Waste rubber powder/styrene-butadiene-styrene (SBS) composite modified asphalt and production process thereof

A technology of composite modified asphalt and production process, which is applied in the direction of building components, building insulation materials, buildings, etc., can solve the problems of long process route, prolong production time, expensive and other problems, and achieve the effect of simple production process and low energy consumption

Inactive Publication Date: 2011-09-14
JIANGYIN TAIFU ASPHALTUM
6 Cites 39 Cited by

AI-Extracted Technical Summary

Problems solved by technology

The softening point and ductility of ordinary waste rubber-modified asphalt are relatively low. Although it basically meets the industry standard of rubber-modified asphalt, it is different from the "Technical Specifications for Construction of Highway Asphalt Pavement" JTG F40-2004 Polymer Modified Asphalt Standard and Expressway Management The technic...
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Abstract

The invention discloses a waste rubber powder/styrene-butadiene-styrene (SBS) composite modified asphalt and a production process thereof. The waste rubber powder/SBS composite modified asphalt comprises 0.03 weight percent of activating agent, 0.1 weight percent of penetrating agent, 15 to 25 weight percent of waste rubber powder, 0.1 to 0.4 weight percent of SBS, 1 to 4 weight percent of aromatic oil and the balance of base asphalt. The preparation process of the modified asphalt comprises the following steps of: heating and melting the base asphalt at high temperature, adding the penetrating agent, the waste rubber powder, SBS, the aromatic oil and the activating agent into the base asphalt, stirring and swelling, and performing cyclic shear by using a high-speed shearing machine to obtain the waste rubber powder/SBS composite modified asphalt. The waste rubber powder/SBS composite modified asphalt has the characteristics of high softening point, high ductility and the like, and low cost. The production process of the waste rubber powder/SBS composite modified asphalt is simple and reasonable and is low in energy consumption.

Application Domain

Technology Topic

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  • Waste rubber powder/styrene-butadiene-styrene (SBS) composite modified asphalt and production process thereof

Examples

  • Experimental program(5)

Example Embodiment

[0018] Example 1
[0019] The present invention is a waste rubber powder/SBS composite modified asphalt. Its components include activator 0.3wt‰, penetrant 1wt‰, waste rubber powder 20wt%, SBS 0.2wt%, aromatic oil 2wt%, and the rest is base asphalt .
[0020] Among them, the activator is sulfur; the penetrant is diesel.
[0021] Among them, the particle size of the waste rubber powder is 30 mesh, and the content of natural rubber hydrocarbons in the waste rubber powder is 35%.
[0022] Taking the above waste rubber powder/SBS composite modified asphalt as an example, the production process includes the following processing steps:
[0023] The first step: heating the base asphalt in the reactor to a temperature of 180℃ to melt;
[0024] The second step: heat preservation and stirring of the base asphalt, add waste rubber powder, penetrant, SBS, aromatic oil, and activator to the above base asphalt at a temperature of 180~185℃ to swell, and at the same time turn on the high-speed shear cycle connected to the reactor After shearing, waste rubber powder/SBS composite modified asphalt is obtained.
[0025] In the above process steps, in the second step, the activator is added to the base asphalt after the waste rubber powder, penetrant, SBS, and aromatic oil.
[0026] In the above process steps, the time for swelling and cyclic shearing is 2.5 hours, and the speed of the high-speed shearing machine is 2000 revolutions per minute.

Example Embodiment

[0027] Example 2
[0028] The present invention is a waste rubber powder/SBS composite modified asphalt. Its components include activator 0.3wt‰, penetrant 1wt‰, waste rubber powder 20wt%, SBS 0.3wt%, aromatic oil 2wt%, and the rest is base asphalt .
[0029] Among them, the activator is sulfur and the penetrant is diesel.
[0030] Wherein, the particle size of the waste rubber powder is 30 mesh, and the content of natural rubber hydrocarbons in the waste rubber powder is 35%.
[0031] Taking the above waste rubber powder/SBS composite modified asphalt as an example, the production process includes the following processing steps:
[0032] Step 1: Heat the base pitch in the reactor to 190℃ to melt;
[0033] The second step: heat preservation and stirring of the base asphalt, add waste rubber powder, penetrant, SBS, aromatic oil, and activator to the above base asphalt at a temperature of 180~185℃ to swell, and at the same time turn on the high-speed shear cycle connected to the reactor After shearing, waste rubber powder/SBS composite modified asphalt is obtained.
[0034] In the above process steps, in the second step, the activator is added to the base asphalt after the waste rubber powder, penetrant, SBS, and aromatic oil.
[0035] In the above process steps, the time for swelling and cyclic shearing is 2.5 hours, and the speed of the high-speed shearing machine is 2000 revolutions per minute.

Example Embodiment

[0036] Example 3
[0037] The present invention is a waste rubber powder/SBS composite modified asphalt. Its components include activator 0.3wt‰, penetrant 1wt‰, waste rubber powder 20wt%, SBS 0.4wt%, aromatic oil 2wt%, and the rest is base asphalt .
[0038] Wherein, the activator is sulfur, and the penetrant is diesel.
[0039] Wherein, the particle size of the waste rubber powder is 30 mesh, and the content of natural rubber hydrocarbons in the waste rubber powder is 35%.
[0040] Taking the above waste rubber powder/SBS composite modified asphalt as an example, the production process includes the following processing steps:
[0041] Step 1: Heat the base pitch in the reactor to 190℃ to melt;
[0042] The second step: heat preservation and stirring of the base asphalt, add waste rubber powder, penetrant, SBS, aromatic oil, and activator to the above base asphalt at a temperature of 180~185℃ to swell, and at the same time turn on the high-speed shear cycle connected to the reactor After shearing, waste rubber powder/SBS composite modified asphalt is obtained.
[0043] In the above process steps, in the second step, the activator is added to the base asphalt after the waste rubber powder, penetrant, SBS, and aromatic oil.
[0044] In the above process steps, the time for swelling and cyclic shearing is 2.5 hours, and the speed of the high-speed shearing machine is 2000 revolutions per minute.
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the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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