CN108285648B - A kind of pavement asphalt deicing anti-stripping additive and preparation method - Google Patents

Abstract

A pavement asphalt deicing anti-stripping additive and a preparation method, the additive comprises the following components by weight: 60%-90% of deicing agent; 5%-35% of anti-stripping agent; One or more of the filler and anti-aging agent, and the content of the filler and anti-aging agent is: filler 0.1-5.0%; anti-aging agent 0.1-5.0%. The additive of the invention can remarkably improve the low-temperature deicing, anti-icing and water damage stripping performance of the pavement asphalt, and the service life of the pavement can be prolonged; the additive of the invention is safe for locomotive materials, and has no corrosion to the main metal material parts of roads and bridges. The present invention does not need special production equipment, has simple production process, and is pollution-free.

Description

A kind of pavement asphalt deicing anti-stripping additive and preparation method

technical field

The invention relates to a pavement asphalt deicing and anti-stripping additive and a preparation method, and belongs to the technical field of asphalt pavement deicing and anti-stripping.

Background technique

Under the conditions of ice and snow, when the road is covered with snow and ice, the friction coefficient of the road surface will not only be significantly reduced, but the snow may also cover the road signs, which seriously threatens the normal running of the locomotive. Therefore, de-icing and anti-icing of highway pavement is one of the indispensable activities in the transportation industry to maintain safe operation in winter. So far, no good solution has been found for ice and snow to block traffic. It is a worldwide problem, especially on highways, which can easily lead to catastrophic accidents due to the high speed of vehicles.

At present, the measures to deal with road snow can be roughly divided into two categories: removal method and ablation method. The removal method mainly uses manual or mechanical equipment to break the snow and transfer it from the road to other places to ensure road traffic safety; the ablation method mainly uses a certain snow-melting agent or heating method to convert the snow into snow. drained by flowing water. The use of snow-melting agent sprinkled on the surface of the road to suppress ice and snow is not only difficult to guarantee the use effect, but also because of the strong harmful substances in the snow-melting agent, it can corrode road materials, equipment and motor vehicles, affect the performance of the road surface, and cause a certain degree of environmental pollution. Pollution.

Generally, basalt aggregates or diabase aggregates are used in expressways, but the aggregates have poor adhesion to asphalt. During the use process, the asphalt pavement is eroded by water and causes the aggregates to peel off. Therefore, a suitable anti-stripping agent must be added to the asphalt to improve the adhesion level between the asphalt and the aggregate. The common practice is to mix some abrasive-increasing fiber materials in the construction of asphalt pavement, or have certain anti-stripping particles. Once the pavement is damaged, these materials will enter the cracks of the pavement with the movement of the vehicle, or can improve the asphalt. and aggregate adhesion. Organic amine compounds are a class of anti-stripping agents that are now more studied, mostly based on aliphatic amines, and other forms of amine-based asphalt anti-stripping agents are mainly based on phthaloamine-based polyamines and imidazolines. The amine group in the anti-stripping agent interacts with the surface of the aggregate and some hydrocarbons to form a combination, and the hydrocarbon chain acts as a connection on the surface of the hydrophilic aggregate and the hydrophobic asphalt, so the amine anti-stripping agent can better improve the asphalt. However, due to the physical adsorption of this type of exfoliating agent on the asphalt surface and poor thermal stability, the long-term performance is not very good.

Road surfaces in snowy and cold regions are prone to cracks caused by frost heave or thermal stress, which exacerbate wear. Anti-stripping nanoparticles are added in the deicing additive. When the deicing agent is slowly released, the anti-stripping additive can also be released, which can play a role in the directional repair of damaged road surfaces, thereby ensuring driving safety in areas with frequent ice condensation. By reducing the interfacial tension between asphalt and stone to enhance the adhesion between the two, thereby preventing or reducing the phenomenon of water damage to asphalt pavement; it can be seen that the development of asphalt pavement deicing and anti-stripping agents that meet the requirements of the latest standards is the current asphalt additive The main target of the material.

