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Modified asphalt composition and preparation method thereof

A technology of modified asphalt and composition, which is applied in building structures, building components, building insulation materials, etc., can solve the problems of increased cost, easy delamination and segregation, etc., and achieves extended service life, simple process, and not easy to agglomerate. Effect

Active Publication Date: 2015-07-22
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are also deficiencies such as increased cost and easy layering and segregation.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Heat the base asphalt to 160°C to melt, and add powdered sodium stearate to the base asphalt, wherein the base asphalt is vacuum residue with a penetration of 117 1 / 10mm at 25°C and a softening point of 42.8°C, accounting for 10% of the total 96.53%, sodium stearate accounted for 3.0% of the total, at 160 ° C, mixed with a high-shear emulsifier (rotational speed: 3800r / min) for 10 minutes, and then added evenly for 3 minutes under normal stirring. Asphalt 0.47% glycerin, mixed reaction at the same temperature for 120min, the properties of the modified asphalt were tested (results are shown in Table 1).

Embodiment 2

[0034] Heat the base asphalt to 180°C to melt, and add powdered calcium stearate and sodium stearate into the melted base asphalt while stirring with ordinary stirring equipment. Among them, the 25°C penetration of base asphalt is 130 1 / 10mm, the softening point is 44.5°C, accounting for 95.2% of the total modified asphalt, calcium stearate accounts for 2.5% of the total amount, and sodium stearate accounts for 2.5% of the total amount. 1.5%. Stir and mix for 30 minutes at 180°C, then raise the temperature to 220°C and add a mixture of glycerin and water accounting for 0.8% of the total amount under stirring (the mass ratio of glycerol to water is 3:1), stir and mix for 60 minutes and then cool down to End at 160°C, and test the properties of the modified asphalt (results are shown in Table 1).

Embodiment 3

[0036] Heat the base asphalt to 170°C to melt, add the mixture of powdered zinc stearate, calcium stearate and sodium stearate under stirring with ordinary stirring equipment and stir for 50 min, then raise the temperature to 200°C, add under stirring Glycerin accounts for 1.2% of the total. Among them, the basic asphalt is oxidized asphalt with a penetration of 126 1 / 10mm at 25°C and a softening point of 46.5°C, accounting for 94.3% of the total modified asphalt, zinc stearate accounts for 1.5% of the total, calcium stearate accounts for 1.5% and sodium stearate accounted for 1.5% of the total. Stir at 200°C for 50 minutes with an ordinary paddle stirring device, then heat up to 260°C and stir for 10 minutes, then cool down to 170°C and finish, and test the properties of the modified asphalt (results are shown in Table 1).

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Abstract

The invention provides a modified asphalt composition and a preparation method thereof. The modified asphalt composition comprises, by weight, 87.5% to 98.9% of base asphalt, 1% to 10% of a modifier and 0.1% to 2.5% of a gelatinizing agent (a structure improver). The preparation method comprises the following steps: uniformly dispersing the modifier into the base asphalt at a temperature of 150 to 260 DEG C by using equipment like an ordinary agitator, a high speed shearing machine or a colloid mill to prepare the modified asphalt composition; and adding the gelatinizing agent to allow a sol-gel type colloid structure of asphalt to be converted into a gel type colloid structure and to allow a stable colloid structure of asphalt to be formed. According to the invention, the preparation method for the modified asphalt composition is simple; and the prepared modified asphalt composition has a high softening point, high viscosity, a high penetration index, excellent high and low temperature performance, excellent ageing resistance, small temperature sensitivity and the like, can reduce occurrence of damages like tracks and upheaval on a pavement and prolong a maintenance period of the pavement and is applicable to construction of high-grade highways.

Description

technical field [0001] The invention relates to a modified asphalt composition and a preparation method thereof, in particular to a modified asphalt composition and a preparation method thereof which can improve high-temperature stability, anti-aging performance, temperature sensitivity and other performances. The modified asphalt product prepared by the invention can be used in road construction, building waterproofing, hydraulic anti-seepage and other engineering constructions. Background technique [0002] Due to regional differences, some areas have a large temperature difference between winter and summer, and the use environment of asphalt pavement is harsh. In addition, due to the rapid increase in traffic volume, large-scale vehicles, heavy and overloaded vehicles, etc., the current asphalt pavement has high temperature rutting, low temperature cracking and water damage. Damage and other phenomena are still relatively serious. In addition, for some asphalt processed ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08K5/098C08K5/053
Inventor 郭皎河傅丽李永泰曲涛张建峰
Owner CHINA PETROLEUM & CHEM CORP
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