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Novel SBS modified asphalt containing synchronous warm mixing regenerant and preparation method of novel SBS modified asphalt

A technology of warm mix regenerant and modified asphalt, applied in building thermal insulation materials, building components, buildings, etc., can solve the problems of poor regeneration effect of recycled SBS modified asphalt, avoid secondary aging, high economic benefits, and repair Efficient effect

Active Publication Date: 2022-08-09
HUBEI CHANGJIANG ROAD & BRIDGE HLDG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of this, the present invention aims to provide a kind of novel SBS modified asphalt containing synchronous warm mix regenerator, to solve the regeneration effect of existing regeneration SBS modified asphalt bad question

Method used

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  • Novel SBS modified asphalt containing synchronous warm mixing regenerant and preparation method of novel SBS modified asphalt
  • Novel SBS modified asphalt containing synchronous warm mixing regenerant and preparation method of novel SBS modified asphalt
  • Novel SBS modified asphalt containing synchronous warm mixing regenerant and preparation method of novel SBS modified asphalt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A new type of SBS modified asphalt containing a synchronous warm-mix regenerant is specifically prepared by the following method:

[0036] 1) by weight, take by weighing 85 parts of SBS modified asphalt, 5 parts of cashew nut shell oil, 3 parts of thiocyanate, 3 parts of Sasobit warm mix agent, 4 parts of SBR latex;

[0037] 2) heating the above-mentioned 85 parts of SBS modified asphalt to 135°C;

[0038] 3) Keep the temperature of the above-mentioned SBS modified asphalt at 135°C, adjust the rotating speed of the high-speed shearing machine to 1350 rpm, then pour the above-mentioned 4 parts of the SBR latex into the SBS modified asphalt at a constant speed, when the SBR latex is completely added, the rotating speed is Adjust to 3800rpm, shear and stir for 20min;

[0039] 4) keep the above-mentioned temperature (135 ℃) unchanged, adjust the rotating speed to 2000rpm, add the above-mentioned 3 parts of Sasobit warm mixes at a constant speed and continue shearing and st...

Embodiment 2

[0049] The difference between the new SBS modified asphalt containing synchronous warm-mix regenerant in this example and Example 1 is that the raw materials used in the preparation process of the new SBS modified asphalt containing synchronous warm-mix regenerant are: by weight, SBS 85 parts of modified asphalt, 5 parts of cashew nut shell oil, 3 parts of triallyl isocyanurate, 3 parts of Sasobit warm mix agent, 4 parts of SBR latex, the others are the same as in Example 1.

[0050] Weigh 100 parts by mass of the aged SBS modified asphalt heated to 135°C, add 100 parts by mass of the new SBS modified asphalt containing the synchronous warm-mix regenerant of Example 2 of the present invention, keep the temperature at 135°C, and stir at 400 rpm. In 15 minutes, a new type of SBS modified asphalt containing synchronous warm-mix regenerant was prepared.

[0051] The performance test of the synchronously regenerated warm mix SBS modified asphalt shows that the softening point is 77...

Embodiment 3

[0054] The difference between the new SBS modified asphalt containing synchronous warm-mix regenerant in this example and Example 1 is that the raw materials used in the preparation process of the new SBS modified asphalt containing synchronous warm-mix regenerant are: by weight, SBS 80 parts of modified asphalt, 8 parts of waste engine oil, 5 parts of genipin, 3 parts of Sasobit warm mix agent, 4 parts of SBR latex, the others are the same as in Example 1.

[0055] Weigh 100 parts by mass of the aged SBS modified asphalt heated to 135°C, add 100 parts by mass of the new SBS modified asphalt containing the synchronous warm-mix regenerant of Example 3 of the present invention, keep the temperature at 135°C, and stir at 400 rpm. In 15 minutes, a new type of SBS modified asphalt containing synchronous warm-mix regenerant was prepared.

[0056] The performance test of the synchronously regenerated warm mix SBS modified asphalt shows that the softening point is 78°C, the ductility ...

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Abstract

The invention discloses novel SBS modified asphalt containing a synchronous warm mixing regenerant and a preparation method of the novel SBS modified asphalt, and relates to the technical field of new materials for road engineering. The novel SBS modified asphalt containing the synchronous warm mixing regenerant is prepared from the following components in percentage by mass: 78 to 89 percent of SBS modified asphalt, 5 to 10 percent of colloid structure regulator, 1 to 3 percent of SBS cross-linking agent, 3 to 5 percent of warm mixing agent and 2 to 4 percent of warm mixing compensating agent. The warm-mixing recycled asphalt disclosed by the invention not only can recover the colloid structure stability of the aged SBS modified asphalt, but also can repair the three-dimensional network molecular structure of the SBS, so that a synchronous regeneration effect is achieved; meanwhile, the mixing, paving and rolling temperatures of the asphalt mixture can be obviously reduced, the secondary aging of the waste SBS asphalt is avoided, the adverse effect of the addition of the warm mixing agent on the rheological property of the asphalt is reduced under the action of the warm mixing compensating agent, and the in-situ large-proportion recycling of the waste SBS asphalt mixture on the full-thickness structural layer of the pavement is promoted.

Description

technical field [0001] The invention relates to the technical field of new materials for road engineering, in particular to a novel SBS modified asphalt containing a synchronous warm-mix rejuvenating agent and a preparation method thereof. Background technique [0002] Styrene-butadiene-styrene triblock copolymer (SBS for short) modified asphalt (prepared from SBS copolymer and base asphalt in a certain proportion) can significantly improve the high and low temperature performance and fatigue resistance of asphalt, so , since the 1990s, it has been widely used in asphalt pavement pavement by countries all over the world. At present, among the high-grade pavements in my country, the occupancy rate of asphalt pavement is as high as 90%. The upper layer of these high-grade asphalt pavement layers has generally used SBS modified asphalt mixture, and the proportion of its use in the middle and lower layers is also increasing year by year. However, once the asphalt pavement is b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L53/02C08L91/00C08L9/08C08K5/378C08K5/1545C08K5/29C08K5/3492
CPCC08L95/00C08L53/02C08L91/00C08L9/08C08K5/378C08K5/1545C08K5/29C08K5/34924Y02A30/30
Inventor 倪志军张德润孙涛周坤王丽静赵阳汪亮郭哲罗锋莫国雄许培欣苗雨阮滨
Owner HUBEI CHANGJIANG ROAD & BRIDGE HLDG