There are many related patent reports on the introduction of corrosion inhibitors into pavement deicers using organic acid salts as freezing point depressants, focusing on solving the corrosion of certain metal materials by deicers. CN201110270365.2 discloses a formic acid type snow melting agent, the corrosion inhibition system is composed of silicate, sodium metaaluminate, sodium carbonate and organophosphate containing phosphoryl group, and its airworthiness performance is evaluated according to AMS 1431C.

There are many related patent reports on anti-stripping agents, both amine and non-amine. CN103601392A discloses a long-chain alkyl polyamine series asphalt anti-stripping agent. The raw materials include long-chain alkyl organic acids, epichlorohydrin and organic amines, which not only have good anti-stripping ability, but also have compatibility with asphalt. Good property, easy to dissolve and disperse in asphalt. CN102531445A discloses a non-amine powdery asphalt anti-stripping agent whose main components are sodium lignosulfonate and diatomaceous earth, and the weight ratio of the two components is (4-5):(6-4). The main raw materials of the anti-stripping agent are derived from plant surfactants, which are renewable and have little environmental pollution.

There are many reports of triazine compounds as lubricating anti-wear additives. For example, CN1513961 introduces monothion triazine derivatives extreme pressure anti-wear agents and their preparation methods. The synthesized triazine derivatives containing sulfur and phosphorus can be used as multifunctional lubricant additives, which not only have good anti-wear and anti-extreme pressure properties, but also have anti-corrosion and anti-oxidation properties. However, there are no reports on its use as an anti-stripping agent for asphalt.

There are many reports of a single deicing agent and anti-stripping agent, but the report of a multifunctional agent that integrates a deicing agent and an anti-stripping agent is rare.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a road pavement asphalt deicing and anti-stripping additive with reasonable component collocation, simple preparation process, convenient use and excellent performance in view of the deficiencies of the existing additive functions, which can meet the requirements of asphalt pavement in icy and snowy weather. The invention discloses a road asphalt deicing and anti-stripping additive and a preparation method thereof.

The technical solution for realizing the present invention is as follows, a pavement asphalt deicing and anti-stripping additive comprises the following components by weight:

Deicer 60%-90%;

Anti-stripping agent 5%-35%;

According to the needs of use, one or more of fillers and anti-aging agents can also be added. Generally, the content of the above additives is:

Filler 0.1-5.0%

Anti-aging agent 0.1-5.0%

The above-mentioned deicing agent is one or more of inorganic sodium salts, inorganic potassium salts, inorganic calcium salts, inorganic magnesium salts, and inorganic barium salts modified by organic carboxylic acids.

The above-mentioned anti-stripping agent is a bisaminomonoxanthogen-based s-triazine derivative.

The above-mentioned antiaging agents are benzotriazole-based and benzophenone-based antiaging agents.

The above-mentioned filler is one or more of urea-formaldehyde resin, epoxy resin, terpene resin, rosin-modified resin and octylphenol-formaldehyde resin.

The application of the modified additive of the present invention in pavement asphalt can be added into pavement asphalt in an appropriate proportion, and can be mixed with stones at 180-200 DEG C for uniform paving for road construction.

A preparation method of pavement asphalt deicing anti-stripping additive is as follows

(1) Add deicing agent, organic acid, anti-stripping agent, filler or anti-aging agent to xylene, and stir the reactor at 100-120 ℃ for 2-3 hours;

(2) After the deicing agent modified by the organic acid and the stripping agent are uniformly mixed by vacuum stirring, the temperature is raised to about 160-180 °C, and the stirring reaction is continued for 0.5-1.0 hours;

(3) after stirring, the solvent is evaporated under reduced pressure;

(4) When the solid is formed, use extrusion granulation and sieve to obtain 2-5mm solid type deicing and anti-stripping agent particles.

The beneficial effects of the present invention are that the additive of the present invention can significantly improve the low-temperature deicing, anti-icing and water damage stripping properties of pavement asphalt, and the life of the pavement is prolonged; The present invention does not need special production equipment, has simple production process, and is pollution-free.

Detailed ways

The solutions and effects of the present invention are further described below through specific implementation.

