CN114149788A - Slow-release ice and snow melting agent, preparation method thereof and thin-layer cover material containing slow-release ice and snow melting agent - Google Patents
Slow-release ice and snow melting agent, preparation method thereof and thin-layer cover material containing slow-release ice and snow melting agent Download PDFInfo
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- CN114149788A CN114149788A CN202111641936.9A CN202111641936A CN114149788A CN 114149788 A CN114149788 A CN 114149788A CN 202111641936 A CN202111641936 A CN 202111641936A CN 114149788 A CN114149788 A CN 114149788A
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- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 claims description 10
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- 235000010333 potassium nitrate Nutrition 0.000 claims description 6
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- 239000002994 raw material Substances 0.000 claims description 5
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Images
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/18—Materials not provided for elsewhere for application to surfaces to minimize adherence of ice, mist or water thereto; Thawing or antifreeze materials for application to surfaces
- C09K3/185—Thawing materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/26—Bituminous materials, e.g. tar, pitch
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Ceramic Engineering (AREA)
- Combustion & Propulsion (AREA)
- Structural Engineering (AREA)
- Materials Applied To Surfaces To Minimize Adherence Of Mist Or Water (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a slow-release ice and snow melting agent, a preparation method thereof and a thin-layer cover material containing the slow-release ice and snow melting agent. The ice and snow melting agent comprises an ice and snow melting salt core material adsorbing material and a surface high-molecular polymer wrapping material; wherein the core material comprises inorganic snow melting salt, a carrier-wrapped adsorption material, a surface modification material, a hydrophobic agent, a corrosion inhibitor, a plant growth promoter and temperature-sensitive hydrogel; the wrapping material comprises polystyrene, polyvinyl chloride, polypropylene or methyl acrylate. Adding an inorganic salt saturated solution into a carrier-coated adsorbing material, drying, adding an organic solvent of a polymer surface coating material to prepare a filler, adding other substances except the temperature-sensitive hydrogel in a core material, and finally coating the temperature-sensitive hydrogel; the thin-layer cover material comprises an ice and snow melting agent, emulsified asphalt, water-based epoxy resin, basalt aggregate and limestone mineral powder. The ice and snow melting agent can realize the effect of sealing and preventing the salt loss in non-applicable seasons, and has a good snow melting effect.
Description
Technical Field
The invention belongs to the field of road engineering and pavement maintenance engineering, and particularly relates to a slow-release ice and snow melting agent, a preparation method thereof and a thin-layer cover material containing the slow-release ice and snow melting agent.
Background
In winter, the accumulated snow on the road surface is frozen, which not only influences the traffic and transportation capacity of the road, but also threatens the safety of vehicles and pedestrians. The traditional manual salt spreading and mechanical snow removing are time-consuming and labor-consuming, and can pollute the environment and damage roads. In order to solve the problem, the slow-release salt-storage self-melting snow technology is increasingly paid attention by scientific researchers and traffic departments in various countries around the world. The principle is that the snow-melting ice-suppressing material replaces part of filler or fine aggregate in the asphalt concrete, or the snow-melting ice-suppressing material is added into emulsified asphalt and coated on the surface of the pavement in the form of a coating. When snowing, the salt compounds in the deep layer of the road surface can be released under the action of the pump suction, the osmotic pressure and the capillary of the vehicle load, and the salt compounds can rise to the road surface, thereby achieving better ice and snow melting effect.
However, the existing slow-release ice and snow melting road surface mainly adopts full-thickness road surfaces such as AC-13, SMA-13 and the like, and the slow-release ice and snow melting road surface has large consumption of salt substances during construction and high total manufacturing cost. When snowing, the salinization substance at the lower layer of the pavement layer can not be released, thereby not only reaching the preset effect, but also causing the waste of materials and further causing adverse effect on the durability of the pavement. Meanwhile, after the asphalt pavement is built for several years, the problems of poor skid resistance, high noise, poor flatness and the like of the pavement are caused by the abrasion of tires on part of the pavement.
The thin overlay is an asphalt pavement surface layer with the thickness of 2cm-4cm, and due to good skid resistance, noise reduction and rutting resistance, the thin overlay can remarkably improve the skid resistance of the asphalt pavement surface layer, repair slight rutting, cracks and other diseases, greatly prolong the service life of the asphalt pavement and reduce the maintenance cost.
