CN103205130B - Energy-saving and environment-friendly asphalt modifier - Google Patents

Abstract

The invention belongs to the field of asphalt modification and provides an energy-saving and environment-friendly asphalt modifier, which consists of the following raw materials in parts by weight: 100 parts of water, 8-18 parts of sodium stearate, and 8-18 parts of sodium oleate , 2-4 parts or 10-15 parts of palmitic acid, 2-8 parts of sodium lauryl sulfate, 4-10 parts of cetyltrimethylammonium bromide, 0 parts or 2-8 parts of sodium fatty alcohol sulfate share. For base asphalt, SBS modified asphalt and rubber asphalt, there are specific and preferred formulas and dosages. The asphalt modifier can improve the fluidity of the asphalt, and can reduce the construction temperature of the asphalt under the same fluidity, save energy, have less polluting gas emissions during the construction process, and have good environmental protection performance. It can also improve the service performance of the asphalt mixture. The anti-rutting performance at high temperature is basically the same as that before it is used. It meets the working conditions, and the low-temperature cracking resistance and water stability are significantly improved.

Description

An energy-saving and environment-friendly asphalt modifier

technical field

The invention belongs to the field of asphalt modification, and relates to an asphalt modifier, which is an energy-saving and environment-friendly asphalt modifier.

Background technique

my country's expressway industry has developed rapidly, especially during the "Eleventh Five-Year Plan" period, when the expressway network has been basically formed. During the "Twelfth Five-Year Plan" period, my country's expressway network will be further expanded. Due to the many advantages of asphalt pavement, from the perspective of pavement structure, most highways use asphalt pavement. At present, for the paving method of asphalt pavement, the method of hot mix and hot paving (HMA) is often used in China. This method usually heats the asphalt to 150-160°C, heats the mineral aggregate to 165-175°C, and then heats the asphalt at 150-175°C. Mix at a temperature of ~160°C. If modified asphalt is used, the temperature needs to be increased by about 20°C to 30°C. Such a high temperature will cause the asphalt pavement to emit a large amount of gas and dust such as CO ₂ , CO, SO ₂ and NO _x during construction, and consume more energy in the production of asphalt mixture, which will aggravate the damage to the environment And the consumption of non-renewable resources, such a situation is definitely not in line with the concept of sustainable development. In addition, urban roads are generally constructed at night due to the heavy traffic volume during the day. For example, in cold regions and plateau regions, the ambient temperature is relatively low. Under the condition of low ambient temperature, it is necessary to pay a higher construction temperature. cost. Therefore, using an asphalt modifier to reduce the construction temperature of asphalt pavement can effectively alleviate the above shortcomings, and at the same time improve some performance of asphalt mixture.

Contents of the invention

In view of the deficiencies in the prior art, the object of the present invention is to provide an energy-saving and environment-friendly asphalt modifier, which can effectively reduce the construction temperature of asphalt mixture, reduce the emission of polluting gases and energy consumption, and improve the Performance of asphalt mixture.

In order to realize above-mentioned task, the present invention adopts following technical scheme to realize:

An energy-saving and environment-friendly asphalt modifier, which consists of the following raw materials in parts by weight: 100 parts of water, 8-18 parts of sodium stearate, 8-18 parts of sodium oleate, 2-4 parts of palmitic acid or 10 ～15 parts, 2～8 parts of sodium lauryl sulfate, 4～10 parts of cetyltrimethylammonium bromide, 0 part or 2～8 parts of fatty alcohol sodium sulfate.

The preferred energy-saving and environment-friendly asphalt modifier suitable for base asphalt is composed of the following raw materials in parts by weight: 100 parts of water, 10-15 parts of sodium stearate, 10-15 parts of sodium oleate, and 10 parts of palmitic acid ～15 parts, 4～8 parts of sodium lauryl sulfate, 8～10 parts of hexadecyltrimethylammonium bromide.

