CN102732279A - Application of residual oil of waste tire pyrolysis oil in preparing and modifying road asphalt - Google Patents
Application of residual oil of waste tire pyrolysis oil in preparing and modifying road asphalt Download PDFInfo
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- 239000010426 asphalt Substances 0.000 title claims abstract description 74
- 239000010920 waste tyre Substances 0.000 title claims abstract description 70
- 238000000197 pyrolysis Methods 0.000 title claims abstract description 57
- 238000009835 boiling Methods 0.000 claims abstract description 13
- 238000002360 preparation method Methods 0.000 claims abstract description 11
- 238000005292 vacuum distillation Methods 0.000 claims abstract description 7
- 238000004821 distillation Methods 0.000 claims abstract 2
- 238000002156 mixing Methods 0.000 claims description 3
- 239000003208 petroleum Substances 0.000 abstract description 14
- 238000012986 modification Methods 0.000 abstract description 7
- 230000004048 modification Effects 0.000 abstract description 7
- 238000003912 environmental pollution Methods 0.000 abstract description 4
- 238000002485 combustion reaction Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 31
- 229920001971 elastomer Polymers 0.000 description 16
- 239000005060 rubber Substances 0.000 description 16
- 230000035515 penetration Effects 0.000 description 14
- 239000000843 powder Substances 0.000 description 14
- 239000011159 matrix material Substances 0.000 description 11
- 239000000203 mixture Substances 0.000 description 8
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 4
- 238000004064 recycling Methods 0.000 description 4
- 239000002699 waste material Substances 0.000 description 3
- SVTBMSDMJJWYQN-UHFFFAOYSA-N 2-methylpentane-2,4-diol Chemical compound CC(O)CC(C)(C)O SVTBMSDMJJWYQN-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000000084 colloidal system Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000003607 modifier Substances 0.000 description 2
- 229930195734 saturated hydrocarbon Natural products 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- LXOFYPKXCSULTL-UHFFFAOYSA-N 2,4,7,9-tetramethyldec-5-yne-4,7-diol Chemical group CC(C)CC(C)(O)C#CC(C)(O)CC(C)C LXOFYPKXCSULTL-UHFFFAOYSA-N 0.000 description 1
- 241000255925 Diptera Species 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 229940051250 hexylene glycol Drugs 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000001935 peptisation Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
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- Compositions Of Macromolecular Compounds (AREA)
- Working-Up Tar And Pitch (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
Abstract
本发明涉及一种废轮胎热解油中的渣油在制备和改性道路沥青中的应用，将各种条件下生产出的废轮胎热解油进行减压蒸馏，除去轻馏分，获取初馏点为300～550℃的渣油，作为制备道路沥青的基质沥青；将废轮胎热解油中初馏点300～550℃的渣油与基质沥青进行混合，废轮胎热解渣油的掺入量为总体0.1～50％(wt)，总体为废轮胎热解渣油和基质沥青；在剪切温度50～250℃、剪切速率500～5000r/min、剪切时间1～60min的条件下，改性基质沥青，得到改性沥青。本发明为废轮胎热解渣油提供一条高价值的应用途径，克服了废轮胎热解渣油直接燃烧而产生环境污染的问题，降低对石油资源的依赖程度。The invention relates to the application of residual oil in waste tire pyrolysis oil in the preparation and modification of road asphalt. The waste tire pyrolysis oil produced under various conditions is subjected to vacuum distillation to remove light fractions and obtain initial distillation The residual oil with a temperature of 300-550 °C is used as the base asphalt for preparing road asphalt; the residual oil with an initial boiling point of 300-550 °C in the waste tire pyrolysis oil is mixed with the base asphalt, and the waste tire pyrolysis residue is blended The total amount is 0.1-50% (wt), and the total is waste tire pyrolysis residue and base asphalt; under the conditions of shear temperature 50-250°C, shear rate 500-5000r/min, and shear time 1-60min , to modify the base asphalt to obtain the modified asphalt. The invention provides a high-value application path for the waste tire pyrolysis residue, overcomes the problem of environmental pollution caused by direct combustion of the waste tire pyrolysis residue, and reduces the dependence on petroleum resources.
