CN110618053A - Method for evaluating release amount of salt in salt snow-melting coating - Google Patents

Abstract

The invention discloses a method for evaluating the release amount of salts in a salted snow-melting coating, which belongs to the field of performance testing of the salted snow-melting coating. The evaluation method of the present invention includes the following steps: 1) immersing the silicone rubber sheet containing the salinized snow-melting coating in the soaking liquid of preset quality, and collecting the soaking liquid after soaking for a preset time; testing the salinity ions in the soaking liquid 2) Repeat step ₁ ) until the content of salt ions in the soaking solution no longer changes; 3) Separate the halide snow-melting coating from the silicone rubber sheet , incinerate the separated salinized snow-melting coating; soak the incineration residue of the salinized snow-melting coating in the soaking solution, and convert the release amount of the salinized compound and record it as m _residue ; 4) Take the cumulative release amount as a percentage of the total is the ordinate, and the soaking time is the abscissa. The curve of the release amount of salts in the salt-melting snow-melting coating with time is obtained by fitting the data.

Description

A method for evaluating the release of salts in salt-melting coatings

technical field

The invention belongs to the field of performance testing of a salinized snow-melting coating, in particular to a method for evaluating the release amount of a salinized snow-melting coating.

Background technique

At present, the most used methods for removing ice and snow include passive snow removal technologies such as mechanical snow removal and snow removal by spreading snow melting agents. This kind of technology cannot maintain the road safety effect for a long time, and cannot do anything about the dark ice layer on the road that may appear at any time. Salt-based snow-melting coating is an active road ice and snow removal technology. It is a thin layer of coating with snow-melting and ice-melting function on the road surface. This coating contains salt-based snow-melting substances. Under the pressure, the salts in the coating are released to melt the ice and snow on the road and restore the anti-skid performance of the road. The ice and snow melting effect of this technology has been confirmed through many physical projects.

However, in the process of use, it was found that with the erosion of rain and snow, the salts in the coating were continuously precipitated, and the snow-melting effect and snow-melting life of the salt-melting coating could not be accurately predicted. At present, there is no test method for the change of the salinity release amount of the salinized snow melting coating with time under rain and snow conditions. big.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the shortcomings of tracking and observing the snow melting effect of a physical project to estimate that its snow melting capacity is limited by conditions and greatly influenced by human factors, and provides a method for evaluating the amount of salt released in a salt snow melting coating.

To achieve the above object, the present invention adopts the following technical solutions to realize:

A method for evaluating the release amount of salts in a salt-melting coating, comprising the following steps:

A method for evaluating the release amount of salts in a salted snow-melting coating, comprising the following steps:

1) Soak the silicone rubber sheet containing the salinized snow melting coating in the soaking liquid of preset quality, and collect the soaking liquid after soaking for a preset time;

Test the content of salt ions in the collected soaking solution, and convert it into the release amount of salt, and obtain the first test data, which is recorded as m ₁ ;

2) immersing the silicone rubber sheet containing the salinized snow-melting coating in the previous step into another soaking solution of preset quality, repeating the soaking, collecting and testing operations in step 1) to obtain the second test data, Denoted as m ₂ ;

3) Repeat step 2) until the adjacent two test data no longer change;

Among them, the test data of the nth time is denoted as m _n ;

4) separate the salinized snow-melting coating from the silicone rubber plate, and incinerate the separated salinized snow-melting coating to ashes;

Soak the ash in another preset quality soaking solution, filter and collect the filtrate, repeat the collection and testing operations of step 1), and obtain the release amount of the salt compound in the residue of the salt compound snow melting coating, denoted as m _residual ;

5) Taking the percentage of the cumulative release amount to the total amount as the ordinate, and the soaking time as the abscissa, using the data to fit the curve of the change of the release amount of the salt compound in the salt compound snow melting coating with time;

where the total amount is equal to m ₁ +m _{2 +} ...+mn...+ _mresidue .

Further, the manufacturing method of the silicone rubber containing the salted snow melting coating is as follows:

The salted snow-melting coating mixture is painted onto a silicone rubber plate and cured, and the salted snow-melting coating is sealed around it with paraffin to obtain a silicone rubber sheet containing the salted snow-melting coating.

Further, the weight of the salted snow melting coating per square meter of the silicone rubber plate is 0.5-2 kg.

