The application of rubber modification aims at improving the bonding performance of asphalt concrete and reducing the inherent temperature of adhesive. Y. Asphalt and particles expand with asphalt and CRM particles in the absorption part, thus increasing the optimization performance of cohesiveness and stiffness. Static CRM adhesive in hot mix asphalt pavement (association) is considered to be due to various unknown interactions with asphalt concrete adhesive, different sources and the size ratio of customer relationship management (CRM). In this study, the laboratory investigated the properties, CRM treatment methods and percentage of the adhesive. * * * There are 24 CRM bookbinding (3 glue sources * 2 * 4 customer relationship management (CRM customer relationship management (CRM) processing method), and the accelerated aging of production percentage is through manual digging aging process. The evaluation mainly includes CRM sand mold testing procedures: high viscosity, high performance, moderate temperature and low crack resistance. The results of this study show that higher customer relationship management (CRM) as a CRM adhesive seems to lead to higher viscosity, better rutting resistance and lower chance of low temperature cracking. Generally speaking, environment and customer relationship management (CRM) has been found to be more effective in producing more CRM adhesives, which are more sticky and less prone to rutting and cracks.
Key words: rutted rubber modified hot mix asphalt concrete pavement, peanut, low temperature resistance, cracking
1。 introduce
1 1 background,
There are two main methods to produce peanuts from rubber: environmental law and low temperature grinding. Each method can produce palm gum with similar size, but the difference of main ear lies in grain texture. Rubber crumb processing equipment, biscuits are irregular in shape due to their tearing and crushing of rubber particles, which leads to rough texture. This small rubber nail produces a low temperature method. On the other hand, it has a smooth surface, like broken glass. This difference in grain surface texture effect has a higher low-temperature brown rubber surface area around the spike [1]
To increase the application of customer relationship management (CRM) in asphalt pavement, it is necessary to better understand its role in physical, chemical and performance CRM adhesives. Generally speaking, in addition to asphalt wrapping tools, the purpose of customer relationship management system is to improve the properties of adhesives, such as reducing the inherent temperature sensitivity. The interaction between the characteristics of improving the adhesion of customer relationship management (CRM) depends to a great extent on the formation of viscous gel in the adhesive expanded by CRM particles by CRM and asphalt wrapping tools, which leads to the increase of the viscosity of CRM adhesive [2? -]。 However, in a large range, the temperature of CRM bonding is not considered to be due to the different interaction with asphalt concrete binder, but mainly customer relationship management (CRM depends on chemistry (that is, asphalt binder). ... source) and customer relationship management (CRM) as well as percentage, granularity and tex? Correct Customer Relationship Management (CRM) and the temperature and time of interaction.
12。 Purpose and scope of the study
The main purpose of this study is to explore the engineering properties of CRM adhesive. Due to the processing method of CRM, the percentage of Superpave adhesive is selected through testing. CRM binder production laboratory is divided into three basic binders, namely, environment and customer relationship management (CRM)(2) and ultra-low temperature four CRM percentages (5%, 10%, 15%, 20%). CRM adhesive is used for artificial aging using P V (pressure vessel) program. The aging rutting performance, viscosity and low-temperature cracking performance of unaged CRM adhesive were comprehensively evaluated. Figure 1 shows a flowchart design experiment.
2。 Materials and test procedures
2. 1。 material
2. 1. 1。 Asphalt bonding tool
Three kinds of asphalt packaging tools are rated as 64-22 pages, designated as B and C, and come from different crude oil sources. One is the source of crude oil in Venezuela, the other is the source of B in the Middle East, and the other is the mixture of C. This cost will be borne by the seller. Each adhesive has a grade, and the performance grade is verified according to laws and administrative regulations AASHTO M320. Table 1 summarizes the characteristics and other symptoms of three basic adhesives.
2. 1.2。 Rubber modified crumbs (CRM)
This study was obtained from two sources. Quan Yi source method uses environmental debris to turn rubber tires into waste passengers and other low-temperature grinding processes. One size of small rubber comes from every source: 0.425 grid (-40 mm), which is widely used in the production of CRM mixture in South Carolina. Each small rubber at this stage is shown in Figure 2. The surface texture of each customer relationship management (CRM) is carried out by scanning electron microscope (SEM) with magnification of 120 times (Figure 3).