Description
【技术领域】 【Technical field】
本发明涉及废轮胎回收技术领域，具体地说，是一种废轮胎热解油中的渣油在制备和改性道路沥青中的应用。The invention relates to the technical field of recycling waste tires, in particular to the application of residual oil in pyrolysis oil of waste tires in the preparation and modification of road asphalt.
【背景技术】 【Background technique】
近年米，随着经济社会发展和人民生活水平的提高，我国汽车产销量快速增长，2009年跃居世界首位。与此同时，废轮胎的产生量也迅速增加，已超过了2亿条。越来越多的废轮胎形成的“黑色污染”正在给我们的生存环境带来严重威胁。废轮胎具有很强的抗热、抗生物、抗机械性，在自然状态下难以降解，长期堆放在露天，不仅占用大量土地，而且极易滋生蚊虫，传播疾病，引发火灾，污染环境。In recent years, with the economic and social development and the improvement of people's living standards, my country's automobile production and sales have grown rapidly, ranking first in the world in 2009. At the same time, the generation of waste tires has also increased rapidly, exceeding 200 million pieces. The "black pollution" formed by more and more waste tires is posing a serious threat to our living environment. Waste tires are highly resistant to heat, organisms, and machinery, and are difficult to degrade in the natural state. If they are piled up in the open air for a long time, they not only occupy a lot of land, but also easily breed mosquitoes, spread diseases, cause fires, and pollute the environment.
因此，合理循环利用我国丰富的废轮胎资源，对于缓解我国资源匮乏，改善生态环境，发展循环经济，建立节约型社会意义重大。Therefore, the reasonable recycling of my country's rich waste tire resources is of great significance for alleviating the shortage of resources in our country, improving the ecological environment, developing a circular economy, and establishing a conservation-oriented society.
废轮胎回收利用方式主要有以下五种：(1)直接用作港口码头的护舷；(2)废轮胎粉碎制成胶粉；(3)废轮胎热解获取油品、炭黑、可燃气体和钢丝；(4)废轮胎制作成再生胶；(5)废轮胎直接燃烧发电。其中，热解是一种将废轮胎彻底地分解为各种可用资源的技术，具有处理量大、效益高和环境污染小等特点，更符合废弃物处理的资源化、无害化和减量化原则，因而被认为是废轮胎资源化处理的最佳途径之一。废轮胎热解后可获得可燃气体、热解油、热解炭、钢丝，其中热解油是废轮胎热解的主要产物，收率一般可达到40～60％，可见热解油的高效利用对于提高废轮胎热解技术的经济性至关重要，更重要的是还能降低对石油资源的依赖。There are five main methods of recycling waste tires: (1) directly used as fenders of port terminals; (2) waste tires are crushed into rubber powder; (3) waste tires are pyrolyzed to obtain oil, carbon black, and combustible gas and steel wire; (4) waste tires are made into reclaimed rubber; (5) waste tires are directly burned to generate electricity. Among them, pyrolysis is a technology that completely decomposes waste tires into various usable resources. It has the characteristics of large processing capacity, high efficiency and low environmental pollution, and is more in line with the recycling, harmlessness and reduction of waste disposal. Therefore, it is considered to be one of the best ways to recycle waste tires. Combustible gas, pyrolysis oil, pyrolysis charcoal, and steel wire can be obtained after pyrolysis of waste tires, among which pyrolysis oil is the main product of waste tire pyrolysis, and the yield can generally reach 40-60%, which shows the efficient utilization of pyrolysis oil It is very important to improve the economics of waste tire pyrolysis technology, and more importantly, it can also reduce the dependence on petroleum resources.
