CN115141545B - Steel wheel isolating agent suitable for asphalt pavement and preparation method and application thereof - Google Patents
Steel wheel isolating agent suitable for asphalt pavement and preparation method and application thereof Download PDFInfo
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- CN115141545B CN115141545B CN202210954759.8A CN202210954759A CN115141545B CN 115141545 B CN115141545 B CN 115141545B CN 202210954759 A CN202210954759 A CN 202210954759A CN 115141545 B CN115141545 B CN 115141545B
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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
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
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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
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
Abstract
The invention discloses a steel wheel isolating agent suitable for an asphalt pavement, a preparation method and application thereof, and belongs to the technical field of asphalt construction pavement materials. The steel wheel release agent consists of the following components in parts by mass: 30-40 parts of glycerin, 10-20 parts of polysiloxane, 1-6 parts of fullerene, 0.1-0.3 part of aromatic, 60-80 parts of water, 0.1-1 part of preservative, 8-15 parts of emulsifier and 0.5-2 parts of dispersing agent. The steel wheel release agent disclosed by the invention has the advantages of good fluidity, strong wheel-sticking prevention effect and wide application range, and can be suitable for asphalt pavement rolling work in a low-temperature environment. The steel wheel isolating agent disclosed by the invention is simple in preparation process and good in isolating effect, and can not cause cracking or wheel sticking of an asphalt pavement when the steel wheel road roller works, so that the working efficiency of the steel wheel road roller can be improved, the construction quality is ensured, and the material is environment-friendly and pollution-free.
Description
Technical Field
The invention belongs to the technical field of asphalt construction pavement materials, and particularly relates to a steel wheel isolating agent suitable for an asphalt pavement, and a preparation method and application thereof.
Background
When the road roller carries out construction operation on the just laid asphalt pavement, if proper isolating agent is not used, asphalt can be adhered to the steel wheel in the rolling process, so that the rolling effect of the asphalt pavement is affected, the road surface at the later stage of construction can be damaged, the structural damage of the road surface can be caused, and the use quality of the road is affected.
To steel wheel road roller, generally adopted is the watering method prevents that pitch from sticking the wheel, but a large amount of watering can lead to pitch surface temperature to reduce, especially is under construction when ambient temperature is low, uses this kind of mode to influence the compaction quality of mixture more, leads to local compaction difficulty, still can appear segregating the phenomenon, makes pitch surface's roughness and homogeneity variation, and then influences the durability of bituminous paving.
The isolating agent is used for replacing a sprinkling method, so that the phenomenon of sticking wheels can be reduced. However, the quality of the release agent can determine the degree of sticking the asphalt in the rolling process, so that only by improving the quality of the steel wheel release agent, the asphalt can be better ensured to be not stuck on the wheels, and further, the good compactness of the asphalt pavement is ensured.
Disclosure of Invention
The invention provides a steel wheel isolating agent material, which is prepared by the method of the invention, and finally provides an environment-friendly, safe and excellent isolating effect steel wheel isolating agent which is mainly used for solving the problem of asphalt sticking when a steel wheel road roller paves and rolls asphalt pavement.
Based on the above, the present invention provides the following technical solutions:
the steel wheel release agent consists of the following components in parts by weight:
30-40 parts of glycerin, 10-20 parts of polysiloxane, 1-6 parts of fullerene, 0.1-0.3 part of aromatic, 60-80 parts of water, 0.1-1 part of preservative, 8-15 parts of emulsifier and 0.5-2 parts of dispersing agent.
In the technical scheme, the polysiloxane is dimethyl silicone oil.
In the above technical scheme, the aromatic is one or more selected from 1-chloronaphthalene, 1,2, 4-trichlorobenzene, bromoform or linalool.
In the technical scheme, the preservative is one or more selected from potassium sorbate, sodium diacetate and sodium lactate.
In the technical scheme, the emulsifier is one or more selected from Span-80, span-60, tween-80, tween-60 and OP-10.
In the technical scheme, the dispersing agent is selected from one or more of stearamide, higher fatty alcohol and vinyl bis-stearamide.
The preparation method of the steel wheel release agent comprises the following steps:
mixing water, glycerol, polysiloxane and fullerene, and uniformly stirring to obtain a mixed solution A; heating the mixed solution A to 60-80 ℃ and keeping for 30min; adding an aromatic into the mixed solution A, and uniformly stirring to obtain a mixed solution B; adding preservative, emulsifier and dispersant into the mixed solution B, heating to 80-110 ℃, and shearing at high speed to obtain mixed emulsion; and cooling the mixed emulsion to obtain the steel wheel release agent.
