sectional structure principle schematic view of a testing device for evaluating the crack penetration capacity of asphalt according to one specific embodiment of the utility model;
[0019] Figure 2 It is a part of the sectional structure principle schematic view of a testing device for evaluating the crack penetration capacity of asphalt according to one specific embodiment of the utility model; Figure 1
[0020] Figure 3 It is a part of the sectional structure principle schematic view of a testing device for evaluating the crack penetration capacity of asphalt according to one specific embodiment of the utility model; Figure 2
[0021] Figure 4 It is a part of the sectional structure principle schematic view of a testing device for evaluating the crack penetration capacity of asphalt according to one specific embodiment of the utility model;
[0022] Figure 5 It is a part of the sectional structure principle schematic view of a testing device for evaluating the crack penetration capacity of asphalt according to one specific embodiment of the utility model; Figure 4
[0023] It is a part of the sectional structure principle schematic view of a testing device for evaluating the crack penetration capacity of asphalt according to one specific embodiment of the utility model;Figure 6 Fig. 1 is a schematic diagram of a side view structure principle; Figure 4 Fig. 2 is a schematic diagram of a partial sectional view structure principle;
[0024] Figure 7 Fig. 3 is a schematic diagram of a partial sectional view structure principle; Figure 6 Fig. 4 is a schematic diagram of a partial sectional view structure principle; DETAILED DESCRIPTION
[0025] In order to have a clearer understanding of the technical features, objectives and effects of the present application, the specific embodiments of the present application will be described with reference to the drawings. In the drawings, the same components are denoted by the same reference numerals.
[0026] Figure 1 Fig. 1 is a schematic diagram of a side view structure principle; Figure 1 The present application provides a testing device for evaluating the penetration ability of asphalt cracks, which comprises a first panel 1 and a second panel 2 arranged in parallel.
[0027] The gap between the first panel 1 and the second panel 2 is used to simulate the crack of the road surface. The crack width of the actual highway surface is usually 1mm-20mm. The present application is mainly used for detecting the flow performance of asphalt in the gap under the action of its own gravity. Therefore, the inventors' team selected two sizes of 3mm and 5mm, which are relatively easy to operate and typical in the expansion cracks of the road surface, as the direct gap size of the first panel 1 and the second panel 2, that is, the gap size between the first panel 1 and the second panel 2.
[0028] That is, in a specific embodiment, the gap between the first panel 1 and the second panel 2 can be 3mm or 5mm.
[0029] The planar size of the first panel 1 and the second panel 2 can be 10-12cm in length and 8-10cm in height. In this way, there is enough length of asphalt coverage.
[0030] In order to facilitate observation, the first panel 1 can be a glass plate. In order to ensure the structural strength, the first panel 1 can be selected to be a glass plate with a thickness greater than 8mm.
[0031] Similarly, the second panel 2 can also be a glass plate, but in order to simulate the irregular side wall surface in the real road surface crack, the second panel 2 can also be made of clay or yellow clay, and the thickness can be 15-25mm. In this way, during the drying and forming process, the inner wall surface of the second panel 2 (that is, the side surface facing the first panel 1) can form several fine cracks, thereby better simulating the actual road surface crack.
[0032] Of course, the first panel 1 can also be made of clay or yellow clay, and the thickness is also 15-25 mm. In this way, the real road crack situation can be better simulated, but the disadvantage is that the second panel 2 must be destroyed at the end of the test to detect the distance between the lowest point of the asphalt and the top surface of the first panel 1.
[0033] Referring to Figure 1 As shown, the first panel 1 and the second panel 2 can be fixedly connected by bolts, which has the advantages of ensuring the stability of the connection and better ensuring the interval distance. Of course, in order to more accurately control the interval distance, a plurality of metal rods with a diameter of 3mm or 5mm (not shown in the figure) or at least a pair of rectangular metal rods with a side length of 3mm or 5mm (not shown in the figure) can be arranged at the gap edge between the first panel 1 and the second panel 2 to accurately limit the position.
[0034] In a specific embodiment, the inventor team processes 8 metal rods with a rectangular cross section, a cross-sectional size of 3*5mm and a length of 20mm to meet the laboratory 3mm gap test and 5mm gap test requirements. Usually, only 4 metal rods are needed to more accurately control the gap between the first panel 1 and the second panel 2 in a single test.
