PG (performance graded) compound asphalt modifier and modified asphalt prepared from same

A technology of compound asphalt and modified asphalt, applied in building components, building insulation materials, construction and other directions, can solve problems such as the increase of system viscosity, achieve the effect of improving comprehensive performance, reducing system viscosity and improving production efficiency

Active Publication Date: 2016-10-26
CHINA OFFSHORE BITUMEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the existing modification technology, when the PG high temperature grade meets 82 and above, the viscosity of the system will increase

Method used

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  • PG (performance graded) compound asphalt modifier and modified asphalt prepared from same
  • PG (performance graded) compound asphalt modifier and modified asphalt prepared from same
  • PG (performance graded) compound asphalt modifier and modified asphalt prepared from same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Example 1, preparation of PG graded composite asphalt modifier and PG88-28 modified asphalt

[0040] 1. Preparation of PG graded composite asphalt modifier

[0041] In parts by weight, the formula of the PG graded composite asphalt modifier in this embodiment is as follows:

[0042]

[0043] The preparation method is as follows: according to the above formula, mix the components except softening oil, then add softening oil to soften, and extrude through a twin-screw extruder to obtain the PG graded composite asphalt modifier.

[0044] 2. Prepare PG88-28 modified asphalt by using the above-mentioned PG graded composite asphalt modifier

[0045]Prepare PG88-28 modified asphalt according to the following steps:

[0046] Raise the temperature of No. 70 base asphalt to 150°C, and evenly add the PG graded composite asphalt modifier prepared above, wherein the ratio of PG graded composite asphalt modifier: base asphalt is 1:1.8, start stirring and raise the temperature to...

Embodiment 2

[0052] Example 2, preparation of PG graded composite asphalt modifier and PG88-28 modified asphalt

[0053] 1. Preparation of PG graded composite asphalt modifier

[0054] In parts by weight, the formula of the PG graded composite asphalt modifier in this embodiment is as follows:

[0055]

[0056] The preparation method is as follows: according to the above formula, mix the components except softening oil, then add softening oil to soften, and extrude through a twin-screw extruder to obtain the PG graded composite asphalt modifier.

[0057] 2. Prepare PG88-28 modified asphalt by using the above-mentioned PG graded composite asphalt modifier

[0058] Prepare PG88-28 modified asphalt according to the following steps:

[0059] Raise the temperature of No. 70 base asphalt to 150°C, and evenly add the PG graded composite asphalt modifier prepared above, wherein the ratio of PG graded composite asphalt modifier: base asphalt is 1:1.8, start stirring and raise the temperature t...

Embodiment 3

[0065] Example 3, preparation of PG graded composite asphalt modifier and PG88-28 modified asphalt

[0066] 1. Preparation of PG graded composite asphalt modifier

[0067] In parts by weight, the formula of the PG graded composite asphalt modifier in this embodiment is as follows:

[0068]

[0069] The preparation method is as follows: according to the above formula, mix the components except softening oil, then add softening oil to soften, and extrude through a twin-screw extruder to obtain the PG graded composite asphalt modifier.

[0070] 2. Prepare PG88-28 modified asphalt by using the above-mentioned PG graded composite asphalt modifier

[0071] Prepare PG88-28 modified asphalt according to the following steps:

[0072] Raise the temperature of No. 50 base asphalt to 150°C, and evenly add the composite modifier, wherein the ratio of composite modifier: base asphalt is 1:2.2, start stirring and raise the temperature to 185°C, and stir at 200 rpm for 4 hours to obtain ...

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Abstract

The invention discloses a PG (performance graded) compound asphalt modifier and modified asphalt prepared from the same. The PG compound asphalt modifier comprises raw materials in parts by weight as follows: 25-35 parts of a high-temperature reinforcing agent, 13-20 parts of petroleum resin, 8-10 parts of SBS, 30-50 parts of softening oil, 1-8 parts of an organic viscosity reducer and 0.5-1 part of an anti-aging agent. The PG88-28 modified asphalt is prepared from the PG compound asphalt modifier and matrix asphalt in the mass ratio being 1: (1.8-2.2). The modifier comprising SBS and the like can combine high-temperature performance and low-temperature performance, the combination property is improved remarkably, and the PG performance of the asphalt can reach PG88-28 or higher under assistance of the high-temperature reinforcing agent. The asphalt performance can reach the level I-D or I-C of the penetration degree when meeting the PG88-28.

Description

technical field [0001] The invention relates to asphalt modified materials, in particular to a PG graded composite asphalt modifier and the prepared modified asphalt. Background technique [0002] With the development of the economy and society, the requirements for the construction quality of road engineering are increasing day by day. Asphalt, as an important material for road construction, has also received more and more attention. In the past two years, PG classification as an important evaluation system has gradually expanded. PG classification is based on the actual application performance of asphalt as the evaluation object, which includes two evaluation indicators of high temperature and low temperature. Generally speaking, high and low temperature performance are contradictory indicators, but for asphalt used in extreme climate areas such as high altitudes and areas with a lot of sunlight, it is required to have excellent high and low temperature performance at the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L57/02C08L53/02C08L91/00C08L91/06
CPCC08L95/00C08L2201/08C08L2205/025C08L2205/035C08L2555/72C08L2555/84C08L57/02C08L53/02C08L91/00C08L91/06
Inventor 邓文广王涵李佰昌张斌郭娜高滨王红祥李文
Owner CHINA OFFSHORE BITUMEN
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