A kind of preparation method of waste rubber pyrolysis conversion modified asphalt

A technology for modifying asphalt and waste rubber, used in building components, building insulation materials, buildings, etc., can solve the problems of large amount of asphalt mixing, difficult dispersion and settlement of rubber powder, and achieve excellent high and low temperature performance and improve compatibility. performance, improve performance

Active Publication Date: 2017-05-31
JIANGYIN BAO LI ASPHALT CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, due to the spiral discharge function of the atmospheric pressure and high temperature double-screw desulfurization equipment, it is suitable for the preparation of asphalt-like materials. This type of asphalt material is not only easy to disperse into asphalt, but also has a large amount of admixture in asphalt and converts asphalt, thereby solving the problem of rubber powder in asphalt. Moderately difficult dispersion and settling problems

Method used

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  • A kind of preparation method of waste rubber pyrolysis conversion modified asphalt

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Experimental program
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Effect test

Embodiment 1

[0033] Step 1: In terms of mass fraction, add 4 parts of SBS to 96 parts of 70#SK asphalt, and perform high-speed shearing at 170-190°C for 45 minutes, and the shearing speed is 3000r / min.

[0034] Step 2: Transfer the sheared SBS modified asphalt to a high-speed disperser and stir for 150 minutes at a stirring speed of 800-900r / min. During the process, add a total of 0.15 parts of sulfur to prepare modified asphalt.

[0035] The prepared modified asphalt is numbered 1, and its properties are shown in Table 1.

Embodiment 2

[0037]Step 1: Add 20 mesh waste tire whole rubber powder into the atmospheric pressure and high temperature double-screw desulfurization equipment, and at 300 ° C, after 20 minutes, the waste rubber is pyrolyzed into asphalt-like materials. In parts by mass, 30 parts of The waste rubber pyrolysis-like asphalt material and 70 parts of SK re-crossed asphalt were mixed in the asphalt tank to prepare the waste rubber pyrolysis and converted asphalt mother liquor. The mixing temperature was 160°C, the speed was 50r / min, and the time was 10min.

[0038] Step 2: Add 0.2% sulfur to the above mother liquor, at 170-190 ℃ Under the condition of high-speed shearing for 60min, the shearing speed is 4000r / min. The sheared modified asphalt is transferred to a high-speed disperser and stirred for 120 minutes, and the stirring speed is 800-900 r / min to obtain 40% waste rubber cracked and converted into asphalt.

[0039] The number of the obtained modified asphalt is 2, and the properties are ...

Embodiment 3

[0041] Step 1: Add 20 mesh waste tire whole rubber powder into the normal pressure and high temperature double-helix cracking equipment, and at 300 ° C, after 20 minutes, the waste rubber is pyrolyzed into asphalt-like materials. In parts by mass, 30 parts of waste rubber high-temperature cracking products and 70 parts of re-crossed asphalt were mixed in an asphalt tank to prepare a waste rubber cracking and converted asphalt mother liquor. The mixing temperature was 160 ° C, the rotating speed was 50 r / min, and the time was 10min.

[0042] Step 2: In terms of mass percentage, add 0.2% sulfur to the mother liquor, add 4% SBS, and perform high-speed shearing at 170-190° C. for 60 minutes, and the shearing speed is 4000 r / min. The sheared modified asphalt is transferred to a high-speed disperser for 120 minutes, and the stirring speed is 800-900 r / min to obtain the SBS modified waste rubber cracked and converted into asphalt.

[0043] The number of the obtained modified asphalt...

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Abstract

The invention relates to a method for preparing rubber waste cracking converted modified asphalt. The method mainly comprises the following steps: allowing rubber waste powder to go through a normal pressure double helix device, carrying out high temperature processing at 260-360DEG C for 10-30min to realize cracking conversion of the rubber waste in order to form a viscous asphalt material, adding the viscous asphalt material to heavy duty asphalt, stirring to obtain a rubber waste cracking converted asphalt mother liquor, adding 1-6wt% of SBS, and carrying out shearing dispersion to obtain the high performance modified asphalt. An apparatus for preparing cracking converted rubber has the characteristics of low cost, high conversion efficiency, environmental protection and safety, and the modified asphalt obtained through cracking converted rubber and heavy duty asphalt mixing and SBS modification has the characteristics of stable heat storage, excellent high and low temperature performances and excellent ultraviolet resistance, and makes the rubber waste have good economic and environmentally-friendly benefits.

Description

technical field [0001] The invention relates to the field of road asphalt modification, in particular to a preparation method of waste rubber cracking conversion modified asphalt. Background technique [0002] As a cementing material, asphalt has the advantages of waterproof, insulation, corrosion resistance, etc., and has a good bonding effect with stone ore materials. It has been widely used as road construction materials for a long time. In recent years, with the increase in traffic volume and traffic load, people have put forward more stringent requirements for road paving asphalt materials, but ordinary asphalt is prone to rutting at high temperature, easy to crack at low temperature, easy to age, and has a short life, which cannot fully meet the actual situation. need. Generally, polymers are added and dispersed into asphalt to prepare polymer-modified asphalt, which can effectively improve the high and low temperature performance of asphalt. [0003] Among the polym...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L21/00C08L53/02C08K3/06C08J11/10
CPCY02W30/62
Inventor 周文婷朱亚琴王仕峰韩君李福建丁莉娜陶红
Owner JIANGYIN BAO LI ASPHALT CO LTD
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