CN204359723U - A kind of salt suppresses freeze capability proving installation from snow-melting asphalt pavement - Google Patents

Abstract

The utility model discloses a salt self-melting snow-melting asphalt pavement inhibition freezing performance test device, which comprises a box body, a door is arranged on the front of the box body, a bracket, a temperature collection probe, an electronic thermometer, a DC power supply, an ammeter, Refrigeration system, metal positive electrode probe, metal negative electrode probe and container with top opening, display and main power switch are installed on the side of the box, the upper end of the metal positive electrode probe, the upper end of the metal negative electrode probe and temperature collection The upper ends of the probes are connected to the side of the cross bar, the temperature collection probe is connected to the input end of the electronic thermometer, the metal positive electrode probe is connected to the positive pole of the DC power supply, and the metal negative electrode probe is connected to the DC power supply via the ammeter. The negative pole is connected, and the output terminal of the ammeter and the output terminal of the electronic thermometer are connected with the input terminal of the display. The utility model can accurately measure the anti-icing performance of the salt self-melting snow asphalt pavement.

Description

A test device for anti-freezing performance of salt self-melting asphalt pavement

technical field

The utility model belongs to the technical field of highway pavement testing, and relates to a test device for inhibiting freezing performance of salt self-melting asphalt pavement.

Background technique

Snow and ice on roads in winter has always been a problem that plagues road traffic safety. It usually requires a lot of manpower and material resources to remove snow on roads, so the research on actively suppressing frozen roads began. Active anti-freezing technology is to add special admixtures to the mixture during the pavement paving process, so that the pavement has the special function of actively melting snow and deicing. One of the most typical applications of active anti-freeze technology is self-snow-thawing asphalt pavement with salt. Salt self-melting snow asphalt pavement refers to the addition of admixtures with salt as the main active ingredient in the asphalt mixture, so that the pavement itself has the function of actively melting ice and snow and resisting freezing. Salt self-snow-melting asphalt pavement is widely used because of its good ice-melting and snow-melting effect, simple construction technology and easy promotion. There are two main functions of salt self-melting snow asphalt pavement, melting the snow on the road and inhibiting the freezing of snow water on the road surface. Among them, inhibiting the freezing of snow water on the road surface is an important function. How to evaluate the performance of self-melting snow pavement in low temperature and wet environment Inhibition of the freezing effect is a key issue of research. There is no lack of exploration in this area in domestic related research. Most of the proposed methods are based on measuring the salt concentration of the solution after soaking the salt from snow-melting asphalt pavement, and indirectly evaluating its anti-freezing performance. This method is cumbersome and error-prone. larger. So far, there is no quick, intuitive and easy evaluation instrument and method.

Utility model content

The purpose of the utility model is to overcome the above-mentioned shortcomings of the prior art, and provide a halide self-snow-melting asphalt pavement anti-freezing performance test device, which can accurately measure the anti-icing performance of the halide self-snow-melting asphalt pavement.

In order to achieve the above object, the halide self-melting snow asphalt pavement anti-freezing performance test device described in the utility model includes a box body, the front of the box body is provided with a door, and a bracket, a temperature collection probe, an electronic thermometer, a DC power supply are fixed in the box body , ammeter, refrigeration system, metal positive electrode probe, metal negative electrode probe and a container with an open top, and a display and a main power switch are provided on the side of the box;

The bracket is composed of a horizontal bar and a vertical bar. One end of the vertical bar is fixed on the bottom inside the box, and one end of the horizontal bar is connected to the side of the other end of the vertical bar. The upper end of the metal positive electrode probe, the metal negative electrode probe The upper end of the temperature acquisition probe and the upper end of the temperature acquisition probe are connected to the side of the cross bar, the temperature acquisition probe is connected to the input end of the electronic thermometer, the metal positive electrode probe is connected to the positive pole of the DC power supply, and the metal negative electrode probe is connected to the positive pole of the DC power supply. The ammeter is connected to the negative pole of the DC power supply, and the output end of the ammeter and the output end of the electronic thermometer are connected to the input end of the display. The needle, the metal positive electrode probe and the metal negative electrode probe are located directly above the rutting plate specimen of the salt self-melting snow asphalt pavement to be tested.