Therefore, a snow-melting agent which is seasonal, has a good snow-melting effect, is low in corrosion degree and is simple in preparation method is needed.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a slow-release ice and snow melting agent which can realize normal salt seepage under the condition of low-temperature ice and snow and can prevent salt loss by sealing the pores on the surface of a filler under the condition of high-temperature rainy season;
the invention also aims to provide a preparation method of the high-performance slow-release ice and snow melting agent;
the invention also provides a thin-layer cover material containing the slow-release ice and snow melting agent.
The technical scheme is as follows: the slow-release ice and snow melting agent comprises an ice and snow melting salt core material adsorption material and a surface high-molecular polymer wrapping material; the ice and snow melting salt core material adsorbing material comprises, by weight, 40-100 parts of inorganic ice and snow melting salt, 20-50 parts of a carrier-coated adsorbing material, 10-50 parts of a surface modification material, 2-10 parts of a hydrophobizing agent, 2-10 parts of a corrosion inhibitor, 1-5 parts of a plant growth promoter and 1-5 parts of temperature sensitive hydrogel; the high molecular polymer wrapping material comprises 10-15 parts of polystyrene, 5-10 parts of polyvinyl chloride, 1-5 parts of polypropylene or 5-10 parts of methyl acrylate.
The ice and snow melting agent is compounded by adopting a unique carrier-coated adsorption material, a surface modification material and a temperature sensitive hydrogel high polymer coating material, so that the carrier-coated adsorption material fully adsorbs inorganic snow melting salt, and then is coated and modified by the high polymer coating material, and a thermal shrinkage temperature sensitive hydrogel material is grafted onto a high polymer coating of a salt storage carrier, so that the carrier-coated adsorption material is formed to adsorb the inorganic snow melting salt, the high polymer polymerization material comprises the carrier-coated adsorption material, the high polymer polymerization material comprises a layer-by-layer coating structure of the thermal sensitive hydrogel material grafted on the material, and the hydrophobic material is combined, so that the ice and snow melting agent has a slow release function, and the seepage of internal salt is controlled by the swelling and shrinking characteristics of the temperature sensitive hydrogel under different temperature conditions, and the normal seepage of salt under the ice and snow conditions at low temperature is realized, under the condition of high temperature and rainy season, the surface pores of the filler are sealed to prevent the salt loss, so that the slow-release salt-storage ice-snow melting filler has intelligence.
Furthermore, the inorganic snow melting salt of the snow melting agent at least comprises one of sodium acetate, potassium acetate, calcium acetate or calcium acetate.
Furthermore, the carrier-coated adsorption material of the ice and snow melting agent at least comprises bamboo powder, zeolite, volcanic rock, modified volcanic rock, wood powder or nano SiO2One kind of (1).
Further, the surface modification material of the ice and snow melting agent can comprise span, a silane coupling agent or an aluminate coupling agent.
Furthermore, the water repellent of the ice and snow melting agent can comprise organosilicon rubber emulsion or polytetrafluoroethylene emulsion.
Furthermore, the temperature-sensitive hydrogel of the ice and snow melting agent can comprise acrylamides and benzophenone accounting for 1/3-1/4 parts by weight of the acrylamide, wherein the acrylamides comprise poly-isopropyl acrylamide, tert-butyl acrylamide or sec-butyl acrylamide.
Furthermore, the corrosion inhibitor of the ice and snow melting agent can comprise sodium dihydrogen phosphate, sodium silicate, sodium tripolyphosphate, sodium tetraborate or thiourea.
Furthermore, the plant growth promoter of the ice and snow melting agent can comprise urea or potassium nitrate.
The method for preparing the sustained-release ice and snow melting agent comprises the following steps:
(1) preparing saturated solution of inorganic snow-melting salt, heating the saturated solution and a carrier-coated adsorbing material in water bath and stirring to prepare saturated emulsion of the carrier-adsorbed inorganic salt, drying, adding the saturated emulsion into an organic solution of a high-molecular surface polymer coating material, and stirring, centrifugally separating and cleaning to prepare a salt storage filler adsorbed by the carrier;
(2) drying the salt storage filler adsorbed by the carrier in the step, adding absolute ethyl alcohol for ultrasonic dispersion, stirring, adding the surface modification material, the hydrophobing agent, the corrosion inhibitor and the plant growth promoter, performing centrifugal separation, and cleaning to obtain a mixture;
(3) and (3) dissolving the temperature-sensitive hydrogel in absolute ethyl alcohol, adding the mixture prepared in the step (2), heating and reacting for 0.5-2h at 40-60 ℃, irradiating for 0.5-3h by ultraviolet light under the condition of inert gas, washing, and drying to obtain the temperature-sensitive slow-release salt-storage ice-snow melting filler.