22。 Preparation and aging of CRM adhesive
Mixed use in the research process, before wet CRM is added to the base, is in asphalt concrete matrix. The production base of CRM adhesive and two laboratories that never used adhesive were kept at 177℃ for 30 minutes, and the stirring speed was as high as 700 rpm [8]. This mixing condition is consistent with the mixture used in manufacturing in South Carolina. In a word, 24 CRM bookbinding (3 adhesive sources * 2 * 4 customer relationship management (percentage of CRM processing methods) and 3 control adhesive production and evaluation are studied here. At that time, CRM and adhesive control, by accelerating the aging process for 20 hours, the driver has aged at 100℃ like a well-trained driver [9].
23。 Test of Superpave binder
The properties of these CRM binding materials are evaluated. Superpave selection test program, including adhesive viscosity test (AASHTO T 3 16), BBR (beam bending AASHTO rheometer) (T) and assembly with dynamic shear rheometer (AASHTO T 3 15: adjust to 2mm with plate gap). This plate gap adjustment is used to eliminate rubber particles (10- 12). By rotating the viscosity BBR, the sample was repeatedly fitted with three samples. The results reported are the average of these tests.
There are 1050 g adhesive samples used for testing sand molds and customer relationship management (CRM No.27 controls testing sand molds in a rotating viscometer with a rotating shaft 135℃). According to the same procedure, only one 85g sample used spindle 2 1. Different testing configurations of CRM adhesives allow more space. Title of rubber particle partition: Influence of small rubber modification (CRM) performance of plastic adhesives on hot-mix asphalt concrete pavement.
About the author: Soon-Jae Li *, Chandra k. Akisetty, Serji Nitrogen, Amirkhanian.
School of Civil Engineering, Munson University, Munson, SC 29634-09 1 1. United States of America
The revised form was received on February 28th, 2007; March 26th, 2007 16, April 2007.
It was opened on June 7, 2007/KLOC-0.
Text: Abstract
The application of rubber modification aims at improving the bonding performance of asphalt concrete and reducing the inherent temperature of adhesive. Y. Asphalt and particles expand with asphalt and CRM particles in the absorption part, thus increasing the optimization performance of cohesiveness and stiffness. Static CRM adhesive in hot mix asphalt pavement (association) is considered to be due to various unknown interactions with asphalt concrete adhesive, different sources and the size ratio of customer relationship management (CRM). In this study, the laboratory investigated the properties, CRM treatment methods and percentage of the adhesive. * * * There are 24 CRM bookbinding (3 glue sources * 2 * 4 customer relationship management (CRM customer relationship management (CRM) processing method), and the accelerated aging of production percentage is through manual digging aging process. The evaluation mainly includes CRM sand mold testing procedures: high viscosity, high performance, moderate temperature and low crack resistance. The results of this study show that higher customer relationship management (CRM) as a CRM adhesive seems to lead to higher viscosity, better rutting resistance and lower chance of low temperature cracking. Generally speaking, environment and customer relationship management (CRM) has been found to be more effective in producing more CRM adhesives, which are more sticky and less prone to rutting and cracks.
Key words: rutted rubber modified hot mix asphalt concrete pavement, peanut, low temperature resistance, cracking
1。 introduce
1 1 background,
There are two main methods to produce peanuts from rubber: environmental law and low temperature grinding. Each method can produce palm gum with similar size, but the difference of main ear lies in grain texture. Rubber crumb processing equipment, biscuits are irregular in shape due to their tearing and crushing of rubber particles, which leads to rough texture. This small rubber nail produces a low temperature method. On the other hand, it has a smooth surface, like broken glass. This difference in grain surface texture effect has a higher low-temperature brown rubber surface area around the spike [1]
To increase the application of customer relationship management (CRM) in asphalt pavement, it is necessary to better understand its role in physical, chemical and performance CRM adhesives. Generally speaking, in addition to asphalt wrapping tools, the purpose of customer relationship management system is to improve the properties of adhesives, such as reducing the inherent temperature sensitivity. The interaction between the characteristics of improving the adhesion of customer relationship management (CRM) depends to a great extent on the formation of viscous gel in the adhesive expanded by CRM particles by CRM and asphalt wrapping tools, which leads to the increase of the viscosity of CRM adhesive [2? -]。 However, in a large range, the temperature of CRM bonding is not considered to be due to the different interaction with asphalt concrete binder, but mainly customer relationship management (CRM depends on chemistry (that is, asphalt binder). ... source) and customer relationship management (CRM) as well as percentage, granularity and tex? Correct Customer Relationship Management (CRM) and the temperature and time of interaction.