The invention provides the application of the steel wheel isolating agent, which is used for solving the problem of asphalt sticking wheels when a steel wheel road roller paves and rolls asphalt pavement.
A method for preventing asphalt from adhering to a steel wheel of a road roller comprises the following steps:
and (3) placing the isolating agent and water into a container according to the proportion of 1:20, stirring for 20min at the stirring speed of 300r/min, adding the mixture into a water tank of the steel wheel road roller after stirring uniformly, diluting, and when the steel wheel road roller is ready to roll on an asphalt pavement, adopting an automatic spraying mode by the water tank of the steel wheel road roller, wherein the isolating agent in the water tank is sprayed on the surface of the steel wheel, and then rolling the road roller to prevent asphalt from adhering to the surface of the steel wheel.
In the present invention, glycerin can improve the film forming property of the release agent. The polyoxy silane can improve the isolation effect of the isolating agent and increase the lubrication effect. Fullerenes can be used to improve the lubricity of the release agent while being resistant to aging. The preservative can improve the quality of asphalt mixture and improve the corrosion resistance. The emulsifier may form a stable emulsion from two or more mutually immiscible synthetic mixed liquids. The dispersant has the function of keeping the dispersion system relatively stable.
The beneficial effects of the invention are as follows:
fullerene is added into the steel wheel release agent, so that the lubricating effect of the steel wheel release agent can be fully improved, and meanwhile, the release agent is endowed with extremely strong oxidation resistance and ageing resistance. The steel wheel release agent disclosed by the invention has the advantages of good fluidity, strong wheel-sticking prevention effect and wide application range, and can be suitable for asphalt pavement rolling operation in a low-temperature environment. The steel wheel isolating agent disclosed by the invention is simple in preparation process and good in isolating effect, and can not cause cracking or wheel sticking of an asphalt pavement when the steel wheel road roller works, so that the working efficiency of the steel wheel road roller can be improved, the construction quality is ensured, and the material is environment-friendly and pollution-free.
Drawings
FIG. 1 is a construction drawing of a steel wheel road roller for paving and rolling asphalt pavement; wherein, in the construction process, the steel wheel release agent prepared in the embodiment 1 of the invention is adopted.
Detailed Description
The materials used in the invention are as follows:
glycerol: molecular weight: 92.09 colorless viscous liquid, odorless, warm sweet, moisture absorbing, melting point (DEG C): 18.18, boiling point (. Degree. C.): 290.9, flash point (c): 177, ignition temperature (°c): 370.
polysiloxane: molecular weight: 162.379, density: 0.963, melting point: -50 ℃, flash point: refractive index at 300 ℃): 1.403, colorless odorless transparent liquid.
Fullerene (C) 60 ): nontoxic, molecular weight: 720, melting point greater than 280 ℃, density: 1.68g/cm 3 Flash point: 94 ℃.
Potassium sorbate: molecular weight: 150.22, melting point: 270 ℃, density: 1.36g/cm 3 Flash point: 139.9 ℃, white to pale yellow scaly crystals, crystal particles or crystal powders.
Sodium diacetate: molecular weight: 142.09, melting point: white crystalline rice flour at 150 ℃.
Sodium lactate molecular weight: 112.06, density: 1.326g/cm 3 A colorless or nearly colorless syrup-like liquid.
Span-80: molecular weight: 428.6, density: 0.994g/mL, flash point >230 ℃, amber to brown.
Span-60: molecular weight 430.63, pale yellow powder or solid block, slightly fatty smell, melting point 56-58 ℃.
Tween-80: flash point >110 ℃, a pale yellow viscous liquid.
Tween-60: the lemon-orange oily liquid or semi-gel is slightly special odor and slightly bitter.
OP-10: pH value: 6 to 7 (1% aqueous solution), cloud point: 61-67 ℃.
Stearamide: molecular weight: 283.4925, melting point: 96-104 ℃, boiling point: 408.23 ℃, flash point: 207.53 ℃, density: 0.868g/cm 3 。
The higher fatty alcohol is typically a vegetable oil.