[0035] Figure 2 For Figure 1 The second panel of an improved embodiment on the basis of a three-dimensional structure principle schematic view; Figure 3 For Figure 2 The partial cross-sectional structure principle schematic view. Referring to Figure 2 And Figure 3 As shown, in order to better simulate the situation inside the real road crack, a plurality of inner grooves 211 can be added to the inner wall surface 21 of the second panel 2', for example, the inner grooves 211 can be right-angled triangular grooves with a depth L of 1-2mm and an angle α of 50-60 degrees. The distance H1 between the uppermost inner groove 211 and the top surface of the second panel 2' is not less than 10mm, so that enough asphalt can flow into the gap between the first panel 1 and the second panel 2'.
[0036] The use method of the test device for evaluating the asphalt crack penetration capacity provided by the utility model can include the following steps,
[0037] Step 1, place the test device 100 in a 50℃ oven for 2-3 hours.
[0038] The test device 100 is placed in a 50°C oven for 2-3 hours to ensure the dryness of the first panel 1 and the second panel 2. In actual construction, hot air is usually used to blow away debris from road surface cracks and dry the moisture in the cracks. Therefore, baking the test device 100 is beneficial to simulating the real construction environment.
[0039] Step 2: Take 100ml of asphalt and heat it to 180℃. Take the test device 100 from the oven in Step 1 and place it vertically. Slowly pour the asphalt between the first panel 1 and the second panel 2, in a gap of about 5cm-6cm in the middle.
[0040] During the experiment, a metal container filled with hot asphalt can be held in a clamp and moved back and forth above the gap of about 5-6 cm in the middle between the first panel 1 and the second panel 2. The hot asphalt can be slowly poured into the gap, which can simulate the spraying or pouring operation during actual construction.
[0041] Normally, hot asphalt loses its fluidity within 2 minutes at room temperature. During this process, when the asphalt deposits beyond the top of the first panel 1 and the second panel 2 and stops flowing downwards, stop and wait to see if the asphalt continues to drip into the gap. If the deposit remains, it means that the asphalt in the gap has stopped flowing downwards. If the deposit disappears, you can continue pouring asphalt until the asphalt in the container loses its fluidity.
[0042] This operation requires a high level of skill from the operator and is quite taxing on the eyes and mind.
[0043] Figure 4 This is a three-dimensional structural principle diagram of a funnel device according to a specific embodiment of the present invention; Figure 5 for Figure 4 A schematic diagram of the main view structure principle; Figure 6 for Figure 4 A schematic diagram of the side view structure principle; Figure 7 for Figure 6 A schematic diagram of the partial cross-sectional structure. See also: Figures 4 to 7 As shown, in order to improve the efficiency of the experiment, the inventors provided a funnel device 200, which includes a base portion 3 for placing on the first panel 1 and the second panel 2, a storage portion 4 connected above the base portion 3, and a holding portion 5 connected on both sides of the storage portion 4.
[0044] The funnel device 200 can be made of a metal plate (e.g. galvanized sheet or stainless steel plate) with a thickness of 2-3 mm, the length L1 of the funnel device 200 can be 6 cm, the height H of the base portion 3 can be 15 mm, and the width W of the hollow gap of the base portion 3 can be 2-3 mm larger than the gap size between the first panel 1 and the second panel 2, so as to ensure the alignment coverage of the gap between the first panel 1 and the second panel 2, for example, when the gap size between the first panel 1 and the second panel 2 is 3 mm, the width W of the hollow gap of the base portion 3 can be 5-6 mm, and when the gap size between the first panel 1 and the second panel 2 is 5 mm, the width W of the hollow gap of the base portion 3 can be 7-8 mm.
[0045] In the test, the funnel device 200 can also be placed in a 50°C oven for heat preservation for about 20 minutes, then after the test device 100 of step 1 is taken out of the oven and placed vertically, one person can place the funnel device 200 on the test device 100 by wrapping the holding portion 5 with a towel, and ensure that the hollow gap of the base portion 3 covers the gap between the first panel 1 and the second panel 2, then another person can pour all the hot asphalt into the storage portion 4, so as to wait for the asphalt to flow to the gap between the first panel 1 and the second panel 2 under the action of gravity. In this way, after the asphalt starts to flow, the person holding the funnel device 200 does not have to exert special force, and only needs to basically stabilize the funnel device 200. In this way, the difficulty of the test operation is greatly reduced.
[0046] Step 3: After the asphalt completely solidifies, the distance between the lowest point of the asphalt between the first panel 1 and the second panel 2 and the top surface of the first panel 1 is observed, and the greater the distance, the better the crack penetration ability of the asphalt.
