Preparation method of environment-friendly type composite modified asphalt

A composite modified asphalt, environmentally friendly technology, applied in building thermal insulation materials, building components, construction and other directions, can solve the problems of low rubber powder content, high asphalt cost, long processing process, etc., achieve good UV resistance, reduce water Pollution, good environmental protection effect

Active Publication Date: 2019-05-03
JIANGSU BAOLI INT INVESTMENT CO LTD +1
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  • Application Information

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Problems solved by technology

The timeliness of the preparation method of this method is high, but aging is still unavoidable, and the content of rubber powder added is low at the same time, so that the cost of asphalt produced is relatively high
[0006] CN102181163A uses the method of composite modified asphalt that the rubber powder is sheared in the asphalt for a long time, and then causes the composite modified asphalt that is stable in thermal storage, but the process is longer, the cost is higher, and the pollution is larger

Method used

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  • Preparation method of environment-friendly type composite modified asphalt

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preparation example Construction

[0033] A preparation method of environment-friendly composite modified asphalt, comprising three steps of preparation of instant adhesive masterbatch, preparation of instant adhesive mother liquor and co-crosslinking development of instant adhesive mother liquor and SBS, specifically:

[0034] Step 1: Preparation of instant rubber masterbatch: Desulfurize the tire rubber powder through a multi-stage screw continuous desulfurization process, then extrude the screw and granulate to obtain instant rubber masterbatch;

[0035] Step 2: Preparation of instant adhesive mother liquor: mix the instant adhesive masterbatch and base asphalt obtained in step 1 in a mass ratio of 32 / 68-65 / 35, and let the instant adhesive masterbatch be in the base asphalt at a temperature of 160-170°C Soak and develop for 0.5-1.5 hours, then cut in high-speed shearing equipment for 15-30 minutes, so that the rubber powder is micro-nano dispersed, and the instant glue mother solution is obtained;

[0036]St...

Embodiment 1

[0049] (1) Mix 30 parts by mass of instant adhesive masterbatch and 70 parts by mass of AH70# base asphalt in a pre-development tank, and swell and develop for 1 hour at a temperature of 160°C.

[0050] (2) The mixture in step (1) was sheared at high speed for 15 minutes by a high-speed shearing machine to obtain the mother liquor of instant glue.

[0051] (3) the instant glue mother liquor that step (2) obtains and SBS modifying agent are mixed by the mass ratio of 96 / 4, and SBS modifying agent is the star SBS (mass average molecular weight is 300,000) purchased from Yueyang Petrochemical, in Shear on a high-speed shear for 30 minutes, the shear rate is 3000r / min, and the temperature is controlled at 170°C.

[0052] (4) Add 0.5%wt (based on the total mass of the product) of sulfur-based crosslinking stabilizer as a co-crosslinking stabilizer, stir for 60 minutes, and develop an environmentally friendly composite modified asphalt after sufficient stirring and development, No. ...

Embodiment 2

[0054] (1) Mix 40 parts by mass of instant adhesive masterbatch and 60 parts by mass of AH70# base asphalt in a pre-development tank, and swell and develop for 1 hour at a temperature of 160°C.

[0055] (2) The mixture in step (1) was sheared at high speed for 25 minutes by a high-speed shearing machine to obtain the mother liquor of instant glue.

[0056] (3) the instant glue mother liquor that step (2) obtains and SBS modifying agent are mixed by the mass ratio of 96 / 4, and SBS modifying agent is the star SBS (mass average molecular weight is 300,000) purchased from Yueyang Petrochemical, in Shear on a high-speed shear for 30 minutes, the shear rate is 3500 r / min, and the temperature is controlled at 170°C.

[0057] (4) Add 0.6%wt (based on the total mass of the product) epoxy rubber crosslinking stabilizer as a co-crosslinking stabilizer, stir for 120min, and develop an environmentally friendly composite modified asphalt after sufficient stirring and development, No. 2.

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Abstract

The invention discloses a preparation method of an environment-friendly type composite modified asphalt. The preparation method comprises three steps including quick dissolving rubber master batch preparation, quick dissolving rubber mother liquor preparation, and co-crosslinking growth with SBS. The preparation method comprises following specific steps: 1, quick dissolving rubber master batch preparation, wherein tyre rubber powder is subjected to multi-stage screw continuous desulphurization technology for desulphurization, and is subjected to screw extrusion and granulation so as to obtainthe quick dissolving rubber master batch; 2, quick dissolving rubber mother liquor preparation, wherein the quick dissolving rubber master batch and matrix asphalt are mixed at a mass ratio of 32 / 68-65 / 35, immersion growth is carried out, and shearing using a high speed shearing equipment is carried out so as to obtain the quick dissolving rubber mother liquor; and 3, co-crosslinking growth, wherein the quick dissolving rubber mother liquor and SBS modifying agent are mixed, a co-crosslinking stabilizing agent is added into an obtained mixed product, and stirring growth is carried out so as toobtain the environment-friendly type composite modified asphalt finished product. The preparation method is capable of realizing recycling of a large amount of waste tyre, and is excellent in environment protection performance; the produced finished product possesses both high and low temperature performance, is excellent in middle temperature antifatigue performance, and noise reduction performance, and high in ultraviolet ray resistant intensity; deformation degree is low; and the hardness is larger.

Description

technical field [0001] The invention belongs to the field of asphalt material modification, and in particular relates to a preparation method of environment-friendly composite modified asphalt. Background technique [0002] With the rapid development of society, the rapid growth of traffic flow and the emergence of extreme weather not only cause cracks, rutting, aging and other problems on the asphalt pavement of existing roads, but also greatly reduce the service life, and it is difficult to meet the requirements of heavy-duty traffic pavement and steel bridge. Surface and drainage asphalt pavement and other high-grade pavement. It is an effective way to improve the performance of asphalt by adding high-content SBS modifier, but high-content SBS-modified asphalt is unstable, difficult to process and high in cost, and the relationship between SBS and compatibilizer is only one This kind of physical effect, weak force, makes SBS particles easy to aggregate during storage, re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/00C08J3/24C08L95/00C08L17/00C08L53/02C08J11/10C08L21/00C08K3/06
CPCY02W30/62
Inventor 周文彬徐思田白皓文张欢朱亚琴陶红马丕明
Owner JIANGSU BAOLI INT INVESTMENT CO LTD
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