Table 1 composition and content (wt%) of pavement asphalt deicing anti-stripping agent of the present invention

Example 1

97.0g of NaCl, 22.5g of stearic acid, anti-stripping agent 2,4-bis-(di-n-butylamino)-6-isoamylxanthyl-1,3,5-s-triazine, filled with Add 1-3% of rosin denatured resin into xylene, stir the reactor at 100-120 DEG C, and react for 2-3 hours. After the stearic acid-modified sodium chloride deicing agent and the compound triazine anti-stripping agent are uniformly mixed under vacuum. Then the temperature is raised to about 160-180°C, and the stirring reaction is continued for 0.5-1.0 hours. After stirring evenly, the solvent is evaporated under reduced pressure. Stripper particles.

Example 2

97.0g calcium chloride, 45.0g oleic acid, 10.0g anti-stripping agent 2,4-bis-(di-n-octylamino)-6-isoamylxanthyl-1,3,5-s-triazine , 10.0g of filler terpene resin, added to xylene, stirred in the reactor at 100-120 ° C, and reacted for 2-3 hours. The temperature is raised to about 160-180 ° C after vacuum stirring and mixing, and the stirring reaction is continued for 0.5-1.0 hours. After stirring, the solvent is evaporated under reduced pressure. Type deicing anti-stripping agent particles.

Example 3

97.0g calcium chloride, 60.0g oleic acid, 10.0g anti-stripping agent 2,4-bis-(di-n-butylamino)-6-isoamylxanthyl-1,3,5-s-triazine , 1-3% of filler, added to xylene, stirred in the reactor at 100-120 ° C, and reacted for 2-3 hours. After vacuum stirring and mixing evenly. Then the temperature is raised to about 160-180°C, and the stirring reaction is continued for 0.5-1.0 hours. After stirring evenly, the solvent is evaporated under reduced pressure. Stripper particles.

Example 4

97.0g magnesium chloride, 50.0g stearic acid, 6.5g anti-stripping agent 2,4-bis-(dioctylamino)-6-isoamylxanthate-1,3,5-s-triazine 1 -5%, 5.0g of filler urea-formaldehyde resin, added to 200ml of xylene, stirred in a reactor at 100-120°C, and reacted for 2-3 hours. After the additives are stirred and mixed evenly in a vacuum. Then heat up to about 160-180 ° C, continue to stir for 0.5-1.0 hours, after stirring evenly, cool down to 120 ° C, add 2.0g 2-(2H-benzotriazol-2-yl)-4,6-di-tertiary Amylphenol, continue to stir for 1.0 hours, and then evaporate the solvent under reduced pressure. When the solid is formed, use extrusion granulation and sieve to obtain 2-5mm solid type deicing anti-stripping agent particles.

Example 5

100.0g calcium chloride, 50.0g oleic acid, 10.g anti-stripping agent 2,4-bis-(di-n-butylamino)-6-isoamylxanthyl-1,3,5-mesotri oxazine, 5.0 g of octyl phenolic resin as a filler, added to xylene, and reacted for 2-3 hours in a stirring reactor at 100-120°C. After the surface-modified inorganic salt deicing agent and the composite triazine anti-stripping agent are uniformly mixed under vacuum. Then the temperature was raised to about 160-180°C, and the stirring was continued for 0.5-1.0 hours. After stirring evenly, the temperature was lowered to 120°C, 2.0 g of 2-hydroxy-4-methoxybenzophenone was added, and the stirring was continued for 1.0 hours. The solvent is evaporated under pressure, and when the solid is formed, extrusion granulation is adopted, and sieving to obtain 2-5mm solid type deicing and anti-stripping agent particles.

Example 6

For Examples 3 and 5, the CXS-2801 automatic asphalt penetration tester was used to test the penetration of each sample according to the T0604 test method, and the unit was 0.1 mm. The test results are listed in Table 2.

Table 2 Asphalt Penetration Values (0.1mm) of Different Contents of Additives

Example 7

In the SY-2.0C asphalt elongation tester, the ductility value of each sample at 25°C was measured according to the standard test method, the unit was cm, and the tensile speed was 5cm/min. The results are shown in Table 3.

Table 3 Ductility of additives with different contents

Example 8

The softening point of each sample was measured in a CXS-2806 automatic softening point tester according to the T0606 test method. The results are shown in Table 4.