The invention carries out ultraviolet irradiation under the condition of inert gas, can induce the generation of the reaction of grafting the thermal shrinkage temperature-sensitive hydrogel material to the polymer envelope of the salt storage carrier, and improves the reaction efficiency.
The thin-layer cover material comprises the following raw materials in parts by weight: 3-10 parts of the slow-release ice and snow melting agent, 2-10 parts of emulsified asphalt, 1-10 parts of waterborne epoxy resin, 60-90 parts of basalt aggregate and 2-8 parts of limestone mineral powder.
Has the advantages that: compared with the prior art, the invention has the following remarkable advantages: the ice and snow melting agent can realize the effects of normally seeping out salt under the condition of low temperature ice and snow and preventing salt loss due to the closed pores on the surface of the filler under the condition of high temperature rainy season, so that the slow-release salt-storage ice and snow melting filler has intelligence, and the problem of raw material waste caused by the large precipitation of the existing slow-release salt-storage filler under the condition of high temperature rainy season is effectively solved; meanwhile, a structure of wrapping the raw materials layer by layer is formed during preparation, so that the ice-snow melting agent has slow release and release performance, and the service life of a thin-layer cover material prepared by the slow release ice-snow melting agent is prolonged.
Drawings
FIG. 1 is a schematic structural principle diagram of the invention adopting a thin-layer cover material of a slow-release ice and snow melting agent laid on a road surface;
fig. 2 is a graph of conductivity versus time for a thin layer of an overcoat material in a soaked state.
Detailed Description
The technical solution of the present invention will be further described in detail with reference to the following embodiments and the accompanying drawings.
The starting materials of the present invention are commercially available. The hydrophobic agent employed in the present invention may comprise a silicone rubber emulsion or a polytetrafluoroethylene emulsion. Wherein, the organic silicon rubber emulsion is prepared by uniformly dispersing organic silicon rubber in water by a two-step emulsification method of combining a static mixer and a colloid mill and one-step mechanical emulsification, and the organic silicon rubber emulsion does not need specific concentration and is moderate. The polytetrafluoroethylene emulsion is an aqueous dispersion obtained by concentrating a dispersion obtained by polymerizing tetrafluoroethylene to a solid content of about 60% and stabilizing the dispersion with a nonionic surfactant. The organic solvent in the organic solution of the polymer coating material may be one that can sufficiently dissolve the polymer coating material, and may be, for example, styrene or perchloroethylene.
The carrier coated adsorption material adopted by the invention at least comprises bamboo powder, zeolite, volcanic rock, modified volcanic rock, wood powder or nano SiO2One kind of (1). Preferably, the carrier-coated adsorbent material can be selected from bamboo powder and volcanic rock (or zeolite, modified volcanic rock, wood powder or nano SiO)2One of the above). The invention adopts special carrier adsorption material, introduces the waste material-bamboo powder material generated in the existing bamboo processing into the preparation of the slow-release salt storage filler, is convenient for the carrier to adsorb more salt fillers through the high adsorption property of the slow-release salt storage filler, and improves the ice and snow melting effect of the pavement. The weak alkaline property of the bamboo powder can reduce the damage of the water stability of the thin-layer covering material caused by the addition of other slow-release salt storage fillers, and meanwhile, the bamboo powder has the characteristics of strong fiber bonding binding power, high buffering performance, difficulty in flying and the like, and can obviously improve the high-temperature performance and the flying-resistant performance of the thin-layer covering material.
Example 1
The components and contents of the sustained-release ice and snow melting agent of this example are shown in table 1 below.