Further, the preset quality of the soaking liquid in steps 1)-5) is m _{soaking liquid} , m _{soaking liquid} =S×49.9kg/m ⁻² ; wherein, S is the area of the salinized snow melting coating.

Further, the temperature of the soaking liquid in steps 1)-5) is all 1-5°C, and the preset time of soaking is all 24h.

Further, during the soaking process, the soaking liquid is in a closed environment.

Further, during the soaking process, the soaking solution was shaken every 3 hours.

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

The method for evaluating the release amount of salts in the salted snow-melting coating provided by the invention simulates the release process of the salted snow-melting coating under the scouring of many rains and snows in winter, and can accurately measure the salted snow-melting coating under different spreading amounts. The sustainable release time of the salinized compound can predict the snow melting durability of the salinized snow melting coating. On the other hand, it can accurately measure the release amount of the salinized compound in each snowfall. To predict the snow melting effect of the salinized snow melting coating, the method is simple to operate, and the data is accurate and reliable.

Further, the preset quality of the soaking liquid is set, 49.9kg/m ^-2 is the maximum amount of soaking liquid that can be collected per unit area of road surface within 24 hours during heavy rain, and the quality of the soaking liquid is set to be within the area of the salt coating. The maximum amount of immersion liquid that can be collected by the pavement during heavy rain fully considers the dissolution and scour effect of rainfall on the salinity in the coating.

Further, the temperature of the soaking liquid is 1 to 5°C, and the preset soaking time is 24 hours, so that the temperature of the soaking liquid is as close as possible to the temperature of rain and snow in winter, and the solubility of salts is also closer to that of the soaking liquid in winter. At the same time, according to the amount of soaking liquid collected for 24h of rainfall as the standard, the preset soaking time is set as 24h.

Further, during the soaking process, the soaking liquid is in a closed environment to prevent evaporation and make the test results more accurate.

Further, during the soaking process, the soaking solution was shaken every 3 hours to fully dissolve the salts in the coating in the soaking solution.

Description of drawings

Fig. 1 is the structural representation of embodiment 1;

FIG. 2 is a graph of test results using the device of Example 1. FIG.

Among them: 1- plastic wrap; 2- beaker; 3- soaking liquid; 4- salted snow melting coating; 5- silicone rubber plate.

Detailed ways

In order to make those skilled in the art better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only Embodiments are part of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that the terms "first", "second" and the like in the description and claims of the present invention and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used may be interchanged under appropriate circumstances such that the embodiments of the invention described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having", and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those expressly listed Rather, those steps or units may include other steps or units not expressly listed or inherent to these processes, methods, products or devices.

Below in conjunction with accompanying drawing, the present invention is described in further detail:

Referring to FIG. 1, FIG. 1 is a schematic structural diagram of Example 1; the salted snow melting coating 4 is provided on the silicone rubber plate 5, and the two are placed in a beaker 2, and a soaking liquid 3 exists in the beaker 2. During the soaking process, the beaker 2 is sealed by plastic wrap 1.

The evaluation process utilizing Example 1 is:

1) 7.85g of salt-based snow-melting coating 4 mixture was painted on a circular silicone rubber plate 5 with a diameter of 10 cm according to 1kg/m ² coating amount, and cured at normal temperature, and the snow-melting coating was sealed around with paraffin;

2) Soak the silicone rubber sheet coated with the salted snow melting coating in a beaker 2 containing 391.7 g of deionized water, seal the beaker with plastic wrap and place it in a low temperature incubator at 3°C, shake it every 3 hours A beaker, after soaking for 24 hours, take out the salinized snow-melting coating and dry it, collect the soaking liquid, use the ion chromatograph to test the content of the salinized ions in the soaking liquid, and convert it into the release amount of the salted compound, denoted as m ₁ ;

2) Immerse the silicone rubber sheet containing the salinized snow-melting coating in the previous step into 391.7 g of deionized water, repeat the immersion, collection and testing operations in step 1) to obtain the second test data, denoted as m ₂ ;

3) Repeat step 2) until the adjacent two test data no longer change;

Among them, the test data of the nth time is denoted as m _n ;

5) Peel off the salted snow-melting coating from the silicone rubber plate and cut it into pieces, place the fragments of the salted snow-melting coating in a crucible, and incinerate it in a muffle furnace at 800°C for 3 hours; use 391.7g of deionized water Soak the salinized snow-melting coating incineration ash, filter and collect the filtrate, use an ion chromatograph to test the content of salinized ions in the filtrate, convert it into the released amount of salinized compounds and record it as m _residue .