Vinyl bis-stearamide: molecular weight: 593.0222, melting point: 141 ℃, boiling point: 80 ℃, density: 0.97g/cm 3 Flash point: 280 ℃.
Bromoform: molecular weight: 252.731, melting point: 8 ℃, boiling point: 150 ℃, density: 2.89g/cm 3 The appearance was colorless to yellow liquid. Linalool: molecular weight: 154.25, melting point: flash point at 20 ℃): 55 ℃, boiling point: 198 ℃, density: 0.858-0.868 g/cm 3 . 1-chloronaphthalene: molecular weight: 162.6156, melting point: -20 ℃, boiling point: 260.27 ℃, flash point: 121.11 ℃, density: 1.2g/cm 3 .1,2, 4-trichlorobenzene: molecular weight: 181.447, melting point: 16 ℃, boiling point: 214 ℃, flash point: 105 ℃, density: 1.454g/cm 3 The appearance isColorless liquid.
Other terms used in the present invention, unless otherwise indicated, generally have meanings commonly understood by those of ordinary skill in the art. The invention will be described in further detail below in connection with specific embodiments and with reference to the data. The following examples are intended to illustrate the invention and are not intended to limit the scope of the invention in any way.
Example 1
The formula of the steel wheel isolating agent comprises the following components:
30 parts of glycerin, 10 parts of polysiloxane, 5 parts of fullerene, 0.1 part of aromatic, 80 parts of water, 0.2 part of preservative, 10 parts of emulsifier and 0.5 part of dispersing agent; wherein the aromatic is a composition of 1-chloronaphthalene and 1,2, 4-trichlorobenzene, and the mass ratio of the 1:1; the preservative is a composition of sodium diacetate and sodium lactate, and the mass ratio of the sodium diacetate to the sodium lactate is 1:1; the emulsifier is a composition of Span-80 and OP-10, and the mass ratio of the Span-80 to the OP-10 is 1:1; the dispersing agent is a composition of hard amide and higher fatty alcohol, and the mass ratio of the hard amide to the higher fatty alcohol is 1:1.
Preparing a steel wheel release agent:
mixing water, glycerol, polysiloxane and fullerene, stirring at 800rpm for 30min, and obtaining a mixed solution A after uniform stirring; heating the mixed solution A to 60 ℃ and keeping for 30min; adding the aromatic into the mixed solution A, stirring at 1000rpm for 30min, and uniformly stirring to obtain a mixed solution B; adding a preservative, an emulsifying agent and a dispersing agent into the mixed solution B, heating to 80 ℃, and shearing for 1h at 3000r/min to obtain a mixed emulsion; pouring out the mixed emulsion, and cooling for 1h to obtain the steel wheel release agent.
Example 2
The formula of the steel wheel isolating agent comprises the following components:
30 parts of glycerin, 10 parts of polysiloxane, 4 parts of fullerene, 0.1 part of aromatic, 80 parts of water, 0.2 part of preservative, 10 parts of emulsifier and 0.5 part of dispersing agent; wherein the aromatic is a composition of bromoform and linalool, and the mass ratio of the bromoform to the linalool is 1:1; the preservative is a composition of sodium diacetate and sodium lactate, and the mass ratio of the sodium diacetate to the sodium lactate is 1:1; the emulsifier is a combination of Tween-80 and OP-10, and the mass ratio of the two is 1:1; the dispersing agent is vinyl bis-stearamide.
Preparing a steel wheel release agent:
mixing water, glycerol, polysiloxane and fullerene, stirring at 800rpm for 30min, and obtaining a mixed solution A after uniform stirring; heating the mixed solution A to 80 ℃ and keeping for 30min; adding the aromatic into the mixed solution A, stirring at 1000rpm for 30min, and uniformly stirring to obtain a mixed solution B; adding a preservative, an emulsifying agent and a dispersing agent into the mixed solution B, heating to 90 ℃, and shearing for 1h at 3000r/min to obtain a mixed emulsion; pouring out the mixed emulsion, and cooling for 1h to obtain the steel wheel release agent.
