کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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856338 | 1470718 | 2015 | 8 صفحه PDF | دانلود رایگان |
Higher requirements concerning environmental protection and occupational health and safety entailed the development of new asphalt mix production technologies, characterized by production temperature lowered by 60 to 80 °C. In addition to environmental advantages, such bituminous mixtures also provide technological and economical benefits. The reference asphalt concrete AC 22W and experimental foamed bitumen asphalt modified with F-T wax was designed to respond to the requirements named above. The production and compaction temperature of the foamed bitumen asphalt was 95 °C (Half Warm Mix Asphalt). A traditional Hot Mix Asphalt was also produced for the purpose of comparison. The study investigated the effect of two factors: the amount of F-T synthetic wax (from 1.0% to 2.5% with an increment of 0.5%) and the amount of foamed bitumen (from 4.2 to 5.1, with an increment of 0.3%) on the development of permanent deformations in asphalt concrete, one of the most significant service parameters of the asphalt pavement. The results from the study indicate that the addition of F-T synthetic wax to the bitumen before foaming gives the asphalt concrete (produced at 95 °C) resistance to permanent deformations comparable to that of the traditional asphalt concrete, produced at a temperature of 160 °C.
Journal: Procedia Engineering - Volume 108, 2015, Pages 459-466