Table 4 Softening point of asphalt with different additive contents

Example 9

Antifreeze test for preparation of additives:

(1) Antifreeze test of additives

Take four beakers and add 3g of sodium chloride, 3.0g of Example 1, 3.0g of Example 5, and a blank test, respectively, and add 100l ml of deionized water. Put it into the freezer area of the refrigerator to freeze, and observe after 24 hours. The result is that the water has completely frozen, and the sodium chloride-containing aqueous solution is basically frozen. Example 1 has more crushed ice, and example 4 has only a thin layer of ice. Floor.

(2) Freezing test of core samples

Put the compacted asphalt pavement core sample into the freezing area of the refrigerator to freeze, and observe its freezing condition after 24 hours. Coagulate a layer of frost. a and b are the freezing conditions in the refrigerator for one day, a is Galorime (synthetic), and b is Galorime, both of which have almost no ice.

Example 10

Anticorrosion test of additives:

Take five jars, add 5g of CaCl ₂ , 5g of Example 1, 5g of Example 4, 5g of Example 4+1% NaOH, and a blank, add 100 ml of deionized water to the five jars, Ultrasonic dispersion, after dissolving, measure the pH value of each solution. Then put the polished rebar into the jar and observe the rust. The results are shown in Table 5.

Table 5 List of corrosion of steel bars by five kinds of solutions

Example 11

According to the design standard of Marshall test mix ratio of asphalt stabilized crushed stone mixture, the oil-stone ratio is 4.8%. It shows that the compacted Marshall specimen meets the requirements.

Example 12

5.0 wt% of each of Examples 1, 2, 3, 4, and 5 was added to the SBS modified asphalt with a whetstone ratio of 4.8%, and the standard Marshall stability test was carried out. According to the Marshall test of the asphalt-stabilized crushed stone mixture Compared with the design standard, the asphalt stability using modified asphalt should not be less than 7.5KN, and the flow value should be in the range of 15-40 (0.1mm). The test data is in line with the standard. The results obtained from the tests are that they are between 11.5-14.8 KN and the flow value is between 23-25 (0.1 mm).

Example 13

5.0 wt% of each of Examples 1, 2, 3, 4, and 5 was added to SBS modified asphalt with a whetstone ratio of 4.8%, and the Marshall stability test was carried out. Both the stability and flow values are increased for the test piece.

The deicing and anti-stripping agent for asphalt pavement in the embodiment of the present invention has no corrosion. When the deicing and anti-stripping agent is added to the asphalt mixture, the anti-freezing ability of the pavement can be increased, the freezing at low temperature can be prevented, and the asphalt pavement can be increased. The anti-stripping properties of the asphalt pavement can be extended.

Claims (1)

1. A pavement asphalt deicing anti-stripping additive, characterized in that the additive comprises the following components by weight: Deicer 60%-90%; Anti-stripping agent 5%-35%; According to the needs of use, one or more of fillers and antiaging agents are also added, and the contents of the fillers and antiaging agents are: Filler 0.1-5.0%; Anti-aging agent 0.1-5.0%; The deicing agent is one or more of inorganic sodium salts, inorganic potassium salts, inorganic calcium salts, inorganic magnesium salts, and inorganic barium salts modified by organic carboxylic acids; The anti-stripping agent is a bisaminomonoxanthogen s-triazine derivative; The antiaging agent is a benzotriazole or benzophenone antiaging agent; The filler is one or more of urea-formaldehyde resin, epoxy resin, terpene resin, rosin-modified resin and octyl phenolic resin; The preparation method of the additive is as follows (1) Add deicing agent, organic acid, anti-stripping agent, filler or anti-aging agent to xylene, and stir the reactor at 100-120 ℃ for 2-3 hours; (2) After the deicing agent modified by the organic acid and the stripping agent are uniformly mixed by vacuum stirring, the temperature is raised to about 160-180 °C, and the stirring reaction is continued for 0.5-1.0 hours; (3) after stirring, the solvent is evaporated under reduced pressure; (4) when solid is formed, adopt extrusion granulation, and sieve to obtain 2-5mm solid type deicing anti-stripping agent particles; The application of the additive in pavement asphalt is added to pavement asphalt in a proportion of 10%, and can be mixed with stones at 180-200 DEG C for uniform paving for road construction.