Example 3
The formula of the steel wheel isolating agent comprises the following components:
30 parts of glycerin, 15 parts of polysiloxane, 4 parts of fullerene, 0.1 part of aromatic, 80 parts of water, 0.2 part of preservative, 10 parts of emulsifier and 1 part of dispersing agent; wherein the aromatic is a composition of 1-chloronaphthalene, 1,2, 4-trichlorobenzene, bromoform and linalool, and the mass ratio of the four is 1:1:1:1; the preservative is a composition of sodium diacetate and sodium lactate, and the mass ratio of the sodium diacetate to the sodium lactate is 1:1; the emulsifier is a composition of Span-80 and OP-10, and the mass ratio of the Span-80 to the OP-10 is 1:1; the dispersing agent is vinyl bis-stearamide.
Preparing a steel wheel release agent:
mixing water, glycerol, polysiloxane and fullerene, stirring at 800rpm for 30min, and obtaining a mixed solution A after uniform stirring; heating the mixed solution A to 80 ℃ and keeping for 30min; adding the aromatic into the mixed solution A, stirring at 1000rpm for 30min, and uniformly stirring to obtain a mixed solution B; adding a preservative, an emulsifying agent and a dispersing agent into the mixed solution B, heating to 85 ℃, and shearing for 1h at 3000r/min to obtain a mixed emulsion; pouring out the mixed emulsion, and cooling for 1h to obtain the steel wheel release agent.
Example 4
The formula of the steel wheel isolating agent comprises the following components:
35 parts of glycerin, 10 parts of polysiloxane, 5 parts of fullerene, 0.1 part of aromatic, 80 parts of water, 0.2 part of preservative, 10 parts of emulsifier and 0.5 part of dispersing agent; wherein the aromatic agent is a combination of 1-chloronaphthalene and 1,2, 4-trichlorobenzene, and the mass ratio of the 1-chloronaphthalene to the 1,2, 4-trichlorobenzene is 2:1; the preservative is a composition of sodium diacetate and sodium lactate, and the mass ratio of the sodium diacetate to the sodium lactate is 1:1; the emulsifier is a composition of Span-80 and OP-10, and the mass ratio of the Span-80 to the OP-10 is 1:1; the dispersing agent is a composition of hard amide and higher fatty alcohol, and the mass ratio of the hard amide to the higher fatty alcohol is 1:1.
Preparing a steel wheel release agent:
mixing water, glycerol, polysiloxane and fullerene, stirring at 800rpm for 30min, and obtaining a mixed solution A after uniform stirring; heating the mixed solution A to 70 ℃ and keeping for 30min; adding the aromatic into the mixed solution A, stirring at 1000rpm for 30min, and uniformly stirring to obtain a mixed solution B; adding a preservative, an emulsifying agent and a dispersing agent into the mixed solution B, heating to 85 ℃, and shearing for 1h at 3000r/min to obtain a mixed emulsion; pouring out the mixed emulsion, and cooling for 1h to obtain the steel wheel release agent.
Example 5
The formula of the steel wheel isolating agent comprises the following components:
30 parts of glycerin, 10 parts of polysiloxane, 4 parts of fullerene, 0.1 part of aromatic, 80 parts of water, 0.2 part of preservative, 12 parts of emulsifier and 0.5 part of dispersing agent; wherein the aromatic agent is the combination of 1-chloronaphthalene, 1,2, 4-trichlorobenzene and linalool, and the mass ratio of the three is 1:1:1; the preservative is a composition of sodium diacetate and sodium lactate, and the mass ratio of the sodium diacetate to the sodium lactate is 1:1; the emulsifier is a combination of Tween-80 and OP-10, and the mass ratio of the two is 1:1; the dispersing agent is a composition of hard amide and higher fatty alcohol, and the mass ratio of the hard amide to the higher fatty alcohol is 1:1.
Preparing a steel wheel release agent:
mixing water, glycerol, polysiloxane and fullerene, stirring at 800rpm for 30min, and obtaining a mixed solution A after uniform stirring; heating the mixed solution A to 70 ℃ and keeping for 30min; adding the aromatic into the mixed solution A, stirring at 1000rpm for 30min, and uniformly stirring to obtain a mixed solution B; adding a preservative, an emulsifying agent and a dispersing agent into the mixed solution B, heating to 90 ℃, and shearing for 1h at 3000r/min to obtain a mixed emulsion; pouring out the mixed emulsion, and cooling for 1h to obtain the steel wheel release agent.