废轮胎热解油是一种宽馏分油，分成轻质馏分、中质馏分和重质馏分。本专利涉及的是废轮胎热解油中的重质馏分，由沸点＞300℃的烃类和非烃类化合物组成，约占热解油总量的1/3，称为废轮胎热解渣油。废轮胎热解油及其渣油目前唯一实际使用的方法是作为燃料油燃烧，但是由于废轮胎热解油及其渣油中硫、氮含量高，燃烧后转化为SOX、NOX，不仅造成环境污染，同时降低了其利用价值。Waste tire pyrolysis oil is a wide distillate oil, divided into light distillate, middle distillate and heavy distillate. This patent relates to the heavy fraction in waste tire pyrolysis oil, which is composed of hydrocarbons and non-hydrocarbon compounds with a boiling point > 300°C, accounting for about 1/3 of the total pyrolysis oil, called waste tire pyrolysis slag Oil. At present, the only practical way to use waste tire pyrolysis oil and its residue is to burn it as fuel oil. However, due to the high content of sulfur and nitrogen in waste tire pyrolysis oil and its residue, it will be converted into SO X and NO X after burning, not only Cause environmental pollution, reduce its utilization value simultaneously.
关于废轮胎热解渣油制备和改性道路沥青的专利尚末见发表。一些专利是有关于废轮胎粉碎成胶粉后改性道路沥青。废轮胎粉碎后的橡胶粉在一定温度下加入基质沥青，经过溶胀、剪切、发育后，制备成废轮胎橡胶粉改性沥青。中国专利CN201010013604.1涉及一种废轮胎橡胶粉改性沥青及其制备方法，组成中含基质沥青70～90％，废轮胎橡胶粉10～30％(wt)，形成的改性沥青，具有良好的综合性能。中国专利CN201010158246.3涉及一种橡胶沥青及其制备方法，橡胶沥青的组成为基质沥青和橡胶粉改性剂，橡胶粉改性剂的组成为废轮胎胶粉和己二醇。中国专利CN200510022110.9涉及一种改性沥青及其制备方法，组成中基质沥青与活化胶粉分别为70～85％和30～15％，活化胶粉为四甲基葵炔二醇按比例掺入废轮胎粉中拌和润湿，改性沥青具有较好的软化点、针入度和延伸度。中国专利CN03134620.0涉及一种用微波辐照废旧橡胶粉改性沥青的组合物及其制备方法；该改性沥青是以含蜡量较高的沥青为基质沥青，添加粉末丁苯橡胶和微波辐照过的废胶粉，高速剪切共混均匀而制成。改性后的沥青具有高温稳定、低温延度有明显增长和抗老化性能良好等特点。The patents on the preparation of waste tire pyrolysis residue and modified road asphalt have not yet been published. Some patents are about modifying road asphalt after crushing waste tires into rubber powder. The crushed rubber powder of waste tires is added to base asphalt at a certain temperature, and after swelling, shearing and development, the waste tire rubber powder modified asphalt is prepared. Chinese patent CN201010013604.1 relates to a waste tire rubber powder modified asphalt and its preparation method. The composition contains 70-90% of matrix asphalt and 10-30% (wt) of waste tire rubber powder. The modified asphalt formed has good comprehensive performance. Chinese patent CN201010158246.3 relates to a rubber asphalt and a preparation method thereof. The rubber asphalt is composed of matrix asphalt and a rubber powder modifier, and the rubber powder modifier is composed of waste tire rubber powder and hexylene glycol. Chinese patent CN200510022110.9 relates to a modified asphalt and its preparation method, in which the base asphalt and activated rubber powder are respectively 70-85% and 30-15% in the composition, and the activated rubber powder is tetramethyldecynediol mixed in proportion Mixed and wetted into waste tire powder, the modified asphalt has better softening point, penetration and elongation. Chinese patent CN03134620.0 relates to a composition for modifying asphalt with waste rubber powder irradiated by microwaves and its preparation method; the modified asphalt is based on asphalt with high wax content, and powdered styrene-butadiene rubber and microwave The irradiated waste rubber powder is made by high-speed shearing and blending uniformly. The modified asphalt has the characteristics of high temperature stability, obvious increase in low temperature ductility and good anti-aging performance.
