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Waste and old rubber powder modifying asphalt and preparation method thereof

A technology of waste rubber powder and modified asphalt, which is applied in building components, building insulation materials, buildings, etc., can solve the problems of asphalt aging, achieve the effect of improving the performance of use, improving performance, and delaying the rise of reflective cracks

Inactive Publication Date: 2008-09-17
陕西长大博源公路养护科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention improves the performance of the product by optimizing the formula of rubber modified asphalt; by changing the production process, it solves the problem of partial asphalt aging during the material modification process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1: Take the production of about 100 kg of the rubber powder modified asphalt product of the present invention as an example, the asphalt in the formula is grade A naphthenic road petroleum asphalt, the penetration is 90; the rubber powder is 30 mesh. The compatibilizer and dispersant in the formula account for about 5% and 3% of the rubber powder content respectively:

[0019] Components and weight percentages contained in the formula are:

[0020] Asphalt 75.00kg

[0021] Waste rubber powder 23.16kg

[0022] Compatibilizer 1.15kg

[0023] Dispersant 0.69kg

[0024] Take 75.00kg of SK-90 petroleum asphalt, heat it to 160°C in the reaction kettle, then slowly add 60 mesh waste tire ground rubber powder, compatibilizer, dispersant, and stir at low speed (300~1500 rpm) for 20 Minutes later, the temperature was raised to 220° C., and then sheared with a high-speed shear for 30 minutes at a speed controlled at 5000 rpm, and then put into a storage tank for 90 min...

Embodiment 2

[0025] Example 2: Take the production of about 100 kg of the rubber powder modified asphalt product of the present invention as an example, the asphalt in the formula is grade B naphthenic road petroleum asphalt, the penetration is 90; the rubber powder is 60 mesh. The compatibilizer and dispersant in the formula account for about 5% and 3% of the rubber powder content respectively:

[0026] Components and weight percentages contained in the formula are:

[0027] Asphalt 90.00kg

[0028] Waste rubber powder 9.64kg

[0029] Compatibilizer 0.48kg

[0030] Dispersant 0.28kg

[0031] Take 90.00kg of SK-90 petroleum asphalt, heat it to 150°C in the reaction kettle, then slowly add 30 mesh waste tire ground rubber powder, compatibilizer, dispersant, stir at low speed for 15 minutes, heat up to 170°C, and then Use a high-speed shearing machine to cut for 40 minutes, the rotating speed is controlled at 7000 rpm, and then put it into a storage tank for 45 minutes to develop to obta...

Embodiment 3

[0032] Example 3: Taking the production of about 100 kg of rubber powder modified asphalt products of the present invention as an example, the asphalt in the formula is naphthenic road petroleum asphalt grade A, with a penetration of 110; rubber powder is 40 mesh. The compatibilizer and dispersant in the formula account for 1% and 1% of the rubber powder content respectively:

[0033] Components and weight percentages contained in the formula are:

[0034] Asphalt 75.00kg

[0035] Waste rubber powder 24.50kg

[0036] Compatibilizer 0.25kg

[0037] Dispersant 0.25kg

[0038] Take 75.00kg of SK-110 petroleum asphalt, heat it to 160°C in the reaction kettle, then slowly add 60 mesh waste tire ground rubber powder, compatibilizer, dispersant, stir at low speed for 10 minutes, heat up to 170°C, and then Use a high-speed shearing machine to cut for 30 minutes, the rotating speed is controlled at 5000 rpm, and then put it into a storage tank for 90 minutes to develop to obtain th...

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Abstract

The invention relates to old rubber powder modified asphalt and a preparation method thereof. In the preparation method, asphalt, old rubber powder, a compatibilizer, and a dispersant are thoroughly mixed, and are cut and broken at high speed for a period of time, and are arranged in a tank for upgrowth for a period of time, thus getting the product. In the preparation method, junked tire rubber powder is used as a key component, thus improving the performance of the product, reducing the product cost, changing wastes into valuables and reducing the pollution. The product can be widely used as construction and maintenance materials of roads, such as deck waterproof layers, stress absorbed layers, synchronous crushed stone seal coat of asphalt and so on.

Description

technical field [0001] The invention relates to a road construction material, in particular to rubber powder modified asphalt and a preparation method thereof. Background technique [0002] Ruts, cracks and potholes are several major diseases of roads, which are caused by the poor high temperature stability, low temperature crack resistance and water damage resistance of asphalt mixture. In order to reduce the occurrence of these situations, most of the materials used for road paving, repair and maintenance now use modified asphalt materials. At present, the most used modified asphalt materials are SBS modified asphalt materials, SBR latex modified asphalt materials and EVA, PE modified asphalt materials, but these kinds of asphalt modifiers are all expensive. The sexual process is more complicated. According to data reports, adding waste rubber powder can make the asphalt achieve the modification effect, and its performance index can reach the standard of SBS modified asp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08K5/10C08L21/00C08K3/32
Inventor 周振支徐培华宗建华徐玮贾晓放
Owner 陕西长大博源公路养护科技有限公司
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