Comparative example 1
The formula of the steel wheel isolating agent comprises the following components:
30 parts of glycerin, 5 parts of polysiloxane, 1 part of fullerene, 0.1 part of aromatic, 80 parts of water, 0.2 part of preservative, 8 parts of emulsifier and 0.5 part of dispersing agent; wherein the aromatic is a composition of 1-chloronaphthalene and 1,2, 4-trichlorobenzene, and the mass ratio of the 1:1; the preservative is a composition of sodium diacetate and sodium lactate, and the mass ratio of the sodium diacetate to the sodium lactate is 1:1; the emulsifier is a composition of Span-80 and OP-10, and the mass ratio of the Span-80 to the OP-10 is 1:1; the dispersing agent is a composition of hard amide and higher fatty alcohol, and the mass ratio of the hard amide to the higher fatty alcohol is 1:1.
Preparing a steel wheel release agent:
mixing water, glycerol, polysiloxane and fullerene, stirring at 800rpm for 30min, and obtaining a mixed solution A after uniform stirring; heating the mixed solution A to 60 ℃ and keeping for 30min; adding the aromatic into the mixed solution A, stirring at 1000rpm for 30min, and uniformly stirring to obtain a mixed solution B; adding a preservative, an emulsifying agent and a dispersing agent into the mixed solution B, heating to 80 ℃, and shearing for 1h at 3000r/min to obtain a mixed emulsion; pouring out the mixed emulsion, and cooling for 1h to obtain the steel wheel release agent.
Comparative example 2
The formula of the steel wheel isolating agent comprises the following components:
30 parts of glycerin, 10 parts of polysiloxane, 0.1 part of aromatic, 80 parts of water, 0.2 part of preservative, 10 parts of emulsifier and 0.5 part of dispersing agent; wherein the aromatic is a composition of 1-chloronaphthalene and 1,2, 4-trichlorobenzene, and the mass ratio of the 1:1; the preservative is a composition of sodium diacetate and sodium lactate, and the mass ratio of the sodium diacetate to the sodium lactate is 1:1; the emulsifier is a composition of Span-80 and OP-10, and the mass ratio of the Span-80 to the OP-10 is 1:1; the dispersing agent is a composition of hard amide and higher fatty alcohol, and the mass ratio of the hard amide to the higher fatty alcohol is 1:1.
Preparing a steel wheel release agent:
mixing water, glycerol and polysiloxane, stirring at 800rpm for 30min, and obtaining a mixed solution A after uniform stirring; heating the mixed solution A to 60 ℃ and keeping for 30min; adding the aromatic into the mixed solution A, stirring at 1000rpm for 30min, and uniformly stirring to obtain a mixed solution B; adding a preservative, an emulsifying agent and a dispersing agent into the mixed solution B, heating to 80 ℃, and shearing for 1h at 3000r/min to obtain a mixed emulsion; pouring out the mixed emulsion, and cooling for 1h to obtain the steel wheel release agent.
Comparative example 3
The formula of the steel wheel isolating agent comprises the following components:
30 parts of glycerin, 5 parts of polysiloxane, 1 part of fullerene, 0.1 part of aromatic, 80 parts of water, 0.2 part of preservative, 5 parts of emulsifier and 0.5 part of dispersing agent; wherein the aromatic is a composition of bromoform and linalool, and the mass ratio of the bromoform to the linalool is 2:1; the preservative is a composition of sodium diacetate and sodium lactate, and the mass ratio of the sodium diacetate to the sodium lactate is 1:1; the emulsifier is a composition of Span-80 and OP-10, and the mass ratio of the Span-80 to the OP-10 is 1:1; the dispersing agent is a composition of hard amide and higher fatty alcohol, and the mass ratio of the hard amide to the higher fatty alcohol is 1:1.
Preparing a steel wheel release agent:
mixing water, glycerol, polysiloxane and fullerene, stirring at 800rpm for 15min, and obtaining a mixed solution A after uniform stirring; heating the mixed solution A to 60 ℃ and keeping for 30min; adding the aromatic into the mixed solution A, stirring at 1000rpm for 30min, and uniformly stirring to obtain a mixed solution B; adding a preservative, an emulsifying agent and a dispersing agent into the mixed solution B, heating to 80 ℃, and shearing for 0.5h at 3000r/min to obtain a mixed emulsion; pouring out the mixed emulsion, and cooling for 1h to obtain the steel wheel release agent.
Performance test of Steel wheel Release agent
The test is mainly used for measuring the dynamic viscosity, corrosiveness, asphalt mixture adhesiveness, film forming durability and surface tension of the steel wheel release agent.