The preferred energy-saving and environment-friendly asphalt modifier suitable for SBS modified asphalt is composed of the following raw materials in parts by weight: 100 parts of water, 8-10 parts of sodium stearate, 8-10 parts of sodium oleate, sixteen 10-15 parts of acid, 4-8 parts of sodium lauryl sulfate, 4-8 parts of cetyltrimethylammonium bromide, 4-8 parts of fatty alcohol sodium sulfate.

The preferred energy-saving and environment-friendly asphalt modifier suitable for rubber asphalt is composed of the following raw materials in parts by weight: 100 parts of water, 15-18 parts of sodium stearate, 15-18 parts of sodium oleate, 2 hexadecanoic acid ～4 parts, 2～4 parts of sodium lauryl sulfate, 8～10 parts of cetyltrimethylammonium bromide, 2～4 parts of fatty alcohol sodium sulfate.

The dosage of energy-saving and environment-friendly asphalt modifier suitable for base asphalt is 4% to 5% of the weight of base asphalt.

The dosage of the energy-saving and environment-friendly asphalt modifier suitable for SBS modified asphalt is 3% to 5% of the weight of SBS modified asphalt.

The dosage of energy-saving and environment-friendly asphalt modifier suitable for rubber asphalt is 4% to 5% of the weight of rubber asphalt.

Compared with the prior art, the present invention has beneficial technical effects as follows:

(1) The energy-saving and environment-friendly asphalt modifier of the present invention can reduce the high-temperature viscosity of asphalt, improve the fluidity of asphalt, and can reduce the construction temperature of asphalt under the same fluidity, save energy, and lower construction temperature. Low emission of medium-pollution gas and good environmental performance. When the energy-saving and environment-friendly asphalt modifier of the present invention is used in base asphalt, the construction temperature can be reduced by 10°C; when it is used in SBS modified asphalt, the construction temperature can be reduced by 20°C; when it is used in rubber asphalt, the construction temperature can be reduced by 25°C;

(2) The energy-saving and environment-friendly asphalt modifier of the present invention can improve the service performance of asphalt mixture, the anti-rutting performance at high temperature is basically the same as that before use, meets the working conditions, and the low-temperature cracking resistance and water stability are significantly improved . After the base asphalt is added with the modifier, its low-temperature cracking resistance is increased by 15% to 20%, and its water stability is increased by 3% to 5%. After the SBS modified asphalt is added with the modifier, its low-temperature cracking resistance is increased by 8%. ~10%, the water stability performance is increased by 4% to 5%; after the rubber asphalt mixture is added with the modifier, its low temperature cracking resistance performance is increased by 10% to 12%, and the water stability performance is increased by 3% to 4%.

Detailed ways

Following the above-mentioned technical scheme, the following examples provide an energy-saving and environment-friendly asphalt modifier, which consists of the following raw materials in parts by weight: 100 parts of water, 8 to 18 parts of sodium stearate, and 8 to 18 parts of sodium oleate 2-4 parts or 10-15 parts of palmitic acid, 2-8 parts of sodium lauryl sulfate, 4-10 parts of cetyltrimethylammonium bromide, 0 parts or 2-10 parts of sodium fatty alcohol sulfate 8 servings.

The preferred energy-saving and environment-friendly asphalt modifier suitable for base asphalt is composed of the following raw materials in parts by weight: 100 parts of water, 10-15 parts of sodium stearate, 10-15 parts of sodium oleate, and 10 parts of palmitic acid ～15 parts, 4～8 parts of sodium lauryl sulfate, 8～10 parts of hexadecyltrimethylammonium bromide.

The preferred energy-saving and environment-friendly asphalt modifier suitable for SBS modified asphalt is composed of the following raw materials in parts by weight: 100 parts of water, 8-10 parts of sodium stearate, 8-10 parts of sodium oleate, sixteen 10-15 parts of acid, 4-8 parts of sodium lauryl sulfate, 4-8 parts of cetyltrimethylammonium bromide, 4-8 parts of fatty alcohol sodium sulfate.

