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Studies on the Modified Asphalt with Palygorskite, Airslake-coal Blend for Highway Road

Author: WangYouPeng
Tutor: WangYunPu
School: Northwest Normal University
Course: Polymer Chemistry and Physics
Keywords: Modified asphalt Palygorskite Microwave Organic palygorskite Weathered coal Styrene-butadiene rubber
CLC: U414
Type: Master's thesis
Year: 2006
Downloads: 82
Quote: 1
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Abstract


Road traffic is an important force to promote the development of the national economy, the rapid development of highway construction greatly promote the development and application of modified asphalt and bitumen modification process. The characteristics of domestic asphalt, reduce the cost of the modified asphalt to seek new asphalt modifier has become a major research topic for research workers. The research work of this paper consists of two parts: the first part: research advances described modified asphalt research progress at home and abroad, and composition of the nature of the asphalt made more comprehensive introduction to several important polymer asphalt modifier The agent has been categorized and performance introduced. Part II: Experiment and Mechanism Discussion 1 lists the experimental apparatus in this article, as well as the application of experimental methods and test methods. 2, palygorskite organically modified method was studied, using a conventional method and microwave feed palygorskite the organic modification, by infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), X - organically modified-ray diffraction (XRD), transmission electron microscopy (TEM), and thermal gravimetric analysis (TG) analysis methods to characterize the results showed that the conventional method and microwave method can effectively promote the exchange of ions, but compared to organic modification process, the microwave method is more simple, more obvious modification effect. 3 abundant palygorskite and the laboratory for the first time developed organic palygorskite complex powder SBR modified asphalt. Experimental results show that: the softening point was significantly elevated, has little effect on the low-temperature ductility, penetration decreased, indicating that the asphalt can improve high temperature stability and resistance to low temperature cracking resistance. The penetration loss RTFOT after its anti-aging properties, can be used as high-grade highway asphalt. Wavy layered structure of the modified asphalt was found by a scanning electron microscope (SEM), Further, by a transmission electron microscope (TEM), X-ray diffraction (XRD), thermal gravimetric analysis (TG) analysis method such as modified bitumen a characterization, to explore the possible modification mechanism. Palygorskite, organic palygorskite larger surface area can increase the stability of the modified asphalt. In addition, they can reduce its cost. 4, the first use of the the weathered coal mixed powder SBR modified asphalt. Experimental results show that: the high temperature performance of the asphalt at the same time the low temperature properties of the asphalt has little effect, while increasing the asphalt of the anti-aging and antioxidant properties, reducing the cost of modified asphalt can be used as high-grade highway asphalt. By scanning electron microscope (SEM), transmission electron microscope (TEM), infrared spectroscopy (FT-IR) analysis to characterize the modified asphalt and to explore the possible modification mechanism. Weathered coal humic acid adsorption and complexation ability, and some of the ingredients in the role of the modified asphalt, stability and some performance increase of modified asphalt. The subject of this study is the Gansu Provincial Science and Technology Department directed research projects, Northwest Normal University, scientific and technological innovation projects. Microwave synthesis of organic slope palygorskite, palygorskite and organic slope palygorskite complex powder SBR modified asphalt and weathered coal mixed powdered SBR modified asphalt and no domestic and foreign patent literature.

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