12。 Purpose and scope of the study
The main purpose of this study is to explore the engineering properties of CRM adhesive. Due to the processing method of CRM, the percentage of Superpave adhesive is selected through testing. CRM binder production laboratory is divided into three basic binders, namely, environment and customer relationship management (CRM)(2) and ultra-low temperature four CRM percentages (5%, 10%, 15%, 20%). CRM adhesive is used for artificial aging using P V (pressure vessel) program. The aging rutting performance, viscosity and low-temperature cracking performance of unaged CRM adhesive were comprehensively evaluated. Figure 1 shows a flowchart design experiment.
2。 Materials and test procedures
2. 1。 material
2. 1. 1。 Asphalt bonding tool
Three kinds of asphalt packaging tools are rated as 64-22 pages, designated as B and C, and come from different crude oil sources. One is the source of crude oil in Venezuela, the other is the source of B in the Middle East, and the other is the mixture of C. This cost will be borne by the seller. Each adhesive has a grade, and the performance grade is verified according to laws and administrative regulations AASHTO M320. Table 1 summarizes the characteristics and other symptoms of three basic adhesives.
2. 1.2。 Rubber modified crumbs (CRM)
This study was obtained from two sources. Quan Yi source method uses environmental debris to turn rubber tires into waste passengers and other low-temperature grinding processes. One size of small rubber comes from every source: 0.425 grid (-40 mm), which is widely used in the production of CRM mixture in South Carolina. Each small rubber at this stage is shown in Figure 2. The surface texture of each customer relationship management (CRM) is carried out by scanning electron microscope (SEM) with magnification of 120 times (Figure 3).
22。 Preparation and aging of CRM adhesive
Mixed use in the research process, before wet CRM is added to the base, is in asphalt concrete matrix. The production base of CRM adhesive and two laboratories that never used adhesive were kept at 177℃ for 30 minutes, and the stirring speed was as high as 700 rpm [8]. This mixing condition is consistent with the mixture used in manufacturing in South Carolina. In a word, 24 CRM bookbinding (3 adhesive sources * 2 * 4 customer relationship management (percentage of CRM processing methods) and 3 control adhesive production and evaluation are studied here. At that time, CRM and adhesive control, by accelerating the aging process for 20 hours, the driver has aged at 100℃ like a well-trained driver [9].
23。 Test of Superpave binder
The properties of these CRM binding materials are evaluated. Superpave chose a month and a half later and put forward a pair of tickets. On my birthday, I stuffed his shirts into his pants before the band found them, and then I succeeded. They invited Emily to a book signing. Barnes and Reading, writers, I absolutely admire them.
"I'm sorry about that. Today is not next weekend, but I think we can celebrate your birthday exactly the same time." He blinked.
I am very excited. This week, I bought all her books, because I should mark her in four of them, because we only allow everyone to sign. Colin laughed at me and said that I promised him to line up so that I could have two signatures instead of one, which was my childish behavior.
On the day's activities, we went to the bookstore. They cleaned up a storage space and pushed it on the bookshelf, so that the whole place looked denser than I remembered, just like a jungle, with magic, and spent the night by itself. Of course I feel amazing, looking at the short stage and half-filled rows of chairs to worship it.
Colin took my hand and led me to the last seat. When I protested, he smiled and pointed to the spokesman second only to the United States.
"But if we sit in the front seat, I can read her lips!"
"But that's not the key reading material, is it?"
"But,"
"Do you admire her words or her appearance? Would you like to hear your own explanation of her words, or would you like to see her face? "
I sat down and grabbed two Emily? Barnes' book. Confirm it tonight, Emily? Barnes, we, Colin.
It'll be perfect. Sometimes I think.
The manager of this shop came to the stage at 6 pm on time. Her turquoise heels are unstable, and I imagine the click and every step.
"Ladies and gentlemen," she said.
The quality of the broadcast system is not very high, and the bookstore is not suitable, but if I concentrate, I can ask the store manager to introduce every word. Emily. Barnes Colin held my hand tightly and raised his eyebrows and looked at me. I told him my sweet smile and nodded in agreement.