The preferred energy-saving and environment-friendly asphalt modifier suitable for rubber asphalt is composed of the following raw materials in parts by weight: 100 parts of water, 15-18 parts of sodium stearate, 15-18 parts of sodium oleate, 2 hexadecanoic acid ～4 parts, 2～4 parts of sodium lauryl sulfate, 8～10 parts of cetyltrimethylammonium bromide, 2～4 parts of fatty alcohol sodium sulfate.

The dosage of energy-saving and environment-friendly asphalt modifier suitable for base asphalt is 4% to 5% of the weight of base asphalt.

The dosage of the energy-saving and environment-friendly asphalt modifier suitable for SBS modified asphalt is 3% to 5% of the weight of SBS modified asphalt.

The dosage of energy-saving and environment-friendly asphalt modifier suitable for rubber asphalt is 4% to 5% of the weight of rubber asphalt.

Specific embodiments of the present invention are provided below, and it should be noted that the present invention is not limited to the following specific embodiments, and all equivalent transformations done on the basis of the technical solutions of the present application all fall within the scope of protection of the present invention.

Example 1:

An energy-saving and environment-friendly asphalt modifier suitable for base asphalt, which consists of the following raw materials in parts by weight: 100 parts of water, 10 parts of sodium stearate, 10 parts of sodium oleate, 10 parts of palmitic acid, and 10 parts 4 parts of sodium dialkyl sulfate, 8 parts of cetyltrimethyl ammonium bromide.

The asphalt modifier of the present embodiment is prepared according to the following steps:

(1) Add 100g of water into a clean container and heat it to about 50°C;

(2) In the above hot water, add the constituent substances in sequence according to the above quantities;

(3) Keep the temperature at about 50°C, stir with a glass rod to dissolve, and mix well;

(4) Cool at room temperature to prepare modifier.

Add 4% by weight of the above-mentioned asphalt modifier to SK90# base asphalt. After mixing evenly, refer to my country's "Test Regulations for Asphalt and Asphalt Mixtures in Highway Engineering" (JTJ052-2000). , using American Brookfield-RVDV-Ⅱ+ Brookfield rotational viscometer to test the viscosity of asphalt, the test results are shown in Table 1. From the test results in Table 1, it can be seen that the addition of 4% modifier by weight effectively reduces the viscosity of SK90# The viscosity of base asphalt, after adding modifier, the viscosity at 140°C is close to the viscosity at 150°C without adding modifier.

Prepare the asphalt mixture:

raw material:

Asphalt: SK90# base asphalt

Mineral materials: basalt, limestone mineral powder

Modifier dosage: 4% (ie weight of modifier: weight of SK90# base asphalt)

Mineral material gradation: AC-13 type

Asphalt ratio: 4.4% (ie SK90# matrix asphalt weight: aggregate weight)

The steps for preparing asphalt mixture are as follows:

(1) SK90# matrix asphalt is heated to about 140°C, and the mineral aggregate is heated to 140°C to 150°C;

(2) Add 4% modifier to the asphalt in step (1) and stir to melt;

(3) Add the mineral material of step (1) into the mixing pot and stir for 60 seconds, add the asphalt of step (2) and stir for 90 seconds after stirring, and finally add filler and stir for 60 seconds to make an asphalt mixture.

Referring to my country's "Test Regulations for Asphalt and Asphalt Mixtures in Highway Engineering" (JTJ052-2000), after the asphalt is added with modifiers, the YLDCZ-8S automatic rutting tester is used to test the high-temperature rutting resistance of asphalt mixtures, and the LETRY electro-hydraulic servo fatigue tester is used to test the asphalt mixture. The low-temperature cracking resistance of asphalt mixture was tested by machine, and the water stability of asphalt mixture was tested by AMS-C automatic Marshall tester. The performance test results of asphalt mixture are shown in Table 2, Table 3 and Table 4. From the test results in the table, it can be concluded that after adding 4% modifier, the high temperature anti-rutting performance of SK90# asphalt mixture is the same as that without When the modifier is added, it is close to meet the requirements of the working conditions, while the maximum bending and tensile strain energy at low temperature is increased by 19%, and the vacuum saturated Marshall stability is increased by 3.5%.