TABLE 1 Slow-Release Ice-snow melting agent component content
| Serial number | Components | Content (wt.) |
| 1 | Sodium acetate | 55 portions of |
| 2 | |
25 portions of |
| 3 | |
5 portions of |
| 4 | |
13 portions of |
| 5 | Span-60 | 15 portions of |
| 6 | |
2 portions of |
| 7 | |
3 portions of |
| 8 | |
2 portions of |
| 9 | Tert- |
3 portions of |
| 10 | Benzophenones as |
1 part of |
The method for preparing the slow-release ice and snow melting agent comprises the following steps:
(1) preparing a saturated sodium acetate solution, stirring the saturated sodium acetate solution, volcanic rock and bamboo powder for 6 hours at a rotating speed of 400r/min under a water bath heating condition of 70 ℃ to prepare a carrier adsorption inorganic salt saturated solution, drying, adding the dried saturated sodium acetate solution into an organic solution of polystyrene, continuously stirring, and performing centrifugal separation and impurity cleaning to prepare a carrier adsorption salt storage filler;
(2) drying the salt storage filler adsorbed by the prepared carrier for 11h, adding absolute ethyl alcohol to perform ultrasonic dispersion for 1h, stirring and dropwise adding span-60, organic silicon rubber emulsion, sodium dihydrogen phosphate and urea, and performing centrifugal separation and ultrasonic cleaning to remove impurities to obtain a mixture;
(3) fully dissolving benzophenone and tert-butyl acrylamide in absolute ethyl alcohol, adding the prepared mixture, heating for 1h at 50 ℃, cooling, irradiating for 0.5h by 500w of ultraviolet light under argon atmosphere, washing by ethyl alcohol, and drying in a vacuum box at 30 ℃ to obtain the temperature-sensitive high-performance slow-release ice and snow melting agent.
The components and amounts of the thin layer cover materials prepared using the slow release ice and snow melting agent of this example are shown in table 2 below.
TABLE 2 thin layer cover material prepared by using slow-release ice and snow melting agent
| Serial number | Components | Content (wt.) |
| 1 | Slow-release ice and |
7 portions of |
| 2 | Emulsified |
7 portions of |
| 3 | |
1 part of |
| 4 | Basalt aggregate | 81 portions of |
| 5 | Limestone mineral powder | 4 portions of |
Example 2
The components and contents of the sustained-release snow-melting agent of this example are shown in table 3 below.
TABLE 3 Slow-Release Ice-snow melting agent component content
The method for preparing the slow-release ice and snow melting agent comprises the following steps:
(1) preparing a saturated potassium acetate solution, stirring the saturated potassium acetate solution, bamboo powder and volcanic rock for 6 hours at a rotating speed of 400r/min under a water bath heating condition of 70 ℃ to prepare a saturated solution of carrier adsorption inorganic salt, drying, adding the saturated solution of carrier adsorption inorganic salt into an organic solution of polystyrene, continuously stirring, and performing centrifugal separation and impurity cleaning to prepare a salt storage filler adsorbed by the carrier;
(2) drying the salt storage filler adsorbed by the prepared carrier for 11h, adding absolute ethyl alcohol to perform ultrasonic dispersion for 1h, stirring and dropwise adding span-60, organic silicon rubber emulsion, sodium tripolyphosphate and urea, and performing centrifugal separation and ultrasonic cleaning to remove impurities to obtain a mixture;
(3) fully dissolving benzophenone poly-isopropyl acrylamide in absolute ethyl alcohol, adding the prepared mixture, heating for 1h at 50 ℃, cooling, irradiating for 1h by using 500w of ultraviolet light under argon atmosphere, washing by using ethyl alcohol, and drying in a vacuum box at 30 ℃ to obtain the temperature-sensitive high-performance slow-release ice and snow melting agent.
The components and amounts of the thin layer cover materials prepared using the slow release ice and snow melting agent of this example are shown in table 4 below.
TABLE 4 thin layer overlay material prepared by using slow-release ice and snow melting agent
| Serial number | Components | Content (wt.) |
| 1 | Slow-release ice and snow melting agent | 8 portions of |
| 2 | |
7 portions of |
| 3 | |
2 portions of |
| 4 | Basalt aggregate | 78 portions of |
| 5 | |
5 portions of |
Example 3
The components and contents of the sustained-release snow-melting agent of this example are shown in table 5 below.