[0047] When the first panel 1 is a glass panel, the distance between the lowest point of the solidified asphalt and the top surface of the first panel 1 can be directly measured through the first panel 1, and of course, the first panel 1 can also be directly marked with a scale, so that the distance data between the lowest point of the solidified asphalt and the top surface of the first panel 1 can be more easily and intuitively obtained.
[0048] In this case, when the inventors' team used No. 70 base asphalt for testing, the average distance data of three measurements was 3.4 cm. When the second panel 2' adopts the structure as shown in Figure 2 and Figure 3 , the average distance data of three measurements was 3.1 cm.
[0049] When the first panel 1 and the second panel 2 are also made of clay or yellow clay, the second panel 2 must be destroyed in order to measure the distance between the lowest point of the asphalt and the top surface of the first panel 1.
[0050] In this case, the inventors' team, when using a 70 matrix asphalt for the tests, obtained an average distance data of 2.9 cm for three measurements. When the first panel 1 and the second panel 2' are both made of the structure as Figure 2 and Figure 3 , the average distance data for three measurements is 2.5 cm.
[0051] Therefore, the test data of the above-mentioned 70 matrix asphalt can be used as a comparison parameter to compare the distance data of different asphalt products, so as to evaluate the crack penetration ability of the asphalt product.
[0052] When the funnel device 200 is used in step 2, considering that the hot asphalt has substantially no flowability within 2 minutes, when the asphalt in the storage part 4 presents a gel state, a knife can be used to cut the asphalt below the funnel device 200 along the top surface of the first panel 1, so as to take down the funnel device 200, at this time, it is also convenient to pick out the excess asphalt and clean the funnel device 200.
[0053] The test device for evaluating the crack penetration ability of asphalt provided by the utility model can more intuitively evaluate the crack penetration ability of the asphalt product, so as to provide an intuitive and convenient evaluation method for one of the performance parameters of the asphalt product used for maintaining the pavement crack part.
[0054] Those skilled in the art should understand that, although the utility model is described in the manner of multiple embodiments, not every embodiment only contains one independent technical solution. The description in the specification is only for the sake of clarity, those skilled in the art should understand the specification as a whole and understand the technical solutions involved in each embodiment as being combined into different embodiments to understand the protection scope of the utility model.
[0055] The above-mentioned is only the specific embodiment of the utility model, and is not used to limit the range of the utility model. Any equivalent changes, modifications and combinations made by those skilled in the art without departing from the concept and principle of the utility model should belong to the protection range of the utility model.
Claims
1. A test device for evaluating the crack penetration ability of asphalt, characterized by, It comprises a first panel and a second panel fixed in parallel, the inner wall surface of the second panel is provided with several inner grooves, the inner grooves are straight angle triangle grooves with a depth L of 1-2mm and an angle α of 50-60 degrees, the distance H1 from the uppermost inner groove to the top surface of the second panel is not less than 10mm.
2. The test device for evaluating the crack penetration ability of asphalt according to claim 1, wherein The distance between the first panel and the second panel is 3mm or 5mm.
3. The test device for evaluating the crack penetration ability of asphalt according to claim 1, wherein The planar size of the first panel and the second panel is a length of 10-12cm and a height of 8-10cm.
4. The test device for evaluating the crack penetration ability of asphalt according to claim 1, wherein The first panel is a glass plate.
5. The test device for evaluating the crack penetration ability of asphalt according to claim 1, wherein The second panel is made of clay or yellow clay with a thickness of 15-25mm.
6. The test device for evaluating the crack penetration ability of asphalt according to claim 5, wherein The first panel is made of clay or yellow clay with a thickness of 15-25mm.
7. The test device for evaluating asphalt crack penetration capability according to claim 1, wherein Several metal rods with a diameter of 3mm or 5mm are arranged at the gap edge between the first panel and the second panel.
8. The test device for evaluating asphalt crack penetration capability according to claim 1, wherein, The test device further comprises a funnel device, the funnel device comprises a base part for being placed on the first panel and the second panel, a storage part is connected above the base part, and holding parts are connected on both sides of the storage part.
9. The test apparatus for evaluating the crack penetration ability of asphalt according to claim 8, wherein The funnel device is made of a metal plate with a thickness of 2-3mm, the length L1 of the funnel device is 6cm, the height H of the base part is 15mm, and the width W of the hollow gap of the base part is 2-3mm larger than the gap size between the first panel and the second panel.