Example 2:

An energy-saving and environment-friendly asphalt modifier suitable for base asphalt, which consists of the following raw materials in parts by weight: 100 parts of water, 12 parts of sodium stearate, 12 parts of sodium oleate, 12 parts of palmitic acid, dodecanoic acid 6 parts of sodium alkyl sulfate, 10 parts of cetyltrimethyl ammonium bromide.

The preparation method of the asphalt modifier of this embodiment is the same as that of Embodiment 1.

Add 4% of the above-mentioned asphalt modifier to SK90# base asphalt, and the tested viscosity is shown in Table 1. From the test results in Table 1, it can be seen that adding 4% of the modifier effectively reduces the viscosity of SK90# The viscosity of asphalt, after adding the modifier, the viscosity at 140°C is about 20cp lower than the viscosity at 150°C without adding the modifier.

Prepare the asphalt mixture:

raw material:

Asphalt: SK90# base asphalt

Mineral materials: basalt, limestone mineral powder

Modifier dosage: 4% (ie weight of modifier: weight of SK90# base asphalt)

Mineral material gradation: AC-13 type

Asphalt ratio: 4.4% (ie SK90# matrix asphalt weight: aggregate weight)

The preparation method of the asphalt mixture of this embodiment is the same as that of Embodiment 1.

The test method of each performance of the present embodiment is all the same with embodiment 1.

The performance test results of asphalt mixture are shown in Table 2, Table 3 and Table 4. From the test results in the table, it can be concluded that after adding modifier, the high-temperature anti-rutting performance of SK90# asphalt mixture is the same as that without modification The maximum bending and tensile strain at low temperature is increased by 20.5%, and the vacuum saturated Marshall stability is increased by 4.1%.

Example 3:

An energy-saving and environment-friendly asphalt modifier suitable for base asphalt, which consists of the following raw materials in parts by weight: 100 parts of water, 15 parts of sodium stearate, 15 parts of sodium oleate, 15 parts of palmitic acid, dodecanoic acid 8 parts of sodium alkyl sulfate, 10 parts of cetyltrimethyl ammonium bromide.

The preparation method of the asphalt modifier of this embodiment is the same as that of Embodiment 1.

Add 4% of the above-mentioned asphalt modifier to SK90# base asphalt, and the tested viscosity is shown in Table 1. From the test results in Table 1, it can be seen that adding 4% of the modifier effectively reduces the viscosity of SK90# The viscosity of asphalt, after adding the modifier, the viscosity at 140°C is slightly higher than the viscosity at 150°C without adding the modifier by about 7.5cp.

Prepare the asphalt mixture:

raw material:

Asphalt: SK90# base asphalt

Mineral materials: basalt, limestone mineral powder

Modifier dosage: 4% (ie weight of modifier: weight of SK90# base asphalt)

Mineral material gradation: AC-13 type

Asphalt ratio: 4.4% (ie SK90# matrix asphalt weight: aggregate weight)

The preparation method of the asphalt mixture of this embodiment is the same as that of Embodiment 1.

The test method of each performance of the present embodiment is all the same with embodiment 1.

The performance test results of asphalt mixture are shown in Table 2, Table 3 and Table 4. From the test results in the table, it can be concluded that after adding modifier, the high-temperature anti-rutting performance of SK90# asphalt mixture is the same as that without modification The maximum bending and tensile strain at low temperature is increased by 16.6%, and the vacuum saturated Marshall stability is increased by 5.3%.