TABLE 5 Slow Release Ice and snow melting agent component content
| Serial number | Components | Content (wt.) |
| 1 | Sodium acetate | 30 portions of |
| 2 | Potassium acetate | 20 portions of |
| 3 | Modified volcanic rock | 28 portions of |
| 4 | |
9 portions of |
| 5 | |
3 portions of |
| 6 | Span-80 | 50 portions of |
| 7 | |
2 portions of |
| 8 | |
2 portions of |
| 9 | |
2 portions of |
| 10 | Sec-butyl acrylamide | 4 portions of |
| 11 | Benzophenones as |
1 part of |
The method for preparing the slow-release ice and snow melting agent comprises the following steps:
(1) preparing saturated solution of sodium acetate and potassium acetate, stirring the saturated solution of sodium acetate and potassium acetate, bamboo powder and modified volcanic rock for 7 hours at a rotating speed of 500r/min under the water bath heating condition of 80 ℃ to prepare saturated solution of carrier adsorption inorganic salt, drying, adding the saturated solution of carrier adsorption inorganic salt into polypropylene solution, continuously stirring, and performing centrifugal separation and impurity cleaning to prepare salt storage filler adsorbed by the carrier;
(2) drying the salt storage filler adsorbed by the prepared carrier for 12 hours, adding absolute ethyl alcohol for ultrasonic dispersion for 1 hour, simultaneously stirring and dropwise adding span-80, polytetrafluoroethylene emulsion, sodium silicate and potassium nitrate, and removing impurities through centrifugal separation and ultrasonic cleaning to obtain a mixture;
(3) fully dissolving benzophenone and sec-butyl acrylamide in absolute ethyl alcohol, adding the prepared mixture, heating for 1h at 50 ℃, cooling, irradiating for 2h by 500w of ultraviolet light under argon atmosphere, washing by ethyl alcohol, and drying in a vacuum box at 30 ℃ to obtain the temperature-sensitive high-performance slow-release ice and snow melting agent.
The composition and content of the thin layer cover material prepared using the slow release ice and snow melting agent of this example are shown in table 6 below.
TABLE 6 thin layer overlay material prepared by using slow-release ice and snow melting agent
The structure of the invention adopting the slow-release ice and snow melting agent thin-layer overlay material laid on the road surface is shown in figure 1, wherein 1 is an original asphalt concrete road surface structure layer, 2 is a thin-layer overlay, and 3 is an internal salt storage filler, so that the thin-layer overlay structure of the invention is characterized in that the salt storage filler is doped in the thin-layer overlay, can realize the self ice and snow melting function while the road surface is maintained preventively, and realizes the effect of combining the maintenance technology and the functional road surface technology.
Performance detection
1. Low temperature rain and fog experiment
The purpose of the low-temperature rain-fog icing test is to evaluate the ice and snow melting effect of the mixture surface of the high-performance slow-release ice and snow melting material in a certain low-temperature and humid environment. A low-temperature environment test box is adopted, the environment humidity (70%) is adjusted and the surface of a test piece is sprayed with water by setting a certain temperature (-5 ℃ -0 ℃), so that two working conditions of fog and rain of an actual road surface under a low-temperature condition in winter are simulated, and the ice and snow melting effect of the thin-layer cover surface added with the high-performance slow-release ice and snow melting agent and the surface of the common cover surface slow-release salt-storage asphalt concrete under different conditions is analyzed. Wherein the temperature is set to-5 ℃ under the condition that the working condition is fog, the humidity is set to 70 percent, the temperature is set to-5 ℃ under the condition that the working condition is rain, and water is sprayed on the surface of the test piece.
The experimental procedure was as follows:
(1) according to the preparation method in each embodiment, a thin-layer mat coat Marshall test piece added with a high-performance slow-release ice and snow melting agent and a common asphalt concrete Marshall test piece (as blank groups) are respectively prepared;
(2) placing the prepared test piece in a low-temperature environment test box, wherein the simulation working condition is the rain condition, the temperature in the box is set to be-5 ℃, and the humidity is set to be 70%; the working condition is rain, the temperature in the box is set to be-5 ℃, and water is sprayed on the surface of the test piece;
(3) after freezing for 5h in the box, the Marshall test piece is taken out to observe the freezing condition of the surface of the test piece.