1. Dynamic viscosity test
According to T0620-2000, a heated viscometer is placed in a container, a steel wheel release agent sample is injected into the capillary viscometer from a loading tube, and the sample should not adhere to the tube wall. And (3) placing the capillary viscosimeter with the sample back into an electric oven (135+/-5.5 ℃), and preserving the temperature for 10+/-2 minutes to enable bubbles generated by the sample in the tube to escape. Three capillary viscometers are taken out of the oven, cooled for 2min at room temperature, and then are arranged in a constant-temperature water tank which keeps the test temperature, the position of the capillary viscometer is at least 20mm below the liquid level of the water tank, the viscometer is taken out of the oven, and the process time of placing the capillary viscometer in the constant-temperature water tank is within 5 min. The vacuum system and viscometer are connected and the valve is closed. The vacuum pump was started to bring the vacuum degree to 40 kPa.+ -. 66.5Pa (300 mmHg.+ -. 0.5 mmHg). The viscometer is held in the sink for 30 minutes, the pressure relief valve is opened, two stopwatches are started simultaneously as the sample is sucked to the first reticle, the time between successive pairs of reticles is measured, and the first symbol and time exceeding 60 seconds are recorded.
2. Corrosion test of Steel wheels
Taking the surface of a steel wheel with the length of 10cm multiplied by 10cm as a test piece, blending the isolating agent and water in the ratio of 1:20, uniformly spraying the isolating agent and water on the surface of the test piece for three times, waiting for 1h, firstly, observing whether obvious corrosion marks appear on the surface of the test piece, and then carefully observing the surface of the test piece by using a microscope to check whether the surface has corrosion phenomena.
3. Asphalt mixture adhesion test
Preparing a release agent solution according to the proportion of release agent to water of 1:20 according to T0703-2011, spraying a proper amount of release agent solution uniformly on the surface of a wheel rolling forming machine, placing a test piece to be rolled under the wheel rolling forming machine, rolling the test piece according to the Highway engineering asphalt and asphalt mixture test procedure, and observing whether asphalt mixture is adhered to the surface of the wheel rolling forming machine after rolling.
4. Film forming durability test for steel wheel
Uniformly spraying the prepared isolating agent on the surface of the steel wheel, continuously rolling on an asphalt pavement, recording the time durability after film formation by using a stopwatch, starting the stopwatch timing when the steel wheel road roller starts to work, arranging two observers to check the steel wheel at the moment, and immediately stopping timing when the phenomenon of asphalt adhesion on the surface of the steel wheel is found, wherein the recorded time is the film formation time of the steel wheel.
5. Surface tension test
The surface tension can calibrate the lubrication effect of the steel wheel release agent. According to the SH/T1156-2014 surface tension measurement test, the surface tension of the steel wheel release agent was measured by an automatic surface tensiometer. The experiment was performed in an environment of 20 c, first the surface tensiometer was turned on and the platinum plate was preheated for 30min. And placing the sample under the platinum plate, wherein the difference between the sample and the platinum plate is 3-5 mm, carrying out three continuous measurement, and taking the data of the last two times to average.
The test results are shown in table 1:
TABLE 1
As is clear from Table 1, the steel wheel of example 1 had the longest film forming durability, up to 68 minutes, and the lowest surface tension and the best lubricity. The comparative example 1 and comparative example 3 have reduced fullerene components, resulting in asphalt adhesion and reduced lubrication effect. Comparative example 2 was free of fullerene, the steel wheel was corrosive and had a sticking phenomenon, and the steel wheel was also the worst in film forming durability and lubricating property.
Therefore, the fullerene can prevent the steel wheel from being corroded and endow the steel wheel release agent with good lubricating effect. The steel wheel isolating agent can more effectively avoid asphalt from sticking to the wheels, improve the working efficiency and construction quality of the steel wheel road roller during paving and rolling, and enhance the asphalt isolating effect.
