Hydrophobic asphalt with slow release effect and preparation method thereof

A hydrophobic and functional technology, applied in building components, building insulation materials, construction, etc., can solve the problems of shortened service life and poor waterproof effect of asphalt pavement, and achieve the effect of improving service life

Inactive Publication Date: 2020-05-19
周凯 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Due to the current requirements for air pollution control, pavement sprinkling has become the norm, but due to the fact that the pavement is often in a wet state and the coincidence of vehicle loads, the life of asphalt pavement is greatly reduced. In order to improve the life of asphalt pavement, combined with the principle of "lotus leaf hydrophobic", the preparation A kind of hydrophobic asphalt, which makes the surface of such asphalt pavement have hydrophobic ability, so as to improve the life of asphalt pavement under constant wet state
The current waterproofing of pavement is generally to adopt emulsified asphalt seal layer, which only closes the original capillary pores of asphalt pavement in a short period of time, and has a waterproof effect, but with the driving wear of emulsified asphalt film, the waterproof effect is getting worse and worse

Method used

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  • Hydrophobic asphalt with slow release effect and preparation method thereof
  • Hydrophobic asphalt with slow release effect and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0014] A kind of hydrophobic asphalt with sustained release effect, which is made by mixing hydrophobic asphalt modifier and base asphalt at a weight ratio of 3.5:96.5. The hydrophobic asphalt modifier is prepared by weight from the following raw materials: siloxane 1 kg, lignin fiber 1 kg, calcium stearate 3 kg. Among them, the siloxane is polytrifluoropropylmethylsiloxane, and the average length of the lignin fibers is less than 2mm.

[0015] Its preparation method is as follows:

[0016] Step 1), heat the base asphalt to 150-160°C, set aside;

[0017] Step 2), preparation of hydrophobic asphalt modifier: Weigh 1 kg of siloxane, 1 kg of lignin fiber, and 3 kg of calcium stearate by weight, first stir the siloxane and lignin fiber at 55°C for 2 hour, then add calcium stearate and heat to 100°C and mix evenly, and finally extrude and granulate through an extruder to obtain a hydrophobic asphalt modifier;

[0018] Step 3), put the hydrophobic asphalt modifier obtained in ste...

Embodiment 2

[0020] A kind of hydrophobic asphalt with sustained release effect, which is made by mixing hydrophobic asphalt modifier and base asphalt according to the weight ratio of 5:95. The hydrophobic asphalt modifier is prepared by weight from the following raw materials: siloxane 1 kg, lignin fiber 1.2 kg, calcium stearate 4 kg. Among them, the siloxane is polytrifluoropropylmethylsiloxane, and the average length of the lignin fibers is less than 2mm.

[0021] Its preparation method is as follows:

[0022] Step 1), heat the base asphalt to 150-160°C, set aside;

[0023] Step 2), preparation of hydrophobic asphalt modifier: Weigh 1 kg of siloxane, 1.2 kg of lignin fiber and 4 kg of calcium stearate by weight, first stir the siloxane and lignin fiber at 55°C for 2 hour, then add calcium stearate and heat to 100°C and mix evenly, and finally extrude and granulate through an extruder to obtain a hydrophobic asphalt modifier;

[0024] Step 3), put the hydrophobic asphalt modifier obta...

Embodiment 3

[0026] A kind of hydrophobic asphalt with sustained release effect, which is made by mixing hydrophobic asphalt modifier and base asphalt according to the weight ratio of 4:96. The hydrophobic asphalt modifier is prepared by weight from the following raw materials: siloxane 1 kg, lignin fiber 1.1 kg, calcium stearate 3.5 kg. Among them, the siloxane is polytrifluoropropylmethylsiloxane, and the average length of the lignin fibers is less than 2mm.

[0027] Its preparation method is as follows:

[0028] Step 1), heat the base asphalt to 150-160°C, set aside;

[0029] Step 2), preparation of hydrophobic asphalt modifier: Weigh 1 kg of siloxane, 1.1 kg of lignin fiber, and 3.5 kg of calcium stearate by weight, and stir the siloxane and lignin fiber at 55°C for 2 hour, then add calcium stearate and heat to 100°C and mix evenly, and finally extrude and granulate through an extruder to obtain a hydrophobic asphalt modifier;

[0030] Step 3), put the hydrophobic asphalt modifier o...

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Abstract

The invention relates to the field of road materials, in particular to hydrophobic asphalt with a slow-release effect and a preparation method thereof. The service life of an asphalt pavement in a frequently wet state is prolonged. The hydrophobic asphalt is prepared by mixing matrix asphalt and a hydrophobic asphalt modifier according to a weight ratio of (95-96.5): (3.5-5), and the hydrophobic asphalt modifier is prepared by mixing siloxane, lignin fibers and calcium stearate. The hydrophobic asphalt modifier is added into the matrix asphalt according to a weight ratio, and stirring is carried out continuously for 1 hour to obtain the hydrophobic asphalt. According to the hydrophobic asphalt and the preparation method thereof, siloxane is used as a hydrophobic substance, adsorbed into acavity of lignocellulose through a capillary adsorption effect and then slowly released in an asphalt pavement along with time, so that the pavement has a hydrophobic function within a relatively longtime, and the service life is prolonged.

Description

technical field [0001] The invention relates to the field of road materials, in particular to a hydrophobic asphalt with slow-release function and a preparation method thereof, which can improve the service life of asphalt pavement in a constantly wet state. Background technique [0002] Due to the current requirements for air pollution control, pavement sprinkling has become the norm, but due to the fact that the pavement is often in a wet state and the coincidence of vehicle loads, the life of asphalt pavement is greatly reduced. In order to improve the life of asphalt pavement, combined with the principle of "lotus leaf hydrophobic", the preparation A kind of hydrophobic asphalt, which makes the surface of such asphalt pavement have hydrophobic ability, so as to improve the life of asphalt pavement under constant wet state. The current pavement waterproofing generally uses emulsified asphalt sealant, which only closes the original capillary pores of the asphalt pavement i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L97/00C08L83/08C08K5/098
CPCC08L95/00C08L2205/03C08L2205/16C08L97/005C08L83/08C08K5/098
Inventor 周凯杨慧丽
Owner 周凯
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