The amount of the modifier in Example 1, Example 2 and Example 3 is 4% to 5% of the weight of the base asphalt. In view of the length of the paper, no specific examples will be given one by one. Only the modified The dosage of the agent is 4% of the weight of the base asphalt as an example to illustrate.

Example 4:

An energy-saving and environment-friendly asphalt modifier suitable for SBS modified asphalt, which consists of the following raw materials in parts by weight: 100 parts of water, 8 parts of sodium stearate, 8 parts of sodium oleate, 10 parts of palmitic acid, 4 parts of sodium lauryl sulfate, 4 parts of cetyl tricresyl ammonium bromide, 4 parts of sodium fatty alcohol sulfate.

The preparation method of the asphalt modifier of this embodiment is the same as that of Embodiment 1.

Add 4% of the above-mentioned asphalt modifier to the SBS modified asphalt, and the tested viscosity is shown in Table 1. From the test results in Table 1, it can be seen that adding 4% of the modifier effectively reduces the SBS modified asphalt. Viscosity of bitumen.

Prepare the asphalt mixture:

raw material:

Asphalt: SBS modified asphalt

Mineral materials: basalt, limestone mineral powder

Modifier content: 4% (ie weight of modifier: weight of SBS modified asphalt)

Mineral material gradation: AC-13 type

Asphalt ratio: 4.6% (that is, the weight of SBS modified asphalt: the weight of aggregate)

The steps for preparing asphalt mixture are as follows:

(1) SBS modified asphalt is heated to about 160°C, and mineral aggregate is heated to 160°C to 170°C;

(2) Add 4% modifier to the asphalt in step (1) and stir to melt;

(3) Add the mineral material of step (1) into the mixing pot and stir for 60 seconds, add the asphalt of step (2) and stir for 90 seconds after stirring, and finally add filler and stir for 60 seconds to make SBS modified asphalt mixture.

The test method of each performance of the present embodiment is all the same with embodiment 1.

The performance test results of asphalt mixture are shown in Table 2, Table 3 and Table 4. From the test results in the table, it can be concluded that after adding modifier, the high temperature rutting resistance performance of SBS modified asphalt mixture is slightly lower than that of adding modifier. The modifier is close to that of the working conditions, and the maximum bending and tensile strain at low temperature is increased by 8.9%, and the vacuum saturated Marshall stability is increased by 4.3%.

Example 5:

An energy-saving and environment-friendly asphalt modifier suitable for SBS modified asphalt, which consists of the following raw materials in parts by weight: 100 parts of water, 10 parts of sodium stearate, 10 parts of sodium oleate, 12 parts of palmitic acid, 6 parts of sodium lauryl sulfate, 6 parts of cetyl tricresyl ammonium bromide, 6 parts of sodium fatty alcohol sulfate.

The preparation method of the asphalt modifier of this embodiment is the same as that of Embodiment 1.

Add 4% of the above-mentioned asphalt modifier to the SBS modified asphalt, and the tested viscosity is shown in Table 1. From the test results in Table 1, it can be seen that adding 4% of the modifier effectively reduces the SBS modified asphalt. Viscosity of bitumen.

Prepare the asphalt mixture:

raw material:

Asphalt: SBS modified asphalt

Mineral materials: basalt, limestone mineral powder

Modifier content: 4% (ie weight of modifier: weight of SBS modified asphalt)

Mineral material gradation: AC-13 type

Asphalt ratio: 4.6% (that is, the weight of SBS modified asphalt: the weight of aggregate)

The steps for preparing the asphalt mixture in this embodiment are the same as those in Embodiment 4.

The test method of each performance of the present embodiment is all the same with embodiment 1.

The performance test results of asphalt mixture are shown in Table 2, Table 3 and Table 4. From the test results in the table, it can be concluded that after adding modifier, the high temperature rutting resistance performance of SBS modified asphalt mixture is slightly lower than that of adding modifier. Modifier is close, but the maximum bending and tensile strain at low temperature is increased by 9.9%, and the vacuum saturated Marshall stability is increased by 5.1%.

