نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشگاه تربیت مدرس
2 مرکز تحقیقات راه، مسکن و شهرسازی
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Aggregates form the structural skeleton of the asphalt mixture. Thus, the physical, mechanical, and chemical characteristics of the stone play significant role on the performance of the asphalt. By identifying the geological characteristics of the aggregates, vital information could be obtained about the behavior of asphalt during utilization. In this research, 13 carbonate mountain mines with diverse geological formations located in Ardabil, Isfahan, Tehran, Zanjan, Semnan, Qom and Hamadan provinces were sampled. The geological characteristics of the rocks in each mine, including the type of texture, the minerals and its constituent elements, were identified and the influence of the determined geological characteristics on the experiments results of Asphalt samples were investigated and evaluated. These experiments include boiling water, indirect tension, marshall strength ratio of asphalt, as well as bitumen absorption of the aggregates. The results of the investigations show that the type of microscopic texture of carbonate rocks is influential in reducing or increasing bitumen absorption. In addition, the presence of evaporative minerals, even in small amounts, increases the moisture sensitivity of asphalt.
کلیدواژهها [English]
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