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Polymer modified asphalt, and preparation method thereof

A technology of modified asphalt and polymer, which is applied in the direction of building structure, building components, building insulation materials, etc. It can solve the problems of the influence of modified asphalt on the performance of modified asphalt and weaken the adhesion between modified asphalt and aggregate, so as to slow down Effects of long-term aging, shortening storage stability time, and improving cross-linking speed

Active Publication Date: 2019-11-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the addition of compatibilizer is beneficial to the swelling of SBS modifier, it will weaken the adhesion between modified asphalt and aggregate, and will have a certain impact on the performance of modified asphalt

Method used

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  • Polymer modified asphalt, and preparation method thereof
  • Polymer modified asphalt, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Example 1 Preparation of blended asphalt

[0053] See Table 1-1 and Table 1-2 for the properties of base bitumen, colloidal structure regulating components and Jingmen extracted oil respectively. Heat and melt the base asphalt and the colloidal structure adjustment components respectively, mix them according to the ratio shown in Table 2, and stir for 1 hour at 155°C to obtain the blended asphalt. See the raw materials and properties of the blended asphalt figure 1 , figure 2 , Table 1-1, 1-2 and Table 2. The matrix bitumen is derived from naphthenic crude oil, and the colloid structure adjustment component is derived from intermediate base crude oil.

[0054] project Base bitumen (P100) Base Bitumen (P110) Base bitumen (P120) Colloidal Structure Modulating Component (P120) Colloidal Structure Modulating Component (P140) Penetration (25℃) / 0.1mm 100 110 120 120 140 PI value -1.24 -1.28 -1.45 0.9 0.8 Softening point / ℃ 44.0 ...

Embodiment 2

[0058] Example 2 Preparation of polymer modified asphalt

[0059] Heat the blended asphalt to 160°C, add SBS and then shear or grind for 0.5 hours, add 1 / 2 of the stabilizer and 1 / 2 of the accelerator, continue to shear or grind for 0.5 hours, then raise the temperature to 185°C, and then add For the remaining stabilizer and accelerator, continue to stir for 3 hours to obtain polymer-modified asphalt.

[0060] polymer modified bitumen Blended asphalt and its content SBS and content Stabilizer and content Accelerator and content Example 2-1 Blended asphalt-1, 92.4% YH-791, 6% Sublimed sulfur, 0.8% Lanthanum diethyldithiocarbamate, 0.8% Example 2-2 Blended bitumen-4, 92.4% YH-791, 6% Sublimed sulfur, 0.8% Lanthanum diethyldithiocarbamate, 0.8% Comparative example 1 Blended bitumen-5, 92.4% YH-791, 6% Sublimed sulfur, 0.8% Lanthanum diethyldithiocarbamate, 0.8% Comparative example 2 Blended bitumen-5, 92.4% YH-791, ...

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Abstract

The invention discloses a polymer modified asphalt, and a preparation method thereof. The polymer modified asphalt is prepared from a specific blended asphalt, so that the obtained polymer modified asphalt contains no compatibilizer. According to the specific blended asphalt, a specific matrix asphalt and a colloid structure are selected to adjust the components; the colloid structure is adopted to adjust the components, so that matrix asphalt needle penetration is changed, and in composition, mutual complementation with the matrix asphalt is realized, the obtained blended asphalt is reasonable in component matching, and modification is convenient to realize. The polymer modified asphalt is excellent in compatibility, high and low temperature performance, aging resistance, fatigue resistance, and road using performance, and the performance is capable of satisfying technical index requirements of polymer modified asphalt.

Description

technical field [0001] The invention relates to a polymer modified asphalt and a preparation method thereof, in particular to a SBS modified asphalt with good compatibility and a preparation method thereof. Background technique [0002] Petroleum asphalt is a product of crude oil processing. It is a black or dark brown viscous liquid, semi-solid or solid at room temperature. It mainly contains chloroform-soluble hydrocarbons and non-hydrocarbon derivatives. Many changes have taken place in modern highways and roads: it is required to further improve the anti-flow performance of the pavement, that is, the ability to resist rutting at high temperatures; improve flexibility and elasticity, that is, the ability to resist cracking at low temperatures; improve wear resistance and extend service life, etc. Therefore, more and more attention has been paid to the modification of asphalt. The variety and preparation technology of modified asphalt depends on the type of modifier, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L91/00C08L53/02C08K3/06C08K5/39
CPCC08L95/00C08L2201/08C08L2205/025C08L2205/035C08L91/00C08L53/02C08K3/06C08K5/39
Inventor 张建峰宁爱民郭皎河刘树华郭小圣
Owner CHINA PETROLEUM & CHEM CORP
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