By adding a proper amount of high-performance slow-release ice and snow melting materials (experimental group), the ice and snow melting material has a more remarkable ice melting effect compared with the ice and snow melting material without the high-performance slow-release ice and snow melting materials (blank group), and the ice and snow melting effect in winter can be achieved when the ice and snow melting material is adulterated in a preventive maintenance thin-layer cover surface structure of a road surface. The results of the experiment are shown in table 7:
TABLE 7 icing condition of low-temperature rain and fog simulation experiment test piece
| Serial number | Simulation environment (fog) | Simulation environment (rain) |
| Control group | A layer of white cream on the surface | Freezing of surfaces |
| Example 1 | Surface is substantially unchanged | Small amount of ice formation on the surface |
| Example 2 | Surface is substantially unchanged | Not frozen |
| Example 3 | Surface is substantially unchanged | Not frozen |
As can be seen from Table 7, the high-performance intelligent slow-release ice and snow melting material prepared by the invention can effectively reduce the freezing point of a pavement aqueous solution, and the freezing point range is more than or equal to-5 ℃.
2. Ice interface pull-out test
Under the condition of moderate to heavy snow, the temperature is low, the ice and snow are not just melted, the snow or the ice layer exists on the road surface of the ice and snow melting road surface, and the ice interface pull test is used for judging the effect of melting the ice and the snow of the ice and snow melting asphalt mixture by measuring the adhesive force between the snow or the ice layer and the road surface. If snow melt ice and snow bituminous mixture can reduce the adhesion force on snow or ice sheet and road surface to make road surface ice and snow clearer more easily, promote ice and snow removal operating efficiency, help highway can the quick recovery traffic under the big snow condition, reduce the interference of snowfall to the public trip. In order to evaluate the bonding performance of the ice interface and the road surface mixture, a pull-out test of the ice interface can be adopted for evaluation, so that the ice and snow melting performance of the mixture is indirectly reflected, and the specific method comprises the following steps:
(1) preparing three Marshall test pieces of the asphalt mixture doped with the high-performance slow-release ice and snow melting material of the embodiment, and demolding for later use;
(2) putting different test pieces into drawing equipment, fixing and checking, watering the drawing equipment to enable the water surface to cover the bottom of the drawing equipment, fully ensuring that the bottom of the test piece is in contact with the water surface of the drawing equipment, placing the test piece in a refrigerator at minus 10 ℃ for 24 hours, and taking out the test piece for a rapid drawing test. The test results are shown in table 8:
TABLE 8 Ice interfacial pullout Strength
| Serial number | Tensile Strength (MPa) |
| Control group | 0.41 |
| Example 1 | 0.23 |
| Example 2 | 0.19 |
| Examples3 | 0.20 |
As can be seen from table 8, after the high-performance slow-release ice and snow melting material is doped, the high-performance slow-release ice and snow melting material can enter the interface between the ice layer and the mixture, so that the freezing point can be effectively lowered, and the surface adhesion of the ice layer and the mixture is weakened. The following results were obtained by comparison: the high-performance slow-release ice and snow melting material is doped, so that the bonding strength of an ice layer and a mixture interface can be reduced by about 50%. Under the condition of long-term low temperature and heavy snow in winter, the road surface has accumulated snow and ice, the ice layer on the surface of the ice and snow melting asphalt road surface is easier to remove, the effect similar to that of passively spreading a snow melting agent is achieved, the efficiency of manually removing the ice and the snow in winter of the expressway is improved, and the expressway is ensured to be smooth and safe.
3. Flowing water scouring conductivity test experiment
The conductivity of the solution ions can reflect the ice and snow melting effect on the side surface, and in order to further reflect the temperature control performance of the high-performance slow-release ice and snow melting material at normal temperature, a flowing water scouring experiment is carried out at room temperature, and the specific method comprises the following steps:
(1) preparing three rut board test pieces of the thin layer overlay material doped with the high-performance slow-release ice and snow melting agent of the embodiment, and demolding for later use;
(2) and (3) flushing the test piece by using running water, and measuring the conductivity of the flushed solution at certain intervals.
The test results are shown in FIG. 2. The graph shows that the slow-release ice and snow melting agent prepared by the invention is slowly precipitated at room temperature and has obvious corresponding temperature effect.
Example 4
The components and contents of the sustained-release snow-melting agent of this example are shown in table 9 below.