【发明内容】 【Content of invention】
本发明的目的是针对现有技术的不足，提供一种废轮胎热解油中的渣油在制备和改性道路沥青中的应用。The purpose of the present invention is to address the deficiencies of the prior art and provide an application of the residual oil in the pyrolysis oil of waste tires in the preparation and modification of road asphalt.
本发明的构思是依据废轮胎热解渣油的化学组分与石油沥青相似，由饱和烃、芳香烃、胶质和沥青质组成。优质道路石油沥青一般含有饱和烃5～15％(wt)，芳香烃32～60％(wt)，胶质19～39％(wt)，沥青质6～15％(wt)。废轮胎热解渣油的化学组成在优质道路石油沥青的组成范围内，因此废轮胎热解渣油可直接制备道路沥青。废轮胎热解渣油中的芳香烃含量相对较高，而芳香烃对沥青质有很好的胶溶作用，有助于提高沥青的延度，形成稳定的胶体结构，因此废轮胎热解渣油可以改性基质沥青，使基质沥青的性质尤其是延度得到改善。The idea of the present invention is based on the fact that the chemical composition of waste tire pyrolysis residue is similar to that of petroleum asphalt, and consists of saturated hydrocarbons, aromatic hydrocarbons, colloids and asphaltenes. High-quality road petroleum asphalt generally contains 5-15% (wt) of saturated hydrocarbons, 32-60% (wt) of aromatic hydrocarbons, 19-39% (wt) of colloids, and 6-15% (wt) of asphaltenes. The chemical composition of waste tire pyrolysis residue is within the composition range of high-quality road petroleum asphalt, so waste tire pyrolysis residue can be directly prepared as road asphalt. The content of aromatic hydrocarbons in waste tire pyrolysis residue is relatively high, and aromatic hydrocarbons have a good peptization effect on asphaltene, which helps to improve the ductility of asphalt and form a stable colloidal structure, so waste tire pyrolysis residue The oil can modify the base asphalt, so that the properties of the base asphalt, especially the ductility, are improved.
本发明的目的是通过以下的技术方案来实现的：The purpose of the present invention is achieved by the following technical solutions:
一种废轮胎热解油中的渣油在制备和改性道路沥青中的应用，其特征在于，An application of residual oil in waste tire pyrolysis oil in the preparation and modification of road asphalt, characterized in that,
将各种条件下生产出的废轮胎热解油进行减压蒸馏，除去轻馏分，获取初馏点为300～550℃的渣油，作为制备道路沥青的基质沥青；废轮胎热解渣油的针入度、延度和软化点均达到相应牌号的道路石油沥青的技术指标，可直接作为制备道路沥青的基质沥青。The waste tire pyrolysis oil produced under various conditions is subjected to vacuum distillation to remove the light fraction, and the residue oil with an initial boiling point of 300-550°C is obtained as the base asphalt for preparing road asphalt; waste tire pyrolysis residue oil The penetration, ductility and softening point all meet the technical indicators of the corresponding grade of road petroleum asphalt, and can be directly used as the base asphalt for preparing road asphalt.
将废轮胎热解油中初馏点300～550℃的渣油与沥青进行混合，废轮胎热解渣油的掺入量为总体0.1～50％(wt)，总体为废轮胎热解渣油和基质沥青；在剪切温度50～250℃、剪切速率500～5000r/min、剪切时间1～60min的条件下，改性基质沥青，得到改性沥青；使基质沥青的性质尤其是延度得到改善。Mix the residual oil with an initial boiling point of 300-550°C in the pyrolysis oil of waste tires with asphalt, and the blending amount of the pyrolysis residue of waste tires is 0.1-50% (wt) of the total, and the residue of pyrolysis of waste tires is generally the waste tire pyrolysis residue and base asphalt; under the conditions of shear temperature 50-250°C, shear rate 500-5000r/min, and shear time 1-60min, modify base asphalt to obtain modified asphalt; make the properties of base asphalt especially extend degree is improved.
