Warm mixing modified rubber asphalt and preparation method thereof

A technology for modifying rubber and asphalt, applied in building thermal insulation materials, building components, buildings, etc., can solve the problems of complex preparation process, low road performance, low preparation efficiency, etc. Efficient effect

Active Publication Date: 2022-03-22
江苏宝利路面材料技术有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problems of complex preparation process, high preparation temperature, low preparation efficiency, low road performance and high production cost in the prior art, the present invention provides a warm-mix modified rubber asphalt and its preparation method, in order to effectively solve The barriers existing in the warm mix rubber asphalt mentioned above

Method used

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  • Warm mixing modified rubber asphalt and preparation method thereof

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preparation example Construction

[0032] The above-mentioned method for preparing warm-mixed modified rubber asphalt comprises the following steps:

[0033] 1) In parts by mass, 50-100 parts of waste rubber powder and 5-15 parts of modifier are modified in an internal mixer to prepare modified waste rubber powder;

[0034] (2) In parts by mass, take 15 to 30 parts of the modified waste rubber powder prepared in step (1), 2 to 8 parts of warm mixing agent, 0.4 to 2 parts of catalytic aid and 2 to 2 parts of viscosity reducer Add 10 parts to 80-100 parts of asphalt in turn, heat to 140-150°C, and react with shearing and stirring for 40-60 minutes at a stirring rate of 600-900 rpm;

[0035] (3) After the reaction time is over, add 0.2 to 3 parts of stabilizer to step (2), keep warm for 60 to 90 minutes at a stirring rate of 400 to 600 rpm, and keep warm at a temperature of 140 to 150°C to obtain a warm-mixed modified Rubberized asphalt.

Embodiment 1

[0037] A warm-mix modified rubber asphalt and a preparation method thereof. The preparation method comprises the following steps:

[0038] (1) In parts by mass, 60 parts of waste rubber powder and 5 parts of maleic anhydride were modified in an internal mixer to prepare maleic anhydride modified waste rubber powder.

[0039] (2) In terms of parts by mass, take 15 parts of the maleic anhydride modified waste rubber powder prepared in step (1), 2 parts of surface active warm mixing agent, 0.6 part of methyl succinic acid and 4 parts of fatty amide Add 100 parts of asphalt at 150°C successively, and react with shearing and stirring for 40 minutes at a stirring rate of 600 rpm.

[0040] (3) After the reaction time is over, add 0.2 parts of sulfur to step (2), keep warm for 60 minutes at a stirring rate of 400 rpm, and keep warm at 150°C to prepare warm-mix modified rubber asphalt.

Embodiment 2

[0042] A warm-mix modified rubber asphalt and a preparation method thereof. The preparation method comprises the following steps:

[0043] (1) In parts by mass, 70 parts of waste rubber powder and 8 parts of phthalic acid were modified in an internal mixer to prepare phthalic acid modified waste rubber powder.

[0044] (2) In terms of parts by mass, take 20 parts of the phthalic acid modified waste rubber powder prepared in step (1), 5 parts of organic viscosity-reducing warm mixing agent, 1 part of isopropylacrylamide and oxidation 7 parts of polyethylene wax were sequentially added to 100 parts of asphalt at 140°C, and reacted with shearing and stirring for 40 minutes at a stirring rate of 600 rpm.

[0045] (3) After the reaction time is over, add 1 part of sulfur to step (2), keep stirring at 400 rpm for 60 minutes, and keep warm at 140°C to prepare warm-mixed modified rubber asphalt.

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Abstract

The invention discloses warm mixing modified rubber asphalt and a preparation method thereof, and the warm mixing modified rubber asphalt comprises the following components in parts by mass: 80-100 parts of asphalt, 15-30 parts of modified waste rubber powder, 2-8 parts of a warm mixing agent, 0.4-2 parts of a catalytic promoter, 0.2-3 parts of a stabilizer and 2-10 parts of a viscosity reducer, wherein preparation raw materials of the modified waste rubber powder comprise the following components in parts by mass: 50-100 parts of waste rubber powder and 5-15 parts of a modifier, and the specific preparation method comprises the following steps: carrying out modification treatment on the waste rubber powder in an internal mixer to prepare the modified waste rubber powder, adding the prepared modified waste rubber powder, a warm mixing agent, a catalytic promoter, a stabilizer and a viscosity reducer into hot asphalt, and uniformly mixing to obtain the modified waste rubber powder. And continuously heating, shearing and stirring, and reacting for a certain time. The preparation temperature of the traditional warm-mixed rubber asphalt and the construction temperatures of mixture production, paving, rolling and the like are effectively reduced, and the viscosity of the traditional warm-mixed rubber asphalt is also reduced, so that high energy consumption and emission of harmful gases in the production and construction processes are avoided.

Description

technical field [0001] The invention belongs to the technical field of asphalt pavement materials, and in particular relates to a warm-mixed modified rubber asphalt and a preparation method thereof. Background technique [0002] Rubber asphalt, as a new type of environmentally friendly material in the field of road engineering, can not only improve the high-temperature anti-rutting, low-temperature anti-cracking and anti-aging properties of asphalt mixture, but also effectively reduce road noise and effectively resist the impact of heavy-duty traffic and severe weather. More importantly, the cost of waste rubber is low, and while improving the performance of asphalt, it can also consume a large amount of solid waste, which is more conducive to resource recycling and environmental protection. For rubber asphalt, domestic patents include: CN111303645B, CN111303645B, CN111303645B and CN111675914A, etc. However, the problem that the patents that have been granted or applied for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L19/00C08L51/04C08K5/092C08K5/20C08K3/06
CPCC08L95/00C08L19/003C08L51/04C08K5/092C08K5/20C08K3/06Y02A30/30
Inventor 孔佩佩周文彬武精科邓文华陶红张龙生
Owner 江苏宝利路面材料技术有限公司
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