modification of asphalt pavement with polysulfide polymer
نویسندگان
چکیده
in petrochemical industry, the production of polyvinyl chloride (pvc) is accompanied by formation of heavy end wastes which consist of a mixture of di and multichloro compounds as kind of materials which are generated in ethylene dichloride (edc) purifcation. a high quantity of chloro compounds found in the heavy end waste allows it to be polymerized with alkaline polysulfdes to form polysulfde polymers. thus, according to this, the environmentally hazardous heavy ends waste can now be converted into useful polysulfde polymers without any environmental problem. there are some methods for synthesizing a polysulfde polymer (psp) from this waste. psp with a rubbery property can be used for modifcation of bitumen. in this research the effects of polysulfde polymer (psp) and the polysulfde polymer prepared by heavy end waste (wpsp) on bitumen and asphalt have been studied. samples of 1, 3, 5% of psp and wpsp as modifers in bitumen have been prepared and their physical and mechanical properties are compared. using this new modifer causes a fall in softening point (psp=39.5%, wpsp=27.6%) and increase in enetration point (psp=17.8% , wpsp=15.5%) and in asphalt mixture it causes decreases in rutting but has a small effect on marshall strength of asphalt samples (psp=4% , wpsp=11.6%).
منابع مشابه
An Introduction to Tire/Pavement Noise of Asphalt Pavement
1.0 Introduction ..........................................................................................................................................................2 2.0 Relevant Topics in Sound and Acoustics ............................................................................................................... 2.1 Sound...............................................................
متن کاملInvestigation of Clay Balls in Asphalt Pavement
Clay ball is a pavement surface defect which refers to a clump in which clay or dirt is 8 mixed with hot asphalt mixture. Clay ball is typically caused by a combination of aggregate 9 contamination of clay or soil, high aggregate moisture, and low production temperature at the 10 asphalt plant. It usually appears a few weeks or months after paving under traffic load, after being 11 liquefied an...
متن کاملPatch Distress Detection in Asphalt Pavement Images
Pavement condition assessment is an indispensable constituent in maintaining roadway infrastructure. Current practices for pavement condition assessment are labor intensive which introduce subjectivity in pavement rating and are time consuming. Automated methods rely on full 3D reconstruction of the pavement surface which introduces high equipment and computation costs. This paper presents a me...
متن کاملPothole detection in asphalt pavement images
Pavement condition assessment is essential when developing road network maintenance programs. In practice, the data collection process is to a large extent automated. However, pavement distress detection (cracks, potholes, etc.) is mostly performed manually, which is labor-intensive and time-consuming. Existing methods either rely on complete 3D surface reconstruction, which comes along with hi...
متن کاملThermal Stability Analysis under Embankment with Asphalt Pavement and Cement Pavement in Permafrost Regions
The permafrost degradation is the fundamental cause generating embankment diseases and pavement diseases in permafrost region while the permafrost degradation is related with temperature. Based on the field monitoring results of ground temperature along G214 Highway in high temperature permafrost regions, both the ground temperatures in superficial layer and the annual average temperatures unde...
متن کاملمنابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
علوم و تکنولوژی پلیمرجلد ۲۴، شماره ۳، صفحات ۲۴۱-۲۴۹
میزبانی شده توسط پلتفرم ابری doprax.com
copyright © 2015-2023