Frustule asphalt modifier, frustules asphalt modifier modified composite asphalt, and preparation method of frustule asphalt modifier

A technology of composite asphalt and diatom frustule, which is applied in building components, building insulation materials, construction, etc., can solve the problem that diatomite is not used to the maximum extent, and achieve improved temperature sensitivity, high temperature stability, and increased The effect of specific surface area

Inactive Publication Date: 2018-07-31
深圳市海绵城市科学研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, diatomite modified asphalt has been widely concerned and researched in the field of asphalt modification due to its excellent road performance, and researchers have also applied for related patents, but the relevant research is mainly on the direct application of diatomite to asphalt modification without any treatment. Among them, the characteristics of diatomite have not been fully utilized in asphalt modification

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A diatom frustule composite asphalt modifier comprises the following components in parts by weight: 15 parts of diatom frustule, 15 parts of waste rubber powder, 2 parts of petroleum resin or low-grade asphalt, and 1 part of stabilizer.

[0025] The diatom frustule is obtained by burning diatomite in an oxygen-filled state by focusing a high-energy-density pulsed laser beam. The focused high-energy-density pulsed laser beam is femtosecond-level, the laser frequency is 1k-10Mhz, and the laser pulse energy is 0.01 μJ~1mJ, laser scanning speed 0.1mm / s~10mm / s, spacing 0.001mm~0.1mm.

[0026] The waste rubber powder is obtained by crushing waste tires whose main components are natural rubber, cis-butadiene rubber, styrene-butadiene rubber or butyl rubber, and the particle size of the rubber powder ranges from 20 to 100 mesh.

[0027] The stabilizer is prepared from the following raw materials in parts by weight: 20-50 parts of dimethyl phthalate, 10-30 parts of styrene, 10-4...

Embodiment 2

[0029] A diatom frustule composite asphalt modifier comprises the following components in parts by weight: 10 parts of diatom frustule, 20 parts of waste rubber powder, 2 parts of petroleum resin or low-grade asphalt, and 1 part of stabilizer.

[0030] The diatom frustule is obtained by burning diatomite in an oxygen-filled state by focusing a high-energy-density pulsed laser beam. The focused high-energy-density pulsed laser beam is femtosecond-level, the laser frequency is 1k-10Mhz, and the laser pulse energy is 0.01 μJ~1mJ, laser scanning speed 0.1mm / s~10mm / s, spacing 0.001mm~0.1mm.

[0031] The waste rubber powder is obtained by crushing waste tires whose main components are natural rubber, cis-butadiene rubber, styrene-butadiene rubber or butyl rubber, and the particle size of the rubber powder ranges from 20 to 100 mesh.

[0032] The stabilizer is prepared from the following raw materials in parts by weight: 20-50 parts of dimethyl phthalate, 10-30 parts of styrene, 10-4...

Embodiment 3

[0034] The invention provides a diatom frustule composite modified asphalt and its preparation process, characterized in that the specific steps for preparing diatom frustule composite modified asphalt are:

[0035] (1) Take by weight 15 parts of diatom frustules, 15 parts of waste rubber powder, 2 parts of petroleum resin or low-grade asphalt, and 1 part of stabilizer; after the above-mentioned components are mixed uniformly, they are extruded by a screw extruder at low temperature, Diatom frustule composite asphalt modifier was prepared by shear granulation.

[0036] (2) Weigh 82 parts of base asphalt, 8 parts of diatom frustule composite asphalt modifier, 5 parts of SBS, and 5 parts of light oil in parts by weight.

[0037] (3) Place the base asphalt in step (2) in a high-speed shearing machine and heat it to 150°C-180°C, the asphalt is in a molten flow state, mix the diatom frustule composite asphalt modifier and SBS evenly, and then add it to the asphalt After stirring e...

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Abstract

The invention relates to a frustule asphalt modifier, a frustules asphalt modifier modified composite asphalt, and a preparation method of the frustules asphalt modifier. The frustules asphalt modifier is prepared from, by weight, 5 to 20 parts of frustule, 10 to 25 parts of waste rubber powder, 0 to 5 parts of petroleum resin or low grade asphalt, and 0 to 3 parts of a stabilizing agent. The invention also discloses a frustules composite modified asphalt, and a preparation method thereof. The frustule asphalt modifier is capable of improving the high temperature performance, the low temperature performance, the fatigue resistance, and the water stability of asphalt mixtures; the obtained frustules composite modified asphalt possesses excellent heat storage stability, and low temperature crack resistance, and is capable of prolonging the service life of road. A part of expensive SBS is replaced by cheap frustule, compared with the pavement performance of modified asphalt prepared via using of only SBS, the pavement performance is improved, and modified asphalt cost is reduced.

Description

technical field [0001] The invention belongs to the field of asphalt modification, and relates to a modified asphalt and a preparation method thereof, in particular to a diatom frustule asphalt modifier, a modified composite asphalt and a preparation process. Background technique [0002] SBS modified asphalt has been greatly popularized and applied in asphalt modification in my country because of its excellent road performance. But SBS itself is a polymer, with the base pitch in molecular weight. There are large differences in density, solubility and other parameters and other physical and chemical properties, so the compatibility between the two is poor, resulting in poor storage stability of SBS modified asphalt at high temperature, prone to stratification and segregation, which seriously affects the improvement. Modification effect, construction quality and road performance of permanent asphalt. At the same time, the price of SBS continues to rise, resulting in higher ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L19/00C08L57/02C08L53/02C08K9/00C08K7/26
CPCC08K2201/011C08L19/003C08L95/00C08L2205/035C08L57/02C08K9/00C08K7/26C08L53/02
Inventor 沈峻沈光荣沈巍炜周又南
Owner 深圳市海绵城市科学研究院
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