TABLE 9 Slow-Release Ice-snow melting agent component content
The method for preparing the slow-release ice and snow melting agent comprises the following steps:
(1) preparing calcium acetate and a calcium acetate saturated solution, stirring the calcium acetate and calcium acetate saturated solution, bamboo powder and zeolite at a rotating speed of 500r/min for 7 hours under a water bath heating condition of 80 ℃ to prepare a carrier adsorption inorganic salt saturated solution, drying, adding the dried carrier adsorption inorganic salt saturated solution into an organic solution of polyvinyl chloride, continuously stirring, and performing centrifugal separation and impurity cleaning to prepare a carrier adsorption salt storage filler;
(2) drying the salt storage filler adsorbed by the prepared carrier for 12 hours, adding absolute ethyl alcohol for ultrasonic dispersion for 1 hour, stirring and dropwise adding a silane coupling agent, polytetrafluoroethylene emulsion, sodium tetraborate and potassium nitrate, and removing impurities through centrifugal separation and ultrasonic cleaning to obtain a mixture;
(3) fully dissolving benzophenone and sec-butyl acrylamide in absolute ethyl alcohol, adding the prepared mixture, heating at 40 ℃ for 0.5h, cooling, irradiating with 500w of ultraviolet light for 0.5h under nitrogen atmosphere, washing with ethanol, and drying in a vacuum box at 30 ℃ to obtain the temperature-sensitive high-performance slow-release ice and snow melting agent.
The composition and content of the thin layer cover material prepared using the slow release ice and snow melting agent of this example are shown in table 10 below.
TABLE 10 thin layer overlay material prepared with slow release ice and snow melting agent
| Serial number | Components | Content (wt.) |
| 1 | Slow-release ice and |
3 portions of |
| 2 | |
2 portions of |
| 3 | |
1 part of |
| 4 | Basalt aggregate | 60 portions of |
| 5 | |
2 portions of |
Example 5
The components and contents of the sustained-release snow-melting agent of this example are shown in table 11 below.
TABLE 11 Slow-Release Ice-snow melting agent component content
The method for preparing the slow-release ice and snow melting agent comprises the following steps:
(1) preparing saturated solution of potassium acetate and calcium acetate, mixing the saturated solution of sodium acetate and potassium acetate with bamboo powder and nano SiO2Stirring at the rotating speed of 500r/min for 7h under the water bath heating condition of 80 ℃ to prepare a carrier adsorption inorganic salt saturated solution, drying, adding the dried carrier adsorption inorganic salt saturated solution into a methyl acrylate solution, continuously stirring, and carrying out centrifugal separation and impurity cleaning to prepare a carrier adsorption salt storage filler;
(2) drying the salt storage filler adsorbed by the prepared carrier for 12 hours, adding absolute ethyl alcohol to perform ultrasonic dispersion for 1 hour, stirring and dropwise adding an aluminate coupling agent, a polytetrafluoroethylene emulsion, thiourea and potassium nitrate, and performing centrifugal separation and ultrasonic cleaning to remove impurities to obtain a mixture;
(3) fully dissolving benzophenone and sec-butyl acrylamide in absolute ethyl alcohol, adding the prepared mixture, heating for 2h at 60 ℃, cooling, irradiating for 3h by using 500w of ultraviolet light under the atmosphere of nitrogen, washing by using ethyl alcohol, and drying in a vacuum box at 30 ℃ to obtain the temperature-sensitive high-performance slow-release ice and snow melting agent.
The composition and content of the thin layer cover material prepared using the slow release ice and snow melting agent of this example are shown in table 6 below.
TABLE 12 thin layer overlay material prepared with slow release ice and snow melting agent
In addition to the above embodiments, the polymer coating material of the sustained-release ice and snow melting agent of the present invention may further include 10 parts of polystyrene, 5 parts of polyvinyl chloride, 1 part of polypropylene, 5 parts of polypropylene, or 10 parts of methyl acrylate. The prepared corrosion-inhibition ice and snow melting agent can realize the effects of normally seeping out salt under the condition of low-temperature ice and snow and preventing salt loss due to the closed pores on the surface of the filler under the condition of high-temperature rainy season, so that the slow-release salt-storage ice and snow melting filler has intelligence, and the problem of raw material waste caused by the large precipitation of the existing slow-release salt-storage filler under the condition of high-temperature rainy season is effectively solved.
Claims (10)
1. A slow-release ice and snow melting agent is characterized in that: the slow-release ice and snow melting agent comprises an ice and snow melting salt core material adsorption material and a surface high-molecular polymer wrapping material; the ice and snow melting salt core material adsorbing material comprises, by weight, 40-100 parts of inorganic ice and snow melting salt, 20-50 parts of a carrier-coated adsorbing material, 10-50 parts of a surface modification material, 2-10 parts of a hydrophobizing agent, 2-10 parts of a corrosion inhibitor, 1-5 parts of a plant growth promoter and 1-5 parts of temperature sensitive hydrogel; the high molecular polymer wrapping material comprises 10-15 parts of polystyrene, 5-10 parts of polyvinyl chloride, 1-5 parts of polypropylene or 5-10 parts of methyl acrylate.
