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Waste rubber powder modified asphalt and its prepn process

A technology of modified asphalt and waste rubber powder, which is applied in the processing of tar asphalt/petroleum asphalt/natural asphalt, building components, building insulation materials, etc. , to achieve the effect of simple method, enhanced slip resistance and good storage performance

Active Publication Date: 2005-04-27
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When this asphalt modifier is mixed with asphalt, the problem of storage stability is still not solved, and waste tire rubber is a thermosetting rubber, which cannot be melted effectively by heating at high temperature, so this method is not suitable for waste tire rubber
In the article "New Building Materials 2001 Eleventh Issue "Application Practice of Waste Rubber Powder Modified Asphalt", the author mentioned that before the rubber powder is added to the asphalt, it should be modified first, adding so-called free radicals to the surface, and then added to the Asphalt, so that the system is stable, but the process is complicated

Method used

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  • Waste rubber powder modified asphalt and its prepn process
  • Waste rubber powder modified asphalt and its prepn process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 400 grams of penetration (25°C, 0.1mm): base asphalt of 89, heat and melt first; add 3% SBS rubber (the SBS rubber used in the examples is from Yueyang Petrochemical), and shear at 175°C for 60 minutes; Then add 2% 80-mesh sieved waste tire rubber powder, and add 0.5g of zinc oxide at the same time, and continue shearing by a high-shear mixer for 60 minutes at the same temperature. The main performance indicators of the obtained asphalt products are: penetration (25°C, 0.1mm): 80, ductility (5°C, 5cm / min, cm): 57, softening point (°C): 57.9, segregation test, softening up and down The point difference (°C) is -1.6, indicating that the waste rubber powder particles are uniformly dispersed in the asphalt and have good storage stability.

Embodiment 2

[0025] 400g penetration (25°C, 0.1mm): 122 base asphalt, heat and melt first; then add 1% SBS rubber, cut at 160°C for 30 minutes; then add 5% 140 mesh waste tire rubber powder , while adding 2.0 g of zinc oxide, shearing at 180° C. by a high-shear mixer for 120 minutes. The main performance indicators of the obtained asphalt products are: penetration (25°C, 0.1mm): 104, ductility (5°C, 5cm / min, cm): 11, softening point (°C): 48.1, segregation test, softening up and down Point difference (°C): -2.3, storage stability qualified.

Embodiment 3

[0027] Compared with Example 2, this example is different in that the amount of SBS added is increased. In this example, 4% SBS rubber is added, and the particle size of the rubber powder is 200 mesh. The main performance indicators of the obtained asphalt products are: penetration (25°C, 0.1mm): 94, ductility (5°C, 5cm / min, cm): 46, softening point (°C): 56.6, segregation test, softening up and down Point difference (°C): -1.2, indicating that the waste rubber powder particles are evenly dispersed in the asphalt, and the performance of the obtained asphalt product is relatively good.

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Abstract

The present invention provides one kind of waste rubber powder modified asphalt and its preparation process. In the temperature of 150-200 deg.c, waste tyre rubber powder of different grain size within 60 mesh, thermoplastic rubber and stabilizer in certain proportion are added into asphalt; and the mixture is processed in high shearing apparatus or colloid mill to prepare the asphalt product with high storage stability and excellent high and low temperature performance. The simple production process is suitable for industrial production.

Description

technical field [0001] The invention relates to rubber-modified asphalt and a preparation method thereof, in particular to a storage-stable waste rubber-modified asphalt and a preparation method thereof. Background of the invention [0002] With the continuous improvement of the road traffic system and the rapid development of the social economy and the automobile industry, the amount of waste tires produced by various vehicles has increased year by year. Except for the rubber industry and other industries that can be partially utilized, there is still a considerable surplus. [0003] At present, the methods of processing and utilizing waste tire rubber mainly include cracking, as building material additives or fillers, and as road asphalt additives. The pyrolysis method has the disadvantages of complex process, difficult operation, poor product quality, and easy environmental pollution. As a building material, it can only be used as felt paper, rubber tile, rubber plate, e...

Claims

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Application Information

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IPC IPC(8): C08L95/00C10C3/00
Inventor 张建峰宁爱民郭皎河付丽李永泰
Owner CHINA PETROLEUM & CHEM CORP
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