Impact test of Steel wheel Release agent
To determine whether the steel wheel release agent adversely affects the high temperature stability, plasticity and consistency properties of asphalt, the asphalt to which the release agent was added was tested for softening point, ductility and penetration index as follows:
1. softening Point test
The test can evaluate the high-temperature stability of asphalt, and the specific test method is carried out according to the softening point of T0606-2011 asphalt in JTG E20-2011. The test adopts a full-automatic asphalt softening point tester, and the sample is asphalt added with a release agent. Firstly, the softening point is measured by using water, distilled water or purified water is boiled before the test, no bubbles exist in the water, and the initial temperature of the test is 5+/-0.5 ℃. When the softening point of the sample was at about 80℃or more, the softening point was again measured by changing the medium to glycerin, and the initial temperature of the test was 32.+ -. 1 ℃. Three sets of parallel tests were set, and when the measured values meet the requirements of repeatability errors (< 80 ℃ at 1 ℃ and > 80 ℃ at 2 ℃), the average value thereof was taken as a softening point test result.
2. Ductility test
This test is an important indicator for evaluating asphalt plasticity. The test comprises the steps of uniformly stirring a steel wheel isolating agent, coating the steel wheel isolating agent on the inner sides of a glass plate and a side die, injecting asphalt into the die, taking out a test piece in a constant-temperature water tank, scraping by a scraper, and immersing the test die and a bottom plate in the water tank with a specified test temperature for 1-1.5 h. And (5) checking the extension speed of the extensometer, and moving the slide plate pointer to face the zero point of the scale. Injecting water into the ductility tester, and preserving heat to the test temperature of +/-0.5 ℃. And taking down the side mold. The water surface should be no less than 25mm from the test piece surface. The extensometer is started, and the extension condition of the test sample is observed, and the test sample reads when being broken. Three sets of parallel tests were set and the average value thereof was taken as the test result of ductility.
3. Penetration test
This test is a method of evaluating asphalt consistency. The asphalt sample added with the isolating agent is injected into a sample container, the sample container is cooled at a specified temperature, a flat-bottom glass container is placed on a needle penetrometer platform, a needle connecting rod is put down, the needle point is just contacted with the surface of the sample, the needle point is lightly contacted with the top end of the needle connecting rod, and the pointer indication of an adjusting dial or a depth indicator is zero. In a prescribed time, the automatic falling penetration pattern of the standard needle was recorded, and the reading of the dial pointer or displacement indicator was read to the nearest 0.5 (0.1 mm). Three sets of parallel tests were set and the average value thereof was taken as the test result of ductility.
The test results are shown in table 2:
TABLE 2
As is clear from Table 2, the steel wheel release agent of the present invention has no effect on the softening point, penetration and ductility of asphalt.
(III) other Performance test
The anti-aging effect and the effect of the steel wheel release agent in a low-temperature environment are tested, and the test is as follows:
1. oxidation resistance test
The steel wheel release agent was subjected to an oxidation resistance test according to HB 5258-2000 weight increase method. A steel wheel sample of 20mm by 10mm by 2mm was selected and a release agent was uniformly sprayed on the surface. The sample was placed in a desiccator and allowed to stand for 1 hour, and the sample was weighed. The prepared sample and the porcelain boat are paired and weighed, the furnace temperature is 600 ℃, and the sample is placed in the center of the porcelain boat, and the time is the starting time of the test. The test period is 100h, the samples are taken out and weighed once every 25h, finally, the samples are taken out, kept stand and cooled, and then put into a dryer for weighing after 1 h. Three sets of parallel experiments were set and averaged.
The test results are shown in table 3:
TABLE 3 Table 3
| Category(s) | Average oxidation speed (g/m) 2 ·h) | Average oxide scale shedding (g/m) 2 ) |
| Example 1 | 0.08 | 0.85 |
| Example 2 | 0.39 | 2.1 |
| Example 3 | 0.45 | 3.0 |
| Example 4 | 0.09 | 0.93 |
| Example 5 | 0.42 | 3.5 |
| Comparative example 1 | 8.7 | 11.0 |
| Comparative example 2 | 9.8 | 11.8 |
| Comparative example 3 | 8.3 | 11.2 |
As can be seen from table 3, the fullerenes have a significant effect on the oxidation resistance of the steel wheel release agent. The average oxidation rate of the composite material is as high as 9.8, the average oxide scale falling-off amount is 11.8, and the antioxidation effect is poor as shown in comparative example 2. And the addition of the proper fullerene can have good antioxidation effect, the average oxidation speed of the isolating agent is 0.08, and the average oxide scale shedding amount is 0.85 as shown in the embodiment 1. In addition, the steel wheel can be prevented from being oxidized and corroded prematurely due to the good oxidation resistance effect, and meanwhile the service life of the steel wheel can be prolonged, so that the anti-aging effect is achieved.