The side of the end of the cross bar is provided with a through hole, the vertical bar passes through the through hole, and the screw passes through the side of the cross bar and contacts the vertical bar to fix the cross bar and the vertical bar.

The bottom of the box is provided with several supports.

The container is an insulating plastic box, and the internal length, width, and height of the container are 300 mm, 300 mm, and 120 mm, respectively.

The box body is made of thermal insulation material.

The utility model has the following beneficial effects:

During the testing process of the halide self-melting snow asphalt pavement inhibition freezing performance test device described in the utility model, a layer of water film is formed on the surface of the halide self-melting asphalt pavement rutting plate test piece to be tested, and the water film is used as a resistance , and then lower the temperature. When the water film is completely frozen, the temperature reaches the freezing point of the solution, and the current value approaches zero. When the current value is zero, the temperature of the water film is the freezing point. The freezing point value of the water film on the surface of the plate specimen is used to judge the icing performance of the salt self-melting snow asphalt pavement. The anti-icing performance test of self-melting snow asphalt pavement has simple structure, convenient operation and strong practicability.

Description of drawings

Fig. 1 is the structural representation of casing 1 in the utility model;

Fig. 2 is a schematic diagram of the structure inside the box body 1 of the present invention.

Among them, 1 is the cabinet, 2 is the door, 3 is the display, 4 is the main switch of the power supply, 5 is the electronic thermometer, 6 is the DC power supply, 7 is the ammeter, 8 is the temperature collection probe, 91 is the metal positive electrode probe, 92 is a metal negative electrode probe, 101 is a vertical bar, 102 is a horizontal bar, 11 is a screw, 12 is a refrigeration system, 13 is a container, 14 is a water film, and 15 is a rutting plate specimen of the salt self-melting snow asphalt pavement to be tested .

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail:

With reference to Fig. 1 and Fig. 2, the saline self-melting snow asphalt pavement suppression freezing performance testing device described in the utility model comprises box body 1, and the front of box body 1 is provided with door 2, is fixed with support, temperature acquisition probe in box body 1. Needle 8, electronic thermometer 5, DC power supply 6, ammeter 7, refrigeration system 12, metal positive electrode probe 91, metal negative electrode probe 92 and a container 13 with an open top, and a display 3 and a power supply assembly are arranged on the side of the box body 1. Switch 4; the support is made up of a cross bar 102 and a vertical bar 101, one end of the vertical bar 101 is fixed on the bottom of the inner side of the casing 1, one end of the cross bar 102 is connected with the side of the other end of the vertical bar 101, and the metal positive electrode probe The upper end of the needle 91, the upper end of the metal negative electrode probe 92 and the upper end of the temperature collection probe 8 are all connected to the side of the crossbar 102, the temperature collection probe 8 is connected to the input end of the electronic thermometer 5, and the metal positive electrode probe 8 is connected to the input end of the electronic thermometer 5. The needle 91 is connected to the positive pole of the DC power supply 6, the metal negative electrode probe 92 is connected to the negative pole of the DC power supply 6 through the ammeter 7, the output terminal of the ammeter 7 and the output terminal of the electronic thermometer 5 are connected to the input terminal of the display 3 , the saline self-melting snow asphalt pavement rutting plate test piece 15 to be tested is located in the container 13, and the temperature acquisition probe 8, the metal positive electrode probe 91 and the metal negative electrode probe 92 are all located in the saline self-melting snow asphalt to be tested Right above the pavement rutting plate specimen 15.

It should be noted that the side of the end of the cross bar 102 is provided with a through hole, the vertical bar 101 passes through the through hole, and the screw 11 passes through the side of the cross bar 102 and contacts the vertical bar 101 to connect the horizontal bar 102 and the vertical bar 102. Rod 101 is fixedly connected, and the bottom of box body 1 is provided with several bearings, and container 13 is an insulating plastic box, and the internal length, width and height of container 13 are respectively 300mm, 300mm and 120mm, and box body 1 is made by insulating material.

