A kind of road asphalt modifier and preparation method thereof

Abstract

A road asphalt modifier, the modifier is an organic montmorillonite, that is, an organic-inorganic composite material with a core-shell structure formed by coating polyphosphate amine salt on the surface of montmorillonite particles. The weight content of each substance is as follows: montmorillonite: 10%-25%, polyphosphoric acid: 20%-40%, amines: 35%-55%. This kind of organic montmorillonite with a core-shell structure prepared by generating chemical bonds on the surface of micron-sized montmorillonite particles to coat polyphosphate amine salt improves the penetration of montmorillonite inorganic powder particles in asphalt. Dispersion and uniformity can improve the rheological properties and anti-aging properties of asphalt.

Description

technical field

[0001] The invention belongs to the technical field of modified asphalt, and in particular relates to a road asphalt modifier and a preparation method thereof. Background technique

[0002] Asphalt pavement has become the preferred pavement type for high-grade highways in various countries because of its excellent road performance. However, asphalt is an organic material, which is very susceptible to thermal oxygen and photo-oxidative aging under the influence of high temperature and ultraviolet radiation, which makes the asphalt hard and brittle, resulting in cracks, ruts, potholes, spalling and other diseases on the asphalt pavement. The disease seriously affects the road performance and service life of asphalt.

[0003] Layered silicates can endow polymers with good thermal stability, flame retardancy, barrier properties, electrical conductivity and controllable thermal expansion, etc., and have become the main means of high performance and functionalizat...

Examples

Embodiment 1

[0027] Preparation of organic montmorillonite:

[0028] Among them, the content of montmorillonite in montmorillonite is more than 97%, and its particle size is 10um. Polyphosphoric acid has a degree of polymerization of 100.

[0029] (1) Under the condition of high-speed stirring (1500r / min), quickly add montmorillonite to polyphosphoric acid ethanol solution, keep stirring for 20 minutes, and filter with suction.

[0030] (2) Add the dodecylamine ethanol solution to the filter cake in step (1), stir for 1 hour after the addition, and filter with suction.

[0031] (3) Washing and vacuum drying to finally obtain organic montmorillonite with good particle dispersion, fluffy and no need for grinding.

[0032] Wherein, wherein the weight content of each substance is:

[0033] Montmorillonite: 25%

[0034] Polyphosphoric acid: 25%

[0035] Dodecylamine: 50%

[0036] The preparation of organic montmorillonite modified asphalt is as follows:

[0037] The organic montmorilloni...

Embodiment 2

[0039] Preparation of organic montmorillonite:

[0040] Among them, the content of montmorillonite in montmorillonite is more than 97%, and its particle size is 10um. Polyphosphoric acid has a degree of polymerization of 100.

[0041] (1) Under the condition of high-speed stirring (1500r / min), quickly add montmorillonite to polyphosphoric acid ethanol solution, keep stirring for 20 minutes, and filter with suction.

[0042] (2) Add cetylamine ethanol solution to the filter cake in step (1), stir for 1 hour after the addition is complete, and filter with suction.

[0043] (3) Washing and vacuum drying to finally obtain organic montmorillonite with good particle dispersion, fluffy and no need for grinding.

[0044] Wherein, wherein the weight content of each substance is:

[0045] Montmorillonite: 25%

[0046] Polyphosphoric acid: 30%

[0047] Cetylamine: 45%

[0048] The preparation of organic montmorillonite modified asphalt is as follows:

[0049] The organic montmoril...

Embodiment 3

[0051] Preparation of organic montmorillonite:

[0052] Among them, the content of montmorillonite in montmorillonite is more than 97%, and its particle size is 10um. Polyphosphoric acid has a degree of polymerization of 100.

[0053] (1) Under the condition of high-speed stirring (1500r / min), quickly add montmorillonite to polyphosphoric acid ethanol solution, keep stirring for 20 minutes, and filter with suction.

[0054] (2) Add the stearylamine ethanol solution to the filter cake in step (1), stir for 1 hour after the addition, and filter with suction.

[0055] (3) Washing and vacuum drying to finally obtain organic montmorillonite with good particle dispersion, fluffy and no need for grinding.