与现有技术相比，本发明的积极效果是；Compared with the prior art, the positive effect of the present invention is;
本发明为废轮胎热解渣油提供一条高价值的应用途径，克服了废轮胎热解渣油直接燃烧而产生环境污染的问题，降低对石油资源的依赖程度。The invention provides a high-value application path for the waste tire pyrolysis residue, overcomes the problem of environmental pollution caused by direct combustion of the waste tire pyrolysis residue, and reduces the dependence on petroleum resources.
【具体实施方式】 【Detailed ways】
以下提供本发明一种废轮胎热解油中的渣油在制备和改性道路沥青中的应用的具体实施方式。The following provides a specific embodiment of the application of the waste tire pyrolysis oil residue in the preparation and modification of road asphalt according to the present invention.
实施例1Example 1
对废轮胎热解油进行减压蒸馏，获取初馏点为420℃的废轮胎热解渣油，测定其性质，针入度(25℃)为210.7(0.1mm)，软化点为30.8℃，延度(15℃)为＞200(cm)，能满足牌号为200号道路石油沥青的技术指标。The waste tire pyrolysis oil was subjected to vacuum distillation to obtain waste tire pyrolysis residue with an initial boiling point of 420°C, and its properties were measured. The penetration (25°C) was 210.7 (0.1mm), and the softening point was 30.8°C. The ductility (15°C) is >200 (cm), which can meet the technical index of No. 200 road petroleum asphalt.
实施例2Example 2
对废轮胎热解油进行减压蒸馏，获取初馏点为430℃的废轮胎热解渣油，测定其性质，针入度(25℃)为172.2(0.1mm)，软化点为36.9℃，延度(15℃)为＞200(cm)，能满足牌号为180号道路石油沥青的技术指标。The waste tire pyrolysis oil was subjected to vacuum distillation to obtain waste tire pyrolysis residue with an initial boiling point of 430°C, and its properties were measured. The penetration (25°C) was 172.2 (0.1mm), and the softening point was 36.9°C. The ductility (15°C) is > 200 (cm), which can meet the technical index of No. 180 road petroleum asphalt.
实施例3Example 3
对废轮胎热解油进行减压蒸馏，获取初馏点为440℃的废轮胎热解渣油，测定其性质，针入度(25℃)为104.7(0.1mm)，软化点为40.0℃，延度(15℃)为＞200(cm)，能满足牌号为AH-110道路石油沥青的技术指标。The waste tire pyrolysis oil was subjected to vacuum distillation to obtain waste tire pyrolysis residue with an initial boiling point of 440°C, and its properties were measured. The penetration (25°C) was 104.7 (0.1mm), and the softening point was 40.0°C. The ductility (15°C) is >200 (cm), which can meet the technical index of AH-110 road petroleum asphalt.
实施例4Example 4
将初馏点为350℃的废轮胎热解油渣油以1％(wt)的比例掺入AH-70基质道路沥青。在剪切速率2000r/min、剪切时间10min、剪切温度140℃条件下混合。改性沥青的针入度(25℃)为67.0(0.1mm)，软化点为47.8℃，延度(15℃)为＞200(cm)，能满足牌号为AH-70道路石油沥青的技术指标。与AH-70基质道路沥青相比针入度略有上升，软化点略有下降，延度大幅度提高。AH-70基质道路沥青的针入度(25℃)为60.2(0.1mm)，软化点为48.6℃，延度(15℃)为130(cm)。The waste tire pyrolysis oil residue with an initial boiling point of 350°C was mixed into AH-70 matrix road asphalt at a ratio of 1% (wt). Mix under the conditions of shear rate 2000r/min, shear time 10min, and shear temperature 140°C. The penetration (25°C) of the modified asphalt is 67.0 (0.1mm), the softening point is 47.8°C, and the ductility (15°C) is >200 (cm), which can meet the technical indicators of the brand AH-70 road petroleum asphalt . Compared with the AH-70 matrix road asphalt, the penetration is slightly increased, the softening point is slightly decreased, and the ductility is greatly increased. The penetration (25°C) of AH-70 matrix road asphalt is 60.2 (0.1mm), the softening point is 48.6°C, and the ductility (15°C) is 130 (cm).