The concrete test process of the present utility model is:

1) Open the door 2 on the box body 1, place the rutting slab specimen 15 of the saline self-melting asphalt pavement to be tested in the container 13, and then add distilled water into the container 13, so that the water level of the distilled water is higher than the self-salted salt of the test. The upper surface of the snow-melting asphalt pavement rut plate test piece 15 is 3 mm, and it is left standing for 10 minutes, so that the salt to be tested is separated from the melted snow composition in the snow-melting asphalt pavement rut plate test piece 15, so that the salt to be tested is separated from the snow-melting asphalt road rut plate test piece. A water film 14 is formed on the upper surface of the piece 15;

2) Rotate the screw 11 to adjust the height of the crossbar 102 so that the lower end of the temperature collection probe 8, the lower end of the metal positive electrode probe 91 and the lower end of the metal negative electrode probe 92 are all in contact with the upper surface of the water film 14 , and then the cross bar 102 is fixed on the vertical bar 101 by screws 11, and then the door 2 on the box body 1 is closed;

3) Turn on the main power switch 4 to make the refrigeration system 12 work normally, and then the temperature in the casing 1 is reduced, and the electronic thermometer 5 collects the temperature information of the water film 14 in real time through the temperature acquisition probe 8, and displays the temperature information of the water film 14 through the display 3. Describe temperature information, ammeter 7 gathers the current information of place loop simultaneously, and described current information is displayed on the display 3;

4) As the temperature in the box body 1 drops, the water film 14 gradually cools down, and starts to freeze when its temperature drops to freezing point. Observe the current information and temperature information displayed in the display 3. When the current value is zero and within the preset time When both are within the preset range, record the temperature value at that moment, the temperature value is the freezing point temperature of the water film 14, and then obtain the anti-icing performance of the salt self-melting snow asphalt pavement according to the freezing point temperature of the water film 14, The lower the freezing point, the better the anti-icing performance of the salt self-melting snow asphalt pavement;

5) Turn off the main switch 4 of the power supply, open the door 2 on the box body 1, let it stand until the ice surface melts, take out the rut plate test piece 15 of the asphalt pavement rutting plate of the salt compound to be tested, and close the door 2 on the box body 1.

Claims (5)

1. A halide self-melting snow asphalt pavement inhibition freezing performance test device is characterized in that it comprises a casing (1), the front of the casing (1) is provided with a door (2), and a bracket is fixed in the casing (1) , temperature acquisition probe (8), electronic thermometer (5), DC power supply (6), ammeter (7), refrigeration system (12), metal positive electrode probe (91), metal negative electrode probe (92) and A container (13) with an open top, a display (3) and a main power switch (4) are provided on the side of the box (1); Described support is made up of cross bar (102) and vertical bar (101), and one end of vertical bar (101) is fixed on the bottom inside casing (1), and one end of horizontal bar (102) and vertical bar (101) other end The upper end of the metal positive electrode probe (91), the upper end of the metal negative electrode probe (92) and the upper end of the temperature acquisition probe (8) are all connected to the side of the cross bar (102), and the temperature acquisition The probe (8) is connected to the input end of the electronic thermometer (5), the metal positive electrode probe (91) is connected to the positive pole of the DC power supply (6), and the metal negative electrode probe (92) is connected to the The negative pole of the DC power supply (6) is connected, the output end of the ammeter (7) and the output end of the electronic thermometer (5) are connected with the input end of the display (3), and the saline self-melting asphalt pavement rutting plate specimen to be tested is (15) is located in the container (13), and the temperature acquisition probe (8), the metal positive electrode probe (91) and the metal negative electrode probe (92) are all located on the rutting plate of the asphalt pavement of the salinity to be measured directly above the specimen (15). 2. salt compound self-melting snow asphalt pavement inhibition freezing performance testing device according to claim 1, is characterized in that, the side of cross bar (102) end is provided with through hole, and vertical bar (101) passes through described through hole , the screw (11) passes through the side of the cross bar (102) and contacts the vertical bar (101) to securely connect the cross bar (102) and the vertical bar (101). 3. The halide self-melting snow asphalt pavement anti-freezing performance test device according to claim 1, characterized in that, the bottom of the box (1) is provided with several supports. 4. the halide self-melting snow asphalt pavement inhibition freezing performance testing device according to claim 1, is characterized in that, described container (13) is an insulating plastic box, and the internal length, width and height of container (13) are respectively 300mm, 300mm and 120mm. 5. The halide self-melting snow asphalt pavement inhibition freezing performance testing device according to claim 1, characterized in that, the box body (1) is made of an insulating material.