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Composite modified hard asphalt and preparation method thereof

A hard asphalt, composite modification technology, applied in building components, building insulation materials, buildings, etc., can solve the problems of less low-temperature performance analysis, high-temperature viscosity, poor fluidity, etc. The method is simple, and the high-low temperature performance is good. , Good fluidity at high temperature

Inactive Publication Date: 2016-04-13
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Hard asphalt is prepared by modified mode, such as CN101492570B prepares a kind of hard road asphalt composition with hard asphalt, softener, modifier and matrix asphalt, which has excellent high temperature performance, fatigue resistance and aggregate Adhesion, but less analysis of low temperature performance
CN20110132518 prepared composite modified low-grade asphalt by compounding rubber powder and SBS. The prepared modified asphalt has good high-temperature performance, but high-temperature viscosity is large and fluidity is poor
The inventor involved the preparation of SBS / rubber powder composite modified hard asphalt in the paper "Preparation and Microstructure of Composite Modified Hard Asphalt", but there are still some defects in its preparation process and performance, especially in low temperature performance and thermal performance. Storage stability needs to be further improved

Method used

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  • Composite modified hard asphalt and preparation method thereof
  • Composite modified hard asphalt and preparation method thereof
  • Composite modified hard asphalt and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044]Heat 100 parts of a certain AH-70 asphalt to 135°C, add 4 parts of compatibilizer A, stir at 300rpm for 20 minutes to fully mix the two; then raise the temperature to 200°C, increase the stirring speed to 1000rpm, slowly add 15 parts of 30 waste rubber powder, and stir for 2.5 hours; then change the high-speed shearing machine, increase the speed to 4000rpm, slowly add 3 parts of SBS1301-1 modifier, and shear for 50 minutes; reduce the temperature to 180°C, and slowly add 0.2 parts of cross-linking agent NH4L agent, stirred at 700rpm for 4 hours; finally, the temperature dropped to 175°C, and the rotation speed was reduced to 300rpm, slowly added 10 parts of hard asphalt 1#, and stirred for 20 minutes. The main performance indicators of the obtained composite modified hard asphalt are shown in Table 3 .

Embodiment 2

[0046] Heat 100 parts of a certain AH-70 asphalt to 145°C, add 6 parts of compatibilizer B, stir at 400rpm for 25min to fully mix the two; then raise the temperature to 195°C, increase the stirring speed to 800rpm, slowly add 19 parts of 40 waste rubber powder, and stir for 3 hours; then change the high-speed shearing machine, increase the speed to 4500rpm, slowly add 2 parts of SBS4303-2 modifier, and shear for 45 minutes; reduce the temperature to 185°C, and slowly add 0.25 parts of cross-linking agent DY-1, stirred at 1000rpm for 3.5h; finally the temperature dropped to 180°C, reduced the speed to 500rpm, slowly added 15 parts of hard asphalt 2#, and stirred for 30min. The main performance indicators of the obtained composite modified hard asphalt are shown in table 3.

Embodiment 3

[0048] Heat 100 parts of a certain AH-90 asphalt to 130°C, add 3 parts of compatibilizer C, stir at 300rpm for 20 minutes to fully mix the two; then raise the temperature to 195°C, increase the stirring speed to 1000rpm, slowly add 17 parts of 60 waste rubber powder, and stir for 3 hours; then change the high-speed shearing machine, increase the speed to 5000rpm, slowly add 2.5 parts of SBS501 modifier, and shear for 50 minutes; reduce the temperature to 180°C, and slowly add 0.3 parts of cross-linking agent DY- 2. Stir at 1000rpm for 3 hours; finally, at 185°C, reduce the rotation speed to 400rpm, slowly add 10 parts of hard asphalt 2#, and stir for 20 minutes. The main performance indicators of the obtained composite modified hard asphalt are shown in Table 3.

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Abstract

The invention discloses composite modified hard asphalt and belongs to the technical field of hard asphalt modification. The modified hard asphalt comprises components in parts by weight as follows: 100 parts of matrix asphalt, 3-8 parts of a compatilizer, 10-20 parts of rubber powder, 1-3 parts of polymers, 0.1-0.4 parts of an aid and 10-30 parts of hard asphalt. The invention further discloses a preparation method of the composite modified hard asphalt. The composite modified hard asphalt has the characteristics of high-and-low temperature performance, stability in storage, excellent ageing resistance, good construction workability and the like, is resistant to rutting, cracking, fatigue and ageing and has good high-temperature liquidity. The preparation method of the composite modified hard asphalt adopts simple steps, is easy to operate and low in cost and has better popularization and application prospect in actual engineering.

Description

technical field [0001] The patent of the invention belongs to the technical field of hard asphalt modification, and specifically relates to a composite modified hard asphalt and a preparation method thereof. Background technique [0002] With the increase of traffic volume, the increase of automobile axle load and the increasingly serious traffic channelization, as well as the influence of pavement design and high temperature climate, asphalt pavement has serious rutting, cracking and peeling, among which rutting has become the current asphalt It is one of the most serious damage forms of pavement, which seriously affects the driving safety, service level and service life of asphalt pavement. [0003] At present, there are mainly two ways to improve the anti-rutting ability of asphalt mixture. One is to prepare low-grade hard asphalt through processes such as straight distillation, oxidation and solvent extraction, but the low-temperature performance of the prepared asphalt ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L91/00C08L21/00C08L53/02
CPCC08L95/00C08L2205/025C08L2205/035C08L2205/08C08L91/00C08L21/00C08L53/02
Inventor 董夫强于新徐波丁功瀛刘圣洁尹龙
Owner HOHAI UNIV
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