2. Low temperature stability test
The test aims at checking whether the components of the steel wheel isolating agent are still stable in a low-temperature state and can achieve the wheel-non-sticking effect. Therefore, it is necessary to conduct a wheel sticking test on the steel wheel release agent at low temperature. This time the test will be performed at a temperature of 0 ℃, -10 ℃, -15 ℃. Preparing a release agent solution according to the proportion of release agent to water of 1:20 according to T0703-2011, spraying a proper amount of release agent solution uniformly on the surface of a wheel rolling forming machine, placing a test piece to be rolled under the wheel rolling forming machine, rolling the test piece according to the Highway engineering asphalt and asphalt mixture test procedure, and observing whether asphalt mixture is adhered to the surface of the wheel rolling forming machine after rolling.
TABLE 4 Table 4
| Category(s) | Asphalt adhesion case (0 ℃ C.) | Asphalt adhesion condition (-10 ℃ C.) | Asphalt adhesion condition (-15 ℃ C.) |
| Example 1 | Without any means for | Without any means for | Without any means for |
| Example 2 | Without any means for | Without any means for | Without any means for |
| Example 3 | Without any means for | Without any means for | Without any means for |
| Example 4 | Without any means for | Without any means for | Without any means for |
| Example 5 | Without any means for | Without any means for | Without any means for |
| Comparative example 1 | Without any means for | Has the following components | Has the following components |
| Comparative example 2 | Has the following components | Has the following components | Has the following components |
| Comparative example 3 | Has the following components | Has the following components | Has the following components |
From table 4, it can be seen that fullerenes also have an important effect on the low temperature performance of the steel wheel release agent. For comparative example 2 without fullerene component, which was not applicable at low temperature, asphalt sticking phenomenon occurred. In comparative examples 1 and 3, the fullerene component was contained, but the component was small, and the asphalt adhesion prevention effect was not good at low temperature, and thus it was not suitable for use at low temperature.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the invention in any way, and any person skilled in the art may make modifications or alterations to the disclosed technical content to the equivalent embodiments. However, any simple modification, equivalent variation and variation of the above embodiments according to the technical substance of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (3)
1. The steel wheel release agent is characterized by comprising the following components in parts by weight:
30-40 parts of glycerin, 10-20 parts of polysiloxane, 1-6 parts of fullerene, 0.1-0.3 part of aromatic, 60-80 parts of water, 0.1-1 part of preservative, 8-15 parts of emulsifier and 0.5-2 parts of dispersing agent;
the aromatic is selected from one or more of 1-chloronaphthalene, 1,2, 4-trichlorobenzene, bromoform or linalool; the preservative is one or more selected from potassium sorbate, sodium diacetate and sodium lactate; the emulsifier is one or more selected from Span-80, span-60, tween-80, tween-60 and OP-10; the dispersing agent is one or more selected from stearamide, higher fatty alcohol and vinyl bis-stearamide;
the preparation method of the steel wheel release agent comprises the following steps:
mixing water, glycerol, polysiloxane and fullerene, and uniformly stirring to obtain a mixed solution A; heating the mixed solution A to 60-80 ℃ and keeping for 30min; adding an aromatic into the mixed solution A, and uniformly stirring to obtain a mixed solution B; adding preservative, emulsifier and dispersant into the mixed solution B, heating to 80-110 ℃, and shearing at high speed to obtain mixed emulsion; and cooling the mixed emulsion to obtain the steel wheel release agent.
2. The use of the steel wheel release agent of claim 1 to solve the problem of asphalt sticking when a steel wheel road roller is used for paving and rolling asphalt pavement.
3. A method for preventing asphalt from adhering to a road roller steel wheel, comprising the steps of:
the release agent and water according to the claim 1 are put into a container according to the proportion of 1:20 and stirred for 20min, the stirring speed is 300r/min, the mixture is added into a water tank of a steel wheel road roller after being stirred uniformly, when the steel wheel road roller is ready to roll on an asphalt pavement after dilution, the water tank of the steel wheel road roller adopts an automatic spraying mode, the release agent in the water tank is sprayed on the surface of the steel wheel at first, and the road roller performs rolling operation again, so that asphalt is prevented from adhering to the surface of the steel wheel.
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| US8367739B2 (en) * | 2004-12-29 | 2013-02-05 | Troxler Electronic Laboratories, Inc. | Asphalt release agent |
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