توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Bitumen Modification Using Precipitateed Calcium Carbonate (P.C.C.) Coated with Polmeric Compounds
اطلاعات انتشار: اولین همایش بین المللی قیر، سال
تعداد صفحات: ۴
Bitumen has been used for a variety of purposes, but most importantly for road surfacing. Bitumen has been known as a good binder in paving application because of its special interesting characteristics, but increasing traffic loading and volumes on roads has led to the use of modifiers to improve the performance of bitumen. In this work precipitated calcium carbonate coated by thin layer of a polymeric compound (named as P.C.C.) has been used as a modifier for bitumen. Bitumen mixtures contained different amount of this material were prepared. Then the effects of P.C.C. addition on the bitumen performance were evaluated through common tests such as penetration, softening point, kinematic viscosity and temperature susceptibility. The modified bitumen was used in the asphalt and its performance was studied. The obtained results showed that, using of (P.C.C.) increases dramatically Marshall Number and eliminates rutting at tropical regions. According to the results a mechanism for the effect of P.C.C. was illustrated.<\div>

۲Bitumen modified with ground tire rubber and P.C.C.
اطلاعات انتشار: اولین همایش بین المللی قیر، سال
تعداد صفحات: ۴
Bitumen has been widely used as a binder in pavement mixtures. Certain binder properties are required in this application to prevent the occurrence of rutting, fatigue and thermal cracking. Today's increasing loads, greater traffic volume and the need for better, longer–lasting roads demand better service from paving materials and considerable research in recent years has focused on improving the functional properties of bitumen. The use of polymeric material in bitumen mixture has been shown as a good method to improve the performance of the mixture. In this work ground tire rubber in combination with precipitated calcium carbonate were used to improve performance of conventional asphalts. Bitumen mixtures contained different amount of these modifiers were prepared. Then the effects of the used modifiers on bitumen performance were studied through measuring degree of penetration and softening point of the mixture. The modified bitumen was used in the asphalt and its performance was studied and reported.<\div>
نمایش نتایج ۱ تا ۲ از میان ۲ نتیجه