[0056] Wherein, wherein the weight content of each substance is:

[0057] Montmorillonite: 25%

[0058] Polyphosphoric acid: 35%

[0059] Octadecylamine: 45%

[0060] The preparation of organic montmorillonite modified asphalt is as follows:

[0061] The organic montmorilloni...

technical field

[0001] The invention belongs to the technical field of modified asphalt, and in particular relates to a road asphalt modifier and a preparation method thereof. Background technique

[0002] Asphalt pavement has become the preferred pavement type for high-grade highways in various countries because of its excellent road performance. However, asphalt is an organic material, which is very susceptible to thermal oxygen and photo-oxidative aging under the influence of high temperature and ultraviolet radiation, which makes the asphalt hard and brittle, resulting in cracks, ruts, potholes, spalling and other diseases on the asphalt pavement. The disease seriously affects the road performance and service life of asphalt.

[0003] Layered silicates can endow polymers with good thermal stability, flame retardancy, barrier properties, electrical conductivity and controllable thermal expansion, etc., and have become the main means of high performance and functionalizat...

Examples

Embodiment 1

[0027] Preparation of organic montmorillonite:

[0028] Among them, the content of montmorillonite in montmorillonite is more than 97%, and its particle size is 10um. Polyphosphoric acid has a degree of polymerization of 100.

[0029] (1) Under the condition of high-speed stirring (1500r / min), quickly add montmorillonite to polyphosphoric acid ethanol solution, keep stirring for 20 minutes, and filter with suction.

[0030] (2) Add the dodecylamine ethanol solution to the filter cake in step (1), stir for 1 hour after the addition, and filter with suction.

[0031] (3) Washing and vacuum drying to finally obtain organic montmorillonite with good particle dispersion, fluffy and no need for grinding.

[0032] Wherein, wherein the weight content of each substance is:

[0033] Montmorillonite: 25%

[0034] Polyphosphoric acid: 25%

[0035] Dodecylamine: 50%

[0036] The preparation of organic montmorillonite modified asphalt is as follows:

[0037] The organic montmorilloni...

Embodiment 2

[0039] Preparation of organic montmorillonite:

[0040] Among them, the content of montmorillonite in montmorillonite is more than 97%, and its particle size is 10um. Polyphosphoric acid has a degree of polymerization of 100.

[0041] (1) Under the condition of high-speed stirring (1500r / min), quickly add montmorillonite to polyphosphoric acid ethanol solution, keep stirring for 20 minutes, and filter with suction.

[0042] (2) Add cetylamine ethanol solution to the filter cake in step (1), stir for 1 hour after the addition is complete, and filter with suction.

[0043] (3) Washing and vacuum drying to finally obtain organic montmorillonite with good particle dispersion, fluffy and no need for grinding.

[0044] Wherein, wherein the weight content of each substance is:

[0045] Montmorillonite: 25%

[0046] Polyphosphoric acid: 30%

[0047] Cetylamine: 45%

[0048] The preparation of organic montmorillonite modified asphalt is as follows:

[0049] The organic montmoril...

Embodiment 3

[0051] Preparation of organic montmorillonite:

[0052] Among them, the content of montmorillonite in montmorillonite is more than 97%, and its particle size is 10um. Polyphosphoric acid has a degree of polymerization of 100.

[0053] (1) Under the condition of high-speed stirring (1500r / min), quickly add montmorillonite to polyphosphoric acid ethanol solution, keep stirring for 20 minutes, and filter with suction.

[0054] (2) Add the stearylamine ethanol solution to the filter cake in step (1), stir for 1 hour after the addition, and filter with suction.

[0055] (3) Washing and vacuum drying to finally obtain organic montmorillonite with good particle dispersion, fluffy and no need for grinding.

[0056] Wherein, wherein the weight content of each substance is:

[0057] Montmorillonite: 25%

[0058] Polyphosphoric acid: 35%

[0059] Octadecylamine: 45%

[0060] The preparation of organic montmorillonite modified asphalt is as follows:

[0061] The organic montmorilloni...

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