Embodiment 6:

An energy-saving and environment-friendly asphalt modifier suitable for SBS modified asphalt, which consists of the following raw materials in parts by weight: 100 parts of water, 10 parts of sodium stearate, 10 parts of sodium oleate, 15 parts of palmitic acid, 8 parts of sodium lauryl sulfate, 8 parts of cetyl tricresyl ammonium bromide, 8 parts of fatty alcohol sodium sulfate.

The preparation method of the asphalt modifier of this embodiment is the same as that of Embodiment 1.

Add 4% of the above-mentioned asphalt modifier to the SBS modified asphalt, and the tested viscosity is shown in Table 1. From the test results in Table 1, it can be seen that adding 4% of the modifier effectively reduces the SBS modified asphalt. Viscosity of bitumen.

Prepare the asphalt mixture:

raw material:

Asphalt: SBS modified asphalt

Mineral materials: basalt, limestone mineral powder

Modifier content: 4% (ie weight of modifier: weight of SBS modified asphalt)

Mineral material gradation: AC-13 type

Asphalt ratio: 4.6% (that is, the weight of SBS modified asphalt: the weight of aggregate)

The steps for preparing the asphalt mixture in this embodiment are the same as those in Embodiment 4.

The test method of each performance of the present embodiment is all the same with embodiment 1.

The performance test results of asphalt mixture are shown in Table 2, Table 3 and Table 4. From the test results in the table, it can be concluded that after adding modifier, the high temperature rutting resistance performance of SBS modified asphalt mixture is slightly lower than that of adding modifier. Modifiers are close to each other, but the maximum bending and tensile strain at low temperature is increased by 9.1%, and the vacuum saturated Marshall stability is increased by 5.2%.

The dosage of modifier in embodiment 4, embodiment 5 and embodiment 6 is 3%～5% of SBS modified asphalt weight, in view of the space is too long, no longer give specific embodiment one by one, only with The amount of modifier is 4% of the weight of SBS modified asphalt as an example to illustrate.

Embodiment 7:

An energy-saving and environment-friendly asphalt modifier suitable for rubber asphalt, which is composed of the following raw materials in parts by weight: 100 parts of water, 15 parts of sodium stearate, 15 parts of sodium oleate, 2 parts of palmitic acid, lauryl 2 parts of sodium alkyl sulfate, 8 parts of cetyltrimethyl ammonium bromide, 2 parts of fatty alcohol sodium sulfate.

The preparation method of the asphalt modifier of this embodiment is the same as that of Embodiment 1.

Add 4% of the above-mentioned asphalt modifier to the rubber asphalt, and the test viscosity is shown in Table 1. From the test results in Table 1, it can be seen that adding 4% of the modifier effectively reduces the viscosity of the rubber asphalt .

Prepare the asphalt mixture:

raw material:

Asphalt: SK90# base asphalt

Rubber powder: 40 mesh, dosage 22% (that is, rubber powder weight: SK90# asphalt weight)

Mineral materials: basalt, limestone mineral powder

Modifier content: 4% (ie weight of modifier: weight of rubber asphalt)

Mineral material gradation: AR-SMA-13 type

Asphalt ratio: 7.2% (that is, rubber asphalt weight: aggregate weight)

The steps for preparing asphalt mixture are as follows:

(1) SK90# matrix asphalt is heated to 180°C-200°C, and mineral aggregate is heated to 160°C-170°C;

(2) Weigh 22% of 40-mesh rubber powder and add it to the asphalt in step (1) in batches, keep the temperature at 180°C-200°C and shear at high speed for 1-1.5 hours to make rubber asphalt;

(3) Add 4% modifier to the rubber asphalt in step (2) and stir to melt;

(4) Add the mineral material of step (1) into the mixing pot and stir for 60s, add the rubber asphalt of step (2) and stir for 90s after stirring, and finally add filler and stir for 60s to make rubber asphalt mixture.

