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Waste rubber powder modified asphalt composition for increasing storage stability and preparation method thereof

A technology of modified asphalt and composition, which is applied in the direction of building structure, building components, building insulation materials, etc. It can solve the problems of complex process, deterioration of asphalt properties, unfavorable production, etc., and achieve simple ingredients, low production cost, and high production The effect of simple method

Active Publication Date: 2008-03-19
FUSHUN RES INST OF PETROLEUM & PETROCHEMICALS SINOPEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of process is complex, while the rubber powder is degraded, the properties of the asphalt are also deteriorated.
WO9414896, WO9728220, CN03135004 propose to add higher content of rubber powder into asphalt, and prepare high-concentration rubber powder modified asphalt through high-speed shearing and high temperature mixing to obtain degraded storage-stable rubber powder modified asphalt. This method is used in When preparing high-concentration rubber powder modified asphalt, the viscosity is too high, which is not conducive to production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 400 grams of base asphalt with a penetration (25°C, 0.1mm) of 94, first heated to 160°C to melt; add 13% of treated 80-mesh rubber powder (with a liquid additive accounting for 5% of the weight of the rubber powder [Zibo Qi 1502 latex produced by Xiang Industry and Trade Co., Ltd.] Spray and wrap the rubber powder, dry at 80°C for 1 hour.) and 0.15% sulfur cross-linking agent, and shear at 180°C for 90 minutes. Compared with the modified asphalt without rubber powder pretreatment, the stability of the rubber powder modified asphalt is significantly improved, and the difference between the upper and lower softening points of the segregation test changes from -5.5°C to -0.5°C, fully reaching The technical requirements for storage stability of SBS modified asphalt have been stipulated.

Embodiment 2

[0023] Compared with Example 1, the difference between this example and Example 1 is that 2% of SBS polymer is added, and the prepared rubber powder modified asphalt not only has qualified storage stability, but also has other properties that can fully meet the requirements stipulated by the Ministry of Communications. JTG F40-2004 polymer modified asphalt I-C technical index requirements. Penetration of the modified asphalt (25°C, 0.1mm) is 73, softening point: 55.0°C, ductility at 5°C: 31cm, difference between upper and lower softening points after storage: -0.5°C, needle ratio after TFOT: 80%, after TFOT 5°C ductility: 22cm.

Embodiment 3

[0025] 400 grams of base asphalt with a penetration (25°C, 0.1mm) of 90, heated and melted first; add 15% of treated 120-mesh rubber powder (with a liquid additive [polybutadiene latex] accounting for 20% of the weight of the rubber powder , Zibo Yuming Industrial Co., Ltd.] Spray and wrap the rubber powder, dry at 100°C for 40 minutes), cut at 190°C for 90 minutes, and then add 1.5% of SBS, 1.0% of SBR and 0.2% of bismuth Tetramethylthiuram sulfide, and then continue to shear for 60 minutes. The modified asphalt has a penetration (25°C, 0.1mm) of 70, a softening point of 58.5°C, a ductility of 5°C of 35cm, and a difference between the upper and lower softening points after storage: -1.0°C.

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Abstract

The invention provides a rubber modified asphalt composition for improving storage stability and a method for preparing the same. Firstly, one or more liquid additives are used to spray the rubber powders, and then the treated waste rubber powders are added into basic asphalt. At appropriate temperature, the rubber powder modified asphalt of the invention can be obtained after treated by high shearing or colloid grinding equipments for a while. The method provided by the invention not only has a simple technology and obviously improves the stability of the rubber powder modified asphalt, and the prepared modified asphalt has good high-and-low temperature performance.

Description

technical field [0001] The invention relates to a waste rubber powder modified asphalt composition and a preparation method thereof, in particular to a composition for improving the storage stability of waste rubber powder modified asphalt and a preparation method thereof. Background technique [0002] With the development of the automobile industry, more and more "black pollution" formed by waste tires is threatening our living environment. Using waste rubber powder to produce high-quality modified asphalt can make full use of waste rubber. It is beneficial to eliminate environmental pollution, and can also improve the performance of asphalt pavement. [0003] However, at present, a small amount of modified asphalt using waste tire rubber powder is limited to on-site production, which is used while producing, and the modification effect is not very satisfactory. The main technical problem is the storage stability of rubber powder modified asphalt. In order to improve the...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08J3/24C08L21/00
Inventor 程国香张建峰刘树华郭皎河傅丽于晓洋
Owner FUSHUN RES INST OF PETROLEUM & PETROCHEMICALS SINOPEC CORP
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