Modified asphalt for asphalt pavement in seasonally frozen ground region

A technology of modified asphalt and asphalt pavement, which is applied in the field of asphalt and modified asphalt, which can solve the problems of insufficient high-temperature performance, poor anti-aging performance, and excellent low-temperature performance, so as to reduce modification cost, improve viscoelastic performance, and prolong service life The effect of longevity

Inactive Publication Date: 2019-08-02
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above-mentioned technical problems existing in asphalt pavements in seasonally frozen regions, the present invention provides a modified asphalt that can be used for asphalt pavements in seasonally frozen regions. Medium and high-grade asphalt has excellent low-temperature performance but insufficient high-temperature performance and poor anti-aging performance

Method used

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  • Modified asphalt for asphalt pavement in seasonally frozen ground region
  • Modified asphalt for asphalt pavement in seasonally frozen ground region
  • Modified asphalt for asphalt pavement in seasonally frozen ground region

Examples

Experimental program
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Effect test

Embodiment 1

[0030] A modified asphalt that can be used for roads in seasonally frozen regions, including the following raw materials: 400g of 110# road petroleum asphalt, and 20g of diatomite.

[0031] Among them, the three major indicators and four component contents of 110# road petroleum asphalt are shown in Tables 1 and 2:

[0032] Table 1 Three major indicators of base asphalt

[0033] asphalt grade Penetration at 25℃ / 0.1mm 10℃ ductility / cm Softening point / ℃ 110# 119 >150 42.0 requirements 100～120 ≮30 ≮41

[0034] Table 2 Contents of four components of base asphalt

[0035] asphalt grade Saturation / % Aroma / % Colloid / % Asphaltenes / % 110# 3.9 68.3 17.2 10.6

[0036] Wherein the technical index of diatom concentrate is as shown in table 3:

[0037] Table 3 Technical indicators of diatomite

[0038] project technical indicators Exterior off-white pH 7.8 Diatom particle size 5-22μm di...

Embodiment 2-3

[0049] The present embodiment 2-3 provides a kind of modified bitumen that can be used for roads in seasonally frozen regions, its components are the same as in Example 1, and the mass percentages of each component are as shown in Table 7, and its preparation method is the same as in Example 1. 1 is the same. The performance test results of the prepared modified asphalt are comparable to Example 1.

[0050] Table 7 Mass percentage content of each component of modified asphalt

[0051] components Example 2 Example 3 110# road petroleum asphalt 94.8％ 95.7％ diatomaceous earth 5.2％ 4.3％

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Abstract

The invention provides modified asphalt for an asphalt pavement in a seasonally frozen ground region. The modified asphalt is prepared from components in percentage by mass as follows: 94.8%-95.7% of110# road petroleum asphalt and 4.3%-5.2% of refined diatomite, wherein the 110# road petroleum asphalt is high-grade asphalt applicable to the seasonally frozen ground region, and the refined diatomite is a product after beneficiation and purification of diatomite ore. The modified asphalt is used for the seasonally frozen ground region which is cold in winter and hot in summer, and the high temperature and anti-ageing performance of the high-grade asphalt can be improved on the premise that certain low-temperature performance is guaranteed, so that the service life of the asphalt pavement isprolonged, and pavement diseases are reduced. Besides, less refined diatomite is used, a better modification effect is obtained, and the modification cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of chemical industry and materials, and relates to asphalt, in particular to a modified asphalt used for asphalt pavement in seasonally frozen regions. Background technique [0002] Asphalt is a dark brown complex mixture composed of hydrocarbons of different molecular weights and their non-metallic derivatives. It can be mainly divided into three types: coal tar pitch, petroleum pitch and natural pitch. In the field of building materials, road petroleum pitch is often used for asphalt pavement. paving. Asphalt pavement refers to various types of pavement that are paved after mixing road petroleum asphalt with mineral materials of different grades and contents and produced through specific technological processes. The asphalt binder improves the ability of paving aggregates to resist damage to the road surface caused by driving and natural factors, making the road surface smooth, less dusty, impermeable and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08K7/26
CPCC08K7/26C08K2201/003C08K2201/006C08L2201/08C08L95/00
Inventor 杜守继张君韬
Owner SHANGHAI JIAO TONG UNIV
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