A kind of asphalt additive, asphalt composition containing the same and its preparation method

A technology of asphalt additive and asphalt composition, which is applied in the field of asphalt additives, can solve the problems of asphalt binder low-temperature modulus increase, difficulty in obtaining, and complex structure of the second additive, so as to achieve no emission of three wastes, increase penetration index, The effect of easing conditions

Active Publication Date: 2019-06-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The second additive in this method has a complex structure and is not easy to obtain
Moreover, the addition of this gelling compound causes an increase in the low temperature modulus of the asphalt binder

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Heat 1000g of No. 70 asphalt in Table 1 to 145°C, add 30g of asphalt additive A (among them, the number average molecular weight of polyisobutylene is 1000), start the agitator (150rpm), stir for 30min, and analyze the properties, see Table 2.

Embodiment 2

[0027] The specific preparation method is the same as in Example 1, except that the asphalt additive A is changed to asphalt additive B, and the amount of asphalt additive B added is 60 g, wherein the number average molecular weight of polyisobutylene is 3000.

Embodiment 3

[0029] The specific preparation method is the same as in Example 1, except that the asphalt additive A is changed to asphalt additive C, and the amount of asphalt additive C added is 90 g, wherein the number average molecular weight of polyisobutylene is 1000.

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PUM

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Abstract

The invention discloses an asphalt additive, an asphalt composition containing the additive and a preparation method thereof. The asphalt additive comprises castor oil and polyisobutylene, wherein the castor oil weight content is 15-75%, and the polyisobutylene weight content is 25-85%. The additive added in a matrix asphalt has good effect for increasing the penetration index of the asphalt. The method has the advantages of simple process and easy enforcement, and is in favor of wide application.

Description

technical field [0001] The invention relates to an asphalt additive, an asphalt composition containing the additive and a preparation method thereof, in particular to an additive for improving the performance of road asphalt and a method for preparing the asphalt composition. Background technique [0002] In 2004, according to the development of road asphalt standards, the Ministry of Communications of China released the new "Technical Specifications for Construction of Highway Asphalt Pavement" (JTG F40-2014), which was implemented in 2005. This specification divides road asphalt into three grades: A, B and C, and grade A is the highest grade, which is suitable for all road surface projects. In this grading system, the penetration index (PI value) is one of the important grading indicators. The standard requirement for PI value of grade A asphalt is -1.5~+1.0, grade B is -1.8~+1.0, grade C is not do request. [0003] Penetration index refers to the degree of change of bit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L23/20C08L91/00
Inventor 刘树华姚汉荣
Owner CHINA PETROLEUM & CHEM CORP
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