5) The percentage of the release of salts in the salinized snow-melting coating to the total is: wt%=m _n /(m ₁ +m ₂ +….+m _residue )×100%, and the cumulative release is the total The percentage of the amount is on the ordinate, and the soaking time is on the abscissa. Using the data fitting method, the curve of the release of the salt in the salt-melting coating with time is made.

Referring to Fig. 2, Fig. 2 is a graph of the test results using the device of Example 1. It can be seen from Fig. 2 that the release amount-time curve of the salinized snow melting coating conforms to the linear equation y=-10.1652+7.5934x, where the correlation coefficient R ² is 0.9885. The results show that the sustainable release time of 1kg/m ² of the salted snowmelt coating under heavy rain erosion is 12 days.

The above content is only to illustrate the technical idea of the present invention, and cannot limit the protection scope of the present invention. Any modification made on the basis of the technical solution proposed in accordance with the technical idea of the present invention falls within the scope of the claims of the present invention. within the scope of protection.

Claims (8)

1. a method for evaluating the amount of release of salts in a salted snow-melting coating, is characterized in that, comprises the steps: 1) Soak the silicone rubber sheet containing the salinized snow melting coating in the soaking liquid of preset quality, and collect the soaking liquid after soaking for a preset time; Test the content of salt ions in the collected soaking solution, and convert it into the release amount of salt, and obtain the first test data, which is recorded as m ₁ ; 2) immersing the silicone rubber sheet containing the salinized snow-melting coating in the previous step into another soaking solution of preset quality, repeating the soaking, collecting and testing operations in step 1) to obtain the second test data, Denoted as m ₂ ; 3) Repeat step 2) until the adjacent two test data no longer change; Among them, the test data of the nth time is denoted as m _n ; 4) separate the salinized snow-melting coating from the silicone rubber plate, and incinerate the separated salinized snow-melting coating to ashes; Soak the ash in another soaking solution of preset quality, filter and collect the filtrate, repeat the soaking, collecting and testing operations in step 1) to obtain the release amount of the salt in the residue of the salt-melting snow coating, denoted as: is m _residual ; 5) Taking the percentage of the cumulative release amount to the total amount as the ordinate, and the soaking time as the abscissa, using the data to fit the curve of the change of the release amount of the salt compound in the salt compound snow melting coating with time; where the total amount is equal to m ₁ +m _{2 +} ...+mn...+ _mresidue . 2. the evaluation method of salt release amount in the salt compound snow melting coating according to claim 1 is characterized in that, the manufacture method of the silicone rubber containing the salt compound snow melting coating is as follows: The salted snow-melting coating mixture is painted onto a silicone rubber plate and cured, and the salted snow-melting coating is sealed around it with paraffin to obtain a silicone rubber sheet containing the salted snow-melting coating. 3 . The method for evaluating the amount of salt released from the salt-based snow-melting coating according to claim 1 , wherein the weight of the salt-based snow-melting coating per square meter of the silicone rubber plate is 0.5-2 kg. 4 . 4. the evaluation method of salt release amount in the salt melt snow coating according to claim 1, is characterized in that, the preset quality of soaking liquid in step 1)-5) is m _{soaking liquid} , m _{soaking liquid} = S×49.9 kg/m ⁻² ; wherein, S is the area of the salinized snow melting coating. 5 . The method for evaluating the release amount of salts in the salt-melting coating according to claim 1 , wherein the content of the salts in the soaking solution is measured by an ion chromatograph. 6 . 6. The method for evaluating the release amount of salts in the salt-based snow melting coating according to claim 1, wherein the temperature of the soaking liquid in steps 1) to 5) is 1 to 5°C, and the soaking preset The time is 24h. 7 . The method for evaluating the release amount of salts in the salt-melting coating according to claim 1 , wherein, in the soaking process, the soaking liquid is in a closed environment. 8 . 8 . The method for evaluating the amount of release of salts in the salt-melting coating according to claim 1 , wherein in the soaking process, the soaking liquid is shaken once every 3h. 9 .