2. The slow-release ice and snow melting agent according to claim 1, wherein: the inorganic snow-melting salt at least comprises one of sodium acetate, potassium acetate, calcium acetate or calcium acetate.
3. The slow-release ice and snow melting agent according to claim 1, wherein: the carrier-coated adsorption material at least comprises bamboo powder, zeolite, volcanic rock, modified volcanic rock, wood powder or nano SiO2One kind of (1).
4. The slow-release ice and snow melting agent according to claim 1, wherein: the surface modification material comprises span, a silane coupling agent or an aluminate coupling agent.
5. The slow-release ice and snow melting agent according to claim 1, wherein: the hydrophobic agent comprises silicone rubber emulsion or polytetrafluoroethylene emulsion.
6. The slow-release ice and snow melting agent according to claim 1, wherein: the temperature-sensitive hydrogel comprises acrylamides and benzophenone accounting for 1/3-1/4 parts by weight of the temperature-sensitive hydrogel, wherein the acrylamides comprise poly (isopropyl acrylamide), tert-butyl acrylamide or sec-butyl acrylamide.
7. The slow-release ice and snow melting agent according to claim 1, wherein: the corrosion inhibitor comprises sodium dihydrogen phosphate, sodium silicate, sodium tripolyphosphate, sodium tetraborate or thiourea.
8. The high-performance slow-release ice and snow melting agent according to claim 1, wherein: the plant growth promoter comprises urea or potassium nitrate.
9. A method of preparing the sustained release ice and snow melting agent of claim 1, comprising the steps of:
(1) preparing saturated solution of inorganic snow-melting salt, heating the saturated solution and a carrier-coated adsorbing material in water bath and stirring to prepare saturated emulsion of the carrier-adsorbed inorganic salt, drying, adding the saturated emulsion into an organic solution of a high-molecular surface polymer coating material, and stirring, centrifugally separating and cleaning to prepare a salt storage filler adsorbed by the carrier;
(2) drying the salt storage filler adsorbed by the carrier in the step, adding absolute ethyl alcohol for ultrasonic dispersion, stirring, adding a surface modification material, a hydrophobing agent, a corrosion inhibitor and a plant growth promoter, performing centrifugal separation, and cleaning to obtain a mixture;
(3) and (3) dissolving the temperature-sensitive hydrogel in absolute ethyl alcohol, adding the mixture prepared in the step (2), heating and reacting for 0.5-2h at 40-60 ℃, irradiating for 0.5-3h by ultraviolet light under the condition of inert gas, washing, and drying to obtain the temperature-sensitive slow-release salt-storage ice-snow melting filler.
10. A thin-layer cover material is characterized by comprising the following raw materials in parts by weight: 3-10 parts of slow-release ice and snow melting agent, 2-10 parts of emulsified asphalt, 1-10 parts of waterborne epoxy resin, 60-90 parts of basalt aggregate and 2-8 parts of limestone mineral powder according to claim 1.
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| CN114703714A (en) * | 2022-03-24 | 2022-07-05 | 东南大学 | Self-supplementing salt-storage ice-snow-melting asphalt concrete pavement structure based on concentration gradient |
| CN114752354A (en) * | 2022-05-26 | 2022-07-15 | 重庆交通大学 | Negative thermal expansion snow-melting ice-suppressing material and preparation method and application thereof |
| CN114806505A (en) * | 2022-05-24 | 2022-07-29 | 河北科技大学 | Self-melting ice preparation process of sustained-release microcapsules |
| CN114988742A (en) * | 2022-06-13 | 2022-09-02 | 重庆交通大学 | Slow-release long-acting type anti-freezing material and preparation method thereof |
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| CN114752354A (en) * | 2022-05-26 | 2022-07-15 | 重庆交通大学 | Negative thermal expansion snow-melting ice-suppressing material and preparation method and application thereof |
| CN114988742A (en) * | 2022-06-13 | 2022-09-02 | 重庆交通大学 | Slow-release long-acting type anti-freezing material and preparation method thereof |
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