The test method of each performance of the present embodiment is all the same with embodiment 1.

The performance test results of asphalt mixture are shown in Table 2, Table 3 and Table 4. From the test results in the table, it can be concluded that after adding modifiers, the high temperature rutting resistance performance and water stability performance of rubber asphalt mixture are the same as those without When modifier is added, it is close to meet the requirements of working conditions, and the maximum bending and tensile strain at low temperature is increased by 12.5%.

Embodiment 8:

An energy-saving and environment-friendly asphalt modifier suitable for rubber asphalt, which consists of the following raw materials in parts by weight: 100 parts of water, 16 parts of sodium stearate, 16 parts of sodium oleate, 3 parts of palmitic acid, dodecanoic acid 3 parts of sodium alkyl sulfate, 9 parts of cetyltrimethyl ammonium bromide, 3 parts of fatty alcohol sodium sulfate.

The preparation method of the asphalt modifier of this embodiment is the same as that of Embodiment 1.

Add 4% of the above-mentioned asphalt modifier to the rubber asphalt, and the test viscosity is shown in Table 1. From the test results in Table 1, it can be seen that adding 4% of the modifier effectively reduces the viscosity of the rubber asphalt .

Prepare the asphalt mixture:

raw material:

Asphalt: SK90# base asphalt

Rubber powder: 40 mesh, dosage 22% (that is, rubber powder weight: SK90# asphalt weight)

Mineral materials: basalt, limestone mineral powder

Modifier content: 4% (ie weight of modifier: weight of rubber asphalt)

Mineral material gradation: AR-SMA-13 type

Asphalt ratio: 7.2% (that is, rubber asphalt weight: aggregate weight)

The steps for preparing the asphalt mixture in this embodiment are the same as those in Embodiment 7.

The test method of each performance of the present embodiment is all the same with embodiment 1.

The performance test results of asphalt mixture are shown in Table 2, Table 3 and Table 4. From the test results in the table, it can be concluded that after adding modifier, the high temperature rutting resistance performance of rubber asphalt mixture is the same as that without modifier The maximum bending and tensile strain at low temperature increased by 15.2%, and the vacuum saturated Marshall stability increased by 0.7%.

Embodiment 9:

An energy-saving and environment-friendly asphalt modifier suitable for rubber asphalt, which consists of the following raw materials in parts by weight: 100 parts of water, 18 parts of sodium stearate, 18 parts of sodium oleate, 4 parts of palmitic acid, dodecanoic acid 4 parts of sodium alkyl sulfate, 10 parts of cetyltrimethyl ammonium bromide, 4 parts of sodium fatty alcohol sulfate.

The preparation method of the asphalt modifier of this embodiment is the same as that of Embodiment 1.

Add 4% of the above-mentioned asphalt modifier to the rubber asphalt, and the test viscosity is shown in Table 1. From the test results in Table 1, it can be seen that adding 4% of the modifier effectively reduces the viscosity of the rubber asphalt .

Prepare the asphalt mixture:

raw material:

Asphalt: SK90# base asphalt

Rubber powder: 40 mesh, dosage 22% (that is, rubber powder weight: SK90# asphalt weight)

Mineral materials: basalt, limestone mineral powder

Modifier content: 4% (ie weight of modifier: weight of rubber asphalt)

Mineral material gradation: AR-SMA-13 type

Asphalt ratio: 7.2% (that is, rubber asphalt weight: aggregate weight)

The steps for preparing the asphalt mixture in this embodiment are the same as those in Embodiment 7.

The test method of each performance of the present embodiment is all the same with embodiment 1.

The performance test results of asphalt mixture are shown in Table 2, Table 3 and Table 4. From the test results in the table, it can be concluded that the high-temperature anti-rutting performance of rubber asphalt mixture is close to that without modifier, which meets the working condition Demand, while the maximum bending and tensile strain at low temperature increased by 8.6%, and the vacuum saturated Marshall stability increased by 1.4%.