实施例5Example 5
将初馏点为350℃的废轮胎热解油渣油以2％(wt)的比例掺入AH-70基质道路沥青，在剪切速率2000r/min、剪切时间10min、剪切温度140℃条件下混合。改性沥青的针入度(25℃)为73.0(0.1mm)，软化点为47.2℃，延度(15℃)为＞200(cm)，能满足牌号为AH-70道路石油沥青的技术指标。与AH-70基质道路沥青相比针入度略有上升，软化点略有下降，延度大幅度提高。The waste tire pyrolysis oil residue with an initial boiling point of 350°C was mixed with AH-70 matrix road asphalt at a ratio of 2% (wt), at a shear rate of 2000r/min, a shear time of 10min, and a shear temperature of 140°C Mix under conditions. The penetration (25°C) of the modified asphalt is 73.0 (0.1mm), the softening point is 47.2°C, and the ductility (15°C) is >200 (cm), which can meet the technical indicators of the brand AH-70 road petroleum asphalt . Compared with the AH-70 matrix road asphalt, the penetration is slightly increased, the softening point is slightly decreased, and the ductility is greatly increased.
实施例6Example 6
将初馏点为350℃的废轮胎热解油渣油以3％(wt)的比例掺入AH-70基质道路沥青，在剪切速率2000r/min、剪切时间10min、剪切温度150℃条件下混合。改性沥青的针入度(25℃)为74.9(0.1mm)，软化点为46.8℃，延度(15℃)为＞200(cm)，能满足牌号为AH-70道路石油沥青的技术指标。与AH-70基质道路沥青相比针入度略有上升，软化点略有下降，延度大幅度提高。The waste tire pyrolysis oil residue with an initial boiling point of 350°C was mixed with AH-70 matrix road asphalt at a ratio of 3% (wt), at a shear rate of 2000r/min, a shear time of 10min, and a shear temperature of 150°C Mix under conditions. The penetration (25°C) of the modified asphalt is 74.9 (0.1mm), the softening point is 46.8°C, and the ductility (15°C) is >200 (cm), which can meet the technical indicators of the brand AH-70 road petroleum asphalt . Compared with the AH-70 matrix road asphalt, the penetration is slightly increased, the softening point is slightly decreased, and the ductility is greatly increased.
实施例7Example 7
将初馏点为350℃的废轮胎热解油渣油以4％(wt)的比例掺入AH-70基质道路沥青，在剪切速率2000r/min、剪切时间10min、剪切温度160℃条件下混合。改性沥青的针入度(25℃)为74.5(0.1mm)，软化点为46.1℃，延度(15℃)为＞200(cm)，能满足牌号为AH-70道路石油沥青的技术指标。与AH-70基质道路沥青相比针入度略有上升，软化点略有下降，延度大幅度提高。The waste tire pyrolysis oil residue with an initial boiling point of 350°C was mixed with AH-70 matrix road asphalt at a ratio of 4% (wt), at a shear rate of 2000r/min, a shear time of 10min, and a shear temperature of 160°C Mix under conditions. The penetration (25°C) of the modified asphalt is 74.5 (0.1mm), the softening point is 46.1°C, and the ductility (15°C) is >200 (cm), which can meet the technical indicators of the brand AH-70 road petroleum asphalt . Compared with the AH-70 matrix road asphalt, the penetration is slightly increased, the softening point is slightly decreased, and the ductility is greatly increased.
以上所述仅是本发明的优选实施例，应当指出，对于本技术领域的普通技术人员，在不脱离本发明构思的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围内。The above are only preferred embodiments of the present invention, and it should be pointed out that for those of ordinary skill in the art, some improvements and modifications can be made without departing from the concept of the present invention, and these improvements and modifications should also be considered Within the protection scope of the present invention.
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| CN111433288A (en) * | 2017-12-01 | 2020-07-17 | 埃尔根公司 | Method for modifying bitumen using oil with reduced polycyclic aromatic hydrocarbon (PAH) content obtained from pyrolysis of waste tires |
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