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Preparation method of asphalt for water power engineering

A hydraulic and asphalt technology, applied in the field of hydraulic asphalt preparation, can solve the problems that the product is difficult to meet the performance requirements of hydraulic asphalt, does not pay attention to the selection of basic raw materials, and cannot obtain high temperature performance, and achieves the improvement of the overall anti-seepage performance, The effect of broadening sources and reducing operating costs

Active Publication Date: 2006-05-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, as far as the production of road asphalt and construction asphalt is concerned, although most of them are realized by oxidation process, they do not pay attention to the selection of basic raw materials, and the raw materials used are determined by the needs of the upstream equipment of the enterprise. The consistency is difficult to adjust, whether the oxidation or semi-oxidation process is used, the product is difficult to meet the performance requirements of hydraulic asphalt, or the oxidation depth is too high, resulting in low-temperature performance decline, or the oxidation depth is not enough, so that the high-temperature performance cannot be improved as it should be
For example, the raw material used in CN1093394A is heavy deasphalted oil from solvent deasphalting, the oxidation temperature is as high as 295-310°C, and the air volume is as high as 350-420NM 3 / t, the time needs to be oxidized for 30-32h. Due to the very harsh oxidation conditions, although the high-temperature performance has been improved, the asphalt is already in a gel state, resulting in increased brittleness of the product and poor rheological properties.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The basic raw material used is straight-run asphalt with a penetration of 105 1 / 10mm, a softening point of 44.3°C and a density of 1.011g / cm 3 . After heating and melting it, put 500g into the oxidation kettle. At this time, the height-to-diameter ratio of the liquid surface is 4:1. 3 Oxidation at 5.5 hours / h was completed, and the samples were released and the properties of the asphalt were tested (results are shown in Table 1).

Embodiment 2

[0023] The basic raw material used is vacuum residue with a penetration of 162 1 / 10mm, a softening point of 39.5°C and a density of 1.008g / cm 3 . After heating and melting, put 600g into the oxidation kettle. At this time, the ratio of height to diameter of the liquid surface is 6:1. 3 Oxidation at / h for 1h, air flow 0.048m 3 Oxidation 2h at / h, at an air flow rate of 0.06m 3 Oxidation at 4h / h was completed, and the samples were released and the properties of the asphalt were tested (results are shown in Table 1).

Embodiment 3

[0025] The basic raw material used is propane deoiled asphalt (penetration is 781 / 10mm, softening point is 46.1°C, density is 1.018g / cm 3 ) and extracted oil (wax content 0.25%, saturated content 43.24%, aromatic content 43.66%, colloid 12.96%, asphaltenes 0.14%) in a weight ratio of 92:8, and its penetration is 120 1 / 10mm , the softening point is 41.7°C, and the density is 1.16g / cm 3 . After heating and melting, put 550g into the oxidation kettle. At this time, the ratio of height to diameter of the liquid surface is 5:1. 3 Oxidation at 3.5 hours / h was completed, and the samples were released and the properties of the asphalt were tested (results are shown in Table 1).

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Abstract

The inventon provides a preparation method for asphalt used in engineering with water, which comprises: with mild oxidation technique and base material with proper thickness and density and proper condition, discharging oxygen or oxygen-containing body (such as air) to fused base asphalt to prepare the product. This invention is simple. The produt has well cementation, aging-resistance and anti-seepage properties and can be used in hydraulic engineering.

Description

technical field [0001] The invention relates to a preparation method of hydraulic asphalt, in particular to a preparation method of petroleum asphalt for asphalt concrete anti-seepage panels and core walls of water conservancy and hydropower projects. Background technique [0002] As an anti-seepage material, hydraulic asphalt is a special asphalt product, which is widely used in water conservancy and hydropower projects such as dams and power stations, such as anti-seepage panels and core walls. At present, the production method of hydraulic asphalt still adopts the production method of road asphalt, such as distillation, oxidation, blending and so on. But this is not desirable in terms of engineering quality. First of all, the storage tanks used in power stations have their unique working characteristics. Due to the needs of the power system, the water levels of the upper tank and the lower tank are constantly changing, especially when the temperature is low in winter, th...

Claims

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Application Information

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IPC IPC(8): C10C3/04
Inventor 郭皎河曲涛李永泰程国香冯敏哿
Owner CHINA PETROLEUM & CHEM CORP
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