The amount of the modifier in Example 7, Example 8 and Example 9 is 4% to 5% of the weight of the rubber asphalt. In view of the length of the paper, no specific examples are given one by one. Only the modified The dosage of the agent is 4% of the rubber asphalt weight as an example to illustrate.

The above implementation examples prove that the asphalt modifier involved in the present invention can reduce the high-temperature viscosity of asphalt, so as to achieve the purpose of lowering the construction temperature, energy saving and environmental protection. The performance of the asphalt mixture after adding the modifier is close to that of the traditional hot mix asphalt mixture, and some performances can be improved.

Table 1 adds modifier and the viscosity test result without modifier

Table 2 Test results of high temperature anti-rutting performance of asphalt mixture

Table 3 Test results of asphalt mixture anti-cracking performance at low temperature

Table 4 Test results of water stability performance of asphalt mixture

Claims (7)

1. an energy-conserving and environment-protective asphalt modifier, it is characterized in that, with weight parts, be made up of following raw material: 100 parts, water, sodium stearate 8 ~ 18 parts, sodium oleate 8 ~ 18 parts, palmitic acid 2 ~ 4 parts or 10 ~ 15 parts, sodium lauryl sulphate 2 ~ 8 parts, cetyl trimethylammonium bromide 4 ~ 10 parts, sodium alkyl sulfate 0 part or 2 ~ 8 parts.

2. energy-conserving and environment-protective asphalt modifier as claimed in claim 1, it is characterized in that, be applicable to the energy-conserving and environment-protective asphalt modifier of matrix pitch, with weight parts, be made up of following raw material: 100 parts, water, sodium stearate 10 ~ 15 parts, sodium oleate 10 ~ 15 parts, palmitic acid 10 ~ 15 parts, sodium lauryl sulphate 4 ~ 8 parts, cetyl trimethylammonium bromide 8 ~ 10 parts.

3. energy-conserving and environment-protective asphalt modifier as claimed in claim 1, it is characterized in that, be applicable to the energy-conserving and environment-protective asphalt modifier of SBS modifying asphalt, with weight parts, be made up of following raw material: 100 parts, water, sodium stearate 8 ~ 10 parts, sodium oleate 8 ~ 10 parts, palmitic acid 10 ~ 15 parts, sodium lauryl sulphate 4 ~ 8 parts, cetyl trimethylammonium bromide 4 ~ 8 parts, sodium alkyl sulfate 4 ~ 8 parts.

4. energy-conserving and environment-protective asphalt modifier as claimed in claim 1, it is characterized in that, be applicable to the energy-conserving and environment-protective asphalt modifier of rubber asphalt, with weight parts, be made up of following raw material: 100 parts, water, sodium stearate 15 ~ 18 parts, sodium oleate 15 ~ 18 parts, palmitic acid 2 ~ 4 parts, sodium lauryl sulphate 2 ~ 4 parts, cetyl trimethylammonium bromide 8 ~ 10 parts, sodium alkyl sulfate 2 ~ 4 parts.

5. energy-conserving and environment-protective asphalt modifier as claimed in claim 2, is characterized in that, be applicable to the use volume of the energy-conserving and environment-protective asphalt modifier of matrix pitch for 4% ~ 5% of matrix pitch weight.

6. energy-conserving and environment-protective asphalt modifier as claimed in claim 3, is characterized in that, be applicable to the use volume of the energy-conserving and environment-protective asphalt modifier of SBS modifying asphalt for 3% ~ 5% of SBS modifying asphalt weight.

7. energy-conserving and environment-protective asphalt modifier as claimed in claim 4, is characterized in that, be applicable to the use volume of the energy-conserving and environment-protective asphalt modifier of rubber asphalt for 4% ~ 5% of rubber asphalt weight.